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-rw-r--r--Documentation/security/keys.txt14
-rw-r--r--crypto/asymmetric_keys/Kconfig33
-rw-r--r--crypto/asymmetric_keys/Makefile37
-rw-r--r--crypto/asymmetric_keys/asymmetric_type.c27
-rw-r--r--crypto/asymmetric_keys/mscode.asn128
-rw-r--r--crypto/asymmetric_keys/mscode_parser.c126
-rw-r--r--crypto/asymmetric_keys/pkcs7.asn1127
-rw-r--r--crypto/asymmetric_keys/pkcs7_key_type.c99
-rw-r--r--crypto/asymmetric_keys/pkcs7_parser.c396
-rw-r--r--crypto/asymmetric_keys/pkcs7_parser.h61
-rw-r--r--crypto/asymmetric_keys/pkcs7_trust.c219
-rw-r--r--crypto/asymmetric_keys/pkcs7_verify.c323
-rw-r--r--crypto/asymmetric_keys/verify_pefile.c457
-rw-r--r--crypto/asymmetric_keys/verify_pefile.h42
-rw-r--r--crypto/asymmetric_keys/x509.asn12
-rw-r--r--crypto/asymmetric_keys/x509_cert_parser.c20
-rw-r--r--crypto/asymmetric_keys/x509_parser.h13
-rw-r--r--crypto/asymmetric_keys/x509_public_key.c2
-rw-r--r--fs/nfs/idmap.c8
-rw-r--r--include/crypto/pkcs7.h36
-rw-r--r--include/keys/big_key-type.h3
-rw-r--r--include/keys/user-type.h3
-rw-r--r--include/linux/key-type.h5
-rw-r--r--include/linux/oid_registry.h8
-rw-r--r--include/linux/pe.h448
-rw-r--r--include/linux/verify_pefile.h18
-rw-r--r--net/ceph/crypto.c26
-rw-r--r--net/dns_resolver/dns_key.c43
-rw-r--r--net/rxrpc/ar-key.c165
-rw-r--r--security/keys/big_key.c41
-rw-r--r--security/keys/encrypted-keys/encrypted.c2
-rw-r--r--security/keys/key.c49
-rw-r--r--security/keys/keyring.c34
-rw-r--r--security/keys/request_key_auth.c13
-rw-r--r--security/keys/user_defined.c41
35 files changed, 2780 insertions, 189 deletions
diff --git a/Documentation/security/keys.txt b/Documentation/security/keys.txt
index a4c33f1a7c6d..8727c194ca16 100644
--- a/Documentation/security/keys.txt
+++ b/Documentation/security/keys.txt
@@ -1150,20 +1150,24 @@ The structure has a number of fields, some of which are mandatory:
const void *data;
size_t datalen;
size_t quotalen;
+ time_t expiry;
};
Before calling the method, the caller will fill in data and datalen with
the payload blob parameters; quotalen will be filled in with the default
- quota size from the key type and the rest will be cleared.
+ quota size from the key type; expiry will be set to TIME_T_MAX and the
+ rest will be cleared.
If a description can be proposed from the payload contents, that should be
attached as a string to the description field. This will be used for the
key description if the caller of add_key() passes NULL or "".
The method can attach anything it likes to type_data[] and payload. These
- are merely passed along to the instantiate() or update() operations.
+ are merely passed along to the instantiate() or update() operations. If
+ set, the expiry time will be applied to the key if it is instantiated from
+ this data.
- The method should return 0 if success ful or a negative error code
+ The method should return 0 if successful or a negative error code
otherwise.
@@ -1172,7 +1176,9 @@ The structure has a number of fields, some of which are mandatory:
This method is only required if the preparse() method is provided,
otherwise it is unused. It cleans up anything attached to the
description, type_data and payload fields of the key_preparsed_payload
- struct as filled in by the preparse() method.
+ struct as filled in by the preparse() method. It will always be called
+ after preparse() returns successfully, even if instantiate() or update()
+ succeed.
(*) int (*instantiate)(struct key *key, struct key_preparsed_payload *prep);
diff --git a/crypto/asymmetric_keys/Kconfig b/crypto/asymmetric_keys/Kconfig
index 03a6eb95ab50..ca41be5631c7 100644
--- a/crypto/asymmetric_keys/Kconfig
+++ b/crypto/asymmetric_keys/Kconfig
@@ -33,8 +33,39 @@ config X509_CERTIFICATE_PARSER
select ASN1
select OID_REGISTRY
help
- This option procides support for parsing X.509 format blobs for key
+ This option provides support for parsing X.509 format blobs for key
data and provides the ability to instantiate a crypto key from a
public key packet found inside the certificate.
+config PKCS7_MESSAGE_PARSER
+ tristate "PKCS#7 message parser"
+ depends on X509_CERTIFICATE_PARSER
+ select ASN1
+ select OID_REGISTRY
+ help
+ This option provides support for parsing PKCS#7 format messages for
+ signature data and provides the ability to verify the signature.
+
+config PKCS7_TEST_KEY
+ tristate "PKCS#7 testing key type"
+ depends on PKCS7_MESSAGE_PARSER
+ select SYSTEM_TRUSTED_KEYRING
+ help
+ This option provides a type of key that can be loaded up from a
+ PKCS#7 message - provided the message is signed by a trusted key. If
+ it is, the PKCS#7 wrapper is discarded and reading the key returns
+ just the payload. If it isn't, adding the key will fail with an
+ error.
+
+ This is intended for testing the PKCS#7 parser.
+
+config SIGNED_PE_FILE_VERIFICATION
+ bool "Support for PE file signature verification"
+ depends on PKCS7_MESSAGE_PARSER=y
+ select ASN1
+ select OID_REGISTRY
+ help
+ This option provides support for verifying the signature(s) on a
+ signed PE binary.
+
endif # ASYMMETRIC_KEY_TYPE
diff --git a/crypto/asymmetric_keys/Makefile b/crypto/asymmetric_keys/Makefile
index 0727204aab68..e47fcd9ac5e8 100644
--- a/crypto/asymmetric_keys/Makefile
+++ b/crypto/asymmetric_keys/Makefile
@@ -25,3 +25,40 @@ $(obj)/x509_rsakey-asn1.o: $(obj)/x509_rsakey-asn1.c $(obj)/x509_rsakey-asn1.h
clean-files += x509-asn1.c x509-asn1.h
clean-files += x509_rsakey-asn1.c x509_rsakey-asn1.h
+
+#
+# PKCS#7 message handling
+#
+obj-$(CONFIG_PKCS7_MESSAGE_PARSER) += pkcs7_message.o
+pkcs7_message-y := \
+ pkcs7-asn1.o \
+ pkcs7_parser.o \
+ pkcs7_trust.o \
+ pkcs7_verify.o
+
+$(obj)/pkcs7_parser.o: $(obj)/pkcs7-asn1.h
+$(obj)/pkcs7-asn1.o: $(obj)/pkcs7-asn1.c $(obj)/pkcs7-asn1.h
+
+clean-files += pkcs7-asn1.c pkcs7-asn1.h
+
+#
+# PKCS#7 parser testing key
+#
+obj-$(CONFIG_PKCS7_TEST_KEY) += pkcs7_test_key.o
+pkcs7_test_key-y := \
+ pkcs7_key_type.o
+
+#
+# Signed PE binary-wrapped key handling
+#
+obj-$(CONFIG_SIGNED_PE_FILE_VERIFICATION) += verify_signed_pefile.o
+
+verify_signed_pefile-y := \
+ verify_pefile.o \
+ mscode_parser.o \
+ mscode-asn1.o
+
+$(obj)/mscode_parser.o: $(obj)/mscode-asn1.h $(obj)/mscode-asn1.h
+$(obj)/mscode-asn1.o: $(obj)/mscode-asn1.c $(obj)/mscode-asn1.h
+
+clean-files += mscode-asn1.c mscode-asn1.h
diff --git a/crypto/asymmetric_keys/asymmetric_type.c b/crypto/asymmetric_keys/asymmetric_type.c
index c948df5c4ecd..eb8cd46961a5 100644
--- a/crypto/asymmetric_keys/asymmetric_type.c
+++ b/crypto/asymmetric_keys/asymmetric_type.c
@@ -169,7 +169,7 @@ static void asymmetric_key_free_preparse(struct key_preparsed_payload *prep)
pr_devel("==>%s()\n", __func__);
if (subtype) {
- subtype->destroy(prep->payload);
+ subtype->destroy(prep->payload[0]);
module_put(subtype->owner);
}
kfree(prep->type_data[1]);
@@ -177,29 +177,6 @@ static void asymmetric_key_free_preparse(struct key_preparsed_payload *prep)
}
/*
- * Instantiate a asymmetric_key defined key. The key was preparsed, so we just
- * have to transfer the data here.
- */
-static int asymmetric_key_instantiate(struct key *key, struct key_preparsed_payload *prep)
-{
- int ret;
-
- pr_devel("==>%s()\n", __func__);
-
- ret = key_payload_reserve(key, prep->quotalen);
- if (ret == 0) {
- key->type_data.p[0] = prep->type_data[0];
- key->type_data.p[1] = prep->type_data[1];
- key->payload.data = prep->payload;
- prep->type_data[0] = NULL;
- prep->type_data[1] = NULL;
- prep->payload = NULL;
- }
- pr_devel("<==%s() = %d\n", __func__, ret);
- return ret;
-}
-
-/*
* dispose of the data dangling from the corpse of a asymmetric key
*/
static void asymmetric_key_destroy(struct key *key)
@@ -218,7 +195,7 @@ struct key_type key_type_asymmetric = {
.name = "asymmetric",
.preparse = asymmetric_key_preparse,
.free_preparse = asymmetric_key_free_preparse,
- .instantiate = asymmetric_key_instantiate,
+ .instantiate = generic_key_instantiate,
.match = asymmetric_key_match,
.destroy = asymmetric_key_destroy,
.describe = asymmetric_key_describe,
diff --git a/crypto/asymmetric_keys/mscode.asn1 b/crypto/asymmetric_keys/mscode.asn1
new file mode 100644
index 000000000000..6d09ba48c41c
--- /dev/null
+++ b/crypto/asymmetric_keys/mscode.asn1
@@ -0,0 +1,28 @@
+--- Microsoft individual code signing data blob parser
+---
+--- Copyright (C) 2012 Red Hat, Inc. All Rights Reserved.
+--- Written by David Howells (dhowells@redhat.com)
+---
+--- This program is free software; you can redistribute it and/or
+--- modify it under the terms of the GNU General Public Licence
+--- as published by the Free Software Foundation; either version
+--- 2 of the Licence, or (at your option) any later version.
+---
+
+MSCode ::= SEQUENCE {
+ type SEQUENCE {
+ contentType ContentType,
+ parameters ANY
+ },
+ content SEQUENCE {
+ digestAlgorithm DigestAlgorithmIdentifier,
+ digest OCTET STRING ({ mscode_note_digest })
+ }
+}
+
+ContentType ::= OBJECT IDENTIFIER ({ mscode_note_content_type })
+
+DigestAlgorithmIdentifier ::= SEQUENCE {
+ algorithm OBJECT IDENTIFIER ({ mscode_note_digest_algo }),
+ parameters ANY OPTIONAL
+}
diff --git a/crypto/asymmetric_keys/mscode_parser.c b/crypto/asymmetric_keys/mscode_parser.c
new file mode 100644
index 000000000000..214a992123cd
--- /dev/null
+++ b/crypto/asymmetric_keys/mscode_parser.c
@@ -0,0 +1,126 @@
+/* Parse a Microsoft Individual Code Signing blob
+ *
+ * Copyright (C) 2014 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+
+#define pr_fmt(fmt) "MSCODE: "fmt
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/oid_registry.h>
+#include <crypto/pkcs7.h>
+#include "verify_pefile.h"
+#include "mscode-asn1.h"
+
+/*
+ * Parse a Microsoft Individual Code Signing blob
+ */
+int mscode_parse(struct pefile_context *ctx)
+{
+ const void *content_data;
+ size_t data_len;
+ int ret;
+
+ ret = pkcs7_get_content_data(ctx->pkcs7, &content_data, &data_len, 1);
+
+ if (ret) {
+ pr_debug("PKCS#7 message does not contain data\n");
+ return ret;
+ }
+
+ pr_devel("Data: %zu [%*ph]\n", data_len, (unsigned)(data_len),
+ content_data);
+
+ return asn1_ber_decoder(&mscode_decoder, ctx, content_data, data_len);
+}
+
+/*
+ * Check the content type OID
+ */
+int mscode_note_content_type(void *context, size_t hdrlen,
+ unsigned char tag,
+ const void *value, size_t vlen)
+{
+ enum OID oid;
+
+ oid = look_up_OID(value, vlen);
+ if (oid == OID__NR) {
+ char buffer[50];
+
+ sprint_oid(value, vlen, buffer, sizeof(buffer));
+ pr_err("Unknown OID: %s\n", buffer);
+ return -EBADMSG;
+ }
+
+ /*
+ * pesign utility had a bug where it was putting
+ * OID_msIndividualSPKeyPurpose instead of OID_msPeImageDataObjId
+ * So allow both OIDs.
+ */
+ if (oid != OID_msPeImageDataObjId &&
+ oid != OID_msIndividualSPKeyPurpose) {
+ pr_err("Unexpected content type OID %u\n", oid);
+ return -EBADMSG;
+ }
+
+ return 0;
+}
+
+/*
+ * Note the digest algorithm OID
+ */
+int mscode_note_digest_algo(void *context, size_t hdrlen,
+ unsigned char tag,
+ const void *value, size_t vlen)
+{
+ struct pefile_context *ctx = context;
+ char buffer[50];
+ enum OID oid;
+
+ oid = look_up_OID(value, vlen);
+ switch (oid) {
+ case OID_md4:
+ ctx->digest_algo = HASH_ALGO_MD4;
+ break;
+ case OID_md5:
+ ctx->digest_algo = HASH_ALGO_MD5;
+ break;
+ case OID_sha1:
+ ctx->digest_algo = HASH_ALGO_SHA1;
+ break;
+ case OID_sha256:
+ ctx->digest_algo = HASH_ALGO_SHA256;
+ break;
+
+ case OID__NR:
+ sprint_oid(value, vlen, buffer, sizeof(buffer));
+ pr_err("Unknown OID: %s\n", buffer);
+ return -EBADMSG;
+
+ default:
+ pr_err("Unsupported content type: %u\n", oid);
+ return -ENOPKG;
+ }
+
+ return 0;
+}
+
+/*
+ * Note the digest we're guaranteeing with this certificate
+ */
+int mscode_note_digest(void *context, size_t hdrlen,
+ unsigned char tag,
+ const void *value, size_t vlen)
+{
+ struct pefile_context *ctx = context;
+
+ ctx->digest = value;
+ ctx->digest_len = vlen;
+ return 0;
+}
diff --git a/crypto/asymmetric_keys/pkcs7.asn1 b/crypto/asymmetric_keys/pkcs7.asn1
new file mode 100644
index 000000000000..a5a14ef28c86
--- /dev/null
+++ b/crypto/asymmetric_keys/pkcs7.asn1
@@ -0,0 +1,127 @@
+PKCS7ContentInfo ::= SEQUENCE {
+ contentType ContentType,
+ content [0] EXPLICIT SignedData OPTIONAL
+}
+
+ContentType ::= OBJECT IDENTIFIER ({ pkcs7_note_OID })
+
+SignedData ::= SEQUENCE {
+ version INTEGER,
+ digestAlgorithms DigestAlgorithmIdentifiers,
+ contentInfo ContentInfo,
+ certificates CHOICE {
+ certSet [0] IMPLICIT ExtendedCertificatesAndCertificates,
+ certSequence [2] IMPLICIT Certificates
+ } OPTIONAL ({ pkcs7_note_certificate_list }),
+ crls CHOICE {
+ crlSet [1] IMPLICIT CertificateRevocationLists,
+ crlSequence [3] IMPLICIT CRLSequence
+ } OPTIONAL,
+ signerInfos SignerInfos
+}
+
+ContentInfo ::= SEQUENCE {
+ contentType ContentType,
+ content [0] EXPLICIT Data OPTIONAL
+}
+
+Data ::= ANY ({ pkcs7_note_data })
+
+DigestAlgorithmIdentifiers ::= CHOICE {
+ daSet SET OF DigestAlgorithmIdentifier,
+ daSequence SEQUENCE OF DigestAlgorithmIdentifier
+}
+
+DigestAlgorithmIdentifier ::= SEQUENCE {
+ algorithm OBJECT IDENTIFIER ({ pkcs7_note_OID }),
+ parameters ANY OPTIONAL
+}
+
+--
+-- Certificates and certificate lists
+--
+ExtendedCertificatesAndCertificates ::= SET OF ExtendedCertificateOrCertificate
+
+ExtendedCertificateOrCertificate ::= CHOICE {
+ certificate Certificate, -- X.509
+ extendedCertificate [0] IMPLICIT ExtendedCertificate -- PKCS#6
+}
+
+ExtendedCertificate ::= Certificate -- cheating
+
+Certificates ::= SEQUENCE OF Certificate
+
+CertificateRevocationLists ::= SET OF CertificateList
+
+CertificateList ::= SEQUENCE OF Certificate -- This may be defined incorrectly
+
+CRLSequence ::= SEQUENCE OF CertificateList
+
+Certificate ::= ANY ({ pkcs7_extract_cert }) -- X.509
+
+--
+-- Signer information
+--
+SignerInfos ::= CHOICE {
+ siSet SET OF SignerInfo,
+ siSequence SEQUENCE OF SignerInfo
+}
+
+SignerInfo ::= SEQUENCE {
+ version INTEGER,
+ issuerAndSerialNumber IssuerAndSerialNumber,
+ digestAlgorithm DigestAlgorithmIdentifier ({ pkcs7_sig_note_digest_algo }),
+ authenticatedAttributes CHOICE {
+ aaSet [0] IMPLICIT SetOfAuthenticatedAttribute
+ ({ pkcs7_sig_note_set_of_authattrs }),
+ aaSequence [2] EXPLICIT SEQUENCE OF AuthenticatedAttribute
+ -- Explicit because easier to compute digest on
+ -- sequence of attributes and then reuse encoded
+ -- sequence in aaSequence.
+ } OPTIONAL,
+ digestEncryptionAlgorithm
+ DigestEncryptionAlgorithmIdentifier ({ pkcs7_sig_note_pkey_algo }),
+ encryptedDigest EncryptedDigest,
+ unauthenticatedAttributes CHOICE {
+ uaSet [1] IMPLICIT SET OF UnauthenticatedAttribute,
+ uaSequence [3] IMPLICIT SEQUENCE OF UnauthenticatedAttribute
+ } OPTIONAL
+} ({ pkcs7_note_signed_info })
+
+IssuerAndSerialNumber ::= SEQUENCE {
+ issuer Name ({ pkcs7_sig_note_issuer }),
+ serialNumber CertificateSerialNumber ({ pkcs7_sig_note_serial })
+}
+
+CertificateSerialNumber ::= INTEGER
+
+SetOfAuthenticatedAttribute ::= SET OF AuthenticatedAttribute
+
+AuthenticatedAttribute ::= SEQUENCE {
+ type OBJECT IDENTIFIER ({ pkcs7_note_OID }),
+ values SET OF ANY ({ pkcs7_sig_note_authenticated_attr })
+}
+
+UnauthenticatedAttribute ::= SEQUENCE {
+ type OBJECT IDENTIFIER ({ pkcs7_note_OID }),
+ values SET OF ANY
+}
+
+DigestEncryptionAlgorithmIdentifier ::= SEQUENCE {
+ algorithm OBJECT IDENTIFIER ({ pkcs7_note_OID }),
+ parameters ANY OPTIONAL
+}
+
+EncryptedDigest ::= OCTET STRING ({ pkcs7_sig_note_signature })
+
+---
+--- X.500 Name
+---
+Name ::= SEQUENCE OF RelativeDistinguishedName
+
+RelativeDistinguishedName ::= SET OF AttributeValueAssertion
+
+AttributeValueAssertion ::= SEQUENCE {
+ attributeType OBJECT IDENTIFIER ({ pkcs7_note_OID }),
+ attributeValue ANY
+}
diff --git a/crypto/asymmetric_keys/pkcs7_key_type.c b/crypto/asymmetric_keys/pkcs7_key_type.c
new file mode 100644
index 000000000000..c2091f7bd15d
--- /dev/null
+++ b/crypto/asymmetric_keys/pkcs7_key_type.c
@@ -0,0 +1,99 @@
+/* Testing module to load key from trusted PKCS#7 message
+ *
+ * Copyright (C) 2014 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+
+#define pr_fmt(fmt) "PKCS7key: "fmt
+#include <linux/key.h>
+#include <linux/key-type.h>
+#include <crypto/pkcs7.h>
+#include <keys/user-type.h>
+#include <keys/system_keyring.h>
+#include "pkcs7_parser.h"
+
+/*
+ * Preparse a PKCS#7 wrapped and validated data blob.
+ */
+static int pkcs7_preparse(struct key_preparsed_payload *prep)
+{
+ struct pkcs7_message *pkcs7;
+ const void *data, *saved_prep_data;
+ size_t datalen, saved_prep_datalen;
+ bool trusted;
+ int ret;
+
+ kenter("");
+
+ saved_prep_data = prep->data;
+ saved_prep_datalen = prep->datalen;
+ pkcs7 = pkcs7_parse_message(saved_prep_data, saved_prep_datalen);
+ if (IS_ERR(pkcs7)) {
+ ret = PTR_ERR(pkcs7);
+ goto error;
+ }
+
+ ret = pkcs7_verify(pkcs7);
+ if (ret < 0)
+ goto error_free;
+
+ ret = pkcs7_validate_trust(pkcs7, system_trusted_keyring, &trusted);
+ if (ret < 0)
+ goto error_free;
+ if (!trusted)
+ pr_warn("PKCS#7 message doesn't chain back to a trusted key\n");
+
+ ret = pkcs7_get_content_data(pkcs7, &data, &datalen, false);
+ if (ret < 0)
+ goto error_free;
+
+ prep->data = data;
+ prep->datalen = datalen;
+ ret = user_preparse(prep);
+ prep->data = saved_prep_data;
+ prep->datalen = saved_prep_datalen;
+
+error_free:
+ pkcs7_free_message(pkcs7);
+error:
+ kleave(" = %d", ret);
+ return ret;
+}
+
+/*
+ * user defined keys take an arbitrary string as the description and an
+ * arbitrary blob of data as the payload
+ */
+struct key_type key_type_pkcs7 = {
+ .name = "pkcs7_test",
+ .def_lookup_type = KEYRING_SEARCH_LOOKUP_DIRECT,
+ .preparse = pkcs7_preparse,
+ .free_preparse = user_free_preparse,
+ .instantiate = generic_key_instantiate,
+ .match = user_match,
+ .revoke = user_revoke,
+ .destroy = user_destroy,
+ .describe = user_describe,
+ .read = user_read,
+};
+
+/*
+ * Module stuff
+ */
+static int __init pkcs7_key_init(void)
+{
+ return register_key_type(&key_type_pkcs7);
+}
+
+static void __exit pkcs7_key_cleanup(void)
+{
+ unregister_key_type(&key_type_pkcs7);
+}
+
+module_init(pkcs7_key_init);
+module_exit(pkcs7_key_cleanup);
diff --git a/crypto/asymmetric_keys/pkcs7_parser.c b/crypto/asymmetric_keys/pkcs7_parser.c
new file mode 100644
index 000000000000..42e56aa7d277
--- /dev/null
+++ b/crypto/asymmetric_keys/pkcs7_parser.c
@@ -0,0 +1,396 @@
+/* PKCS#7 parser
+ *
+ * Copyright (C) 2012 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+
+#define pr_fmt(fmt) "PKCS7: "fmt
+#include <linux/kernel.h>
+#include <linux/export.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/oid_registry.h>
+#include "public_key.h"
+#include "pkcs7_parser.h"
+#include "pkcs7-asn1.h"
+
+struct pkcs7_parse_context {
+ struct pkcs7_message *msg; /* Message being constructed */
+ struct pkcs7_signed_info *sinfo; /* SignedInfo being constructed */
+ struct pkcs7_signed_info **ppsinfo;
+ struct x509_certificate *certs; /* Certificate cache */
+ struct x509_certificate **ppcerts;
+ unsigned long data; /* Start of data */
+ enum OID last_oid; /* Last OID encountered */
+ unsigned x509_index;
+ unsigned sinfo_index;
+};
+
+/**
+ * pkcs7_free_message - Free a PKCS#7 message
+ * @pkcs7: The PKCS#7 message to free
+ */
+void pkcs7_free_message(struct pkcs7_message *pkcs7)
+{
+ struct x509_certificate *cert;
+ struct pkcs7_signed_info *sinfo;
+
+ if (pkcs7) {
+ while (pkcs7->certs) {
+ cert = pkcs7->certs;
+ pkcs7->certs = cert->next;
+ x509_free_certificate(cert);
+ }
+ while (pkcs7->crl) {
+ cert = pkcs7->crl;
+ pkcs7->crl = cert->next;
+ x509_free_certificate(cert);
+ }
+ while (pkcs7->signed_infos) {
+ sinfo = pkcs7->signed_infos;
+ pkcs7->signed_infos = sinfo->next;
+ mpi_free(sinfo->sig.mpi[0]);
+ kfree(sinfo->sig.digest);
+ kfree(sinfo);
+ }
+ kfree(pkcs7);
+ }
+}
+EXPORT_SYMBOL_GPL(pkcs7_free_message);
+
+/**
+ * pkcs7_parse_message - Parse a PKCS#7 message
+ * @data: The raw binary ASN.1 encoded message to be parsed
+ * @datalen: The size of the encoded message
+ */
+struct pkcs7_message *pkcs7_parse_message(const void *data, size_t datalen)
+{
+ struct pkcs7_parse_context *ctx;
+ struct pkcs7_message *msg;
+ long ret;
+
+ ret = -ENOMEM;
+ msg = kzalloc(sizeof(struct pkcs7_message), GFP_KERNEL);
+ if (!msg)
+ goto error_no_sig;
+ ctx = kzalloc(sizeof(struct pkcs7_parse_context), GFP_KERNEL);
+ if (!ctx)
+ goto error_no_ctx;
+ ctx->sinfo = kzalloc(sizeof(struct pkcs7_signed_info), GFP_KERNEL);
+ if (!ctx->sinfo)
+ goto error_no_sinfo;
+
+ ctx->msg = msg;
+ ctx->data = (unsigned long)data;
+ ctx->ppcerts = &ctx->certs;
+ ctx->ppsinfo = &ctx->msg->signed_infos;
+
+ /* Attempt to decode the signature */
+ ret = asn1_ber_decoder(&pkcs7_decoder, ctx, data, datalen);
+ if (ret < 0)
+ goto error_decode;
+
+ while (ctx->certs) {
+ struct x509_certificate *cert = ctx->certs;
+ ctx->certs = cert->next;
+ x509_free_certificate(cert);
+ }
+ mpi_free(ctx->sinfo->sig.mpi[0]);
+ kfree(ctx->sinfo->sig.digest);
+ kfree(ctx->sinfo);
+ kfree(ctx);
+ return msg;
+
+error_decode:
+ mpi_free(ctx->sinfo->sig.mpi[0]);
+ kfree(ctx->sinfo->sig.digest);
+ kfree(ctx->sinfo);
+error_no_sinfo:
+ kfree(ctx);
+error_no_ctx:
+ pkcs7_free_message(msg);
+error_no_sig:
+ return ERR_PTR(ret);
+}
+EXPORT_SYMBOL_GPL(pkcs7_parse_message);
+
+/**
+ * pkcs7_get_content_data - Get access to the PKCS#7 content
+ * @pkcs7: The preparsed PKCS#7 message to access
+ * @_data: Place to return a pointer to the data
+ * @_data_len: Place to return the data length
+ * @want_wrapper: True if the ASN.1 object header should be included in the data
+ *
+ * Get access to the data content of the PKCS#7 message, including, optionally,
+ * the header of the ASN.1 object that contains it. Returns -ENODATA if the
+ * data object was missing from the message.
+ */
+int pkcs7_get_content_data(const struct pkcs7_message *pkcs7,
+ const void **_data, size_t *_data_len,
+ bool want_wrapper)
+{
+ size_t wrapper;
+
+ if (!pkcs7->data)
+ return -ENODATA;
+
+ wrapper = want_wrapper ? pkcs7->data_hdrlen : 0;
+ *_data = pkcs7->data - wrapper;
+ *_data_len = pkcs7->data_len + wrapper;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(pkcs7_get_content_data);
+
+/*
+ * Note an OID when we find one for later processing when we know how
+ * to interpret it.
+ */
+int pkcs7_note_OID(void *context, size_t hdrlen,
+ unsigned char tag,
+ const void *value, size_t vlen)
+{
+ struct pkcs7_parse_context *ctx = context;
+
+ ctx->last_oid = look_up_OID(value, vlen);
+ if (ctx->last_oid == OID__NR) {
+ char buffer[50];
+ sprint_oid(value, vlen, buffer, sizeof(buffer));
+ printk("PKCS7: Unknown OID: [%lu] %s\n",
+ (unsigned long)value - ctx->data, buffer);
+ }
+ return 0;
+}
+
+/*
+ * Note the digest algorithm for the signature.
+ */
+int pkcs7_sig_note_digest_algo(void *context, size_t hdrlen,
+ unsigned char tag,
+ const void *value, size_t vlen)
+{
+ struct pkcs7_parse_context *ctx = context;
+
+ switch (ctx->last_oid) {
+ case OID_md4:
+ ctx->sinfo->sig.pkey_hash_algo = HASH_ALGO_MD4;
+ break;
+ case OID_md5:
+ ctx->sinfo->sig.pkey_hash_algo = HASH_ALGO_MD5;
+ break;
+ case OID_sha1:
+ ctx->sinfo->sig.pkey_hash_algo = HASH_ALGO_SHA1;
+ break;
+ case OID_sha256:
+ ctx->sinfo->sig.pkey_hash_algo = HASH_ALGO_SHA256;
+ break;
+ default:
+ printk("Unsupported digest algo: %u\n", ctx->last_oid);
+ return -ENOPKG;
+ }
+ return 0;
+}
+
+/*
+ * Note the public key algorithm for the signature.
+ */
+int pkcs7_sig_note_pkey_algo(void *context, size_t hdrlen,
+ unsigned char tag,
+ const void *value, size_t vlen)
+{
+ struct pkcs7_parse_context *ctx = context;
+
+ switch (ctx->last_oid) {
+ case OID_rsaEncryption:
+ ctx->sinfo->sig.pkey_algo = PKEY_ALGO_RSA;
+ break;
+ default:
+ printk("Unsupported pkey algo: %u\n", ctx->last_oid);
+ return -ENOPKG;
+ }
+ return 0;
+}
+
+/*
+ * Extract a certificate and store it in the context.
+ */
+int pkcs7_extract_cert(void *context, size_t hdrlen,
+ unsigned char tag,
+ const void *value, size_t vlen)
+{
+ struct pkcs7_parse_context *ctx = context;
+ struct x509_certificate *x509;
+
+ if (tag != ((ASN1_UNIV << 6) | ASN1_CONS_BIT | ASN1_SEQ)) {
+ pr_debug("Cert began with tag %02x at %lu\n",
+ tag, (unsigned long)ctx - ctx->data);
+ return -EBADMSG;
+ }
+
+ /* We have to correct for the header so that the X.509 parser can start
+ * from the beginning. Note that since X.509 stipulates DER, there
+ * probably shouldn't be an EOC trailer - but it is in PKCS#7 (which
+ * stipulates BER).
+ */
+ value -= hdrlen;
+ vlen += hdrlen;
+
+ if (((u8*)value)[1] == 0x80)
+ vlen += 2; /* Indefinite length - there should be an EOC */
+
+ x509 = x509_cert_parse(value, vlen);
+ if (IS_ERR(x509))
+ return PTR_ERR(x509);
+
+ pr_debug("Got cert for %s\n", x509->subject);
+ pr_debug("- fingerprint %s\n", x509->fingerprint);
+
+ x509->index = ++ctx->x509_index;
+ *ctx->ppcerts = x509;
+ ctx->ppcerts = &x509->next;
+ return 0;
+}
+
+/*
+ * Save the certificate list
+ */
+int pkcs7_note_certificate_list(void *context, size_t hdrlen,
+ unsigned char tag,
+ const void *value, size_t vlen)
+{
+ struct pkcs7_parse_context *ctx = context;
+
+ pr_devel("Got cert list (%02x)\n", tag);
+
+ *ctx->ppcerts = ctx->msg->certs;
+ ctx->msg->certs = ctx->certs;
+ ctx->certs = NULL;
+ ctx->ppcerts = &ctx->certs;
+ return 0;
+}
+
+/*
+ * Extract the data from the message and store that and its content type OID in
+ * the context.
+ */
+int pkcs7_note_data(void *context, size_t hdrlen,
+ unsigned char tag,
+ const void *value, size_t vlen)
+{
+ struct pkcs7_parse_context *ctx = context;
+
+ pr_debug("Got data\n");
+
+ ctx->msg->data = value;
+ ctx->msg->data_len = vlen;
+ ctx->msg->data_hdrlen = hdrlen;
+ ctx->msg->data_type = ctx->last_oid;
+ return 0;
+}
+
+/*
+ * Parse authenticated attributes
+ */
+int pkcs7_sig_note_authenticated_attr(void *context, size_t hdrlen,
+ unsigned char tag,
+ const void *value, size_t vlen)
+{
+ struct pkcs7_parse_context *ctx = context;
+
+ pr_devel("AuthAttr: %02x %zu [%*ph]\n", tag, vlen, (unsigned)vlen, value);
+
+ switch (ctx->last_oid) {
+ case OID_messageDigest:
+ if (tag != ASN1_OTS)
+ return -EBADMSG;
+ ctx->sinfo->msgdigest = value;
+ ctx->sinfo->msgdigest_len = vlen;
+ return 0;
+ default:
+ return 0;
+ }
+}
+
+/*
+ * Note the set of auth attributes for digestion purposes [RFC2315 9.3]
+ */
+int pkcs7_sig_note_set_of_authattrs(void *context, size_t hdrlen,
+ unsigned char tag,
+ const void *value, size_t vlen)
+{
+ struct pkcs7_parse_context *ctx = context;
+
+ /* We need to switch the 'CONT 0' to a 'SET OF' when we digest */
+ ctx->sinfo->authattrs = value - (hdrlen - 1);
+ ctx->sinfo->authattrs_len = vlen + (hdrlen - 1);
+ return 0;
+}
+
+/*
+ * Note the issuing certificate serial number
+ */
+int pkcs7_sig_note_serial(void *context, size_t hdrlen,
+ unsigned char tag,
+ const void *value, size_t vlen)
+{
+ struct pkcs7_parse_context *ctx = context;
+ ctx->sinfo->raw_serial = value;
+ ctx->sinfo->raw_serial_size = vlen;
+ return 0;
+}
+
+/*
+ * Note the issuer's name
+ */
+int pkcs7_sig_note_issuer(void *context, size_t hdrlen,
+ unsigned char tag,
+ const void *value, size_t vlen)
+{
+ struct pkcs7_parse_context *ctx = context;
+ ctx->sinfo->raw_issuer = value;
+ ctx->sinfo->raw_issuer_size = vlen;
+ return 0;
+}
+
+/*
+ * Note the signature data
+ */
+int pkcs7_sig_note_signature(void *context, size_t hdrlen,
+ unsigned char tag,
+ const void *value, size_t vlen)
+{
+ struct pkcs7_parse_context *ctx = context;
+ MPI mpi;
+
+ BUG_ON(ctx->sinfo->sig.pkey_algo != PKEY_ALGO_RSA);
+
+ mpi = mpi_read_raw_data(value, vlen);
+ if (!mpi)
+ return -ENOMEM;
+
+ ctx->sinfo->sig.mpi[0] = mpi;
+ ctx->sinfo->sig.nr_mpi = 1;
+ return 0;
+}
+
+/*
+ * Note a signature information block
+ */
+int pkcs7_note_signed_info(void *context, size_t hdrlen,
+ unsigned char tag,
+ const void *value, size_t vlen)
+{
+ struct pkcs7_parse_context *ctx = context;
+
+ ctx->sinfo->index = ++ctx->sinfo_index;
+ *ctx->ppsinfo = ctx->sinfo;
+ ctx->ppsinfo = &ctx->sinfo->next;
+ ctx->sinfo = kzalloc(sizeof(struct pkcs7_signed_info), GFP_KERNEL);
+ if (!ctx->sinfo)
+ return -ENOMEM;
+ return 0;
+}
diff --git a/crypto/asymmetric_keys/pkcs7_parser.h b/crypto/asymmetric_keys/pkcs7_parser.h
new file mode 100644
index 000000000000..d25f4d15370f
--- /dev/null
+++ b/crypto/asymmetric_keys/pkcs7_parser.h
@@ -0,0 +1,61 @@
+/* PKCS#7 crypto data parser internal definitions
+ *
+ * Copyright (C) 2012 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+
+#include <linux/oid_registry.h>
+#include <crypto/pkcs7.h>
+#include "x509_parser.h"
+
+#define kenter(FMT, ...) \
+ pr_devel("==> %s("FMT")\n", __func__, ##__VA_ARGS__)
+#define kleave(FMT, ...) \
+ pr_devel("<== %s()"FMT"\n", __func__, ##__VA_ARGS__)
+
+struct pkcs7_signed_info {
+ struct pkcs7_signed_info *next;
+ struct x509_certificate *signer; /* Signing certificate (in msg->certs) */
+ unsigned index;
+ bool trusted;
+
+ /* Message digest - the digest of the Content Data (or NULL) */
+ const void *msgdigest;
+ unsigned msgdigest_len;
+
+ /* Authenticated Attribute data (or NULL) */
+ unsigned authattrs_len;
+ const void *authattrs;
+
+ /* Issuing cert serial number and issuer's name */
+ const void *raw_serial;
+ unsigned raw_serial_size;
+ unsigned raw_issuer_size;
+ const void *raw_issuer;
+
+ /* Message signature.
+ *
+ * This contains the generated digest of _either_ the Content Data or
+ * the Authenticated Attributes [RFC2315 9.3]. If the latter, one of
+ * the attributes contains the digest of the the Content Data within
+ * it.
+ */
+ struct public_key_signature sig;
+};
+
+struct pkcs7_message {
+ struct x509_certificate *certs; /* Certificate list */
+ struct x509_certificate *crl; /* Revocation list */
+ struct pkcs7_signed_info *signed_infos;
+
+ /* Content Data (or NULL) */
+ enum OID data_type; /* Type of Data */
+ size_t data_len; /* Length of Data */
+ size_t data_hdrlen; /* Length of Data ASN.1 header */
+ const void *data; /* Content Data (or 0) */
+};
diff --git a/crypto/asymmetric_keys/pkcs7_trust.c b/crypto/asymmetric_keys/pkcs7_trust.c
new file mode 100644
index 000000000000..b6b045131403
--- /dev/null
+++ b/crypto/asymmetric_keys/pkcs7_trust.c
@@ -0,0 +1,219 @@
+/* Validate the trust chain of a PKCS#7 message.
+ *
+ * Copyright (C) 2012 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+
+#define pr_fmt(fmt) "PKCS7: "fmt
+#include <linux/kernel.h>
+#include <linux/export.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/asn1.h>
+#include <linux/key.h>
+#include <keys/asymmetric-type.h>
+#include "public_key.h"
+#include "pkcs7_parser.h"
+
+/*
+ * Request an asymmetric key.
+ */
+static struct key *pkcs7_request_asymmetric_key(
+ struct key *keyring,
+ const char *signer, size_t signer_len,
+ const char *authority, size_t auth_len)
+{
+ key_ref_t key;
+ char *id;
+
+ kenter(",%zu,,%zu", signer_len, auth_len);
+
+ /* Construct an identifier. */
+ id = kmalloc(signer_len + 2 + auth_len + 1, GFP_KERNEL);
+ if (!id)
+ return ERR_PTR(-ENOMEM);
+
+ memcpy(id, signer, signer_len);
+ id[signer_len + 0] = ':';
+ id[signer_len + 1] = ' ';
+ memcpy(id + signer_len + 2, authority, auth_len);
+ id[signer_len + 2 + auth_len] = 0;
+
+ pr_debug("Look up: \"%s\"\n", id);
+
+ key = keyring_search(make_key_ref(keyring, 1),
+ &key_type_asymmetric, id);
+ if (IS_ERR(key))
+ pr_debug("Request for module key '%s' err %ld\n",
+ id, PTR_ERR(key));
+ kfree(id);
+
+ if (IS_ERR(key)) {
+ switch (PTR_ERR(key)) {
+ /* Hide some search errors */
+ case -EACCES:
+ case -ENOTDIR:
+ case -EAGAIN:
+ return ERR_PTR(-ENOKEY);
+ default:
+ return ERR_CAST(key);
+ }
+ }
+
+ pr_devel("<==%s() = 0 [%x]\n", __func__, key_serial(key_ref_to_ptr(key)));
+ return key_ref_to_ptr(key);
+}
+
+/**
+ * Check the trust on one PKCS#7 SignedInfo block.
+ */
+int pkcs7_validate_trust_one(struct pkcs7_message *pkcs7,
+ struct pkcs7_signed_info *sinfo,
+ struct key *trust_keyring)
+{
+ struct public_key_signature *sig = &sinfo->sig;
+ struct x509_certificate *x509, *last = NULL, *p;
+ struct key *key;
+ bool trusted;
+ int ret;
+
+ kenter(",%u,", sinfo->index);
+
+ for (x509 = sinfo->signer; x509; x509 = x509->signer) {
+ if (x509->seen) {
+ if (x509->verified) {
+ trusted = x509->trusted;
+ goto verified;
+ }
+ kleave(" = -ENOKEY [cached]");
+ return -ENOKEY;
+ }
+ x509->seen = true;
+
+ /* Look to see if this certificate is present in the trusted
+ * keys.
+ */
+ key = pkcs7_request_asymmetric_key(
+ trust_keyring,
+ x509->subject, strlen(x509->subject),
+ x509->fingerprint, strlen(x509->fingerprint));
+ if (!IS_ERR(key))
+ /* One of the X.509 certificates in the PKCS#7 message
+ * is apparently the same as one we already trust.
+ * Verify that the trusted variant can also validate
+ * the signature on the descendant.
+ */
+ goto matched;
+ if (key == ERR_PTR(-ENOMEM))
+ return -ENOMEM;
+
+ /* Self-signed certificates form roots of their own, and if we
+ * don't know them, then we can't accept them.
+ */
+ if (x509->next == x509) {
+ kleave(" = -ENOKEY [unknown self-signed]");
+ return -ENOKEY;
+ }
+
+ might_sleep();
+ last = x509;
+ sig = &last->sig;
+ }
+
+ /* No match - see if the root certificate has a signer amongst the
+ * trusted keys.
+ */
+ if (!last || !last->issuer || !last->authority) {
+ kleave(" = -ENOKEY [no backref]");
+ return -ENOKEY;
+ }
+
+ key = pkcs7_request_asymmetric_key(
+ trust_keyring,
+ last->issuer, strlen(last->issuer),
+ last->authority, strlen(last->authority));
+ if (IS_ERR(key))
+ return PTR_ERR(key) == -ENOMEM ? -ENOMEM : -ENOKEY;
+ x509 = last;
+
+matched:
+ ret = verify_signature(key, sig);
+ trusted = test_bit(KEY_FLAG_TRUSTED, &key->flags);
+ key_put(key);
+ if (ret < 0) {
+ if (ret == -ENOMEM)
+ return ret;
+ kleave(" = -EKEYREJECTED [verify %d]", ret);
+ return -EKEYREJECTED;
+ }
+
+verified:
+ x509->verified = true;
+ for (p = sinfo->signer; p != x509; p = p->signer) {
+ p->verified = true;
+ p->trusted = trusted;
+ }
+ sinfo->trusted = trusted;
+ kleave(" = 0");
+ return 0;
+}
+
+/**
+ * pkcs7_validate_trust - Validate PKCS#7 trust chain
+ * @pkcs7: The PKCS#7 certificate to validate
+ * @trust_keyring: Signing certificates to use as starting points
+ * @_trusted: Set to true if trustworth, false otherwise
+ *
+ * Validate that the certificate chain inside the PKCS#7 message intersects
+ * keys we already know and trust.
+ *
+ * Returns, in order of descending priority:
+ *
+ * (*) -EKEYREJECTED if a signature failed to match for which we have a valid
+ * key, or:
+ *
+ * (*) 0 if at least one signature chain intersects with the keys in the trust
+ * keyring, or:
+ *
+ * (*) -ENOPKG if a suitable crypto module couldn't be found for a check on a
+ * chain.
+ *
+ * (*) -ENOKEY if we couldn't find a match for any of the signature chains in
+ * the message.
+ *
+ * May also return -ENOMEM.
+ */
+int pkcs7_validate_trust(struct pkcs7_message *pkcs7,
+ struct key *trust_keyring,
+ bool *_trusted)
+{
+ struct pkcs7_signed_info *sinfo;
+ struct x509_certificate *p;
+ int cached_ret = 0, ret;
+
+ for (p = pkcs7->certs; p; p = p->next)
+ p->seen = false;
+
+ for (sinfo = pkcs7->signed_infos; sinfo; sinfo = sinfo->next) {
+ ret = pkcs7_validate_trust_one(pkcs7, sinfo, trust_keyring);
+ if (ret < 0) {
+ if (ret == -ENOPKG) {
+ cached_ret = -ENOPKG;
+ } else if (ret == -ENOKEY) {
+ if (cached_ret == 0)
+ cached_ret = -ENOKEY;
+ } else {
+ return ret;
+ }
+ }
+ *_trusted |= sinfo->trusted;
+ }
+
+ return cached_ret;
+}
+EXPORT_SYMBOL_GPL(pkcs7_validate_trust);
diff --git a/crypto/asymmetric_keys/pkcs7_verify.c b/crypto/asymmetric_keys/pkcs7_verify.c
new file mode 100644
index 000000000000..51ff36f3a913
--- /dev/null
+++ b/crypto/asymmetric_keys/pkcs7_verify.c
@@ -0,0 +1,323 @@
+/* Verify the signature on a PKCS#7 message.
+ *
+ * Copyright (C) 2012 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+
+#define pr_fmt(fmt) "PKCS7: "fmt
+#include <linux/kernel.h>
+#include <linux/export.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/asn1.h>
+#include <crypto/hash.h>
+#include "public_key.h"
+#include "pkcs7_parser.h"
+
+/*
+ * Digest the relevant parts of the PKCS#7 data
+ */
+static int pkcs7_digest(struct pkcs7_message *pkcs7,
+ struct pkcs7_signed_info *sinfo)
+{
+ struct crypto_shash *tfm;
+ struct shash_desc *desc;
+ size_t digest_size, desc_size;
+ void *digest;
+ int ret;
+
+ kenter(",%u,%u", sinfo->index, sinfo->sig.pkey_hash_algo);
+
+ if (sinfo->sig.pkey_hash_algo >= PKEY_HASH__LAST ||
+ !hash_algo_name[sinfo->sig.pkey_hash_algo])
+ return -ENOPKG;
+
+ /* Allocate the hashing algorithm we're going to need and find out how
+ * big the hash operational data will be.
+ */
+ tfm = crypto_alloc_shash(hash_algo_name[sinfo->sig.pkey_hash_algo],
+ 0, 0);
+ if (IS_ERR(tfm))
+ return (PTR_ERR(tfm) == -ENOENT) ? -ENOPKG : PTR_ERR(tfm);
+
+ desc_size = crypto_shash_descsize(tfm) + sizeof(*desc);
+ sinfo->sig.digest_size = digest_size = crypto_shash_digestsize(tfm);
+
+ ret = -ENOMEM;
+ digest = kzalloc(digest_size + desc_size, GFP_KERNEL);
+ if (!digest)
+ goto error_no_desc;
+
+ desc = digest + digest_size;
+ desc->tfm = tfm;
+ desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
+
+ /* Digest the message [RFC2315 9.3] */
+ ret = crypto_shash_init(desc);
+ if (ret < 0)
+ goto error;
+ ret = crypto_shash_finup(desc, pkcs7->data, pkcs7->data_len, digest);
+ if (ret < 0)
+ goto error;
+ pr_devel("MsgDigest = [%*ph]\n", 8, digest);
+
+ /* However, if there are authenticated attributes, there must be a
+ * message digest attribute amongst them which corresponds to the
+ * digest we just calculated.
+ */
+ if (sinfo->msgdigest) {
+ u8 tag;
+
+ if (sinfo->msgdigest_len != sinfo->sig.digest_size) {
+ pr_debug("Sig %u: Invalid digest size (%u)\n",
+ sinfo->index, sinfo->msgdigest_len);
+ ret = -EBADMSG;
+ goto error;
+ }
+
+ if (memcmp(digest, sinfo->msgdigest, sinfo->msgdigest_len) != 0) {
+ pr_debug("Sig %u: Message digest doesn't match\n",
+ sinfo->index);
+ ret = -EKEYREJECTED;
+ goto error;
+ }
+
+ /* We then calculate anew, using the authenticated attributes
+ * as the contents of the digest instead. Note that we need to
+ * convert the attributes from a CONT.0 into a SET before we
+ * hash it.
+ */
+ memset(digest, 0, sinfo->sig.digest_size);
+
+ ret = crypto_shash_init(desc);
+ if (ret < 0)
+ goto error;
+ tag = ASN1_CONS_BIT | ASN1_SET;
+ ret = crypto_shash_update(desc, &tag, 1);
+ if (ret < 0)
+ goto error;
+ ret = crypto_shash_finup(desc, sinfo->authattrs,
+ sinfo->authattrs_len, digest);
+ if (ret < 0)
+ goto error;
+ pr_devel("AADigest = [%*ph]\n", 8, digest);
+ }
+
+ sinfo->sig.digest = digest;
+ digest = NULL;
+
+error:
+ kfree(digest);
+error_no_desc:
+ crypto_free_shash(tfm);
+ kleave(" = %d", ret);
+ return ret;
+}
+
+/*
+ * Find the key (X.509 certificate) to use to verify a PKCS#7 message. PKCS#7
+ * uses the issuer's name and the issuing certificate serial number for
+ * matching purposes. These must match the certificate issuer's name (not
+ * subject's name) and the certificate serial number [RFC 2315 6.7].
+ */
+static int pkcs7_find_key(struct pkcs7_message *pkcs7,
+ struct pkcs7_signed_info *sinfo)
+{
+ struct x509_certificate *x509;
+ unsigned certix = 1;
+
+ kenter("%u,%u,%u",
+ sinfo->index, sinfo->raw_serial_size, sinfo->raw_issuer_size);
+
+ for (x509 = pkcs7->certs; x509; x509 = x509->next, certix++) {
+ /* I'm _assuming_ that the generator of the PKCS#7 message will
+ * encode the fields from the X.509 cert in the same way in the
+ * PKCS#7 message - but I can't be 100% sure of that. It's
+ * possible this will need element-by-element comparison.
+ */
+ if (x509->raw_serial_size != sinfo->raw_serial_size ||
+ memcmp(x509->raw_serial, sinfo->raw_serial,
+ sinfo->raw_serial_size) != 0)
+ continue;
+ pr_devel("Sig %u: Found cert serial match X.509[%u]\n",
+ sinfo->index, certix);
+
+ if (x509->raw_issuer_size != sinfo->raw_issuer_size ||
+ memcmp(x509->raw_issuer, sinfo->raw_issuer,
+ sinfo->raw_issuer_size) != 0) {
+ pr_warn("Sig %u: X.509 subject and PKCS#7 issuer don't match\n",
+ sinfo->index);
+ continue;
+ }
+
+ if (x509->pub->pkey_algo != sinfo->sig.pkey_algo) {
+ pr_warn("Sig %u: X.509 algo and PKCS#7 sig algo don't match\n",
+ sinfo->index);
+ continue;
+ }
+
+ sinfo->signer = x509;
+ return 0;
+ }
+ pr_warn("Sig %u: Issuing X.509 cert not found (#%*ph)\n",
+ sinfo->index, sinfo->raw_serial_size, sinfo->raw_serial);
+ return -ENOKEY;
+}
+
+/*
+ * Verify the internal certificate chain as best we can.
+ */
+static int pkcs7_verify_sig_chain(struct pkcs7_message *pkcs7,
+ struct pkcs7_signed_info *sinfo)
+{
+ struct x509_certificate *x509 = sinfo->signer, *p;
+ int ret;
+
+ kenter("");
+
+ for (p = pkcs7->certs; p; p = p->next)
+ p->seen = false;
+
+ for (;;) {
+ pr_debug("verify %s: %s\n", x509->subject, x509->fingerprint);
+ x509->seen = true;
+ ret = x509_get_sig_params(x509);
+ if (ret < 0)
+ return ret;
+
+ if (x509->issuer)
+ pr_debug("- issuer %s\n", x509->issuer);
+ if (x509->authority)
+ pr_debug("- authkeyid %s\n", x509->authority);
+
+ if (!x509->authority ||
+ (x509->subject &&
+ strcmp(x509->subject, x509->issuer) == 0)) {
+ /* If there's no authority certificate specified, then
+ * the certificate must be self-signed and is the root
+ * of the chain. Likewise if the cert is its own
+ * authority.
+ */
+ pr_debug("- no auth?\n");
+ if (x509->raw_subject_size != x509->raw_issuer_size ||
+ memcmp(x509->raw_subject, x509->raw_issuer,
+ x509->raw_issuer_size) != 0)
+ return 0;
+
+ ret = x509_check_signature(x509->pub, x509);
+ if (ret < 0)
+ return ret;
+ x509->signer = x509;
+ pr_debug("- self-signed\n");
+ return 0;
+ }
+
+ /* Look through the X.509 certificates in the PKCS#7 message's
+ * list to see if the next one is there.
+ */
+ pr_debug("- want %s\n", x509->authority);
+ for (p = pkcs7->certs; p; p = p->next) {
+ pr_debug("- cmp [%u] %s\n", p->index, p->fingerprint);
+ if (p->raw_subject_size == x509->raw_issuer_size &&
+ strcmp(p->fingerprint, x509->authority) == 0 &&
+ memcmp(p->raw_subject, x509->raw_issuer,
+ x509->raw_issuer_size) == 0)
+ goto found_issuer;
+ }
+
+ /* We didn't find the root of this chain */
+ pr_debug("- top\n");
+ return 0;
+
+ found_issuer:
+ pr_debug("- issuer %s\n", p->subject);
+ if (p->seen) {
+ pr_warn("Sig %u: X.509 chain contains loop\n",
+ sinfo->index);
+ return 0;
+ }
+ ret = x509_check_signature(p->pub, x509);
+ if (ret < 0)
+ return ret;
+ x509->signer = p;
+ if (x509 == p) {
+ pr_debug("- self-signed\n");
+ return 0;
+ }
+ x509 = p;
+ might_sleep();
+ }
+}
+
+/*
+ * Verify one signed information block from a PKCS#7 message.
+ */
+static int pkcs7_verify_one(struct pkcs7_message *pkcs7,
+ struct pkcs7_signed_info *sinfo)
+{
+ int ret;
+
+ kenter(",%u", sinfo->index);
+
+ /* First of all, digest the data in the PKCS#7 message and the
+ * signed information block
+ */
+ ret = pkcs7_digest(pkcs7, sinfo);
+ if (ret < 0)
+ return ret;
+
+ /* Find the key for the signature */
+ ret = pkcs7_find_key(pkcs7, sinfo);
+ if (ret < 0)
+ return ret;
+
+ pr_devel("Using X.509[%u] for sig %u\n",
+ sinfo->signer->index, sinfo->index);
+
+ /* Verify the PKCS#7 binary against the key */
+ ret = public_key_verify_signature(sinfo->signer->pub, &sinfo->sig);
+ if (ret < 0)
+ return ret;
+
+ pr_devel("Verified signature %u\n", sinfo->index);
+
+ /* Verify the internal certificate chain */
+ return pkcs7_verify_sig_chain(pkcs7, sinfo);
+}
+
+/**
+ * pkcs7_verify - Verify a PKCS#7 message
+ * @pkcs7: The PKCS#7 message to be verified
+ */
+int pkcs7_verify(struct pkcs7_message *pkcs7)
+{
+ struct pkcs7_signed_info *sinfo;
+ struct x509_certificate *x509;
+ int ret, n;
+
+ kenter("");
+
+ for (n = 0, x509 = pkcs7->certs; x509; x509 = x509->next, n++) {
+ ret = x509_get_sig_params(x509);
+ if (ret < 0)
+ return ret;
+ pr_debug("X.509[%u] %s\n", n, x509->authority);
+ }
+
+ for (sinfo = pkcs7->signed_infos; sinfo; sinfo = sinfo->next) {
+ ret = pkcs7_verify_one(pkcs7, sinfo);
+ if (ret < 0) {
+ kleave(" = %d", ret);
+ return ret;
+ }
+ }
+
+ kleave(" = 0");
+ return 0;
+}
+EXPORT_SYMBOL_GPL(pkcs7_verify);
diff --git a/crypto/asymmetric_keys/verify_pefile.c b/crypto/asymmetric_keys/verify_pefile.c
new file mode 100644
index 000000000000..79175e6ea0b2
--- /dev/null
+++ b/crypto/asymmetric_keys/verify_pefile.c
@@ -0,0 +1,457 @@
+/* Parse a signed PE binary
+ *
+ * Copyright (C) 2014 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+
+#define pr_fmt(fmt) "PEFILE: "fmt
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/pe.h>
+#include <linux/asn1.h>
+#include <crypto/pkcs7.h>
+#include <crypto/hash.h>
+#include "verify_pefile.h"
+
+/*
+ * Parse a PE binary.
+ */
+static int pefile_parse_binary(const void *pebuf, unsigned int pelen,
+ struct pefile_context *ctx)
+{
+ const struct mz_hdr *mz = pebuf;
+ const struct pe_hdr *pe;
+ const struct pe32_opt_hdr *pe32;
+ const struct pe32plus_opt_hdr *pe64;
+ const struct data_directory *ddir;
+ const struct data_dirent *dde;
+ const struct section_header *secs, *sec;
+ size_t cursor, datalen = pelen;
+
+ kenter("");
+
+#define chkaddr(base, x, s) \
+ do { \
+ if ((x) < base || (s) >= datalen || (x) > datalen - (s)) \
+ return -ELIBBAD; \
+ } while (0)
+
+ chkaddr(0, 0, sizeof(*mz));
+ if (mz->magic != MZ_MAGIC)
+ return -ELIBBAD;
+ cursor = sizeof(*mz);
+
+ chkaddr(cursor, mz->peaddr, sizeof(*pe));
+ pe = pebuf + mz->peaddr;
+ if (pe->magic != PE_MAGIC)
+ return -ELIBBAD;
+ cursor = mz->peaddr + sizeof(*pe);
+
+ chkaddr(0, cursor, sizeof(pe32->magic));
+ pe32 = pebuf + cursor;
+ pe64 = pebuf + cursor;
+
+ switch (pe32->magic) {
+ case PE_OPT_MAGIC_PE32:
+ chkaddr(0, cursor, sizeof(*pe32));
+ ctx->image_checksum_offset =
+ (unsigned long)&pe32->csum - (unsigned long)pebuf;
+ ctx->header_size = pe32->header_size;
+ cursor += sizeof(*pe32);
+ ctx->n_data_dirents = pe32->data_dirs;
+ break;
+
+ case PE_OPT_MAGIC_PE32PLUS:
+ chkaddr(0, cursor, sizeof(*pe64));
+ ctx->image_checksum_offset =
+ (unsigned long)&pe64->csum - (unsigned long)pebuf;
+ ctx->header_size = pe64->header_size;
+ cursor += sizeof(*pe64);
+ ctx->n_data_dirents = pe64->data_dirs;
+ break;
+
+ default:
+ pr_debug("Unknown PEOPT magic = %04hx\n", pe32->magic);
+ return -ELIBBAD;
+ }
+
+ pr_debug("checksum @ %x\n", ctx->image_checksum_offset);
+ pr_debug("header size = %x\n", ctx->header_size);
+
+ if (cursor >= ctx->header_size || ctx->header_size >= datalen)
+ return -ELIBBAD;
+
+ if (ctx->n_data_dirents > (ctx->header_size - cursor) / sizeof(*dde))
+ return -ELIBBAD;
+
+ ddir = pebuf + cursor;
+ cursor += sizeof(*dde) * ctx->n_data_dirents;
+
+ ctx->cert_dirent_offset =
+ (unsigned long)&ddir->certs - (unsigned long)pebuf;
+ ctx->certs_size = ddir->certs.size;
+
+ if (!ddir->certs.virtual_address || !ddir->certs.size) {
+ pr_debug("Unsigned PE binary\n");
+ return -EKEYREJECTED;
+ }
+
+ chkaddr(ctx->header_size, ddir->certs.virtual_address,
+ ddir->certs.size);
+ ctx->sig_offset = ddir->certs.virtual_address;
+ ctx->sig_len = ddir->certs.size;
+ pr_debug("cert = %x @%x [%*ph]\n",
+ ctx->sig_len, ctx->sig_offset,
+ ctx->sig_len, pebuf + ctx->sig_offset);
+
+ ctx->n_sections = pe->sections;
+ if (ctx->n_sections > (ctx->header_size - cursor) / sizeof(*sec))
+ return -ELIBBAD;
+ ctx->secs = secs = pebuf + cursor;
+
+ return 0;
+}
+
+/*
+ * Check and strip the PE wrapper from around the signature and check that the
+ * remnant looks something like PKCS#7.
+ */
+static int pefile_strip_sig_wrapper(const void *pebuf,
+ struct pefile_context *ctx)
+{
+ struct win_certificate wrapper;
+ const u8 *pkcs7;
+
+ if (ctx->sig_len < sizeof(wrapper)) {
+ pr_debug("Signature wrapper too short\n");
+ return -ELIBBAD;
+ }
+
+ memcpy(&wrapper, pebuf + ctx->sig_offset, sizeof(wrapper));
+ pr_debug("sig wrapper = { %x, %x, %x }\n",
+ wrapper.length, wrapper.revision, wrapper.cert_type);
+
+ /* Both pesign and sbsign round up the length of certificate table
+ * (in optional header data directories) to 8 byte alignment.
+ */
+ if (round_up(wrapper.length, 8) != ctx->sig_len) {
+ pr_debug("Signature wrapper len wrong\n");
+ return -ELIBBAD;
+ }
+ if (wrapper.revision != WIN_CERT_REVISION_2_0) {
+ pr_debug("Signature is not revision 2.0\n");
+ return -ENOTSUPP;
+ }
+ if (wrapper.cert_type != WIN_CERT_TYPE_PKCS_SIGNED_DATA) {
+ pr_debug("Signature certificate type is not PKCS\n");
+ return -ENOTSUPP;
+ }
+
+ /* Looks like actual pkcs signature length is in wrapper->length.
+ * size obtained from data dir entries lists the total size of
+ * certificate table which is also aligned to octawrod boundary.
+ *
+ * So set signature length field appropriately.
+ */
+ ctx->sig_len = wrapper.length;
+ ctx->sig_offset += sizeof(wrapper);
+ ctx->sig_len -= sizeof(wrapper);
+ if (ctx->sig_len == 0) {
+ pr_debug("Signature data missing\n");
+ return -EKEYREJECTED;
+ }
+
+ /* What's left should a PKCS#7 cert */
+ pkcs7 = pebuf + ctx->sig_offset;
+ if (pkcs7[0] == (ASN1_CONS_BIT | ASN1_SEQ)) {
+ if (pkcs7[1] == 0x82 &&
+ pkcs7[2] == (((ctx->sig_len - 4) >> 8) & 0xff) &&
+ pkcs7[3] == ((ctx->sig_len - 4) & 0xff))
+ return 0;
+ if (pkcs7[1] == 0x80)
+ return 0;
+ if (pkcs7[1] > 0x82)
+ return -EMSGSIZE;
+ }
+
+ pr_debug("Signature data not PKCS#7\n");
+ return -ELIBBAD;
+}
+
+/*
+ * Compare two sections for canonicalisation.
+ */
+static int pefile_compare_shdrs(const void *a, const void *b)
+{
+ const struct section_header *shdra = a;
+ const struct section_header *shdrb = b;
+ int rc;
+
+ if (shdra->data_addr > shdrb->data_addr)
+ return 1;
+ if (shdrb->data_addr > shdra->data_addr)
+ return -1;
+
+ if (shdra->virtual_address > shdrb->virtual_address)
+ return 1;
+ if (shdrb->virtual_address > shdra->virtual_address)
+ return -1;
+
+ rc = strcmp(shdra->name, shdrb->name);
+ if (rc != 0)
+ return rc;
+
+ if (shdra->virtual_size > shdrb->virtual_size)
+ return 1;
+ if (shdrb->virtual_size > shdra->virtual_size)
+ return -1;
+
+ if (shdra->raw_data_size > shdrb->raw_data_size)
+ return 1;
+ if (shdrb->raw_data_size > shdra->raw_data_size)
+ return -1;
+
+ return 0;
+}
+
+/*
+ * Load the contents of the PE binary into the digest, leaving out the image
+ * checksum and the certificate data block.
+ */
+static int pefile_digest_pe_contents(const void *pebuf, unsigned int pelen,
+ struct pefile_context *ctx,
+ struct shash_desc *desc)
+{
+ unsigned *canon, tmp, loop, i, hashed_bytes;
+ int ret;
+
+ /* Digest the header and data directory, but leave out the image
+ * checksum and the data dirent for the signature.
+ */
+ ret = crypto_shash_update(desc, pebuf, ctx->image_checksum_offset);
+ if (ret < 0)
+ return ret;
+
+ tmp = ctx->image_checksum_offset + sizeof(uint32_t);
+ ret = crypto_shash_update(desc, pebuf + tmp,
+ ctx->cert_dirent_offset - tmp);
+ if (ret < 0)
+ return ret;
+
+ tmp = ctx->cert_dirent_offset + sizeof(struct data_dirent);
+ ret = crypto_shash_update(desc, pebuf + tmp, ctx->header_size - tmp);
+ if (ret < 0)
+ return ret;
+
+ canon = kcalloc(ctx->n_sections, sizeof(unsigned), GFP_KERNEL);
+ if (!canon)
+ return -ENOMEM;
+
+ /* We have to canonicalise the section table, so we perform an
+ * insertion sort.
+ */
+ canon[0] = 0;
+ for (loop = 1; loop < ctx->n_sections; loop++) {
+ for (i = 0; i < loop; i++) {
+ if (pefile_compare_shdrs(&ctx->secs[canon[i]],
+ &ctx->secs[loop]) > 0) {
+ memmove(&canon[i + 1], &canon[i],
+ (loop - i) * sizeof(canon[0]));
+ break;
+ }
+ }
+ canon[i] = loop;
+ }
+
+ hashed_bytes = ctx->header_size;
+ for (loop = 0; loop < ctx->n_sections; loop++) {
+ i = canon[loop];
+ if (ctx->secs[i].raw_data_size == 0)
+ continue;
+ ret = crypto_shash_update(desc,
+ pebuf + ctx->secs[i].data_addr,
+ ctx->secs[i].raw_data_size);
+ if (ret < 0) {
+ kfree(canon);
+ return ret;
+ }
+ hashed_bytes += ctx->secs[i].raw_data_size;
+ }
+ kfree(canon);
+
+ if (pelen > hashed_bytes) {
+ tmp = hashed_bytes + ctx->certs_size;
+ ret = crypto_shash_update(desc,
+ pebuf + hashed_bytes,
+ pelen - tmp);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+/*
+ * Digest the contents of the PE binary, leaving out the image checksum and the
+ * certificate data block.
+ */
+static int pefile_digest_pe(const void *pebuf, unsigned int pelen,
+ struct pefile_context *ctx)
+{
+ struct crypto_shash *tfm;
+ struct shash_desc *desc;
+ size_t digest_size, desc_size;
+ void *digest;
+ int ret;
+
+ kenter(",%u", ctx->digest_algo);
+
+ /* Allocate the hashing algorithm we're going to need and find out how
+ * big the hash operational data will be.
+ */
+ tfm = crypto_alloc_shash(hash_algo_name[ctx->digest_algo], 0, 0);
+ if (IS_ERR(tfm))
+ return (PTR_ERR(tfm) == -ENOENT) ? -ENOPKG : PTR_ERR(tfm);
+
+ desc_size = crypto_shash_descsize(tfm) + sizeof(*desc);
+ digest_size = crypto_shash_digestsize(tfm);
+
+ if (digest_size != ctx->digest_len) {
+ pr_debug("Digest size mismatch (%zx != %x)\n",
+ digest_size, ctx->digest_len);
+ ret = -EBADMSG;
+ goto error_no_desc;
+ }
+ pr_debug("Digest: desc=%zu size=%zu\n", desc_size, digest_size);
+
+ ret = -ENOMEM;
+ desc = kzalloc(desc_size + digest_size, GFP_KERNEL);
+ if (!desc)
+ goto error_no_desc;
+
+ desc->tfm = tfm;
+ desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
+ ret = crypto_shash_init(desc);
+ if (ret < 0)
+ goto error;
+
+ ret = pefile_digest_pe_contents(pebuf, pelen, ctx, desc);
+ if (ret < 0)
+ goto error;
+
+ digest = (void *)desc + desc_size;
+ ret = crypto_shash_final(desc, digest);
+ if (ret < 0)
+ goto error;
+
+ pr_debug("Digest calc = [%*ph]\n", ctx->digest_len, digest);
+
+ /* Check that the PE file digest matches that in the MSCODE part of the
+ * PKCS#7 certificate.
+ */
+ if (memcmp(digest, ctx->digest, ctx->digest_len) != 0) {
+ pr_debug("Digest mismatch\n");
+ ret = -EKEYREJECTED;
+ } else {
+ pr_debug("The digests match!\n");
+ }
+
+error:
+ kfree(desc);
+error_no_desc:
+ crypto_free_shash(tfm);
+ kleave(" = %d", ret);
+ return ret;
+}
+
+/**
+ * verify_pefile_signature - Verify the signature on a PE binary image
+ * @pebuf: Buffer containing the PE binary image
+ * @pelen: Length of the binary image
+ * @trust_keyring: Signing certificates to use as starting points
+ * @_trusted: Set to true if trustworth, false otherwise
+ *
+ * Validate that the certificate chain inside the PKCS#7 message inside the PE
+ * binary image intersects keys we already know and trust.
+ *
+ * Returns, in order of descending priority:
+ *
+ * (*) -ELIBBAD if the image cannot be parsed, or:
+ *
+ * (*) -EKEYREJECTED if a signature failed to match for which we have a valid
+ * key, or:
+ *
+ * (*) 0 if at least one signature chain intersects with the keys in the trust
+ * keyring, or:
+ *
+ * (*) -ENOPKG if a suitable crypto module couldn't be found for a check on a
+ * chain.
+ *
+ * (*) -ENOKEY if we couldn't find a match for any of the signature chains in
+ * the message.
+ *
+ * May also return -ENOMEM.
+ */
+int verify_pefile_signature(const void *pebuf, unsigned pelen,
+ struct key *trusted_keyring, bool *_trusted)
+{
+ struct pkcs7_message *pkcs7;
+ struct pefile_context ctx;
+ const void *data;
+ size_t datalen;
+ int ret;
+
+ kenter("");
+
+ memset(&ctx, 0, sizeof(ctx));
+ ret = pefile_parse_binary(pebuf, pelen, &ctx);
+ if (ret < 0)
+ return ret;
+
+ ret = pefile_strip_sig_wrapper(pebuf, &ctx);
+ if (ret < 0)
+ return ret;
+
+ pkcs7 = pkcs7_parse_message(pebuf + ctx.sig_offset, ctx.sig_len);
+ if (IS_ERR(pkcs7))
+ return PTR_ERR(pkcs7);
+ ctx.pkcs7 = pkcs7;
+
+ ret = pkcs7_get_content_data(ctx.pkcs7, &data, &datalen, false);
+ if (ret < 0 || datalen == 0) {
+ pr_devel("PKCS#7 message does not contain data\n");
+ ret = -EBADMSG;
+ goto error;
+ }
+
+ ret = mscode_parse(&ctx);
+ if (ret < 0)
+ goto error;
+
+ pr_debug("Digest: %u [%*ph]\n",
+ ctx.digest_len, ctx.digest_len, ctx.digest);
+
+ /* Generate the digest and check against the PKCS7 certificate
+ * contents.
+ */
+ ret = pefile_digest_pe(pebuf, pelen, &ctx);
+ if (ret < 0)
+ goto error;
+
+ ret = pkcs7_verify(pkcs7);
+ if (ret < 0)
+ goto error;
+
+ ret = pkcs7_validate_trust(pkcs7, trusted_keyring, _trusted);
+
+error:
+ pkcs7_free_message(ctx.pkcs7);
+ return ret;
+}
diff --git a/crypto/asymmetric_keys/verify_pefile.h b/crypto/asymmetric_keys/verify_pefile.h
new file mode 100644
index 000000000000..55d5f7ebc45a
--- /dev/null
+++ b/crypto/asymmetric_keys/verify_pefile.h
@@ -0,0 +1,42 @@
+/* PE Binary parser bits
+ *
+ * Copyright (C) 2014 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+
+#include <linux/verify_pefile.h>
+#include <crypto/pkcs7.h>
+#include <crypto/hash_info.h>
+
+struct pefile_context {
+ unsigned header_size;
+ unsigned image_checksum_offset;
+ unsigned cert_dirent_offset;
+ unsigned n_data_dirents;
+ unsigned n_sections;
+ unsigned certs_size;
+ unsigned sig_offset;
+ unsigned sig_len;
+ const struct section_header *secs;
+ struct pkcs7_message *pkcs7;
+
+ /* PKCS#7 MS Individual Code Signing content */
+ const void *digest; /* Digest */
+ unsigned digest_len; /* Digest length */
+ enum hash_algo digest_algo; /* Digest algorithm */
+};
+
+#define kenter(FMT, ...) \
+ pr_devel("==> %s("FMT")\n", __func__, ##__VA_ARGS__)
+#define kleave(FMT, ...) \
+ pr_devel("<== %s()"FMT"\n", __func__, ##__VA_ARGS__)
+
+/*
+ * mscode_parser.c
+ */
+extern int mscode_parse(struct pefile_context *ctx);
diff --git a/crypto/asymmetric_keys/x509.asn1 b/crypto/asymmetric_keys/x509.asn1
index bf32b3dff088..aae0cde414e2 100644
--- a/crypto/asymmetric_keys/x509.asn1
+++ b/crypto/asymmetric_keys/x509.asn1
@@ -6,7 +6,7 @@ Certificate ::= SEQUENCE {
TBSCertificate ::= SEQUENCE {
version [ 0 ] Version DEFAULT,
- serialNumber CertificateSerialNumber,
+ serialNumber CertificateSerialNumber ({ x509_note_serial }),
signature AlgorithmIdentifier ({ x509_note_pkey_algo }),
issuer Name ({ x509_note_issuer }),
validity Validity,
diff --git a/crypto/asymmetric_keys/x509_cert_parser.c b/crypto/asymmetric_keys/x509_cert_parser.c
index 29893162497c..ac72348c186a 100644
--- a/crypto/asymmetric_keys/x509_cert_parser.c
+++ b/crypto/asymmetric_keys/x509_cert_parser.c
@@ -11,6 +11,7 @@
#define pr_fmt(fmt) "X.509: "fmt
#include <linux/kernel.h>
+#include <linux/export.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/oid_registry.h>
@@ -52,6 +53,7 @@ void x509_free_certificate(struct x509_certificate *cert)
kfree(cert);
}
}
+EXPORT_SYMBOL_GPL(x509_free_certificate);
/*
* Parse an X.509 certificate
@@ -97,6 +99,7 @@ error_no_ctx:
error_no_cert:
return ERR_PTR(ret);
}
+EXPORT_SYMBOL_GPL(x509_cert_parse);
/*
* Note an OID when we find one for later processing when we know how
@@ -211,6 +214,19 @@ int x509_note_signature(void *context, size_t hdrlen,
}
/*
+ * Note the certificate serial number
+ */
+int x509_note_serial(void *context, size_t hdrlen,
+ unsigned char tag,
+ const void *value, size_t vlen)
+{
+ struct x509_parse_context *ctx = context;
+ ctx->cert->raw_serial = value;
+ ctx->cert->raw_serial_size = vlen;
+ return 0;
+}
+
+/*
* Note some of the name segments from which we'll fabricate a name.
*/
int x509_extract_name_segment(void *context, size_t hdrlen,
@@ -322,6 +338,8 @@ int x509_note_issuer(void *context, size_t hdrlen,
const void *value, size_t vlen)
{
struct x509_parse_context *ctx = context;
+ ctx->cert->raw_issuer = value;
+ ctx->cert->raw_issuer_size = vlen;
return x509_fabricate_name(ctx, hdrlen, tag, &ctx->cert->issuer, vlen);
}
@@ -330,6 +348,8 @@ int x509_note_subject(void *context, size_t hdrlen,
const void *value, size_t vlen)
{
struct x509_parse_context *ctx = context;
+ ctx->cert->raw_subject = value;
+ ctx->cert->raw_subject_size = vlen;
return x509_fabricate_name(ctx, hdrlen, tag, &ctx->cert->subject, vlen);
}
diff --git a/crypto/asymmetric_keys/x509_parser.h b/crypto/asymmetric_keys/x509_parser.h
index 87d9cc26f630..1b76f207c1f3 100644
--- a/crypto/asymmetric_keys/x509_parser.h
+++ b/crypto/asymmetric_keys/x509_parser.h
@@ -14,7 +14,9 @@
struct x509_certificate {
struct x509_certificate *next;
+ struct x509_certificate *signer; /* Certificate that signed this one */
struct public_key *pub; /* Public key details */
+ struct public_key_signature sig; /* Signature parameters */
char *issuer; /* Name of certificate issuer */
char *subject; /* Name of certificate subject */
char *fingerprint; /* Key fingerprint as hex */
@@ -25,7 +27,16 @@ struct x509_certificate {
unsigned tbs_size; /* Size of signed data */
unsigned raw_sig_size; /* Size of sigature */
const void *raw_sig; /* Signature data */
- struct public_key_signature sig; /* Signature parameters */
+ const void *raw_serial; /* Raw serial number in ASN.1 */
+ unsigned raw_serial_size;
+ unsigned raw_issuer_size;
+ const void *raw_issuer; /* Raw issuer name in ASN.1 */
+ const void *raw_subject; /* Raw subject name in ASN.1 */
+ unsigned raw_subject_size;
+ unsigned index;
+ bool seen; /* Infinite recursion prevention */
+ bool verified;
+ bool trusted;
};
/*
diff --git a/crypto/asymmetric_keys/x509_public_key.c b/crypto/asymmetric_keys/x509_public_key.c
index 927ce755ff67..a0f7cd196c9b 100644
--- a/crypto/asymmetric_keys/x509_public_key.c
+++ b/crypto/asymmetric_keys/x509_public_key.c
@@ -284,7 +284,7 @@ static int x509_key_preparse(struct key_preparsed_payload *prep)
__module_get(public_key_subtype.owner);
prep->type_data[0] = &public_key_subtype;
prep->type_data[1] = cert->fingerprint;
- prep->payload = cert->pub;
+ prep->payload[0] = cert->pub;
prep->description = desc;
prep->quotalen = 100;
diff --git a/fs/nfs/idmap.c b/fs/nfs/idmap.c
index 567983d2c0eb..59b217a3266d 100644
--- a/fs/nfs/idmap.c
+++ b/fs/nfs/idmap.c
@@ -174,7 +174,9 @@ static int nfs_map_numeric_to_string(__u32 id, char *buf, size_t buflen)
static struct key_type key_type_id_resolver = {
.name = "id_resolver",
- .instantiate = user_instantiate,
+ .preparse = user_preparse,
+ .free_preparse = user_free_preparse,
+ .instantiate = generic_key_instantiate,
.match = user_match,
.revoke = user_revoke,
.destroy = user_destroy,
@@ -394,7 +396,9 @@ static const struct rpc_pipe_ops idmap_upcall_ops = {
static struct key_type key_type_id_resolver_legacy = {
.name = "id_legacy",
- .instantiate = user_instantiate,
+ .preparse = user_preparse,
+ .free_preparse = user_free_preparse,
+ .instantiate = generic_key_instantiate,
.match = user_match,
.revoke = user_revoke,
.destroy = user_destroy,
diff --git a/include/crypto/pkcs7.h b/include/crypto/pkcs7.h
new file mode 100644
index 000000000000..691c79172a26
--- /dev/null
+++ b/include/crypto/pkcs7.h
@@ -0,0 +1,36 @@
+/* PKCS#7 crypto data parser
+ *
+ * Copyright (C) 2012 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+
+struct key;
+struct pkcs7_message;
+
+/*
+ * pkcs7_parser.c
+ */
+extern struct pkcs7_message *pkcs7_parse_message(const void *data,
+ size_t datalen);
+extern void pkcs7_free_message(struct pkcs7_message *pkcs7);
+
+extern int pkcs7_get_content_data(const struct pkcs7_message *pkcs7,
+ const void **_data, size_t *_datalen,
+ bool want_wrapper);
+
+/*
+ * pkcs7_trust.c
+ */
+extern int pkcs7_validate_trust(struct pkcs7_message *pkcs7,
+ struct key *trust_keyring,
+ bool *_trusted);
+
+/*
+ * pkcs7_verify.c
+ */
+extern int pkcs7_verify(struct pkcs7_message *pkcs7);
diff --git a/include/keys/big_key-type.h b/include/keys/big_key-type.h
index d69bc8af3292..e0970a578188 100644
--- a/include/keys/big_key-type.h
+++ b/include/keys/big_key-type.h
@@ -16,7 +16,8 @@
extern struct key_type key_type_big_key;
-extern int big_key_instantiate(struct key *key, struct key_preparsed_payload *prep);
+extern int big_key_preparse(struct key_preparsed_payload *prep);
+extern void big_key_free_preparse(struct key_preparsed_payload *prep);
extern void big_key_revoke(struct key *key);
extern void big_key_destroy(struct key *key);
extern void big_key_describe(const struct key *big_key, struct seq_file *m);
diff --git a/include/keys/user-type.h b/include/keys/user-type.h
index 5e452c84f1e6..3ab1873a4bfa 100644
--- a/include/keys/user-type.h
+++ b/include/keys/user-type.h
@@ -37,7 +37,8 @@ extern struct key_type key_type_logon;
struct key_preparsed_payload;
-extern int user_instantiate(struct key *key, struct key_preparsed_payload *prep);
+extern int user_preparse(struct key_preparsed_payload *prep);
+extern void user_free_preparse(struct key_preparsed_payload *prep);
extern int user_update(struct key *key, struct key_preparsed_payload *prep);
extern int user_match(const struct key *key, const void *criterion);
extern void user_revoke(struct key *key);
diff --git a/include/linux/key-type.h b/include/linux/key-type.h
index a74c3a84dfdd..44792ee649de 100644
--- a/include/linux/key-type.h
+++ b/include/linux/key-type.h
@@ -41,10 +41,11 @@ struct key_construction {
struct key_preparsed_payload {
char *description; /* Proposed key description (or NULL) */
void *type_data[2]; /* Private key-type data */
- void *payload; /* Proposed payload */
+ void *payload[2]; /* Proposed payload */
const void *data; /* Raw data */
size_t datalen; /* Raw datalen */
size_t quotalen; /* Quota length for proposed payload */
+ time_t expiry; /* Expiry time of key */
bool trusted; /* True if key is trusted */
};
@@ -159,5 +160,7 @@ static inline int key_negate_and_link(struct key *key,
return key_reject_and_link(key, timeout, ENOKEY, keyring, instkey);
}
+extern int generic_key_instantiate(struct key *key, struct key_preparsed_payload *prep);
+
#endif /* CONFIG_KEYS */
#endif /* _LINUX_KEY_TYPE_H */
diff --git a/include/linux/oid_registry.h b/include/linux/oid_registry.h
index 6926db724258..c2bbf672b84e 100644
--- a/include/linux/oid_registry.h
+++ b/include/linux/oid_registry.h
@@ -52,9 +52,15 @@ enum OID {
OID_md4, /* 1.2.840.113549.2.4 */
OID_md5, /* 1.2.840.113549.2.5 */
- OID_certAuthInfoAccess, /* 1.3.6.1.5.5.7.1.1 */
+ /* Microsoft Authenticode & Software Publishing */
+ OID_msIndirectData, /* 1.3.6.1.4.1.311.2.1.4 */
+ OID_msPeImageDataObjId, /* 1.3.6.1.4.1.311.2.1.15 */
+ OID_msIndividualSPKeyPurpose, /* 1.3.6.1.4.1.311.2.1.21 */
OID_msOutlookExpress, /* 1.3.6.1.4.1.311.16.4 */
+
+ OID_certAuthInfoAccess, /* 1.3.6.1.5.5.7.1.1 */
OID_sha1, /* 1.3.14.3.2.26 */
+ OID_sha256, /* 2.16.840.1.101.3.4.2.1 */
/* Distinguished Name attribute IDs [RFC 2256] */
OID_commonName, /* 2.5.4.3 */
diff --git a/include/linux/pe.h b/include/linux/pe.h
new file mode 100644
index 000000000000..e170b95e763b
--- /dev/null
+++ b/include/linux/pe.h
@@ -0,0 +1,448 @@
+/*
+ * Copyright 2011 Red Hat, Inc.
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Author(s): Peter Jones <pjones@redhat.com>
+ */
+#ifndef __LINUX_PE_H
+#define __LINUX_PE_H
+
+#include <linux/types.h>
+
+#define MZ_MAGIC 0x5a4d /* "MZ" */
+
+struct mz_hdr {
+ uint16_t magic; /* MZ_MAGIC */
+ uint16_t lbsize; /* size of last used block */
+ uint16_t blocks; /* pages in file, 0x3 */
+ uint16_t relocs; /* relocations */
+ uint16_t hdrsize; /* header size in "paragraphs" */
+ uint16_t min_extra_pps; /* .bss */
+ uint16_t max_extra_pps; /* runtime limit for the arena size */
+ uint16_t ss; /* relative stack segment */
+ uint16_t sp; /* initial %sp register */
+ uint16_t checksum; /* word checksum */
+ uint16_t ip; /* initial %ip register */
+ uint16_t cs; /* initial %cs relative to load segment */
+ uint16_t reloc_table_offset; /* offset of the first relocation */
+ uint16_t overlay_num; /* overlay number. set to 0. */
+ uint16_t reserved0[4]; /* reserved */
+ uint16_t oem_id; /* oem identifier */
+ uint16_t oem_info; /* oem specific */
+ uint16_t reserved1[10]; /* reserved */
+ uint32_t peaddr; /* address of pe header */
+ char message[64]; /* message to print */
+};
+
+struct mz_reloc {
+ uint16_t offset;
+ uint16_t segment;
+};
+
+#define PE_MAGIC 0x00004550 /* "PE\0\0" */
+#define PE_OPT_MAGIC_PE32 0x010b
+#define PE_OPT_MAGIC_PE32_ROM 0x0107
+#define PE_OPT_MAGIC_PE32PLUS 0x020b
+
+/* machine type */
+#define IMAGE_FILE_MACHINE_UNKNOWN 0x0000
+#define IMAGE_FILE_MACHINE_AM33 0x01d3
+#define IMAGE_FILE_MACHINE_AMD64 0x8664
+#define IMAGE_FILE_MACHINE_ARM 0x01c0
+#define IMAGE_FILE_MACHINE_ARMV7 0x01c4
+#define IMAGE_FILE_MACHINE_EBC 0x0ebc
+#define IMAGE_FILE_MACHINE_I386 0x014c
+#define IMAGE_FILE_MACHINE_IA64 0x0200
+#define IMAGE_FILE_MACHINE_M32R 0x9041
+#define IMAGE_FILE_MACHINE_MIPS16 0x0266
+#define IMAGE_FILE_MACHINE_MIPSFPU 0x0366
+#define IMAGE_FILE_MACHINE_MIPSFPU16 0x0466
+#define IMAGE_FILE_MACHINE_POWERPC 0x01f0
+#define IMAGE_FILE_MACHINE_POWERPCFP 0x01f1
+#define IMAGE_FILE_MACHINE_R4000 0x0166
+#define IMAGE_FILE_MACHINE_SH3 0x01a2
+#define IMAGE_FILE_MACHINE_SH3DSP 0x01a3
+#define IMAGE_FILE_MACHINE_SH3E 0x01a4
+#define IMAGE_FILE_MACHINE_SH4 0x01a6
+#define IMAGE_FILE_MACHINE_SH5 0x01a8
+#define IMAGE_FILE_MACHINE_THUMB 0x01c2
+#define IMAGE_FILE_MACHINE_WCEMIPSV2 0x0169
+
+/* flags */
+#define IMAGE_FILE_RELOCS_STRIPPED 0x0001
+#define IMAGE_FILE_EXECUTABLE_IMAGE 0x0002
+#define IMAGE_FILE_LINE_NUMS_STRIPPED 0x0004
+#define IMAGE_FILE_LOCAL_SYMS_STRIPPED 0x0008
+#define IMAGE_FILE_AGGRESSIVE_WS_TRIM 0x0010
+#define IMAGE_FILE_LARGE_ADDRESS_AWARE 0x0020
+#define IMAGE_FILE_16BIT_MACHINE 0x0040
+#define IMAGE_FILE_BYTES_REVERSED_LO 0x0080
+#define IMAGE_FILE_32BIT_MACHINE 0x0100
+#define IMAGE_FILE_DEBUG_STRIPPED 0x0200
+#define IMAGE_FILE_REMOVABLE_RUN_FROM_SWAP 0x0400
+#define IMAGE_FILE_NET_RUN_FROM_SWAP 0x0800
+#define IMAGE_FILE_SYSTEM 0x1000
+#define IMAGE_FILE_DLL 0x2000
+#define IMAGE_FILE_UP_SYSTEM_ONLY 0x4000
+#define IMAGE_FILE_BYTES_REVERSED_HI 0x8000
+
+struct pe_hdr {
+ uint32_t magic; /* PE magic */
+ uint16_t machine; /* machine type */
+ uint16_t sections; /* number of sections */
+ uint32_t timestamp; /* time_t */
+ uint32_t symbol_table; /* symbol table offset */
+ uint32_t symbols; /* number of symbols */
+ uint16_t opt_hdr_size; /* size of optional header */
+ uint16_t flags; /* flags */
+};
+
+#define IMAGE_FILE_OPT_ROM_MAGIC 0x107
+#define IMAGE_FILE_OPT_PE32_MAGIC 0x10b
+#define IMAGE_FILE_OPT_PE32_PLUS_MAGIC 0x20b
+
+#define IMAGE_SUBSYSTEM_UNKNOWN 0
+#define IMAGE_SUBSYSTEM_NATIVE 1
+#define IMAGE_SUBSYSTEM_WINDOWS_GUI 2
+#define IMAGE_SUBSYSTEM_WINDOWS_CUI 3
+#define IMAGE_SUBSYSTEM_POSIX_CUI 7
+#define IMAGE_SUBSYSTEM_WINDOWS_CE_GUI 9
+#define IMAGE_SUBSYSTEM_EFI_APPLICATION 10
+#define IMAGE_SUBSYSTEM_EFI_BOOT_SERVICE_DRIVER 11
+#define IMAGE_SUBSYSTEM_EFI_RUNTIME_DRIVER 12
+#define IMAGE_SUBSYSTEM_EFI_ROM_IMAGE 13
+#define IMAGE_SUBSYSTEM_XBOX 14
+
+#define IMAGE_DLL_CHARACTERISTICS_DYNAMIC_BASE 0x0040
+#define IMAGE_DLL_CHARACTERISTICS_FORCE_INTEGRITY 0x0080
+#define IMAGE_DLL_CHARACTERISTICS_NX_COMPAT 0x0100
+#define IMAGE_DLLCHARACTERISTICS_NO_ISOLATION 0x0200
+#define IMAGE_DLLCHARACTERISTICS_NO_SEH 0x0400
+#define IMAGE_DLLCHARACTERISTICS_NO_BIND 0x0800
+#define IMAGE_DLLCHARACTERISTICS_WDM_DRIVER 0x2000
+#define IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE 0x8000
+
+/* the fact that pe32 isn't padded where pe32+ is 64-bit means union won't
+ * work right. vomit. */
+struct pe32_opt_hdr {
+ /* "standard" header */
+ uint16_t magic; /* file type */
+ uint8_t ld_major; /* linker major version */
+ uint8_t ld_minor; /* linker minor version */
+ uint32_t text_size; /* size of text section(s) */
+ uint32_t data_size; /* size of data section(s) */
+ uint32_t bss_size; /* size of bss section(s) */
+ uint32_t entry_point; /* file offset of entry point */
+ uint32_t code_base; /* relative code addr in ram */
+ uint32_t data_base; /* relative data addr in ram */
+ /* "windows" header */
+ uint32_t image_base; /* preferred load address */
+ uint32_t section_align; /* alignment in bytes */
+ uint32_t file_align; /* file alignment in bytes */
+ uint16_t os_major; /* major OS version */
+ uint16_t os_minor; /* minor OS version */
+ uint16_t image_major; /* major image version */
+ uint16_t image_minor; /* minor image version */
+ uint16_t subsys_major; /* major subsystem version */
+ uint16_t subsys_minor; /* minor subsystem version */
+ uint32_t win32_version; /* reserved, must be 0 */
+ uint32_t image_size; /* image size */
+ uint32_t header_size; /* header size rounded up to
+ file_align */
+ uint32_t csum; /* checksum */
+ uint16_t subsys; /* subsystem */
+ uint16_t dll_flags; /* more flags! */
+ uint32_t stack_size_req;/* amt of stack requested */
+ uint32_t stack_size; /* amt of stack required */
+ uint32_t heap_size_req; /* amt of heap requested */
+ uint32_t heap_size; /* amt of heap required */
+ uint32_t loader_flags; /* reserved, must be 0 */
+ uint32_t data_dirs; /* number of data dir entries */
+};
+
+struct pe32plus_opt_hdr {
+ uint16_t magic; /* file type */
+ uint8_t ld_major; /* linker major version */
+ uint8_t ld_minor; /* linker minor version */
+ uint32_t text_size; /* size of text section(s) */
+ uint32_t data_size; /* size of data section(s) */
+ uint32_t bss_size; /* size of bss section(s) */
+ uint32_t entry_point; /* file offset of entry point */
+ uint32_t code_base; /* relative code addr in ram */
+ /* "windows" header */
+ uint64_t image_base; /* preferred load address */
+ uint32_t section_align; /* alignment in bytes */
+ uint32_t file_align; /* file alignment in bytes */
+ uint16_t os_major; /* major OS version */
+ uint16_t os_minor; /* minor OS version */
+ uint16_t image_major; /* major image version */
+ uint16_t image_minor; /* minor image version */
+ uint16_t subsys_major; /* major subsystem version */
+ uint16_t subsys_minor; /* minor subsystem version */
+ uint32_t win32_version; /* reserved, must be 0 */
+ uint32_t image_size; /* image size */
+ uint32_t header_size; /* header size rounded up to
+ file_align */
+ uint32_t csum; /* checksum */
+ uint16_t subsys; /* subsystem */
+ uint16_t dll_flags; /* more flags! */
+ uint64_t stack_size_req;/* amt of stack requested */
+ uint64_t stack_size; /* amt of stack required */
+ uint64_t heap_size_req; /* amt of heap requested */
+ uint64_t heap_size; /* amt of heap required */
+ uint32_t loader_flags; /* reserved, must be 0 */
+ uint32_t data_dirs; /* number of data dir entries */
+};
+
+struct data_dirent {
+ uint32_t virtual_address; /* relative to load address */
+ uint32_t size;
+};
+
+struct data_directory {
+ struct data_dirent exports; /* .edata */
+ struct data_dirent imports; /* .idata */
+ struct data_dirent resources; /* .rsrc */
+ struct data_dirent exceptions; /* .pdata */
+ struct data_dirent certs; /* certs */
+ struct data_dirent base_relocations; /* .reloc */
+ struct data_dirent debug; /* .debug */
+ struct data_dirent arch; /* reservered */
+ struct data_dirent global_ptr; /* global pointer reg. Size=0 */
+ struct data_dirent tls; /* .tls */
+ struct data_dirent load_config; /* load configuration structure */
+ struct data_dirent bound_imports; /* no idea */
+ struct data_dirent import_addrs; /* import address table */
+ struct data_dirent delay_imports; /* delay-load import table */
+ struct data_dirent clr_runtime_hdr; /* .cor (object only) */
+ struct data_dirent reserved;
+};
+
+struct section_header {
+ char name[8]; /* name or "/12\0" string tbl offset */
+ uint32_t virtual_size; /* size of loaded section in ram */
+ uint32_t virtual_address; /* relative virtual address */
+ uint32_t raw_data_size; /* size of the section */
+ uint32_t data_addr; /* file pointer to first page of sec */
+ uint32_t relocs; /* file pointer to relocation entries */
+ uint32_t line_numbers; /* line numbers! */
+ uint16_t num_relocs; /* number of relocations */
+ uint16_t num_lin_numbers; /* srsly. */
+ uint32_t flags;
+};
+
+/* they actually defined 0x00000000 as well, but I think we'll skip that one. */
+#define IMAGE_SCN_RESERVED_0 0x00000001
+#define IMAGE_SCN_RESERVED_1 0x00000002
+#define IMAGE_SCN_RESERVED_2 0x00000004
+#define IMAGE_SCN_TYPE_NO_PAD 0x00000008 /* don't pad - obsolete */
+#define IMAGE_SCN_RESERVED_3 0x00000010
+#define IMAGE_SCN_CNT_CODE 0x00000020 /* .text */
+#define IMAGE_SCN_CNT_INITIALIZED_DATA 0x00000040 /* .data */
+#define IMAGE_SCN_CNT_UNINITIALIZED_DATA 0x00000080 /* .bss */
+#define IMAGE_SCN_LNK_OTHER 0x00000100 /* reserved */
+#define IMAGE_SCN_LNK_INFO 0x00000200 /* .drectve comments */
+#define IMAGE_SCN_RESERVED_4 0x00000400
+#define IMAGE_SCN_LNK_REMOVE 0x00000800 /* .o only - scn to be rm'd*/
+#define IMAGE_SCN_LNK_COMDAT 0x00001000 /* .o only - COMDAT data */
+#define IMAGE_SCN_RESERVED_5 0x00002000 /* spec omits this */
+#define IMAGE_SCN_RESERVED_6 0x00004000 /* spec omits this */
+#define IMAGE_SCN_GPREL 0x00008000 /* global pointer referenced data */
+/* spec lists 0x20000 twice, I suspect they meant 0x10000 for one of them */
+#define IMAGE_SCN_MEM_PURGEABLE 0x00010000 /* reserved for "future" use */
+#define IMAGE_SCN_16BIT 0x00020000 /* reserved for "future" use */
+#define IMAGE_SCN_LOCKED 0x00040000 /* reserved for "future" use */
+#define IMAGE_SCN_PRELOAD 0x00080000 /* reserved for "future" use */
+/* and here they just stuck a 1-byte integer in the middle of a bitfield */
+#define IMAGE_SCN_ALIGN_1BYTES 0x00100000 /* it does what it says on the box */
+#define IMAGE_SCN_ALIGN_2BYTES 0x00200000
+#define IMAGE_SCN_ALIGN_4BYTES 0x00300000
+#define IMAGE_SCN_ALIGN_8BYTES 0x00400000
+#define IMAGE_SCN_ALIGN_16BYTES 0x00500000
+#define IMAGE_SCN_ALIGN_32BYTES 0x00600000
+#define IMAGE_SCN_ALIGN_64BYTES 0x00700000
+#define IMAGE_SCN_ALIGN_128BYTES 0x00800000
+#define IMAGE_SCN_ALIGN_256BYTES 0x00900000
+#define IMAGE_SCN_ALIGN_512BYTES 0x00a00000
+#define IMAGE_SCN_ALIGN_1024BYTES 0x00b00000
+#define IMAGE_SCN_ALIGN_2048BYTES 0x00c00000
+#define IMAGE_SCN_ALIGN_4096BYTES 0x00d00000
+#define IMAGE_SCN_ALIGN_8192BYTES 0x00e00000
+#define IMAGE_SCN_LNK_NRELOC_OVFL 0x01000000 /* extended relocations */
+#define IMAGE_SCN_MEM_DISCARDABLE 0x02000000 /* scn can be discarded */
+#define IMAGE_SCN_MEM_NOT_CACHED 0x04000000 /* cannot be cached */
+#define IMAGE_SCN_MEM_NOT_PAGED 0x08000000 /* not pageable */
+#define IMAGE_SCN_MEM_SHARED 0x10000000 /* can be shared */
+#define IMAGE_SCN_MEM_EXECUTE 0x20000000 /* can be executed as code */
+#define IMAGE_SCN_MEM_READ 0x40000000 /* readable */
+#define IMAGE_SCN_MEM_WRITE 0x80000000 /* writeable */
+
+enum x64_coff_reloc_type {
+ IMAGE_REL_AMD64_ABSOLUTE = 0,
+ IMAGE_REL_AMD64_ADDR64,
+ IMAGE_REL_AMD64_ADDR32,
+ IMAGE_REL_AMD64_ADDR32N,
+ IMAGE_REL_AMD64_REL32,
+ IMAGE_REL_AMD64_REL32_1,
+ IMAGE_REL_AMD64_REL32_2,
+ IMAGE_REL_AMD64_REL32_3,
+ IMAGE_REL_AMD64_REL32_4,
+ IMAGE_REL_AMD64_REL32_5,
+ IMAGE_REL_AMD64_SECTION,
+ IMAGE_REL_AMD64_SECREL,
+ IMAGE_REL_AMD64_SECREL7,
+ IMAGE_REL_AMD64_TOKEN,
+ IMAGE_REL_AMD64_SREL32,
+ IMAGE_REL_AMD64_PAIR,
+ IMAGE_REL_AMD64_SSPAN32,
+};
+
+enum arm_coff_reloc_type {
+ IMAGE_REL_ARM_ABSOLUTE,
+ IMAGE_REL_ARM_ADDR32,
+ IMAGE_REL_ARM_ADDR32N,
+ IMAGE_REL_ARM_BRANCH2,
+ IMAGE_REL_ARM_BRANCH1,
+ IMAGE_REL_ARM_SECTION,
+ IMAGE_REL_ARM_SECREL,
+};
+
+enum sh_coff_reloc_type {
+ IMAGE_REL_SH3_ABSOLUTE,
+ IMAGE_REL_SH3_DIRECT16,
+ IMAGE_REL_SH3_DIRECT32,
+ IMAGE_REL_SH3_DIRECT8,
+ IMAGE_REL_SH3_DIRECT8_WORD,
+ IMAGE_REL_SH3_DIRECT8_LONG,
+ IMAGE_REL_SH3_DIRECT4,
+ IMAGE_REL_SH3_DIRECT4_WORD,
+ IMAGE_REL_SH3_DIRECT4_LONG,
+ IMAGE_REL_SH3_PCREL8_WORD,
+ IMAGE_REL_SH3_PCREL8_LONG,
+ IMAGE_REL_SH3_PCREL12_WORD,
+ IMAGE_REL_SH3_STARTOF_SECTION,
+ IMAGE_REL_SH3_SIZEOF_SECTION,
+ IMAGE_REL_SH3_SECTION,
+ IMAGE_REL_SH3_SECREL,
+ IMAGE_REL_SH3_DIRECT32_NB,
+ IMAGE_REL_SH3_GPREL4_LONG,
+ IMAGE_REL_SH3_TOKEN,
+ IMAGE_REL_SHM_PCRELPT,
+ IMAGE_REL_SHM_REFLO,
+ IMAGE_REL_SHM_REFHALF,
+ IMAGE_REL_SHM_RELLO,
+ IMAGE_REL_SHM_RELHALF,
+ IMAGE_REL_SHM_PAIR,
+ IMAGE_REL_SHM_NOMODE,
+};
+
+enum ppc_coff_reloc_type {
+ IMAGE_REL_PPC_ABSOLUTE,
+ IMAGE_REL_PPC_ADDR64,
+ IMAGE_REL_PPC_ADDR32,
+ IMAGE_REL_PPC_ADDR24,
+ IMAGE_REL_PPC_ADDR16,
+ IMAGE_REL_PPC_ADDR14,
+ IMAGE_REL_PPC_REL24,
+ IMAGE_REL_PPC_REL14,
+ IMAGE_REL_PPC_ADDR32N,
+ IMAGE_REL_PPC_SECREL,
+ IMAGE_REL_PPC_SECTION,
+ IMAGE_REL_PPC_SECREL16,
+ IMAGE_REL_PPC_REFHI,
+ IMAGE_REL_PPC_REFLO,
+ IMAGE_REL_PPC_PAIR,
+ IMAGE_REL_PPC_SECRELLO,
+ IMAGE_REL_PPC_GPREL,
+ IMAGE_REL_PPC_TOKEN,
+};
+
+enum x86_coff_reloc_type {
+ IMAGE_REL_I386_ABSOLUTE,
+ IMAGE_REL_I386_DIR16,
+ IMAGE_REL_I386_REL16,
+ IMAGE_REL_I386_DIR32,
+ IMAGE_REL_I386_DIR32NB,
+ IMAGE_REL_I386_SEG12,
+ IMAGE_REL_I386_SECTION,
+ IMAGE_REL_I386_SECREL,
+ IMAGE_REL_I386_TOKEN,
+ IMAGE_REL_I386_SECREL7,
+ IMAGE_REL_I386_REL32,
+};
+
+enum ia64_coff_reloc_type {
+ IMAGE_REL_IA64_ABSOLUTE,
+ IMAGE_REL_IA64_IMM14,
+ IMAGE_REL_IA64_IMM22,
+ IMAGE_REL_IA64_IMM64,
+ IMAGE_REL_IA64_DIR32,
+ IMAGE_REL_IA64_DIR64,
+ IMAGE_REL_IA64_PCREL21B,
+ IMAGE_REL_IA64_PCREL21M,
+ IMAGE_REL_IA64_PCREL21F,
+ IMAGE_REL_IA64_GPREL22,
+ IMAGE_REL_IA64_LTOFF22,
+ IMAGE_REL_IA64_SECTION,
+ IMAGE_REL_IA64_SECREL22,
+ IMAGE_REL_IA64_SECREL64I,
+ IMAGE_REL_IA64_SECREL32,
+ IMAGE_REL_IA64_DIR32NB,
+ IMAGE_REL_IA64_SREL14,
+ IMAGE_REL_IA64_SREL22,
+ IMAGE_REL_IA64_SREL32,
+ IMAGE_REL_IA64_UREL32,
+ IMAGE_REL_IA64_PCREL60X,
+ IMAGE_REL_IA64_PCREL60B,
+ IMAGE_REL_IA64_PCREL60F,
+ IMAGE_REL_IA64_PCREL60I,
+ IMAGE_REL_IA64_PCREL60M,
+ IMAGE_REL_IA64_IMMGPREL6,
+ IMAGE_REL_IA64_TOKEN,
+ IMAGE_REL_IA64_GPREL32,
+ IMAGE_REL_IA64_ADDEND,
+};
+
+struct coff_reloc {
+ uint32_t virtual_address;
+ uint32_t symbol_table_index;
+ union {
+ enum x64_coff_reloc_type x64_type;
+ enum arm_coff_reloc_type arm_type;
+ enum sh_coff_reloc_type sh_type;
+ enum ppc_coff_reloc_type ppc_type;
+ enum x86_coff_reloc_type x86_type;
+ enum ia64_coff_reloc_type ia64_type;
+ uint16_t data;
+ };
+};
+
+/*
+ * Definitions for the contents of the certs data block
+ */
+#define WIN_CERT_TYPE_PKCS_SIGNED_DATA 0x0002
+#define WIN_CERT_TYPE_EFI_OKCS115 0x0EF0
+#define WIN_CERT_TYPE_EFI_GUID 0x0EF1
+
+#define WIN_CERT_REVISION_1_0 0x0100
+#define WIN_CERT_REVISION_2_0 0x0200
+
+struct win_certificate {
+ uint32_t length;
+ uint16_t revision;
+ uint16_t cert_type;
+};
+
+#endif /* __LINUX_PE_H */
diff --git a/include/linux/verify_pefile.h b/include/linux/verify_pefile.h
new file mode 100644
index 000000000000..ac34819214f9
--- /dev/null
+++ b/include/linux/verify_pefile.h
@@ -0,0 +1,18 @@
+/* Signed PE file verification
+ *
+ * Copyright (C) 2014 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+
+#ifndef _LINUX_VERIFY_PEFILE_H
+#define _LINUX_VERIFY_PEFILE_H
+
+extern int verify_pefile_signature(const void *pebuf, unsigned pelen,
+ struct key *trusted_keyring, bool *_trusted);
+
+#endif /* _LINUX_VERIFY_PEFILE_H */
diff --git a/net/ceph/crypto.c b/net/ceph/crypto.c
index 6e7a236525b6..ffeba8f9dda9 100644
--- a/net/ceph/crypto.c
+++ b/net/ceph/crypto.c
@@ -8,6 +8,7 @@
#include <linux/key-type.h>
#include <keys/ceph-type.h>
+#include <keys/user-type.h>
#include <linux/ceph/decode.h>
#include "crypto.h"
@@ -423,8 +424,7 @@ int ceph_encrypt2(struct ceph_crypto_key *secret, void *dst, size_t *dst_len,
}
}
-static int ceph_key_instantiate(struct key *key,
- struct key_preparsed_payload *prep)
+static int ceph_key_preparse(struct key_preparsed_payload *prep)
{
struct ceph_crypto_key *ckey;
size_t datalen = prep->datalen;
@@ -435,10 +435,6 @@ static int ceph_key_instantiate(struct key *key,
if (datalen <= 0 || datalen > 32767 || !prep->data)
goto err;
- ret = key_payload_reserve(key, datalen);
- if (ret < 0)
- goto err;
-
ret = -ENOMEM;
ckey = kmalloc(sizeof(*ckey), GFP_KERNEL);
if (!ckey)
@@ -450,7 +446,8 @@ static int ceph_key_instantiate(struct key *key,
if (ret < 0)
goto err_ckey;
- key->payload.data = ckey;
+ prep->payload[0] = ckey;
+ prep->quotalen = datalen;
return 0;
err_ckey:
@@ -459,12 +456,15 @@ err:
return ret;
}
-static int ceph_key_match(const struct key *key, const void *description)
+static void ceph_key_free_preparse(struct key_preparsed_payload *prep)
{
- return strcmp(key->description, description) == 0;
+ struct ceph_crypto_key *ckey = prep->payload[0];
+ ceph_crypto_key_destroy(ckey);
+ kfree(ckey);
}
-static void ceph_key_destroy(struct key *key) {
+static void ceph_key_destroy(struct key *key)
+{
struct ceph_crypto_key *ckey = key->payload.data;
ceph_crypto_key_destroy(ckey);
@@ -473,8 +473,10 @@ static void ceph_key_destroy(struct key *key) {
struct key_type key_type_ceph = {
.name = "ceph",
- .instantiate = ceph_key_instantiate,
- .match = ceph_key_match,
+ .preparse = ceph_key_preparse,
+ .free_preparse = ceph_key_free_preparse,
+ .instantiate = generic_key_instantiate,
+ .match = user_match,
.destroy = ceph_key_destroy,
};
diff --git a/net/dns_resolver/dns_key.c b/net/dns_resolver/dns_key.c
index bf8584339048..f380b2c58178 100644
--- a/net/dns_resolver/dns_key.c
+++ b/net/dns_resolver/dns_key.c
@@ -46,7 +46,7 @@ const struct cred *dns_resolver_cache;
#define DNS_ERRORNO_OPTION "dnserror"
/*
- * Instantiate a user defined key for dns_resolver.
+ * Preparse instantiation data for a dns_resolver key.
*
* The data must be a NUL-terminated string, with the NUL char accounted in
* datalen.
@@ -58,17 +58,15 @@ const struct cred *dns_resolver_cache;
* "ip1,ip2,...#foo=bar"
*/
static int
-dns_resolver_instantiate(struct key *key, struct key_preparsed_payload *prep)
+dns_resolver_preparse(struct key_preparsed_payload *prep)
{
struct user_key_payload *upayload;
unsigned long derrno;
int ret;
- size_t datalen = prep->datalen, result_len = 0;
+ int datalen = prep->datalen, result_len = 0;
const char *data = prep->data, *end, *opt;
- kenter("%%%d,%s,'%*.*s',%zu",
- key->serial, key->description,
- (int)datalen, (int)datalen, data, datalen);
+ kenter("'%*.*s',%u", datalen, datalen, data, datalen);
if (datalen <= 1 || !data || data[datalen - 1] != '\0')
return -EINVAL;
@@ -95,8 +93,7 @@ dns_resolver_instantiate(struct key *key, struct key_preparsed_payload *prep)
opt_len = next_opt - opt;
if (!opt_len) {
printk(KERN_WARNING
- "Empty option to dns_resolver key %d\n",
- key->serial);
+ "Empty option to dns_resolver key\n");
return -EINVAL;
}
@@ -125,30 +122,28 @@ dns_resolver_instantiate(struct key *key, struct key_preparsed_payload *prep)
goto bad_option_value;
kdebug("dns error no. = %lu", derrno);
- key->type_data.x[0] = -derrno;
+ prep->type_data[0] = ERR_PTR(-derrno);
continue;
}
bad_option_value:
printk(KERN_WARNING
- "Option '%*.*s' to dns_resolver key %d:"
+ "Option '%*.*s' to dns_resolver key:"
" bad/missing value\n",
- opt_nlen, opt_nlen, opt, key->serial);
+ opt_nlen, opt_nlen, opt);
return -EINVAL;
} while (opt = next_opt + 1, opt < end);
}
/* don't cache the result if we're caching an error saying there's no
* result */
- if (key->type_data.x[0]) {
- kleave(" = 0 [h_error %ld]", key->type_data.x[0]);
+ if (prep->type_data[0]) {
+ kleave(" = 0 [h_error %ld]", PTR_ERR(prep->type_data[0]));
return 0;
}
kdebug("store result");
- ret = key_payload_reserve(key, result_len);
- if (ret < 0)
- return -EINVAL;
+ prep->quotalen = result_len;
upayload = kmalloc(sizeof(*upayload) + result_len + 1, GFP_KERNEL);
if (!upayload) {
@@ -159,13 +154,23 @@ dns_resolver_instantiate(struct key *key, struct key_preparsed_payload *prep)
upayload->datalen = result_len;
memcpy(upayload->data, data, result_len);
upayload->data[result_len] = '\0';
- rcu_assign_pointer(key->payload.data, upayload);
+ prep->payload[0] = upayload;
kleave(" = 0");
return 0;
}
/*
+ * Clean up the preparse data
+ */
+static void dns_resolver_free_preparse(struct key_preparsed_payload *prep)
+{
+ pr_devel("==>%s()\n", __func__);
+
+ kfree(prep->payload[0]);
+}
+
+/*
* The description is of the form "[<type>:]<domain_name>"
*
* The domain name may be a simple name or an absolute domain name (which
@@ -234,7 +239,9 @@ static long dns_resolver_read(const struct key *key,
struct key_type key_type_dns_resolver = {
.name = "dns_resolver",
- .instantiate = dns_resolver_instantiate,
+ .preparse = dns_resolver_preparse,
+ .free_preparse = dns_resolver_free_preparse,
+ .instantiate = generic_key_instantiate,
.match = dns_resolver_match,
.revoke = user_revoke,
.destroy = user_destroy,
diff --git a/net/rxrpc/ar-key.c b/net/rxrpc/ar-key.c
index 0ad080790a32..3907add75932 100644
--- a/net/rxrpc/ar-key.c
+++ b/net/rxrpc/ar-key.c
@@ -26,8 +26,10 @@
#include "ar-internal.h"
static int rxrpc_vet_description_s(const char *);
-static int rxrpc_instantiate(struct key *, struct key_preparsed_payload *);
-static int rxrpc_instantiate_s(struct key *, struct key_preparsed_payload *);
+static int rxrpc_preparse(struct key_preparsed_payload *);
+static int rxrpc_preparse_s(struct key_preparsed_payload *);
+static void rxrpc_free_preparse(struct key_preparsed_payload *);
+static void rxrpc_free_preparse_s(struct key_preparsed_payload *);
static void rxrpc_destroy(struct key *);
static void rxrpc_destroy_s(struct key *);
static void rxrpc_describe(const struct key *, struct seq_file *);
@@ -39,7 +41,9 @@ static long rxrpc_read(const struct key *, char __user *, size_t);
*/
struct key_type key_type_rxrpc = {
.name = "rxrpc",
- .instantiate = rxrpc_instantiate,
+ .preparse = rxrpc_preparse,
+ .free_preparse = rxrpc_free_preparse,
+ .instantiate = generic_key_instantiate,
.match = user_match,
.destroy = rxrpc_destroy,
.describe = rxrpc_describe,
@@ -54,7 +58,9 @@ EXPORT_SYMBOL(key_type_rxrpc);
struct key_type key_type_rxrpc_s = {
.name = "rxrpc_s",
.vet_description = rxrpc_vet_description_s,
- .instantiate = rxrpc_instantiate_s,
+ .preparse = rxrpc_preparse_s,
+ .free_preparse = rxrpc_free_preparse_s,
+ .instantiate = generic_key_instantiate,
.match = user_match,
.destroy = rxrpc_destroy_s,
.describe = rxrpc_describe,
@@ -81,13 +87,13 @@ static int rxrpc_vet_description_s(const char *desc)
* parse an RxKAD type XDR format token
* - the caller guarantees we have at least 4 words
*/
-static int rxrpc_instantiate_xdr_rxkad(struct key *key, const __be32 *xdr,
- unsigned int toklen)
+static int rxrpc_preparse_xdr_rxkad(struct key_preparsed_payload *prep,
+ size_t datalen,
+ const __be32 *xdr, unsigned int toklen)
{
struct rxrpc_key_token *token, **pptoken;
size_t plen;
u32 tktlen;
- int ret;
_enter(",{%x,%x,%x,%x},%u",
ntohl(xdr[0]), ntohl(xdr[1]), ntohl(xdr[2]), ntohl(xdr[3]),
@@ -103,9 +109,7 @@ static int rxrpc_instantiate_xdr_rxkad(struct key *key, const __be32 *xdr,
return -EKEYREJECTED;
plen = sizeof(*token) + sizeof(*token->kad) + tktlen;
- ret = key_payload_reserve(key, key->datalen + plen);
- if (ret < 0)
- return ret;
+ prep->quotalen = datalen + plen;
plen -= sizeof(*token);
token = kzalloc(sizeof(*token), GFP_KERNEL);
@@ -146,16 +150,16 @@ static int rxrpc_instantiate_xdr_rxkad(struct key *key, const __be32 *xdr,
token->kad->ticket[6], token->kad->ticket[7]);
/* count the number of tokens attached */
- key->type_data.x[0]++;
+ prep->type_data[0] = (void *)((unsigned long)prep->type_data[0] + 1);
/* attach the data */
- for (pptoken = (struct rxrpc_key_token **)&key->payload.data;
+ for (pptoken = (struct rxrpc_key_token **)&prep->payload[0];
*pptoken;
pptoken = &(*pptoken)->next)
continue;
*pptoken = token;
- if (token->kad->expiry < key->expiry)
- key->expiry = token->kad->expiry;
+ if (token->kad->expiry < prep->expiry)
+ prep->expiry = token->kad->expiry;
_leave(" = 0");
return 0;
@@ -418,8 +422,9 @@ static int rxrpc_krb5_decode_ticket(u8 **_ticket, u16 *_tktlen,
* parse an RxK5 type XDR format token
* - the caller guarantees we have at least 4 words
*/
-static int rxrpc_instantiate_xdr_rxk5(struct key *key, const __be32 *xdr,
- unsigned int toklen)
+static int rxrpc_preparse_xdr_rxk5(struct key_preparsed_payload *prep,
+ size_t datalen,
+ const __be32 *xdr, unsigned int toklen)
{
struct rxrpc_key_token *token, **pptoken;
struct rxk5_key *rxk5;
@@ -432,9 +437,7 @@ static int rxrpc_instantiate_xdr_rxk5(struct key *key, const __be32 *xdr,
/* reserve some payload space for this subkey - the length of the token
* is a reasonable approximation */
- ret = key_payload_reserve(key, key->datalen + toklen);
- if (ret < 0)
- return ret;
+ prep->quotalen = datalen + toklen;
token = kzalloc(sizeof(*token), GFP_KERNEL);
if (!token)
@@ -520,14 +523,14 @@ static int rxrpc_instantiate_xdr_rxk5(struct key *key, const __be32 *xdr,
if (toklen != 0)
goto inval;
- /* attach the payload to the key */
- for (pptoken = (struct rxrpc_key_token **)&key->payload.data;
+ /* attach the payload */
+ for (pptoken = (struct rxrpc_key_token **)&prep->payload[0];
*pptoken;
pptoken = &(*pptoken)->next)
continue;
*pptoken = token;
- if (token->kad->expiry < key->expiry)
- key->expiry = token->kad->expiry;
+ if (token->kad->expiry < prep->expiry)
+ prep->expiry = token->kad->expiry;
_leave(" = 0");
return 0;
@@ -545,16 +548,17 @@ error:
* attempt to parse the data as the XDR format
* - the caller guarantees we have more than 7 words
*/
-static int rxrpc_instantiate_xdr(struct key *key, const void *data, size_t datalen)
+static int rxrpc_preparse_xdr(struct key_preparsed_payload *prep)
{
- const __be32 *xdr = data, *token;
+ const __be32 *xdr = prep->data, *token;
const char *cp;
unsigned int len, tmp, loop, ntoken, toklen, sec_ix;
+ size_t datalen = prep->datalen;
int ret;
_enter(",{%x,%x,%x,%x},%zu",
ntohl(xdr[0]), ntohl(xdr[1]), ntohl(xdr[2]), ntohl(xdr[3]),
- datalen);
+ prep->datalen);
if (datalen > AFSTOKEN_LENGTH_MAX)
goto not_xdr;
@@ -635,13 +639,13 @@ static int rxrpc_instantiate_xdr(struct key *key, const void *data, size_t datal
switch (sec_ix) {
case RXRPC_SECURITY_RXKAD:
- ret = rxrpc_instantiate_xdr_rxkad(key, xdr, toklen);
+ ret = rxrpc_preparse_xdr_rxkad(prep, datalen, xdr, toklen);
if (ret != 0)
goto error;
break;
case RXRPC_SECURITY_RXK5:
- ret = rxrpc_instantiate_xdr_rxk5(key, xdr, toklen);
+ ret = rxrpc_preparse_xdr_rxk5(prep, datalen, xdr, toklen);
if (ret != 0)
goto error;
break;
@@ -665,8 +669,9 @@ error:
}
/*
- * instantiate an rxrpc defined key
- * data should be of the form:
+ * Preparse an rxrpc defined key.
+ *
+ * Data should be of the form:
* OFFSET LEN CONTENT
* 0 4 key interface version number
* 4 2 security index (type)
@@ -678,7 +683,7 @@ error:
*
* if no data is provided, then a no-security key is made
*/
-static int rxrpc_instantiate(struct key *key, struct key_preparsed_payload *prep)
+static int rxrpc_preparse(struct key_preparsed_payload *prep)
{
const struct rxrpc_key_data_v1 *v1;
struct rxrpc_key_token *token, **pp;
@@ -686,7 +691,7 @@ static int rxrpc_instantiate(struct key *key, struct key_preparsed_payload *prep
u32 kver;
int ret;
- _enter("{%x},,%zu", key_serial(key), prep->datalen);
+ _enter("%zu", prep->datalen);
/* handle a no-security key */
if (!prep->data && prep->datalen == 0)
@@ -694,7 +699,7 @@ static int rxrpc_instantiate(struct key *key, struct key_preparsed_payload *prep
/* determine if the XDR payload format is being used */
if (prep->datalen > 7 * 4) {
- ret = rxrpc_instantiate_xdr(key, prep->data, prep->datalen);
+ ret = rxrpc_preparse_xdr(prep);
if (ret != -EPROTO)
return ret;
}
@@ -743,9 +748,7 @@ static int rxrpc_instantiate(struct key *key, struct key_preparsed_payload *prep
goto error;
plen = sizeof(*token->kad) + v1->ticket_length;
- ret = key_payload_reserve(key, plen + sizeof(*token));
- if (ret < 0)
- goto error;
+ prep->quotalen = plen + sizeof(*token);
ret = -ENOMEM;
token = kzalloc(sizeof(*token), GFP_KERNEL);
@@ -762,15 +765,16 @@ static int rxrpc_instantiate(struct key *key, struct key_preparsed_payload *prep
memcpy(&token->kad->session_key, &v1->session_key, 8);
memcpy(&token->kad->ticket, v1->ticket, v1->ticket_length);
- /* attach the data */
- key->type_data.x[0]++;
+ /* count the number of tokens attached */
+ prep->type_data[0] = (void *)((unsigned long)prep->type_data[0] + 1);
- pp = (struct rxrpc_key_token **)&key->payload.data;
+ /* attach the data */
+ pp = (struct rxrpc_key_token **)&prep->payload[0];
while (*pp)
pp = &(*pp)->next;
*pp = token;
- if (token->kad->expiry < key->expiry)
- key->expiry = token->kad->expiry;
+ if (token->kad->expiry < prep->expiry)
+ prep->expiry = token->kad->expiry;
token = NULL;
ret = 0;
@@ -781,20 +785,55 @@ error:
}
/*
- * instantiate a server secret key
- * data should be a pointer to the 8-byte secret key
+ * Free token list.
*/
-static int rxrpc_instantiate_s(struct key *key,
- struct key_preparsed_payload *prep)
+static void rxrpc_free_token_list(struct rxrpc_key_token *token)
+{
+ struct rxrpc_key_token *next;
+
+ for (; token; token = next) {
+ next = token->next;
+ switch (token->security_index) {
+ case RXRPC_SECURITY_RXKAD:
+ kfree(token->kad);
+ break;
+ case RXRPC_SECURITY_RXK5:
+ if (token->k5)
+ rxrpc_rxk5_free(token->k5);
+ break;
+ default:
+ printk(KERN_ERR "Unknown token type %x on rxrpc key\n",
+ token->security_index);
+ BUG();
+ }
+
+ kfree(token);
+ }
+}
+
+/*
+ * Clean up preparse data.
+ */
+static void rxrpc_free_preparse(struct key_preparsed_payload *prep)
+{
+ rxrpc_free_token_list(prep->payload[0]);
+}
+
+/*
+ * Preparse a server secret key.
+ *
+ * The data should be the 8-byte secret key.
+ */
+static int rxrpc_preparse_s(struct key_preparsed_payload *prep)
{
struct crypto_blkcipher *ci;
- _enter("{%x},,%zu", key_serial(key), prep->datalen);
+ _enter("%zu", prep->datalen);
if (prep->datalen != 8)
return -EINVAL;
- memcpy(&key->type_data, prep->data, 8);
+ memcpy(&prep->type_data, prep->data, 8);
ci = crypto_alloc_blkcipher("pcbc(des)", 0, CRYPTO_ALG_ASYNC);
if (IS_ERR(ci)) {
@@ -805,36 +844,26 @@ static int rxrpc_instantiate_s(struct key *key,
if (crypto_blkcipher_setkey(ci, prep->data, 8) < 0)
BUG();
- key->payload.data = ci;
+ prep->payload[0] = ci;
_leave(" = 0");
return 0;
}
/*
+ * Clean up preparse data.
+ */
+static void rxrpc_free_preparse_s(struct key_preparsed_payload *prep)
+{
+ if (prep->payload[0])
+ crypto_free_blkcipher(prep->payload[0]);
+}
+
+/*
* dispose of the data dangling from the corpse of a rxrpc key
*/
static void rxrpc_destroy(struct key *key)
{
- struct rxrpc_key_token *token;
-
- while ((token = key->payload.data)) {
- key->payload.data = token->next;
- switch (token->security_index) {
- case RXRPC_SECURITY_RXKAD:
- kfree(token->kad);
- break;
- case RXRPC_SECURITY_RXK5:
- if (token->k5)
- rxrpc_rxk5_free(token->k5);
- break;
- default:
- printk(KERN_ERR "Unknown token type %x on rxrpc key\n",
- token->security_index);
- BUG();
- }
-
- kfree(token);
- }
+ rxrpc_free_token_list(key->payload.data);
}
/*
diff --git a/security/keys/big_key.c b/security/keys/big_key.c
index 8137b27d641d..c2f91a0cf889 100644
--- a/security/keys/big_key.c
+++ b/security/keys/big_key.c
@@ -34,7 +34,9 @@ MODULE_LICENSE("GPL");
struct key_type key_type_big_key = {
.name = "big_key",
.def_lookup_type = KEYRING_SEARCH_LOOKUP_DIRECT,
- .instantiate = big_key_instantiate,
+ .preparse = big_key_preparse,
+ .free_preparse = big_key_free_preparse,
+ .instantiate = generic_key_instantiate,
.match = user_match,
.revoke = big_key_revoke,
.destroy = big_key_destroy,
@@ -43,11 +45,11 @@ struct key_type key_type_big_key = {
};
/*
- * Instantiate a big key
+ * Preparse a big key
*/
-int big_key_instantiate(struct key *key, struct key_preparsed_payload *prep)
+int big_key_preparse(struct key_preparsed_payload *prep)
{
- struct path *path = (struct path *)&key->payload.data2;
+ struct path *path = (struct path *)&prep->payload;
struct file *file;
ssize_t written;
size_t datalen = prep->datalen;
@@ -58,11 +60,9 @@ int big_key_instantiate(struct key *key, struct key_preparsed_payload *prep)
goto error;
/* Set an arbitrary quota */
- ret = key_payload_reserve(key, 16);
- if (ret < 0)
- goto error;
+ prep->quotalen = 16;
- key->type_data.x[1] = datalen;
+ prep->type_data[1] = (void *)(unsigned long)datalen;
if (datalen > BIG_KEY_FILE_THRESHOLD) {
/* Create a shmem file to store the data in. This will permit the data
@@ -73,7 +73,7 @@ int big_key_instantiate(struct key *key, struct key_preparsed_payload *prep)
file = shmem_kernel_file_setup("", datalen, 0);
if (IS_ERR(file)) {
ret = PTR_ERR(file);
- goto err_quota;
+ goto error;
}
written = kernel_write(file, prep->data, prep->datalen, 0);
@@ -93,24 +93,33 @@ int big_key_instantiate(struct key *key, struct key_preparsed_payload *prep)
} else {
/* Just store the data in a buffer */
void *data = kmalloc(datalen, GFP_KERNEL);
- if (!data) {
- ret = -ENOMEM;
- goto err_quota;
- }
+ if (!data)
+ return -ENOMEM;
- key->payload.data = memcpy(data, prep->data, prep->datalen);
+ prep->payload[0] = memcpy(data, prep->data, prep->datalen);
}
return 0;
err_fput:
fput(file);
-err_quota:
- key_payload_reserve(key, 0);
error:
return ret;
}
/*
+ * Clear preparsement.
+ */
+void big_key_free_preparse(struct key_preparsed_payload *prep)
+{
+ if (prep->datalen > BIG_KEY_FILE_THRESHOLD) {
+ struct path *path = (struct path *)&prep->payload;
+ path_put(path);
+ } else {
+ kfree(prep->payload[0]);
+ }
+}
+
+/*
* dispose of the links from a revoked keyring
* - called with the key sem write-locked
*/
diff --git a/security/keys/encrypted-keys/encrypted.c b/security/keys/encrypted-keys/encrypted.c
index 5fe443d120af..d252c5704f8a 100644
--- a/security/keys/encrypted-keys/encrypted.c
+++ b/security/keys/encrypted-keys/encrypted.c
@@ -811,7 +811,7 @@ static int encrypted_instantiate(struct key *key,
goto out;
}
- rcu_assign_keypointer(key, epayload);
+ prep->payload[0] = epayload;
out:
kfree(datablob);
return ret;
diff --git a/security/keys/key.c b/security/keys/key.c
index 2048a110e7f1..b90a68c4e2c4 100644
--- a/security/keys/key.c
+++ b/security/keys/key.c
@@ -437,6 +437,11 @@ static int __key_instantiate_and_link(struct key *key,
/* disable the authorisation key */
if (authkey)
key_revoke(authkey);
+
+ if (prep->expiry != TIME_T_MAX) {
+ key->expiry = prep->expiry;
+ key_schedule_gc(prep->expiry + key_gc_delay);
+ }
}
}
@@ -479,6 +484,7 @@ int key_instantiate_and_link(struct key *key,
prep.data = data;
prep.datalen = datalen;
prep.quotalen = key->type->def_datalen;
+ prep.expiry = TIME_T_MAX;
if (key->type->preparse) {
ret = key->type->preparse(&prep);
if (ret < 0)
@@ -488,7 +494,7 @@ int key_instantiate_and_link(struct key *key,
if (keyring) {
ret = __key_link_begin(keyring, &key->index_key, &edit);
if (ret < 0)
- goto error_free_preparse;
+ goto error;
}
ret = __key_instantiate_and_link(key, &prep, keyring, authkey, &edit);
@@ -496,10 +502,9 @@ int key_instantiate_and_link(struct key *key,
if (keyring)
__key_link_end(keyring, &key->index_key, edit);
-error_free_preparse:
+error:
if (key->type->preparse)
key->type->free_preparse(&prep);
-error:
return ret;
}
@@ -811,11 +816,12 @@ key_ref_t key_create_or_update(key_ref_t keyring_ref,
prep.datalen = plen;
prep.quotalen = index_key.type->def_datalen;
prep.trusted = flags & KEY_ALLOC_TRUSTED;
+ prep.expiry = TIME_T_MAX;
if (index_key.type->preparse) {
ret = index_key.type->preparse(&prep);
if (ret < 0) {
key_ref = ERR_PTR(ret);
- goto error_put_type;
+ goto error_free_prep;
}
if (!index_key.description)
index_key.description = prep.description;
@@ -941,6 +947,7 @@ int key_update(key_ref_t key_ref, const void *payload, size_t plen)
prep.data = payload;
prep.datalen = plen;
prep.quotalen = key->type->def_datalen;
+ prep.expiry = TIME_T_MAX;
if (key->type->preparse) {
ret = key->type->preparse(&prep);
if (ret < 0)
@@ -956,9 +963,9 @@ int key_update(key_ref_t key_ref, const void *payload, size_t plen)
up_write(&key->sem);
+error:
if (key->type->preparse)
key->type->free_preparse(&prep);
-error:
return ret;
}
EXPORT_SYMBOL(key_update);
@@ -1024,6 +1031,38 @@ void key_invalidate(struct key *key)
EXPORT_SYMBOL(key_invalidate);
/**
+ * generic_key_instantiate - Simple instantiation of a key from preparsed data
+ * @key: The key to be instantiated
+ * @prep: The preparsed data to load.
+ *
+ * Instantiate a key from preparsed data. We assume we can just copy the data
+ * in directly and clear the old pointers.
+ *
+ * This can be pointed to directly by the key type instantiate op pointer.
+ */
+int generic_key_instantiate(struct key *key, struct key_preparsed_payload *prep)
+{
+ int ret;
+
+ pr_devel("==>%s()\n", __func__);
+
+ ret = key_payload_reserve(key, prep->quotalen);
+ if (ret == 0) {
+ key->type_data.p[0] = prep->type_data[0];
+ key->type_data.p[1] = prep->type_data[1];
+ rcu_assign_keypointer(key, prep->payload[0]);
+ key->payload.data2[1] = prep->payload[1];
+ prep->type_data[0] = NULL;
+ prep->type_data[1] = NULL;
+ prep->payload[0] = NULL;
+ prep->payload[1] = NULL;
+ }
+ pr_devel("<==%s() = %d\n", __func__, ret);
+ return ret;
+}
+EXPORT_SYMBOL(generic_key_instantiate);
+
+/**
* register_key_type - Register a type of key.
* @ktype: The new key type.
*
diff --git a/security/keys/keyring.c b/security/keys/keyring.c
index 9cf2575f0d97..8314a7d2104d 100644
--- a/security/keys/keyring.c
+++ b/security/keys/keyring.c
@@ -73,6 +73,8 @@ static inline unsigned keyring_hash(const char *desc)
* can be treated as ordinary keys in addition to having their own special
* operations.
*/
+static int keyring_preparse(struct key_preparsed_payload *prep);
+static void keyring_free_preparse(struct key_preparsed_payload *prep);
static int keyring_instantiate(struct key *keyring,
struct key_preparsed_payload *prep);
static void keyring_revoke(struct key *keyring);
@@ -84,6 +86,8 @@ static long keyring_read(const struct key *keyring,
struct key_type key_type_keyring = {
.name = "keyring",
.def_datalen = 0,
+ .preparse = keyring_preparse,
+ .free_preparse = keyring_free_preparse,
.instantiate = keyring_instantiate,
.match = user_match,
.revoke = keyring_revoke,
@@ -123,6 +127,21 @@ static void keyring_publish_name(struct key *keyring)
}
/*
+ * Preparse a keyring payload
+ */
+static int keyring_preparse(struct key_preparsed_payload *prep)
+{
+ return prep->datalen != 0 ? -EINVAL : 0;
+}
+
+/*
+ * Free a preparse of a user defined key payload
+ */
+static void keyring_free_preparse(struct key_preparsed_payload *prep)
+{
+}
+
+/*
* Initialise a keyring.
*
* Returns 0 on success, -EINVAL if given any data.
@@ -130,17 +149,10 @@ static void keyring_publish_name(struct key *keyring)
static int keyring_instantiate(struct key *keyring,
struct key_preparsed_payload *prep)
{
- int ret;
-
- ret = -EINVAL;
- if (prep->datalen == 0) {
- assoc_array_init(&keyring->keys);
- /* make the keyring available by name if it has one */
- keyring_publish_name(keyring);
- ret = 0;
- }
-
- return ret;
+ assoc_array_init(&keyring->keys);
+ /* make the keyring available by name if it has one */
+ keyring_publish_name(keyring);
+ return 0;
}
/*
diff --git a/security/keys/request_key_auth.c b/security/keys/request_key_auth.c
index 7495a93b4b90..842e6f410d50 100644
--- a/security/keys/request_key_auth.c
+++ b/security/keys/request_key_auth.c
@@ -20,6 +20,8 @@
#include "internal.h"
#include <keys/user-type.h>
+static int request_key_auth_preparse(struct key_preparsed_payload *);
+static void request_key_auth_free_preparse(struct key_preparsed_payload *);
static int request_key_auth_instantiate(struct key *,
struct key_preparsed_payload *);
static void request_key_auth_describe(const struct key *, struct seq_file *);
@@ -33,6 +35,8 @@ static long request_key_auth_read(const struct key *, char __user *, size_t);
struct key_type key_type_request_key_auth = {
.name = ".request_key_auth",
.def_datalen = sizeof(struct request_key_auth),
+ .preparse = request_key_auth_preparse,
+ .free_preparse = request_key_auth_free_preparse,
.instantiate = request_key_auth_instantiate,
.describe = request_key_auth_describe,
.revoke = request_key_auth_revoke,
@@ -40,6 +44,15 @@ struct key_type key_type_request_key_auth = {
.read = request_key_auth_read,
};
+int request_key_auth_preparse(struct key_preparsed_payload *prep)
+{
+ return 0;
+}
+
+void request_key_auth_free_preparse(struct key_preparsed_payload *prep)
+{
+}
+
/*
* Instantiate a request-key authorisation key.
*/
diff --git a/security/keys/user_defined.c b/security/keys/user_defined.c
index faa2caeb593f..eee340011f2b 100644
--- a/security/keys/user_defined.c
+++ b/security/keys/user_defined.c
@@ -27,7 +27,9 @@ static int logon_vet_description(const char *desc);
struct key_type key_type_user = {
.name = "user",
.def_lookup_type = KEYRING_SEARCH_LOOKUP_DIRECT,
- .instantiate = user_instantiate,
+ .preparse = user_preparse,
+ .free_preparse = user_free_preparse,
+ .instantiate = generic_key_instantiate,
.update = user_update,
.match = user_match,
.revoke = user_revoke,
@@ -47,7 +49,9 @@ EXPORT_SYMBOL_GPL(key_type_user);
struct key_type key_type_logon = {
.name = "logon",
.def_lookup_type = KEYRING_SEARCH_LOOKUP_DIRECT,
- .instantiate = user_instantiate,
+ .preparse = user_preparse,
+ .free_preparse = user_free_preparse,
+ .instantiate = generic_key_instantiate,
.update = user_update,
.match = user_match,
.revoke = user_revoke,
@@ -58,38 +62,37 @@ struct key_type key_type_logon = {
EXPORT_SYMBOL_GPL(key_type_logon);
/*
- * instantiate a user defined key
+ * Preparse a user defined key payload
*/
-int user_instantiate(struct key *key, struct key_preparsed_payload *prep)
+int user_preparse(struct key_preparsed_payload *prep)
{
struct user_key_payload *upayload;
size_t datalen = prep->datalen;
- int ret;
- ret = -EINVAL;
if (datalen <= 0 || datalen > 32767 || !prep->data)
- goto error;
-
- ret = key_payload_reserve(key, datalen);
- if (ret < 0)
- goto error;
+ return -EINVAL;
- ret = -ENOMEM;
upayload = kmalloc(sizeof(*upayload) + datalen, GFP_KERNEL);
if (!upayload)
- goto error;
+ return -ENOMEM;
/* attach the data */
+ prep->quotalen = datalen;
+ prep->payload[0] = upayload;
upayload->datalen = datalen;
memcpy(upayload->data, prep->data, datalen);
- rcu_assign_keypointer(key, upayload);
- ret = 0;
-
-error:
- return ret;
+ return 0;
}
+EXPORT_SYMBOL_GPL(user_preparse);
-EXPORT_SYMBOL_GPL(user_instantiate);
+/*
+ * Free a preparse of a user defined key payload
+ */
+void user_free_preparse(struct key_preparsed_payload *prep)
+{
+ kfree(prep->payload[0]);
+}
+EXPORT_SYMBOL_GPL(user_free_preparse);
/*
* update a user defined key