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authorTadeusz Struk <tadeusz.struk@intel.com>2015-06-16 10:30:55 -0700
committerHerbert Xu <herbert@gondor.apana.org.au>2015-06-17 17:03:14 +0800
commit3c339ab83fc09d9d91fb7e8b4a60e8ddc91de417 (patch)
treeb9e262f57e0acad14b05b0545dfd5c690f78f356 /crypto
parentc2b7b20aedfa10de3634877c3e4b7bc9a7d6461e (diff)
downloadlinux-stericsson-3c339ab83fc09d9d91fb7e8b4a60e8ddc91de417.tar.gz
crypto: akcipher - add PKE API
Add Public Key Encryption API. Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com> Made CRYPTO_AKCIPHER invisible like other type config options. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto')
-rw-r--r--crypto/Kconfig9
-rw-r--r--crypto/Makefile1
-rw-r--r--crypto/akcipher.c117
-rw-r--r--crypto/crypto_user.c22
4 files changed, 149 insertions, 0 deletions
diff --git a/crypto/Kconfig b/crypto/Kconfig
index f6fc054eb2d1..eb0aca45d430 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -91,6 +91,15 @@ config CRYPTO_PCOMP2
tristate
select CRYPTO_ALGAPI2
+config CRYPTO_AKCIPHER2
+ tristate
+ select CRYPTO_ALGAPI2
+
+config CRYPTO_AKCIPHER
+ tristate
+ select CRYPTO_AKCIPHER2
+ select CRYPTO_ALGAPI
+
config CRYPTO_MANAGER
tristate "Cryptographic algorithm manager"
select CRYPTO_MANAGER2
diff --git a/crypto/Makefile b/crypto/Makefile
index c84203572477..1ed382df7db9 100644
--- a/crypto/Makefile
+++ b/crypto/Makefile
@@ -28,6 +28,7 @@ crypto_hash-y += shash.o
obj-$(CONFIG_CRYPTO_HASH2) += crypto_hash.o
obj-$(CONFIG_CRYPTO_PCOMP2) += pcompress.o
+obj-$(CONFIG_CRYPTO_AKCIPHER2) += akcipher.o
cryptomgr-y := algboss.o testmgr.o
diff --git a/crypto/akcipher.c b/crypto/akcipher.c
new file mode 100644
index 000000000000..d7986414814e
--- /dev/null
+++ b/crypto/akcipher.c
@@ -0,0 +1,117 @@
+/*
+ * Public Key Encryption
+ *
+ * Copyright (c) 2015, Intel Corporation
+ * Authors: Tadeusz Struk <tadeusz.struk@intel.com>
+ *
+ * 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; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ */
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/crypto.h>
+#include <crypto/algapi.h>
+#include <linux/cryptouser.h>
+#include <net/netlink.h>
+#include <crypto/akcipher.h>
+#include <crypto/public_key.h>
+#include "internal.h"
+
+#ifdef CONFIG_NET
+static int crypto_akcipher_report(struct sk_buff *skb, struct crypto_alg *alg)
+{
+ struct crypto_report_akcipher rakcipher;
+
+ strncpy(rakcipher.type, "akcipher", sizeof(rakcipher.type));
+
+ if (nla_put(skb, CRYPTOCFGA_REPORT_AKCIPHER,
+ sizeof(struct crypto_report_akcipher), &rakcipher))
+ goto nla_put_failure;
+ return 0;
+
+nla_put_failure:
+ return -EMSGSIZE;
+}
+#else
+static int crypto_akcipher_report(struct sk_buff *skb, struct crypto_alg *alg)
+{
+ return -ENOSYS;
+}
+#endif
+
+static void crypto_akcipher_show(struct seq_file *m, struct crypto_alg *alg)
+ __attribute__ ((unused));
+
+static void crypto_akcipher_show(struct seq_file *m, struct crypto_alg *alg)
+{
+ seq_puts(m, "type : akcipher\n");
+}
+
+static void crypto_akcipher_exit_tfm(struct crypto_tfm *tfm)
+{
+ struct crypto_akcipher *akcipher = __crypto_akcipher_tfm(tfm);
+ struct akcipher_alg *alg = crypto_akcipher_alg(akcipher);
+
+ alg->exit(akcipher);
+}
+
+static int crypto_akcipher_init_tfm(struct crypto_tfm *tfm)
+{
+ struct crypto_akcipher *akcipher = __crypto_akcipher_tfm(tfm);
+ struct akcipher_alg *alg = crypto_akcipher_alg(akcipher);
+
+ if (alg->exit)
+ akcipher->base.exit = crypto_akcipher_exit_tfm;
+
+ if (alg->init)
+ return alg->init(akcipher);
+
+ return 0;
+}
+
+static const struct crypto_type crypto_akcipher_type = {
+ .extsize = crypto_alg_extsize,
+ .init_tfm = crypto_akcipher_init_tfm,
+#ifdef CONFIG_PROC_FS
+ .show = crypto_akcipher_show,
+#endif
+ .report = crypto_akcipher_report,
+ .maskclear = ~CRYPTO_ALG_TYPE_MASK,
+ .maskset = CRYPTO_ALG_TYPE_MASK,
+ .type = CRYPTO_ALG_TYPE_AKCIPHER,
+ .tfmsize = offsetof(struct crypto_akcipher, base),
+};
+
+struct crypto_akcipher *crypto_alloc_akcipher(const char *alg_name, u32 type,
+ u32 mask)
+{
+ return crypto_alloc_tfm(alg_name, &crypto_akcipher_type, type, mask);
+}
+EXPORT_SYMBOL_GPL(crypto_alloc_akcipher);
+
+int crypto_register_akcipher(struct akcipher_alg *alg)
+{
+ struct crypto_alg *base = &alg->base;
+
+ base->cra_type = &crypto_akcipher_type;
+ base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
+ base->cra_flags |= CRYPTO_ALG_TYPE_AKCIPHER;
+ return crypto_register_alg(base);
+}
+EXPORT_SYMBOL_GPL(crypto_register_akcipher);
+
+void crypto_unregister_akcipher(struct akcipher_alg *alg)
+{
+ crypto_unregister_alg(&alg->base);
+}
+EXPORT_SYMBOL_GPL(crypto_unregister_akcipher);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Generic public key cihper type");
diff --git a/crypto/crypto_user.c b/crypto/crypto_user.c
index 41dfe762b7fb..11dbd5a81c72 100644
--- a/crypto/crypto_user.c
+++ b/crypto/crypto_user.c
@@ -27,6 +27,7 @@
#include <net/net_namespace.h>
#include <crypto/internal/aead.h>
#include <crypto/internal/skcipher.h>
+#include <crypto/akcipher.h>
#include "internal.h"
@@ -110,6 +111,21 @@ nla_put_failure:
return -EMSGSIZE;
}
+static int crypto_report_akcipher(struct sk_buff *skb, struct crypto_alg *alg)
+{
+ struct crypto_report_akcipher rakcipher;
+
+ strncpy(rakcipher.type, "akcipher", sizeof(rakcipher.type));
+
+ if (nla_put(skb, CRYPTOCFGA_REPORT_AKCIPHER,
+ sizeof(struct crypto_report_akcipher), &rakcipher))
+ goto nla_put_failure;
+ return 0;
+
+nla_put_failure:
+ return -EMSGSIZE;
+}
+
static int crypto_report_one(struct crypto_alg *alg,
struct crypto_user_alg *ualg, struct sk_buff *skb)
{
@@ -154,6 +170,12 @@ static int crypto_report_one(struct crypto_alg *alg,
goto nla_put_failure;
break;
+
+ case CRYPTO_ALG_TYPE_AKCIPHER:
+ if (crypto_report_akcipher(skb, alg))
+ goto nla_put_failure;
+
+ break;
}
out: