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authorLinus Torvalds <torvalds@linux-foundation.org>2013-02-21 08:18:12 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-02-21 08:18:12 -0800
commit33673dcb372b5d8179c22127ca71deb5f3dc7016 (patch)
treed182e9dc6aa127375a92b5eb619d6cd2ddc23ce7
parentfe9453a1dcb5fb146f9653267e78f4a558066f6f (diff)
parent5b2660326039a32b28766cb4c1a8b1bdcfadc375 (diff)
downloadlinux-33673dcb372b5d8179c22127ca71deb5f3dc7016.tar.gz
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
Pull security subsystem updates from James Morris: "This is basically a maintenance update for the TPM driver and EVM/IMA" Fix up conflicts in lib/digsig.c and security/integrity/ima/ima_main.c * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (45 commits) tpm/ibmvtpm: build only when IBM pseries is configured ima: digital signature verification using asymmetric keys ima: rename hash calculation functions ima: use new crypto_shash API instead of old crypto_hash ima: add policy support for file system uuid evm: add file system uuid to EVM hmac tpm_tis: check pnp_acpi_device return code char/tpm/tpm_i2c_stm_st33: drop temporary variable for return value char/tpm/tpm_i2c_stm_st33: remove dead assignment in tpm_st33_i2c_probe char/tpm/tpm_i2c_stm_st33: Remove __devexit attribute char/tpm/tpm_i2c_stm_st33: Don't use memcpy for one byte assignment tpm_i2c_stm_st33: removed unused variables/code TPM: Wait for TPM_ACCESS tpmRegValidSts to go high at startup tpm: Fix cancellation of TPM commands (interrupt mode) tpm: Fix cancellation of TPM commands (polling mode) tpm: Store TPM vendor ID TPM: Work around buggy TPMs that block during continue self test tpm_i2c_stm_st33: fix oops when i2c client is unavailable char/tpm: Use struct dev_pm_ops for power management TPM: STMicroelectronics ST33 I2C BUILD STUFF ...
-rw-r--r--Documentation/ABI/stable/sysfs-class-tpm185
-rw-r--r--Documentation/ABI/testing/ima_policy10
-rw-r--r--drivers/char/tpm/Kconfig12
-rw-r--r--drivers/char/tpm/Makefile1
-rw-r--r--drivers/char/tpm/tpm.c114
-rw-r--r--drivers/char/tpm/tpm.h52
-rw-r--r--drivers/char/tpm/tpm_acpi.c8
-rw-r--r--drivers/char/tpm/tpm_atmel.c7
-rw-r--r--drivers/char/tpm/tpm_i2c_infineon.c7
-rw-r--r--drivers/char/tpm/tpm_i2c_stm_st33.c887
-rw-r--r--drivers/char/tpm/tpm_i2c_stm_st33.h61
-rw-r--r--drivers/char/tpm/tpm_ibmvtpm.c15
-rw-r--r--drivers/char/tpm/tpm_nsc.c7
-rw-r--r--drivers/char/tpm/tpm_tis.c64
-rw-r--r--lib/digsig.c41
-rw-r--r--lib/mpi/mpi-internal.h4
-rw-r--r--lib/mpi/mpicoder.c8
-rw-r--r--security/integrity/Kconfig12
-rw-r--r--security/integrity/Makefile1
-rw-r--r--security/integrity/digsig.c11
-rw-r--r--security/integrity/digsig_asymmetric.c115
-rw-r--r--security/integrity/evm/Kconfig13
-rw-r--r--security/integrity/evm/evm.h2
-rw-r--r--security/integrity/evm/evm_crypto.c3
-rw-r--r--security/integrity/evm/evm_main.c10
-rw-r--r--security/integrity/evm/evm_secfs.c6
-rw-r--r--security/integrity/iint.c10
-rw-r--r--security/integrity/ima/ima.h21
-rw-r--r--security/integrity/ima/ima_api.c27
-rw-r--r--security/integrity/ima/ima_appraise.c92
-rw-r--r--security/integrity/ima/ima_crypto.c81
-rw-r--r--security/integrity/ima/ima_init.c3
-rw-r--r--security/integrity/ima/ima_main.c138
-rw-r--r--security/integrity/ima/ima_policy.c138
-rw-r--r--security/integrity/integrity.h62
35 files changed, 1917 insertions, 311 deletions
diff --git a/Documentation/ABI/stable/sysfs-class-tpm b/Documentation/ABI/stable/sysfs-class-tpm
new file mode 100644
index 00000000000..a60b45e2493
--- /dev/null
+++ b/Documentation/ABI/stable/sysfs-class-tpm
@@ -0,0 +1,185 @@
+What: /sys/class/misc/tpmX/device/
+Date: April 2005
+KernelVersion: 2.6.12
+Contact: tpmdd-devel@lists.sf.net
+Description: The device/ directory under a specific TPM instance exposes
+ the properties of that TPM chip
+
+
+What: /sys/class/misc/tpmX/device/active
+Date: April 2006
+KernelVersion: 2.6.17
+Contact: tpmdd-devel@lists.sf.net
+Description: The "active" property prints a '1' if the TPM chip is accepting
+ commands. An inactive TPM chip still contains all the state of
+ an active chip (Storage Root Key, NVRAM, etc), and can be
+ visible to the OS, but will only accept a restricted set of
+ commands. See the TPM Main Specification part 2, Structures,
+ section 17 for more information on which commands are
+ available.
+
+What: /sys/class/misc/tpmX/device/cancel
+Date: June 2005
+KernelVersion: 2.6.13
+Contact: tpmdd-devel@lists.sf.net
+Description: The "cancel" property allows you to cancel the currently
+ pending TPM command. Writing any value to cancel will call the
+ TPM vendor specific cancel operation.
+
+What: /sys/class/misc/tpmX/device/caps
+Date: April 2005
+KernelVersion: 2.6.12
+Contact: tpmdd-devel@lists.sf.net
+Description: The "caps" property contains TPM manufacturer and version info.
+
+ Example output:
+
+ Manufacturer: 0x53544d20
+ TCG version: 1.2
+ Firmware version: 8.16
+
+ Manufacturer is a hex dump of the 4 byte manufacturer info
+ space in a TPM. TCG version shows the TCG TPM spec level that
+ the chip supports. Firmware version is that of the chip and
+ is manufacturer specific.
+
+What: /sys/class/misc/tpmX/device/durations
+Date: March 2011
+KernelVersion: 3.1
+Contact: tpmdd-devel@lists.sf.net
+Description: The "durations" property shows the 3 vendor-specific values
+ used to wait for a short, medium and long TPM command. All
+ TPM commands are categorized as short, medium or long in
+ execution time, so that the driver doesn't have to wait
+ any longer than necessary before starting to poll for a
+ result.
+
+ Example output:
+
+ 3015000 4508000 180995000 [original]
+
+ Here the short, medium and long durations are displayed in
+ usecs. "[original]" indicates that the values are displayed
+ unmodified from when they were queried from the chip.
+ Durations can be modified in the case where a buggy chip
+ reports them in msec instead of usec and they need to be
+ scaled to be displayed in usecs. In this case "[adjusted]"
+ will be displayed in place of "[original]".
+
+What: /sys/class/misc/tpmX/device/enabled
+Date: April 2006
+KernelVersion: 2.6.17
+Contact: tpmdd-devel@lists.sf.net
+Description: The "enabled" property prints a '1' if the TPM chip is enabled,
+ meaning that it should be visible to the OS. This property
+ may be visible but produce a '0' after some operation that
+ disables the TPM.
+
+What: /sys/class/misc/tpmX/device/owned
+Date: April 2006
+KernelVersion: 2.6.17
+Contact: tpmdd-devel@lists.sf.net
+Description: The "owned" property produces a '1' if the TPM_TakeOwnership
+ ordinal has been executed successfully in the chip. A '0'
+ indicates that ownership hasn't been taken.
+
+What: /sys/class/misc/tpmX/device/pcrs
+Date: April 2005
+KernelVersion: 2.6.12
+Contact: tpmdd-devel@lists.sf.net
+Description: The "pcrs" property will dump the current value of all Platform
+ Configuration Registers in the TPM. Note that since these
+ values may be constantly changing, the output is only valid
+ for a snapshot in time.
+
+ Example output:
+
+ PCR-00: 3A 3F 78 0F 11 A4 B4 99 69 FC AA 80 CD 6E 39 57 C3 3B 22 75
+ PCR-01: 3A 3F 78 0F 11 A4 B4 99 69 FC AA 80 CD 6E 39 57 C3 3B 22 75
+ PCR-02: 3A 3F 78 0F 11 A4 B4 99 69 FC AA 80 CD 6E 39 57 C3 3B 22 75
+ PCR-03: 3A 3F 78 0F 11 A4 B4 99 69 FC AA 80 CD 6E 39 57 C3 3B 22 75
+ PCR-04: 3A 3F 78 0F 11 A4 B4 99 69 FC AA 80 CD 6E 39 57 C3 3B 22 75
+ ...
+
+ The number of PCRs and hex bytes needed to represent a PCR
+ value will vary depending on TPM chip version. For TPM 1.1 and
+ 1.2 chips, PCRs represent SHA-1 hashes, which are 20 bytes
+ long. Use the "caps" property to determine TPM version.
+
+What: /sys/class/misc/tpmX/device/pubek
+Date: April 2005
+KernelVersion: 2.6.12
+Contact: tpmdd-devel@lists.sf.net
+Description: The "pubek" property will return the TPM's public endorsement
+ key if possible. If the TPM has had ownership established and
+ is version 1.2, the pubek will not be available without the
+ owner's authorization. Since the TPM driver doesn't store any
+ secrets, it can't authorize its own request for the pubek,
+ making it unaccessible. The public endorsement key is gener-
+ ated at TPM menufacture time and exists for the life of the
+ chip.
+
+ Example output:
+
+ Algorithm: 00 00 00 01
+ Encscheme: 00 03
+ Sigscheme: 00 01
+ Parameters: 00 00 08 00 00 00 00 02 00 00 00 00
+ Modulus length: 256
+ Modulus:
+ B4 76 41 82 C9 20 2C 10 18 40 BC 8B E5 44 4C 6C
+ 3A B2 92 0C A4 9B 2A 83 EB 5C 12 85 04 48 A0 B6
+ 1E E4 81 84 CE B2 F2 45 1C F0 85 99 61 02 4D EB
+ 86 C4 F7 F3 29 60 52 93 6B B2 E5 AB 8B A9 09 E3
+ D7 0E 7D CA 41 BF 43 07 65 86 3C 8C 13 7A D0 8B
+ 82 5E 96 0B F8 1F 5F 34 06 DA A2 52 C1 A9 D5 26
+ 0F F4 04 4B D9 3F 2D F2 AC 2F 74 64 1F 8B CD 3E
+ 1E 30 38 6C 70 63 69 AB E2 50 DF 49 05 2E E1 8D
+ 6F 78 44 DA 57 43 69 EE 76 6C 38 8A E9 8E A3 F0
+ A7 1F 3C A8 D0 12 15 3E CA 0E BD FA 24 CD 33 C6
+ 47 AE A4 18 83 8E 22 39 75 93 86 E6 FD 66 48 B6
+ 10 AD 94 14 65 F9 6A 17 78 BD 16 53 84 30 BF 70
+ E0 DC 65 FD 3C C6 B0 1E BF B9 C1 B5 6C EF B1 3A
+ F8 28 05 83 62 26 11 DC B4 6B 5A 97 FF 32 26 B6
+ F7 02 71 CF 15 AE 16 DD D1 C1 8E A8 CF 9B 50 7B
+ C3 91 FF 44 1E CF 7C 39 FE 17 77 21 20 BD CE 9B
+
+ Possible values:
+
+ Algorithm: TPM_ALG_RSA (1)
+ Encscheme: TPM_ES_RSAESPKCSv15 (2)
+ TPM_ES_RSAESOAEP_SHA1_MGF1 (3)
+ Sigscheme: TPM_SS_NONE (1)
+ Parameters, a byte string of 3 u32 values:
+ Key Length (bits): 00 00 08 00 (2048)
+ Num primes: 00 00 00 02 (2)
+ Exponent Size: 00 00 00 00 (0 means the
+ default exp)
+ Modulus Length: 256 (bytes)
+ Modulus: The 256 byte Endorsement Key modulus
+
+What: /sys/class/misc/tpmX/device/temp_deactivated
+Date: April 2006
+KernelVersion: 2.6.17
+Contact: tpmdd-devel@lists.sf.net
+Description: The "temp_deactivated" property returns a '1' if the chip has
+ been temporarily dectivated, usually until the next power
+ cycle. Whether a warm boot (reboot) will clear a TPM chip
+ from a temp_deactivated state is platform specific.
+
+What: /sys/class/misc/tpmX/device/timeouts
+Date: March 2011
+KernelVersion: 3.1
+Contact: tpmdd-devel@lists.sf.net
+Description: The "timeouts" property shows the 4 vendor-specific values
+ for the TPM's interface spec timeouts. The use of these
+ timeouts is defined by the TPM interface spec that the chip
+ conforms to.
+
+ Example output:
+
+ 750000 750000 750000 750000 [original]
+
+ The four timeout values are shown in usecs, with a trailing
+ "[original]" or "[adjusted]" depending on whether the values
+ were scaled by the driver to be reported in usec from msecs.
diff --git a/Documentation/ABI/testing/ima_policy b/Documentation/ABI/testing/ima_policy
index ec0a38ef314..f1c5cc9d17a 100644
--- a/Documentation/ABI/testing/ima_policy
+++ b/Documentation/ABI/testing/ima_policy
@@ -18,17 +18,21 @@ Description:
rule format: action [condition ...]
action: measure | dont_measure | appraise | dont_appraise | audit
- condition:= base | lsm
- base: [[func=] [mask=] [fsmagic=] [uid=] [fowner]]
+ condition:= base | lsm [option]
+ base: [[func=] [mask=] [fsmagic=] [fsuuid=] [uid=]
+ [fowner]]
lsm: [[subj_user=] [subj_role=] [subj_type=]
[obj_user=] [obj_role=] [obj_type=]]
+ option: [[appraise_type=]]
- base: func:= [BPRM_CHECK][FILE_MMAP][FILE_CHECK][MODULE_CHECK]
+ base: func:= [BPRM_CHECK][MMAP_CHECK][FILE_CHECK][MODULE_CHECK]
mask:= [MAY_READ] [MAY_WRITE] [MAY_APPEND] [MAY_EXEC]
fsmagic:= hex value
+ fsuuid:= file system UUID (e.g 8bcbe394-4f13-4144-be8e-5aa9ea2ce2f6)
uid:= decimal value
fowner:=decimal value
lsm: are LSM specific
+ option: appraise_type:= [imasig]
default policy:
# PROC_SUPER_MAGIC
diff --git a/drivers/char/tpm/Kconfig b/drivers/char/tpm/Kconfig
index 915875e431d..dbfd56446c3 100644
--- a/drivers/char/tpm/Kconfig
+++ b/drivers/char/tpm/Kconfig
@@ -75,10 +75,20 @@ config TCG_INFINEON
config TCG_IBMVTPM
tristate "IBM VTPM Interface"
- depends on PPC64
+ depends on PPC_PSERIES
---help---
If you have IBM virtual TPM (VTPM) support say Yes and it
will be accessible from within Linux. To compile this driver
as a module, choose M here; the module will be called tpm_ibmvtpm.
+config TCG_ST33_I2C
+ tristate "STMicroelectronics ST33 I2C TPM"
+ depends on I2C
+ depends on GPIOLIB
+ ---help---
+ If you have a TPM security chip from STMicroelectronics working with
+ an I2C bus say Yes and it will be accessible from within Linux.
+ To compile this driver as a module, choose M here; the module will be
+ called tpm_stm_st33_i2c.
+
endif # TCG_TPM
diff --git a/drivers/char/tpm/Makefile b/drivers/char/tpm/Makefile
index 5b3fc8bc6c1..a3736c97c65 100644
--- a/drivers/char/tpm/Makefile
+++ b/drivers/char/tpm/Makefile
@@ -17,3 +17,4 @@ obj-$(CONFIG_TCG_NSC) += tpm_nsc.o
obj-$(CONFIG_TCG_ATMEL) += tpm_atmel.o
obj-$(CONFIG_TCG_INFINEON) += tpm_infineon.o
obj-$(CONFIG_TCG_IBMVTPM) += tpm_ibmvtpm.o
+obj-$(CONFIG_TCG_ST33_I2C) += tpm_i2c_stm_st33.o
diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c
index 93211df52aa..0d2e82f9557 100644
--- a/drivers/char/tpm/tpm.c
+++ b/drivers/char/tpm/tpm.c
@@ -40,8 +40,9 @@ enum tpm_duration {
};
#define TPM_MAX_ORDINAL 243
-#define TPM_MAX_PROTECTED_ORDINAL 12
-#define TPM_PROTECTED_ORDINAL_MASK 0xFF
+#define TSC_MAX_ORDINAL 12
+#define TPM_PROTECTED_COMMAND 0x00
+#define TPM_CONNECTION_COMMAND 0x40
/*
* Bug workaround - some TPM's don't flush the most
@@ -65,21 +66,6 @@ static DECLARE_BITMAP(dev_mask, TPM_NUM_DEVICES);
* values of the SHORT, MEDIUM, and LONG durations are retrieved
* from the chip during initialization with a call to tpm_get_timeouts.
*/
-static const u8 tpm_protected_ordinal_duration[TPM_MAX_PROTECTED_ORDINAL] = {
- TPM_UNDEFINED, /* 0 */
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED, /* 5 */
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_SHORT, /* 10 */
- TPM_SHORT,
-};
-
static const u8 tpm_ordinal_duration[TPM_MAX_ORDINAL] = {
TPM_UNDEFINED, /* 0 */
TPM_UNDEFINED,
@@ -351,14 +337,11 @@ unsigned long tpm_calc_ordinal_duration(struct tpm_chip *chip,
{
int duration_idx = TPM_UNDEFINED;
int duration = 0;
+ u8 category = (ordinal >> 24) & 0xFF;
- if (ordinal < TPM_MAX_ORDINAL)
+ if ((category == TPM_PROTECTED_COMMAND && ordinal < TPM_MAX_ORDINAL) ||
+ (category == TPM_CONNECTION_COMMAND && ordinal < TSC_MAX_ORDINAL))
duration_idx = tpm_ordinal_duration[ordinal];
- else if ((ordinal & TPM_PROTECTED_ORDINAL_MASK) <
- TPM_MAX_PROTECTED_ORDINAL)
- duration_idx =
- tpm_protected_ordinal_duration[ordinal &
- TPM_PROTECTED_ORDINAL_MASK];
if (duration_idx != TPM_UNDEFINED)
duration = chip->vendor.duration[duration_idx];
@@ -410,7 +393,7 @@ static ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
chip->vendor.req_complete_val)
goto out_recv;
- if ((status == chip->vendor.req_canceled)) {
+ if (chip->vendor.req_canceled(chip, status)) {
dev_err(chip->dev, "Operation Canceled\n");
rc = -ECANCELED;
goto out;
@@ -468,7 +451,7 @@ static ssize_t transmit_cmd(struct tpm_chip *chip, struct tpm_cmd_t *cmd,
return -EFAULT;
err = be32_to_cpu(cmd->header.out.return_code);
- if (err != 0)
+ if (err != 0 && desc)
dev_err(chip->dev, "A TPM error (%d) occurred %s\n", err, desc);
return err;
@@ -528,6 +511,25 @@ void tpm_gen_interrupt(struct tpm_chip *chip)
}
EXPORT_SYMBOL_GPL(tpm_gen_interrupt);
+#define TPM_ORD_STARTUP cpu_to_be32(153)
+#define TPM_ST_CLEAR cpu_to_be16(1)
+#define TPM_ST_STATE cpu_to_be16(2)
+#define TPM_ST_DEACTIVATED cpu_to_be16(3)
+static const struct tpm_input_header tpm_startup_header = {
+ .tag = TPM_TAG_RQU_COMMAND,
+ .length = cpu_to_be32(12),
+ .ordinal = TPM_ORD_STARTUP
+};
+
+static int tpm_startup(struct tpm_chip *chip, __be16 startup_type)
+{
+ struct tpm_cmd_t start_cmd;
+ start_cmd.header.in = tpm_startup_header;
+ start_cmd.params.startup_in.startup_type = startup_type;
+ return transmit_cmd(chip, &start_cmd, TPM_INTERNAL_RESULT_SIZE,
+ "attempting to start the TPM");
+}
+
int tpm_get_timeouts(struct tpm_chip *chip)
{
struct tpm_cmd_t tpm_cmd;
@@ -541,11 +543,28 @@ int tpm_get_timeouts(struct tpm_chip *chip)
tpm_cmd.params.getcap_in.cap = TPM_CAP_PROP;
tpm_cmd.params.getcap_in.subcap_size = cpu_to_be32(4);
tpm_cmd.params.getcap_in.subcap = TPM_CAP_PROP_TIS_TIMEOUT;
+ rc = transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE, NULL);
- rc = transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE,
- "attempting to determine the timeouts");
- if (rc)
+ if (rc == TPM_ERR_INVALID_POSTINIT) {
+ /* The TPM is not started, we are the first to talk to it.
+ Execute a startup command. */
+ dev_info(chip->dev, "Issuing TPM_STARTUP");
+ if (tpm_startup(chip, TPM_ST_CLEAR))
+ return rc;
+
+ tpm_cmd.header.in = tpm_getcap_header;
+ tpm_cmd.params.getcap_in.cap = TPM_CAP_PROP;
+ tpm_cmd.params.getcap_in.subcap_size = cpu_to_be32(4);
+ tpm_cmd.params.getcap_in.subcap = TPM_CAP_PROP_TIS_TIMEOUT;
+ rc = transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE,
+ NULL);
+ }
+ if (rc) {
+ dev_err(chip->dev,
+ "A TPM error (%zd) occurred attempting to determine the timeouts\n",
+ rc);
goto duration;
+ }
if (be32_to_cpu(tpm_cmd.header.out.return_code) != 0 ||
be32_to_cpu(tpm_cmd.header.out.length)
@@ -824,7 +843,7 @@ int tpm_do_selftest(struct tpm_chip *chip)
{
int rc;
unsigned int loops;
- unsigned int delay_msec = 1000;
+ unsigned int delay_msec = 100;
unsigned long duration;
struct tpm_cmd_t cmd;
@@ -845,6 +864,14 @@ int tpm_do_selftest(struct tpm_chip *chip)
cmd.header.in = pcrread_header;
cmd.params.pcrread_in.pcr_idx = cpu_to_be32(0);
rc = tpm_transmit(chip, (u8 *) &cmd, READ_PCR_RESULT_SIZE);
+ /* Some buggy TPMs will not respond to tpm_tis_ready() for
+ * around 300ms while the self test is ongoing, keep trying
+ * until the self test duration expires. */
+ if (rc == -ETIME) {
+ dev_info(chip->dev, HW_ERR "TPM command timed out during continue self test");
+ msleep(delay_msec);
+ continue;
+ }
if (rc < TPM_HEADER_SIZE)
return -EFAULT;
@@ -1075,12 +1102,28 @@ ssize_t tpm_store_cancel(struct device *dev, struct device_attribute *attr,
}
EXPORT_SYMBOL_GPL(tpm_store_cancel);
+static bool wait_for_tpm_stat_cond(struct tpm_chip *chip, u8 mask, bool check_cancel,
+ bool *canceled)
+{
+ u8 status = chip->vendor.status(chip);
+
+ *canceled = false;
+ if ((status & mask) == mask)
+ return true;
+ if (check_cancel && chip->vendor.req_canceled(chip, status)) {
+ *canceled = true;
+ return true;
+ }
+ return false;
+}
+
int wait_for_tpm_stat(struct tpm_chip *chip, u8 mask, unsigned long timeout,
- wait_queue_head_t *queue)
+ wait_queue_head_t *queue, bool check_cancel)
{
unsigned long stop;
long rc;
u8 status;
+ bool canceled = false;
/* check current status */
status = chip->vendor.status(chip);
@@ -1095,11 +1138,14 @@ again:
if ((long)timeout <= 0)
return -ETIME;
rc = wait_event_interruptible_timeout(*queue,
- ((chip->vendor.status(chip)
- & mask) == mask),
- timeout);
- if (rc > 0)
+ wait_for_tpm_stat_cond(chip, mask, check_cancel,
+ &canceled),
+ timeout);
+ if (rc > 0) {
+ if (canceled)
+ return -ECANCELED;
return 0;
+ }
if (rc == -ERESTARTSYS && freezing(current)) {
clear_thread_flag(TIF_SIGPENDING);
goto again;
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index 8ef7649a50a..81b52015f66 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -47,6 +47,7 @@ enum tpm_addr {
#define TPM_WARN_DOING_SELFTEST 0x802
#define TPM_ERR_DEACTIVATED 0x6
#define TPM_ERR_DISABLED 0x7
+#define TPM_ERR_INVALID_POSTINIT 38
#define TPM_HEADER_SIZE 10
extern ssize_t tpm_show_pubek(struct device *, struct device_attribute *attr,
@@ -77,7 +78,7 @@ struct tpm_chip;
struct tpm_vendor_specific {
const u8 req_complete_mask;
const u8 req_complete_val;
- const u8 req_canceled;
+ bool (*req_canceled)(struct tpm_chip *chip, u8 status);
void __iomem *iobase; /* ioremapped address */
unsigned long base; /* TPM base address */
@@ -100,13 +101,19 @@ struct tpm_vendor_specific {
bool timeout_adjusted;
unsigned long duration[3]; /* jiffies */
bool duration_adjusted;
- void *data;
+ void *priv;
wait_queue_head_t read_queue;
wait_queue_head_t int_queue;
+
+ u16 manufacturer_id;
};
+#define TPM_VPRIV(c) (c)->vendor.priv
+
#define TPM_VID_INTEL 0x8086
+#define TPM_VID_WINBOND 0x1050
+#define TPM_VID_STM 0x104A
struct tpm_chip {
struct device *dev; /* Device stuff */
@@ -154,13 +161,13 @@ struct tpm_input_header {
__be16 tag;
__be32 length;
__be32 ordinal;
-}__attribute__((packed));
+} __packed;
struct tpm_output_header {
__be16 tag;
__be32 length;
__be32 return_code;
-}__attribute__((packed));
+} __packed;
struct stclear_flags_t {
__be16 tag;
@@ -169,14 +176,14 @@ struct stclear_flags_t {
u8 physicalPresence;
u8 physicalPresenceLock;
u8 bGlobalLock;
-}__attribute__((packed));
+} __packed;
struct tpm_version_t {
u8 Major;
u8 Minor;
u8 revMajor;
u8 revMinor;
-}__attribute__((packed));
+} __packed;
struct tpm_version_1_2_t {
__be16 tag;
@@ -184,20 +191,20 @@ struct tpm_version_1_2_t {
u8 Minor;
u8 revMajor;
u8 revMinor;
-}__attribute__((packed));
+} __packed;
struct timeout_t {
__be32 a;
__be32 b;
__be32 c;
__be32 d;
-}__attribute__((packed));
+} __packed;
struct duration_t {
__be32 tpm_short;
__be32 tpm_medium;
__be32 tpm_long;
-}__attribute__((packed));
+} __packed;
struct permanent_flags_t {
__be16 tag;
@@ -221,7 +228,7 @@ struct permanent_flags_t {
u8 tpmEstablished;
u8 maintenanceDone;
u8 disableFullDALogicInfo;
-}__attribute__((packed));
+} __packed;
typedef union {
struct permanent_flags_t perm_flags;
@@ -239,12 +246,12 @@ struct tpm_getcap_params_in {
__be32 cap;
__be32 subcap_size;
__be32 subcap;
-}__attribute__((packed));
+} __packed;
struct tpm_getcap_params_out {
__be32 cap_size;
cap_t cap;
-}__attribute__((packed));
+} __packed;
struct tpm_readpubek_params_out {
u8 algorithm[4];
@@ -255,7 +262,7 @@ struct tpm_readpubek_params_out {
__be32 keysize;
u8 modulus[256];
u8 checksum[20];
-}__attribute__((packed));
+} __packed;
typedef union {
struct tpm_input_header in;
@@ -265,16 +272,16 @@ typedef union {
#define TPM_DIGEST_SIZE 20
struct tpm_pcrread_out {
u8 pcr_result[TPM_DIGEST_SIZE];
-}__attribute__((packed));
+} __packed;
struct tpm_pcrread_in {
__be32 pcr_idx;
-}__attribute__((packed));
+} __packed;
struct tpm_pcrextend_in {
__be32 pcr_idx;
u8 hash[TPM_DIGEST_SIZE];
-}__attribute__((packed));
+} __packed;
/* 128 bytes is an arbitrary cap. This could be as large as TPM_BUFSIZE - 18
* bytes, but 128 is still a relatively large number of random bytes and
@@ -285,11 +292,15 @@ struct tpm_pcrextend_in {
struct tpm_getrandom_out {
__be32 rng_data_len;
u8 rng_data[TPM_MAX_RNG_DATA];
-}__attribute__((packed));
+} __packed;
struct tpm_getrandom_in {
__be32 num_bytes;
-}__attribute__((packed));
+} __packed;
+
+struct tpm_startup_in {
+ __be16 startup_type;
+} __packed;
typedef union {
struct tpm_getcap_params_out getcap_out;
@@ -301,12 +312,13 @@ typedef union {
struct tpm_pcrextend_in pcrextend_in;
struct tpm_getrandom_in getrandom_in;
struct tpm_getrandom_out getrandom_out;
+ struct tpm_startup_in startup_in;
} tpm_cmd_params;
struct tpm_cmd_t {
tpm_cmd_header header;
tpm_cmd_params params;
-}__attribute__((packed));
+} __packed;
ssize_t tpm_getcap(struct device *, __be32, cap_t *, const char *);
@@ -326,7 +338,7 @@ extern void tpm_remove_hardware(struct device *);
extern int tpm_pm_suspend(struct device *);
extern int tpm_pm_resume(struct device *);
extern int wait_for_tpm_stat(struct tpm_chip *, u8, unsigned long,
- wait_queue_head_t *);
+ wait_queue_head_t *, bool);
#ifdef CONFIG_ACPI
extern int tpm_add_ppi(struct kobject *);
diff --git a/drivers/char/tpm/tpm_acpi.c b/drivers/char/tpm/tpm_acpi.c
index 56051d0c97a..64420b3396a 100644
--- a/drivers/char/tpm/tpm_acpi.c
+++ b/drivers/char/tpm/tpm_acpi.c
@@ -33,13 +33,13 @@ struct acpi_tcpa {
u16 platform_class;
union {
struct client_hdr {
- u32 log_max_len __attribute__ ((packed));
- u64 log_start_addr __attribute__ ((packed));
+ u32 log_max_len __packed;
+ u64 log_start_addr __packed;
} client;
struct server_hdr {
u16 reserved;
- u64 log_max_len __attribute__ ((packed));
- u64 log_start_addr __attribute__ ((packed));
+ u64 log_max_len __packed;
+ u64 log_start_addr __packed;
} server;
};
};
diff --git a/drivers/char/tpm/tpm_atmel.c b/drivers/char/tpm/tpm_atmel.c
index 678d57019dc..99d6820c611 100644
--- a/drivers/char/tpm/tpm_atmel.c
+++ b/drivers/char/tpm/tpm_atmel.c
@@ -116,6 +116,11 @@ static u8 tpm_atml_status(struct tpm_chip *chip)
return ioread8(chip->vendor.iobase + 1);
}
+static bool tpm_atml_req_canceled(struct tpm_chip *chip, u8 status)
+{
+ return (status == ATML_STATUS_READY);
+}
+
static const struct file_operations atmel_ops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
@@ -147,7 +152,7 @@ static const struct tpm_vendor_specific tpm_atmel = {
.status = tpm_atml_status,
.req_complete_mask = ATML_STATUS_BUSY | ATML_STATUS_DATA_AVAIL,
.req_complete_val = ATML_STATUS_DATA_AVAIL,
- .req_canceled = ATML_STATUS_READY,
+ .req_canceled = tpm_atml_req_canceled,
.attr_group = &atmel_attr_grp,
.miscdev = { .fops = &atmel_ops, },
};
diff --git a/drivers/char/tpm/tpm_i2c_infineon.c b/drivers/char/tpm/tpm_i2c_infineon.c
index fb447bd0cb6..8fe7ac3d095 100644
--- a/drivers/char/tpm/tpm_i2c_infineon.c
+++ b/drivers/char/tpm/tpm_i2c_infineon.c
@@ -505,6 +505,11 @@ out_err:
return rc;
}
+static bool tpm_tis_i2c_req_canceled(struct tpm_chip *chip, u8 status)
+{
+ return (status == TPM_STS_COMMAND_READY);
+}
+
static const struct file_operations tis_ops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
@@ -550,7 +555,7 @@ static struct tpm_vendor_specific tpm_tis_i2c = {
.cancel = tpm_tis_i2c_ready,
.req_complete_mask = TPM_STS_DATA_AVAIL | TPM_STS_VALID,
.req_complete_val = TPM_STS_DATA_AVAIL | TPM_STS_VALID,
- .req_canceled = TPM_STS_COMMAND_READY,
+ .req_canceled = tpm_tis_i2c_req_canceled,
.attr_group = &tis_attr_grp,
.miscdev.fops = &tis_ops,
};
diff --git a/drivers/char/tpm/tpm_i2c_stm_st33.c b/drivers/char/tpm/tpm_i2c_stm_st33.c
new file mode 100644
index 00000000000..1f5f71e14ab
--- /dev/null
+++ b/drivers/char/tpm/tpm_i2c_stm_st33.c
@@ -0,0 +1,887 @@
+/*
+ * STMicroelectronics TPM I2C Linux driver for TPM ST33ZP24
+ * Copyright (C) 2009, 2010 STMicroelectronics
+ *
+ * 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.
+ *
+ * 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, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * STMicroelectronics version 1.2.0, Copyright (C) 2010
+ * STMicroelectronics comes with ABSOLUTELY NO WARRANTY.
+ * This is free software, and you are welcome to redistribute it
+ * under certain conditions.
+ *
+ * @Author: Christophe RICARD tpmsupport@st.com
+ *
+ * @File: tpm_stm_st33_i2c.c
+ *
+ * @Synopsis:
+ * 09/15/2010: First shot driver tpm_tis driver for
+ lpc is used as model.
+ */
+
+#include <linux/pci.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/i2c.h>
+#include <linux/fs.h>
+#include <linux/miscdevice.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/wait.h>
+#include <linux/string.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+#include <linux/sysfs.h>
+#include <linux/gpio.h>
+#include <linux/sched.h>
+#include <linux/uaccess.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/sched.h>
+
+#include "tpm.h"
+#include "tpm_i2c_stm_st33.h"
+
+enum stm33zp24_access {
+ TPM_ACCESS_VALID = 0x80,
+ TPM_ACCESS_ACTIVE_LOCALITY = 0x20,
+ TPM_ACCESS_REQUEST_PENDING = 0x04,
+ TPM_ACCESS_REQUEST_USE = 0x02,
+};
+
+enum stm33zp24_status {
+ TPM_STS_VALID = 0x80,
+ TPM_STS_COMMAND_READY = 0x40,
+ TPM_STS_GO = 0x20,
+ TPM_STS_DATA_AVAIL = 0x10,
+ TPM_STS_DATA_EXPECT = 0x08,
+};
+
+enum stm33zp24_int_flags {
+ TPM_GLOBAL_INT_ENABLE = 0x80,
+ TPM_INTF_CMD_READY_INT = 0x080,
+ TPM_INTF_FIFO_AVALAIBLE_INT = 0x040,
+ TPM_INTF_WAKE_UP_READY_INT = 0x020,
+ TPM_INTF_LOCALITY_CHANGE_INT = 0x004,
+ TPM_INTF_STS_VALID_INT = 0x002,
+ TPM_INTF_DATA_AVAIL_INT = 0x001,
+};
+
+enum tis_defaults {
+ TIS_SHORT_TIMEOUT = 750,
+ TIS_LONG_TIMEOUT = 2000,
+};
+
+/*
+ * write8_reg
+ * Send byte to the TIS register according to the ST33ZP24 I2C protocol.
+ * @param: tpm_register, the tpm tis register where the data should be written
+ * @param: tpm_data, the tpm_data to write inside the tpm_register
+ * @param: tpm_size, The length of the data
+ * @return: Returns negative errno, or else the number of bytes written.
+ */
+static int write8_reg(struct i2c_client *client, u8 tpm_register,
+ u8 *tpm_data, u16 tpm_size)
+{
+ struct st33zp24_platform_data *pin_infos;
+
+ pin_infos = client->dev.platform_data;
+
+ pin_infos->tpm_i2c_buffer[0][0] = tpm_register;
+ memcpy(&pin_infos->tpm_i2c_buffer[0][1], tpm_data, tpm_size);
+ return i2c_master_send(client, pin_infos->tpm_i2c_buffer[0],
+ tpm_size + 1);
+} /* write8_reg() */
+
+/*
+ * read8_reg
+ * Recv byte from the TIS register according to the ST33ZP24 I2C protocol.
+ * @param: tpm_register, the tpm tis register where the data should be read
+ * @param: tpm_data, the TPM response
+ * @param: tpm_size, tpm TPM response size to read.
+ * @return: number of byte read successfully: should be one if success.
+ */
+static int read8_reg(struct i2c_client *client, u8 tpm_register,
+ u8 *tpm_data, int tpm_size)
+{
+ u8 status = 0;
+ u8 data;
+
+ data = TPM_DUMMY_BYTE;
+ status = write8_reg(client, tpm_register, &data, 1);
+ if (status == 2)
+ status = i2c_master_recv(client, tpm_data, tpm_size);
+ return status;
+} /* read8_reg() */
+
+/*
+ * I2C_WRITE_DATA
+ * Send byte to the TIS register according to the ST33ZP24 I2C protocol.
+ * @param: client, the chip description
+ * @param: tpm_register, the tpm tis register where the data should be written
+ * @param: tpm_data, the tpm_data to write inside the tpm_register
+ * @param: tpm_size, The length of the data
+ * @return: number of byte written successfully: should be one if success.
+ */
+#define I2C_WRITE_DATA(client, tpm_register, tpm_data, tpm_size) \
+ (write8_reg(client, tpm_register | \
+ TPM_WRITE_DIRECTION, tpm_data, tpm_size))
+
+/*
+ * I2C_READ_DATA
+ * Recv byte from the TIS register according to the ST33ZP24 I2C protocol.
+ * @param: tpm, the chip description
+ * @param: tpm_register, the tpm tis register where the data should be read
+ * @param: tpm_data, the TPM response
+ * @param: tpm_size, tpm TPM response size to read.
+ * @return: number of byte read successfully: should be one if success.
+ */
+#define I2C_READ_DATA(client, tpm_register, tpm_data, tpm_size) \
+ (read8_reg(client, tpm_register, tpm_data, tpm_size))
+
+/*
+ * clear_interruption
+ * clear the TPM interrupt register.
+ * @param: tpm, the chip description
+ */
+static void clear_interruption(struct i2c_client *client)
+{
+ u8 interrupt;
+ I2C_READ_DATA(client, TPM_INT_STATUS, &interrupt, 1);
+ I2C_WRITE_DATA(client, TPM_INT_STATUS, &interrupt, 1);
+ I2C_READ_DATA(client, TPM_INT_STATUS, &interrupt, 1);
+} /* clear_interruption() */
+
+/*
+ * _wait_for_interrupt_serirq_timeout
+ * @param: tpm, the chip description
+ * @param: timeout, the timeout of the interrupt
+ * @return: the status of the interruption.
+ */
+static long _wait_for_interrupt_serirq_timeout(struct tpm_chip *chip,
+ unsigned long timeout)
+{
+ long status;
+ struct i2c_client *client;
+ struct st33zp24_platform_data *pin_infos;
+
+ client = (struct i2c_client *) TPM_VPRIV(chip);
+ pin_infos = client->dev.platform_data;
+
+ status = wait_for_completion_interruptible_timeout(
+ &pin_infos->irq_detection,
+ timeout);
+ if (status > 0)
+ enable_irq(gpio_to_irq(pin_infos->io_serirq));
+ gpio_direction_input(pin_infos->io_serirq);
+
+ return status;
+} /* wait_for_interrupt_serirq_timeout() */
+
+static int wait_for_serirq_timeout(struct tpm_chip *chip, bool condition,
+ unsigned long timeout)
+{
+ int status = 2;
+ struct i2c_client *client;
+
+ client = (struct i2c_client *) TPM_VPRIV(chip);
+
+ status = _wait_for_interrupt_serirq_timeout(chip, timeout);
+ if (!status) {
+ status = -EBUSY;
+ } else{
+ clear_interruption(client);
+ if (condition)
+ status = 1;
+ }
+ return status;
+}
+
+/*
+ * tpm_stm_i2c_cancel, cancel is not implemented.
+ * @param: chip, the tpm_chip description as specified in driver/char/tpm/tpm.h
+ */
+static void tpm_stm_i2c_cancel(struct tpm_chip *chip)
+{
+ struct i2c_client *client;
+ u8 data;
+
+ client = (struct i2c_client *) TPM_VPRIV(chip);
+
+ data = TPM_STS_COMMAND_READY;
+ I2C_WRITE_DATA(client, TPM_STS, &data, 1);
+ if (chip->vendor.irq)
+ wait_for_serirq_timeout(chip, 1, chip->vendor.timeout_a);
+} /* tpm_stm_i2c_cancel() */
+
+/*
+ * tpm_stm_spi_status return the TPM_STS register
+ * @param: chip, the tpm chip description
+ * @return: the TPM_STS register value.
+ */
+static u8 tpm_stm_i2c_status(struct tpm_chip *chip)
+{
+ struct i2c_client *client;
+ u8 data;
+ client = (struct i2c_client *) TPM_VPRIV(chip);
+
+ I2C_READ_DATA(client, TPM_STS, &data, 1);
+ return data;
+} /* tpm_stm_i2c_status() */
+
+
+/*
+ * check_locality if the locality is active
+ * @param: chip, the tpm chip description
+ * @return: the active locality or -EACCESS.
+ */
+static int check_locality(struct tpm_chip *chip)
+{
+ struct i2c_client *client;
+ u8 data;
+ u8 status;
+
+ client = (struct i2c_client *) TPM_VPRIV(chip);
+
+ status = I2C_READ_DATA(client, TPM_ACCESS, &data, 1);
+ if (status && (data &
+ (TPM_ACCESS_ACTIVE_LOCALITY | TPM_ACCESS_VALID)) ==
+ (TPM_ACCESS_ACTIVE_LOCALITY | TPM_ACCESS_VALID))
+ return chip->vendor.locality;
+
+ return -EACCES;
+
+} /* check_locality() */
+
+/*
+ * request_locality request the TPM locality
+ * @param: chip, the chip description
+ * @return: the active locality or EACCESS.
+ */
+static int request_locality(struct tpm_chip *chip)
+{
+ unsigned long stop;
+ long rc;
+ struct i2c_client *client;
+ u8 data;
+
+ client = (struct i2c_client *) TPM_VPRIV(chip);
+
+ if (check_locality(chip) == chip->vendor.locality)
+ return chip->vendor.locality;
+
+ data = TPM_ACCESS_REQUEST_USE;
+ rc = I2C_WRITE_DATA(client, TPM_ACCESS, &data, 1);
+ if (rc < 0)
+ goto end;
+
+ if (chip->vendor.irq) {
+ rc = wait_for_serirq_timeout(chip, (check_locality
+ (chip) >= 0),
+ chip->vendor.timeout_a);
+ if (rc > 0)
+ return chip->vendor.locality;
+ } else{
+ stop = jiffies + chip->vendor.timeout_a;
+ do {
+ if (check_locality(chip) >= 0)
+ return chip->vendor.locality;
+ msleep(TPM_TIMEOUT);
+ } while (time_before(jiffies, stop));
+ }
+ rc = -EACCES;
+end:
+ return rc;
+} /* request_locality() */
+
+/*
+ * release_locality release the active locality
+ * @param: chip, the tpm chip description.
+ */
+static void release_locality(struct tpm_chip *chip)
+{
+ struct i2c_client *client;
+ u8 data;
+
+ client = (struct i2c_client *) TPM_VPRIV(chip);
+ data = TPM_ACCESS_ACTIVE_LOCALITY;
+
+ I2C_WRITE_DATA(client, TPM_ACCESS, &data, 1);
+}
+
+/*
+ * get_burstcount return the burstcount address 0x19 0x1A
+ * @param: chip, the chip description
+ * return: the burstcount.
+ */
+static int get_burstcount(struct tpm_chip *chip)
+{
+ unsigned long stop;
+ int burstcnt, status;
+ u8 tpm_reg, temp;
+
+ struct i2c_client *client = (struct i2c_client *) TPM_VPRIV(chip);
+
+ stop = jiffies + chip->vendor.timeout_d;
+ do {
+ tpm_reg = TPM_STS + 1;
+ status = I2C_READ_DATA(client, tpm_reg, &temp, 1);
+ if (status < 0)
+ goto end;
+
+ tpm_reg = tpm_reg + 1;
+ burstcnt = temp;
+ status = I2C_READ_DATA(client, tpm_reg, &temp, 1);
+ if (status < 0)
+ goto end;
+
+ burstcnt |= temp << 8;
+ if (burstcnt)
+ return burstcnt;
+ msleep(TPM_TIMEOUT);
+ } while (time_before(jiffies, stop));
+
+end:
+ return -EBUSY;
+} /* get_burstcount() */
+
+/*
+ * wait_for_stat wait for a TPM_STS value
+ * @param: chip, the tpm chip description
+ * @param: mask, the value mask to wait
+ * @param: timeout, the timeout
+ * @param: queue, the wait queue.
+ * @return: the tpm status, 0 if success, -ETIME if timeout is reached.
+ */
+static int wait_for_stat(struct tpm_chip *chip, u8 mask, unsigned long timeout,
+ wait_queue_head_t *queue)
+{
+ unsigned long stop;
+ long rc;
+ u8 status;
+
+ if (chip->vendor.irq) {
+ rc = wait_for_serirq_timeout(chip, ((tpm_stm_i2c_status
+ (chip) & mask) ==
+ mask), timeout);
+ if (rc > 0)
+ return 0;
+ } else{
+ stop = jiffies + timeout;
+ do {
+ msleep(TPM_TIMEOUT);
+ status = tpm_stm_i2c_status(chip);
+ if ((status & mask) == mask)
+ return 0;
+ } while (time_before(jiffies, stop));
+ }
+ return -ETIME;
+} /* wait_for_stat() */
+
+/*
+ * recv_data receive data
+ * @param: chip, the tpm chip description
+ * @param: buf, the buffer where the data are received
+ * @param: count, the number of data to receive
+ * @return: the number of bytes read from TPM FIFO.
+ */
+static int recv_data(struct tpm_chip *chip, u8 *buf, size_t count)
+{
+ int size = 0, burstcnt, len;
+ struct i2c_client *client;
+
+ client = (struct i2c_client *) TPM_VPRIV(chip);
+
+ while (size < count &&
+ wait_for_stat(chip,
+ TPM_STS_DATA_AVAIL | TPM_STS_VALID,
+ chip->vendor.timeout_c,
+ &chip->vendor.read_queue)
+ == 0) {
+ burstcnt = get_burstcount(chip);
+ len = min_t(int, burstcnt, count - size);
+ I2C_READ_DATA(client, TPM_DATA_FIFO, buf + size, len);
+ size += len;
+ }
+ return size;
+}
+
+/*
+ * tpm_ioserirq_handler the serirq irq handler
+ * @param: irq, the tpm chip description
+ * @param: dev_id, the description of the chip
+ * @return: the status of the handler.
+ */
+static irqreturn_t tpm_ioserirq_handler(int irq, void *dev_id)
+{
+ struct tpm_chip *chip = dev_id;
+ struct i2c_client *client;
+ struct st33zp24_platform_data *pin_infos;
+
+ disable_irq_nosync(irq);
+
+ client = (struct i2c_client *) TPM_VPRIV(chip);
+ pin_infos = client->dev.platform_data;
+
+ complete(&pin_infos->irq_detection);
+ return IRQ_HANDLED;
+} /* tpm_ioserirq_handler() */
+
+
+/*
+ * tpm_stm_i2c_send send TPM commands through the I2C bus.
+ *
+ * @param: chip, the tpm_chip description as specified in driver/char/tpm/tpm.h
+ * @param: buf, the buffer to send.
+ * @param: count, the number of bytes to send.
+ * @return: In case of success the number of bytes sent.
+ * In other case, a < 0 value describing the issue.
+ */
+static int tpm_stm_i2c_send(struct tpm_chip *chip, unsigned char *buf,
+ size_t len)
+{
+ u32 status,
+ burstcnt = 0, i, size;
+ int ret;
+ u8 data;
+ struct i2c_client *client;
+
+ if (chip == NULL)
+ return -EBUSY;
+ if (len < TPM_HEADER_SIZE)
+ return -EBUSY;
+
+ client = (struct i2c_client *)TPM_VPRIV(chip);
+
+ client->flags = 0;
+
+ ret = request_locality(chip);
+ if (ret < 0)
+ return ret;
+
+ status = tpm_stm_i2c_status(chip);
+ if ((status & TPM_STS_COMMAND_READY) == 0) {
+ tpm_stm_i2c_cancel(chip);
+ if (wait_for_stat
+ (chip, TPM_STS_COMMAND_READY, chip->vendor.timeout_b,
+ &chip->vendor.int_queue) < 0) {
+ ret = -ETIME;
+ goto out_err;
+ }
+ }
+
+ for (i = 0 ; i < len - 1 ;) {
+ burstcnt = get_burstcount(chip);
+ size = min_t(int, len - i - 1, burstcnt);
+ ret = I2C_WRITE_DATA(client, TPM_DATA_FIFO, buf, size);
+ if (ret < 0)
+ goto out_err;
+
+ i += size;
+ }
+
+ status = tpm_stm_i2c_status(chip);
+ if ((status & TPM_STS_DATA_EXPECT) == 0) {
+ ret = -EIO;
+ goto out_err;
+ }
+
+ ret = I2C_WRITE_DATA(client, TPM_DATA_FIFO, buf + len - 1, 1);
+ if (ret < 0)
+ goto out_err;
+
+ status = tpm_stm_i2c_status(chip);
+ if ((status & TPM_STS_DATA_EXPECT) != 0) {
+ ret = -EIO;
+ goto out_err;
+ }
+
+ data = TPM_STS_GO;
+ I2C_WRITE_DATA(client, TPM_STS, &data, 1);
+
+ return len;
+out_err:
+ tpm_stm_i2c_cancel(chip);
+ release_locality(chip);
+ return ret;
+}
+
+/*
+ * tpm_stm_i2c_recv received TPM response through the I2C bus.
+ * @param: chip, the tpm_chip description as specified in driver/char/tpm/tpm.h.
+ * @param: buf, the buffer to store datas.
+ * @param: count, the number of bytes to send.
+ * @return: In case of success the number of bytes received.
+ * In other case, a < 0 value describing the issue.
+ */
+static int tpm_stm_i2c_recv(struct tpm_chip *chip, unsigned char *buf,
+ size_t count)
+{
+ int size = 0;
+ int expected;
+
+ if (chip == NULL)
+ return -EBUSY;
+
+ if (count < TPM_HEADER_SIZE) {
+ size = -EIO;
+ goto out;
+ }
+
+ size = recv_data(chip, buf, TPM_HEADER_SIZE);
+ if (size < TPM_HEADER_SIZE) {
+ dev_err(chip->dev, "Unable to read header\n");
+ goto out;
+ }
+
+ expected = be32_to_cpu(*(__be32 *) (buf + 2));
+ if (expected > count) {
+ size = -EIO;
+ goto out;
+ }
+
+ size += recv_data(chip, &buf[TPM_HEADER_SIZE],
+ expected - TPM_HEADER_SIZE);
+ if (size < expected) {
+ dev_err(chip->dev, "Unable to read remainder of result\n");
+ size = -ETIME;
+ goto out;
+ }
+
+out:
+ chip->vendor.cancel(chip);
+ release_locality(chip);
+ return size;
+}
+
+static bool tpm_st33_i2c_req_canceled(struct tpm_chip *chip, u8 status)
+{
+ return (status == TPM_STS_COMMAND_READY);
+}
+
+static const struct file_operations tpm_st33_i2c_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .read = tpm_read,
+ .write = tpm_write,
+ .open = tpm_open,
+ .release = tpm_release,
+};
+
+static DEVICE_ATTR(pubek, S_IRUGO, tpm_show_pubek, NULL);
+static DEVICE_ATTR(pcrs, S_IRUGO, tpm_show_pcrs, NULL);
+static DEVICE_ATTR(enabled, S_IRUGO, tpm_show_enabled, NULL);
+static DEVICE_ATTR(active, S_IRUGO, tpm_show_active, NULL);
+static DEVICE_ATTR(owned, S_IRUGO, tpm_show_owned, NULL);
+static DEVICE_ATTR(temp_deactivated, S_IRUGO, tpm_show_temp_deactivated, NULL);
+static DEVICE_ATTR(caps, S_IRUGO, tpm_show_caps_1_2, NULL);
+static DEVICE_ATTR(cancel, S_IWUSR | S_IWGRP, NULL, tpm_store_cancel);
+
+static struct attribute *stm_tpm_attrs[] = {
+ &dev_attr_pubek.attr,
+ &dev_attr_pcrs.attr,
+ &dev_attr_enabled.attr,
+ &dev_attr_active.attr,
+ &dev_attr_owned.attr,
+ &dev_attr_temp_deactivated.attr,
+ &dev_attr_caps.attr,
+ &dev_attr_cancel.attr, NULL,
+};
+
+static struct attribute_group stm_tpm_attr_grp = {
+ .attrs = stm_tpm_attrs
+};
+
+static struct tpm_vendor_specific st_i2c_tpm = {
+ .send = tpm_stm_i2c_send,
+ .recv = tpm_stm_i2c_recv,
+ .cancel = tpm_stm_i2c_cancel,
+ .status = tpm_stm_i2c_status,
+ .req_complete_mask = TPM_STS_DATA_AVAIL | TPM_STS_VALID,
+ .req_complete_val = TPM_STS_DATA_AVAIL | TPM_STS_VALID,
+ .req_canceled = tpm_st33_i2c_req_canceled,
+ .attr_group = &stm_tpm_attr_grp,
+ .miscdev = {.fops = &tpm_st33_i2c_fops,},
+};
+
+static int interrupts ;
+module_param(interrupts, int, 0444);
+MODULE_PARM_DESC(interrupts, "Enable interrupts");
+
+static int power_mgt = 1;
+module_param(power_mgt, int, 0444);
+MODULE_PARM_DESC(power_mgt, "Power Management");
+
+/*
+ * tpm_st33_i2c_probe initialize the TPM device
+ * @param: client, the i2c_client drescription (TPM I2C description).
+ * @param: id, the i2c_device_id struct.
+ * @return: 0 in case of success.
+ * -1 in other case.
+ */
+static int
+tpm_st33_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id)
+{
+ int err;
+ u8 intmask;
+ struct tpm_chip *chip;
+ struct st33zp24_platform_data *platform_data;
+
+ if (client == NULL) {
+ pr_info("%s: i2c client is NULL. Device not accessible.\n",
+ __func__);
+ err = -ENODEV;
+ goto end;
+ }
+
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+ dev_info(&client->dev, "client not i2c capable\n");
+ err = -ENODEV;
+ goto end;
+ }
+
+ chip = tpm_register_hardware(&client->dev, &st_i2c_tpm);
+ if (!chip) {
+ dev_info(&client->dev, "fail chip\n");
+ err = -ENODEV;
+ goto end;
+ }
+
+ platform_data = client->dev.platform_data;
+
+ if (!platform_data) {
+ dev_info(&client->dev, "chip not available\n");
+ err = -ENODEV;
+ goto _tpm_clean_answer;
+ }
+
+ platform_data->tpm_i2c_buffer[0] =
+ kmalloc(TPM_BUFSIZE * sizeof(u8), GFP_KERNEL);
+ if (platform_data->tpm_i2c_buffer[0] == NULL) {
+ err = -ENOMEM;
+ goto _tpm_clean_answer;
+ }
+ platform_data->tpm_i2c_buffer[1] =
+ kmalloc(TPM_BUFSIZE * sizeof(u8), GFP_KERNEL);
+ if (platform_data->tpm_i2c_buffer[1] == NULL) {
+ err = -ENOMEM;
+ goto _tpm_clean_response1;
+ }
+
+ TPM_VPRIV(chip) = client;
+
+ chip->vendor.timeout_a = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
+ chip->vendor.timeout_b = msecs_to_jiffies(TIS_LONG_TIMEOUT);
+ chip->vendor.timeout_c = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
+ chip->vendor.timeout_d = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
+
+ chip->vendor.locality = LOCALITY0;
+
+ if (power_mgt) {
+ err = gpio_request(platform_data->io_lpcpd, "TPM IO_LPCPD");
+ if (err)
+ goto _gpio_init1;
+ gpio_set_value(platform_data->io_lpcpd, 1);
+ }
+
+ if (interrupts) {
+ init_completion(&platform_data->irq_detection);
+ if (request_locality(chip) != LOCALITY0) {
+ err = -ENODEV;
+ goto _tpm_clean_response2;
+ }
+ err = gpio_request(platform_data->io_serirq, "TPM IO_SERIRQ");
+ if (err)
+ goto _gpio_init2;
+
+ clear_interruption(client);
+ err = request_irq(gpio_to_irq(platform_data->io_serirq),
+ &tpm_ioserirq_handler,
+ IRQF_TRIGGER_HIGH,
+ "TPM SERIRQ management", chip);
+ if (err < 0) {
+ dev_err(chip->dev , "TPM SERIRQ signals %d not available\n",
+ gpio_to_irq(platform_data->io_serirq));
+ goto _irq_set;
+ }
+
+ err = I2C_READ_DATA(client, TPM_INT_ENABLE, &intmask, 1);
+ if (err < 0)
+ goto _irq_set;
+
+ intmask |= TPM_INTF_CMD_READY_INT
+ | TPM_INTF_FIFO_AVALAIBLE_INT
+ | TPM_INTF_WAKE_UP_READY_INT
+ | TPM_INTF_LOCALITY_CHANGE_INT
+ | TPM_INTF_STS_VALID_INT
+ | TPM_INTF_DATA_AVAIL_INT;
+
+ err = I2C_WRITE_DATA(client, TPM_INT_ENABLE, &intmask, 1);
+ if (err < 0)
+ goto _irq_set;
+
+ intmask = TPM_GLOBAL_INT_ENABLE;
+ err = I2C_WRITE_DATA(client, (TPM_INT_ENABLE + 3), &intmask, 1);
+ if (err < 0)
+ goto _irq_set;
+
+ err = I2C_READ_DATA(client, TPM_INT_STATUS, &intmask, 1);
+ if (err < 0)
+ goto _irq_set;
+
+ chip->vendor.irq = interrupts;
+
+ tpm_gen_interrupt(chip);
+ }
+
+ tpm_get_timeouts(chip);
+
+ i2c_set_clientdata(client, chip);
+
+ dev_info(chip->dev, "TPM I2C Initialized\n");
+ return 0;
+_irq_set:
+ free_irq(gpio_to_irq(platform_data->io_serirq), (void *) chip);
+_gpio_init2:
+ if (interrupts)
+ gpio_free(platform_data->io_serirq);
+_gpio_init1:
+ if (power_mgt)
+ gpio_free(platform_data->io_lpcpd);
+_tpm_clean_response2:
+ kzfree(platform_data->tpm_i2c_buffer[1]);
+ platform_data->tpm_i2c_buffer[1] = NULL;
+_tpm_clean_response1:
+ kzfree(platform_data->tpm_i2c_buffer[0]);
+ platform_data->tpm_i2c_buffer[0] = NULL;
+_tpm_clean_answer:
+ tpm_remove_hardware(chip->dev);
+end:
+ pr_info("TPM I2C initialisation fail\n");
+ return err;
+}
+
+/*
+ * tpm_st33_i2c_remove remove the TPM device
+ * @param: client, the i2c_client drescription (TPM I2C description).
+ clear_bit(0, &chip->is_open);
+ * @return: 0 in case of success.
+ */
+static int tpm_st33_i2c_remove(struct i2c_client *client)
+{
+ struct tpm_chip *chip = (struct tpm_chip *)i2c_get_clientdata(client);
+ struct st33zp24_platform_data *pin_infos =
+ ((struct i2c_client *) TPM_VPRIV(chip))->dev.platform_data;
+
+ if (pin_infos != NULL) {
+ free_irq(pin_infos->io_serirq, chip);
+
+ gpio_free(pin_infos->io_serirq);
+ gpio_free(pin_infos->io_lpcpd);
+
+ tpm_remove_hardware(chip->dev);
+
+ if (pin_infos->tpm_i2c_buffer[1] != NULL) {
+ kzfree(pin_infos->tpm_i2c_buffer[1]);
+ pin_infos->tpm_i2c_buffer[1] = NULL;
+ }
+ if (pin_infos->tpm_i2c_buffer[0] != NULL) {
+ kzfree(pin_infos->tpm_i2c_buffer[0]);
+ pin_infos->tpm_i2c_buffer[0] = NULL;
+ }
+ }
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+/*
+ * tpm_st33_i2c_pm_suspend suspend the TPM device
+ * Added: Work around when suspend and no tpm application is running, suspend
+ * may fail because chip->data_buffer is not set (only set in tpm_open in Linux
+ * TPM core)
+ * @param: client, the i2c_client drescription (TPM I2C description).
+ * @param: mesg, the power management message.
+ * @return: 0 in case of success.
+ */
+static int tpm_st33_i2c_pm_suspend(struct device *dev)
+{
+ struct tpm_chip *chip = dev_get_drvdata(dev);
+ struct st33zp24_platform_data *pin_infos = dev->platform_data;
+ int ret = 0;
+
+ if (power_mgt)
+ gpio_set_value(pin_infos->io_lpcpd, 0);
+ else{
+ if (chip->data_buffer == NULL)
+ chip->data_buffer = pin_infos->tpm_i2c_buffer[0];
+ ret = tpm_pm_suspend(dev);
+ }
+ return ret;
+} /* tpm_st33_i2c_suspend() */
+
+/*
+ * tpm_st33_i2c_pm_resume resume the TPM device
+ * @param: client, the i2c_client drescription (TPM I2C description).
+ * @return: 0 in case of success.
+ */
+static int tpm_st33_i2c_pm_resume(struct device *dev)
+{
+ struct tpm_chip *chip = dev_get_drvdata(dev);
+ struct st33zp24_platform_data *pin_infos = dev->platform_data;
+
+ int ret = 0;
+
+ if (power_mgt) {
+ gpio_set_value(pin_infos->io_lpcpd, 1);
+ ret = wait_for_serirq_timeout(chip,
+ (chip->vendor.status(chip) &
+ TPM_STS_VALID) == TPM_STS_VALID,
+ chip->vendor.timeout_b);
+ } else{
+ if (chip->data_buffer == NULL)
+ chip->data_buffer = pin_infos->tpm_i2c_buffer[0];
+ ret = tpm_pm_resume(dev);
+ if (!ret)
+ tpm_do_selftest(chip);
+ }
+ return ret;
+} /* tpm_st33_i2c_pm_resume() */
+#endif
+
+static const struct i2c_device_id tpm_st33_i2c_id[] = {
+ {TPM_ST33_I2C, 0},
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, tpm_st33_i2c_id);
+static SIMPLE_DEV_PM_OPS(tpm_st33_i2c_ops, tpm_st33_i2c_pm_suspend, tpm_st33_i2c_pm_resume);
+static struct i2c_driver tpm_st33_i2c_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = TPM_ST33_I2C,
+ .pm = &tpm_st33_i2c_ops,
+ },
+ .probe = tpm_st33_i2c_probe,
+ .remove = tpm_st33_i2c_remove,
+ .id_table = tpm_st33_i2c_id
+};
+
+module_i2c_driver(tpm_st33_i2c_driver);
+
+MODULE_AUTHOR("Christophe Ricard (tpmsupport@st.com)");
+MODULE_DESCRIPTION("STM TPM I2C ST33 Driver");
+MODULE_VERSION("1.2.0");
+MODULE_LICENSE("GPL");
diff --git a/drivers/char/tpm/tpm_i2c_stm_st33.h b/drivers/char/tpm/tpm_i2c_stm_st33.h
new file mode 100644
index 00000000000..439a43249aa
--- /dev/null
+++ b/drivers/char/tpm/tpm_i2c_stm_st33.h
@@ -0,0 +1,61 @@
+/*
+ * STMicroelectronics TPM I2C Linux driver for TPM ST33ZP24
+ * Copyright (C) 2009, 2010 STMicroelectronics
+ *
+ * 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.
+ *
+ * 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, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * STMicroelectronics version 1.2.0, Copyright (C) 2010
+ * STMicroelectronics comes with ABSOLUTELY NO WARRANTY.
+ * This is free software, and you are welcome to redistribute it
+ * under certain conditions.
+ *
+ * @Author: Christophe RICARD tpmsupport@st.com
+ *
+ * @File: stm_st33_tpm_i2c.h
+ *
+ * @Date: 09/15/2010
+ */
+#ifndef __STM_ST33_TPM_I2C_MAIN_H__
+#define __STM_ST33_TPM_I2C_MAIN_H__
+
+#define TPM_ACCESS (0x0)
+#define TPM_STS (0x18)
+#define TPM_HASH_END (0x20)
+#define TPM_DATA_FIFO (0x24)
+#define TPM_HASH_DATA (0x24)
+#define TPM_HASH_START (0x28)
+#define TPM_INTF_CAPABILITY (0x14)
+#define TPM_INT_STATUS (0x10)
+#define TPM_INT_ENABLE (0x08)
+
+#define TPM_DUMMY_BYTE 0xAA
+#define TPM_WRITE_DIRECTION 0x80
+#define TPM_HEADER_SIZE 10
+#define TPM_BUFSIZE 2048
+
+#define LOCALITY0 0
+
+#define TPM_ST33_I2C "st33zp24_i2c"
+
+struct st33zp24_platform_data {
+ int io_serirq;
+ int io_lpcpd;
+ struct i2c_client *client;
+ u8 *tpm_i2c_buffer[2]; /* 0 Request 1 Response */
+ struct completion irq_detection;
+ struct mutex lock;
+};
+
+#endif /* __STM_ST33_TPM_I2C_MAIN_H__ */
diff --git a/drivers/char/tpm/tpm_ibmvtpm.c b/drivers/char/tpm/tpm_ibmvtpm.c
index 9978609d93b..56b07c35a13 100644
--- a/drivers/char/tpm/tpm_ibmvtpm.c
+++ b/drivers/char/tpm/tpm_ibmvtpm.c
@@ -64,7 +64,7 @@ static struct ibmvtpm_dev *ibmvtpm_get_data(const struct device *dev)
{
struct tpm_chip *chip = dev_get_drvdata(dev);
if (chip)
- return (struct ibmvtpm_dev *)chip->vendor.data;
+ return (struct ibmvtpm_dev *)TPM_VPRIV(chip);
return NULL;
}
@@ -83,7 +83,7 @@ static int tpm_ibmvtpm_recv(struct tpm_chip *chip, u8 *buf, size_t count)
u16 len;
int sig;
- ibmvtpm = (struct ibmvtpm_dev *)chip->vendor.data;
+ ibmvtpm = (struct ibmvtpm_dev *)TPM_VPRIV(chip);
if (!ibmvtpm->rtce_buf) {
dev_err(ibmvtpm->dev, "ibmvtpm device is not ready\n");
@@ -127,7 +127,7 @@ static int tpm_ibmvtpm_send(struct tpm_chip *chip, u8 *buf, size_t count)
u64 *word = (u64 *) &crq;
int rc;
- ibmvtpm = (struct ibmvtpm_dev *)chip->vendor.data;
+ ibmvtpm = (struct ibmvtpm_dev *)TPM_VPRIV(chip);
if (!ibmvtpm->rtce_buf) {
dev_err(ibmvtpm->dev, "ibmvtpm device is not ready\n");
@@ -398,6 +398,11 @@ static int tpm_ibmvtpm_resume(struct device *dev)
return rc;
}
+static bool tpm_ibmvtpm_req_canceled(struct tpm_chip *chip, u8 status)
+{
+ return (status == 0);
+}
+
static const struct file_operations ibmvtpm_ops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
@@ -441,7 +446,7 @@ static const struct tpm_vendor_specific tpm_ibmvtpm = {
.status = tpm_ibmvtpm_status,
.req_complete_mask = 0,
.req_complete_val = 0,
- .req_canceled = 0,
+ .req_canceled = tpm_ibmvtpm_req_canceled,
.attr_group = &ibmvtpm_attr_grp,
.miscdev = { .fops = &ibmvtpm_ops, },
};
@@ -647,7 +652,7 @@ static int tpm_ibmvtpm_probe(struct vio_dev *vio_dev,
ibmvtpm->dev = dev;
ibmvtpm->vdev = vio_dev;
- chip->vendor.data = (void *)ibmvtpm;
+ TPM_VPRIV(chip) = (void *)ibmvtpm;
spin_lock_init(&ibmvtpm->rtce_lock);
diff --git a/drivers/char/tpm/tpm_nsc.c b/drivers/char/tpm/tpm_nsc.c
index 640c9a427b5..770c46f8eb3 100644
--- a/drivers/char/tpm/tpm_nsc.c
+++ b/drivers/char/tpm/tpm_nsc.c
@@ -227,6 +227,11 @@ static u8 tpm_nsc_status(struct tpm_chip *chip)
return inb(chip->vendor.base + NSC_STATUS);
}
+static bool tpm_nsc_req_canceled(struct tpm_chip *chip, u8 status)
+{
+ return (status == NSC_STATUS_RDY);
+}
+
static const struct file_operations nsc_ops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
@@ -258,7 +263,7 @@ static const struct tpm_vendor_specific tpm_nsc = {
.status = tpm_nsc_status,
.req_complete_mask = NSC_STATUS_OBF,
.req_complete_val = NSC_STATUS_OBF,
- .req_canceled = NSC_STATUS_RDY,
+ .req_canceled = tpm_nsc_req_canceled,
.attr_group = &nsc_attr_grp,
.miscdev = { .fops = &nsc_ops, },
};
diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
index ea31dafbcac..8a41b6be23a 100644
--- a/drivers/char/tpm/tpm_tis.c
+++ b/drivers/char/tpm/tpm_tis.c
@@ -84,6 +84,9 @@ static int is_itpm(struct pnp_dev *dev)
struct acpi_device *acpi = pnp_acpi_device(dev);
struct acpi_hardware_id *id;
+ if (!acpi)
+ return 0;
+
list_for_each_entry(id, &acpi->pnp.ids, list) {
if (!strcmp("INTC0102", id->id))
return 1;
@@ -98,6 +101,22 @@ static inline int is_itpm(struct pnp_dev *dev)
}
#endif
+/* Before we attempt to access the TPM we must see that the valid bit is set.
+ * The specification says that this bit is 0 at reset and remains 0 until the
+ * 'TPM has gone through its self test and initialization and has established
+ * correct values in the other bits.' */
+static int wait_startup(struct tpm_chip *chip, int l)
+{
+ unsigned long stop = jiffies + chip->vendor.timeout_a;
+ do {
+ if (ioread8(chip->vendor.iobase + TPM_ACCESS(l)) &
+ TPM_ACCESS_VALID)
+ return 0;
+ msleep(TPM_TIMEOUT);
+ } while (time_before(jiffies, stop));
+ return -1;
+}
+
static int check_locality(struct tpm_chip *chip, int l)
{
if ((ioread8(chip->vendor.iobase + TPM_ACCESS(l)) &
@@ -198,7 +217,7 @@ static int recv_data(struct tpm_chip *chip, u8 *buf, size_t count)
wait_for_tpm_stat(chip,
TPM_STS_DATA_AVAIL | TPM_STS_VALID,
chip->vendor.timeout_c,
- &chip->vendor.read_queue)
+ &chip->vendor.read_queue, true)
== 0) {
burstcnt = get_burstcount(chip);
for (; burstcnt > 0 && size < count; burstcnt--)
@@ -241,7 +260,7 @@ static int tpm_tis_recv(struct tpm_chip *chip, u8 *buf, size_t count)
}
wait_for_tpm_stat(chip, TPM_STS_VALID, chip->vendor.timeout_c,
- &chip->vendor.int_queue);
+ &chip->vendor.int_queue, false);
status = tpm_tis_status(chip);
if (status & TPM_STS_DATA_AVAIL) { /* retry? */
dev_err(chip->dev, "Error left over data\n");
@@ -277,7 +296,7 @@ static int tpm_tis_send_data(struct tpm_chip *chip, u8 *buf, size_t len)
tpm_tis_ready(chip);
if (wait_for_tpm_stat
(chip, TPM_STS_COMMAND_READY, chip->vendor.timeout_b,
- &chip->vendor.int_queue) < 0) {
+ &chip->vendor.int_queue, false) < 0) {
rc = -ETIME;
goto out_err;
}
@@ -292,7 +311,7 @@ static int tpm_tis_send_data(struct tpm_chip *chip, u8 *buf, size_t len)
}
wait_for_tpm_stat(chip, TPM_STS_VALID, chip->vendor.timeout_c,
- &chip->vendor.int_queue);
+ &chip->vendor.int_queue, false);
status = tpm_tis_status(chip);
if (!itpm && (status & TPM_STS_DATA_EXPECT) == 0) {
rc = -EIO;
@@ -304,7 +323,7 @@ static int tpm_tis_send_data(struct tpm_chip *chip, u8 *buf, size_t len)
iowrite8(buf[count],
chip->vendor.iobase + TPM_DATA_FIFO(chip->vendor.locality));
wait_for_tpm_stat(chip, TPM_STS_VALID, chip->vendor.timeout_c,
- &chip->vendor.int_queue);
+ &chip->vendor.int_queue, false);
status = tpm_tis_status(chip);
if ((status & TPM_STS_DATA_EXPECT) != 0) {
rc = -EIO;
@@ -342,7 +361,7 @@ static int tpm_tis_send(struct tpm_chip *chip, u8 *buf, size_t len)
if (wait_for_tpm_stat
(chip, TPM_STS_DATA_AVAIL | TPM_STS_VALID,
tpm_calc_ordinal_duration(chip, ordinal),
- &chip->vendor.read_queue) < 0) {
+ &chip->vendor.read_queue, false) < 0) {
rc = -ETIME;
goto out_err;
}
@@ -374,7 +393,7 @@ static int probe_itpm(struct tpm_chip *chip)
if (vendor != TPM_VID_INTEL)
return 0;
- itpm = 0;
+ itpm = false;
rc = tpm_tis_send_data(chip, cmd_getticks, len);
if (rc == 0)
@@ -383,7 +402,7 @@ static int probe_itpm(struct tpm_chip *chip)
tpm_tis_ready(chip);
release_locality(chip, chip->vendor.locality, 0);
- itpm = 1;
+ itpm = true;
rc = tpm_tis_send_data(chip, cmd_getticks, len);
if (rc == 0) {
@@ -400,6 +419,19 @@ out:
return rc;
}
+static bool tpm_tis_req_canceled(struct tpm_chip *chip, u8 status)
+{
+ switch (chip->vendor.manufacturer_id) {
+ case TPM_VID_WINBOND:
+ return ((status == TPM_STS_VALID) ||
+ (status == (TPM_STS_VALID | TPM_STS_COMMAND_READY)));
+ case TPM_VID_STM:
+ return (status == (TPM_STS_VALID | TPM_STS_COMMAND_READY));
+ default:
+ return (status == TPM_STS_COMMAND_READY);
+ }
+}
+
static const struct file_operations tis_ops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
@@ -445,7 +477,7 @@ static struct tpm_vendor_specific tpm_tis = {
.cancel = tpm_tis_ready,
.req_complete_mask = TPM_STS_DATA_AVAIL | TPM_STS_VALID,
.req_complete_val = TPM_STS_DATA_AVAIL | TPM_STS_VALID,
- .req_canceled = TPM_STS_COMMAND_READY,
+ .req_canceled = tpm_tis_req_canceled,
.attr_group = &tis_attr_grp,
.miscdev = {
.fops = &tis_ops,},
@@ -502,7 +534,7 @@ static irqreturn_t tis_int_handler(int dummy, void *dev_id)
return IRQ_HANDLED;
}
-static bool interrupts = 1;
+static bool interrupts = true;
module_param(interrupts, bool, 0444);
MODULE_PARM_DESC(interrupts, "Enable interrupts");
@@ -528,12 +560,18 @@ static int tpm_tis_init(struct device *dev, resource_size_t start,
chip->vendor.timeout_c = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
chip->vendor.timeout_d = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
+ if (wait_startup(chip, 0) != 0) {
+ rc = -ENODEV;
+ goto out_err;
+ }
+
if (request_locality(chip, 0) != 0) {
rc = -ENODEV;
goto out_err;
}
vendor = ioread32(chip->vendor.iobase + TPM_DID_VID(0));
+ chip->vendor.manufacturer_id = vendor;
dev_info(dev,
"1.2 TPM (device-id 0x%X, rev-id %d)\n",
@@ -545,7 +583,7 @@ static int tpm_tis_init(struct device *dev, resource_size_t start,
rc = -ENODEV;
goto out_err;
}
- itpm = (probe == 0) ? 0 : 1;
+ itpm = !!probe;
}
if (itpm)
@@ -741,10 +779,10 @@ static int tpm_tis_pnp_init(struct pnp_dev *pnp_dev,
if (pnp_irq_valid(pnp_dev, 0))
irq = pnp_irq(pnp_dev, 0);
else
- interrupts = 0;
+ interrupts = false;
if (is_itpm(pnp_dev))
- itpm = 1;
+ itpm = true;
return tpm_tis_init(&pnp_dev->dev, start, len, irq);
}
diff --git a/lib/digsig.c b/lib/digsig.c
index dc2be7ed176..2f31e6a45f0 100644
--- a/lib/digsig.c
+++ b/lib/digsig.c
@@ -30,11 +30,10 @@
static struct crypto_shash *shash;
-static int pkcs_1_v1_5_decode_emsa(const unsigned char *msg,
- unsigned long msglen,
- unsigned long modulus_bitlen,
- unsigned char *out,
- unsigned long *outlen)
+static const char *pkcs_1_v1_5_decode_emsa(const unsigned char *msg,
+ unsigned long msglen,
+ unsigned long modulus_bitlen,
+ unsigned long *outlen)
{
unsigned long modulus_len, ps_len, i;
@@ -42,11 +41,11 @@ static int pkcs_1_v1_5_decode_emsa(const unsigned char *msg,
/* test message size */
if ((msglen > modulus_len) || (modulus_len < 11))
- return -EINVAL;
+ return NULL;
/* separate encoded message */
- if ((msg[0] != 0x00) || (msg[1] != (unsigned char)1))
- return -EINVAL;
+ if (msg[0] != 0x00 || msg[1] != 0x01)
+ return NULL;
for (i = 2; i < modulus_len - 1; i++)
if (msg[i] != 0xFF)
@@ -56,19 +55,13 @@ static int pkcs_1_v1_5_decode_emsa(const unsigned char *msg,
if (msg[i] != 0)
/* There was no octet with hexadecimal value 0x00
to separate ps from m. */
- return -EINVAL;
+ return NULL;
ps_len = i - 2;
- if (*outlen < (msglen - (2 + ps_len + 1))) {
- *outlen = msglen - (2 + ps_len + 1);
- return -EOVERFLOW;
- }
-
*outlen = (msglen - (2 + ps_len + 1));
- memcpy(out, &msg[2 + ps_len + 1], *outlen);
- return 0;
+ return msg + 2 + ps_len + 1;
}
/*
@@ -83,7 +76,8 @@ static int digsig_verify_rsa(struct key *key,
unsigned long mlen, mblen;
unsigned nret, l;
int head, i;
- unsigned char *out1 = NULL, *out2 = NULL;
+ unsigned char *out1 = NULL;
+ const char *m;
MPI in = NULL, res = NULL, pkey[2];
uint8_t *p, *datap, *endp;
struct user_key_payload *ukp;
@@ -120,7 +114,7 @@ static int digsig_verify_rsa(struct key *key,
}
mblen = mpi_get_nbits(pkey[0]);
- mlen = (mblen + 7)/8;
+ mlen = DIV_ROUND_UP(mblen, 8);
if (mlen == 0)
goto err;
@@ -129,10 +123,6 @@ static int digsig_verify_rsa(struct key *key,
if (!out1)
goto err;
- out2 = kzalloc(mlen, GFP_KERNEL);
- if (!out2)
- goto err;
-
nret = siglen;
in = mpi_read_from_buffer(sig, &nret);
if (!in)
@@ -164,18 +154,15 @@ static int digsig_verify_rsa(struct key *key,
kfree(p);
- err = pkcs_1_v1_5_decode_emsa(out1, len, mblen, out2, &len);
- if (err)
- goto err;
+ m = pkcs_1_v1_5_decode_emsa(out1, len, mblen, &len);
- if (len != hlen || memcmp(out2, h, hlen))
+ if (!m || len != hlen || memcmp(m, h, hlen))
err = -EINVAL;
err:
mpi_free(in);
mpi_free(res);
kfree(out1);
- kfree(out2);
while (--i >= 0)
mpi_free(pkey[i]);
err1:
diff --git a/lib/mpi/mpi-internal.h b/lib/mpi/mpi-internal.h
index 77adcf6bc25..60cf765628e 100644
--- a/lib/mpi/mpi-internal.h
+++ b/lib/mpi/mpi-internal.h
@@ -65,10 +65,6 @@
typedef mpi_limb_t *mpi_ptr_t; /* pointer to a limb */
typedef int mpi_size_t; /* (must be a signed type) */
-#define ABS(x) (x >= 0 ? x : -x)
-#define MIN(l, o) ((l) < (o) ? (l) : (o))
-#define MAX(h, i) ((h) > (i) ? (h) : (i))
-
static inline int RESIZE_IF_NEEDED(MPI a, unsigned b)
{
if (a->alloced < b)
diff --git a/lib/mpi/mpicoder.c b/lib/mpi/mpicoder.c
index 3962b7f7fe3..5f9c44cdf1f 100644
--- a/lib/mpi/mpicoder.c
+++ b/lib/mpi/mpicoder.c
@@ -52,7 +52,7 @@ MPI mpi_read_raw_data(const void *xbuffer, size_t nbytes)
else
nbits = 0;
- nlimbs = (nbytes + BYTES_PER_MPI_LIMB - 1) / BYTES_PER_MPI_LIMB;
+ nlimbs = DIV_ROUND_UP(nbytes, BYTES_PER_MPI_LIMB);
val = mpi_alloc(nlimbs);
if (!val)
return NULL;
@@ -96,8 +96,8 @@ MPI mpi_read_from_buffer(const void *xbuffer, unsigned *ret_nread)
buffer += 2;
nread = 2;
- nbytes = (nbits + 7) / 8;
- nlimbs = (nbytes + BYTES_PER_MPI_LIMB - 1) / BYTES_PER_MPI_LIMB;
+ nbytes = DIV_ROUND_UP(nbits, 8);
+ nlimbs = DIV_ROUND_UP(nbytes, BYTES_PER_MPI_LIMB);
val = mpi_alloc(nlimbs);
if (!val)
return NULL;
@@ -193,7 +193,7 @@ int mpi_set_buffer(MPI a, const void *xbuffer, unsigned nbytes, int sign)
int nlimbs;
int i;
- nlimbs = (nbytes + BYTES_PER_MPI_LIMB - 1) / BYTES_PER_MPI_LIMB;
+ nlimbs = DIV_ROUND_UP(nbytes, BYTES_PER_MPI_LIMB);
if (RESIZE_IF_NEEDED(a, nlimbs) < 0)
return -ENOMEM;
a->sign = sign;
diff --git a/security/integrity/Kconfig b/security/integrity/Kconfig
index 5bd1cc1b4a5..4bb3a775a99 100644
--- a/security/integrity/Kconfig
+++ b/security/integrity/Kconfig
@@ -17,5 +17,17 @@ config INTEGRITY_SIGNATURE
This is useful for evm and module keyrings, when keys are
usually only added from initramfs.
+config INTEGRITY_ASYMMETRIC_KEYS
+ boolean "Enable asymmetric keys support"
+ depends on INTEGRITY_SIGNATURE
+ default n
+ select ASYMMETRIC_KEY_TYPE
+ select ASYMMETRIC_PUBLIC_KEY_SUBTYPE
+ select PUBLIC_KEY_ALGO_RSA
+ select X509_CERTIFICATE_PARSER
+ help
+ This option enables digital signature verification using
+ asymmetric keys.
+
source security/integrity/ima/Kconfig
source security/integrity/evm/Kconfig
diff --git a/security/integrity/Makefile b/security/integrity/Makefile
index d43799cc14f..ebb6409b3fc 100644
--- a/security/integrity/Makefile
+++ b/security/integrity/Makefile
@@ -4,6 +4,7 @@
obj-$(CONFIG_INTEGRITY) += integrity.o
obj-$(CONFIG_INTEGRITY_SIGNATURE) += digsig.o
+obj-$(CONFIG_INTEGRITY_ASYMMETRIC_KEYS) += digsig_asymmetric.o
integrity-y := iint.o
diff --git a/security/integrity/digsig.c b/security/integrity/digsig.c
index 2dc167d7cde..0b759e17a13 100644
--- a/security/integrity/digsig.c
+++ b/security/integrity/digsig.c
@@ -44,5 +44,14 @@ int integrity_digsig_verify(const unsigned int id, const char *sig, int siglen,
}
}
- return digsig_verify(keyring[id], sig, siglen, digest, digestlen);
+ switch (sig[0]) {
+ case 1:
+ return digsig_verify(keyring[id], sig, siglen,
+ digest, digestlen);
+ case 2:
+ return asymmetric_verify(keyring[id], sig, siglen,
+ digest, digestlen);
+ }
+
+ return -EOPNOTSUPP;
}
diff --git a/security/integrity/digsig_asymmetric.c b/security/integrity/digsig_asymmetric.c
new file mode 100644
index 00000000000..b4754667659
--- /dev/null
+++ b/security/integrity/digsig_asymmetric.c
@@ -0,0 +1,115 @@
+/*
+ * Copyright (C) 2013 Intel Corporation
+ *
+ * Author:
+ * Dmitry Kasatkin <dmitry.kasatkin@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, version 2 of the License.
+ *
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/err.h>
+#include <linux/key-type.h>
+#include <crypto/public_key.h>
+#include <keys/asymmetric-type.h>
+
+#include "integrity.h"
+
+/*
+ * signature format v2 - for using with asymmetric keys
+ */
+struct signature_v2_hdr {
+ uint8_t version; /* signature format version */
+ uint8_t hash_algo; /* Digest algorithm [enum pkey_hash_algo] */
+ uint32_t keyid; /* IMA key identifier - not X509/PGP specific*/
+ uint16_t sig_size; /* signature size */
+ uint8_t sig[0]; /* signature payload */
+} __packed;
+
+/*
+ * Request an asymmetric key.
+ */
+static struct key *request_asymmetric_key(struct key *keyring, uint32_t keyid)
+{
+ struct key *key;
+ char name[12];
+
+ sprintf(name, "id:%x", keyid);
+
+ pr_debug("key search: \"%s\"\n", name);
+
+ if (keyring) {
+ /* search in specific keyring */
+ key_ref_t kref;
+ kref = keyring_search(make_key_ref(keyring, 1),
+ &key_type_asymmetric, name);
+ if (IS_ERR(kref))
+ key = ERR_CAST(kref);
+ else
+ key = key_ref_to_ptr(kref);
+ } else {
+ key = request_key(&key_type_asymmetric, name, NULL);
+ }
+
+ if (IS_ERR(key)) {
+ pr_warn("Request for unknown key '%s' err %ld\n",
+ name, PTR_ERR(key));
+ switch (PTR_ERR(key)) {
+ /* Hide some search errors */
+ case -EACCES:
+ case -ENOTDIR:
+ case -EAGAIN:
+ return ERR_PTR(-ENOKEY);
+ default:
+ return key;
+ }
+ }
+
+ pr_debug("%s() = 0 [%x]\n", __func__, key_serial(key));
+
+ return key;
+}
+
+int asymmetric_verify(struct key *keyring, const char *sig,
+ int siglen, const char *data, int datalen)
+{
+ struct public_key_signature pks;
+ struct signature_v2_hdr *hdr = (struct signature_v2_hdr *)sig;
+ struct key *key;
+ int ret = -ENOMEM;
+
+ if (siglen <= sizeof(*hdr))
+ return -EBADMSG;
+
+ siglen -= sizeof(*hdr);
+
+ if (siglen != __be16_to_cpu(hdr->sig_size))
+ return -EBADMSG;
+
+ if (hdr->hash_algo >= PKEY_HASH__LAST)
+ return -ENOPKG;
+
+ key = request_asymmetric_key(keyring, __be32_to_cpu(hdr->keyid));
+ if (IS_ERR(key))
+ return PTR_ERR(key);
+
+ memset(&pks, 0, sizeof(pks));
+
+ pks.pkey_hash_algo = hdr->hash_algo;
+ pks.digest = (u8 *)data;
+ pks.digest_size = datalen;
+ pks.nr_mpi = 1;
+ pks.rsa.s = mpi_read_raw_data(hdr->sig, siglen);
+
+ if (pks.rsa.s)
+ ret = verify_signature(key, &pks);
+
+ mpi_free(pks.rsa.s);
+ key_put(key);
+ pr_debug("%s() = %d\n", __func__, ret);
+ return ret;
+}
diff --git a/security/integrity/evm/Kconfig b/security/integrity/evm/Kconfig
index afbb59dd262..fea9749c375 100644
--- a/security/integrity/evm/Kconfig
+++ b/security/integrity/evm/Kconfig
@@ -11,3 +11,16 @@ config EVM
integrity attacks.
If you are unsure how to answer this question, answer N.
+
+config EVM_HMAC_VERSION
+ int "EVM HMAC version"
+ depends on EVM
+ default 2
+ help
+ This options adds EVM HMAC version support.
+ 1 - original version
+ 2 - add per filesystem unique identifier (UUID) (default)
+
+ WARNING: changing the HMAC calculation method or adding
+ additional info to the calculation, requires existing EVM
+ labeled file systems to be relabeled.
diff --git a/security/integrity/evm/evm.h b/security/integrity/evm/evm.h
index c885247ebcf..30bd1ec0232 100644
--- a/security/integrity/evm/evm.h
+++ b/security/integrity/evm/evm.h
@@ -24,6 +24,7 @@
extern int evm_initialized;
extern char *evm_hmac;
extern char *evm_hash;
+extern int evm_hmac_version;
extern struct crypto_shash *hmac_tfm;
extern struct crypto_shash *hash_tfm;
@@ -45,6 +46,5 @@ extern int evm_calc_hash(struct dentry *dentry, const char *req_xattr_name,
extern int evm_init_hmac(struct inode *inode, const struct xattr *xattr,
char *hmac_val);
extern int evm_init_secfs(void);
-extern void evm_cleanup_secfs(void);
#endif
diff --git a/security/integrity/evm/evm_crypto.c b/security/integrity/evm/evm_crypto.c
index 7dd538ef5b8..3bab89eb21d 100644
--- a/security/integrity/evm/evm_crypto.c
+++ b/security/integrity/evm/evm_crypto.c
@@ -110,6 +110,9 @@ static void hmac_add_misc(struct shash_desc *desc, struct inode *inode,
hmac_misc.gid = from_kgid(&init_user_ns, inode->i_gid);
hmac_misc.mode = inode->i_mode;
crypto_shash_update(desc, (const u8 *)&hmac_misc, sizeof hmac_misc);
+ if (evm_hmac_version > 1)
+ crypto_shash_update(desc, inode->i_sb->s_uuid,
+ sizeof(inode->i_sb->s_uuid));
crypto_shash_final(desc, digest);
}
diff --git a/security/integrity/evm/evm_main.c b/security/integrity/evm/evm_main.c
index eb5484504f5..cdbde176218 100644
--- a/security/integrity/evm/evm_main.c
+++ b/security/integrity/evm/evm_main.c
@@ -26,6 +26,7 @@ int evm_initialized;
char *evm_hmac = "hmac(sha1)";
char *evm_hash = "sha1";
+int evm_hmac_version = CONFIG_EVM_HMAC_VERSION;
char *evm_config_xattrnames[] = {
#ifdef CONFIG_SECURITY_SELINUX
@@ -427,15 +428,6 @@ err:
return error;
}
-static void __exit cleanup_evm(void)
-{
- evm_cleanup_secfs();
- if (hmac_tfm)
- crypto_free_shash(hmac_tfm);
- if (hash_tfm)
- crypto_free_shash(hash_tfm);
-}
-
/*
* evm_display_config - list the EVM protected security extended attributes
*/
diff --git a/security/integrity/evm/evm_secfs.c b/security/integrity/evm/evm_secfs.c
index ac762995057..30f670ad6ac 100644
--- a/security/integrity/evm/evm_secfs.c
+++ b/security/integrity/evm/evm_secfs.c
@@ -100,9 +100,3 @@ int __init evm_init_secfs(void)
error = -EFAULT;
return error;
}
-
-void __exit evm_cleanup_secfs(void)
-{
- if (evm_init_tpm)
- securityfs_remove(evm_init_tpm);
-}
diff --git a/security/integrity/iint.c b/security/integrity/iint.c
index d82a5a13d85..74522dbd10a 100644
--- a/security/integrity/iint.c
+++ b/security/integrity/iint.c
@@ -72,7 +72,10 @@ static void iint_free(struct integrity_iint_cache *iint)
{
iint->version = 0;
iint->flags = 0UL;
- iint->ima_status = INTEGRITY_UNKNOWN;
+ iint->ima_file_status = INTEGRITY_UNKNOWN;
+ iint->ima_mmap_status = INTEGRITY_UNKNOWN;
+ iint->ima_bprm_status = INTEGRITY_UNKNOWN;
+ iint->ima_module_status = INTEGRITY_UNKNOWN;
iint->evm_status = INTEGRITY_UNKNOWN;
kmem_cache_free(iint_cache, iint);
}
@@ -149,7 +152,10 @@ static void init_once(void *foo)
memset(iint, 0, sizeof *iint);
iint->version = 0;
iint->flags = 0UL;
- iint->ima_status = INTEGRITY_UNKNOWN;
+ iint->ima_file_status = INTEGRITY_UNKNOWN;
+ iint->ima_mmap_status = INTEGRITY_UNKNOWN;
+ iint->ima_bprm_status = INTEGRITY_UNKNOWN;
+ iint->ima_module_status = INTEGRITY_UNKNOWN;
iint->evm_status = INTEGRITY_UNKNOWN;
}
diff --git a/security/integrity/ima/ima.h b/security/integrity/ima/ima.h
index 079a85dc37b..a41c9c18e5e 100644
--- a/security/integrity/ima/ima.h
+++ b/security/integrity/ima/ima.h
@@ -84,11 +84,12 @@ void ima_fs_cleanup(void);
int ima_inode_alloc(struct inode *inode);
int ima_add_template_entry(struct ima_template_entry *entry, int violation,
const char *op, struct inode *inode);
-int ima_calc_hash(struct file *file, char *digest);
-int ima_calc_template_hash(int template_len, void *template, char *digest);
+int ima_calc_file_hash(struct file *file, char *digest);
+int ima_calc_buffer_hash(const void *data, int len, char *digest);
int ima_calc_boot_aggregate(char *digest);
void ima_add_violation(struct inode *inode, const unsigned char *filename,
const char *op, const char *cause);
+int ima_init_crypto(void);
/*
* used to protect h_table and sha_table
@@ -119,6 +120,7 @@ void ima_audit_measurement(struct integrity_iint_cache *iint,
int ima_store_template(struct ima_template_entry *entry, int violation,
struct inode *inode);
void ima_template_show(struct seq_file *m, void *e, enum ima_show_type show);
+const char *ima_d_path(struct path *path, char **pathbuf);
/* rbtree tree calls to lookup, insert, delete
* integrity data associated with an inode.
@@ -127,7 +129,7 @@ struct integrity_iint_cache *integrity_iint_insert(struct inode *inode);
struct integrity_iint_cache *integrity_iint_find(struct inode *inode);
/* IMA policy related functions */
-enum ima_hooks { FILE_CHECK = 1, FILE_MMAP, BPRM_CHECK, MODULE_CHECK, POST_SETATTR };
+enum ima_hooks { FILE_CHECK = 1, MMAP_CHECK, BPRM_CHECK, MODULE_CHECK, POST_SETATTR };
int ima_match_policy(struct inode *inode, enum ima_hooks func, int mask,
int flags);
@@ -142,13 +144,16 @@ void ima_delete_rules(void);
#define IMA_APPRAISE_MODULES 0x04
#ifdef CONFIG_IMA_APPRAISE
-int ima_appraise_measurement(struct integrity_iint_cache *iint,
+int ima_appraise_measurement(int func, struct integrity_iint_cache *iint,
struct file *file, const unsigned char *filename);
int ima_must_appraise(struct inode *inode, int mask, enum ima_hooks func);
void ima_update_xattr(struct integrity_iint_cache *iint, struct file *file);
+enum integrity_status ima_get_cache_status(struct integrity_iint_cache *iint,
+ int func);
#else
-static inline int ima_appraise_measurement(struct integrity_iint_cache *iint,
+static inline int ima_appraise_measurement(int func,
+ struct integrity_iint_cache *iint,
struct file *file,
const unsigned char *filename)
{
@@ -165,6 +170,12 @@ static inline void ima_update_xattr(struct integrity_iint_cache *iint,
struct file *file)
{
}
+
+static inline enum integrity_status ima_get_cache_status(struct integrity_iint_cache
+ *iint, int func)
+{
+ return INTEGRITY_UNKNOWN;
+}
#endif
/* LSM based policy rules require audit */
diff --git a/security/integrity/ima/ima_api.c b/security/integrity/ima/ima_api.c
index 0cea3db2165..d9030b29d84 100644
--- a/security/integrity/ima/ima_api.c
+++ b/security/integrity/ima/ima_api.c
@@ -50,8 +50,8 @@ int ima_store_template(struct ima_template_entry *entry,
entry->template_len = sizeof(entry->template);
if (!violation) {
- result = ima_calc_template_hash(entry->template_len,
- &entry->template,
+ result = ima_calc_buffer_hash(&entry->template,
+ entry->template_len,
entry->digest);
if (result < 0) {
integrity_audit_msg(AUDIT_INTEGRITY_PCR, inode,
@@ -100,12 +100,12 @@ err_out:
* ima_get_action - appraise & measure decision based on policy.
* @inode: pointer to inode to measure
* @mask: contains the permission mask (MAY_READ, MAY_WRITE, MAY_EXECUTE)
- * @function: calling function (FILE_CHECK, BPRM_CHECK, FILE_MMAP, MODULE_CHECK)
+ * @function: calling function (FILE_CHECK, BPRM_CHECK, MMAP_CHECK, MODULE_CHECK)
*
* The policy is defined in terms of keypairs:
* subj=, obj=, type=, func=, mask=, fsmagic=
* subj,obj, and type: are LSM specific.
- * func: FILE_CHECK | BPRM_CHECK | FILE_MMAP | MODULE_CHECK
+ * func: FILE_CHECK | BPRM_CHECK | MMAP_CHECK | MODULE_CHECK
* mask: contains the permission mask
* fsmagic: hex value
*
@@ -148,7 +148,7 @@ int ima_collect_measurement(struct integrity_iint_cache *iint,
u64 i_version = file->f_dentry->d_inode->i_version;
iint->ima_xattr.type = IMA_XATTR_DIGEST;
- result = ima_calc_hash(file, iint->ima_xattr.digest);
+ result = ima_calc_file_hash(file, iint->ima_xattr.digest);
if (!result) {
iint->version = i_version;
iint->flags |= IMA_COLLECTED;
@@ -237,3 +237,20 @@ void ima_audit_measurement(struct integrity_iint_cache *iint,
iint->flags |= IMA_AUDITED;
}
+
+const char *ima_d_path(struct path *path, char **pathbuf)
+{
+ char *pathname = NULL;
+
+ /* We will allow 11 spaces for ' (deleted)' to be appended */
+ *pathbuf = kmalloc(PATH_MAX + 11, GFP_KERNEL);
+ if (*pathbuf) {
+ pathname = d_path(path, *pathbuf, PATH_MAX + 11);
+ if (IS_ERR(pathname)) {
+ kfree(*pathbuf);
+ *pathbuf = NULL;
+ pathname = NULL;
+ }
+ }
+ return pathname;
+}
diff --git a/security/integrity/ima/ima_appraise.c b/security/integrity/ima/ima_appraise.c
index bdc8ba1d1d2..2d4becab891 100644
--- a/security/integrity/ima/ima_appraise.c
+++ b/security/integrity/ima/ima_appraise.c
@@ -42,12 +42,69 @@ int ima_must_appraise(struct inode *inode, int mask, enum ima_hooks func)
return ima_match_policy(inode, func, mask, IMA_APPRAISE);
}
-static void ima_fix_xattr(struct dentry *dentry,
+static int ima_fix_xattr(struct dentry *dentry,
struct integrity_iint_cache *iint)
{
iint->ima_xattr.type = IMA_XATTR_DIGEST;
- __vfs_setxattr_noperm(dentry, XATTR_NAME_IMA, (u8 *)&iint->ima_xattr,
- sizeof iint->ima_xattr, 0);
+ return __vfs_setxattr_noperm(dentry, XATTR_NAME_IMA,
+ (u8 *)&iint->ima_xattr,
+ sizeof(iint->ima_xattr), 0);
+}
+
+/* Return specific func appraised cached result */
+enum integrity_status ima_get_cache_status(struct integrity_iint_cache *iint,
+ int func)
+{
+ switch(func) {
+ case MMAP_CHECK:
+ return iint->ima_mmap_status;
+ case BPRM_CHECK:
+ return iint->ima_bprm_status;
+ case MODULE_CHECK:
+ return iint->ima_module_status;
+ case FILE_CHECK:
+ default:
+ return iint->ima_file_status;
+ }
+}
+
+static void ima_set_cache_status(struct integrity_iint_cache *iint,
+ int func, enum integrity_status status)
+{
+ switch(func) {
+ case MMAP_CHECK:
+ iint->ima_mmap_status = status;
+ break;
+ case BPRM_CHECK:
+ iint->ima_bprm_status = status;
+ break;
+ case MODULE_CHECK:
+ iint->ima_module_status = status;
+ break;
+ case FILE_CHECK:
+ default:
+ iint->ima_file_status = status;
+ break;
+ }
+}
+
+static void ima_cache_flags(struct integrity_iint_cache *iint, int func)
+{
+ switch(func) {
+ case MMAP_CHECK:
+ iint->flags |= (IMA_MMAP_APPRAISED | IMA_APPRAISED);
+ break;
+ case BPRM_CHECK:
+ iint->flags |= (IMA_BPRM_APPRAISED | IMA_APPRAISED);
+ break;
+ case MODULE_CHECK:
+ iint->flags |= (IMA_MODULE_APPRAISED | IMA_APPRAISED);
+ break;
+ case FILE_CHECK:
+ default:
+ iint->flags |= (IMA_FILE_APPRAISED | IMA_APPRAISED);
+ break;
+ }
}
/*
@@ -58,7 +115,7 @@ static void ima_fix_xattr(struct dentry *dentry,
*
* Return 0 on success, error code otherwise
*/
-int ima_appraise_measurement(struct integrity_iint_cache *iint,
+int ima_appraise_measurement(int func, struct integrity_iint_cache *iint,
struct file *file, const unsigned char *filename)
{
struct dentry *dentry = file->f_dentry;
@@ -74,9 +131,6 @@ int ima_appraise_measurement(struct integrity_iint_cache *iint,
if (!inode->i_op->getxattr)
return INTEGRITY_UNKNOWN;
- if (iint->flags & IMA_APPRAISED)
- return iint->ima_status;
-
rc = vfs_getxattr_alloc(dentry, XATTR_NAME_IMA, (char **)&xattr_value,
0, GFP_NOFS);
if (rc <= 0) {
@@ -98,19 +152,18 @@ int ima_appraise_measurement(struct integrity_iint_cache *iint,
cause = "invalid-HMAC";
goto out;
}
-
switch (xattr_value->type) {
case IMA_XATTR_DIGEST:
+ if (iint->flags & IMA_DIGSIG_REQUIRED) {
+ cause = "IMA signature required";
+ status = INTEGRITY_FAIL;
+ break;
+ }
rc = memcmp(xattr_value->digest, iint->ima_xattr.digest,
IMA_DIGEST_SIZE);
if (rc) {
cause = "invalid-hash";
status = INTEGRITY_FAIL;
- print_hex_dump_bytes("security.ima: ", DUMP_PREFIX_NONE,
- xattr_value, sizeof(*xattr_value));
- print_hex_dump_bytes("collected: ", DUMP_PREFIX_NONE,
- (u8 *)&iint->ima_xattr,
- sizeof iint->ima_xattr);
break;
}
status = INTEGRITY_PASS;
@@ -141,15 +194,15 @@ out:
if ((ima_appraise & IMA_APPRAISE_FIX) &&
(!xattr_value ||
xattr_value->type != EVM_IMA_XATTR_DIGSIG)) {
- ima_fix_xattr(dentry, iint);
- status = INTEGRITY_PASS;
+ if (!ima_fix_xattr(dentry, iint))
+ status = INTEGRITY_PASS;
}
integrity_audit_msg(AUDIT_INTEGRITY_DATA, inode, filename,
op, cause, rc, 0);
} else {
- iint->flags |= IMA_APPRAISED;
+ ima_cache_flags(iint, func);
}
- iint->ima_status = status;
+ ima_set_cache_status(iint, func, status);
kfree(xattr_value);
return status;
}
@@ -195,10 +248,11 @@ void ima_inode_post_setattr(struct dentry *dentry)
must_appraise = ima_must_appraise(inode, MAY_ACCESS, POST_SETATTR);
iint = integrity_iint_find(inode);
if (iint) {
+ iint->flags &= ~(IMA_APPRAISE | IMA_APPRAISED |
+ IMA_APPRAISE_SUBMASK | IMA_APPRAISED_SUBMASK |
+ IMA_ACTION_FLAGS);
if (must_appraise)
iint->flags |= IMA_APPRAISE;
- else
- iint->flags &= ~(IMA_APPRAISE | IMA_APPRAISED);
}
if (!must_appraise)
rc = inode->i_op->removexattr(dentry, XATTR_NAME_IMA);
diff --git a/security/integrity/ima/ima_crypto.c b/security/integrity/ima/ima_crypto.c
index b21ee5b5495..b691e0f3830 100644
--- a/security/integrity/ima/ima_crypto.c
+++ b/security/integrity/ima/ima_crypto.c
@@ -19,38 +19,41 @@
#include <linux/scatterlist.h>
#include <linux/err.h>
#include <linux/slab.h>
+#include <crypto/hash.h>
#include "ima.h"
-static int init_desc(struct hash_desc *desc)
+static struct crypto_shash *ima_shash_tfm;
+
+int ima_init_crypto(void)
{
- int rc;
+ long rc;
- desc->tfm = crypto_alloc_hash(ima_hash, 0, CRYPTO_ALG_ASYNC);
- if (IS_ERR(desc->tfm)) {
- pr_info("IMA: failed to load %s transform: %ld\n",
- ima_hash, PTR_ERR(desc->tfm));
- rc = PTR_ERR(desc->tfm);
+ ima_shash_tfm = crypto_alloc_shash(ima_hash, 0, 0);
+ if (IS_ERR(ima_shash_tfm)) {
+ rc = PTR_ERR(ima_shash_tfm);
+ pr_err("Can not allocate %s (reason: %ld)\n", ima_hash, rc);
return rc;
}
- desc->flags = 0;
- rc = crypto_hash_init(desc);
- if (rc)
- crypto_free_hash(desc->tfm);
- return rc;
+ return 0;
}
/*
* Calculate the MD5/SHA1 file digest
*/
-int ima_calc_hash(struct file *file, char *digest)
+int ima_calc_file_hash(struct file *file, char *digest)
{
- struct hash_desc desc;
- struct scatterlist sg[1];
loff_t i_size, offset = 0;
char *rbuf;
int rc, read = 0;
+ struct {
+ struct shash_desc shash;
+ char ctx[crypto_shash_descsize(ima_shash_tfm)];
+ } desc;
- rc = init_desc(&desc);
+ desc.shash.tfm = ima_shash_tfm;
+ desc.shash.flags = 0;
+
+ rc = crypto_shash_init(&desc.shash);
if (rc != 0)
return rc;
@@ -75,41 +78,34 @@ int ima_calc_hash(struct file *file, char *digest)
if (rbuf_len == 0)
break;
offset += rbuf_len;
- sg_init_one(sg, rbuf, rbuf_len);
- rc = crypto_hash_update(&desc, sg, rbuf_len);
+ rc = crypto_shash_update(&desc.shash, rbuf, rbuf_len);
if (rc)
break;
}
kfree(rbuf);
if (!rc)
- rc = crypto_hash_final(&desc, digest);
+ rc = crypto_shash_final(&desc.shash, digest);
if (read)
file->f_mode &= ~FMODE_READ;
out:
- crypto_free_hash(desc.tfm);
return rc;
}
/*
- * Calculate the hash of a given template
+ * Calculate the hash of a given buffer
*/
-int ima_calc_template_hash(int template_len, void *template, char *digest)
+int ima_calc_buffer_hash(const void *data, int len, char *digest)
{
- struct hash_desc desc;
- struct scatterlist sg[1];
- int rc;
+ struct {
+ struct shash_desc shash;
+ char ctx[crypto_shash_descsize(ima_shash_tfm)];
+ } desc;
- rc = init_desc(&desc);
- if (rc != 0)
- return rc;
+ desc.shash.tfm = ima_shash_tfm;
+ desc.shash.flags = 0;
- sg_init_one(sg, template, template_len);
- rc = crypto_hash_update(&desc, sg, template_len);
- if (!rc)
- rc = crypto_hash_final(&desc, digest);
- crypto_free_hash(desc.tfm);
- return rc;
+ return crypto_shash_digest(&desc.shash, data, len, digest);
}
static void __init ima_pcrread(int idx, u8 *pcr)
@@ -126,12 +122,17 @@ static void __init ima_pcrread(int idx, u8 *pcr)
*/
int __init ima_calc_boot_aggregate(char *digest)
{
- struct hash_desc desc;
- struct scatterlist sg;
u8 pcr_i[IMA_DIGEST_SIZE];
int rc, i;
+ struct {
+ struct shash_desc shash;
+ char ctx[crypto_shash_descsize(ima_shash_tfm)];
+ } desc;
+
+ desc.shash.tfm = ima_shash_tfm;
+ desc.shash.flags = 0;
- rc = init_desc(&desc);
+ rc = crypto_shash_init(&desc.shash);
if (rc != 0)
return rc;
@@ -139,11 +140,9 @@ int __init ima_calc_boot_aggregate(char *digest)
for (i = TPM_PCR0; i < TPM_PCR8; i++) {
ima_pcrread(i, pcr_i);
/* now accumulate with current aggregate */
- sg_init_one(&sg, pcr_i, IMA_DIGEST_SIZE);
- rc = crypto_hash_update(&desc, &sg, IMA_DIGEST_SIZE);
+ rc = crypto_shash_update(&desc.shash, pcr_i, IMA_DIGEST_SIZE);
}
if (!rc)
- crypto_hash_final(&desc, digest);
- crypto_free_hash(desc.tfm);
+ crypto_shash_final(&desc.shash, digest);
return rc;
}
diff --git a/security/integrity/ima/ima_init.c b/security/integrity/ima/ima_init.c
index b5dfd534f13..162ea723db3 100644
--- a/security/integrity/ima/ima_init.c
+++ b/security/integrity/ima/ima_init.c
@@ -85,6 +85,9 @@ int __init ima_init(void)
if (!ima_used_chip)
pr_info("IMA: No TPM chip found, activating TPM-bypass!\n");
+ rc = ima_init_crypto();
+ if (rc)
+ return rc;
ima_add_boot_aggregate(); /* boot aggregate must be first entry */
ima_init_policy();
diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c
index dba965de90d..5127afcc4b8 100644
--- a/security/integrity/ima/ima_main.c
+++ b/security/integrity/ima/ima_main.c
@@ -61,7 +61,8 @@ static void ima_rdwr_violation_check(struct file *file)
fmode_t mode = file->f_mode;
int must_measure;
bool send_tomtou = false, send_writers = false;
- unsigned char *pathname = NULL, *pathbuf = NULL;
+ char *pathbuf = NULL;
+ const char *pathname;
if (!S_ISREG(inode->i_mode) || !ima_initialized)
return;
@@ -86,22 +87,15 @@ out:
if (!send_tomtou && !send_writers)
return;
- /* We will allow 11 spaces for ' (deleted)' to be appended */
- pathbuf = kmalloc(PATH_MAX + 11, GFP_KERNEL);
- if (pathbuf) {
- pathname = d_path(&file->f_path, pathbuf, PATH_MAX + 11);
- if (IS_ERR(pathname))
- pathname = NULL;
- else if (strlen(pathname) > IMA_EVENT_NAME_LEN_MAX)
- pathname = NULL;
- }
+ pathname = ima_d_path(&file->f_path, &pathbuf);
+ if (!pathname || strlen(pathname) > IMA_EVENT_NAME_LEN_MAX)
+ pathname = dentry->d_name.name;
+
if (send_tomtou)
- ima_add_violation(inode,
- !pathname ? dentry->d_name.name : pathname,
+ ima_add_violation(inode, pathname,
"invalid_pcr", "ToMToU");
if (send_writers)
- ima_add_violation(inode,
- !pathname ? dentry->d_name.name : pathname,
+ ima_add_violation(inode, pathname,
"invalid_pcr", "open_writers");
kfree(pathbuf);
}
@@ -145,25 +139,31 @@ void ima_file_free(struct file *file)
ima_check_last_writer(iint, inode, file);
}
-static int process_measurement(struct file *file, const unsigned char *filename,
+static int process_measurement(struct file *file, const char *filename,
int mask, int function)
{
struct inode *inode = file->f_dentry->d_inode;
struct integrity_iint_cache *iint;
- unsigned char *pathname = NULL, *pathbuf = NULL;
- int rc = -ENOMEM, action, must_appraise;
+ char *pathbuf = NULL;
+ const char *pathname = NULL;
+ int rc = -ENOMEM, action, must_appraise, _func;
if (!ima_initialized || !S_ISREG(inode->i_mode))
return 0;
- /* Determine if in appraise/audit/measurement policy,
- * returns IMA_MEASURE, IMA_APPRAISE, IMA_AUDIT bitmask. */
+ /* Return an IMA_MEASURE, IMA_APPRAISE, IMA_AUDIT action
+ * bitmask based on the appraise/audit/measurement policy.
+ * Included is the appraise submask.
+ */
action = ima_get_action(inode, mask, function);
if (!action)
return 0;
must_appraise = action & IMA_APPRAISE;
+ /* Is the appraise rule hook specific? */
+ _func = (action & IMA_FILE_APPRAISE) ? FILE_CHECK : function;
+
mutex_lock(&inode->i_mutex);
iint = integrity_inode_get(inode);
@@ -171,44 +171,45 @@ static int process_measurement(struct file *file, const unsigned char *filename,
goto out;
/* Determine if already appraised/measured based on bitmask
- * (IMA_MEASURE, IMA_MEASURED, IMA_APPRAISE, IMA_APPRAISED,
- * IMA_AUDIT, IMA_AUDITED) */
+ * (IMA_MEASURE, IMA_MEASURED, IMA_XXXX_APPRAISE, IMA_XXXX_APPRAISED,
+ * IMA_AUDIT, IMA_AUDITED)
+ */
iint->flags |= action;
+ action &= IMA_DO_MASK;
action &= ~((iint->flags & IMA_DONE_MASK) >> 1);
/* Nothing to do, just return existing appraised status */
if (!action) {
- if (iint->flags & IMA_APPRAISED)
- rc = iint->ima_status;
- goto out;
+ if (must_appraise)
+ rc = ima_get_cache_status(iint, _func);
+ goto out_digsig;
}
rc = ima_collect_measurement(iint, file);
if (rc != 0)
- goto out;
+ goto out_digsig;
+
+ if (function != BPRM_CHECK)
+ pathname = ima_d_path(&file->f_path, &pathbuf);
+
+ if (!pathname)
+ pathname = filename;
- if (function != BPRM_CHECK) {
- /* We will allow 11 spaces for ' (deleted)' to be appended */
- pathbuf = kmalloc(PATH_MAX + 11, GFP_KERNEL);
- if (pathbuf) {
- pathname =
- d_path(&file->f_path, pathbuf, PATH_MAX + 11);
- if (IS_ERR(pathname))
- pathname = NULL;
- }
- }
if (action & IMA_MEASURE)
- ima_store_measurement(iint, file,
- !pathname ? filename : pathname);
- if (action & IMA_APPRAISE)
- rc = ima_appraise_measurement(iint, file,
- !pathname ? filename : pathname);
+ ima_store_measurement(iint, file, pathname);
+ if (action & IMA_APPRAISE_SUBMASK)
+ rc = ima_appraise_measurement(_func, iint, file, pathname);
if (action & IMA_AUDIT)
- ima_audit_measurement(iint, !pathname ? filename : pathname);
+ ima_audit_measurement(iint, pathname);
kfree(pathbuf);
+out_digsig:
+ if ((mask & MAY_WRITE) && (iint->flags & IMA_DIGSIG))
+ rc = -EACCES;
out:
mutex_unlock(&inode->i_mutex);
- return (rc && must_appraise) ? -EACCES : 0;
+ if ((rc && must_appraise) && (ima_appraise & IMA_APPRAISE_ENFORCE))
+ return -EACCES;
+ return 0;
}
/**
@@ -219,19 +220,15 @@ out:
* Measure files being mmapped executable based on the ima_must_measure()
* policy decision.
*
- * Return 0 on success, an error code on failure.
- * (Based on the results of appraise_measurement().)
+ * On success return 0. On integrity appraisal error, assuming the file
+ * is in policy and IMA-appraisal is in enforcing mode, return -EACCES.
*/
int ima_file_mmap(struct file *file, unsigned long prot)
{
- int rc = 0;
-
- if (!file)
- return 0;
- if (prot & PROT_EXEC)
- rc = process_measurement(file, file->f_dentry->d_name.name,
- MAY_EXEC, FILE_MMAP);
- return (ima_appraise & IMA_APPRAISE_ENFORCE) ? rc : 0;
+ if (file && (prot & PROT_EXEC))
+ return process_measurement(file, file->f_dentry->d_name.name,
+ MAY_EXEC, MMAP_CHECK);
+ return 0;
}
/**
@@ -244,18 +241,15 @@ int ima_file_mmap(struct file *file, unsigned long prot)
* So we can be certain that what we verify and measure here is actually
* what is being executed.
*
- * Return 0 on success, an error code on failure.
- * (Based on the results of appraise_measurement().)
+ * On success return 0. On integrity appraisal error, assuming the file
+ * is in policy and IMA-appraisal is in enforcing mode, return -EACCES.
*/
int ima_bprm_check(struct linux_binprm *bprm)
{
- int rc;
-
- rc = process_measurement(bprm->file,
+ return process_measurement(bprm->file,
(strcmp(bprm->filename, bprm->interp) == 0) ?
bprm->filename : bprm->interp,
MAY_EXEC, BPRM_CHECK);
- return (ima_appraise & IMA_APPRAISE_ENFORCE) ? rc : 0;
}
/**
@@ -265,18 +259,15 @@ int ima_bprm_check(struct linux_binprm *bprm)
*
* Measure files based on the ima_must_measure() policy decision.
*
- * Always return 0 and audit dentry_open failures.
- * (Return code will be based upon measurement appraisal.)
+ * On success return 0. On integrity appraisal error, assuming the file
+ * is in policy and IMA-appraisal is in enforcing mode, return -EACCES.
*/
int ima_file_check(struct file *file, int mask)
{
- int rc;
-
ima_rdwr_violation_check(file);
- rc = process_measurement(file, file->f_dentry->d_name.name,
+ return process_measurement(file, file->f_dentry->d_name.name,
mask & (MAY_READ | MAY_WRITE | MAY_EXEC),
FILE_CHECK);
- return (ima_appraise & IMA_APPRAISE_ENFORCE) ? rc : 0;
}
EXPORT_SYMBOL_GPL(ima_file_check);
@@ -286,23 +277,20 @@ EXPORT_SYMBOL_GPL(ima_file_check);
*
* Measure/appraise kernel modules based on policy.
*
- * Always return 0 and audit dentry_open failures.
- * Return code is based upon measurement appraisal.
+ * On success return 0. On integrity appraisal error, assuming the file
+ * is in policy and IMA-appraisal is in enforcing mode, return -EACCES.
*/
int ima_module_check(struct file *file)
{
- int rc = 0;
-
if (!file) {
- if (ima_appraise & IMA_APPRAISE_MODULES) {
#ifndef CONFIG_MODULE_SIG_FORCE
- rc = -EACCES; /* INTEGRITY_UNKNOWN */
+ if (ima_appraise & IMA_APPRAISE_MODULES)
+ return -EACCES; /* INTEGRITY_UNKNOWN */
#endif
- }
- } else
- rc = process_measurement(file, file->f_dentry->d_name.name,
- MAY_EXEC, MODULE_CHECK);
- return (ima_appraise & IMA_APPRAISE_ENFORCE) ? rc : 0;
+ return 0; /* We rely on module signature checking */
+ }
+ return process_measurement(file, file->f_dentry->d_name.name,
+ MAY_EXEC, MODULE_CHECK);
}
static int __init init_ima(void)
diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c
index 479fca940bb..b27535a13a7 100644
--- a/security/integrity/ima/ima_policy.c
+++ b/security/integrity/ima/ima_policy.c
@@ -16,6 +16,7 @@
#include <linux/magic.h>
#include <linux/parser.h>
#include <linux/slab.h>
+#include <linux/genhd.h>
#include "ima.h"
@@ -25,6 +26,7 @@
#define IMA_FSMAGIC 0x0004
#define IMA_UID 0x0008
#define IMA_FOWNER 0x0010
+#define IMA_FSUUID 0x0020
#define UNKNOWN 0
#define MEASURE 0x0001 /* same as IMA_MEASURE */
@@ -45,10 +47,12 @@ struct ima_rule_entry {
enum ima_hooks func;
int mask;
unsigned long fsmagic;
+ u8 fsuuid[16];
kuid_t uid;
kuid_t fowner;
struct {
void *rule; /* LSM file metadata specific */
+ void *args_p; /* audit value */
int type; /* audit type */
} lsm[MAX_LSM_RULES];
};
@@ -74,7 +78,7 @@ static struct ima_rule_entry default_rules[] = {
{.action = DONT_MEASURE,.fsmagic = BINFMTFS_MAGIC,.flags = IMA_FSMAGIC},
{.action = DONT_MEASURE,.fsmagic = SECURITYFS_MAGIC,.flags = IMA_FSMAGIC},
{.action = DONT_MEASURE,.fsmagic = SELINUX_MAGIC,.flags = IMA_FSMAGIC},
- {.action = MEASURE,.func = FILE_MMAP,.mask = MAY_EXEC,
+ {.action = MEASURE,.func = MMAP_CHECK,.mask = MAY_EXEC,
.flags = IMA_FUNC | IMA_MASK},
{.action = MEASURE,.func = BPRM_CHECK,.mask = MAY_EXEC,
.flags = IMA_FUNC | IMA_MASK},
@@ -119,6 +123,35 @@ static int __init default_appraise_policy_setup(char *str)
}
__setup("ima_appraise_tcb", default_appraise_policy_setup);
+/*
+ * Although the IMA policy does not change, the LSM policy can be
+ * reloaded, leaving the IMA LSM based rules referring to the old,
+ * stale LSM policy.
+ *
+ * Update the IMA LSM based rules to reflect the reloaded LSM policy.
+ * We assume the rules still exist; and BUG_ON() if they don't.
+ */
+static void ima_lsm_update_rules(void)
+{
+ struct ima_rule_entry *entry, *tmp;
+ int result;
+ int i;
+
+ mutex_lock(&ima_rules_mutex);
+ list_for_each_entry_safe(entry, tmp, &ima_policy_rules, list) {
+ for (i = 0; i < MAX_LSM_RULES; i++) {
+ if (!entry->lsm[i].rule)
+ continue;
+ result = security_filter_rule_init(entry->lsm[i].type,
+ Audit_equal,
+ entry->lsm[i].args_p,
+ &entry->lsm[i].rule);
+ BUG_ON(!entry->lsm[i].rule);
+ }
+ }
+ mutex_unlock(&ima_rules_mutex);
+}
+
/**
* ima_match_rules - determine whether an inode matches the measure rule.
* @rule: a pointer to a rule
@@ -142,6 +175,9 @@ static bool ima_match_rules(struct ima_rule_entry *rule,
if ((rule->flags & IMA_FSMAGIC)
&& rule->fsmagic != inode->i_sb->s_magic)
return false;
+ if ((rule->flags & IMA_FSUUID) &&
+ memcmp(rule->fsuuid, inode->i_sb->s_uuid, sizeof(rule->fsuuid)))
+ return false;
if ((rule->flags & IMA_UID) && !uid_eq(rule->uid, cred->uid))
return false;
if ((rule->flags & IMA_FOWNER) && !uid_eq(rule->fowner, inode->i_uid))
@@ -149,10 +185,11 @@ static bool ima_match_rules(struct ima_rule_entry *rule,
for (i = 0; i < MAX_LSM_RULES; i++) {
int rc = 0;
u32 osid, sid;
+ int retried = 0;
if (!rule->lsm[i].rule)
continue;
-
+retry:
switch (i) {
case LSM_OBJ_USER:
case LSM_OBJ_ROLE:
@@ -176,12 +213,39 @@ static bool ima_match_rules(struct ima_rule_entry *rule,
default:
break;
}
+ if ((rc < 0) && (!retried)) {
+ retried = 1;
+ ima_lsm_update_rules();
+ goto retry;
+ }
if (!rc)
return false;
}
return true;
}
+/*
+ * In addition to knowing that we need to appraise the file in general,
+ * we need to differentiate between calling hooks, for hook specific rules.
+ */
+static int get_subaction(struct ima_rule_entry *rule, int func)
+{
+ if (!(rule->flags & IMA_FUNC))
+ return IMA_FILE_APPRAISE;
+
+ switch(func) {
+ case MMAP_CHECK:
+ return IMA_MMAP_APPRAISE;
+ case BPRM_CHECK:
+ return IMA_BPRM_APPRAISE;
+ case MODULE_CHECK:
+ return IMA_MODULE_APPRAISE;
+ case FILE_CHECK:
+ default:
+ return IMA_FILE_APPRAISE;
+ }
+}
+
/**
* ima_match_policy - decision based on LSM and other conditions
* @inode: pointer to an inode for which the policy decision is being made
@@ -209,7 +273,12 @@ int ima_match_policy(struct inode *inode, enum ima_hooks func, int mask,
if (!ima_match_rules(entry, inode, func, mask))
continue;
+ action |= entry->flags & IMA_ACTION_FLAGS;
+
action |= entry->action & IMA_DO_MASK;
+ if (entry->action & IMA_APPRAISE)
+ action |= get_subaction(entry, func);
+
if (entry->action & IMA_DO_MASK)
actmask &= ~(entry->action | entry->action << 1);
else
@@ -282,7 +351,8 @@ enum {
Opt_audit,
Opt_obj_user, Opt_obj_role, Opt_obj_type,
Opt_subj_user, Opt_subj_role, Opt_subj_type,
- Opt_func, Opt_mask, Opt_fsmagic, Opt_uid, Opt_fowner
+ Opt_func, Opt_mask, Opt_fsmagic, Opt_uid, Opt_fowner,
+ Opt_appraise_type, Opt_fsuuid
};
static match_table_t policy_tokens = {
@@ -300,25 +370,35 @@ static match_table_t policy_tokens = {
{Opt_func, "func=%s"},
{Opt_mask, "mask=%s"},
{Opt_fsmagic, "fsmagic=%s"},
+ {Opt_fsuuid, "fsuuid=%s"},
{Opt_uid, "uid=%s"},
{Opt_fowner, "fowner=%s"},
+ {Opt_appraise_type, "appraise_type=%s"},
{Opt_err, NULL}
};
static int ima_lsm_rule_init(struct ima_rule_entry *entry,
- char *args, int lsm_rule, int audit_type)
+ substring_t *args, int lsm_rule, int audit_type)
{
int result;
if (entry->lsm[lsm_rule].rule)
return -EINVAL;
+ entry->lsm[lsm_rule].args_p = match_strdup(args);
+ if (!entry->lsm[lsm_rule].args_p)
+ return -ENOMEM;
+
entry->lsm[lsm_rule].type = audit_type;
result = security_filter_rule_init(entry->lsm[lsm_rule].type,
- Audit_equal, args,
+ Audit_equal,
+ entry->lsm[lsm_rule].args_p,
&entry->lsm[lsm_rule].rule);
- if (!entry->lsm[lsm_rule].rule)
+ if (!entry->lsm[lsm_rule].rule) {
+ kfree(entry->lsm[lsm_rule].args_p);
return -EINVAL;
+ }
+
return result;
}
@@ -404,8 +484,9 @@ static int ima_parse_rule(char *rule, struct ima_rule_entry *entry)
entry->func = FILE_CHECK;
else if (strcmp(args[0].from, "MODULE_CHECK") == 0)
entry->func = MODULE_CHECK;
- else if (strcmp(args[0].from, "FILE_MMAP") == 0)
- entry->func = FILE_MMAP;
+ else if ((strcmp(args[0].from, "FILE_MMAP") == 0)
+ || (strcmp(args[0].from, "MMAP_CHECK") == 0))
+ entry->func = MMAP_CHECK;
else if (strcmp(args[0].from, "BPRM_CHECK") == 0)
entry->func = BPRM_CHECK;
else
@@ -445,6 +526,19 @@ static int ima_parse_rule(char *rule, struct ima_rule_entry *entry)
if (!result)
entry->flags |= IMA_FSMAGIC;
break;
+ case Opt_fsuuid:
+ ima_log_string(ab, "fsuuid", args[0].from);
+
+ if (memchr_inv(entry->fsuuid, 0x00,
+ sizeof(entry->fsuuid))) {
+ result = -EINVAL;
+ break;
+ }
+
+ part_pack_uuid(args[0].from, entry->fsuuid);
+ entry->flags |= IMA_FSUUID;
+ result = 0;
+ break;
case Opt_uid:
ima_log_string(ab, "uid", args[0].from);
@@ -481,40 +575,52 @@ static int ima_parse_rule(char *rule, struct ima_rule_entry *entry)
break;
case Opt_obj_user:
ima_log_string(ab, "obj_user", args[0].from);
- result = ima_lsm_rule_init(entry, args[0].from,
+ result = ima_lsm_rule_init(entry, args,
LSM_OBJ_USER,
AUDIT_OBJ_USER);
break;
case Opt_obj_role:
ima_log_string(ab, "obj_role", args[0].from);
- result = ima_lsm_rule_init(entry, args[0].from,
+ result = ima_lsm_rule_init(entry, args,
LSM_OBJ_ROLE,
AUDIT_OBJ_ROLE);
break;
case Opt_obj_type:
ima_log_string(ab, "obj_type", args[0].from);
- result = ima_lsm_rule_init(entry, args[0].from,
+ result = ima_lsm_rule_init(entry, args,
LSM_OBJ_TYPE,
AUDIT_OBJ_TYPE);
break;
case Opt_subj_user:
ima_log_string(ab, "subj_user", args[0].from);
- result = ima_lsm_rule_init(entry, args[0].from,
+ result = ima_lsm_rule_init(entry, args,
LSM_SUBJ_USER,
AUDIT_SUBJ_USER);
break;
case Opt_subj_role:
ima_log_string(ab, "subj_role", args[0].from);
- result = ima_lsm_rule_init(entry, args[0].from,
+ result = ima_lsm_rule_init(entry, args,
LSM_SUBJ_ROLE,
AUDIT_SUBJ_ROLE);
break;
case Opt_subj_type:
ima_log_string(ab, "subj_type", args[0].from);
- result = ima_lsm_rule_init(entry, args[0].from,
+ result = ima_lsm_rule_init(entry, args,
LSM_SUBJ_TYPE,
AUDIT_SUBJ_TYPE);
break;
+ case Opt_appraise_type:
+ if (entry->action != APPRAISE) {
+ result = -EINVAL;
+ break;
+ }
+
+ ima_log_string(ab, "appraise_type", args[0].from);
+ if ((strcmp(args[0].from, "imasig")) == 0)
+ entry->flags |= IMA_DIGSIG_REQUIRED;
+ else
+ result = -EINVAL;
+ break;
case Opt_err:
ima_log_string(ab, "UNKNOWN", p);
result = -EINVAL;
@@ -590,9 +696,13 @@ ssize_t ima_parse_add_rule(char *rule)
void ima_delete_rules(void)
{
struct ima_rule_entry *entry, *tmp;
+ int i;
mutex_lock(&ima_rules_mutex);
list_for_each_entry_safe(entry, tmp, &ima_policy_rules, list) {
+ for (i = 0; i < MAX_LSM_RULES; i++)
+ kfree(entry->lsm[i].args_p);
+
list_del(&entry->list);
kfree(entry);
}
diff --git a/security/integrity/integrity.h b/security/integrity/integrity.h
index e9db763a875..84c37c4db91 100644
--- a/security/integrity/integrity.h
+++ b/security/integrity/integrity.h
@@ -14,23 +14,41 @@
#include <linux/types.h>
#include <linux/integrity.h>
#include <crypto/sha.h>
+#include <linux/key.h>
/* iint action cache flags */
-#define IMA_MEASURE 0x0001
-#define IMA_MEASURED 0x0002
-#define IMA_APPRAISE 0x0004
-#define IMA_APPRAISED 0x0008
-/*#define IMA_COLLECT 0x0010 do not use this flag */
-#define IMA_COLLECTED 0x0020
-#define IMA_AUDIT 0x0040
-#define IMA_AUDITED 0x0080
+#define IMA_MEASURE 0x00000001
+#define IMA_MEASURED 0x00000002
+#define IMA_APPRAISE 0x00000004
+#define IMA_APPRAISED 0x00000008
+/*#define IMA_COLLECT 0x00000010 do not use this flag */
+#define IMA_COLLECTED 0x00000020
+#define IMA_AUDIT 0x00000040
+#define IMA_AUDITED 0x00000080
/* iint cache flags */
-#define IMA_DIGSIG 0x0100
+#define IMA_ACTION_FLAGS 0xff000000
+#define IMA_DIGSIG 0x01000000
+#define IMA_DIGSIG_REQUIRED 0x02000000
-#define IMA_DO_MASK (IMA_MEASURE | IMA_APPRAISE | IMA_AUDIT)
-#define IMA_DONE_MASK (IMA_MEASURED | IMA_APPRAISED | IMA_AUDITED \
- | IMA_COLLECTED)
+#define IMA_DO_MASK (IMA_MEASURE | IMA_APPRAISE | IMA_AUDIT | \
+ IMA_APPRAISE_SUBMASK)
+#define IMA_DONE_MASK (IMA_MEASURED | IMA_APPRAISED | IMA_AUDITED | \
+ IMA_COLLECTED | IMA_APPRAISED_SUBMASK)
+
+/* iint subaction appraise cache flags */
+#define IMA_FILE_APPRAISE 0x00000100
+#define IMA_FILE_APPRAISED 0x00000200
+#define IMA_MMAP_APPRAISE 0x00000400
+#define IMA_MMAP_APPRAISED 0x00000800
+#define IMA_BPRM_APPRAISE 0x00001000
+#define IMA_BPRM_APPRAISED 0x00002000
+#define IMA_MODULE_APPRAISE 0x00004000
+#define IMA_MODULE_APPRAISED 0x00008000
+#define IMA_APPRAISE_SUBMASK (IMA_FILE_APPRAISE | IMA_MMAP_APPRAISE | \
+ IMA_BPRM_APPRAISE | IMA_MODULE_APPRAISE)
+#define IMA_APPRAISED_SUBMASK (IMA_FILE_APPRAISED | IMA_MMAP_APPRAISED | \
+ IMA_BPRM_APPRAISED | IMA_MODULE_APPRAISED)
enum evm_ima_xattr_type {
IMA_XATTR_DIGEST = 0x01,
@@ -48,10 +66,13 @@ struct integrity_iint_cache {
struct rb_node rb_node; /* rooted in integrity_iint_tree */
struct inode *inode; /* back pointer to inode in question */
u64 version; /* track inode changes */
- unsigned short flags;
+ unsigned long flags;
struct evm_ima_xattr_data ima_xattr;
- enum integrity_status ima_status;
- enum integrity_status evm_status;
+ enum integrity_status ima_file_status:4;
+ enum integrity_status ima_mmap_status:4;
+ enum integrity_status ima_bprm_status:4;
+ enum integrity_status ima_module_status:4;
+ enum integrity_status evm_status:4;
};
/* rbtree tree calls to lookup, insert, delete
@@ -81,5 +102,16 @@ static inline int integrity_digsig_verify(const unsigned int id,
#endif /* CONFIG_INTEGRITY_SIGNATURE */
+#ifdef CONFIG_INTEGRITY_ASYMMETRIC_KEYS
+int asymmetric_verify(struct key *keyring, const char *sig,
+ int siglen, const char *data, int datalen);
+#else
+static inline int asymmetric_verify(struct key *keyring, const char *sig,
+ int siglen, const char *data, int datalen)
+{
+ return -EOPNOTSUPP;
+}
+#endif
+
/* set during initialization */
extern int iint_initialized;