From: Mimi Zohar Subject: [RFC][PATCH 2/4] key: add tpm_send command Date: Tue, 28 Sep 2010 14:36:31 -0400 Message-ID: <1285698993-16927-3-git-send-email-zohar@linux.vnet.ibm.com> References: <1285698993-16927-1-git-send-email-zohar@linux.vnet.ibm.com> Cc: Mimi Zohar , keyrings@linux-nfs.org, linux-crypto@vger.kernel.org, David Howells , David Safford , Rajiv Andrade To: linux-security-module@vger.kernel.org Return-path: In-Reply-To: <1285698993-16927-1-git-send-email-zohar@linux.vnet.ibm.com> Sender: linux-security-module-owner@vger.kernel.org List-Id: linux-crypto.vger.kernel.org Add internal kernel tpm_send() command used to seal/unseal keys. Signed-off-by: David Safford Reviewd-by: Mimi Zohar --- drivers/char/tpm/tpm.c | 17 +++++++++++++++++ include/linux/tpm.h | 3 +++ 2 files changed, 20 insertions(+), 0 deletions(-) diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c index 05ad4a1..37c16a8 100644 --- a/drivers/char/tpm/tpm.c +++ b/drivers/char/tpm/tpm.c @@ -770,6 +770,23 @@ int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash) } EXPORT_SYMBOL_GPL(tpm_pcr_extend); +int tpm_send(u32 chip_num, char *cmd, int buflen) +{ + struct tpm_chip *chip; + int rc; + + chip = tpm_chip_find_get(chip_num); + if (chip == NULL) + return -ENODEV; + + rc = transmit_cmd(chip, (struct tpm_cmd_t *)cmd, buflen, + "attempting tpm_cmd"); + + module_put(chip->dev->driver->owner); + return rc; +} +EXPORT_SYMBOL_GPL(tpm_send); + ssize_t tpm_show_pcrs(struct device *dev, struct device_attribute *attr, char *buf) { diff --git a/include/linux/tpm.h b/include/linux/tpm.h index ac5d1c1..a0ecaa9 100644 --- a/include/linux/tpm.h +++ b/include/linux/tpm.h @@ -31,6 +31,7 @@ extern int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf); extern int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash); +extern int tpm_send(u32 chip_num, char *cmd, int buflen); #else static inline int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf) { return -ENODEV; @@ -38,5 +39,7 @@ static inline int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf) { static inline int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash) { return -ENODEV; } +static inline int tpm_send(u32 chip_num, char *cmd, int buflen) { + return -ENODEV; #endif #endif -- 1.7.2.2