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Commit c749ba91 authored by Mimi Zohar's avatar Mimi Zohar Committed by James Morris
Browse files

key: add tpm_send command 



Add internal kernel tpm_send() command used to seal/unseal keys.

Changelog:
- replaced module_put in tpm_send() with new tpm_chip_put() wrapper
  (suggested by David Howells)
- Make tpm_send() cmd argument a 'void *' (suggested by David Howells)

Signed-off-by: default avatarDavid Safford <safford@watson.ibm.com>
Signed-off-by: default avatarMimi Zohar <zohar@us.ibm.com>
Acked-by: default avatarDavid Howells <dhowells@redhat.com>
Acked-by: default avatarSerge E. Hallyn <serge.hallyn@canonical.com>
Signed-off-by: default avatarJames Morris <jmorris@namei.org>
parent a0e39349

drivers/char/tpm/tpm.c

+16 −0
Original line number Diff line number Diff line
@@ -780,6 +780,22 @@ 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, void *cmd, size_t buflen)

{

	struct tpm_chip *chip;

	int rc;



	chip = tpm_chip_find_get(chip_num);

	if (chip == NULL)

		return -ENODEV;



	rc = transmit_cmd(chip, cmd, buflen, "attempting tpm_cmd");



	tpm_chip_put(chip);

	return rc;

}

EXPORT_SYMBOL_GPL(tpm_send);



ssize_t tpm_show_pcrs(struct device *dev, struct device_attribute *attr,

		      char *buf)

{

include/linux/tpm.h

+4 −0
Original line number Diff line number Diff line
@@ -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, void *cmd, size_t buflen);

#else

static inline int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf) {

	return -ENODEV;
@@ -38,5 +39,8 @@ 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, void *cmd, size_t buflen) {

	return -ENODEV;

}

#endif

#endif