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tpm: add TPM2_GetRandom command support

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Add support for TPM2 GetRandom command

Signed-off-by: Dhananjay Phadke <dphadke@linux.microsoft.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Dhananjay Phadke
2020-06-04 16:43:59 -07:00
committed by Tom Rini
parent 78cc3fcf08
commit 06bea49809
2 changed files with 57 additions and 0 deletions
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13
include/tpm-v2.h
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@@ -70,6 +70,7 @@ enum tpm2_handles {
* @TPM2_CC_DAM_RESET: TPM2_DictionaryAttackLockReset().
* @TPM2_CC_DAM_PARAMETERS: TPM2_DictionaryAttackParameters().
* @TPM2_CC_GET_CAPABILITY: TPM2_GetCapibility().
* @TPM2_CC_GET_RANDOM: TPM2_GetRandom().
* @TPM2_CC_PCR_READ: TPM2_PCR_Read().
* @TPM2_CC_PCR_EXTEND: TPM2_PCR_Extend().
* @TPM2_CC_PCR_SETAUTHVAL: TPM2_PCR_SetAuthValue().
@@ -85,6 +86,7 @@ enum tpm2_command_codes {
TPM2_CC_DAM_PARAMETERS = 0x013A,
TPM2_CC_NV_READ = 0x014E,
TPM2_CC_GET_CAPABILITY = 0x017A,
TPM2_CC_GET_RANDOM = 0x017B,
TPM2_CC_PCR_READ = 0x017E,
TPM2_CC_PCR_EXTEND = 0x0182,
TPM2_CC_PCR_SETAUTHVAL = 0x0183,
@@ -339,4 +341,15 @@ u32 tpm2_pcr_setauthvalue(struct udevice *dev, const char *pw,
const ssize_t pw_sz, u32 index, const char *key,
const ssize_t key_sz);
/**
* Issue a TPM2_GetRandom command.
*
* @dev TPM device
* @param data output buffer for the random bytes
* @param count size of output buffer
*
* @return return code of the operation
*/
u32 tpm2_get_random(struct udevice *dev, void *data, u32 count);
#endif /* __TPM_V2_H */