diff options
Diffstat (limited to 'src/lib/tpm2_tlcl.c')
| -rw-r--r-- | src/lib/tpm2_tlcl.c | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/src/lib/tpm2_tlcl.c b/src/lib/tpm2_tlcl.c index 3003400033..d9f9d37533 100644 --- a/src/lib/tpm2_tlcl.c +++ b/src/lib/tpm2_tlcl.c @@ -65,10 +65,29 @@ uint32_t tlcl_assert_physical_presence(void) return TPM_SUCCESS; } +/* + * The caller will provide the digest in a 32 byte buffer, let's consider it a + * sha256 digest. + */ uint32_t tlcl_extend(int pcr_num, const uint8_t *in_digest, uint8_t *out_digest) { - printk(BIOS_INFO, "%s:%s:%d\n", __FILE__, __func__, __LINE__); + struct tpm2_pcr_extend_cmd pcr_ext_cmd; + struct tpm2_response *response; + + pcr_ext_cmd.pcrHandle = HR_PCR + pcr_num; + pcr_ext_cmd.digests.count = 1; + pcr_ext_cmd.digests.digests[0].hashAlg = TPM_ALG_SHA256; + memcpy(pcr_ext_cmd.digests.digests[0].digest.sha256, in_digest, + sizeof(pcr_ext_cmd.digests.digests[0].digest.sha256)); + + response = tpm_process_command(TPM2_PCR_Extend, &pcr_ext_cmd); + + printk(BIOS_INFO, "%s: response is %x\n", + __func__, response ? response->hdr.tpm_code : -1); + if (!response || response->hdr.tpm_code) + return TPM_E_IOERROR; + return TPM_SUCCESS; } |