[SeaBIOS] [PATCH v3 02/11] tpm: Factor out tpm_extend
Stefan Berger
stefanb at us.ibm.com
Tue Feb 2 19:09:10 CET 2016
From: Stefan Berger <stefanb at linux.vnet.ibm.com>
In preparation for TPM 2 code support, factor out the TPM 1.2 specific
code from tpm_log_extend_event and put it into tpm_extend().
Signed-off-by: Stefan Berger <stefanb at linux.vnet.ibm.com>
---
src/tcgbios.c | 18 ++++++++++++++----
1 file changed, 14 insertions(+), 4 deletions(-)
diff --git a/src/tcgbios.c b/src/tcgbios.c
index 0559083..799a8bf 100644
--- a/src/tcgbios.c
+++ b/src/tcgbios.c
@@ -287,18 +287,18 @@ determine_timeouts(void)
}
static int
-tpm_log_extend_event(struct pcpes *pcpes, const void *event)
+tpm_extend(u32 pcrindex, const u8 *digest)
{
- if (pcpes->pcrindex >= 24)
+ if (pcrindex >= 24)
return -1;
struct tpm_req_extend tre = {
.hdr.tag = cpu_to_be16(TPM_TAG_RQU_CMD),
.hdr.totlen = cpu_to_be32(sizeof(tre)),
.hdr.ordinal = cpu_to_be32(TPM_ORD_Extend),
- .pcrindex = cpu_to_be32(pcpes->pcrindex),
+ .pcrindex = cpu_to_be32(pcrindex),
};
- memcpy(tre.digest, pcpes->digest, sizeof(tre.digest));
+ memcpy(tre.digest, digest, sizeof(tre.digest));
struct tpm_rsp_extend rsp;
u32 resp_length = sizeof(rsp);
@@ -307,6 +307,16 @@ tpm_log_extend_event(struct pcpes *pcpes, const void *event)
if (ret || resp_length != sizeof(rsp) || rsp.hdr.errcode)
return -1;
+ return 0;
+}
+
+static int
+tpm_log_extend_event(struct pcpes *pcpes, const void *event)
+{
+ int ret = tpm_extend(pcpes->pcrindex, pcpes->digest);
+ if (ret)
+ return -1;
+
return tpm_log_event(pcpes, event);
}
--
2.4.3
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