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Changed definition of pcr_value in pcr_entry_t structure 

Implemented function to check if recevied PCR after value matches with any configured pcr value
This commit is contained in:
Sansar Choinyambuu 2011-10-19 13:54:29 +02:00 committed by Andreas Steffen
parent 54c0e80f92
commit db15e3a0d9
2 changed files with 47 additions and 0 deletions
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40
src/libpts/pts/pts.c
View File

@ -984,6 +984,45 @@ static u_int32_t get_max_pcr_index(private_pts_t *this)
return ret;
}
METHOD(pts_t, does_pcr_value_match, bool,
private_pts_t *this, chunk_t pcr_after_value)
{
linked_list_t *entries;
enumerator_t *e;
pcr_entry_t *pcr_entry;
bool match_found = FALSE;
if (!load_pcr_entries(&entries))
{
DBG1(DBG_PTS, "failed to load PCR entries");
return FALSE;
}
e = entries->create_enumerator(entries);
while (e->enumerate(e, &pcr_entry))
{
if (chunk_equals(chunk_create(pcr_entry->pcr_value, PCR_LEN), pcr_after_value))
{
DBG1(DBG_PTS, "PCR %d value matched with configured value",
pcr_entry->pcr_number);
match_found = TRUE;
break;
}
}
DESTROY_IF(e);
DESTROY_IF(entries);
free(pcr_entry);
if (match_found)
{
return TRUE;
}
DBG1(DBG_PTS, "PCR after value didn't match with any of the configured values");
return FALSE;
}
/**
* 1. build a TCPA_PCR_COMPOSITE structure which contains (pcrCompositeBuf)
* TCPA_PCR_SELECTION structure (bitmask length + bitmask)
@ -1045,6 +1084,7 @@ METHOD(pts_t, get_quote_info, bool,
u_int32_t index = pcr_entry->pcr_number;
mask_bytes[index / 8] |= (1 << (index % 8));
}
e->destroy(e);
for (i = 0; i< bitmask_len ; i++)

7
src/libpts/pts/pts.h
View File

@ -388,6 +388,13 @@ struct pts_t {
bool (*quote_tpm)(pts_t *this, u_int32_t *pcrs, u_int32_t num_of_pcrs,
chunk_t *pcr_composite, chunk_t *quote_signature);
/**
* Check PCR after value in Simple Component Evidence matches configured value
*
* @return FALSE in case of any error or non-match, TRUE otherwise
*/
bool (*does_pcr_value_match)(pts_t *this, chunk_t pcr_after_value);
/**
* Constructs and returns PCR Quote Digest structure expected from IMC
*