denozord/strongswan-ext
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Implemented matching of Optional PCR Composite field value when Hashing was done to reduce the size of it

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Optional Composite Hash Algorithm field is always present, has value of all zeroes if was not used
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Sansar Choinyambuu authored and Andreas Steffen committed 2011-11-28 14:39:53 +01:00
1 parent 645f55eb20
commit cb66320fee
5 files changed
+61 -29
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src/libpts/tcg/tcg_pts_attr_simple_evid_final.c
+15 -11
View File
@@ -167,11 +167,13 @@ METHOD(pa_tnc_attr_t, build, void,
writer->write_uint8 (writer, flags);
writer->write_uint8 (writer, PTS_SIMPLE_EVID_FINAL_RESERVED);
/** Optional Composite Hash Algorithm field is always present
* Field has value of all zeroes if not used.
* Implemented adhering the suggestion of Paul Sangster 28.Oct.2011
*/
writer->write_uint16(writer, this->comp_hash_algorithm);
/* Optional fields */
if (this->comp_hash_algorithm)
{
writer->write_uint16(writer, this->comp_hash_algorithm);
}
if (this->pcr_comp.ptr && this->pcr_comp.len > 0)
{
writer->write_uint32 (writer, this->pcr_comp.len);
@@ -197,7 +199,7 @@ METHOD(pa_tnc_attr_t, process, status_t,
bio_reader_t *reader;
u_int8_t flags;
u_int8_t reserved;
/** u_int16_t algorithm;*/
u_int16_t algorithm;
if (this->value.len < PTS_SIMPLE_EVID_FINAL_SIZE)
{
@@ -232,18 +234,20 @@ METHOD(pa_tnc_attr_t, process, status_t,
}
reader->read_uint8(reader, &reserved);
/** Optional Composite Hash Algorithm field is always present
* Field has value of all zeroes if not used.
* Implemented adhering the suggestion of Paul Sangster 28.Oct.2011
*/
reader->read_uint16(reader, &algorithm);
this->comp_hash_algorithm = algorithm;
/* Optional Composite Hash Algorithm and TPM PCR Composite field is included */
if (this->flags != PTS_SIMPLE_EVID_FINAL_FLAG_NO)
{
u_int32_t pcr_comp_len, tpm_quote_sign_len;
/** TODO: Ignoring Hashing algorithm field
* There is no flag defined which indicates the precense of it
* reader->read_uint16(reader, &algorithm);
* this->comp_hash_algorithm = algorithm;
*/
reader->read_uint32(reader, &pcr_comp_len);
reader->read_data(reader, pcr_comp_len, &this->pcr_comp);
this->pcr_comp = chunk_clone(this->pcr_comp);