Vadim Bendebury | 5679752 | 2015-05-20 10:32:25 -0700 | [diff] [blame] | 1 | // This file was extracted from the TCG Published |
| 2 | // Trusted Platform Module Library |
| 3 | // Part 3: Commands |
| 4 | // Family "2.0" |
| 5 | // Level 00 Revision 01.16 |
| 6 | // October 30, 2014 |
| 7 | |
| 8 | #include "InternalRoutines.h" |
| 9 | #include "PolicyOR_fp.h" |
| 10 | #include "Policy_spt_fp.h" |
| 11 | // |
| 12 | // |
| 13 | // Error Returns Meaning |
| 14 | // |
| 15 | // TPM_RC_VALUE no digest in pHashList matched the current value of policyDigest for |
| 16 | // policySession |
| 17 | // |
| 18 | TPM_RC |
| 19 | TPM2_PolicyOR( |
| 20 | PolicyOR_In *in // IN: input parameter list |
| 21 | ) |
| 22 | { |
| 23 | SESSION *session; |
| 24 | UINT32 i; |
| 25 | |
| 26 | // Input Validation and Update |
| 27 | |
| 28 | // Get pointer to the session structure |
| 29 | session = SessionGet(in->policySession); |
| 30 | |
| 31 | // Compare and Update Internal Session policy if match |
| 32 | for(i = 0; i < in->pHashList.count; i++) |
| 33 | { |
| 34 | if( session->attributes.isTrialPolicy == SET |
| 35 | || (Memory2BEqual(&session->u2.policyDigest.b, |
| 36 | &in->pHashList.digests[i].b)) |
| 37 | ) |
| 38 | { |
| 39 | // Found a match |
| 40 | HASH_STATE hashState; |
| 41 | TPM_CC commandCode = TPM_CC_PolicyOR; |
| 42 | |
| 43 | // Start hash |
| 44 | session->u2.policyDigest.t.size = CryptStartHash(session->authHashAlg, |
| 45 | &hashState); |
| 46 | // Set policyDigest to 0 string and add it to hash |
| 47 | MemorySet(session->u2.policyDigest.t.buffer, 0, |
| 48 | session->u2.policyDigest.t.size); |
| 49 | CryptUpdateDigest2B(&hashState, &session->u2.policyDigest.b); |
| 50 | |
| 51 | // add command code |
| 52 | CryptUpdateDigestInt(&hashState, sizeof(TPM_CC), &commandCode); |
| 53 | |
| 54 | // Add each of the hashes in the list |
| 55 | for(i = 0; i < in->pHashList.count; i++) |
| 56 | { |
| 57 | // Extend policyDigest |
| 58 | CryptUpdateDigest2B(&hashState, &in->pHashList.digests[i].b); |
| 59 | } |
| 60 | // Complete digest |
| 61 | CryptCompleteHash2B(&hashState, &session->u2.policyDigest.b); |
| 62 | |
| 63 | return TPM_RC_SUCCESS; |
| 64 | } |
| 65 | } |
| 66 | // None of the values in the list matched the current policyDigest |
| 67 | return TPM_RC_VALUE + RC_PolicyOR_pHashList; |
| 68 | } |