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 "PolicyCommandCode_fp.h" |
| 10 | // |
| 11 | // |
| 12 | // Error Returns Meaning |
| 13 | // |
| 14 | // TPM_RC_VALUE commandCode of policySession previously set to a different value |
| 15 | // |
| 16 | TPM_RC |
| 17 | TPM2_PolicyCommandCode( |
| 18 | PolicyCommandCode_In *in // IN: input parameter list |
| 19 | ) |
| 20 | { |
| 21 | SESSION *session; |
| 22 | TPM_CC commandCode = TPM_CC_PolicyCommandCode; |
| 23 | HASH_STATE hashState; |
| 24 | |
| 25 | // Input validation |
| 26 | |
| 27 | // Get pointer to the session structure |
| 28 | session = SessionGet(in->policySession); |
| 29 | |
| 30 | if(session->commandCode != 0 && session->commandCode != in->code) |
| 31 | return TPM_RC_VALUE + RC_PolicyCommandCode_code; |
| 32 | if(!CommandIsImplemented(in->code)) |
| 33 | return TPM_RC_POLICY_CC + RC_PolicyCommandCode_code; |
| 34 | |
| 35 | // Internal Data Update |
| 36 | // Update policy hash |
| 37 | // policyDigestnew = hash(policyDigestold || TPM_CC_PolicyCommandCode || code) |
| 38 | // Start hash |
| 39 | CryptStartHash(session->authHashAlg, &hashState); |
| 40 | |
| 41 | // add old digest |
| 42 | CryptUpdateDigest2B(&hashState, &session->u2.policyDigest.b); |
| 43 | |
| 44 | // add commandCode |
| 45 | CryptUpdateDigestInt(&hashState, sizeof(TPM_CC), &commandCode); |
| 46 | |
| 47 | // add input commandCode |
| 48 | CryptUpdateDigestInt(&hashState, sizeof(TPM_CC), &in->code); |
| 49 | |
| 50 | // complete the hash and get the results |
| 51 | CryptCompleteHash2B(&hashState, &session->u2.policyDigest.b); |
| 52 | |
| 53 | // update commandCode value in session context |
| 54 | session->commandCode = in->code; |
| 55 | |
| 56 | return TPM_RC_SUCCESS; |
| 57 | } |