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 "SequenceComplete_fp.h" |
| 10 | #include <Platform.h> |
| 11 | // |
| 12 | // |
| 13 | // Error Returns Meaning |
| 14 | // |
| 15 | // TPM_RC_TYPE sequenceHandle does not reference a hash or HMAC sequence |
| 16 | // object |
| 17 | // |
| 18 | TPM_RC |
| 19 | TPM2_SequenceComplete( |
| 20 | SequenceComplete_In *in, // IN: input parameter list |
| 21 | SequenceComplete_Out *out // OUT: output parameter list |
| 22 | ) |
| 23 | { |
| 24 | OBJECT *object; |
| 25 | |
| 26 | // Input validation |
| 27 | |
| 28 | // Get hash object pointer |
| 29 | object = ObjectGet(in->sequenceHandle); |
| 30 | |
| 31 | // input handle must be a hash or HMAC sequence object. |
| 32 | if( object->attributes.hashSeq == CLEAR |
| 33 | && object->attributes.hmacSeq == CLEAR) |
| 34 | return TPM_RC_MODE + RC_SequenceComplete_sequenceHandle; |
| 35 | |
| 36 | // Command Output |
| 37 | |
| 38 | if(object->attributes.hashSeq == SET) // sequence object for hash |
| 39 | { |
| 40 | // Update last piece of data |
| 41 | HASH_OBJECT *hashObject = (HASH_OBJECT *)object; |
| 42 | |
| 43 | // Get the hash algorithm before the algorithm is lost in CryptCompleteHash |
| 44 | TPM_ALG_ID hashAlg = hashObject->state.hashState[0].state.hashAlg; |
| 45 | |
| 46 | CryptUpdateDigest2B(&hashObject->state.hashState[0], &in->buffer.b); |
| 47 | |
| 48 | // Complete hash |
| 49 | out->result.t.size |
| 50 | = CryptGetHashDigestSize( |
| 51 | CryptGetContextAlg(&hashObject->state.hashState[0])); |
| 52 | |
| 53 | CryptCompleteHash2B(&hashObject->state.hashState[0], &out->result.b); |
| 54 | |
| 55 | // Check if the first block of the sequence has been received |
| 56 | if(hashObject->attributes.firstBlock == CLEAR) |
| 57 | { |
| 58 | // If not, then this is the first block so see if it is 'safe' |
| 59 | // to sign. |
| 60 | if(TicketIsSafe(&in->buffer.b)) |
| 61 | hashObject->attributes.ticketSafe = SET; |
| 62 | } |
| 63 | |
| 64 | // Output ticket |
| 65 | out->validation.tag = TPM_ST_HASHCHECK; |
| 66 | out->validation.hierarchy = in->hierarchy; |
| 67 | |
| 68 | if(in->hierarchy == TPM_RH_NULL) |
| 69 | { |
| 70 | // Ticket is not required |
| 71 | out->validation.digest.t.size = 0; |
| 72 | } |
| 73 | else if(object->attributes.ticketSafe == CLEAR) |
| 74 | { |
| 75 | // Ticket is not safe to generate |
| 76 | out->validation.hierarchy = TPM_RH_NULL; |
| 77 | out->validation.digest.t.size = 0; |
| 78 | } |
| 79 | else |
| 80 | { |
| 81 | // Compute ticket |
| 82 | TicketComputeHashCheck(out->validation.hierarchy, hashAlg, |
| 83 | &out->result, &out->validation); |
| 84 | } |
| 85 | } |
| 86 | else |
| 87 | { |
| 88 | HASH_OBJECT *hashObject = (HASH_OBJECT *)object; |
| 89 | |
| 90 | // Update last piece of data |
| 91 | CryptUpdateDigest2B(&hashObject->state.hmacState, &in->buffer.b); |
| 92 | // Complete hash/HMAC |
| 93 | out->result.t.size = |
| 94 | CryptGetHashDigestSize( |
| 95 | CryptGetContextAlg(&hashObject->state.hmacState.hashState)); |
| 96 | CryptCompleteHMAC2B(&(hashObject->state.hmacState), &out->result.b); |
| 97 | |
| 98 | // No ticket is generated for HMAC sequence |
| 99 | out->validation.tag = TPM_ST_HASHCHECK; |
| 100 | out->validation.hierarchy = TPM_RH_NULL; |
| 101 | out->validation.digest.t.size = 0; |
| 102 | } |
| 103 | |
| 104 | // Internal Data Update |
| 105 | |
| 106 | // mark sequence object as evict so it will be flushed on the way out |
| 107 | object->attributes.evict = SET; |
| 108 | |
| 109 | return TPM_RC_SUCCESS; |
| 110 | } |