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 "ObjectChangeAuth_fp.h" |
| 10 | #include "Object_spt_fp.h" |
| 11 | // |
| 12 | // |
| 13 | // Error Returns Meaning |
| 14 | // |
| 15 | // TPM_RC_SIZE newAuth is larger than the size of the digest of the Name algorithm of |
| 16 | // objectHandle |
| 17 | // TPM_RC_TYPE the key referenced by parentHandle is not the parent of the object |
| 18 | // referenced by objectHandle; or objectHandle is a sequence object. |
| 19 | // |
| 20 | TPM_RC |
| 21 | TPM2_ObjectChangeAuth( |
| 22 | ObjectChangeAuth_In *in, // IN: input parameter list |
| 23 | ObjectChangeAuth_Out *out // OUT: output parameter list |
| 24 | ) |
| 25 | { |
| 26 | TPMT_SENSITIVE sensitive; |
| 27 | |
| 28 | OBJECT *object; |
| 29 | TPM2B_NAME objectQN, QNCompare; |
| 30 | TPM2B_NAME parentQN; |
| 31 | |
| 32 | // Input Validation |
| 33 | |
| 34 | // Get object pointer |
| 35 | object = ObjectGet(in->objectHandle); |
| 36 | |
| 37 | // Can not change auth on sequence object |
| 38 | if(ObjectIsSequence(object)) |
| 39 | return TPM_RC_TYPE + RC_ObjectChangeAuth_objectHandle; |
| 40 | |
| 41 | // Make sure that the auth value is consistent with the nameAlg |
| 42 | if( MemoryRemoveTrailingZeros(&in->newAuth) |
| 43 | > CryptGetHashDigestSize(object->publicArea.nameAlg)) |
| 44 | return TPM_RC_SIZE + RC_ObjectChangeAuth_newAuth; |
| 45 | |
| 46 | // Check parent for object |
| 47 | // parent handle must be the parent of object handle. In this |
| 48 | // implementation we verify this by checking the QN of object. Other |
| 49 | // implementation may choose different method to verify this attribute. |
| 50 | ObjectGetQualifiedName(in->parentHandle, &parentQN); |
| 51 | ObjectComputeQualifiedName(&parentQN, object->publicArea.nameAlg, |
| 52 | &object->name, &QNCompare); |
| 53 | |
| 54 | ObjectGetQualifiedName(in->objectHandle, &objectQN); |
| 55 | if(!Memory2BEqual(&objectQN.b, &QNCompare.b)) |
| 56 | return TPM_RC_TYPE + RC_ObjectChangeAuth_parentHandle; |
| 57 | |
| 58 | // Command Output |
| 59 | |
| 60 | // Copy internal sensitive area |
| 61 | sensitive = object->sensitive; |
| 62 | // Copy authValue |
| 63 | sensitive.authValue = in->newAuth; |
| 64 | |
| 65 | // Prepare output private data from sensitive |
| 66 | SensitiveToPrivate(&sensitive, &object->name, in->parentHandle, |
| 67 | object->publicArea.nameAlg, |
| 68 | &out->outPrivate); |
| 69 | |
| 70 | return TPM_RC_SUCCESS; |
| 71 | } |