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 "HierarchyChangeAuth_fp.h" |
| 10 | #include "Object_spt_fp.h" |
| 11 | // |
| 12 | // |
| 13 | // Error Returns Meaning |
| 14 | // |
| 15 | // TPM_RC_SIZE newAuth size is greater than that of integrity hash digest |
| 16 | // |
| 17 | TPM_RC |
| 18 | TPM2_HierarchyChangeAuth( |
| 19 | HierarchyChangeAuth_In *in // IN: input parameter list |
| 20 | ) |
| 21 | { |
| 22 | TPM_RC result; |
| 23 | |
| 24 | // The command needs NV update. Check if NV is available. |
| 25 | // A TPM_RC_NV_UNAVAILABLE or TPM_RC_NV_RATE error may be returned at |
| 26 | // this point |
| 27 | result = NvIsAvailable(); |
| 28 | if(result != TPM_RC_SUCCESS) return result; |
| 29 | |
| 30 | // Make sure the the auth value is a reasonable size (not larger than |
| 31 | // the size of the digest produced by the integrity hash. The integrity |
| 32 | // hash is assumed to produce the longest digest of any hash implemented |
| 33 | // on the TPM. |
| 34 | if( MemoryRemoveTrailingZeros(&in->newAuth) |
| 35 | > CryptGetHashDigestSize(CONTEXT_INTEGRITY_HASH_ALG)) |
| 36 | return TPM_RC_SIZE + RC_HierarchyChangeAuth_newAuth; |
| 37 | |
| 38 | // Set hierarchy authValue |
| 39 | switch(in->authHandle) |
| 40 | { |
| 41 | case TPM_RH_OWNER: |
| 42 | gp.ownerAuth = in->newAuth; |
| 43 | NvWriteReserved(NV_OWNER_AUTH, &gp.ownerAuth); |
| 44 | break; |
| 45 | case TPM_RH_ENDORSEMENT: |
| 46 | gp.endorsementAuth = in->newAuth; |
| 47 | NvWriteReserved(NV_ENDORSEMENT_AUTH, &gp.endorsementAuth); |
| 48 | break; |
| 49 | case TPM_RH_PLATFORM: |
| 50 | gc.platformAuth = in->newAuth; |
| 51 | // orderly state should be cleared |
| 52 | g_clearOrderly = TRUE; |
| 53 | break; |
| 54 | case TPM_RH_LOCKOUT: |
| 55 | gp.lockoutAuth = in->newAuth; |
| 56 | NvWriteReserved(NV_LOCKOUT_AUTH, &gp.lockoutAuth); |
| 57 | break; |
| 58 | default: |
| 59 | pAssert(FALSE); |
| 60 | break; |
| 61 | } |
| 62 | |
| 63 | return TPM_RC_SUCCESS; |
| 64 | } |