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 "Attest_spt_fp.h" |
| 10 | #include "NV_spt_fp.h" |
| 11 | #include "NV_Certify_fp.h" |
| 12 | // |
| 13 | // |
| 14 | // Error Returns Meaning |
| 15 | // |
| 16 | // TPM_RC_NV_AUTHORIZATION the authorization was valid but the authorizing entity (authHandle) is |
| 17 | // not allowed to read from the Index referenced by nvIndex |
| 18 | // TPM_RC_KEY signHandle does not reference a signing key |
| 19 | // TPM_RC_NV_LOCKED Index referenced by nvIndex is locked for reading |
| 20 | // TPM_RC_NV_RANGE offset plus size extends outside of the data range of the Index |
| 21 | // referenced by nvIndex |
| 22 | // TPM_RC_NV_UNINITIALIZED Index referenced by nvIndex has not been written |
| 23 | // TPM_RC_SCHEME inScheme is not an allowed value for the key definition |
| 24 | // |
| 25 | TPM_RC |
| 26 | TPM2_NV_Certify( |
| 27 | NV_Certify_In *in, // IN: input parameter list |
| 28 | NV_Certify_Out *out // OUT: output parameter list |
| 29 | ) |
| 30 | { |
| 31 | TPM_RC result; |
| 32 | NV_INDEX nvIndex; |
| 33 | TPMS_ATTEST certifyInfo; |
| 34 | |
| 35 | // Attestation command may cause the orderlyState to be cleared due to |
| 36 | // the reporting of clock info. If this is the case, check if NV is |
| 37 | // available first |
| 38 | if(gp.orderlyState != SHUTDOWN_NONE) |
| 39 | { |
| 40 | // The command needs NV update. Check if NV is available. |
| 41 | // A TPM_RC_NV_UNAVAILABLE or TPM_RC_NV_RATE error may be returned at |
| 42 | // this point |
| 43 | result = NvIsAvailable(); |
| 44 | if(result != TPM_RC_SUCCESS) |
| 45 | return result; |
| 46 | } |
| 47 | |
| 48 | // Input Validation |
| 49 | |
| 50 | // Get NV index info |
| 51 | NvGetIndexInfo(in->nvIndex, &nvIndex); |
| 52 | |
| 53 | // Common access checks. A TPM_RC_NV_AUTHORIZATION or TPM_RC_NV_LOCKED |
| 54 | // error may be returned at this point |
| 55 | result = NvReadAccessChecks(in->authHandle, in->nvIndex); |
| 56 | if(result != TPM_RC_SUCCESS) |
| 57 | return result; |
| 58 | |
| 59 | // See if the range to be certified is out of the bounds of the defined |
| 60 | // Index |
| 61 | if((in->size + in->offset) > nvIndex.publicArea.dataSize) |
| 62 | return TPM_RC_NV_RANGE; |
| 63 | |
| 64 | // Command Output |
| 65 | |
| 66 | // Filling in attest information |
| 67 | // Common fields |
| 68 | // FillInAttestInfo can return TPM_RC_SCHEME or TPM_RC_KEY |
| 69 | result = FillInAttestInfo(in->signHandle, |
| 70 | &in->inScheme, |
| 71 | &in->qualifyingData, |
| 72 | &certifyInfo); |
| 73 | if(result != TPM_RC_SUCCESS) |
| 74 | { |
| 75 | if(result == TPM_RC_KEY) |
| 76 | return TPM_RC_KEY + RC_NV_Certify_signHandle; |
| 77 | else |
| 78 | return RcSafeAddToResult(result, RC_NV_Certify_inScheme); |
| 79 | } |
| 80 | // NV certify specific fields |
| 81 | // Attestation type |
| 82 | certifyInfo.type = TPM_ST_ATTEST_NV; |
| 83 | |
| 84 | // Get the name of the index |
| 85 | certifyInfo.attested.nv.indexName.t.size = |
Vadim Bendebury | d302849 | 2015-05-31 18:15:44 -0700 | [diff] [blame] | 86 | NvGetName(in->nvIndex, &certifyInfo.attested.nv.indexName.t.buffer); |
Vadim Bendebury | 5679752 | 2015-05-20 10:32:25 -0700 | [diff] [blame] | 87 | |
| 88 | // Set the return size |
| 89 | certifyInfo.attested.nv.nvContents.t.size = in->size; |
| 90 | |
| 91 | // Set the offset |
| 92 | certifyInfo.attested.nv.offset = in->offset; |
| 93 | |
| 94 | // Perform the read |
| 95 | NvGetIndexData(in->nvIndex, &nvIndex, |
| 96 | in->offset, in->size, |
| 97 | certifyInfo.attested.nv.nvContents.t.buffer); |
| 98 | |
| 99 | // Sign attestation structure. A NULL signature will be returned if |
| 100 | // signHandle is TPM_RH_NULL. SignAttestInfo() may return TPM_RC_VALUE, |
| 101 | // TPM_RC_SCHEME or TPM_RC_ATTRUBUTES. |
| 102 | // Note: SignAttestInfo may return TPM_RC_ATTRIBUTES if the key is not a |
| 103 | // signing key but that was checked above. TPM_RC_VALUE would mean that the |
| 104 | // data to sign is too large but the data to sign is a digest |
| 105 | result = SignAttestInfo(in->signHandle, |
| 106 | &in->inScheme, |
| 107 | &certifyInfo, |
| 108 | &in->qualifyingData, |
| 109 | &out->certifyInfo, |
| 110 | &out->signature); |
| 111 | if(result != TPM_RC_SUCCESS) |
| 112 | return result; |
| 113 | |
| 114 | // orderly state should be cleared because of the reporting of clock info |
| 115 | // if signing happens |
| 116 | if(in->signHandle != TPM_RH_NULL) |
| 117 | g_clearOrderly = TRUE; |
| 118 | |
| 119 | return TPM_RC_SUCCESS; |
| 120 | } |