| 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 "GetSessionAuditDigest_fp.h" |
| 11 | // |
| 12 | // |
| 13 | // Error Returns Meaning |
| 14 | // |
| 15 | // TPM_RC_KEY key referenced by signHandle is not a signing key |
| 16 | // TPM_RC_SCHEME inScheme is incompatible with signHandle type; or both scheme and |
| 17 | // key's default scheme are empty; or scheme is empty while key's |
| 18 | // default scheme requires explicit input scheme (split signing); or non- |
| 19 | // empty default key scheme differs from scheme |
| 20 | // TPM_RC_TYPE sessionHandle does not reference an audit session |
| 21 | // TPM_RC_VALUE digest generated for the given scheme is greater than the modulus of |
| 22 | // signHandle (for an RSA key); invalid commit status or failed to |
| 23 | // generate r value (for an ECC key) |
| 24 | // |
| 25 | TPM_RC |
| 26 | TPM2_GetSessionAuditDigest( |
| 27 | GetSessionAuditDigest_In *in, // IN: input parameter list |
| 28 | GetSessionAuditDigest_Out *out // OUT: output parameter list |
| 29 | ) |
| 30 | { |
| 31 | TPM_RC result; |
| 32 | SESSION *session; |
| 33 | TPMS_ATTEST auditInfo; |
| 34 | |
| 35 | // Input Validation |
| 36 | |
| 37 | // SessionAuditDigest specific input validation |
| 38 | // Get session pointer |
| 39 | session = SessionGet(in->sessionHandle); |
| 40 | |
| 41 | // session must be an audit session |
| 42 | if(session->attributes.isAudit == CLEAR) |
| 43 | return TPM_RC_TYPE + RC_GetSessionAuditDigest_sessionHandle; |
| 44 | |
| 45 | // Command Output |
| 46 | |
| 47 | // Filling in attest information |
| 48 | // Common fields |
| 49 | result = FillInAttestInfo(in->signHandle, |
| 50 | &in->inScheme, |
| 51 | &in->qualifyingData, |
| 52 | &auditInfo); |
| 53 | if(result != TPM_RC_SUCCESS) |
| 54 | { |
| 55 | if(result == TPM_RC_KEY) |
| 56 | return TPM_RC_KEY + RC_GetSessionAuditDigest_signHandle; |
| 57 | else |
| 58 | return RcSafeAddToResult(result, RC_GetSessionAuditDigest_inScheme); |
| 59 | } |
| 60 | |
| 61 | // SessionAuditDigest specific fields |
| 62 | // Attestation type |
| 63 | auditInfo.type = TPM_ST_ATTEST_SESSION_AUDIT; |
| 64 | |
| 65 | // Copy digest |
| 66 | auditInfo.attested.sessionAudit.sessionDigest = session->u2.auditDigest; |
| 67 | |
| 68 | // Exclusive audit session |
| 69 | if(g_exclusiveAuditSession == in->sessionHandle) |
| 70 | auditInfo.attested.sessionAudit.exclusiveSession = TRUE; |
| 71 | else |
| 72 | auditInfo.attested.sessionAudit.exclusiveSession = FALSE; |
| 73 | |
| 74 | // Sign attestation structure. A NULL signature will be returned if |
| 75 | // signHandle is TPM_RH_NULL. A TPM_RC_NV_UNAVAILABLE, TPM_RC_NV_RATE, |
| 76 | // TPM_RC_VALUE, TPM_RC_SCHEME or TPM_RC_ATTRIBUTES error may be returned at |
| 77 | // this point |
| 78 | result = SignAttestInfo(in->signHandle, |
| 79 | &in->inScheme, |
| 80 | &auditInfo, |
| 81 | &in->qualifyingData, |
| 82 | &out->auditInfo, |
| 83 | &out->signature); |
| 84 | if(result != TPM_RC_SUCCESS) |
| 85 | return result; |
| 86 | |
| 87 | // orderly state should be cleared because of the reporting of clock info |
| 88 | // if signing happens |
| 89 | if(in->signHandle != TPM_RH_NULL) |
| 90 | g_clearOrderly = TRUE; |
| 91 | |
| 92 | return TPM_RC_SUCCESS; |
| 93 | } |