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 "PCR_Extend_fp.h" 10 // 11 // 12 // Error Returns Meaning 13 // 14 // TPM_RC_LOCALITY current command locality is not allowed to extend the PCR 15 // referenced by pcrHandle 16 // 17 TPM_RC 18 TPM2_PCR_Extend( 19 PCR_Extend_In *in // IN: input parameter list 20 ) 21 { 22 TPM_RC result; 23 UINT32 i; 24 25 // Input Validation 26 27 // NOTE: This function assumes that the unmarshaling function for 'digests' will 28 // have validated that all of the indicated hash algorithms are valid. If the 29 // hash algorithms are correct, the unmarshaling code will unmarshal a digest 30 // of the size indicated by the hash algorithm. If the overall size is not 31 // consistent, the unmarshaling code will run out of input data or have input 32 // data left over. In either case, it will cause an unmarshaling error and this 33 // function will not be called. 34 35 // For NULL handle, do nothing and return success 36 if(in->pcrHandle == TPM_RH_NULL) 37 return TPM_RC_SUCCESS; 38 39 // Check if the extend operation is allowed by the current command locality 40 if(!PCRIsExtendAllowed(in->pcrHandle)) 41 return TPM_RC_LOCALITY; 42 43 // If PCR is state saved and we need to update orderlyState, check NV 44 // availability 45 if(PCRIsStateSaved(in->pcrHandle) && gp.orderlyState != SHUTDOWN_NONE) 46 { 47 result = NvIsAvailable(); 48 if(result != TPM_RC_SUCCESS) return result; 49 g_clearOrderly = TRUE; 50 } 51 52 // Internal Data Update 53 54 // Iterate input digest list to extend 55 for(i = 0; i < in->digests.count; i++) 56 { 57 PCRExtend(in->pcrHandle, in->digests.digests[i].hashAlg, 58 CryptGetHashDigestSize(in->digests.digests[i].hashAlg), 59 (BYTE *) &in->digests.digests[i].digest); 60 } 61 62 return TPM_RC_SUCCESS; 63 } 64
