1 2/* 3 * Licensed Materials - Property of IBM 4 * 5 * trousers - An open source TCG Software Stack 6 * 7 * (C) Copyright International Business Machines Corp. 2007 8 * 9 */ 10 11 12#include <stdlib.h> 13#include <string.h> 14 15#include "trousers/tss.h" 16#include "trousers/trousers.h" 17#include "trousers_types.h" 18#include "spi_utils.h" 19#include "capabilities.h" 20#include "tsplog.h" 21#include "obj.h" 22 23 24#ifdef TSS_BUILD_TRANSPORT 25TSS_RESULT 26Transport_Sign(TSS_HCONTEXT tspContext, /* in */ 27 TCS_KEY_HANDLE keyHandle, /* in */ 28 UINT32 areaToSignSize, /* in */ 29 BYTE * areaToSign, /* in */ 30 TPM_AUTH * privAuth, /* in, out */ 31 UINT32 * sigSize, /* out */ 32 BYTE ** sig) /* out */ 33{ 34 UINT64 offset; 35 TSS_RESULT result; 36 UINT32 handlesLen, decLen, dataLen; 37 TCS_HANDLE *handles, handle; 38 TPM_DIGEST pubKeyHash; 39 Trspi_HashCtx hashCtx; 40 BYTE *dec, *data; 41 42 43 if ((result = obj_context_transport_init(tspContext))) 44 return result; 45 46 LogDebugFn("Executing in a transport session"); 47 48 if ((result = obj_tcskey_get_pubkeyhash(keyHandle, pubKeyHash.digest))) 49 return result; 50 51 result = Trspi_HashInit(&hashCtx, TSS_HASH_SHA1); 52 result |= Trspi_Hash_DIGEST(&hashCtx, pubKeyHash.digest); 53 if ((result |= Trspi_HashFinal(&hashCtx, pubKeyHash.digest))) 54 return result; 55 56 handlesLen = 1; 57 handle = keyHandle; 58 handles = &handle; 59 60 dataLen = sizeof(UINT32) + areaToSignSize; 61 if ((data = malloc(dataLen)) == NULL) { 62 LogError("malloc of %u bytes failed", dataLen); 63 return TSPERR(TSS_E_OUTOFMEMORY); 64 } 65 66 offset = 0; 67 Trspi_LoadBlob_UINT32(&offset, areaToSignSize, data); 68 Trspi_LoadBlob(&offset, areaToSignSize, data, areaToSign); 69 70 if ((result = obj_context_transport_execute(tspContext, TPM_ORD_Sign, dataLen, data, 71 &pubKeyHash, &handlesLen, &handles, 72 privAuth, NULL, &decLen, &dec))) { 73 free(data); 74 return result; 75 } 76 free(data); 77 78 offset = 0; 79 Trspi_UnloadBlob_UINT32(&offset, sigSize, dec); 80 81 if ((*sig = malloc(*sigSize)) == NULL) { 82 free(dec); 83 LogError("malloc of %u bytes failed", *sigSize); 84 *sigSize = 0; 85 return TSPERR(TSS_E_OUTOFMEMORY); 86 } 87 Trspi_UnloadBlob(&offset, *sigSize, dec, *sig); 88 89 return result; 90} 91#endif 92 93