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. 2004, 2007 8 * 9 */ 10 11 12#include <stdlib.h> 13#include <syslog.h> 14#include <unistd.h> 15 16#include "trousers/tss.h" 17#include "trousers/trousers.h" 18#include "trousers_types.h" 19#include "spi_utils.h" 20#include "tsplog.h" 21#include "obj.h" 22 23 24#ifdef TSS_BUILD_TRANSPORT 25TSS_RESULT 26Transport_GetRandom(TSS_HCONTEXT tspContext, /* in */ 27 UINT32 bytesRequested, /* in */ 28 BYTE ** randomBytes) /* out */ 29{ 30 TSS_RESULT result; 31 UINT32 decLen = 0; 32 BYTE *dec = NULL; 33 UINT64 offset; 34 TCS_HANDLE handlesLen = 0; 35 BYTE data[sizeof(UINT32)]; 36 37 if ((result = obj_context_transport_init(tspContext))) 38 return result; 39 40 LogDebugFn("Executing in a transport session"); 41 42 offset = 0; 43 Trspi_LoadBlob_UINT32(&offset, bytesRequested, data); 44 45 if ((result = obj_context_transport_execute(tspContext, TPM_ORD_GetRandom, sizeof(data), 46 data, NULL, &handlesLen, NULL, NULL, NULL, 47 &decLen, &dec))) 48 return result; 49 50 *randomBytes = dec; 51 52 return result; 53 54} 55 56TSS_RESULT 57Transport_StirRandom(TSS_HCONTEXT tspContext, /* in */ 58 UINT32 inDataSize, /* in */ 59 BYTE * inData) /* in */ 60{ 61 TSS_RESULT result; 62 UINT64 offset; 63 UINT32 dataLen; 64 TCS_HANDLE handlesLen = 0; 65 BYTE *data; 66 67 if ((result = obj_context_transport_init(tspContext))) 68 return result; 69 70 LogDebugFn("Executing in a transport session"); 71 72 dataLen = sizeof(UINT32) + inDataSize; 73 if ((data = malloc(dataLen)) == NULL) { 74 LogError("malloc of %u bytes failed", dataLen); 75 return TSPERR(TSS_E_OUTOFMEMORY); 76 } 77 78 offset = 0; 79 Trspi_LoadBlob_UINT32(&offset, inDataSize, data); 80 Trspi_LoadBlob(&offset, inDataSize, data, inData); 81 82 result = obj_context_transport_execute(tspContext, TPM_ORD_StirRandom, dataLen, data, NULL, 83 &handlesLen, NULL, NULL, NULL, NULL, NULL); 84 free(data); 85 86 return result; 87} 88#endif 89 90