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      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
     25 TSS_RESULT
     26 Transport_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 
     56 TSS_RESULT
     57 Transport_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