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/*
* Licensed Materials - Property of IBM
*
* trousers - An open source TCG Software Stack
*
* (C) Copyright International Business Machines Corp. 2004-2007
*
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <inttypes.h>
#include "trousers/tss.h"
#include "trousers/trousers.h"
#include "trousers_types.h"
#include "spi_utils.h"
#include "capabilities.h"
#include "tsplog.h"
#include "obj.h"
TSS_RESULT
Tspi_TPM_Quote(TSS_HTPM hTPM, /* in */
TSS_HKEY hIdentKey, /* in */
TSS_HPCRS hPcrComposite, /* in */
TSS_VALIDATION * pValidationData) /* in, out */
{
TCPA_RESULT result;
TPM_AUTH privAuth;
TPM_AUTH *pPrivAuth = &privAuth;
UINT64 offset;
TCPA_DIGEST digest;
TCS_KEY_HANDLE tcsKeyHandle;
TSS_HPOLICY hPolicy;
TCPA_NONCE antiReplay;
UINT32 pcrDataSize;
BYTE pcrData[128];
UINT32 validationLength = 0;
BYTE *validationData = NULL;
UINT32 pcrDataOutSize;
BYTE *pcrDataOut;
UINT32 keyDataSize;
BYTE *keyData;
TSS_KEY keyContainer;
BYTE quoteinfo[1024];
TSS_BOOL usesAuth;
TSS_HCONTEXT tspContext;
TCPA_VERSION version = {1, 1, 0, 0};
Trspi_HashCtx hashCtx;
if ((result = obj_tpm_get_tsp_context(hTPM, &tspContext)))
return result;
if (hPcrComposite && !obj_is_pcrs(hPcrComposite))
return TSPERR(TSS_E_INVALID_HANDLE);
/* get the identKey Policy */
if ((result = obj_rsakey_get_policy(hIdentKey, TSS_POLICY_USAGE, &hPolicy, &usesAuth)))
return result;
/* get the Identity TCS keyHandle */
if ((result = obj_rsakey_get_tcs_handle(hIdentKey, &tcsKeyHandle)))
return result;
if (pValidationData == NULL) {
if ((result = get_local_random(tspContext, FALSE, sizeof(TCPA_NONCE),
(BYTE **)antiReplay.nonce)))
return result;
} else {
if (pValidationData->ulExternalDataLength < sizeof(antiReplay.nonce))
return TSPERR(TSS_E_BAD_PARAMETER);
memcpy(antiReplay.nonce, pValidationData->rgbExternalData,
sizeof(antiReplay.nonce));
}
pcrDataSize = 0;
if (hPcrComposite) {
if ((result = obj_pcrs_get_selection(hPcrComposite, &pcrDataSize, pcrData)))
return result;
}
result = Trspi_HashInit(&hashCtx, TSS_HASH_SHA1);
result |= Trspi_Hash_UINT32(&hashCtx, TPM_ORD_Quote);
result |= Trspi_HashUpdate(&hashCtx, TPM_SHA1_160_HASH_LEN, antiReplay.nonce);
result |= Trspi_HashUpdate(&hashCtx, pcrDataSize, pcrData);
if ((result |= Trspi_HashFinal(&hashCtx, digest.digest)))
return result;
if (usesAuth) {
if ((result = secret_PerformAuth_OIAP(hIdentKey, TPM_ORD_Quote, hPolicy, FALSE,
&digest, &privAuth))) {
return result;
}
pPrivAuth = &privAuth;
} else {
pPrivAuth = NULL;
}
if ((result = TCS_API(tspContext)->Quote(tspContext, tcsKeyHandle, &antiReplay, pcrDataSize,
pcrData, pPrivAuth, &pcrDataOutSize, &pcrDataOut,
&validationLength, &validationData)))
return result;
result = Trspi_HashInit(&hashCtx, TSS_HASH_SHA1);
result |= Trspi_Hash_UINT32(&hashCtx, result);
result |= Trspi_Hash_UINT32(&hashCtx, TPM_ORD_Quote);
result |= Trspi_HashUpdate(&hashCtx, pcrDataOutSize, pcrDataOut);
result |= Trspi_Hash_UINT32(&hashCtx, validationLength);
result |= Trspi_HashUpdate(&hashCtx, validationLength, validationData);
if ((result |= Trspi_HashFinal(&hashCtx, digest.digest)))
return result;
if (usesAuth == TRUE) {
if ((result = obj_policy_validate_auth_oiap(hPolicy, &digest, &privAuth))) {
free(pcrDataOut);
free(validationData);
return result;
}
}
if (hPcrComposite) {
TCPA_PCR_COMPOSITE pcrComp;
offset = 0;
if ((result = Trspi_UnloadBlob_PCR_COMPOSITE(&offset, pcrDataOut, &pcrComp))) {
free(pcrDataOut);
free(validationData);
return result;
}
if ((result = obj_pcrs_set_values(hPcrComposite, &pcrComp))) {
free(pcrDataOut);
free(validationData);
return result;
}
}
if ((result = Tspi_GetAttribData(hIdentKey, TSS_TSPATTRIB_KEY_BLOB,
TSS_TSPATTRIB_KEYBLOB_BLOB, &keyDataSize, &keyData))) {
free(pcrDataOut);
free(validationData);
return result;
}
/* create the validation data */
offset = 0;
memset(&keyContainer, 0, sizeof(TSS_KEY));
if ((result = UnloadBlob_TSS_KEY(&offset, keyData, &keyContainer)))
return result;
/* creating pcrCompositeHash */
Trspi_Hash(TSS_HASH_SHA1, pcrDataOutSize, pcrDataOut, digest.digest);
free(pcrDataOut);
/* generate Quote_info struct */
/* 1. add version */
offset = 0;
if (keyContainer.hdr.key12.tag == TPM_TAG_KEY12)
Trspi_LoadBlob_TCPA_VERSION(&offset, quoteinfo, version);
else
Trspi_LoadBlob_TCPA_VERSION(&offset, quoteinfo, keyContainer.hdr.key11.ver);
/* 2. add "QUOT" */
quoteinfo[offset++] = 'Q';
quoteinfo[offset++] = 'U';
quoteinfo[offset++] = 'O';
quoteinfo[offset++] = 'T';
/* 3. Composite Hash */
Trspi_LoadBlob(&offset, TCPA_SHA1_160_HASH_LEN, quoteinfo,
digest.digest);
/* 4. AntiReplay Nonce */
Trspi_LoadBlob(&offset, TCPA_SHA1_160_HASH_LEN, quoteinfo,
antiReplay.nonce);
if (pValidationData == NULL) {
/* validate the data here */
Trspi_Hash(TSS_HASH_SHA1, offset, quoteinfo, digest.digest);
if ((result = Trspi_Verify(TSS_HASH_SHA1, digest.digest, 20,
keyContainer.pubKey.key,
keyContainer.pubKey.keyLength,
validationData,
validationLength))) {
free_key_refs(&keyContainer);
free(validationData);
return result;
}
free_key_refs(&keyContainer);
} else {
free_key_refs(&keyContainer);
pValidationData->rgbValidationData = calloc_tspi(tspContext, validationLength);
if (pValidationData->rgbValidationData == NULL) {
LogError("malloc of %u bytes failed.", validationLength);
return TSPERR(TSS_E_OUTOFMEMORY);
}
pValidationData->ulValidationDataLength = validationLength;
memcpy(pValidationData->rgbValidationData, validationData, validationLength);
free(validationData);
pValidationData->rgbData = calloc_tspi(tspContext, offset);
if (pValidationData->rgbData == NULL) {
LogError("malloc of %" PRIu64 " bytes failed.", offset);
free_tspi(tspContext, pValidationData->rgbValidationData);
pValidationData->rgbValidationData = NULL;
pValidationData->ulValidationDataLength = 0;
return TSPERR(TSS_E_OUTOFMEMORY);
}
pValidationData->ulDataLength = (UINT32)offset;
memcpy(pValidationData->rgbData, quoteinfo, offset);
}
return TSS_SUCCESS;
}
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