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/*
* Licensed Materials - Property of IBM
*
* trousers - An open source TCG Software Stack
*
* (C) Copyright International Business Machines Corp. 2004-2006
*
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "trousers/tss.h"
#include "trousers/trousers.h"
#include "trousers_types.h"
#include "trousers_types.h"
#include "spi_utils.h"
#include "capabilities.h"
#include "tsplog.h"
#include "obj.h"
TSS_RESULT
Tspi_Key_CertifyKey(TSS_HKEY hKey, /* in */
TSS_HKEY hCertifyingKey, /* in */
TSS_VALIDATION * pValidationData) /* in, out */
{
TCPA_RESULT result;
TPM_AUTH certAuth;
TPM_AUTH keyAuth;
TCPA_DIGEST digest;
TCPA_NONCE antiReplay;
UINT32 CertifyInfoSize;
BYTE *CertifyInfo;
UINT32 outDataSize;
BYTE *outData;
TSS_HPOLICY hPolicy;
TSS_HPOLICY hCertPolicy;
TCS_KEY_HANDLE certifyTCSKeyHandle, keyTCSKeyHandle;
TSS_BOOL useAuthCert;
TSS_BOOL useAuthKey;
TPM_AUTH *pCertAuth = &certAuth;
TPM_AUTH *pKeyAuth = &keyAuth;
TSS_HCONTEXT tspContext;
Trspi_HashCtx hashCtx;
if ((result = obj_rsakey_get_tsp_context(hKey, &tspContext)))
return result;
if ((result = obj_rsakey_get_policy(hKey, TSS_POLICY_USAGE,
&hPolicy, &useAuthKey)))
return result;
if ((result = obj_rsakey_get_policy(hCertifyingKey, TSS_POLICY_USAGE,
&hCertPolicy, &useAuthCert)))
return result;
if ((result = obj_rsakey_get_tcs_handle(hCertifyingKey, &certifyTCSKeyHandle)))
return result;
if ((result = obj_rsakey_get_tcs_handle(hKey, &keyTCSKeyHandle)))
return result;
if (pValidationData == NULL) {
LogDebug("Internal Verify");
if ((result = get_local_random(tspContext, FALSE, sizeof(TCPA_NONCE),
(BYTE **)antiReplay.nonce)))
return result;
} else {
LogDebug("External Verify");
if (pValidationData->ulExternalDataLength < sizeof(antiReplay.nonce))
return TSPERR(TSS_E_BAD_PARAMETER);
memcpy(antiReplay.nonce, pValidationData->rgbExternalData,
sizeof(antiReplay.nonce));
}
if (useAuthCert && !useAuthKey)
return TSPERR(TSS_E_BAD_PARAMETER);
/* Setup the auths */
if (useAuthCert || useAuthKey) {
result = Trspi_HashInit(&hashCtx, TSS_HASH_SHA1);
result |= Trspi_Hash_UINT32(&hashCtx, TPM_ORD_CertifyKey);
result |= Trspi_HashUpdate(&hashCtx, sizeof(antiReplay.nonce), antiReplay.nonce);
if ((result |= Trspi_HashFinal(&hashCtx, digest.digest)))
return result;
}
if (useAuthKey) {
if ((result = secret_PerformAuth_OIAP(hKey, TPM_ORD_CertifyKey, hPolicy, FALSE,
&digest, &keyAuth)))
return result;
} else
pKeyAuth = NULL;
if (useAuthCert) {
if ((result = secret_PerformAuth_OIAP(hCertifyingKey, TPM_ORD_CertifyKey,
hCertPolicy, FALSE, &digest,
&certAuth)))
return result;
} else
pCertAuth = NULL;
/* XXX free CertifyInfo */
if ((result = TCS_API(tspContext)->CertifyKey(tspContext, certifyTCSKeyHandle,
keyTCSKeyHandle, &antiReplay, pCertAuth,
pKeyAuth, &CertifyInfoSize, &CertifyInfo,
&outDataSize, &outData)))
return result;
/* Validate auth */
if (useAuthCert || useAuthKey) {
result = Trspi_HashInit(&hashCtx, TSS_HASH_SHA1);
result |= Trspi_Hash_UINT32(&hashCtx, result);
result |= Trspi_Hash_UINT32(&hashCtx, TPM_ORD_CertifyKey);
result |= Trspi_HashUpdate(&hashCtx, CertifyInfoSize, CertifyInfo);
result |= Trspi_Hash_UINT32(&hashCtx, outDataSize);
result |= Trspi_HashUpdate(&hashCtx, outDataSize, outData);
if ((result |= Trspi_HashFinal(&hashCtx, digest.digest)))
return result;
if (useAuthKey)
if ((result = obj_policy_validate_auth_oiap(hPolicy, &digest, &keyAuth)))
return result;
if (useAuthCert)
if ((result = obj_policy_validate_auth_oiap(hCertPolicy, &digest,
&certAuth)))
return result;
}
if (pValidationData == NULL) {
if ((result = Trspi_Hash(TSS_HASH_SHA1, CertifyInfoSize, CertifyInfo,
digest.digest)))
return result;
if ((result = __tspi_rsa_verify(hCertifyingKey, TSS_HASH_SHA1, TPM_SHA1_160_HASH_LEN,
digest.digest, outDataSize, outData)))
return TSPERR(TSS_E_VERIFICATION_FAILED);
} else {
pValidationData->ulDataLength = CertifyInfoSize;
pValidationData->rgbData = calloc_tspi(tspContext, CertifyInfoSize);
if (pValidationData->rgbData == NULL) {
LogError("malloc of %u bytes failed.", CertifyInfoSize);
return TSPERR(TSS_E_OUTOFMEMORY);
}
memcpy(pValidationData->rgbData, CertifyInfo, CertifyInfoSize);
pValidationData->ulValidationDataLength = outDataSize;
pValidationData->rgbValidationData = calloc_tspi(tspContext, outDataSize);
if (pValidationData->rgbValidationData == NULL) {
LogError("malloc of %u bytes failed.", outDataSize);
return TSPERR(TSS_E_OUTOFMEMORY);
}
memcpy(pValidationData->rgbValidationData, outData, outDataSize);
}
return TSS_SUCCESS;
}
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