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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 "spi_utils.h"
#include "capabilities.h"
#include "tsplog.h"
#include "obj.h"
TSS_RESULT
Tspi_Data_Bind(TSS_HENCDATA hEncData, /* in */
TSS_HKEY hEncKey, /* in */
UINT32 ulDataLength, /* in */
BYTE *rgbDataToBind) /* in */
{
UINT32 encDataLength;
BYTE encData[256];
BYTE *keyData;
UINT32 keyDataLength;
TCPA_BOUND_DATA boundData;
UINT64 offset;
BYTE bdblob[256];
TCPA_RESULT result;
TSS_KEY keyContainer;
TSS_HCONTEXT tspContext;
if (rgbDataToBind == NULL)
return TSPERR(TSS_E_BAD_PARAMETER);
if (!obj_is_encdata(hEncData))
return TSPERR(TSS_E_INVALID_HANDLE);
if ((result = obj_rsakey_get_tsp_context(hEncKey, &tspContext)))
return result;
/* XXX Just get the pubkey here */
if ((result = obj_rsakey_get_blob(hEncKey, &keyDataLength, &keyData)))
return result;
offset = 0;
if ((result = UnloadBlob_TSS_KEY(&offset, keyData, &keyContainer))) {
free_tspi(tspContext, keyData);
return result;
}
free_tspi(tspContext, keyData);
if (keyContainer.keyUsage != TPM_KEY_BIND &&
keyContainer.keyUsage != TPM_KEY_LEGACY) {
result = TSPERR(TSS_E_INVALID_KEYUSAGE);
goto done;
}
if (keyContainer.pubKey.keyLength < ulDataLength) {
result = TSPERR(TSS_E_ENC_INVALID_LENGTH);
goto done;
}
if (keyContainer.algorithmParms.encScheme == TCPA_ES_RSAESPKCSv15 &&
keyContainer.keyUsage == TPM_KEY_LEGACY) {
if ((result = Trspi_RSA_PKCS15_Encrypt(rgbDataToBind, ulDataLength, encData,
&encDataLength, keyContainer.pubKey.key,
keyContainer.pubKey.keyLength)))
goto done;
} else if (keyContainer.algorithmParms.encScheme == TCPA_ES_RSAESPKCSv15 &&
keyContainer.keyUsage == TPM_KEY_BIND) {
boundData.payload = TCPA_PT_BIND;
memcpy(&boundData.ver, &VERSION_1_1, sizeof(TCPA_VERSION));
boundData.payloadData = malloc(ulDataLength);
if (boundData.payloadData == NULL) {
result = TSPERR(TSS_E_OUTOFMEMORY);
goto done;
}
memcpy(boundData.payloadData, rgbDataToBind, ulDataLength);
offset = 0;
Trspi_LoadBlob_BOUND_DATA(&offset, boundData, ulDataLength, bdblob);
if ((result = Trspi_RSA_PKCS15_Encrypt(bdblob, offset, encData,
&encDataLength, keyContainer.pubKey.key,
keyContainer.pubKey.keyLength))) {
free(boundData.payloadData);
goto done;
}
free(boundData.payloadData);
} else {
boundData.payload = TCPA_PT_BIND;
memcpy(&boundData.ver, &VERSION_1_1, sizeof(TCPA_VERSION));
boundData.payloadData = malloc(ulDataLength);
if (boundData.payloadData == NULL) {
LogError("malloc of %u bytes failed.", ulDataLength);
result = TSPERR(TSS_E_OUTOFMEMORY);
goto done;
}
memcpy(boundData.payloadData, rgbDataToBind, ulDataLength);
offset = 0;
Trspi_LoadBlob_BOUND_DATA(&offset, boundData, ulDataLength, bdblob);
if ((result = Trspi_RSA_Encrypt(bdblob, offset, encData, &encDataLength,
keyContainer.pubKey.key,
keyContainer.pubKey.keyLength))) {
free(boundData.payloadData);
goto done;
}
free(boundData.payloadData);
}
if ((result = obj_encdata_set_data(hEncData, encDataLength, encData))) {
LogError("Error in calling SetAttribData on the encrypted data object.");
result = TSPERR(TSS_E_INTERNAL_ERROR);
goto done;
}
done:
free_key_refs(&keyContainer);
return result;
}
TSS_RESULT
Tspi_Data_Unbind(TSS_HENCDATA hEncData, /* in */
TSS_HKEY hKey, /* in */
UINT32 * pulUnboundDataLength, /* out */
BYTE ** prgbUnboundData) /* out */
{
TCPA_RESULT result;
TPM_AUTH privAuth;
TCPA_DIGEST digest;
TSS_HPOLICY hPolicy;
BYTE *encData;
UINT32 encDataSize;
TCS_KEY_HANDLE tcsKeyHandle;
TSS_BOOL usesAuth;
TPM_AUTH *pPrivAuth;
TSS_HCONTEXT tspContext;
Trspi_HashCtx hashCtx;
if (pulUnboundDataLength == NULL || prgbUnboundData == NULL)
return TSPERR(TSS_E_BAD_PARAMETER);
if ((result = obj_encdata_get_tsp_context(hEncData, &tspContext)))
return result;
if ((result = obj_rsakey_get_policy(hKey, TSS_POLICY_USAGE, &hPolicy, &usesAuth)))
return result;
if ((result = obj_encdata_get_data(hEncData, &encDataSize, &encData)))
return result == (TSS_E_INVALID_OBJ_ACCESS | TSS_LAYER_TSP) ?
TSPERR(TSS_E_ENC_NO_DATA) :
result;
if ((result = obj_rsakey_get_tcs_handle(hKey, &tcsKeyHandle)))
return result;
if (usesAuth) {
result = Trspi_HashInit(&hashCtx, TSS_HASH_SHA1);
result |= Trspi_Hash_UINT32(&hashCtx, TPM_ORD_UnBind);
result |= Trspi_Hash_UINT32(&hashCtx, encDataSize);
result |= Trspi_HashUpdate(&hashCtx, encDataSize, encData);
if ((result |= Trspi_HashFinal(&hashCtx, digest.digest)))
return result;
if ((result = secret_PerformAuth_OIAP(hKey, TPM_ORD_UnBind, hPolicy, FALSE, &digest,
&privAuth)))
return result;
pPrivAuth = &privAuth;
} else {
pPrivAuth = NULL;
}
if ((result = TCS_API(tspContext)->UnBind(tspContext, tcsKeyHandle, encDataSize, encData,
pPrivAuth, pulUnboundDataLength,
prgbUnboundData)))
return result;
if (usesAuth) {
result = Trspi_HashInit(&hashCtx, TSS_HASH_SHA1);
result |= Trspi_Hash_UINT32(&hashCtx, result);
result |= Trspi_Hash_UINT32(&hashCtx, TPM_ORD_UnBind);
result |= Trspi_Hash_UINT32(&hashCtx, *pulUnboundDataLength);
result |= Trspi_HashUpdate(&hashCtx, *pulUnboundDataLength, *prgbUnboundData);
if ((result |= Trspi_HashFinal(&hashCtx, digest.digest)))
goto error;
if ((result = obj_policy_validate_auth_oiap(hPolicy, &digest, &privAuth)))
goto error;
}
if ((result = __tspi_add_mem_entry(tspContext, *prgbUnboundData)))
goto error;
return TSS_SUCCESS;
error:
free(*prgbUnboundData);
*prgbUnboundData = NULL;
*pulUnboundDataLength = 0;
return result;
}
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