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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 <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"
void
free_key_refs(TSS_KEY *key)
{
free(key->algorithmParms.parms);
key->algorithmParms.parms = NULL;
key->algorithmParms.parmSize = 0;
free(key->pubKey.key);
key->pubKey.key = NULL;
key->pubKey.keyLength = 0;
free(key->encData);
key->encData = NULL;
key->encSize = 0;
free(key->PCRInfo);
key->PCRInfo = NULL;
key->PCRInfoSize = 0;
}
void
LoadBlob_TSS_KEY(UINT64 *offset, BYTE *blob, TSS_KEY *key)
{
if (key->hdr.key12.tag == TPM_TAG_KEY12)
Trspi_LoadBlob_KEY12(offset, blob, (TPM_KEY12 *)key);
else
Trspi_LoadBlob_KEY(offset, blob, (TCPA_KEY *)key);
}
TSS_RESULT
UnloadBlob_TSS_KEY(UINT64 *offset, BYTE *blob, TSS_KEY *key)
{
UINT16 tag;
UINT64 keyOffset = *offset;
TSS_RESULT result;
Trspi_UnloadBlob_UINT16(&keyOffset, &tag, blob);
if (tag == TPM_TAG_KEY12)
result = Trspi_UnloadBlob_KEY12(offset, blob, (TPM_KEY12 *)key);
else
result = Trspi_UnloadBlob_KEY(offset, blob, (TCPA_KEY *)key);
return result;
}
TSS_RESULT
Hash_TSS_KEY(Trspi_HashCtx *c, TSS_KEY *key)
{
TSS_RESULT result;
if (key->hdr.key12.tag == TPM_TAG_KEY12)
result = Trspi_Hash_KEY12(c, (TPM_KEY12 *)key);
else
result = Trspi_Hash_KEY(c, (TCPA_KEY *)key);
return result;
}
void
LoadBlob_TSS_PRIVKEY_DIGEST(UINT64 *offset, BYTE *blob, TSS_KEY *key)
{
if (key->hdr.key12.tag == TPM_TAG_KEY12)
Trspi_LoadBlob_PRIVKEY_DIGEST12(offset, blob, (TPM_KEY12 *)key);
else
Trspi_LoadBlob_PRIVKEY_DIGEST(offset, blob, (TCPA_KEY *)key);
}
TSS_RESULT
Hash_TSS_PRIVKEY_DIGEST(Trspi_HashCtx *c, TSS_KEY *key)
{
TSS_RESULT result;
if (key->hdr.key12.tag == TPM_TAG_KEY12)
result = Trspi_Hash_PRIVKEY_DIGEST12(c, (TPM_KEY12 *)key);
else
result = Trspi_Hash_PRIVKEY_DIGEST(c, (TCPA_KEY *)key);
return result;
}
#ifdef TSS_BUILD_TRANSPORT
TSS_RESULT
Transport_EvictKey(TSS_HCONTEXT tspContext,
TCS_KEY_HANDLE hKey)
{
TSS_RESULT result;
UINT32 handlesLen;
TCS_HANDLE *handles, handle;
TPM_DIGEST pubKeyHash;
Trspi_HashCtx hashCtx;
if ((result = obj_context_transport_init(tspContext)))
return result;
LogDebugFn("Executing in a transport session");
if ((result = obj_tcskey_get_pubkeyhash(hKey, pubKeyHash.digest)))
return result;
result = Trspi_HashInit(&hashCtx, TSS_HASH_SHA1);
result |= Trspi_Hash_DIGEST(&hashCtx, pubKeyHash.digest);
if ((result |= Trspi_HashFinal(&hashCtx, pubKeyHash.digest)))
return result;
handlesLen = 1;
handle = hKey;
handles = &handle;
result = obj_context_transport_execute(tspContext, TPM_ORD_EvictKey, 0, NULL, &pubKeyHash,
&handlesLen, &handles, NULL, NULL, NULL, NULL);
return result;
}
TSS_RESULT
Transport_GetPubKey(TSS_HCONTEXT tspContext,
TCS_KEY_HANDLE hKey,
TPM_AUTH *pAuth,
UINT32 *pcPubKeySize,
BYTE **prgbPubKey)
{
TSS_RESULT result;
UINT32 handlesLen, decLen;
TCS_HANDLE *handles, handle;
BYTE *dec = NULL;
TPM_DIGEST pubKeyHash;
Trspi_HashCtx hashCtx;
if ((result = obj_context_transport_init(tspContext)))
return result;
LogDebugFn("Executing in a transport session");
if ((result = obj_tcskey_get_pubkeyhash(hKey, pubKeyHash.digest)))
return result;
result = Trspi_HashInit(&hashCtx, TSS_HASH_SHA1);
result |= Trspi_Hash_DIGEST(&hashCtx, pubKeyHash.digest);
if ((result |= Trspi_HashFinal(&hashCtx, pubKeyHash.digest)))
return result;
handlesLen = 1;
handle = hKey;
handles = &handle;
if ((result = obj_context_transport_execute(tspContext, TPM_ORD_GetPubKey, 0, NULL,
&pubKeyHash, &handlesLen, &handles, pAuth, NULL,
&decLen, &dec)))
return result;
*prgbPubKey = dec;
*pcPubKeySize = decLen;
return result;
}
TSS_RESULT
Transport_CreateWrapKey(TSS_HCONTEXT tspContext, /* in */
TCS_KEY_HANDLE hWrappingKey, /* in */
TPM_ENCAUTH *KeyUsageAuth, /* in */
TPM_ENCAUTH *KeyMigrationAuth, /* in */
UINT32 keyInfoSize, /* in */
BYTE * keyInfo, /* in */
UINT32 * keyDataSize, /* out */
BYTE ** keyData, /* out */
TPM_AUTH * pAuth) /* in, out */
{
TSS_RESULT result;
UINT32 handlesLen, decLen;
TCS_HANDLE *handles, handle;
BYTE *dec = NULL;
TPM_DIGEST pubKeyHash;
Trspi_HashCtx hashCtx;
UINT64 offset;
BYTE *data;
if ((result = obj_context_transport_init(tspContext)))
return result;
LogDebugFn("Executing in a transport session");
if ((result = obj_tcskey_get_pubkeyhash(hWrappingKey, pubKeyHash.digest)))
return result;
result = Trspi_HashInit(&hashCtx, TSS_HASH_SHA1);
result |= Trspi_Hash_DIGEST(&hashCtx, pubKeyHash.digest);
if ((result |= Trspi_HashFinal(&hashCtx, pubKeyHash.digest)))
return result;
handlesLen = 1;
handle = hWrappingKey;
handles = &handle;
if ((data = malloc(2 * sizeof(TPM_ENCAUTH) + keyInfoSize)) == NULL) {
LogError("malloc of %zd bytes failed", 2 * sizeof(TPM_ENCAUTH) + keyInfoSize);
return TSPERR(TSS_E_OUTOFMEMORY);
}
offset = 0;
Trspi_LoadBlob(&offset, sizeof(TPM_ENCAUTH), data, KeyUsageAuth->authdata);
Trspi_LoadBlob(&offset, sizeof(TPM_ENCAUTH), data, KeyMigrationAuth->authdata);
Trspi_LoadBlob(&offset, keyInfoSize, data, keyInfo);
if ((result = obj_context_transport_execute(tspContext, TPM_ORD_CreateWrapKey,
(2 * sizeof(TPM_ENCAUTH) + keyInfoSize), data,
&pubKeyHash, &handlesLen, &handles, pAuth, NULL,
&decLen, &dec)))
goto done;
*keyDataSize = decLen;
*keyData = dec;
done:
free(data);
return result;
}
TSS_RESULT
Transport_LoadKeyByBlob(TSS_HCONTEXT tspContext,
TCS_KEY_HANDLE hParentKey,
UINT32 ulBlobLength,
BYTE* rgbBlobData,
TPM_AUTH* pAuth,
TCS_KEY_HANDLE* phKey,
TPM_KEY_HANDLE* phSlot)
{
TSS_RESULT result;
UINT32 handlesLen, decLen;
TCS_HANDLE *handles, handle;
BYTE *dec = NULL;
TPM_DIGEST pubKeyHash;
Trspi_HashCtx hashCtx;
if ((result = obj_context_transport_init(tspContext)))
return result;
LogDebugFn("Executing in a transport session");
if ((result = obj_tcskey_get_pubkeyhash(hParentKey, pubKeyHash.digest)))
return result;
result = Trspi_HashInit(&hashCtx, TSS_HASH_SHA1);
result |= Trspi_Hash_DIGEST(&hashCtx, pubKeyHash.digest);
if ((result |= Trspi_HashFinal(&hashCtx, pubKeyHash.digest)))
return result;
handlesLen = 1;
handle = hParentKey;
handles = &handle;
if ((result = obj_context_transport_execute(tspContext, TPM_ORD_LoadKey2, ulBlobLength,
rgbBlobData, &pubKeyHash, &handlesLen,
&handles, pAuth, NULL, &decLen, &dec)))
return result;
if (handlesLen == 1)
*phKey = *(TCS_KEY_HANDLE *)handles;
else
result = TSPERR(TSS_E_INTERNAL_ERROR);
free(dec);
return result;
}
/* This function both encrypts the handle of the pubkey being requested and requires the hash
* of that pubkey for the transport log when logging is enabled. */
TSS_RESULT
Transport_OwnerReadInternalPub(TSS_HCONTEXT tspContext, /* in */
TCS_KEY_HANDLE hKey, /* in */
TPM_AUTH* pOwnerAuth, /* in, out */
UINT32* punPubKeySize, /* out */
BYTE** ppbPubKeyData) /* out */
{
UINT64 offset;
TSS_RESULT result;
UINT32 handlesLen = 0, decLen;
TPM_DIGEST pubKeyHash;
Trspi_HashCtx hashCtx;
BYTE *dec = NULL, data[sizeof(TCS_KEY_HANDLE)];
if ((result = obj_context_transport_init(tspContext)))
return result;
LogDebugFn("Executing in a transport session");
if ((result = obj_tcskey_get_pubkeyhash(hKey, pubKeyHash.digest)))
return result;
result = Trspi_HashInit(&hashCtx, TSS_HASH_SHA1);
result |= Trspi_Hash_DIGEST(&hashCtx, pubKeyHash.digest);
if ((result |= Trspi_HashFinal(&hashCtx, pubKeyHash.digest)))
return result;
offset = 0;
Trspi_LoadBlob_UINT32(&offset, hKey, data);
if ((result = obj_context_transport_execute(tspContext, TPM_ORD_OwnerReadInternalPub,
sizeof(data), data, &pubKeyHash, &handlesLen,
NULL, pOwnerAuth, NULL, &decLen, &dec)))
return result;
*punPubKeySize = decLen;
*ppbPubKeyData = dec;
return result;
}
#endif
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