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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 <time.h>
#include <errno.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
secret_TakeOwnership(TSS_HKEY hEndorsementPubKey,
TSS_HTPM hTPM,
TSS_HKEY hKeySRK,
TPM_AUTH * auth,
UINT32 * encOwnerAuthLength,
BYTE * encOwnerAuth, UINT32 * encSRKAuthLength, BYTE * encSRKAuth)
{
TSS_RESULT result;
UINT32 endorsementKeySize;
BYTE *endorsementKey;
TSS_KEY dummyKey;
UINT64 offset;
TCPA_SECRET ownerSecret;
TCPA_SECRET srkSecret;
TCPA_DIGEST digest;
TSS_HPOLICY hSrkPolicy;
TSS_HPOLICY hOwnerPolicy;
UINT32 srkKeyBlobLength;
BYTE *srkKeyBlob;
TSS_HCONTEXT tspContext;
UINT32 ownerMode, srkMode;
Trspi_HashCtx hashCtx;
if ((result = obj_tpm_get_tsp_context(hTPM, &tspContext)))
return result;
/*************************************************
* First, get the policy objects and check them for how
* to handle the secrets. If they cannot be found
* or there is an error, then we must fail
**************************************************/
/* First get the Owner Policy */
if ((result = obj_tpm_get_policy(hTPM, TSS_POLICY_USAGE, &hOwnerPolicy)))
return result;
/* Now get the SRK Policy */
if ((result = obj_rsakey_get_policy(hKeySRK, TSS_POLICY_USAGE, &hSrkPolicy, NULL)))
return result;
if ((result = obj_policy_get_mode(hOwnerPolicy, &ownerMode)))
return result;
if ((result = obj_policy_get_mode(hSrkPolicy, &srkMode)))
return result;
/* If the policy callback's aren't the same, that's an error if one is callback */
if (srkMode == TSS_SECRET_MODE_CALLBACK || ownerMode == TSS_SECRET_MODE_CALLBACK) {
if (srkMode != TSS_SECRET_MODE_CALLBACK || ownerMode != TSS_SECRET_MODE_CALLBACK) {
LogError("Policy callback modes for SRK policy and Owner policy differ.");
return TSPERR(TSS_E_BAD_PARAMETER);
}
}
if (ownerMode != TSS_SECRET_MODE_CALLBACK) {
/* First, get the Endorsement Public Key for Encrypting */
if ((result = obj_rsakey_get_blob(hEndorsementPubKey, &endorsementKeySize,
&endorsementKey)))
return result;
/* now stick it in a Key Structure */
offset = 0;
if ((result = UnloadBlob_TSS_KEY(&offset, endorsementKey, &dummyKey))) {
free_tspi(tspContext, endorsementKey);
return result;
}
free_tspi(tspContext, endorsementKey);
if ((result = obj_policy_get_secret(hOwnerPolicy, TR_SECRET_CTX_NEW,
&ownerSecret))) {
free(dummyKey.pubKey.key);
free(dummyKey.algorithmParms.parms);
return result;
}
if ((result = obj_policy_get_secret(hSrkPolicy, TR_SECRET_CTX_NEW, &srkSecret))) {
free(dummyKey.pubKey.key);
free(dummyKey.algorithmParms.parms);
return result;
}
/* Encrypt the Owner, SRK Authorizations */
if ((result = Trspi_RSA_Encrypt(ownerSecret.authdata, 20, encOwnerAuth,
encOwnerAuthLength, dummyKey.pubKey.key,
dummyKey.pubKey.keyLength))) {
free(dummyKey.pubKey.key);
free(dummyKey.algorithmParms.parms);
return result;
}
if ((result = Trspi_RSA_Encrypt(srkSecret.authdata, 20, encSRKAuth,
encSRKAuthLength, dummyKey.pubKey.key,
dummyKey.pubKey.keyLength))) {
free(dummyKey.pubKey.key);
free(dummyKey.algorithmParms.parms);
return result;
}
free(dummyKey.pubKey.key);
free(dummyKey.algorithmParms.parms);
} else {
*encOwnerAuthLength = 256;
*encSRKAuthLength = 256;
if ((result = obj_policy_do_takeowner(hOwnerPolicy, hTPM, hEndorsementPubKey,
*encOwnerAuthLength, encOwnerAuth)))
return result;
}
if ((result = obj_rsakey_get_blob(hKeySRK, &srkKeyBlobLength, &srkKeyBlob)))
return result;
/* Authorizatin Digest Calculation */
result = Trspi_HashInit(&hashCtx, TSS_HASH_SHA1);
result |= Trspi_Hash_UINT32(&hashCtx, TPM_ORD_TakeOwnership);
result |= Trspi_Hash_UINT16(&hashCtx, TCPA_PID_OWNER);
result |= Trspi_Hash_UINT32(&hashCtx, *encOwnerAuthLength);
result |= Trspi_HashUpdate(&hashCtx, *encOwnerAuthLength, encOwnerAuth);
result |= Trspi_Hash_UINT32(&hashCtx, *encSRKAuthLength);
result |= Trspi_HashUpdate(&hashCtx, *encSRKAuthLength, encSRKAuth);
result |= Trspi_HashUpdate(&hashCtx, srkKeyBlobLength, srkKeyBlob);
free_tspi(tspContext, srkKeyBlob);
if ((result |= Trspi_HashFinal(&hashCtx, digest.digest)))
return result;
/* HMAC for the final digest */
if ((result = secret_PerformAuth_OIAP(hTPM, TPM_ORD_TakeOwnership, hOwnerPolicy, FALSE,
&digest, auth)))
return result;
return TSS_SUCCESS;
}
#ifdef TSS_BUILD_TRANSPORT
TSS_RESULT
Transport_OwnerClear(TSS_HCONTEXT tspContext, /* in */
TPM_AUTH * ownerAuth) /* in, out */
{
TSS_RESULT result;
UINT32 handlesLen = 0;
if ((result = obj_context_transport_init(tspContext)))
return result;
LogDebugFn("Executing in a transport session");
return obj_context_transport_execute(tspContext, TPM_ORD_OwnerClear, 0, NULL, NULL,
&handlesLen, NULL, ownerAuth, NULL, NULL, NULL);
}
TSS_RESULT
Transport_ForceClear(TSS_HCONTEXT tspContext) /* in */
{
TSS_RESULT result;
UINT32 handlesLen = 0;
if ((result = obj_context_transport_init(tspContext)))
return result;
LogDebugFn("Executing in a transport session");
return obj_context_transport_execute(tspContext, TPM_ORD_ForceClear, 0, NULL, NULL,
&handlesLen, NULL, NULL, NULL, NULL, NULL);
}
#endif
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