static void compute_key_digest(TPM_REQUEST *req, TPM_DIGEST *digest)
{
tpm_sha1_ctx_t ctx;
TPM_HANDLE h1, h2;
TPM_KEY_DATA *k1, *k2;
BYTE *ptr;
UINT32 len, offset = tpm_get_in_param_offset(req->ordinal);
/* handle some exceptions */
if (req->ordinal == TPM_ORD_FlushSpecific) offset = 0;
else if (req->ordinal == TPM_ORD_OwnerReadInternalPub) offset = 4;
/* compute public key digests */
if (offset == 0) {
debug("no handles");
memset(digest, 0, sizeof(TPM_DIGEST));
} else if (offset == 4) {
debug("one handle");
ptr = req->param; len = 4;
tpm_unmarshal_TPM_HANDLE(&ptr, &len, &h1);
k1 = tpm_get_key(h1);
if (k1 != NULL && tpm_compute_key_data_digest(k1, digest) == 0) {
debug("key found");
/* compute outer hash */
tpm_sha1_init(&ctx);
tpm_sha1_update(&ctx, digest->digest, sizeof(digest->digest));
tpm_sha1_final(&ctx, digest->digest);
} else {
memset(digest, 0, sizeof(TPM_DIGEST));
}
} else if (offset == 8) {
TPM_DIGEST digest2;
debug("two handles");
ptr = req->param; len = 8;
tpm_unmarshal_TPM_HANDLE(&ptr, &len, &h1);
tpm_unmarshal_TPM_HANDLE(&ptr, &len, &h2);
k1 = tpm_get_key(h1);
k2 = tpm_get_key(h2);
if (k1 != NULL && tpm_compute_key_data_digest(k1, digest) == 0
&& k2 != NULL && tpm_compute_key_data_digest(k2, &digest2) == 0) {
debug("two keys found");
/* compute outer hash */
tpm_sha1_init(&ctx);
tpm_sha1_update(&ctx, digest->digest, sizeof(digest->digest));
tpm_sha1_update(&ctx, digest2.digest, sizeof(digest2.digest));
tpm_sha1_final(&ctx, digest->digest);
} else {
memset(digest, 0, sizeof(TPM_DIGEST));
}
} else {
memset(digest, 0, sizeof(TPM_DIGEST));
}
}
TPM_RESULT TPM_ReleaseTransportSigned(TPM_KEY_HANDLE keyHandle,
TPM_NONCE *antiReplay,
TPM_AUTH *auth1, TPM_AUTH *auth2,
TPM_MODIFIER_INDICATOR *locality,
TPM_CURRENT_TICKS *currentTicks,
UINT32 *sigSize, BYTE **sig)
{
TPM_RESULT res;
TPM_KEY_DATA *key;
TPM_SESSION_DATA *session;
BYTE buf[30 + 20];
info("TPM_ReleaseTransportSigned()");
/* get key */
key = tpm_get_key(keyHandle);
if (key == NULL) return TPM_INVALID_KEYHANDLE;
/* verify authorization */
if (auth2->authHandle != TPM_INVALID_HANDLE
|| key->authDataUsage != TPM_AUTH_NEVER) {
res = tpm_verify_auth(auth1, key->usageAuth, keyHandle);
if (res != TPM_SUCCESS) return res;
session = tpm_get_transport(auth2->authHandle);
if (session == NULL) return TPM_INVALID_AUTHHANDLE;
res = tpm_verify_auth(auth2, session->transInternal.authData, TPM_INVALID_HANDLE);
if (res != TPM_SUCCESS) return (res == TPM_AUTHFAIL) ? TPM_AUTH2FAIL : res;
} else {
session = tpm_get_transport(auth1->authHandle);
if (session == NULL) return TPM_INVALID_AUTHHANDLE;
res = tpm_verify_auth(auth1, session->transInternal.authData, TPM_INVALID_HANDLE);
if (res != TPM_SUCCESS) return res;
}
/* invalidate transport session */
auth1->continueAuthSession = FALSE;
/* logging must be enabled */
if (!(session->transInternal.transPublic.transAttributes & TPM_TRANSPORT_LOG))
return TPM_BAD_MODE;
*locality = tpmData.stany.flags.localityModifier;
memcpy(currentTicks, &tpmData.stany.data.currentTicks, sizeof(TPM_CURRENT_TICKS));
transport_log_out(auth1->digest, &session->transInternal.transDigest);
/* setup a TPM_SIGN_INFO structure */
memcpy(&buf[0], (uint8_t*)"\x00\x05TRAN", 6);
memcpy(&buf[6], antiReplay->nonce, 20);
memcpy(&buf[26], (uint8_t*)"\x00\x00\x00\x14", 4);
memcpy(&buf[30], session->transInternal.transDigest.digest, 20);
/* sign info structure */
if (key->sigScheme == TPM_SS_RSASSAPKCS1v15_SHA1) {
tpm_sha1_ctx_t ctx;
debug("TPM_SS_RSASSAPKCS1v15_SHA1");
tpm_sha1_init(&ctx);
tpm_sha1_update(&ctx, buf, sizeof(buf));
tpm_sha1_final(&ctx, buf);
res = tpm_sign(key, auth1, FALSE, buf, SHA1_DIGEST_LENGTH, sig, sigSize);
} else if (key->sigScheme == TPM_SS_RSASSAPKCS1v15_INFO) {
debug("TPM_SS_RSASSAPKCS1v15_INFO");
res = tpm_sign(key, auth1, TRUE, buf, sizeof(buf), sig, sigSize);
} else {
debug("unsupported signature scheme: %02x", key->sigScheme);
res = TPM_INVALID_KEYUSAGE;
}
return res;
}
TPM_RESULT TPM_KeyControlOwner(TPM_KEY_HANDLE keyHandle, UINT32 bitName,
BOOL bitValue, TPM_AUTH *auth1)
{
TPM_RESULT res;
TPM_KEY_DATA *key;
info("TPM_KeyControlOwner()");
/* get key */
key = tpm_get_key(keyHandle);
if (key == NULL) return TPM_INVALID_KEYHANDLE;
/* verify authorization */
res = tpm_verify_auth(auth1, tpmData.permanent.data.ownerAuth, TPM_KH_OWNER);
if (res != TPM_SUCCESS) return res;
/* get bit name */
switch (bitName) {
case TPM_KEY_CONTROL_OWNER_EVICT:
if (bitValue) {
int i, num = 0;
for (i = 0; i < TPM_MAX_KEYS; i++) {
if (!tpmData.permanent.data.keys[i].valid ||
!(tpmData.permanent.data.keys[i].keyControl
& TPM_KEY_CONTROL_OWNER_EVICT)) num++;
}
if (num < 2) return TPM_NOSPACE;
if (key->parentPCRStatus || (key->keyFlags & TPM_KEY_FLAG_VOLATILE))
return TPM_BAD_PARAMETER;
key->keyControl |= TPM_KEY_CONTROL_OWNER_EVICT;
} else {
key->keyControl &= ~TPM_KEY_CONTROL_OWNER_EVICT;
}
return TPM_SUCCESS;
default:
return TPM_BAD_PARAMETER;
}
}
TPM_RESULT TPM_KeyControlOwner(TPM_KEY_HANDLE keyHandle, TPM_PUBKEY pubKey,
UINT32 bitName, BOOL bitValue, TPM_AUTH *auth1)
{
TPM_RESULT res;
TPM_KEY_DATA *key;
TPM_PUBKEY pubKey2;
TPM_DIGEST keyDigest, keyDigest2;
info("TPM_KeyControlOwner()");
/* get key */
key = tpm_get_key(keyHandle);
if (key == NULL) return TPM_INVALID_KEYHANDLE;
/* verify authorization */
res = tpm_verify_auth(auth1, tpmData.permanent.data.ownerAuth, TPM_KH_OWNER);
if (res != TPM_SUCCESS) return res;
/* verify public key */
if (tpm_compute_pubkey_digest(&pubKey, &keyDigest)) {
debug("tpm_compute_pubkey_digest() failed");
return TPM_FAIL;
}
if (tpm_extract_pubkey(key, &pubKey2)) {
debug("tpm_extraxt_pubkey() failed.");
return TPM_FAIL;
}
if (tpm_compute_pubkey_digest(&pubKey2, &keyDigest2)) {
debug("tpm_compute_pubkey_digest() failed");
free_TPM_PUBKEY(pubKey2);
return TPM_FAIL;
}
free_TPM_PUBKEY(pubKey2);
if (memcmp(&keyDigest, &keyDigest2, sizeof(TPM_DIGEST)) != 0)
return TPM_BAD_PARAMETER;
/* get bit name */
debug("bitName = %d", bitName);
if (bitName & TPM_KEY_CONTROL_OWNER_EVICT) {
if (bitValue) {
int i, num = 0;
for (i = 0; i < TPM_MAX_KEYS; i++) {
if (!tpmData.permanent.data.keys[i].payload ||
!(tpmData.permanent.data.keys[i].keyControl
& TPM_KEY_CONTROL_OWNER_EVICT)) num++;
}
if (num < 2) return TPM_NOSPACE;
if (key->parentPCRStatus || (key->keyFlags & TPM_KEY_FLAG_VOLATILE))
return TPM_BAD_PARAMETER;
key->keyControl |= TPM_KEY_CONTROL_OWNER_EVICT;
} else {
key->keyControl &= ~TPM_KEY_CONTROL_OWNER_EVICT;
}
} else {
return TPM_BAD_MODE;
}
return TPM_SUCCESS;
}
TPM_RESULT TPM_ChangeAuth(TPM_KEY_HANDLE parentHandle,
TPM_PROTOCOL_ID protocolID, TPM_ENCAUTH *newAuth,
TPM_ENTITY_TYPE entityType, UINT32 encDataSize,
BYTE *encData, TPM_AUTH *auth1, TPM_AUTH *auth2,
UINT32 *outDataSize, BYTE **outData)
{
TPM_RESULT res;
TPM_KEY_DATA *parent;
TPM_SESSION_DATA *session;
TPM_SECRET plainAuth;
info("TPM_ChangeAuth()");
/* get parent key */
parent = tpm_get_key(parentHandle);
if (parent == NULL) return TPM_INVALID_KEYHANDLE;
/* verify entity authorization */
auth2->continueAuthSession = FALSE;
session = tpm_get_auth(auth2->authHandle);
if (session->type != TPM_ST_OIAP) return TPM_BAD_MODE;
/* verify parent authorization */
res = tpm_verify_auth(auth1, parent->usageAuth, parentHandle);
if (res != TPM_SUCCESS) return res;
auth1->continueAuthSession = FALSE;
session = tpm_get_auth(auth1->authHandle);
if (session->type != TPM_ST_OSAP) return TPM_BAD_MODE;
/* decrypt auth */
tpm_decrypt_auth_secret(*newAuth, session->sharedSecret,
&session->lastNonceEven, plainAuth);
/* decrypt the entity, replace authData, and encrypt it again */
if (entityType == TPM_ET_DATA) {
TPM_SEALED_DATA seal;
BYTE *seal_buf;
/* decrypt entity */
if (decrypt_sealed_data(parent, encData, encDataSize,
&seal, &seal_buf)) return TPM_DECRYPT_ERROR;
/* verify auth2 */
res = tpm_verify_auth(auth2, seal.authData, TPM_INVALID_HANDLE);
if (res != TPM_SUCCESS) return (res == TPM_AUTHFAIL) ? TPM_AUTH2FAIL : res;
/* change authData and use it also for auth2 */
memcpy(seal.authData, plainAuth, sizeof(TPM_SECRET));
/* encrypt entity */
*outDataSize = parent->key.size >> 3;
*outData = tpm_malloc(*outDataSize);
if (encrypt_sealed_data(parent, &seal, *outData, outDataSize)) {
tpm_free(encData);
tpm_free(seal_buf);
return TPM_ENCRYPT_ERROR;
}
tpm_free(seal_buf);
} else if (entityType == TPM_ET_KEY) {
TPM_RESULT TPM_EstablishTransport(TPM_KEY_HANDLE encHandle,
TPM_TRANSPORT_PUBLIC *transPublic,
UINT32 secretSize, BYTE *secret,
TPM_AUTH *auth1,
TPM_TRANSHANDLE *transHandle,
TPM_MODIFIER_INDICATOR *locality,
TPM_CURRENT_TICKS *currentTicks,
TPM_NONCE *transNonceEven)
{
TPM_RESULT res;
TPM_KEY_DATA *key;
TPM_TRANSPORT_AUTH trans_auth;
TPM_SESSION_DATA *session;
info("TPM_EstablishTransport()");
/* setup authorization data */
if (encHandle == TPM_KH_TRANSPORT) {
if (auth1->authHandle != TPM_INVALID_HANDLE) return TPM_BADTAG;
if (transPublic->transAttributes & TPM_TRANSPORT_ENCRYPT) return TPM_BAD_SCHEME;
if (secretSize != 20) return TPM_BAD_PARAM_SIZE;
memcpy(trans_auth.authData, secret, 20);
} else {
/* get key and verify its usage */
key = tpm_get_key(encHandle);
if (key == NULL) return TPM_INVALID_KEYHANDLE;
if (key->keyUsage != TPM_KEY_STORAGE && key->keyUsage != TPM_KEY_LEGACY)
return TPM_INVALID_KEYUSAGE;
/* verify authorization */
if (key->authDataUsage != TPM_AUTH_NEVER) {
res = tpm_verify_auth(auth1, key->usageAuth, encHandle);
if (res != TPM_SUCCESS) return res;
if (decrypt_transport_auth(key, secret, secretSize, &trans_auth))
return TPM_DECRYPT_ERROR;
}
}
/* check whether the transport has to be encrypted */
if (transPublic->transAttributes & TPM_TRANSPORT_ENCRYPT) {
if (tpmData.permanent.flags.FIPS
&& transPublic->algID == TPM_ALG_MGF1) return TPM_INAPPROPRIATE_ENC;
/* until now, only MGF1 is supported */
if (transPublic->algID != TPM_ALG_MGF1) return TPM_BAD_KEY_PROPERTY;
}
/* initialize transport session */
tpm_get_random_bytes(transNonceEven->nonce, sizeof(transNonceEven->nonce));
*transHandle = tpm_get_free_session(TPM_ST_TRANSPORT);
session = tpm_get_transport(*transHandle);
if (session == NULL) return TPM_RESOURCES;
session->transInternal.transHandle = *transHandle;
memset(&session->transInternal.transDigest, 0, sizeof(TPM_DIGEST));
memcpy(&session->transInternal.transPublic, transPublic,
sizeof_TPM_TRANSPORT_PUBLIC((*transPublic)));
memcpy(&session->transInternal.transNonceEven, transNonceEven, sizeof(TPM_NONCE));
memcpy(&session->nonceEven, transNonceEven, sizeof(TPM_NONCE));
memcpy(&session->transInternal.authData, trans_auth.authData, sizeof(TPM_AUTHDATA));
*locality = tpmData.stany.flags.localityModifier;
memcpy(currentTicks, &tpmData.stany.data.currentTicks, sizeof(TPM_CURRENT_TICKS));
/* perform transport logging */
if (transPublic->transAttributes & TPM_TRANSPORT_LOG) {
tpm_sha1_ctx_t sha1;
BYTE *ptr, buf[4 + 4 + 4 + sizeof_TPM_CURRENT_TICKS(x) + 20];
UINT32 len;
/* log input */
memset(buf, 0, sizeof(buf));
transport_log_in(auth1->digest, buf, &session->transInternal.transDigest);
/* compute digest of output parameters and log output */
ptr = buf; len = sizeof(buf);
tpm_marshal_UINT32(&ptr, &len, TPM_SUCCESS);
tpm_marshal_TPM_COMMAND_CODE(&ptr, &len, TPM_ORD_EstablishTransport);
tpm_marshal_TPM_MODIFIER_INDICATOR(&ptr, &len, *locality);
tpm_marshal_TPM_CURRENT_TICKS(&ptr, &len, currentTicks);
tpm_marshal_TPM_NONCE(&ptr, &len, transNonceEven);
tpm_sha1_init(&sha1);
tpm_sha1_update(&sha1, buf, sizeof(buf));
tpm_sha1_final(&sha1, buf);
transport_log_out(buf, &session->transInternal.transDigest);
}
/* check whether this is a exclusive transport session */
if (transPublic->transAttributes & TPM_TRANSPORT_EXCLUSIVE) {
tpmData.stany.flags.transportExclusive = TRUE;
tpmData.stany.data.transExclusive = *transHandle;
}
auth1->continueAuthSession = FALSE;
return TPM_SUCCESS;
}
TPM_RESULT TPM_LoadContext(TPM_HANDLE entityHandle, BOOL keepHandle,
UINT32 contextSize, TPM_CONTEXT_BLOB *contextBlob,
TPM_HANDLE *handle)
{
TPM_CONTEXT_SENSITIVE context;
BYTE *context_buf;
TPM_SESSION_DATA *session;
TPM_DAA_SESSION_DATA *sessionDAA;
TPM_KEY_DATA *key;
TPM_DIGEST digest;
int i = 0;
info("TPM_LoadContext()");
if (decrypt_context(contextBlob->additionalData, contextBlob->additionalSize,
contextBlob->sensitiveData, contextBlob->sensitiveSize,
&context, &context_buf)) return TPM_DECRYPT_ERROR;
/* validate structure */
if (compute_context_digest(contextBlob, &digest)
|| memcmp(&digest, &contextBlob->integrityDigest, sizeof(TPM_DIGEST))) {
tpm_free(context_buf);
return TPM_BADCONTEXT;
}
if (contextBlob->resourceType == TPM_RT_KEY) {
/* check contextNonce */
if (context.internalData.key.parentPCRStatus
|| (context.internalData.key.keyFlags & TPM_KEY_FLAG_VOLATILE)) {
if (memcmp(&context.contextNonce, &tpmData.stclear.data.contextNonceKey,
sizeof(TPM_NONCE)) != 0) {
tpm_free(context_buf);
return TPM_BADCONTEXT;
}
}
/* check handle */
key = tpm_get_key_slot(entityHandle);
if (key == NULL || !key->payload) {
if (keepHandle) {
tpm_free(context_buf);
return TPM_BAD_HANDLE;
}
*handle = tpm_get_free_key();
if (*handle == TPM_INVALID_HANDLE) {
tpm_free(context_buf);
return TPM_RESOURCES;
}
key = &tpmData.permanent.data.keys[HANDLE_TO_INDEX(*handle)];
} else {
*handle = entityHandle;
}
/* reload resource */
memcpy(key, &context.internalData.key, sizeof(TPM_KEY_DATA));
tpm_rsa_copy_key(&key->key, &context.internalData.key.key);
} else if (contextBlob->resourceType == TPM_RT_DAA_TPM) {
/* check contextNonce */
if (memcmp(&context.contextNonce, &tpmData.stany.data.contextNonceSession,
sizeof(TPM_NONCE)) != 0) {
tpm_free(context_buf);
return TPM_BADCONTEXT;
}
/* check context list */
for (i = 0; i < TPM_MAX_SESSION_LIST; i++)
if (tpmData.stany.data.contextList[i] == contextBlob->contextCount) break;
if (i >= TPM_MAX_SESSION_LIST) {
tpm_free(context_buf);
return TPM_BADCONTEXT;
}
tpmData.stany.data.contextList[i] = 0;
/* check handle */
info("entityHandle = %08x, keepHandle = %d", entityHandle, keepHandle);
sessionDAA = tpm_get_daa_slot(entityHandle);
if (sessionDAA == NULL) {
if (keepHandle) {
tpm_free(context_buf);
return TPM_BAD_HANDLE;
}
*handle = tpm_get_free_daa_session();
if (*handle == TPM_INVALID_HANDLE) {
tpm_free(context_buf);
return TPM_RESOURCES;
}
sessionDAA = &tpmData.stany.data.sessionsDAA[HANDLE_TO_INDEX(*handle)];
} else if (sessionDAA->type != TPM_ST_INVALID) {
if (keepHandle) {
tpm_free(context_buf);
return TPM_BAD_HANDLE;
}
*handle = tpm_get_free_daa_session();
if (*handle == TPM_INVALID_HANDLE) {
tpm_free(context_buf);
return TPM_RESOURCES;
}
sessionDAA = &tpmData.stany.data.sessionsDAA[HANDLE_TO_INDEX(*handle)];
} else {
if (HANDLE_TO_RT(entityHandle) != TPM_RT_DAA_TPM) {
if (keepHandle) {
tpm_free(context_buf);
return TPM_BAD_HANDLE;
}
*handle = tpm_get_free_daa_session();
if (*handle == TPM_INVALID_HANDLE) {
tpm_free(context_buf);
return TPM_RESOURCES;
}
sessionDAA = &tpmData.stany.data.sessionsDAA[HANDLE_TO_INDEX(*handle)];
} else
*handle = entityHandle;
}
/* reload resource */
tpmData.stany.data.currentDAA = *handle;
info("stany.data.currentDAA := %.8x", *handle);
memset(sessionDAA, 0, sizeof(TPM_DAA_SESSION_DATA));
memcpy(sessionDAA, &context.internalData.sessionDAA, context.internalSize);
} else {
/* check contextNonce */
if (memcmp(&context.contextNonce, &tpmData.stany.data.contextNonceSession,
sizeof(TPM_NONCE)) != 0) {
tpm_free(context_buf);
return TPM_BADCONTEXT;
}
if (context.internalData.session.type == TPM_ST_OSAP
&& tpm_get_key(context.internalData.session.handle) == NULL) {
tpm_free(context_buf);
return TPM_RESOURCEMISSING;
}
/* check context list */
for (i = 0; i < TPM_MAX_SESSION_LIST; i++)
if (tpmData.stany.data.contextList[i] == contextBlob->contextCount) break;
if (i >= TPM_MAX_SESSION_LIST) {
tpm_free(context_buf);
return TPM_BADCONTEXT;
}
tpmData.stany.data.contextList[i] = 0;
/* check handle */
session = tpm_get_session_slot(entityHandle);
if (session == NULL || session->type != TPM_ST_INVALID) {
if (keepHandle) {
tpm_free(context_buf);
return TPM_BAD_HANDLE;
}
*handle = tpm_get_free_session(context.internalData.session.type);
if (*handle == TPM_INVALID_HANDLE) {
tpm_free(context_buf);
return TPM_RESOURCES;
}
session = &tpmData.stany.data.sessions[HANDLE_TO_INDEX(*handle)];
} else {
*handle = entityHandle;
}
/* reload resource */
memcpy(session, &context.internalData.session, sizeof(TPM_SESSION_DATA));
}
tpm_free(context_buf);
return TPM_SUCCESS;
}
TPM_RESULT TPM_SaveContext(TPM_HANDLE handle, TPM_RESOURCE_TYPE resourceType,
const BYTE label[16], UINT32 *contextSize,
TPM_CONTEXT_BLOB *contextBlob)
{
TPM_CONTEXT_SENSITIVE context;
TPM_SESSION_DATA *session = NULL;
TPM_DAA_SESSION_DATA *sessionDAA = NULL;
TPM_KEY_DATA *key = NULL;
int i = 0;
info("TPM_SaveContext() resourceType = %08x", resourceType);
/* setup context data */
context.tag = TPM_TAG_CONTEXT_SENSITIVE;
context.resourceType = resourceType;
if (resourceType == TPM_RT_AUTH || resourceType == TPM_RT_TRANS) {
session = (resourceType == TPM_RT_AUTH) ? tpm_get_auth(handle) :
tpm_get_transport(handle);
if (session == NULL) return TPM_INVALID_RESOURCE;
/* store session data */
memcpy(&context.internalData.session, session, sizeof(TPM_SESSION_DATA));
context.internalSize = sizeof_TPM_SESSION_DATA((*session));
/* set context nonce */
memcpy(&context.contextNonce, &tpmData.stany.data.contextNonceSession,
sizeof(TPM_NONCE));
} else if (resourceType == TPM_RT_KEY) {
key = tpm_get_key(handle);
debug("resourceType = TPM_RT_KEY, handle = %08x, key = %p", handle, key);
if (key == NULL) return TPM_INVALID_RESOURCE;
if (key->keyControl & TPM_KEY_CONTROL_OWNER_EVICT) return TPM_OWNER_CONTROL;
/* store key data (shallow copy is ok) */
memcpy(&context.internalData.key, key, sizeof(TPM_KEY_DATA));
context.internalSize = sizeof_TPM_KEY_DATA((*key));
/* set context nonce */
memcpy(&context.contextNonce, &tpmData.stclear.data.contextNonceKey,
sizeof(TPM_NONCE));
} else if (resourceType == TPM_RT_DAA_TPM) {
sessionDAA = tpm_get_daa(handle);
if (sessionDAA == NULL) return TPM_INVALID_RESOURCE;
/* store sessionDAA data */
memcpy(&context.internalData.sessionDAA, sessionDAA,
sizeof(TPM_DAA_SESSION_DATA));
context.internalSize = sizeof(TPM_DAA_SESSION_DATA);
/* set context nonce */
memcpy(&context.contextNonce, &tpmData.stany.data.contextNonceSession,
sizeof(TPM_NONCE));
} else {
return TPM_INVALID_RESOURCE;
}
/* setup context blob */
contextBlob->tag = TPM_TAG_CONTEXTBLOB;
contextBlob->resourceType = resourceType;
contextBlob->handle = handle;
memset(&contextBlob->integrityDigest, 0, sizeof(TPM_DIGEST));
memcpy(contextBlob->label, label, sizeof(contextBlob->label));
contextBlob->additionalSize = TPM_SYM_KEY_SIZE;
contextBlob->additionalData = tpm_malloc(contextBlob->additionalSize);
if (contextBlob->additionalData == NULL) return TPM_FAIL;
tpm_get_random_bytes(contextBlob->additionalData,
contextBlob->additionalSize);
/* increment context counter */
if (resourceType == TPM_RT_KEY) {
contextBlob->contextCount = 0;
} else {
if (tpmData.stany.data.contextCount >= 0xfffffffc) {
tpm_free(contextBlob->additionalData);
return TPM_TOOMANYCONTEXTS;
}
contextBlob->contextCount = ++tpmData.stany.data.contextCount;
for (i = 0; i < TPM_MAX_SESSION_LIST; i++) {
if (tpmData.stany.data.contextList[i] == 0) break;
}
if (i >= TPM_MAX_SESSION_LIST) {
tpm_free(contextBlob->additionalData);
return TPM_NOCONTEXTSPACE;
}
tpmData.stany.data.contextCount++;
tpmData.stany.data.contextList[i] = tpmData.stany.data.contextCount;
contextBlob->contextCount = tpmData.stany.data.contextCount;
}
debug("context counter = %d", tpmData.stany.data.contextCount);
/* encrypt sensitive data */
if (encrypt_context(contextBlob->additionalData, contextBlob->additionalSize,
&context, &contextBlob->sensitiveData, &contextBlob->sensitiveSize)) {
tpm_free(contextBlob->additionalData);
return TPM_ENCRYPT_ERROR;
}
/* compute context digest */
if (compute_context_digest(contextBlob, &contextBlob->integrityDigest)) {
tpm_free(contextBlob->additionalData);
return TPM_FAIL;
}
*contextSize = sizeof_TPM_CONTEXT_BLOB((*contextBlob));
if (resourceType != TPM_RT_KEY) {
/* The TPM MUST invalidate all information regarding the resource
* except for information needed for reloading. */
if (resourceType != TPM_RT_DAA_TPM)
session->type = TPM_ST_INVALID;
else {
memset(sessionDAA, 0, sizeof(TPM_DAA_SESSION_DATA));
sessionDAA->type = TPM_ST_INVALID;
tpmData.stany.data.currentDAA = 0;
}
}
return TPM_SUCCESS;
}
TPM_RESULT TPM_CreateMigrationBlob(TPM_KEY_HANDLE parentHandle,
TPM_MIGRATE_SCHEME migrationType,
TPM_MIGRATIONKEYAUTH *migrationKeyAuth,
UINT32 encDataSize, BYTE *encData,
TPM_AUTH *auth1, TPM_AUTH *auth2,
UINT32 *randomSize, BYTE **random,
UINT32 *outDataSize, BYTE **outData)
{
TPM_RESULT res;
TPM_KEY_DATA *parent;
TPM_SESSION_DATA *session;
BYTE *key_buf;
UINT32 key_buf_size;
TPM_STORE_ASYMKEY store;
TPM_PUBKEY_DATA key;
info("TPM_CreateMigrationBlob()");
/* get parent key */
parent = tpm_get_key(parentHandle);
if (parent == NULL) return TPM_INVALID_KEYHANDLE;
/* verify parent authorization */
res = tpm_verify_auth(auth1, parent->usageAuth, parentHandle);
if (res != TPM_SUCCESS) return res;
session = tpm_get_auth(auth2->authHandle);
if (session == NULL || session->type != TPM_ST_OIAP) return TPM_AUTHFAIL;
/* verify key properties */
if (parent->keyUsage != TPM_KEY_STORAGE) return TPM_INVALID_KEYUSAGE;
/* decrypt private key */
if (tpm_decrypt_private_key(parent, encData, encDataSize,
&store, &key_buf, &key_buf_size) != 0) {
return TPM_DECRYPT_ERROR;
}
if (store.payload != TPM_PT_ASYM) {
tpm_free(key_buf);
return TPM_DECRYPT_ERROR;
}
debug("key size: %d / %d", store.privKey.keyLength, key_buf_size);
/* verify migration authorization */
res = tpm_verify_auth(auth2, store.migrationAuth, TPM_INVALID_HANDLE);
if (res != TPM_SUCCESS) {
tpm_free(key_buf);
return TPM_MIGRATEFAIL;
}
if (tpm_verify_migration_digest(migrationKeyAuth,
&tpmData.permanent.data.tpmProof)) {
debug("tpm_verify_migration_digest() failed");
tpm_free(key_buf);
return TPM_MIGRATEFAIL;
}
debug("migration authorization is valid.");
/* set public key */
if (tpm_setup_pubkey_data(&migrationKeyAuth->migrationKey, &key) != 0) {
debug("tpm_setup_pubkey() failed");
tpm_free(key_buf);
return TPM_FAIL;
}
/* perform migration */
if (migrationType == TPM_MS_REWRAP) {
/* re-encrypt raw key data */
debug("migrationType = TPM_MS_REWRAP");
*random = NULL;
*randomSize = 0;
*outDataSize = key.key.size >> 3;
*outData = tpm_malloc(*outDataSize);
if (*outData == NULL) {
free_TPM_PUBKEY_DATA(key);
tpm_free(*outData);
tpm_free(key_buf);
return TPM_FAIL;
}
if (tpm_encrypt_public(&key, key_buf, key_buf_size,
*outData, outDataSize) != 0) {
free_TPM_PUBKEY_DATA(key);
tpm_free(*outData);
tpm_free(key_buf);
return TPM_ENCRYPT_ERROR;
}
} else if (migrationType == TPM_MS_MIGRATE) {