| /******************************************************************************* |
| * Copyright 2017, Fraunhofer SIT sponsored by Infineon Technologies AG |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright notice, |
| * this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright notice, |
| * this list of conditions and the following disclaimer in the documentation |
| * and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
| * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
| * THE POSSIBILITY OF SUCH DAMAGE. |
| *******************************************************************************/ |
| |
| #include <gcrypt.h> |
| |
| #include "tss2_esys.h" |
| #include "sysapi_util.h" |
| |
| #include "esys_crypto.h" |
| #include "esys_iutil.h" |
| #include "esys_mu.h" |
| #define LOGMODULE esys |
| #include "util/log.h" |
| |
| /** Context to hold temporary values for iesys_crypto */ |
| typedef struct _IESYS_CRYPTO_CONTEXT { |
| enum { |
| IESYS_CRYPTOGCRY_TYPE_HASH = 1, |
| IESYS_CRYPTOGCRY_TYPE_HMAC, |
| } type; /**< The type of hontext to hold; hash or hmac */ |
| union { |
| struct { |
| gcry_md_hd_t gcry_context; |
| int gcry_hash_alg; |
| size_t hash_len; |
| } hash; /**< the state variables for a hash context */ |
| struct { |
| gcry_mac_hd_t gcry_context; |
| int gcry_hmac_alg; |
| size_t hmac_len; |
| } hmac; /**< the state variables for an hmac context */ |
| }; |
| } IESYS_CRYPTOGCRY_CONTEXT; |
| |
| /** Provide the digest size for a given hash algorithm |
| * |
| * This function provides the size of the digest for a given hash algorithm |
| * |
| * @param hashAlg [in] The hash algorithm to get the size for |
| * @param size [out] The side of a digest of the hash algorithm |
| * @returnval TSS2_RC_SUCCESS on success |
| * @returnval TSS2_SYS_RC_BAD_VALUE if hashAlg is unknown or unsupported |
| */ |
| TSS2_RC |
| iesys_crypto_hash_get_digest_size(TPM2_ALG_ID hashAlg, size_t * size) |
| { |
| LOG_TRACE("call: hashAlg=%"PRIu16" size=%p", hashAlg, size); |
| switch (hashAlg) { |
| case TPM2_ALG_SHA1: |
| *size = TPM2_SHA1_DIGEST_SIZE; |
| break; |
| case TPM2_ALG_SHA256: |
| *size = TPM2_SHA256_DIGEST_SIZE; |
| break; |
| case TPM2_ALG_SHA384: |
| *size = TPM2_SHA384_DIGEST_SIZE; |
| break; |
| case TPM2_ALG_SHA512: |
| *size = TPM2_SHA512_DIGEST_SIZE; |
| break; |
| case TPM2_ALG_SM3_256: |
| *size = TPM2_SM3_256_DIGEST_SIZE; |
| break; |
| default: |
| LOG_ERROR("Unsupported hash algorithm (%"PRIu16")", hashAlg); |
| return TSS2_SYS_RC_BAD_VALUE; |
| } |
| LOG_TRACE("return: *size=%zu", *size); |
| return TSS2_RC_SUCCESS; |
| } |
| |
| |
| TSS2_RC |
| iesys_cryptogcry_hash_start(IESYS_CRYPTO_CONTEXT_BLOB ** context, |
| TPM2_ALG_ID hashAlg) |
| { |
| LOG_TRACE("call: context=%p hashAlg=%"PRIu16, context, hashAlg); |
| return_if_null(context, "Context is NULL", TSS2_SYS_RC_BAD_REFERENCE); |
| IESYS_CRYPTOGCRY_CONTEXT *mycontext; |
| mycontext = calloc(1, sizeof(IESYS_CRYPTOGCRY_CONTEXT)); |
| return_if_null(mycontext, "Out of Memory", TSS2_SYS_RC_GENERAL_FAILURE); |
| mycontext->type = IESYS_CRYPTOGCRY_TYPE_HASH; |
| |
| switch (hashAlg) { |
| case TPM2_ALG_SHA1: |
| mycontext->hash.gcry_hash_alg = GCRY_MD_SHA1; |
| break; |
| case TPM2_ALG_SHA256: |
| mycontext->hash.gcry_hash_alg = GCRY_MD_SHA256; |
| break; |
| case TPM2_ALG_SHA384: |
| mycontext->hash.gcry_hash_alg = GCRY_MD_SHA384; |
| break; |
| default: |
| LOG_ERROR("Unsupported hash algorithm (%"PRIu16")", hashAlg); |
| free(mycontext); |
| return TSS2_SYS_RC_GENERAL_FAILURE; |
| } |
| int hash_len = gcry_md_get_algo_dlen(mycontext->hash.gcry_hash_alg); |
| if (hash_len <= 0) { |
| LOG_ERROR("Unsupported hash algorithm (%"PRIu16")", hashAlg); |
| free(mycontext); |
| return TSS2_SYS_RC_GENERAL_FAILURE; |
| } |
| mycontext->hash.hash_len = hash_len; |
| |
| gcry_error_t r = gcry_md_open(&mycontext->hash.gcry_context, |
| mycontext->hash.gcry_hash_alg, 0); |
| if (r != 0) { |
| LOG_ERROR("GCry error."); |
| free(mycontext); |
| return TSS2_SYS_RC_GENERAL_FAILURE; |
| } |
| |
| *context = (IESYS_CRYPTO_CONTEXT_BLOB *) mycontext; |
| |
| return TSS2_RC_SUCCESS; |
| } |
| |
| TSS2_RC |
| iesys_cryptogcry_hash_update(IESYS_CRYPTO_CONTEXT_BLOB * context, |
| const uint8_t * buffer, size_t size) |
| { |
| LOG_TRACE("called for context %p, buffer %p and size %zd", context, buffer, |
| size); |
| if (context == NULL || buffer == NULL) { |
| LOG_ERROR("Null-Pointer passed"); |
| return TSS2_SYS_RC_BAD_REFERENCE; |
| } |
| IESYS_CRYPTOGCRY_CONTEXT *mycontext = (IESYS_CRYPTOGCRY_CONTEXT *) context; |
| if (mycontext->type != IESYS_CRYPTOGCRY_TYPE_HASH) { |
| LOG_ERROR("bad context"); |
| return TSS2_SYS_RC_BAD_REFERENCE; |
| } |
| |
| LOGBLOB_TRACE(buffer, size, "Updating hash with"); |
| |
| gcry_md_write(mycontext->hash.gcry_context, buffer, size); |
| |
| return TSS2_RC_SUCCESS; |
| } |
| |
| TSS2_RC |
| iesys_cryptogcry_hash_update2b(IESYS_CRYPTO_CONTEXT_BLOB * context, TPM2B * b) |
| { |
| LOG_TRACE("called for context-pointer %p and 2b-pointer %p", context, b); |
| if (context == NULL || b == NULL) { |
| LOG_ERROR("Null-Pointer passed"); |
| return TSS2_SYS_RC_BAD_REFERENCE; |
| } |
| TSS2_RC ret = iesys_cryptogcry_hash_update(context, &b->buffer[0], b->size); |
| return ret; |
| } |
| |
| TSS2_RC |
| iesys_cryptogcry_hash_finish(IESYS_CRYPTO_CONTEXT_BLOB ** context, |
| uint8_t * buffer, size_t * size) |
| { |
| LOG_TRACE("called for context-pointer %p, buffer %p and size-pointer %p", |
| context, buffer, size); |
| if (context == NULL || *context == NULL || buffer == NULL || size == NULL) { |
| LOG_ERROR("Null-Pointer passed"); |
| return TSS2_SYS_RC_BAD_REFERENCE; |
| } |
| IESYS_CRYPTOGCRY_CONTEXT *mycontext = * context; |
| if (mycontext->type != IESYS_CRYPTOGCRY_TYPE_HASH) { |
| LOG_ERROR("bad context"); |
| return TSS2_SYS_RC_BAD_REFERENCE; |
| } |
| |
| if (*size < mycontext->hash.hash_len) { |
| LOG_ERROR("Buffer too small"); |
| return TSS2_SYS_RC_BAD_REFERENCE; |
| } |
| |
| uint8_t *cpHash = gcry_md_read(mycontext->hash.gcry_context, |
| mycontext->hash.gcry_hash_alg); |
| if (cpHash == NULL) { |
| LOG_ERROR("GCry error."); |
| return TSS2_SYS_RC_GENERAL_FAILURE; |
| } |
| |
| LOGBLOB_TRACE(cpHash, mycontext->hash.hash_len, "read hash result"); |
| |
| *size = mycontext->hash.hash_len; |
| memmove(buffer, cpHash, *size); |
| |
| gcry_md_close(mycontext->hash.gcry_context); |
| |
| free(mycontext); |
| *context = NULL; |
| |
| return TSS2_RC_SUCCESS; |
| } |
| |
| TSS2_RC |
| iesys_cryptogcry_hash_finish2b(IESYS_CRYPTO_CONTEXT_BLOB ** context, TPM2B * b) |
| { |
| LOG_TRACE("called for context-pointer %p and 2b-pointer %p", context, b); |
| if (context == NULL || *context == NULL || b == NULL) { |
| LOG_ERROR("Null-Pointer passed"); |
| return TSS2_SYS_RC_BAD_REFERENCE; |
| } |
| size_t s = b->size; |
| TSS2_RC ret = iesys_cryptogcry_hash_finish(context, &b->buffer[0], &s); |
| b->size = s; |
| return ret; |
| } |
| |
| void |
| iesys_cryptogcry_hash_abort(IESYS_CRYPTO_CONTEXT_BLOB ** context) |
| { |
| LOG_TRACE("called for context-pointer %p", context); |
| if (context == NULL || *context == NULL) { |
| LOG_DEBUG("Null-Pointer passed"); |
| return; |
| } |
| IESYS_CRYPTOGCRY_CONTEXT *mycontext = |
| (IESYS_CRYPTOGCRY_CONTEXT *) * context; |
| if (mycontext->type != IESYS_CRYPTOGCRY_TYPE_HASH) { |
| LOG_DEBUG("bad context"); |
| return; |
| } |
| |
| gcry_md_close(mycontext->hash.gcry_context); |
| free(mycontext); |
| *context = NULL; |
| } |
| |
| /* HMAC */ |
| |
| TSS2_RC |
| iesys_cryptogcry_hmac_start(IESYS_CRYPTO_CONTEXT_BLOB ** context, |
| TPM2_ALG_ID hmacAlg, |
| const uint8_t * key, size_t size) |
| { |
| TSS2_RC r; |
| |
| LOG_TRACE("called for context-pointer %p and hmacAlg %d", context, hmacAlg); |
| LOGBLOB_TRACE(key, size, "Starting hmac with"); |
| if (context == NULL || key == NULL) { |
| LOG_ERROR("Null-Pointer passed in for context"); |
| return TSS2_SYS_RC_BAD_REFERENCE; |
| } |
| IESYS_CRYPTOGCRY_CONTEXT *mycontext = |
| calloc(1, sizeof(IESYS_CRYPTOGCRY_CONTEXT)); |
| if (mycontext == NULL) { |
| LOG_ERROR("Out of Memory"); |
| return TSS2_SYS_RC_GENERAL_FAILURE; |
| } |
| |
| switch (hmacAlg) { |
| case TPM2_ALG_SHA1: |
| mycontext->hmac.gcry_hmac_alg = GCRY_MAC_HMAC_SHA1; |
| break; |
| case TPM2_ALG_SHA256: |
| mycontext->hmac.gcry_hmac_alg = GCRY_MAC_HMAC_SHA256; |
| break; |
| default: |
| LOG_ERROR("Unsupported hmac algo."); |
| free(mycontext); |
| return TSS2_SYS_RC_GENERAL_FAILURE; |
| } |
| |
| int hmac_len = gcry_mac_get_algo_maclen(mycontext->hmac.gcry_hmac_alg); |
| if (hmac_len <= 0) { |
| LOG_ERROR("GCry error."); |
| free(mycontext); |
| return TSS2_SYS_RC_GENERAL_FAILURE; |
| } |
| |
| mycontext->type = IESYS_CRYPTOGCRY_TYPE_HMAC; |
| mycontext->hmac.hmac_len = hmac_len; |
| |
| r = gcry_mac_open(&mycontext->hmac.gcry_context, |
| mycontext->hmac.gcry_hmac_alg, 0, NULL); |
| if (r != 0) { |
| LOG_ERROR("GCry error."); |
| free(mycontext); |
| return TSS2_SYS_RC_GENERAL_FAILURE; |
| } |
| |
| r = gcry_mac_setkey(mycontext->hmac.gcry_context, key, size); |
| if (r != 0) { |
| LOG_ERROR("GCry error."); |
| gcry_mac_close(mycontext->hmac.gcry_context); |
| free(mycontext); |
| return TSS2_SYS_RC_GENERAL_FAILURE; |
| } |
| |
| *context = (IESYS_CRYPTO_CONTEXT_BLOB *) mycontext; |
| |
| return TSS2_RC_SUCCESS; |
| } |
| |
| TSS2_RC |
| iesys_cryptogcry_hmac_start2b(IESYS_CRYPTO_CONTEXT_BLOB ** context, |
| TPM2_ALG_ID hmacAlg, TPM2B * b) |
| { |
| LOG_TRACE("called for context-pointer %p and 2b-pointer %p", context, b); |
| if (context == NULL || b == NULL) { |
| LOG_ERROR("Null-Pointer passed"); |
| return TSS2_SYS_RC_BAD_REFERENCE; |
| } |
| TSS2_RC ret = iesys_cryptogcry_hmac_start(context, hmacAlg, &b->buffer[0], |
| b->size); |
| return ret; |
| } |
| |
| TSS2_RC |
| iesys_cryptogcry_hmac_update(IESYS_CRYPTO_CONTEXT_BLOB * context, |
| const uint8_t * buffer, size_t size) |
| { |
| LOG_TRACE("called for context %p, buffer %p and size %zd", |
| context, buffer, size); |
| if (context == NULL || buffer == NULL) { |
| LOG_ERROR("Null-Pointer passed"); |
| return TSS2_SYS_RC_BAD_REFERENCE; |
| } |
| IESYS_CRYPTOGCRY_CONTEXT *mycontext = (IESYS_CRYPTOGCRY_CONTEXT *) context; |
| if (mycontext->type != IESYS_CRYPTOGCRY_TYPE_HMAC) { |
| LOG_ERROR("bad context"); |
| return TSS2_SYS_RC_BAD_REFERENCE; |
| } |
| |
| LOGBLOB_TRACE(buffer, size, "Updating hmac with"); |
| |
| gcry_mac_write(mycontext->hmac.gcry_context, buffer, size); |
| |
| return TSS2_RC_SUCCESS; |
| } |
| |
| TSS2_RC |
| iesys_cryptogcry_hmac_update2b(IESYS_CRYPTO_CONTEXT_BLOB * context, TPM2B * b) |
| { |
| LOG_TRACE("called for context-pointer %p and 2b-pointer %p", context, b); |
| if (context == NULL || b == NULL) { |
| LOG_ERROR("Null-Pointer passed"); |
| return TSS2_SYS_RC_BAD_REFERENCE; |
| } |
| TSS2_RC ret = iesys_cryptogcry_hmac_update(context, &b->buffer[0], b->size); |
| return ret; |
| } |
| |
| TSS2_RC |
| iesys_cryptogcry_hmac_finish(IESYS_CRYPTO_CONTEXT_BLOB ** context, |
| uint8_t * buffer, size_t * size) |
| { |
| LOG_TRACE("called for context-pointer %p, buffer %p and size-pointer %p", |
| context, buffer, size); |
| if (context == NULL || *context == NULL || buffer == NULL || size == NULL) { |
| LOG_ERROR("Null-Pointer passed"); |
| return TSS2_SYS_RC_BAD_REFERENCE; |
| } |
| IESYS_CRYPTOGCRY_CONTEXT *mycontext = |
| (IESYS_CRYPTOGCRY_CONTEXT *) * context; |
| if (mycontext->type != IESYS_CRYPTOGCRY_TYPE_HMAC) { |
| LOG_ERROR("bad context"); |
| return TSS2_SYS_RC_BAD_REFERENCE; |
| } |
| |
| if (*size < mycontext->hmac.hmac_len) { |
| LOG_ERROR("Buffer too small"); |
| return TSS2_SYS_RC_BAD_SIZE; |
| } |
| |
| TSS2_RC r = gcry_mac_read(mycontext->hmac.gcry_context, buffer, size); |
| if (r != 0) { |
| LOG_ERROR("GCry error."); |
| return TSS2_SYS_RC_GENERAL_FAILURE; |
| } |
| |
| LOGBLOB_TRACE(buffer, *size, "read hmac result"); |
| |
| gcry_mac_close(mycontext->hmac.gcry_context); |
| |
| free(mycontext); |
| *context = NULL; |
| |
| return TSS2_RC_SUCCESS; |
| } |
| |
| TSS2_RC |
| iesys_cryptogcry_hmac_finish2b(IESYS_CRYPTO_CONTEXT_BLOB ** context, TPM2B * b) |
| { |
| LOG_TRACE("called for context-pointer %p and 2b-pointer %p", context, b); |
| if (context == NULL || *context == NULL || b == NULL) { |
| LOG_ERROR("Null-Pointer passed"); |
| return TSS2_SYS_RC_BAD_REFERENCE; |
| } |
| size_t s = b->size; |
| TSS2_RC ret = iesys_cryptogcry_hmac_finish(context, &b->buffer[0], &s); |
| b->size = s; |
| return ret; |
| } |
| |
| void |
| iesys_cryptogcry_hmac_abort(IESYS_CRYPTO_CONTEXT_BLOB ** context) |
| { |
| LOG_TRACE("called for context-pointer %p", context); |
| if (context == NULL || *context == NULL) { |
| LOG_DEBUG("Null-Pointer passed"); |
| return; |
| } |
| if (*context != NULL) { |
| IESYS_CRYPTOGCRY_CONTEXT *mycontext = |
| (IESYS_CRYPTOGCRY_CONTEXT *) * context; |
| if (mycontext->type != IESYS_CRYPTOGCRY_TYPE_HMAC) { |
| LOG_DEBUG("bad context"); |
| return; |
| } |
| |
| gcry_mac_close(mycontext->hmac.gcry_context); |
| |
| free(mycontext); |
| *context = NULL; |
| } |
| } |
| |
| TSS2_RC |
| iesys_crypto_pHash(TPM2_ALG_ID alg, |
| const uint8_t rcBuffer[4], |
| const uint8_t ccBuffer[4], |
| const TPM2B_NAME * name1, |
| const TPM2B_NAME * name2, |
| const TPM2B_NAME * name3, |
| const uint8_t * pBuffer, |
| size_t pBuffer_size, uint8_t * pHash, size_t * pHash_size) |
| { |
| LOG_TRACE("called"); |
| if (ccBuffer == NULL || pBuffer == NULL || pHash == NULL |
| || pHash_size == NULL) { |
| LOG_ERROR("Null-Pointer passed"); |
| return TSS2_SYS_RC_BAD_REFERENCE; |
| } |
| |
| IESYS_CRYPTO_CONTEXT_BLOB *cryptoContext; |
| |
| TSS2_RC r = iesys_crypto_hash_start(&cryptoContext, alg); |
| return_if_error(r, "Error"); |
| |
| if (rcBuffer != NULL) { |
| r = iesys_crypto_hash_update(cryptoContext, &rcBuffer[0], 4); |
| goto_if_error(r, "Error", error); |
| } |
| |
| r = iesys_crypto_hash_update(cryptoContext, &ccBuffer[0], 4); |
| goto_if_error(r, "Error", error); |
| |
| if (name1 != NULL) { |
| r = iesys_crypto_hash_update2b(cryptoContext, (TPM2B *) name1); |
| goto_if_error(r, "Error", error); |
| } |
| |
| if (name2 != NULL) { |
| r = iesys_crypto_hash_update2b(cryptoContext, (TPM2B *) name2); |
| goto_if_error(r, "Error", error); |
| } |
| |
| if (name3 != NULL) { |
| r = iesys_crypto_hash_update2b(cryptoContext, (TPM2B *) name3); |
| goto_if_error(r, "Error", error); |
| } |
| |
| r = iesys_crypto_hash_update(cryptoContext, pBuffer, pBuffer_size); |
| goto_if_error(r, "Error", error); |
| |
| r = iesys_crypto_hash_finish(&cryptoContext, pHash, pHash_size); |
| goto_if_error(r, "Error", error); |
| |
| return r; |
| |
| error: |
| iesys_crypto_hash_abort(&cryptoContext); |
| return r; |
| } |
| |
| TSS2_RC |
| iesys_crypto_authHmac(TPM2_ALG_ID alg, |
| uint8_t * hmacKey, size_t hmacKeySize, |
| const uint8_t * pHash, |
| size_t pHash_size, |
| const TPM2B_NONCE * nonceNewer, |
| const TPM2B_NONCE * nonceOlder, |
| const TPM2B_NONCE * nonceDecrypt, |
| const TPM2B_NONCE * nonceEncrypt, |
| TPMA_SESSION sessionAttributes, TPM2B_AUTH * hmac) |
| { |
| LOG_TRACE("called"); |
| if (hmacKey == NULL || pHash == NULL || nonceNewer == NULL || |
| nonceOlder == NULL || hmac == NULL) { |
| LOG_ERROR("Null-Pointer passed"); |
| return TSS2_SYS_RC_BAD_REFERENCE; |
| } |
| |
| uint8_t sessionAttribs[sizeof(sessionAttributes)]; |
| size_t sessionAttribs_size = 0; |
| |
| IESYS_CRYPTO_CONTEXT_BLOB *cryptoContext; |
| |
| TSS2_RC r = |
| iesys_crypto_hmac_start(&cryptoContext, alg, hmacKey, hmacKeySize); |
| return_if_error(r, "Error"); |
| |
| r = iesys_crypto_hmac_update(cryptoContext, pHash, pHash_size); |
| goto_if_error(r, "Error", error); |
| |
| r = iesys_crypto_hmac_update2b(cryptoContext, (TPM2B *) nonceNewer); |
| goto_if_error(r, "Error", error); |
| |
| r = iesys_crypto_hmac_update2b(cryptoContext, (TPM2B *) nonceOlder); |
| goto_if_error(r, "Error", error); |
| |
| if (nonceDecrypt != NULL) { |
| r = iesys_crypto_hmac_update2b(cryptoContext, (TPM2B *) nonceDecrypt); |
| goto_if_error(r, "Error", error); |
| } |
| |
| if (nonceEncrypt != NULL) { |
| r = iesys_crypto_hmac_update2b(cryptoContext, (TPM2B *) nonceEncrypt); |
| goto_if_error(r, "Error", error); |
| } |
| |
| r = Tss2_MU_TPMA_SESSION_Marshal(sessionAttributes, |
| &sessionAttribs[0], |
| sizeof(sessionAttribs), |
| &sessionAttribs_size); |
| goto_if_error(r, "Error", error); |
| |
| r = iesys_crypto_hmac_update(cryptoContext, &sessionAttribs[0], |
| sessionAttribs_size); |
| goto_if_error(r, "Error", error); |
| |
| r = iesys_crypto_hmac_finish2b(&cryptoContext, (TPM2B *) hmac); |
| goto_if_error(r, "Error", error); |
| |
| return r; |
| |
| error: |
| iesys_crypto_hmac_abort(&cryptoContext); |
| return r; |
| |
| } |
| |
| TSS2_RC |
| iesys_crypto_KDFaHmac(TPM2_ALG_ID alg, |
| uint8_t * hmacKey, |
| size_t hmacKeySize, |
| uint32_t counter, |
| const char *label, |
| TPM2B_NONCE * contextU, |
| TPM2B_NONCE * contextV, |
| uint32_t bitlength, uint8_t * hmac, size_t * hmacSize) |
| { |
| LOG_TRACE("called"); |
| if (hmacKey == NULL || contextU == NULL || contextV == NULL) { |
| LOG_ERROR("Null-Pointer passed"); |
| return TSS2_SYS_RC_BAD_REFERENCE; |
| } |
| |
| uint8_t buffer32[sizeof(uint32_t)]; |
| size_t buffer32_size = 0; |
| |
| IESYS_CRYPTO_CONTEXT_BLOB *cryptoContext; |
| |
| TSS2_RC r = |
| iesys_crypto_hmac_start(&cryptoContext, alg, hmacKey, hmacKeySize); |
| return_if_error(r, "Error"); |
| |
| r = Tss2_MU_UINT32_Marshal(counter, &buffer32[0], sizeof(UINT32), |
| &buffer32_size); |
| goto_if_error(r, "Marshalling", error); |
| r = iesys_crypto_hmac_update(cryptoContext, &buffer32[0], buffer32_size); |
| goto_if_error(r, "HMAC-Update", error); |
| |
| if (label != NULL) { |
| size_t lsize = strlen(label) + 1; |
| r = iesys_crypto_hmac_update(cryptoContext, (uint8_t *) label, lsize); |
| goto_if_error(r, "Error", error); |
| } |
| |
| r = iesys_crypto_hmac_update2b(cryptoContext, (TPM2B *) contextU); |
| goto_if_error(r, "Error", error); |
| |
| r = iesys_crypto_hmac_update2b(cryptoContext, (TPM2B *) contextV); |
| goto_if_error(r, "Error", error); |
| |
| buffer32_size = 0; |
| r = Tss2_MU_UINT32_Marshal(bitlength, &buffer32[0], sizeof(UINT32), |
| &buffer32_size); |
| goto_if_error(r, "Marshalling", error); |
| r = iesys_crypto_hmac_update(cryptoContext, &buffer32[0], buffer32_size); |
| goto_if_error(r, "Error", error); |
| |
| r = iesys_crypto_hmac_finish(&cryptoContext, hmac, hmacSize); |
| goto_if_error(r, "Error", error); |
| |
| return r; |
| |
| error: |
| iesys_crypto_hmac_abort(&cryptoContext); |
| return r; |
| } |
| |
| TSS2_RC |
| iesys_crypto_KDFa(TPM2_ALG_ID hashAlg, |
| uint8_t * hmacKey, |
| size_t hmacKeySize, |
| const char *label, |
| TPM2B_NONCE * contextU, |
| TPM2B_NONCE * contextV, |
| uint32_t bitLength, uint32_t * counterInOut, BYTE * outKey) |
| { |
| LOG_DEBUG("IESYS KDFa hmac key hashAlg: %i label: %s bitLength: %i", |
| hashAlg, label, bitLength); |
| if (counterInOut != NULL) |
| LOG_TRACE("IESYS KDFa hmac key counterInOut: %i", *counterInOut); |
| LOGBLOB_DEBUG(hmacKey, hmacKeySize, "IESYS KDFa hmac key"); |
| |
| LOGBLOB_DEBUG(&contextU->buffer[0], contextU->size, |
| "IESYS KDFa contextU key"); |
| LOGBLOB_DEBUG(&contextV->buffer[0], contextV->size, |
| "IESYS KDFa contextV key"); |
| BYTE *subKey = outKey; |
| UINT32 counter = 0; |
| INT32 bytes = 0; |
| size_t hlen = 0; |
| TSS2_RC r = iesys_crypto_hash_get_digest_size(hashAlg, &hlen); |
| return_if_error(r, "Error"); |
| if (counterInOut != NULL) |
| counter = *counterInOut; |
| bytes = (bitLength + 7) / 8; |
| LOG_DEBUG("IESYS KDFa hmac key bytes: %i", bytes); |
| for (; bytes > 0; subKey = &subKey[hlen], bytes = bytes - hlen) { |
| LOG_TRACE("IESYS KDFa hmac key bytes: %i", bytes); |
| //if(bytes < (INT32)hlen) |
| // hlen = bytes; |
| counter++; |
| r = iesys_crypto_KDFaHmac(hashAlg, hmacKey, |
| hmacKeySize, counter, label, contextU, |
| contextV, bitLength, &subKey[0], &hlen); |
| return_if_error(r, "Error"); |
| } |
| if ((bitLength % 8) != 0) |
| outKey[0] &= ((1 << (bitLength % 8)) - 1); |
| if (counterInOut != NULL) |
| *counterInOut = counter; |
| LOGBLOB_DEBUG(outKey, (bitLength + 7) / 8, "IESYS KDFa key"); |
| return TPM2_RC_SUCCESS; |
| } |
| |
| TSS2_RC |
| iesys_cryptogcry_random2b(TPM2B_NONCE * nonce, size_t num_bytes) |
| { |
| if (num_bytes == 0) { |
| nonce->size = sizeof(TPMU_HA); |
| } else { |
| nonce->size = num_bytes; |
| } |
| /* |
| * possible values for random level: |
| * GCRY_WEAK_RANDOM GCRY_STRONG_RANDOM GCRY_VERY_STRONG_RANDOM |
| */ |
| gcry_randomize(&nonce->buffer[0], nonce->size, GCRY_STRONG_RANDOM); |
| return TSS2_RC_SUCCESS; |
| } |
| |
| TSS2_RC |
| iesys_cryptogcry_pk_encrypt(TPM2B_PUBLIC * key, |
| size_t in_size, |
| BYTE * in_buffer, |
| size_t max_out_size, |
| BYTE * out_buffer, |
| size_t * out_size, const char *label) |
| { |
| TSS2_RC r; |
| gcry_mpi_t mpi_data; |
| gcry_error_t err; |
| char *hash_alg; |
| size_t lsize = 0; |
| BYTE exponent[4] = { 0x00, 0x01, 0x00, 0x01 }; |
| //gcry_mpi_t mpi_exp; |
| char *padding; |
| char *curveId; |
| gcry_sexp_t sexp_data, sexp_key, sexp_cipher, sexp_cipher_a; |
| if (label != NULL) |
| lsize = strlen(label) + 1; |
| switch (key->publicArea.nameAlg) { |
| case TPM2_ALG_SHA1: |
| hash_alg = "sha1"; |
| break; |
| case TPM2_ALG_SHA256: |
| hash_alg = "sha256"; |
| break; |
| default: |
| LOG_ERROR("Hash alg not implemented"); |
| return TSS2_SYS_RC_BAD_VALUE; |
| } |
| switch (key->publicArea.type) { |
| case TPM2_ALG_RSA: |
| switch (key->publicArea.parameters.rsaDetail.scheme.scheme) { |
| case TPM2_ALG_NULL: |
| padding = "raw"; |
| break; |
| case TPM2_ALG_RSAES: |
| padding = "pkcs1"; |
| break; |
| case TPM2_ALG_OAEP: |
| padding = "oaep"; |
| break; |
| default: |
| LOG_ERROR("Illegal RSA scheme"); |
| return TSS2_SYS_RC_BAD_VALUE; |
| } |
| size_t offset = 0; |
| r = Tss2_MU_UINT32_Marshal(key->publicArea.parameters.rsaDetail.exponent, |
| &exponent[0], sizeof(UINT32), &offset); |
| if (r != TSS2_RC_SUCCESS) { |
| LOG_ERROR("Marshalling"); |
| return r; |
| } |
| err = gcry_sexp_build(&sexp_data, NULL, |
| "(data (flags %s) (hash-algo %s) (label %b) (value %b) )", |
| padding, hash_alg, lsize, label, (int)in_size, |
| in_buffer); |
| if (err != GPG_ERR_NO_ERROR) { |
| LOG_ERROR("Function gcry_sexp_build"); |
| return TSS2_SYS_RC_GENERAL_FAILURE; |
| } |
| err = |
| gcry_sexp_build(&sexp_key, NULL, "(public-key (rsa (n %b) (e %b)))", |
| (int)key->publicArea.unique.rsa.size, |
| &key->publicArea.unique.rsa.buffer[0], 4, exponent); |
| if (err != GPG_ERR_NO_ERROR) { |
| LOG_ERROR("Function gcry_sexp_build"); |
| return TSS2_SYS_RC_GENERAL_FAILURE; |
| } |
| break; |
| case TPM2_ALG_ECC: |
| switch (key->publicArea.parameters.eccDetail.curveID) { |
| case TPM2_ECC_NIST_P192: |
| curveId = "nistp192"; |
| break; |
| case TPM2_ECC_NIST_P224: |
| curveId = "nistp224"; |
| break; |
| case TPM2_ECC_NIST_P256: |
| curveId = "nistp265"; |
| break; |
| case TPM2_ECC_NIST_P384: |
| curveId = "nistp384"; |
| break; |
| case TPM2_ECC_NIST_P521: |
| curveId = "nistp521"; |
| break; |
| default: |
| LOG_ERROR("Illegal ECC curve ID"); |
| return TSS2_SYS_RC_BAD_VALUE; |
| } |
| gcry_mpi_point_t mpi_q = gcry_mpi_point_new(0); |
| gcry_mpi_t mpi_x, mpi_y; |
| err = gcry_mpi_scan(&mpi_x, GCRYMPI_FMT_USG, |
| &key->publicArea.unique.ecc.x.buffer[0], |
| key->publicArea.unique.ecc.x.size, NULL); |
| if (err != GPG_ERR_NO_ERROR) { |
| LOG_ERROR("Function gcry_mpi_scan"); |
| return TSS2_SYS_RC_GENERAL_FAILURE; |
| } |
| err = gcry_mpi_scan(&mpi_y, GCRYMPI_FMT_USG, |
| &key->publicArea.unique.ecc.y.buffer[0], |
| key->publicArea.unique.ecc.y.size, NULL); |
| if (err != GPG_ERR_NO_ERROR) { |
| LOG_ERROR("Function gcry_mpi_scan"); |
| return TSS2_SYS_RC_GENERAL_FAILURE; |
| } |
| gcry_mpi_point_get(mpi_x, mpi_y, NULL, mpi_q); |
| err = |
| gcry_mpi_scan(&mpi_data, GCRYMPI_FMT_USG, in_buffer, in_size, NULL); |
| if (err != GPG_ERR_NO_ERROR) { |
| LOG_ERROR("Function gcry_mpi_scan"); |
| return TSS2_SYS_RC_GENERAL_FAILURE; |
| } |
| err = gcry_sexp_build(&sexp_data, NULL, "(data (value %m))", mpi_data); |
| if (err != GPG_ERR_NO_ERROR) { |
| LOG_ERROR("Function gcry_sexp_build"); |
| return TSS2_SYS_RC_GENERAL_FAILURE; |
| } |
| err = gcry_sexp_build(&sexp_key, NULL, |
| "(public-key (ecc (curve %s) (e %m)))", curveId, |
| mpi_q); |
| if (err != GPG_ERR_NO_ERROR) { |
| LOG_ERROR("Function gcry_sexp_build"); |
| return TSS2_SYS_RC_GENERAL_FAILURE; |
| } |
| break; |
| default: |
| LOG_ERROR("Not implemented"); |
| return TSS2_SYS_RC_GENERAL_FAILURE; |
| } |
| err = gcry_pk_encrypt(&sexp_cipher, sexp_data, sexp_key); |
| if (err != GPG_ERR_NO_ERROR) { |
| LOG_ERROR("Function gcry_pk_encrypt"); |
| return TSS2_SYS_RC_GENERAL_FAILURE; |
| } |
| sexp_cipher_a = gcry_sexp_find_token(sexp_cipher, "a", 0); |
| gcry_mpi_t mpi_cipher = |
| gcry_sexp_nth_mpi(sexp_cipher_a, 1, GCRYMPI_FMT_USG); |
| size_t alen; |
| const void *a; |
| a = gcry_sexp_nth_data(sexp_cipher_a, 1, &alen); |
| (void)a; |
| (void)alen; |
| err = gcry_mpi_print(GCRYMPI_FMT_USG, &out_buffer[0], max_out_size, |
| out_size, mpi_cipher); |
| if (err != GPG_ERR_NO_ERROR) { |
| LOG_ERROR("Function gcry_mpi_print"); |
| return TSS2_SYS_RC_GENERAL_FAILURE; |
| } |
| free(sexp_data); |
| free(sexp_key); |
| free(sexp_cipher); |
| free(sexp_cipher_a); |
| return TSS2_RC_SUCCESS; |
| } |
| |
| TSS2_RC |
| iesys_cryptogcry_pk_decrypt(TPM2B_PUBLIC * key, |
| size_t in_size, BYTE * in_buffer, |
| size_t max_out_size, |
| BYTE * out_buffer, |
| size_t * out_size, const char *label) |
| { |
| gcry_mpi_t mpi_data; |
| gcry_error_t err; |
| // char *hash_alg; |
| // size_t lsize = 0; |
| BYTE exponent[4] = { 0x00, 0x01, 0x00, 0x01 }; |
| //gcry_mpi_t mpi_exp; |
| char *padding; |
| char *curveId; |
| gcry_sexp_t sexp_data, sexp_key, sexp_cipher, sexp_data_value; |
| //if (label != NULL) |
| // lsize = strlen(label) + 1; |
| switch (key->publicArea.nameAlg) { |
| case TPM2_ALG_SHA1: |
| // hash_alg = "sha1"; |
| break; |
| case TPM2_ALG_SHA256: |
| // hash_alg = "sha256"; |
| break; |
| default: |
| LOG_ERROR("Hash alg not implemented"); |
| return TSS2_SYS_RC_BAD_VALUE; |
| } |
| switch (key->publicArea.type) { |
| case TPM2_ALG_RSA: |
| switch (key->publicArea.parameters.rsaDetail.scheme.scheme) { |
| case TPM2_ALG_NULL: |
| padding = "raw"; |
| break; |
| case TPM2_ALG_RSAES: |
| padding = "pkcs1"; |
| break; |
| case TPM2_ALG_OAEP: |
| padding = "oaep"; |
| break; |
| default: |
| LOG_ERROR("Illegal RSA scheme"); |
| return TSS2_SYS_RC_BAD_VALUE; |
| } |
| err = |
| gcry_sexp_build(&sexp_cipher, NULL, |
| "(enc-val (flags %s) (rsa (a %b))", padding, |
| (int)in_size, in_buffer); |
| if (err != GPG_ERR_NO_ERROR) { |
| LOG_ERROR("Function gcry_sexp_build"); |
| return TSS2_SYS_RC_GENERAL_FAILURE; |
| } |
| err = |
| gcry_sexp_build(&sexp_key, NULL, "(public-key (rsa (n %b) (e %b)))", |
| (int)key->publicArea.unique.rsa.size, |
| &key->publicArea.unique.rsa.buffer[0], 4, exponent); |
| if (err != GPG_ERR_NO_ERROR) { |
| LOG_ERROR("Function gcry_sexp_build"); |
| return TSS2_SYS_RC_GENERAL_FAILURE; |
| } |
| break; |
| case TPM2_ALG_ECC: |
| switch (key->publicArea.parameters.eccDetail.curveID) { |
| case TPM2_ECC_NIST_P192: |
| curveId = "nistp192"; |
| break; |
| case TPM2_ECC_NIST_P224: |
| curveId = "nistp224"; |
| break; |
| case TPM2_ECC_NIST_P256: |
| curveId = "nistp265"; |
| break; |
| case TPM2_ECC_NIST_P384: |
| curveId = "nistp384"; |
| break; |
| case TPM2_ECC_NIST_P521: |
| curveId = "nistp521"; |
| break; |
| default: |
| LOG_ERROR("Illegal ECC curve ID"); |
| return TSS2_SYS_RC_BAD_VALUE; |
| } |
| gcry_mpi_point_t mpi_q = gcry_mpi_point_new(0); |
| gcry_mpi_t mpi_x, mpi_y; |
| err = gcry_mpi_scan(&mpi_x, GCRYMPI_FMT_USG, |
| &key->publicArea.unique.ecc.x.buffer[0], |
| key->publicArea.unique.ecc.x.size, NULL); |
| if (err != GPG_ERR_NO_ERROR) { |
| LOG_ERROR("Function gcry_mpi_scan"); |
| return TSS2_SYS_RC_GENERAL_FAILURE; |
| } |
| err = gcry_mpi_scan(&mpi_y, GCRYMPI_FMT_USG, |
| &key->publicArea.unique.ecc.y.buffer[0], |
| key->publicArea.unique.ecc.y.size, NULL); |
| if (err != GPG_ERR_NO_ERROR) { |
| LOG_ERROR("Function gcry_mpi_scan"); |
| return TSS2_SYS_RC_GENERAL_FAILURE; |
| } |
| gcry_mpi_point_get(mpi_x, mpi_y, NULL, mpi_q); |
| err = |
| gcry_mpi_scan(&mpi_data, GCRYMPI_FMT_USG, in_buffer, in_size, NULL); |
| if (err != GPG_ERR_NO_ERROR) { |
| LOG_ERROR("Function gcry_mpi_scan"); |
| return TSS2_SYS_RC_GENERAL_FAILURE; |
| } |
| err = |
| gcry_sexp_build(&sexp_cipher, NULL, "(enc-val (ecc (a %m)))", |
| mpi_data); |
| if (err != GPG_ERR_NO_ERROR) { |
| LOG_ERROR("Function gcry_sexp_build"); |
| return TSS2_SYS_RC_GENERAL_FAILURE; |
| } |
| err = gcry_sexp_build(&sexp_key, NULL, |
| "(public-key (ecc (curve %s) (e %m)))", curveId, |
| mpi_q); |
| if (err != GPG_ERR_NO_ERROR) { |
| LOG_ERROR("Function gcry_sexp_build"); |
| return TSS2_SYS_RC_GENERAL_FAILURE; |
| } |
| break; |
| default: |
| LOG_ERROR("Not implemented"); |
| return TSS2_SYS_RC_GENERAL_FAILURE; |
| } |
| err = gcry_pk_decrypt(&sexp_data, sexp_cipher, sexp_key); |
| if (err != GPG_ERR_NO_ERROR) { |
| LOG_ERROR("Function gcry_pk_decrypt"); |
| return TSS2_SYS_RC_GENERAL_FAILURE; |
| } |
| sexp_data_value = gcry_sexp_find_token(sexp_data, "value", 0); |
| if (err != GPG_ERR_NO_ERROR) { |
| LOG_ERROR("Function gcry_sexp_find_token"); |
| return TSS2_SYS_RC_GENERAL_FAILURE; |
| } |
| mpi_data = gcry_sexp_nth_mpi(sexp_data_value, 1, GCRYMPI_FMT_USG); |
| size_t vlen; |
| const void *v; |
| v = gcry_sexp_nth_data(sexp_data_value, 1, &vlen); |
| (void)v; |
| (void)vlen; |
| err = |
| gcry_mpi_print(GCRYMPI_FMT_USG, &out_buffer[0], max_out_size, out_size, |
| mpi_data); |
| if (err != GPG_ERR_NO_ERROR) { |
| LOG_ERROR("Function gcry_mpi_print"); |
| return TSS2_SYS_RC_GENERAL_FAILURE; |
| } |
| free(sexp_data); |
| free(sexp_key); |
| free(sexp_cipher); |
| free(sexp_data_value); |
| return TSS2_RC_SUCCESS; |
| } |
| |
| TSS2_RC |
| iesys_cryptogcry_sym_aes_init(gcry_cipher_hd_t * cipher_hd, |
| uint8_t * key, |
| TPM2_ALG_ID tpm_sym_alg, |
| TPMI_AES_KEY_BITS key_bits, |
| TPM2_ALG_ID tpm_mode, |
| size_t blk_len, size_t iv_len, uint8_t * iv) |
| { |
| |
| LOGBLOB_TRACE(key, (key_bits + 7) / 8, "IESYS AES key"); |
| LOGBLOB_TRACE(iv, iv_len, "IESYS AES iv"); |
| int algo, mode, len; |
| //int blk_len = 16; |
| size_t key_len = 0; |
| gcry_error_t err; |
| switch (tpm_sym_alg) { |
| case TPM2_ALG_AES: |
| switch (key_bits) { |
| case 128: |
| algo = GCRY_CIPHER_AES128; |
| len = 128; |
| break; |
| case 192: |
| algo = GCRY_CIPHER_AES192; |
| len = 192; |
| break; |
| case 256: |
| algo = GCRY_CIPHER_AES256; |
| len = 256; |
| break; |
| default: |
| LOG_ERROR("Illegal key length."); |
| return TSS2_SYS_RC_BAD_VALUE; |
| } |
| switch (tpm_mode) { |
| case TPM2_ALG_CBC: |
| mode = GCRY_CIPHER_MODE_CBC; |
| break; |
| case TPM2_ALG_CFB: |
| mode = GCRY_CIPHER_MODE_CFB; |
| break; |
| default: |
| LOG_ERROR("Illegal symmetric algorithm."); |
| return TSS2_SYS_RC_BAD_VALUE; |
| } |
| break; |
| default: |
| LOG_ERROR("Illegal symmetric algorithm."); |
| return TSS2_SYS_RC_BAD_VALUE; |
| } |
| key_len = (len + 7) / 8; |
| err = gcry_cipher_open(cipher_hd, algo, mode, 0); |
| if (err != GPG_ERR_NO_ERROR) { |
| LOG_ERROR("Opening gcrypt context"); |
| return TSS2_SYS_RC_GENERAL_FAILURE; |
| } |
| if (iv_len != 0) { |
| err = gcry_cipher_setiv(*cipher_hd, &iv[0], blk_len); |
| if (err != GPG_ERR_NO_ERROR) { |
| LOG_ERROR("Function gcry_cipher_setiv"); |
| return TSS2_SYS_RC_GENERAL_FAILURE; |
| } |
| } |
| err = gcry_cipher_setkey(*cipher_hd, key, key_len); |
| if (err != GPG_ERR_NO_ERROR) { |
| LOG_ERROR("Function gcry_cipher_setkey"); |
| return TSS2_SYS_RC_GENERAL_FAILURE; |
| } |
| return TSS2_RC_SUCCESS; |
| } |
| |
| TSS2_RC |
| iesys_cryptogcry_sym_aes_encrypt(uint8_t * key, |
| TPM2_ALG_ID tpm_sym_alg, |
| TPMI_AES_KEY_BITS key_bits, |
| TPM2_ALG_ID tpm_mode, |
| size_t blk_len, |
| uint8_t * buffer, |
| size_t buffer_size, |
| uint8_t * iv, size_t iv_len) |
| { |
| gcry_cipher_hd_t cipher_hd; |
| //int blk_len = 16; |
| gcry_error_t err; |
| TSS2_RC r; |
| r = iesys_cryptogcry_sym_aes_init(&cipher_hd, key, tpm_sym_alg, |
| key_bits, tpm_mode, blk_len, iv_len, iv); |
| if (r != TSS2_RC_SUCCESS) |
| return r; |
| LOGBLOB_TRACE(buffer, buffer_size, "IESYS AES input"); |
| err = gcry_cipher_encrypt(cipher_hd, buffer, buffer_size, NULL, 0); |
| LOGBLOB_TRACE(buffer, buffer_size, "IESYS AES output"); |
| if (err != GPG_ERR_NO_ERROR) { |
| LOG_ERROR("Function gcry_cipher_encrypt"); |
| return TSS2_SYS_RC_GENERAL_FAILURE; |
| } |
| gcry_cipher_close(cipher_hd); |
| return TSS2_RC_SUCCESS; |
| } |
| |
| TSS2_RC |
| iesys_cryptogcry_sym_aes_decrypt(uint8_t * key, |
| TPM2_ALG_ID tpm_sym_alg, |
| TPMI_AES_KEY_BITS key_bits, |
| TPM2_ALG_ID tpm_mode, |
| size_t blk_len, |
| uint8_t * buffer, size_t buffer_size, |
| uint8_t * iv, size_t iv_len) |
| { |
| gcry_cipher_hd_t cipher_hd; |
| //int blk_len = 16; |
| gcry_error_t err; |
| TSS2_RC r; |
| r = iesys_cryptogcry_sym_aes_init(&cipher_hd, key, tpm_sym_alg, |
| key_bits, tpm_mode, blk_len, iv_len, iv); |
| if (r != TSS2_RC_SUCCESS) |
| return r; |
| err = gcry_cipher_decrypt(cipher_hd, buffer, buffer_size, NULL, 0); |
| if (err != GPG_ERR_NO_ERROR) { |
| LOG_ERROR("Function gcry_cipher_decrypt"); |
| return TSS2_SYS_RC_GENERAL_FAILURE; |
| } |
| gcry_cipher_close(cipher_hd); |
| return TSS2_RC_SUCCESS; |
| } |
