diff options
Diffstat (limited to 'lib/crypto/c_src/cmac.c')
-rw-r--r-- | lib/crypto/c_src/cmac.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/lib/crypto/c_src/cmac.c b/lib/crypto/c_src/cmac.c new file mode 100644 index 0000000000..a1564f6661 --- /dev/null +++ b/lib/crypto/c_src/cmac.c @@ -0,0 +1,73 @@ +/* + * %CopyrightBegin% + * + * Copyright Ericsson AB 2010-2018. All Rights Reserved. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + * %CopyrightEnd% + */ + +#include "common.h" + +/***************************************************************** + * + * This file has functions for compatibility with cryptolibs + * lacking the EVP_Digest API. + * + * See mac.c for the implementation using the EVP interface. + * + ****************************************************************/ + +#if defined(HAVE_CMAC) && !defined(HAVE_EVP_PKEY_new_CMAC_key) + +#include "cmac.h" + +int cmac_low_level(ErlNifEnv* env, + ErlNifBinary key_bin, const EVP_CIPHER* cipher, ErlNifBinary text, + ErlNifBinary *ret_bin, int *ret_bin_alloc, ERL_NIF_TERM *return_term) +{ + CMAC_CTX *ctx = NULL; + size_t size; + + if ((ctx = CMAC_CTX_new()) == NULL) + goto local_err; + + if (!CMAC_Init(ctx, key_bin.data, key_bin.size, cipher, NULL)) + goto local_err; + + if (!CMAC_Update(ctx, text.data, text.size)) + goto local_err; + + if ((size = (size_t)EVP_CIPHER_block_size(cipher)) < 0) + goto local_err; + + if (!enif_alloc_binary(size, ret_bin)) + goto local_err; + *ret_bin_alloc = 1; + + if (!CMAC_Final(ctx, ret_bin->data, &ret_bin->size)) + goto local_err; + + CMAC_CTX_free(ctx); + return 1; + + local_err: + if (ctx) + CMAC_CTX_free(ctx); + + *return_term = EXCP_ERROR(env,"Compat cmac"); + return 0; +} + +#endif |