54 lines
2.0 KiB
C
54 lines
2.0 KiB
C
/*
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* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The OpenAirInterface Software Alliance licenses this file to You under
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* the OAI Public License, Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.openairinterface.org/?page_id=698
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*-------------------------------------------------------------------------------
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* For more information about the OpenAirInterface (OAI) Software Alliance:
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* contact@openairinterface.org
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*/
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#include "aes_128_ecb.h"
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#include "common/utils/assertions.h"
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#include <openssl/aes.h>
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#include <openssl/err.h>
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#include <openssl/evp.h>
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void aes_128_ecb(const aes_128_t* k_iv, byte_array_t msg, size_t len_out, uint8_t out[len_out])
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{
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DevAssert(k_iv != NULL);
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DevAssert(k_iv->type == NONE_INITIALIZATION_VECTOR);
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// Create and initialise the context
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EVP_CIPHER_CTX* ctx = EVP_CIPHER_CTX_new();
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DevAssert(ctx != NULL);
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// Initialise the encryption operation.
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int rc = EVP_EncryptInit_ex(ctx, EVP_aes_128_ecb(), NULL, k_iv->key, NULL);
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DevAssert(rc == 1);
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int len_ev = 0;
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rc = EVP_EncryptUpdate(ctx, out, &len_ev, msg.buf, msg.len);
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AssertFatal(!(len_ev > len_out), "Buffer overflow");
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// Finalise the encryption. Normally ciphertext bytes may be written at
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// this stage, but this does not occur in GCM mode
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rc = EVP_EncryptFinal_ex(ctx, out + len_ev, &len_ev);
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DevAssert(rc == 1);
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// Get the tag
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// rc == EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_GCM_GET_TAG, 16, tag))
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EVP_CIPHER_CTX_free(ctx);
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}
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