38 lines
806 B
C
38 lines
806 B
C
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/* Copyright 2018 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include <openssl/evp.h>
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#define HIDE_EC_STDLIB
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#include "dcrypto.h"
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#include "registers.h"
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int DCRYPTO_aes_ctr(uint8_t *out, const uint8_t *key, uint32_t key_bits,
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const uint8_t *iv, const uint8_t *in, size_t in_len)
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{
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EVP_CIPHER_CTX *ctx;
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int ret = 0;
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int out_len = 0;
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ctx = EVP_CIPHER_CTX_new();
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if (!ctx)
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return 0;
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if (EVP_EncryptInit_ex(ctx, EVP_aes_256_ctr(), NULL, key, iv) != 1)
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goto cleanup;
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if (EVP_EncryptUpdate(ctx, out, &out_len, in, in_len) != 1)
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goto cleanup;
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if (EVP_EncryptFinal(ctx, out + out_len, &out_len) != 1)
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goto cleanup;
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ret = 1;
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cleanup:
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EVP_CIPHER_CTX_free(ctx);
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return ret;
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}
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