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64 lines
2.1 KiB
C
64 lines
2.1 KiB
C
/**
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* (C) 2007-20 - ntop.org and contributors
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not see see <http://www.gnu.org/licenses/>
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*
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*/
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#ifdef N2N_HAVE_AES
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#ifndef AES_H
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#define AES_H
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#include <stdint.h>
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#include <openssl/aes.h>
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#include <openssl/evp.h>
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#include <openssl/err.h>
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#define AES256_KEY_BYTES (256/8)
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#define AES192_KEY_BYTES (192/8)
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#define AES128_KEY_BYTES (128/8)
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typedef struct aes_context_t {
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#ifdef HAVE_OPENSSL_1_1
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EVP_CIPHER_CTX *enc_ctx; /* openssl's reusable evp_* en/de-cryption context */
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EVP_CIPHER_CTX *dec_ctx; /* openssl's reusable evp_* en/de-cryption context */
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const EVP_CIPHER *cipher; /* cipher to use: e.g. EVP_aes_128_cbc */
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uint8_t key[AES256_KEY_BYTES]; /* the pure key data for payload encryption & decryption */
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AES_KEY ecb_dec_key; /* one step ecb decryption key */
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#else
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AES_KEY enc_key; /* tx key */
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AES_KEY dec_key; /* tx key */
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#endif
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} aes_context_t;
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int aes_cbc_encrypt (unsigned char *out, const unsigned char *in, size_t in_len,
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const unsigned char *iv, aes_context_t *ctx);
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int aes_cbc_decrypt (unsigned char *out, const unsigned char *in, size_t in_len,
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const unsigned char *iv, aes_context_t *ctx);
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int aes_ecb_decrypt (unsigned char *out, const unsigned char *in, aes_context_t *ctx);
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int aes_init (const unsigned char *key, size_t key_size, aes_context_t **ctx);
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#endif // AES_H
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#endif // N2N_HAVE_AES
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