/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. * * 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 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * "This product includes cryptographic software written by * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``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 AUTHOR 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. * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence * [including the GNU Public Licence.] */ #ifndef OPENSSL_HEADER_CIPHER_INTERNAL_H #define OPENSSL_HEADER_CIPHER_INTERNAL_H #include <openssl/base.h> #include <openssl/aead.h> #include <openssl/aes.h> #include "../../internal.h" #include "../modes/internal.h" #if defined(__cplusplus) extern "C" { #endif // EVP_CIPH_MODE_MASK contains the bits of |flags| that represent the mode. #define EVP_CIPH_MODE_MASK 0x3f // EVP_AEAD represents a specific AEAD algorithm. struct evp_aead_st { uint8_t key_len; uint8_t nonce_len; uint8_t overhead; uint8_t max_tag_len; int seal_scatter_supports_extra_in; // init initialises an |EVP_AEAD_CTX|. If this call returns zero then // |cleanup| will not be called for that context. int (*init)(EVP_AEAD_CTX *, const uint8_t *key, size_t key_len, size_t tag_len); int (*init_with_direction)(EVP_AEAD_CTX *, const uint8_t *key, size_t key_len, size_t tag_len, enum evp_aead_direction_t dir); void (*cleanup)(EVP_AEAD_CTX *); int (*open)(const EVP_AEAD_CTX *ctx, uint8_t *out, size_t *out_len, size_t max_out_len, const uint8_t *nonce, size_t nonce_len, const uint8_t *in, size_t in_len, const uint8_t *ad, size_t ad_len); int (*seal_scatter)(const EVP_AEAD_CTX *ctx, uint8_t *out, uint8_t *out_tag, size_t *out_tag_len, size_t max_out_tag_len, const uint8_t *nonce, size_t nonce_len, const uint8_t *in, size_t in_len, const uint8_t *extra_in, size_t extra_in_len, const uint8_t *ad, size_t ad_len); int (*open_gather)(const EVP_AEAD_CTX *ctx, uint8_t *out, const uint8_t *nonce, size_t nonce_len, const uint8_t *in, size_t in_len, const uint8_t *in_tag, size_t in_tag_len, const uint8_t *ad, size_t ad_len); int (*get_iv)(const EVP_AEAD_CTX *ctx, const uint8_t **out_iv, size_t *out_len); size_t (*tag_len)(const EVP_AEAD_CTX *ctx, size_t in_Len, size_t extra_in_len); }; // aes_ctr_set_key initialises |*aes_key| using |key_bytes| bytes from |key|, // where |key_bytes| must either be 16, 24 or 32. If not NULL, |*out_block| is // set to a function that encrypts single blocks. If not NULL, |*gcm_key| is // initialised to do GHASH with the given key. It returns a function for // optimised CTR-mode, or NULL if CTR-mode should be built using |*out_block|. ctr128_f aes_ctr_set_key(AES_KEY *aes_key, GCM128_KEY *gcm_key, block128_f *out_block, const uint8_t *key, size_t key_bytes); #if defined(__cplusplus) } // extern C #endif #endif // OPENSSL_HEADER_CIPHER_INTERNAL_H