| /* 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; |
| |
| /* 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 *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); |
| }; |
| |
| /* 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_ctx| 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_CONTEXT *gcm_ctx, |
| block128_f *out_block, const uint8_t *key, |
| size_t key_bytes); |
| |
| #if defined(__cplusplus) |
| } /* extern C */ |
| #endif |
| |
| #endif /* OPENSSL_HEADER_CIPHER_INTERNAL_H */ |