74bce29965
Change-Id: I7e2fc8588d799d01d94cb5d94e49b53b367380ab Reviewed-on: https://boringssl-review.googlesource.com/17344 Reviewed-by: Adam Langley <agl@google.com>
127 lines
5.7 KiB
C
127 lines
5.7 KiB
C
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.] */
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#ifndef OPENSSL_HEADER_CIPHER_INTERNAL_H
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#define OPENSSL_HEADER_CIPHER_INTERNAL_H
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#include <openssl/base.h>
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#include <openssl/aead.h>
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#include <openssl/aes.h>
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#include "../../internal.h"
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#include "../modes/internal.h"
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#if defined(__cplusplus)
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extern "C" {
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#endif
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/* EVP_CIPH_MODE_MASK contains the bits of |flags| that represent the mode. */
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#define EVP_CIPH_MODE_MASK 0x3f
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/* EVP_AEAD represents a specific AEAD algorithm. */
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struct evp_aead_st {
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uint8_t key_len;
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uint8_t nonce_len;
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uint8_t overhead;
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uint8_t max_tag_len;
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int seal_scatter_supports_extra_in;
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/* init initialises an |EVP_AEAD_CTX|. If this call returns zero then
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* |cleanup| will not be called for that context. */
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int (*init)(EVP_AEAD_CTX *, const uint8_t *key, size_t key_len,
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size_t tag_len);
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int (*init_with_direction)(EVP_AEAD_CTX *, const uint8_t *key, size_t key_len,
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size_t tag_len, enum evp_aead_direction_t dir);
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void (*cleanup)(EVP_AEAD_CTX *);
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int (*open)(const EVP_AEAD_CTX *ctx, uint8_t *out, size_t *out_len,
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size_t max_out_len, const uint8_t *nonce, size_t nonce_len,
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const uint8_t *in, size_t in_len, const uint8_t *ad,
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size_t ad_len);
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int (*seal_scatter)(const EVP_AEAD_CTX *ctx, uint8_t *out, uint8_t *out_tag,
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size_t *out_tag_len, size_t max_out_tag_len,
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const uint8_t *nonce, size_t nonce_len, const uint8_t *in,
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size_t in_len, const uint8_t *extra_in,
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size_t extra_in_len, const uint8_t *ad, size_t ad_len);
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int (*open_gather)(const EVP_AEAD_CTX *ctx, uint8_t *out,
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const uint8_t *nonce, size_t nonce_len, const uint8_t *in,
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size_t in_len, const uint8_t *in_tag, size_t in_tag_len,
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const uint8_t *ad, size_t ad_len);
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int (*get_iv)(const EVP_AEAD_CTX *ctx, const uint8_t **out_iv,
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size_t *out_len);
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};
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/* aes_ctr_set_key initialises |*aes_key| using |key_bytes| bytes from |key|,
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* where |key_bytes| must either be 16, 24 or 32. If not NULL, |*out_block| is
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* set to a function that encrypts single blocks. If not NULL, |*gcm_ctx| is
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* initialised to do GHASH with the given key. It returns a function for
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* optimised CTR-mode, or NULL if CTR-mode should be built using
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* |*out_block|. */
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ctr128_f aes_ctr_set_key(AES_KEY *aes_key, GCM128_CONTEXT *gcm_ctx,
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block128_f *out_block, const uint8_t *key,
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size_t key_bytes);
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#if defined(__cplusplus)
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} /* extern C */
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#endif
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#endif /* OPENSSL_HEADER_CIPHER_INTERNAL_H */
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