218 lines
9.9 KiB
C
218 lines
9.9 KiB
C
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/* ====================================================================
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* Copyright (c) 2008 The OpenSSL Project. All rights reserved.
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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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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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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
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* openssl-core@openssl.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ==================================================================== */
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#ifndef OPENSSL_HEADER_MODES_H
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#define OPENSSL_HEADER_MODES_H
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#include <openssl/base.h>
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#if defined(__cplusplus)
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extern "C" {
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#endif
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/* modes.h contains functions that implement various block-cipher modes. */
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/* block128_f is the type of a 128-bit, block cipher. */
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typedef void (*block128_f)(const uint8_t in[16], uint8_t out[16],
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const void *key);
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/* CTR. */
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/* ctr128_f is the type of a function that performs CTR-mode encryption. */
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typedef void (*ctr128_f)(const uint8_t *in, uint8_t *out, size_t blocks,
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const void *key, const uint8_t ivec[16]);
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/* CRYPTO_ctr128_encrypt encrypts (or decrypts, it's the same in CTR mode)
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* |len| bytes from |in| to |out| using |block| in counter mode. There's no
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* requirement that |len| be a multiple of any value and any partial blocks are
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* stored in |ecount_buf| and |*num|, which must be zeroed before the initial
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* call. The counter is a 128-bit, big-endian value in |ivec| and is
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* incremented by this function. */
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void CRYPTO_ctr128_encrypt(const uint8_t *in, uint8_t *out,
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size_t len, const void *key, uint8_t ivec[16],
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uint8_t ecount_buf[16], unsigned int *num,
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block128_f block);
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/* CRYPTO_ctr128_encrypt_ctr32 acts like |CRYPTO_ctr128_encrypt| but takes
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* |ctr|, a function that performs CTR mode but only deals with the lower 32
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* bits of the counter. This is useful when |ctr| can be an optimised
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* function. */
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void CRYPTO_ctr128_encrypt_ctr32(const uint8_t *in, uint8_t *out,
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size_t len, const void *key,
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uint8_t ivec[16],
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uint8_t ecount_buf[16],
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unsigned int *num, ctr128_f ctr);
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/* GCM. */
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typedef struct gcm128_context GCM128_CONTEXT;
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/* CRYPTO_gcm128_new allocates a fresh |GCM128_CONTEXT| and calls
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* |CRYPTO_gcm128_init|. It returns the new context, or NULL on error. */
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GCM128_CONTEXT *CRYPTO_gcm128_new(void *key, block128_f block);
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/* CRYPTO_gcm128_init initialises |ctx| to use |block| (typically AES) with the
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* given key. */
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void CRYPTO_gcm128_init(GCM128_CONTEXT *ctx, void *key, block128_f block);
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/* CRYPTO_gcm128_setiv sets the IV (nonce) for |ctx|. */
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void CRYPTO_gcm128_setiv(GCM128_CONTEXT *ctx, const uint8_t *iv, size_t len);
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/* CRYPTO_gcm128_aad sets the authenticated data for an instance of GCM. This
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* must be called before and data is encrypted. It returns one on success and
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* zero otherwise. */
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int CRYPTO_gcm128_aad(GCM128_CONTEXT *ctx, const uint8_t *aad, size_t len);
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/* CRYPTO_gcm128_encrypt encrypts |len| bytes from |in| to |out|. It returns
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* one on success and zero otherwise. */
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int CRYPTO_gcm128_encrypt(GCM128_CONTEXT *ctx, const uint8_t *in, uint8_t *out,
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size_t len);
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/* CRYPTO_gcm128_decrypt decrypts |len| bytes from |in| to |out|. It returns
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* one on success and zero otherwise. */
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int CRYPTO_gcm128_decrypt(GCM128_CONTEXT *ctx, const uint8_t *in, uint8_t *out,
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size_t len);
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/* CRYPTO_gcm128_encrypt_ctr32 encrypts |len| bytes from |in| to |out| using a
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* CTR function that only handles the bottom 32 bits of the nonce, like
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* |CRYPTO_ctr128_encrypt_ctr32|. It returns one on success and zero
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* otherwise. */
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int CRYPTO_gcm128_encrypt_ctr32(GCM128_CONTEXT *ctx, const uint8_t *in,
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uint8_t *out, size_t len, ctr128_f stream);
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/* CRYPTO_gcm128_decrypt_ctr32 decrypts |len| bytes from |in| to |out| using a
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* CTR function that only handles the bottom 32 bits of the nonce, like
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* |CRYPTO_ctr128_encrypt_ctr32|. It returns one on success and zero
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* otherwise. */
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int CRYPTO_gcm128_decrypt_ctr32(GCM128_CONTEXT *ctx, const uint8_t *in,
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uint8_t *out, size_t len, ctr128_f stream);
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/* CRYPTO_gcm128_finish calculates the authenticator and compares it against
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* |len| bytes of |tag|. It returns one on success and zero otherwise. */
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int CRYPTO_gcm128_finish(GCM128_CONTEXT *ctx, const uint8_t *tag, size_t len);
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/* CRYPTO_gcm128_tag calculates the authenticator and copies it into |tag|. The
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* minimum of |len| and 16 bytes are copied into |tag|. */
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void CRYPTO_gcm128_tag(GCM128_CONTEXT *ctx, uint8_t *tag, size_t len);
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/* CRYPTO_gcm128_release clears and frees |ctx|. */
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void CRYPTO_gcm128_release(GCM128_CONTEXT *ctx);
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/* CBC. */
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/* cbc128_f is the type of a function that performs CBC-mode encryption. */
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typedef void (*cbc128_f)(const uint8_t *in, uint8_t *out, size_t len,
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const void *key, uint8_t ivec[16], int enc);
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/* CRYPTO_cbc128_encrypt encrypts |len| bytes from |in| to |out| using the
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* given IV and block cipher in CBC mode. The input need not be a multiple of
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* 128 bits long, but the output will round up to the nearest 128 bit multiple,
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* zero padding the input if needed. The IV will be updated on return. */
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void CRYPTO_cbc128_encrypt(const uint8_t *in, uint8_t *out, size_t len,
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const void *key, uint8_t ivec[16], block128_f block);
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/* CRYPTO_cbc128_decrypt decrypts |len| bytes from |in| to |out| using the
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* given IV and block cipher in CBC mode. If |len| is not a multiple of 128
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* bits then only that many bytes will be written, but a multiple of 128 bits
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* is always read from |in|. The IV will be updated on return. */
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void CRYPTO_cbc128_decrypt(const uint8_t *in, uint8_t *out, size_t len,
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const void *key, uint8_t ivec[16], block128_f block);
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/* OFB. */
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/* CRYPTO_ofb128_encrypt encrypts (or decrypts, it's the same with OFB mode)
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* |len| bytes from |in| to |out| using |block| in OFB mode. There's no
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* requirement that |len| be a multiple of any value and any partial blocks are
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* stored in |ivec| and |*num|, the latter must be zero before the initial
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* call. */
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void CRYPTO_ofb128_encrypt(const uint8_t *in, uint8_t *out,
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size_t len, const void *key, uint8_t ivec[16],
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int *num, block128_f block);
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/* CFB. */
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/* CRYPTO_cfb128_encrypt encrypts (or decrypts, if |enc| is zero) |len| bytes
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* from |in| to |out| using |block| in CFB mode. There's no requirement that
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* |len| be a multiple of any value and any partial blocks are stored in |ivec|
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* and |*num|, the latter must be zero before the initial call. */
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void CRYPTO_cfb128_encrypt(const uint8_t *in, uint8_t *out, size_t len,
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const void *key, uint8_t ivec[16], int *num, int enc,
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block128_f block);
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/* CRYPTO_cfb128_8_encrypt encrypts (or decrypts, if |enc| is zero) |len| bytes
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* from |in| to |out| using |block| in CFB-8 mode. Prior to the first call
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* |num| should be set to zero. */
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void CRYPTO_cfb128_8_encrypt(const uint8_t *in, uint8_t *out, size_t len,
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const void *key, uint8_t ivec[16], int *num,
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int enc, block128_f block);
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/* CRYPTO_cfb128_1_encrypt encrypts (or decrypts, if |enc| is zero) |len| bytes
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* from |in| to |out| using |block| in CFB-1 mode. Prior to the first call
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* |num| should be set to zero. */
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void CRYPTO_cfb128_1_encrypt(const uint8_t *in, uint8_t *out, size_t bits,
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const void *key, uint8_t ivec[16], int *num,
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int enc, block128_f block);
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size_t CRYPTO_cts128_encrypt_block(const uint8_t *in, uint8_t *out, size_t len,
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const void *key, uint8_t ivec[16],
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block128_f block);
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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_MODES_H */
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