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- /* 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_EXTRA_INTERNAL_H
- #define OPENSSL_HEADER_CIPHER_EXTRA_INTERNAL_H
-
- #include <openssl/base.h>
-
- #include "../internal.h"
-
- #if defined(__cplusplus)
- extern "C" {
- #endif
-
-
- /* EVP_tls_cbc_get_padding determines the padding from the decrypted, TLS, CBC
- * record in |in|. This decrypted record should not include any "decrypted"
- * explicit IV. If the record is publicly invalid, it returns zero. Otherwise,
- * it returns one and sets |*out_padding_ok| to all ones (0xfff..f) if the
- * padding is valid and zero otherwise. It then sets |*out_len| to the length
- * with the padding removed or |in_len| if invalid.
- *
- * If the function returns one, it runs in time independent of the contents of
- * |in|. It is also guaranteed that |*out_len| >= |mac_size|, satisfying
- * |EVP_tls_cbc_copy_mac|'s precondition. */
- int EVP_tls_cbc_remove_padding(crypto_word_t *out_padding_ok, size_t *out_len,
- const uint8_t *in, size_t in_len,
- size_t block_size, size_t mac_size);
-
- /* EVP_tls_cbc_copy_mac copies |md_size| bytes from the end of the first
- * |in_len| bytes of |in| to |out| in constant time (independent of the concrete
- * value of |in_len|, which may vary within a 256-byte window). |in| must point
- * to a buffer of |orig_len| bytes.
- *
- * On entry:
- * orig_len >= in_len >= md_size
- * md_size <= EVP_MAX_MD_SIZE */
- void EVP_tls_cbc_copy_mac(uint8_t *out, size_t md_size, const uint8_t *in,
- size_t in_len, size_t orig_len);
-
- /* EVP_tls_cbc_record_digest_supported returns 1 iff |md| is a hash function
- * which EVP_tls_cbc_digest_record supports. */
- int EVP_tls_cbc_record_digest_supported(const EVP_MD *md);
-
- /* EVP_tls_cbc_digest_record computes the MAC of a decrypted, padded TLS
- * record.
- *
- * md: the hash function used in the HMAC.
- * EVP_tls_cbc_record_digest_supported must return true for this hash.
- * md_out: the digest output. At most EVP_MAX_MD_SIZE bytes will be written.
- * md_out_size: the number of output bytes is written here.
- * header: the 13-byte, TLS record header.
- * data: the record data itself
- * data_plus_mac_size: the secret, reported length of the data and MAC
- * once the padding has been removed.
- * data_plus_mac_plus_padding_size: the public length of the whole
- * record, including padding.
- *
- * On entry: by virtue of having been through one of the remove_padding
- * functions, above, we know that data_plus_mac_size is large enough to contain
- * a padding byte and MAC. (If the padding was invalid, it might contain the
- * padding too. ) */
- int EVP_tls_cbc_digest_record(const EVP_MD *md, uint8_t *md_out,
- size_t *md_out_size, const uint8_t header[13],
- const uint8_t *data, size_t data_plus_mac_size,
- size_t data_plus_mac_plus_padding_size,
- const uint8_t *mac_secret,
- unsigned mac_secret_length);
-
-
- #if defined(__cplusplus)
- } /* extern C */
- #endif
-
- #endif /* OPENSSL_HEADER_CIPHER_EXTRA_INTERNAL_H */
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