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/*
* crypto_math.h
*
* crypto math operations and data types
*
* David A. McGrew
* Cisco Systems, Inc.
*/
/*
*
* Copyright (c) 2001-2006 Cisco Systems, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 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.
*
* Neither the name of the Cisco Systems, Inc. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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
* COPYRIGHT HOLDERS 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.
*
*/
#ifndef SRTP_CRYPTO_MATH_H
#define SRTP_CRYPTO_MATH_H
#include "datatypes.h"
#ifdef __cplusplus
extern "C" {
#endif
unsigned char
v32_weight(v32_t a);
unsigned char
v32_distance(v32_t x, v32_t y);
unsigned int
v32_dot_product(v32_t a, v32_t b);
char *
v16_bit_string(v16_t x);
char *
v32_bit_string(v32_t x);
char *
v64_bit_string(const v64_t *x);
char *
octet_hex_string(uint8_t x);
char *
v16_hex_string(v16_t x);
char *
v32_hex_string(v32_t x);
char *
v64_hex_string(const v64_t *x);
int
hex_char_to_nibble(uint8_t c);
int
is_hex_string(char *s);
v16_t
hex_string_to_v16(char *s);
v32_t
hex_string_to_v32(char *s);
v64_t
hex_string_to_v64(char *s);
/* the matrix A[] is stored in column format, i.e., A[i] is
the ith column of the matrix */
uint8_t
A_times_x_plus_b(uint8_t A[8], uint8_t x, uint8_t b);
void
v16_copy_octet_string(v16_t *x, const uint8_t s[2]);
void
v32_copy_octet_string(v32_t *x, const uint8_t s[4]);
void
v64_copy_octet_string(v64_t *x, const uint8_t s[8]);
void
v128_add(v128_t *z, v128_t *x, v128_t *y);
int
octet_string_is_eq(uint8_t *a, uint8_t *b, int len);
/*
* the matrix A[] is stored in column format, i.e., A[i] is the ith
* column of the matrix
*/
uint8_t
A_times_x_plus_b(uint8_t A[8], uint8_t x, uint8_t b);
/*
* octet_string_is_eq(a,b, len) returns 1 if the length len strings a
* and b are not equal, returns 0 otherwise
*/
int
octet_string_is_eq(uint8_t *a, uint8_t *b, int len);
#ifdef __cplusplus
}
#endif
#endif /* SRTP_CRYPTO_MATH_H */
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