Add current version of libSRTP from CVS.

libsrtp/crypto/include/crypto_math.h

+/*
+ * 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 MATH_H
+#define MATH_H
+
+#include "datatypes.h"
+
+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);
+
+void
+octet_string_set_to_zero(uint8_t *s, 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);
+
+
+#if 0
+#if WORDS_BIGENDIAN
+
+#define _v128_add(z, x, y) {                    \
+  uint64_t tmp;                                 \
+                                                \
+  tmp = x->v32[3] + y->v32[3];                  \
+  z->v32[3] = (uint32_t) tmp;                   \
+                                                \
+  tmp =  x->v32[2] + y->v32[2] + (tmp >> 32);   \
+  z->v32[2] = (uint32_t) tmp;                   \
+                                                \
+  tmp =  x->v32[1] + y->v32[1] + (tmp >> 32);   \
+  z->v32[1] = (uint32_t) tmp;                   \
+                                                \
+  tmp =  x->v32[0] + y->v32[0] + (tmp >> 32);   \
+  z->v32[0] = (uint32_t) tmp;                   \
+}
+
+#else /* assume little endian architecture */
+
+#define _v128_add(z, x, y) {                    \
+  uint64_t tmp;                                 \
+                                                \
+  tmp = htonl(x->v32[3]) + htonl(y->v32[3]);    \
+  z->v32[3] = ntohl((uint32_t) tmp);            \
+                                                \
+  tmp =  htonl(x->v32[2]) + htonl(y->v32[2])    \
+       + htonl(tmp >> 32);                      \
+  z->v32[2] = ntohl((uint32_t) tmp);            \
+                                                \
+  tmp =  htonl(x->v32[1]) + htonl(y->v32[1])    \
+       + htonl(tmp >> 32);                      \
+  z->v32[1] = ntohl((uint32_t) tmp);            \
+                                                \
+  tmp =  htonl(x->v32[0]) + htonl(y->v32[0])    \
+       + htonl(tmp >> 32);                      \
+  z->v32[0] = ntohl((uint32_t) tmp);            \
+}
+                                                
+#endif /* WORDS_BIGENDIAN */                      
+#endif
+
+#ifdef DATATYPES_USE_MACROS  /* little functions are really macros */
+
+#define v128_set_to_zero(z)       _v128_set_to_zero(z)
+#define v128_copy(z, x)           _v128_copy(z, x)
+#define v128_xor(z, x, y)         _v128_xor(z, x, y)
+#define v128_and(z, x, y)         _v128_and(z, x, y)
+#define v128_or(z, x, y)          _v128_or(z, x, y)
+#define v128_complement(x)        _v128_complement(x) 
+#define v128_is_eq(x, y)          _v128_is_eq(x, y)
+#define v128_xor_eq(x, y)         _v128_xor_eq(x, y)
+#define v128_get_bit(x, i)        _v128_get_bit(x, i)
+#define v128_set_bit(x, i)        _v128_set_bit(x, i)
+#define v128_clear_bit(x, i)      _v128_clear_bit(x, i)
+#define v128_set_bit_to(x, i, y)  _v128_set_bit_to(x, i, y)
+
+#else
+
+void
+v128_set_to_zero(v128_t *x);
+
+int
+v128_is_eq(const v128_t *x, const v128_t *y);
+
+void
+v128_copy(v128_t *x, const v128_t *y);
+
+void
+v128_xor(v128_t *z, v128_t *x, v128_t *y);
+
+void
+v128_and(v128_t *z, v128_t *x, v128_t *y);
+
+void
+v128_or(v128_t *z, v128_t *x, v128_t *y); 
+
+void
+v128_complement(v128_t *x);
+
+int
+v128_get_bit(const v128_t *x, int i);
+
+void
+v128_set_bit(v128_t *x, int i) ;     
+
+void
+v128_clear_bit(v128_t *x, int i);    
+
+void
+v128_set_bit_to(v128_t *x, int i, int y);
+
+#endif /* DATATYPES_USE_MACROS */
+
+/*
+ * 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);
+
+void
+octet_string_set_to_zero(uint8_t *s, int len);
+
+
+#endif /* MATH_H */
+
+
+