| Index: libsrtp/crypto/include/gf2_8.h
|
| ===================================================================
|
| --- libsrtp/crypto/include/gf2_8.h (revision 0)
|
| +++ libsrtp/crypto/include/gf2_8.h (revision 0)
|
| @@ -0,0 +1,79 @@
|
| +/*
|
| + * gf2_8.h
|
| + *
|
| + * GF(256) implementation
|
| + *
|
| + * 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 GF2_8_H
|
| +#define GF2_8_H
|
| +
|
| +#include "datatypes.h" /* for uint8_t definition */
|
| +
|
| +typedef uint8_t gf2_8;
|
| +
|
| +#define gf2_8_field_polynomial 0x1B
|
| +
|
| +/*
|
| + * gf2_8_shift(x) returns
|
| + */
|
| +
|
| +/*
|
| + * gf2_8_shift(z) returns the result of the GF(2^8) 'multiply by x'
|
| + * operation, using the field representation from AES; that is, the
|
| + * next gf2_8 value in the cyclic representation of that field. The
|
| + * value z should be an uint8_t.
|
| + */
|
| +
|
| +#define gf2_8_shift(z) (((z) & 128) ? \
|
| + (((z) << 1) ^ gf2_8_field_polynomial) : ((z) << 1))
|
| +
|
| +gf2_8
|
| +gf2_8_compute_inverse(gf2_8 x);
|
| +
|
| +void
|
| +test_gf2_8(void);
|
| +
|
| +gf2_8
|
| +gf2_8_multiply(gf2_8 x, gf2_8 y);
|
| +
|
| +#endif /* GF2_8_H */
|
|
|
| Property changes on: libsrtp/crypto/include/gf2_8.h
|
| ___________________________________________________________________
|
| Added: svn:eol-style
|
| + LF
|
|
|
|
|