release/src-rt-6.x.4708/include/bcmcrypto/dh.h

   1 /*
   2  * dh.h: Diffie-Hellman header file.
   3  *
   4  * Code copied from openssl distribution and
   5  * Modified just enough so that compiles and runs standalone
   6  *
   7  * Copyright (C) 2012, Broadcom Corporation. All Rights Reserved.
   8  *
   9  * Permission to use, copy, modify, and/or distribute this software for any
  10  * purpose with or without fee is hereby granted, provided that the above
  11  * copyright notice and this permission notice appear in all copies.
  12  *
  13  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  14  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  15  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  16  * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  17  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  18  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  19  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  20  *
  21  * $Id: dh.h 241182 2011-02-17 21:50:03Z $
  22  */
  23 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  24  * All rights reserved.
  25  *
  26  * This package is an SSL implementation written
  27  * by Eric Young (eay@cryptsoft.com).
  28  * The implementation was written so as to conform with Netscapes SSL.
  29  *
  30  * This library is free for commercial and non-commercial use as long as
  31  * the following conditions are aheared to.  The following conditions
  32  * apply to all code found in this distribution, be it the RC4, RSA,
  33  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  34  * included with this distribution is covered by the same copyright terms
  35  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  36  *
  37  * Copyright remains Eric Young's, and as such any Copyright notices in
  38  * the code are not to be removed.
  39  * If this package is used in a product, Eric Young should be given attribution
  40  * as the author of the parts of the library used.
  41  * This can be in the form of a textual message at program startup or
  42  * in documentation (online or textual) provided with the package.
  43  *
  44  * Redistribution and use in source and binary forms, with or without
  45  * modification, are permitted provided that the following conditions
  46  * are met:
  47  * 1. Redistributions of source code must retain the copyright
  48  *    notice, this list of conditions and the following disclaimer.
  49  * 2. Redistributions in binary form must reproduce the above copyright
  50  *    notice, this list of conditions and the following disclaimer in the
  51  *    documentation and/or other materials provided with the distribution.
  52  * 3. All advertising materials mentioning features or use of this software
  53  *    must display the following acknowledgement:
  54  *    "This product includes cryptographic software written by
  55  *     Eric Young (eay@cryptsoft.com)"
  56  *    The word 'cryptographic' can be left out if the rouines from the library
  57  *    being used are not cryptographic related :-).
  58  * 4. If you include any Windows specific code (or a derivative thereof) from
  59  *    the apps directory (application code) you must include an acknowledgement:
  60  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  61  *
  62  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  63  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  64  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  65  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  66  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  67  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  68  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  69  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  70  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  71  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  72  * SUCH DAMAGE.
  73  *
  74  * The licence and distribution terms for any publically available version or
  75  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  76  * copied and put under another distribution licence
  77  * [including the GNU Public Licence.]
  78  */
  79
  80 #ifndef HEADER_DH_H
  81 #define HEADER_DH_H
  82
  83 #include <bcmcrypto/bn.h>
  84
  85 #define DH_FLAG_CACHE_MONT_P    0x01
  86
  87 typedef struct dh_st
  88         {
  89         BIGNUM *p;
  90         BIGNUM *g;
  91         long length; /* optional */
  92         BIGNUM *pub_key;        /* g^x */
  93         BIGNUM *priv_key;       /* x */
  94
  95         int flags;
  96         BN_MONT_CTX *method_mont_p;
  97         /* Place holders if we want to do X9.42 DH */
  98         BIGNUM *q;
  99         BIGNUM *j;
 100         unsigned char *seed;
 101         int seedlen;
 102         BIGNUM *counter;
 103         } DH;
 104
 105 #define DH_GENERATOR_2          2
 106 /* #define DH_GENERATOR_3       3 */
 107 #define DH_GENERATOR_5          5
 108
 109 /* DH_check error codes */
 110 #define DH_CHECK_P_NOT_PRIME            0x01
 111 #define DH_CHECK_P_NOT_SAFE_PRIME       0x02
 112 #define DH_UNABLE_TO_CHECK_GENERATOR    0x04
 113 #define DH_NOT_SUITABLE_GENERATOR       0x08
 114
 115 /* primes p where (p-1)/2 is prime too are called "safe"; we define
 116  * this for backward compatibility:
 117  */
 118 #define DH_CHECK_P_NOT_STRONG_PRIME     DH_CHECK_P_NOT_SAFE_PRIME
 119
 120
 121 DH *    DH_new(void);
 122 void    DH_free(DH *dh);
 123 int     DH_generate_key(unsigned char *key, DH *dh);
 124 int     DH_compute_key(unsigned char *key, unsigned char *pubbuf, int buflen, DH *dh);
 125 int     DH_compute_key_bn(unsigned char *key, BIGNUM *peer_key, DH *dh);
 126 DH      *DH_init(unsigned char *pbuf, int plen, int g);
 127
 128 /* for standalone test purposes */
 129 int     DH_size(const DH *dh);
 130 DH *    DH_generate_parameters(DH *dh, int prime_len, int generator,
 131                                void (*callback)(int, int, void *), void *cb_arg);
 132 int     DH_check(const DH *dh, int *codes);
 133
 134 #endif  /* HEADER_DH_H */