lib/hcrypto/dsa.h

   1 /*
   2  * Copyright (c) 2006 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 /*
  35  * $Id$
  36  */
  37
  38 #ifndef _HEIM_DSA_H
  39 #define _HEIM_DSA_H 1
  40
  41 #include <hcrypto/bn.h>
  42
  43 /* symbol renaming */
  44 #define DSA hc_DSA
  45 #define DSA_METHOD hc_DSA_METHOD
  46 #define DSA_null_method hc_DSA_null_method
  47 #define DSA_new hc_DSA_new
  48 #define DSA_free hc_DSA_free
  49 #define DSA_up_ref hc_DSA_up_ref
  50 #define DSA_set_default_method hc_DSA_set_default_method
  51 #define DSA_get_default_method hc_DSA_get_default_method
  52 #define DSA_set_method hc_DSA_set_method
  53 #define DSA_get_method hc_DSA_get_method
  54 #define DSA_set_app_data hc_DSA_set_app_data
  55 #define DSA_get_app_data hc_DSA_get_app_data
  56 #define DSA_size hc_DSA_size
  57 #define DSA_verify hc_DSA_verify
  58
  59 /*
  60  *
  61  */
  62
  63
  64 typedef struct DSA DSA;
  65 typedef struct DSA_METHOD DSA_METHOD;
  66 typedef struct DSA_SIG DSA_SIG;
  67
  68 struct DSA_SIG {
  69     BIGNUM *r;
  70     BIGNUM *s;
  71 };
  72
  73 struct DSA_METHOD {
  74     const char *name;
  75     DSA_SIG * (*dsa_do_sign)(const unsigned char *, int, DSA *);
  76     int (*dsa_sign_setup)(DSA *, BN_CTX *, BIGNUM **, BIGNUM **);
  77     int (*dsa_do_verify)(const unsigned char *, int, DSA_SIG *, DSA *);
  78     int (*dsa_mod_exp)(DSA *, BIGNUM *, BIGNUM *, BIGNUM *,
  79                        BIGNUM *, BIGNUM *, BIGNUM *, BN_CTX *,
  80                        BN_MONT_CTX *);
  81     int (*bn_mod_exp)(DSA *, BIGNUM *, BIGNUM *, const BIGNUM *,
  82                       const BIGNUM *, BN_CTX *,
  83                       BN_MONT_CTX *);
  84     int (*init)(DSA *);
  85     int (*finish)(DSA *);
  86     int flags;
  87     void *app_data;
  88 };
  89
  90 struct DSA {
  91     int pad;
  92     long version;
  93     int write_params;
  94     BIGNUM *p;
  95     BIGNUM *q;
  96     BIGNUM *g;
  97
  98     BIGNUM *pub_key;
  99     BIGNUM *priv_key;
 100
 101     BIGNUM *kinv;
 102     BIGNUM *r;
 103     int flags;
 104     void *method_mont_p;
 105     int references;
 106     struct dsa_CRYPTO_EX_DATA {
 107         void *sk;
 108         int dummy;
 109     } ex_data;
 110     const DSA_METHOD *meth;
 111     void *engine;
 112 };
 113
 114 /*
 115  *
 116  */
 117
 118 const DSA_METHOD *DSA_null_method(void);
 119
 120 /*
 121  *
 122  */
 123
 124 DSA *   DSA_new(void);
 125 void    DSA_free(DSA *);
 126 int     DSA_up_ref(DSA *);
 127
 128 void    DSA_set_default_method(const DSA_METHOD *);
 129 const DSA_METHOD * DSA_get_default_method(void);
 130
 131 const DSA_METHOD * DSA_get_method(const DSA *);
 132 int DSA_set_method(DSA *, const DSA_METHOD *);
 133
 134 void    DSA_set_app_data(DSA *, void *arg);
 135 void *  DSA_get_app_data(DSA *);
 136
 137 int     DSA_size(const DSA *);
 138
 139 int     DSA_verify(int, const unsigned char *, int,
 140                    const unsigned char *, int, DSA *);
 141
 142 #endif /* _HEIM_DSA_H */