crypto/dh/dh_locl.h

   1 /*
   2  * Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <openssl/dh.h>
  11 #include "internal/refcount.h"
  12
  13 struct dh_st {
  14     /*
  15      * This first argument is used to pick up errors when a DH is passed
  16      * instead of a EVP_PKEY
  17      */
  18     int pad;
  19     int version;
  20     BIGNUM *p;
  21     BIGNUM *g;
  22     int32_t length;             /* optional */
  23     BIGNUM *pub_key;            /* g^x % p */
  24     BIGNUM *priv_key;           /* x */
  25     int flags;
  26     BN_MONT_CTX *method_mont_p;
  27     /* Place holders if we want to do X9.42 DH */
  28     BIGNUM *q;
  29     BIGNUM *j;
  30     unsigned char *seed;
  31     int seedlen;
  32     BIGNUM *counter;
  33     CRYPTO_REF_COUNT references;
  34     CRYPTO_EX_DATA ex_data;
  35     const DH_METHOD *meth;
  36     ENGINE *engine;
  37     CRYPTO_RWLOCK *lock;
  38 };
  39
  40 struct dh_method {
  41     char *name;
  42     /* Methods here */
  43     int (*generate_key) (DH *dh);
  44     int (*compute_key) (unsigned char *key, const BIGNUM *pub_key, DH *dh);
  45
  46     /* Can be null */
  47     int (*bn_mod_exp) (const DH *dh, BIGNUM *r, const BIGNUM *a,
  48                        const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
  49                        BN_MONT_CTX *m_ctx);
  50     int (*init) (DH *dh);
  51     int (*finish) (DH *dh);
  52     int flags;
  53     char *app_data;
  54     /* If this is non-NULL, it will be used to generate parameters */
  55     int (*generate_params) (DH *dh, int prime_len, int generator,
  56                             BN_GENCB *cb);
  57 };