+struct dh_method
+ {
+ const char *name;
+ /* Methods here */
+ int (*generate_key)(DH *dh);
+ int (*compute_key)(unsigned char *key,const BIGNUM *pub_key,DH *dh);
+ int (*bn_mod_exp)(const DH *dh, BIGNUM *r, const BIGNUM *a,
+ const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
+ BN_MONT_CTX *m_ctx); /* Can be null */
+
+ int (*init)(DH *dh);
+ int (*finish)(DH *dh);
+ int flags;
+ char *app_data;
+ /* If this is non-NULL, it will be used to generate parameters */
+ int (*generate_params)(DH *dh, int prime_len, int generator, BN_GENCB *cb);
+ };
+
+struct dh_st