-=head1 THE DSA_METHOD STRUCTURE
-
-struct
- {
- /* name of the implementation */
- const char *name;
-
- /* sign */
- DSA_SIG *(*dsa_do_sign)(const unsigned char *dgst, int dlen,
- DSA *dsa);
-
- /* pre-compute k^-1 and r */
- int (*dsa_sign_setup)(DSA *dsa, BN_CTX *ctx_in, BIGNUM **kinvp,
- BIGNUM **rp);
-
- /* verify */
- int (*dsa_do_verify)(const unsigned char *dgst, int dgst_len,
- DSA_SIG *sig, DSA *dsa);
-
- /* compute rr = a1^p1 * a2^p2 mod m (May be NULL for some
- implementations) */
- int (*dsa_mod_exp)(DSA *dsa, BIGNUM *rr, BIGNUM *a1, BIGNUM *p1,
- BIGNUM *a2, BIGNUM *p2, BIGNUM *m,
- BN_CTX *ctx, BN_MONT_CTX *in_mont);
-
- /* compute r = a ^ p mod m (May be NULL for some implementations) */
- int (*bn_mod_exp)(DSA *dsa, BIGNUM *r, BIGNUM *a,
- const BIGNUM *p, const BIGNUM *m,
- BN_CTX *ctx, BN_MONT_CTX *m_ctx);
-
- /* called at DSA_new */
- int (*init)(DSA *DSA);
-
- /* called at DSA_free */
- int (*finish)(DSA *DSA);
-
- int flags;
-
- char *app_data; /* ?? */
-
- } DSA_METHOD;
-