DSA_meth_set_init (3)
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NAME
DSA_meth_new, DSA_meth_free, DSA_meth_dup, DSA_meth_get0_name, DSA_meth_set1_name, DSA_meth_get_flags, DSA_meth_set_flags, DSA_meth_get0_app_data, DSA_meth_set0_app_data, DSA_meth_get_sign, DSA_meth_set_sign, DSA_meth_get_sign_setup, DSA_meth_set_sign_setup, DSA_meth_get_verify, DSA_meth_set_verify, DSA_meth_get_mod_exp, DSA_meth_set_mod_exp, DSA_meth_get_bn_mod_exp, DSA_meth_set_bn_mod_exp, DSA_meth_get_init, DSA_meth_set_init, DSA_meth_get_finish, DSA_meth_set_finish, DSA_meth_get_paramgen, DSA_meth_set_paramgen, DSA_meth_get_keygen, DSA_meth_set_keygen - Routines to build up DSA methodsSYNOPSIS
#include <openssl/dsa.h> DSA_METHOD *DSA_meth_new(const char *name, int flags); void DSA_meth_free(DSA_METHOD *dsam); DSA_METHOD *DSA_meth_dup(const DSA_METHOD *meth); const char *DSA_meth_get0_name(const DSA_METHOD *dsam); int DSA_meth_set1_name(DSA_METHOD *dsam, const char *name); int DSA_meth_get_flags(DSA_METHOD *dsam); int DSA_meth_set_flags(DSA_METHOD *dsam, int flags); void *DSA_meth_get0_app_data(const DSA_METHOD *dsam); int DSA_meth_set0_app_data(DSA_METHOD *dsam, void *app_data); DSA_SIG *(*DSA_meth_get_sign(const DSA_METHOD *dsam)) (const unsigned char *, int, DSA *); int DSA_meth_set_sign(DSA_METHOD *dsam, DSA_SIG *(*sign) (const unsigned char *, int, DSA *)); int (*DSA_meth_get_sign_setup(const DSA_METHOD *dsam)) (DSA *, BN_CTX *, BIGNUM **, BIGNUM **); int DSA_meth_set_sign_setup(DSA_METHOD *dsam, int (*sign_setup) (DSA *, BN_CTX *, BIGNUM **, BIGNUM **)); int (*DSA_meth_get_verify(const DSA_METHOD *dsam)) (const unsigned char *, int , DSA_SIG *, DSA *); int DSA_meth_set_verify(DSA_METHOD *dsam, int (*verify) (const unsigned char *, int, DSA_SIG *, DSA *)); int (*DSA_meth_get_mod_exp(const DSA_METHOD *dsam)) (DSA *dsa, BIGNUM *rr, BIGNUM *a1, BIGNUM *p1, BIGNUM *a2, BIGNUM *p2, BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *in_mont); int DSA_meth_set_mod_exp(DSA_METHOD *dsam, int (*mod_exp) (DSA *dsa, BIGNUM *rr, BIGNUM *a1, BIGNUM *p1, BIGNUM *a2, BIGNUM *p2, BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *mont)); int (*DSA_meth_get_bn_mod_exp(const DSA_METHOD *dsam)) (DSA *dsa, BIGNUM *r, BIGNUM *a, const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *mont); int DSA_meth_set_bn_mod_exp(DSA_METHOD *dsam, int (*bn_mod_exp) (DSA *dsa, BIGNUM *r, BIGNUM *a, const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *mont)); int (*DSA_meth_get_init(const DSA_METHOD *dsam))(DSA *); int DSA_meth_set_init(DSA_METHOD *dsam, int (*init)(DSA *)); int (*DSA_meth_get_finish(const DSA_METHOD *dsam)) (DSA *); int DSA_meth_set_finish(DSA_METHOD *dsam, int (*finish) (DSA *)); int (*DSA_meth_get_paramgen(const DSA_METHOD *dsam)) (DSA *, int, const unsigned char *, int, int *, unsigned long *, BN_GENCB *); int DSA_meth_set_paramgen(DSA_METHOD *dsam, int (*paramgen) (DSA *, int, const unsigned char *, int, int *, unsigned long *, BN_GENCB *)); int (*DSA_meth_get_keygen(const DSA_METHOD *dsam)) (DSA *); int DSA_meth_set_keygen(DSA_METHOD *dsam, int (*keygen) (DSA *));
DESCRIPTION
TheDSA_meth_new() creates a new
DSA_meth_dup() creates a duplicate copy of the
DSA_meth_free() destroys a
DSA_meth_get0_name() will return a pointer to the name of this
DSA_meth_get_flags() returns the current value of the flags associated with this
The functions DSA_meth_get0_app_data() and DSA_meth_set0_app_data() provide the ability to associate implementation specific data with the
DSA_meth_get_sign() and DSA_meth_set_sign() get and set the function used for creating a
DSA_meth_get_sign_setup() and DSA_meth_set_sign_setup() get and set the function used for precalculating the
DSA_meth_get_verify() and DSA_meth_set_verify() get and set the function used for verifying a
DSA_meth_get_mod_exp() and DSA_meth_set_mod_exp() get and set the function used for computing the following value:
rr = a1^p1 * a2^p2 mod m
This function will be called by the default OpenSSL method during verification of a
DSA_meth_get_bn_mod_exp() and DSA_meth_set_bn_mod_exp() get and set the function used for computing the following value:
r = a ^ p mod m
This function will be called by the default OpenSSL function for DSA_sign_setup(). The result is stored in the r parameter. This function may be
DSA_meth_get_init() and DSA_meth_set_init() get and set the function used for creating a new
DSA_meth_get_finish() and DSA_meth_set_finish() get and set the function used for destroying an instance of a
DSA_meth_get_paramgen() and DSA_meth_set_paramgen() get and set the function used for generating
DSA_meth_get_keygen() and DSA_meth_set_keygen() get and set the function used for generating a new
RETURN VALUES
DSA_meth_new() and DSA_meth_dup() return the newly allocatedDSA_meth_get0_name() and DSA_meth_get_flags() return the name and flags associated with the
All other DSA_meth_get_*() functions return the appropriate function pointer that has been set in the
DSA_meth_set1_name() and all DSA_meth_set_*() functions return 1 on success or 0 on failure.
SEE ALSO
dsa(3), DSA_new(3), DSA_generate_parameters(3), DSA_generate_key(3), DSA_dup_DH(3), DSA_do_sign(3), DSA_set_method(3), DSA_SIG_new(3), DSA_sign(3), DSA_size(3), DSA_get0_pqg(3)HISTORY
The functions described here were added in OpenSSL 1.1.0.COPYRIGHT
Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.Licensed under the OpenSSL license (the ``License''). You may not use this file except in compliance with the License. You can obtain a copy in the file