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/*
* Copyright 2019-2020 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
/*
* DSA low level APIs are deprecated for public use, but still ok for
* internal use.
*/
#include "internal/deprecated.h"
#include <openssl/dsa.h>
#include <openssl/err.h>
#include "prov/bio.h" /* ossl_prov_bio_printf() */
#include "prov/implementations.h" /* rsa_keymgmt_functions */
#include "prov/providercommonerr.h" /* PROV_R_BN_ERROR */
#include "serializer_local.h"
#include "internal/ffc.h"
#include "crypto/dsa.h"
OSSL_FUNC_keymgmt_new_fn *ossl_prov_get_keymgmt_dsa_new(void)
{
return ossl_prov_get_keymgmt_new(dsa_keymgmt_functions);
}
OSSL_FUNC_keymgmt_free_fn *ossl_prov_get_keymgmt_dsa_free(void)
{
return ossl_prov_get_keymgmt_free(dsa_keymgmt_functions);
}
OSSL_FUNC_keymgmt_import_fn *ossl_prov_get_keymgmt_dsa_import(void)
{
return ossl_prov_get_keymgmt_import(dsa_keymgmt_functions);
}
int ossl_prov_print_dsa(BIO *out, DSA *dsa, enum dsa_print_type type)
{
const char *type_label = NULL;
const BIGNUM *priv_key = NULL, *pub_key = NULL;
const BIGNUM *p = NULL;
switch (type) {
case dsa_print_priv:
type_label = "Private-Key";
break;
case dsa_print_pub:
type_label = "Public-Key";
break;
case dsa_print_params:
type_label = "DSA-Parameters";
break;
}
if (type == dsa_print_priv) {
priv_key = DSA_get0_priv_key(dsa);
if (priv_key == NULL)
goto null_err;
}
if (type == dsa_print_priv || type == dsa_print_pub) {
pub_key = DSA_get0_pub_key(dsa);
if (pub_key == NULL)
goto null_err;
}
p = DSA_get0_p(dsa);
if (p == NULL)
goto null_err;
if (BIO_printf(out, "%s: (%d bit)\n", type_label, BN_num_bits(p)) <= 0)
goto err;
if (priv_key != NULL
&& !ossl_prov_print_labeled_bignum(out, "priv:", priv_key))
goto err;
if (pub_key != NULL
&& !ossl_prov_print_labeled_bignum(out, "pub: ", pub_key))
goto err;
if (!ffc_params_prov_print(out, dsa_get0_params(dsa)))
goto err;
return 1;
err:
return 0;
null_err:
ERR_raise(ERR_LIB_PROV, ERR_R_PASSED_NULL_PARAMETER);
goto err;
}
int ossl_prov_prepare_dsa_params(const void *dsa, int nid,
void **pstr, int *pstrtype)
{
ASN1_STRING *params = ASN1_STRING_new();
if (params == NULL) {
ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
return 0;
}
params->length = i2d_DSAparams(dsa, ¶ms->data);
if (params->length <= 0) {
ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
ASN1_STRING_free(params);
return 0;
}
*pstrtype = V_ASN1_SEQUENCE;
*pstr = params;
return 1;
}
int ossl_prov_prepare_all_dsa_params(const void *dsa, int nid,
void **pstr, int *pstrtype)
{
const BIGNUM *p = DSA_get0_p(dsa);
const BIGNUM *q = DSA_get0_q(dsa);
const BIGNUM *g = DSA_get0_g(dsa);
if (p != NULL && q != NULL && g != NULL)
return ossl_prov_prepare_dsa_params(dsa, nid, pstr, pstrtype);
*pstr = NULL;
*pstrtype = V_ASN1_UNDEF;
return 1;
}
int ossl_prov_dsa_pub_to_der(const void *dsa, unsigned char **pder)
{
ASN1_INTEGER *pub_key = BN_to_ASN1_INTEGER(DSA_get0_pub_key(dsa), NULL);
int ret;
if (pub_key == NULL) {
ERR_raise(ERR_LIB_PROV, PROV_R_BN_ERROR);
return 0;
}
ret = i2d_ASN1_INTEGER(pub_key, pder);
ASN1_STRING_clear_free(pub_key);
return ret;
}
int ossl_prov_dsa_priv_to_der(const void *dsa, unsigned char **pder)
{
ASN1_INTEGER *priv_key = BN_to_ASN1_INTEGER(DSA_get0_priv_key(dsa), NULL);
int ret;
if (priv_key == NULL) {
ERR_raise(ERR_LIB_PROV, PROV_R_BN_ERROR);
return 0;
}
ret = i2d_ASN1_INTEGER(priv_key, pder);
ASN1_STRING_clear_free(priv_key);
return ret;
}
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