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openssl/crypto/dsa/dsa_backend.c

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EVP: Implement support for key downgrading in backends Downgrading EVP_PKEYs from containing provider side internal keys to containing legacy keys demands support in the EVP_PKEY_ASN1_METHOD. This became a bit elaborate because the code would be almost exactly the same as the import functions int EVP_KEYMGMT. Therefore, we end up moving most of the code to common backend support files that can be used both by legacy backend code and by our providers. Reviewed-by: Matt Caswell <matt@openssl.org> (Merged from https://github.com/openssl/openssl/pull/11375)
2020-03-23 12:40:47 +08:00
/*
Update copyright year Reviewed-by: Tomas Mraz <tomas@openssl.org> (Merged from https://github.com/openssl/openssl/pull/13999)
2021-01-28 20:54:57 +08:00
* Copyright 2020-2021 The OpenSSL Project Authors. All Rights Reserved.
EVP: Implement support for key downgrading in backends Downgrading EVP_PKEYs from containing provider side internal keys to containing legacy keys demands support in the EVP_PKEY_ASN1_METHOD. This became a bit elaborate because the code would be almost exactly the same as the import functions int EVP_KEYMGMT. Therefore, we end up moving most of the code to common backend support files that can be used both by legacy backend code and by our providers. Reviewed-by: Matt Caswell <matt@openssl.org> (Merged from https://github.com/openssl/openssl/pull/11375)
2020-03-23 12:40:47 +08:00
*
* 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: provider and library deprecation changes Reviewed-by: Tomas Mraz <tmraz@fedoraproject.org> Reviewed-by: Richard Levitte <levitte@openssl.org> (Merged from https://github.com/openssl/openssl/pull/13638)
2020-10-20 11:32:57 +08:00
/*
* DSA low level APIs are deprecated for public use, but still ok for
* internal use.
*/
#include "internal/deprecated.h"
EVP: Implement support for key downgrading in backends Downgrading EVP_PKEYs from containing provider side internal keys to containing legacy keys demands support in the EVP_PKEY_ASN1_METHOD. This became a bit elaborate because the code would be almost exactly the same as the import functions int EVP_KEYMGMT. Therefore, we end up moving most of the code to common backend support files that can be used both by legacy backend code and by our providers. Reviewed-by: Matt Caswell <matt@openssl.org> (Merged from https://github.com/openssl/openssl/pull/11375)
2020-03-23 12:40:47 +08:00
#include <openssl/core_names.h>
#include "crypto/dsa.h"
/*
* The intention with the "backend" source file is to offer backend support
* for legacy backends (EVP_PKEY_ASN1_METHOD and EVP_PKEY_METHOD) and provider
* implementations alike.
*/
Fix external symbols related to dsa keys Partial fix for #12964 This adds ossl_ names for the following symbols: dsa_check_pairwise, dsa_check_params, dsa_check_priv_key, dsa_check_pub_key, dsa_check_pub_key_partial, dsa_do_sign_int, dsa_ffc_params_fromdata, dsa_generate_ffc_parameters, dsa_generate_public_key, dsa_get0_params, dsa_key_fromdata, dsa_new_with_ctx, dsa_pkey_method, dsa_sign_int Reviewed-by: Paul Dale <pauli@openssl.org> (Merged from https://github.com/openssl/openssl/pull/14231)
2021-02-18 14:30:37 +08:00
int ossl_dsa_key_fromdata(DSA *dsa, const OSSL_PARAM params[])
EVP: Implement support for key downgrading in backends Downgrading EVP_PKEYs from containing provider side internal keys to containing legacy keys demands support in the EVP_PKEY_ASN1_METHOD. This became a bit elaborate because the code would be almost exactly the same as the import functions int EVP_KEYMGMT. Therefore, we end up moving most of the code to common backend support files that can be used both by legacy backend code and by our providers. Reviewed-by: Matt Caswell <matt@openssl.org> (Merged from https://github.com/openssl/openssl/pull/11375)
2020-03-23 12:40:47 +08:00
{
const OSSL_PARAM *param_priv_key, *param_pub_key;
BIGNUM *priv_key = NULL, *pub_key = NULL;
if (dsa == NULL)
return 0;
param_priv_key =
OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PRIV_KEY);
param_pub_key =
OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PUB_KEY);
/* It's ok if neither half is present */
if (param_priv_key == NULL && param_pub_key == NULL)
return 1;
if (param_pub_key != NULL && !OSSL_PARAM_get_BN(param_pub_key, &pub_key))
goto err;
if (param_priv_key != NULL && !OSSL_PARAM_get_BN(param_priv_key, &priv_key))
goto err;
if (!DSA_set0_key(dsa, pub_key, priv_key))
goto err;
return 1;
err:
BN_clear_free(priv_key);
BN_free(pub_key);
return 0;
}