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https://github.com/openssl/openssl.git
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28e1d588f1
The private key length is supposed to be a user settable parameter. We do check if it's set or not, and if not, we do apply defaults. Fixes #12071 Reviewed-by: Tomas Mraz <tmraz@fedoraproject.org> (Merged from https://github.com/openssl/openssl/pull/13140)
121 lines
3.1 KiB
C
121 lines
3.1 KiB
C
/*
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* Copyright 2020 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <openssl/core_names.h>
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#include "internal/param_build_set.h"
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#include "crypto/dh.h"
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/*
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* The intention with the "backend" source file is to offer backend functions
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* for legacy backends (EVP_PKEY_ASN1_METHOD and EVP_PKEY_METHOD) and provider
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* implementations alike.
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*/
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static int dh_ffc_params_fromdata(DH *dh, const OSSL_PARAM params[])
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{
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int ret;
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FFC_PARAMS *ffc;
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if (dh == NULL)
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return 0;
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ffc = dh_get0_params(dh);
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if (ffc == NULL)
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return 0;
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ret = ossl_ffc_params_fromdata(ffc, params);
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if (ret)
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dh_cache_named_group(dh); /* This increments dh->dirty_cnt */
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return ret;
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}
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int dh_params_fromdata(DH *dh, const OSSL_PARAM params[])
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{
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const OSSL_PARAM *param_priv_len;
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long priv_len;
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if (!dh_ffc_params_fromdata(dh, params))
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return 0;
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param_priv_len =
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OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_DH_PRIV_LEN);
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if (param_priv_len != NULL
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&& (!OSSL_PARAM_get_long(param_priv_len, &priv_len)
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|| !DH_set_length(dh, priv_len)))
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return 0;
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return 1;
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}
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int dh_key_fromdata(DH *dh, const OSSL_PARAM params[])
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{
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const OSSL_PARAM *param_priv_key, *param_pub_key;
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BIGNUM *priv_key = NULL, *pub_key = NULL;
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if (dh == NULL)
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return 0;
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param_priv_key = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PRIV_KEY);
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param_pub_key = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PUB_KEY);
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/*
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* DH documentation says that a public key must be present if a
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* private key is present.
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* We want to have at least a public key either way, so we end up
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* requiring it unconditionally.
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*/
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if (param_priv_key != NULL && param_pub_key == NULL)
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return 0;
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if ((param_priv_key != NULL
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&& !OSSL_PARAM_get_BN(param_priv_key, &priv_key))
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|| (param_pub_key != NULL
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&& !OSSL_PARAM_get_BN(param_pub_key, &pub_key)))
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goto err;
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if (!DH_set0_key(dh, pub_key, priv_key))
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goto err;
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return 1;
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err:
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BN_clear_free(priv_key);
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BN_free(pub_key);
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return 0;
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}
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int dh_params_todata(DH *dh, OSSL_PARAM_BLD *bld, OSSL_PARAM params[])
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{
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long l = DH_get_length(dh);
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if (!ossl_ffc_params_todata(dh_get0_params(dh), bld, params))
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return 0;
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if (l > 0
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&& !ossl_param_build_set_long(bld, params, OSSL_PKEY_PARAM_DH_PRIV_LEN, l))
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return 0;
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return 1;
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}
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int dh_key_todata(DH *dh, OSSL_PARAM_BLD *bld, OSSL_PARAM params[])
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{
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const BIGNUM *priv = NULL, *pub = NULL;
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if (dh == NULL)
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return 0;
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DH_get0_key(dh, &pub, &priv);
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if (priv != NULL
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&& !ossl_param_build_set_bn(bld, params, OSSL_PKEY_PARAM_PRIV_KEY, priv))
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return 0;
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if (pub != NULL
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&& !ossl_param_build_set_bn(bld, params, OSSL_PKEY_PARAM_PUB_KEY, pub))
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return 0;
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return 1;
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}
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