mirror of
https://github.com/openssl/openssl.git
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6d4e6009d2
Since this is public, it is best to make the underlying structure opaque. This means converting from stack allocation to dynamic allocation for all usages. Reviewed-by: Nicola Tuveri <nic.tuv@gmail.com> (Merged from https://github.com/openssl/openssl/pull/11390)
328 lines
9.8 KiB
C
328 lines
9.8 KiB
C
/*
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* Copyright 2019-2020 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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/*
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* DSA low level APIs are deprecated for public use, but still ok for
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* internal use.
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*/
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#include "internal/deprecated.h"
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#include <openssl/core_numbers.h>
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#include <openssl/core_names.h>
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#include <openssl/bn.h>
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#include <openssl/params.h>
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#include "prov/implementations.h"
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#include "prov/providercommon.h"
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#include "prov/provider_ctx.h"
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#include "crypto/dsa.h"
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#include "openssl/param_build.h"
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static OSSL_OP_keymgmt_new_fn dsa_newdata;
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static OSSL_OP_keymgmt_free_fn dsa_freedata;
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static OSSL_OP_keymgmt_get_params_fn dsa_get_params;
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static OSSL_OP_keymgmt_gettable_params_fn dsa_gettable_params;
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static OSSL_OP_keymgmt_has_fn dsa_has;
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static OSSL_OP_keymgmt_match_fn dsa_match;
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static OSSL_OP_keymgmt_validate_fn dsa_validate;
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static OSSL_OP_keymgmt_import_fn dsa_import;
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static OSSL_OP_keymgmt_import_types_fn dsa_import_types;
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static OSSL_OP_keymgmt_export_fn dsa_export;
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static OSSL_OP_keymgmt_export_types_fn dsa_export_types;
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#define DSA_DEFAULT_MD "SHA256"
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#define DSA_POSSIBLE_SELECTIONS \
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(OSSL_KEYMGMT_SELECT_KEYPAIR | OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS)
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static int domparams_to_params(DSA *dsa, OSSL_PARAM_BLD *tmpl)
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{
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const BIGNUM *dsa_p = NULL, *dsa_q = NULL, *dsa_g = NULL;
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if (dsa == NULL)
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return 0;
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DSA_get0_pqg(dsa, &dsa_p, &dsa_q, &dsa_g);
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if (dsa_p != NULL
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&& !OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_FFC_P, dsa_p))
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return 0;
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if (dsa_q != NULL
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&& !OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_FFC_Q, dsa_q))
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return 0;
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if (dsa_g != NULL
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&& !OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_FFC_G, dsa_g))
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return 0;
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return 1;
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}
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static int key_to_params(DSA *dsa, OSSL_PARAM_BLD *tmpl)
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{
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const BIGNUM *priv_key = NULL, *pub_key = NULL;
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if (dsa == NULL)
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return 0;
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if (!domparams_to_params(dsa, tmpl))
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return 0;
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DSA_get0_key(dsa, &pub_key, &priv_key);
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if (priv_key != NULL
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&& !OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_PRIV_KEY, priv_key))
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return 0;
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if (pub_key != NULL
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&& !OSSL_PARAM_BLD_push_BN(tmpl, OSSL_PKEY_PARAM_PUB_KEY, pub_key))
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return 0;
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return 1;
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}
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static void *dsa_newdata(void *provctx)
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{
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return dsa_new_with_ctx(PROV_LIBRARY_CONTEXT_OF(provctx));
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}
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static void dsa_freedata(void *keydata)
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{
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DSA_free(keydata);
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}
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static int dsa_has(void *keydata, int selection)
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{
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DSA *dsa = keydata;
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int ok = 0;
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if (dsa != NULL) {
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if ((selection & DSA_POSSIBLE_SELECTIONS) != 0)
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ok = 1;
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if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0)
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ok = ok && (DSA_get0_pub_key(dsa) != NULL);
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if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
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ok = ok && (DSA_get0_priv_key(dsa) != NULL);
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if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0)
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ok = ok && (DSA_get0_p(dsa) != NULL && DSA_get0_g(dsa) != NULL);
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}
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return ok;
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}
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static int dsa_match(const void *keydata1, const void *keydata2, int selection)
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{
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const DSA *dsa1 = keydata1;
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const DSA *dsa2 = keydata2;
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int ok = 1;
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if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0)
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ok = ok
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&& BN_cmp(DSA_get0_pub_key(dsa1), DSA_get0_pub_key(dsa2)) == 0;
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if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
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ok = ok
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&& BN_cmp(DSA_get0_priv_key(dsa1), DSA_get0_priv_key(dsa2)) == 0;
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if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0) {
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FFC_PARAMS *dsaparams1 = dsa_get0_params((DSA *)dsa1);
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FFC_PARAMS *dsaparams2 = dsa_get0_params((DSA *)dsa2);
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ok = ok && ffc_params_cmp(dsaparams1, dsaparams2, 1);
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}
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return ok;
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}
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static int dsa_import(void *keydata, int selection, const OSSL_PARAM params[])
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{
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DSA *dsa = keydata;
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int ok = 0;
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if (dsa == NULL)
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return 0;
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if ((selection & DSA_POSSIBLE_SELECTIONS) != 0)
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ok = 1;
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if ((selection & OSSL_KEYMGMT_SELECT_ALL_PARAMETERS) != 0)
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ok = ok && ffc_fromdata(dsa_get0_params(dsa), params);
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if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0)
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ok = ok && dsa_key_fromdata(dsa, params);
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return ok;
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}
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static int dsa_export(void *keydata, int selection, OSSL_CALLBACK *param_cb,
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void *cbarg)
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{
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DSA *dsa = keydata;
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OSSL_PARAM_BLD *tmpl = OSSL_PARAM_BLD_new();
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OSSL_PARAM *params = NULL;
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int ok = 1;
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if (dsa == NULL)
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goto err;;
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if ((selection & OSSL_KEYMGMT_SELECT_ALL_PARAMETERS) != 0)
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ok = ok && domparams_to_params(dsa, tmpl);
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if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0)
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ok = ok && key_to_params(dsa, tmpl);
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if (!ok
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|| (params = OSSL_PARAM_BLD_to_param(tmpl)) == NULL)
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goto err;;
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ok = param_cb(params, cbarg);
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OSSL_PARAM_BLD_free_params(params);
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err:
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OSSL_PARAM_BLD_free(tmpl);
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return ok;
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}
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/* IMEXPORT = IMPORT + EXPORT */
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# define DSA_IMEXPORTABLE_PARAMETERS \
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OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_P, NULL, 0), \
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OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_Q, NULL, 0), \
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OSSL_PARAM_BN(OSSL_PKEY_PARAM_FFC_G, NULL, 0)
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# define DSA_IMEXPORTABLE_PUBLIC_KEY \
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OSSL_PARAM_BN(OSSL_PKEY_PARAM_PUB_KEY, NULL, 0)
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# define DSA_IMEXPORTABLE_PRIVATE_KEY \
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OSSL_PARAM_BN(OSSL_PKEY_PARAM_PRIV_KEY, NULL, 0)
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static const OSSL_PARAM dsa_all_types[] = {
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DSA_IMEXPORTABLE_PARAMETERS,
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DSA_IMEXPORTABLE_PUBLIC_KEY,
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DSA_IMEXPORTABLE_PRIVATE_KEY,
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OSSL_PARAM_END
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};
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static const OSSL_PARAM dsa_parameter_types[] = {
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DSA_IMEXPORTABLE_PARAMETERS,
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OSSL_PARAM_END
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};
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static const OSSL_PARAM dsa_key_types[] = {
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DSA_IMEXPORTABLE_PUBLIC_KEY,
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DSA_IMEXPORTABLE_PRIVATE_KEY,
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OSSL_PARAM_END
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};
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static const OSSL_PARAM *dsa_types[] = {
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NULL, /* Index 0 = none of them */
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dsa_parameter_types, /* Index 1 = parameter types */
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dsa_key_types, /* Index 2 = key types */
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dsa_all_types /* Index 3 = 1 + 2 */
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};
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static const OSSL_PARAM *dsa_imexport_types(int selection)
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{
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int type_select = 0;
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if ((selection & OSSL_KEYMGMT_SELECT_ALL_PARAMETERS) != 0)
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type_select += 1;
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if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0)
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type_select += 2;
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return dsa_types[type_select];
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}
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static const OSSL_PARAM *dsa_import_types(int selection)
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{
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return dsa_imexport_types(selection);
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}
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static const OSSL_PARAM *dsa_export_types(int selection)
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{
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return dsa_imexport_types(selection);
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}
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static ossl_inline int dsa_get_params(void *key, OSSL_PARAM params[])
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{
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DSA *dsa = key;
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OSSL_PARAM *p;
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if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_BITS)) != NULL
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&& !OSSL_PARAM_set_int(p, DSA_bits(dsa)))
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return 0;
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if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_SECURITY_BITS)) != NULL
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&& !OSSL_PARAM_set_int(p, DSA_security_bits(dsa)))
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return 0;
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if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_MAX_SIZE)) != NULL
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&& !OSSL_PARAM_set_int(p, DSA_size(dsa)))
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return 0;
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if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_DEFAULT_DIGEST)) != NULL
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&& !OSSL_PARAM_set_utf8_string(p, DSA_DEFAULT_MD))
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return 0;
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return 1;
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}
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static const OSSL_PARAM dsa_params[] = {
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OSSL_PARAM_int(OSSL_PKEY_PARAM_BITS, NULL),
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OSSL_PARAM_int(OSSL_PKEY_PARAM_SECURITY_BITS, NULL),
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OSSL_PARAM_int(OSSL_PKEY_PARAM_MAX_SIZE, NULL),
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OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_DEFAULT_DIGEST, NULL, 0),
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OSSL_PARAM_END
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};
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static const OSSL_PARAM *dsa_gettable_params(void)
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{
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return dsa_params;
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}
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static int dsa_validate_domparams(DSA *dsa)
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{
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int status = 0;
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return dsa_check_params(dsa, &status);
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}
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static int dsa_validate_public(DSA *dsa)
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{
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int status = 0;
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const BIGNUM *pub_key = NULL;
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DSA_get0_key(dsa, &pub_key, NULL);
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return dsa_check_pub_key(dsa, pub_key, &status);
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}
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static int dsa_validate_private(DSA *dsa)
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{
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int status = 0;
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const BIGNUM *priv_key = NULL;
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DSA_get0_key(dsa, NULL, &priv_key);
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return dsa_check_priv_key(dsa, priv_key, &status);
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}
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static int dsa_validate(void *keydata, int selection)
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{
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DSA *dsa = keydata;
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int ok = 0;
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if ((selection & DSA_POSSIBLE_SELECTIONS) != 0)
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ok = 1;
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if ((selection & OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS) != 0)
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ok = ok && dsa_validate_domparams(dsa);
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if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0)
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ok = ok && dsa_validate_public(dsa);
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if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
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ok = ok && dsa_validate_private(dsa);
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/* If the whole key is selected, we do a pairwise validation */
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if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR)
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== OSSL_KEYMGMT_SELECT_KEYPAIR)
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ok = ok && dsa_check_pairwise(dsa);
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return ok;
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}
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const OSSL_DISPATCH dsa_keymgmt_functions[] = {
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{ OSSL_FUNC_KEYMGMT_NEW, (void (*)(void))dsa_newdata },
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{ OSSL_FUNC_KEYMGMT_FREE, (void (*)(void))dsa_freedata },
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{ OSSL_FUNC_KEYMGMT_GET_PARAMS, (void (*) (void))dsa_get_params },
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{ OSSL_FUNC_KEYMGMT_GETTABLE_PARAMS, (void (*) (void))dsa_gettable_params },
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{ OSSL_FUNC_KEYMGMT_HAS, (void (*)(void))dsa_has },
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{ OSSL_FUNC_KEYMGMT_MATCH, (void (*)(void))dsa_match },
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{ OSSL_FUNC_KEYMGMT_VALIDATE, (void (*)(void))dsa_validate },
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{ OSSL_FUNC_KEYMGMT_IMPORT, (void (*)(void))dsa_import },
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{ OSSL_FUNC_KEYMGMT_IMPORT_TYPES, (void (*)(void))dsa_import_types },
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{ OSSL_FUNC_KEYMGMT_EXPORT, (void (*)(void))dsa_export },
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{ OSSL_FUNC_KEYMGMT_EXPORT_TYPES, (void (*)(void))dsa_export_types },
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{ 0, NULL }
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};
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