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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
- */
- /*
- * DH low level APIs are deprecated for public use, but still ok for
- * internal use.
- */
- #include "internal/deprecated.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 "internal/ffc.h"
- #include "crypto/dh.h"
- #include "encoder_local.h"
- OSSL_FUNC_keymgmt_new_fn *ossl_prov_get_keymgmt_dh_new(void)
- {
- return ossl_prov_get_keymgmt_new(dh_keymgmt_functions);
- }
- OSSL_FUNC_keymgmt_free_fn *ossl_prov_get_keymgmt_dh_free(void)
- {
- return ossl_prov_get_keymgmt_free(dh_keymgmt_functions);
- }
- OSSL_FUNC_keymgmt_import_fn *ossl_prov_get_keymgmt_dh_import(void)
- {
- return ossl_prov_get_keymgmt_import(dh_keymgmt_functions);
- }
- int ossl_prov_print_dh(BIO *out, DH *dh, enum dh_print_type type)
- {
- const char *type_label = NULL;
- const BIGNUM *priv_key = NULL, *pub_key = NULL;
- const BIGNUM *p = NULL;
- switch (type) {
- case dh_print_priv:
- type_label = "DH Private-Key";
- break;
- case dh_print_pub:
- type_label = "DH Public-Key";
- break;
- case dh_print_params:
- type_label = "DH Parameters";
- break;
- }
- if (type == dh_print_priv) {
- priv_key = DH_get0_priv_key(dh);
- if (priv_key == NULL)
- goto null_err;
- }
- if (type == dh_print_priv || type == dh_print_pub) {
- pub_key = DH_get0_pub_key(dh);
- if (pub_key == NULL)
- goto null_err;
- }
- p = DH_get0_p(dh);
- 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, "private-key:", priv_key))
- goto err;
- if (pub_key != NULL
- && !ossl_prov_print_labeled_bignum(out, "public-key:", pub_key))
- goto err;
- if (!ffc_params_prov_print(out, dh_get0_params(dh)))
- 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_dh_params(const void *dh, 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;
- }
- if (nid == EVP_PKEY_DHX)
- params->length = i2d_DHxparams(dh, ¶ms->data);
- else
- params->length = i2d_DHparams(dh, ¶ms->data);
- if (params->length <= 0) {
- ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
- ASN1_STRING_free(params);
- return 0;
- }
- params->type = V_ASN1_SEQUENCE;
- *pstr = params;
- *pstrtype = V_ASN1_SEQUENCE;
- return 1;
- }
- int ossl_prov_dh_pub_to_der(const void *dh, unsigned char **pder)
- {
- const BIGNUM *bn = NULL;
- ASN1_INTEGER *pub_key = NULL;
- int ret;
- if ((bn = DH_get0_pub_key(dh)) == NULL) {
- ERR_raise(ERR_LIB_PROV, PROV_R_NOT_A_PUBLIC_KEY);
- return 0;
- }
- if ((pub_key = BN_to_ASN1_INTEGER(bn, NULL)) == 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_dh_priv_to_der(const void *dh, unsigned char **pder)
- {
- const BIGNUM *bn = NULL;
- ASN1_INTEGER *priv_key = NULL;
- int ret;
- if ((bn = DH_get0_priv_key(dh)) == NULL) {
- ERR_raise(ERR_LIB_PROV, PROV_R_NOT_A_PRIVATE_KEY);
- return 0;
- }
- if ((priv_key = BN_to_ASN1_INTEGER(bn, NULL)) == 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;
- }
- int ossl_prov_dh_type_to_evp(const DH *dh)
- {
- return DH_test_flags(dh, DH_FLAG_TYPE_DHX) ? EVP_PKEY_DHX : EVP_PKEY_DH;
- }
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