837 lines
16 KiB
C
837 lines
16 KiB
C
/*
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* Copyright (C) 2008-2017 Tobias Brunner
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* Copyright (C) 2009 Martin Willi
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* HSR Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#include <openssl/opensslconf.h>
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#ifndef OPENSSL_NO_RSA
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#include "openssl_rsa_private_key.h"
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#include "openssl_rsa_public_key.h"
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#include "openssl_hasher.h"
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#include "openssl_util.h"
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#include <utils/debug.h>
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#include <credentials/keys/signature_params.h>
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#include <openssl/bn.h>
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#include <openssl/evp.h>
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#include <openssl/rsa.h>
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/**
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* Public exponent to use for key generation.
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*/
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#define PUBLIC_EXPONENT 0x10001
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#if OPENSSL_VERSION_NUMBER < 0x10100000L
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OPENSSL_KEY_FALLBACK(RSA, key, n, e, d)
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OPENSSL_KEY_FALLBACK(RSA, factors, p, q)
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OPENSSL_KEY_FALLBACK(RSA, crt_params, dmp1, dmq1, iqmp)
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#define BN_secure_new() BN_new()
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#endif
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typedef struct private_openssl_rsa_private_key_t private_openssl_rsa_private_key_t;
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/**
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* Private data of a openssl_rsa_private_key_t object.
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*/
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struct private_openssl_rsa_private_key_t {
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/**
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* Public interface for this signer.
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*/
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openssl_rsa_private_key_t public;
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/**
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* RSA object from OpenSSL
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*/
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RSA *rsa;
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/**
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* TRUE if the key is from an OpenSSL ENGINE and might not be readable
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*/
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bool engine;
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/**
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* reference count
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*/
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refcount_t ref;
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};
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/* implemented in rsa public key */
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bool openssl_rsa_fingerprint(RSA *rsa, cred_encoding_type_t type, chunk_t *fp);
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#if OPENSSL_VERSION_NUMBER >= 0x10000000L
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/**
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* Build RSA signature
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*/
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static bool build_signature(private_openssl_rsa_private_key_t *this,
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const EVP_MD *md, rsa_pss_params_t *pss,
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chunk_t data, chunk_t *sig)
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{
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EVP_PKEY_CTX *pctx = NULL;
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EVP_MD_CTX *mctx = NULL;
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EVP_PKEY *key;
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bool success = FALSE;
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mctx = EVP_MD_CTX_create();
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key = EVP_PKEY_new();
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if (!mctx || !key)
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{
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goto error;
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}
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if (!EVP_PKEY_set1_RSA(key, this->rsa))
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{
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goto error;
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}
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if (EVP_DigestSignInit(mctx, &pctx, md, NULL, key) <= 0)
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{
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goto error;
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}
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if (pss)
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{
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const EVP_MD *mgf1md = openssl_get_md(pss->mgf1_hash);
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if (EVP_PKEY_CTX_set_rsa_padding(pctx, RSA_PKCS1_PSS_PADDING) <= 0 ||
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EVP_PKEY_CTX_set_rsa_pss_saltlen(pctx, pss->salt_len) <= 0 ||
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EVP_PKEY_CTX_set_rsa_mgf1_md(pctx, mgf1md) <= 0)
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{
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goto error;
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}
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}
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if (EVP_DigestSignUpdate(mctx, data.ptr, data.len) <= 0)
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{
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goto error;
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}
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success = (EVP_DigestSignFinal(mctx, sig->ptr, &sig->len) == 1);
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error:
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if (key)
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{
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EVP_PKEY_free(key);
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}
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if (mctx)
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{
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EVP_MD_CTX_destroy(mctx);
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}
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return success;
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}
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/**
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* Build an EMSA PKCS1 signature described in PKCS#1
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*/
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static bool build_emsa_pkcs1_signature(private_openssl_rsa_private_key_t *this,
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int type, chunk_t data, chunk_t *sig)
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{
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const EVP_MD *md;
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*sig = chunk_alloc(RSA_size(this->rsa));
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if (type == NID_undef)
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{
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if (RSA_private_encrypt(data.len, data.ptr, sig->ptr, this->rsa,
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RSA_PKCS1_PADDING) == sig->len)
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{
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return TRUE;
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}
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}
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else
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{
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md = EVP_get_digestbynid(type);
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if (md && build_signature(this, md, NULL, data, sig))
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{
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return TRUE;
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}
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}
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chunk_free(sig);
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return FALSE;
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}
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/**
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* Build an EMSA PSS signature described in PKCS#1
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*/
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static bool build_emsa_pss_signature(private_openssl_rsa_private_key_t *this,
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rsa_pss_params_t *params, chunk_t data,
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chunk_t *sig)
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{
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const EVP_MD *md;
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if (!params)
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{
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return FALSE;
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}
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*sig = chunk_alloc(RSA_size(this->rsa));
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md = openssl_get_md(params->hash);
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if (md && build_signature(this, md, params, data, sig))
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{
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return TRUE;
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}
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chunk_free(sig);
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return FALSE;
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}
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#else /* OPENSSL_VERSION_NUMBER < 1.0 */
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/**
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* Build an EMSA PKCS1 signature described in PKCS#1
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*/
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static bool build_emsa_pkcs1_signature(private_openssl_rsa_private_key_t *this,
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int type, chunk_t data, chunk_t *sig)
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{
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bool success = FALSE;
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*sig = chunk_alloc(RSA_size(this->rsa));
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if (type == NID_undef)
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{
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if (RSA_private_encrypt(data.len, data.ptr, sig->ptr, this->rsa,
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RSA_PKCS1_PADDING) == sig->len)
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{
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success = TRUE;
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}
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}
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else
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{
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EVP_MD_CTX *ctx = NULL;
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EVP_PKEY *key = NULL;
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const EVP_MD *hasher;
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u_int len;
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hasher = EVP_get_digestbynid(type);
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if (!hasher)
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{
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goto error;
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}
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ctx = EVP_MD_CTX_create();
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key = EVP_PKEY_new();
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if (!ctx || !key)
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{
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goto error;
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}
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if (!EVP_PKEY_set1_RSA(key, this->rsa))
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{
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goto error;
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}
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if (!EVP_SignInit_ex(ctx, hasher, NULL))
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{
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goto error;
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}
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if (!EVP_SignUpdate(ctx, data.ptr, data.len))
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{
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goto error;
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}
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if (EVP_SignFinal(ctx, sig->ptr, &len, key))
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{
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success = TRUE;
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}
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error:
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if (key)
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{
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EVP_PKEY_free(key);
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}
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if (ctx)
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{
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EVP_MD_CTX_destroy(ctx);
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}
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}
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if (!success)
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{
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free(sig->ptr);
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}
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return success;
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}
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#endif /* OPENSSL_VERSION_NUMBER < 1.0 */
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METHOD(private_key_t, get_type, key_type_t,
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private_openssl_rsa_private_key_t *this)
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{
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return KEY_RSA;
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}
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METHOD(private_key_t, sign, bool,
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private_openssl_rsa_private_key_t *this, signature_scheme_t scheme,
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void *params, chunk_t data, chunk_t *signature)
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{
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switch (scheme)
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{
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case SIGN_RSA_EMSA_PKCS1_NULL:
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return build_emsa_pkcs1_signature(this, NID_undef, data, signature);
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case SIGN_RSA_EMSA_PKCS1_SHA2_224:
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return build_emsa_pkcs1_signature(this, NID_sha224, data, signature);
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case SIGN_RSA_EMSA_PKCS1_SHA2_256:
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return build_emsa_pkcs1_signature(this, NID_sha256, data, signature);
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case SIGN_RSA_EMSA_PKCS1_SHA2_384:
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return build_emsa_pkcs1_signature(this, NID_sha384, data, signature);
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case SIGN_RSA_EMSA_PKCS1_SHA2_512:
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return build_emsa_pkcs1_signature(this, NID_sha512, data, signature);
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case SIGN_RSA_EMSA_PKCS1_SHA1:
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return build_emsa_pkcs1_signature(this, NID_sha1, data, signature);
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case SIGN_RSA_EMSA_PKCS1_MD5:
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return build_emsa_pkcs1_signature(this, NID_md5, data, signature);
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#if OPENSSL_VERSION_NUMBER >= 0x10000000L
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case SIGN_RSA_EMSA_PSS:
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return build_emsa_pss_signature(this, params, data, signature);
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#endif
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default:
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DBG1(DBG_LIB, "signature scheme %N not supported in RSA",
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signature_scheme_names, scheme);
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return FALSE;
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}
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}
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METHOD(private_key_t, decrypt, bool,
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private_openssl_rsa_private_key_t *this, encryption_scheme_t scheme,
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chunk_t crypto, chunk_t *plain)
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{
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int padding, len;
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char *decrypted;
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switch (scheme)
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{
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case ENCRYPT_RSA_PKCS1:
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padding = RSA_PKCS1_PADDING;
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break;
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case ENCRYPT_RSA_OAEP_SHA1:
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padding = RSA_PKCS1_OAEP_PADDING;
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break;
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default:
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DBG1(DBG_LIB, "encryption scheme %N not supported via openssl",
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encryption_scheme_names, scheme);
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return FALSE;
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}
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decrypted = malloc(RSA_size(this->rsa));
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len = RSA_private_decrypt(crypto.len, crypto.ptr, decrypted,
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this->rsa, padding);
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if (len < 0)
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{
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DBG1(DBG_LIB, "RSA decryption failed");
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free(decrypted);
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return FALSE;
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}
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*plain = chunk_create(decrypted, len);
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return TRUE;
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}
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METHOD(private_key_t, get_keysize, int,
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private_openssl_rsa_private_key_t *this)
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{
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return RSA_size(this->rsa) * 8;
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}
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METHOD(private_key_t, get_public_key, public_key_t*,
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private_openssl_rsa_private_key_t *this)
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{
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chunk_t enc;
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public_key_t *key;
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u_char *p;
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enc = chunk_alloc(i2d_RSAPublicKey(this->rsa, NULL));
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p = enc.ptr;
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i2d_RSAPublicKey(this->rsa, &p);
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key = lib->creds->create(lib->creds, CRED_PUBLIC_KEY, KEY_RSA,
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BUILD_BLOB_ASN1_DER, enc, BUILD_END);
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free(enc.ptr);
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return key;
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}
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METHOD(private_key_t, get_fingerprint, bool,
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private_openssl_rsa_private_key_t *this, cred_encoding_type_t type,
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chunk_t *fingerprint)
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{
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return openssl_rsa_fingerprint(this->rsa, type, fingerprint);
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}
|
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|
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METHOD(private_key_t, get_encoding, bool,
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private_openssl_rsa_private_key_t *this, cred_encoding_type_t type,
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chunk_t *encoding)
|
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{
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|
u_char *p;
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|
|
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if (this->engine)
|
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{
|
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return FALSE;
|
|
}
|
|
switch (type)
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{
|
|
case PRIVKEY_ASN1_DER:
|
|
case PRIVKEY_PEM:
|
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{
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|
bool success = TRUE;
|
|
|
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*encoding = chunk_alloc(i2d_RSAPrivateKey(this->rsa, NULL));
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p = encoding->ptr;
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i2d_RSAPrivateKey(this->rsa, &p);
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|
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if (type == PRIVKEY_PEM)
|
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{
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chunk_t asn1_encoding = *encoding;
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|
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success = lib->encoding->encode(lib->encoding, PRIVKEY_PEM,
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NULL, encoding, CRED_PART_RSA_PRIV_ASN1_DER,
|
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asn1_encoding, CRED_PART_END);
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chunk_clear(&asn1_encoding);
|
|
}
|
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return success;
|
|
}
|
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default:
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return FALSE;
|
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}
|
|
}
|
|
|
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METHOD(private_key_t, get_ref, private_key_t*,
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private_openssl_rsa_private_key_t *this)
|
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{
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ref_get(&this->ref);
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return &this->public.key;
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}
|
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|
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METHOD(private_key_t, destroy, void,
|
|
private_openssl_rsa_private_key_t *this)
|
|
{
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if (ref_put(&this->ref))
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{
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if (this->rsa)
|
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{
|
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lib->encoding->clear_cache(lib->encoding, this->rsa);
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|
RSA_free(this->rsa);
|
|
}
|
|
free(this);
|
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}
|
|
}
|
|
|
|
/**
|
|
* Internal generic constructor
|
|
*/
|
|
static private_openssl_rsa_private_key_t *create_empty()
|
|
{
|
|
private_openssl_rsa_private_key_t *this;
|
|
|
|
INIT(this,
|
|
.public = {
|
|
.key = {
|
|
.get_type = _get_type,
|
|
.sign = _sign,
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|
.decrypt = _decrypt,
|
|
.get_keysize = _get_keysize,
|
|
.get_public_key = _get_public_key,
|
|
.equals = private_key_equals,
|
|
.belongs_to = private_key_belongs_to,
|
|
.get_fingerprint = _get_fingerprint,
|
|
.has_fingerprint = private_key_has_fingerprint,
|
|
.get_encoding = _get_encoding,
|
|
.get_ref = _get_ref,
|
|
.destroy = _destroy,
|
|
},
|
|
},
|
|
.ref = 1,
|
|
);
|
|
|
|
return this;
|
|
}
|
|
|
|
/*
|
|
* See header.
|
|
*/
|
|
openssl_rsa_private_key_t *openssl_rsa_private_key_gen(key_type_t type,
|
|
va_list args)
|
|
{
|
|
private_openssl_rsa_private_key_t *this;
|
|
u_int key_size = 0;
|
|
RSA *rsa = NULL;
|
|
BIGNUM *e = NULL;
|
|
|
|
while (TRUE)
|
|
{
|
|
switch (va_arg(args, builder_part_t))
|
|
{
|
|
case BUILD_KEY_SIZE:
|
|
key_size = va_arg(args, u_int);
|
|
continue;
|
|
case BUILD_END:
|
|
break;
|
|
default:
|
|
return NULL;
|
|
}
|
|
break;
|
|
}
|
|
if (!key_size)
|
|
{
|
|
return NULL;
|
|
}
|
|
e = BN_new();
|
|
if (!e || !BN_set_word(e, PUBLIC_EXPONENT))
|
|
{
|
|
goto error;
|
|
}
|
|
rsa = RSA_new();
|
|
if (!rsa || !RSA_generate_key_ex(rsa, key_size, e, NULL))
|
|
{
|
|
goto error;
|
|
}
|
|
this = create_empty();
|
|
this->rsa = rsa;
|
|
BN_free(e);
|
|
return &this->public;
|
|
|
|
error:
|
|
if (e)
|
|
{
|
|
BN_free(e);
|
|
}
|
|
if (rsa)
|
|
{
|
|
RSA_free(rsa);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* See header
|
|
*/
|
|
private_key_t *openssl_rsa_private_key_create(EVP_PKEY *key, bool engine)
|
|
{
|
|
private_openssl_rsa_private_key_t *this;
|
|
RSA *rsa;
|
|
|
|
rsa = EVP_PKEY_get1_RSA(key);
|
|
EVP_PKEY_free(key);
|
|
if (!rsa)
|
|
{
|
|
return NULL;
|
|
}
|
|
this = create_empty();
|
|
this->rsa = rsa;
|
|
this->engine = engine;
|
|
return &this->public.key;
|
|
}
|
|
|
|
/**
|
|
* Recover the primes from n, e and d using the algorithm described in
|
|
* Appendix C of NIST SP 800-56B.
|
|
*/
|
|
static bool calculate_pq(BIGNUM *n, BIGNUM *e, BIGNUM *d,
|
|
BIGNUM **p, BIGNUM **q)
|
|
{
|
|
BN_CTX *ctx;
|
|
BIGNUM *k, *r, *g, *y, *n1, *x;
|
|
int i, t, j;
|
|
bool success = FALSE;
|
|
|
|
ctx = BN_CTX_new();
|
|
if (!ctx)
|
|
{
|
|
return FALSE;
|
|
}
|
|
BN_CTX_start(ctx);
|
|
k = BN_CTX_get(ctx);
|
|
r = BN_CTX_get(ctx);
|
|
g = BN_CTX_get(ctx);
|
|
y = BN_CTX_get(ctx);
|
|
n1 = BN_CTX_get(ctx);
|
|
x = BN_CTX_get(ctx);
|
|
if (!x)
|
|
{
|
|
goto error;
|
|
}
|
|
/* k = (d * e) - 1 */
|
|
if (!BN_mul(k, d, e, ctx) || !BN_sub(k, k, BN_value_one()))
|
|
{
|
|
goto error;
|
|
}
|
|
/* k must be even */
|
|
if (BN_is_odd(k))
|
|
{
|
|
goto error;
|
|
}
|
|
/* k = 2^t * r, where r is the largest odd integer dividing k, and t >= 1 */
|
|
if (!BN_copy(r, k))
|
|
{
|
|
goto error;
|
|
}
|
|
for (t = 0; !BN_is_odd(r); t++)
|
|
{ /* r = r/2 */
|
|
if (!BN_rshift(r, r, 1))
|
|
{
|
|
goto error;
|
|
}
|
|
}
|
|
/* we need n-1 below */
|
|
if (!BN_sub(n1, n, BN_value_one()))
|
|
{
|
|
goto error;
|
|
}
|
|
for (i = 0; i < 100; i++)
|
|
{ /* generate random integer g in [0, n-1] */
|
|
if (!BN_pseudo_rand_range(g, n))
|
|
{
|
|
goto error;
|
|
}
|
|
/* y = g^r mod n */
|
|
if (!BN_mod_exp(y, g, r, n, ctx))
|
|
{
|
|
goto error;
|
|
}
|
|
/* try again if y == 1 or y == n-1 */
|
|
if (BN_is_one(y) || BN_cmp(y, n1) == 0)
|
|
{
|
|
continue;
|
|
}
|
|
for (j = 0; j < t; j++)
|
|
{ /* x = y^2 mod n */
|
|
if (!BN_mod_sqr(x, y, n, ctx))
|
|
{
|
|
goto error;
|
|
}
|
|
/* stop if x == 1 */
|
|
if (BN_is_one(x))
|
|
{
|
|
goto done;
|
|
}
|
|
/* retry with new g if x = n-1 */
|
|
if (BN_cmp(x, n1) == 0)
|
|
{
|
|
break;
|
|
}
|
|
/* y = x */
|
|
if (!BN_copy(y, x))
|
|
{
|
|
goto error;
|
|
}
|
|
}
|
|
}
|
|
goto error;
|
|
|
|
done:
|
|
/* p = gcd(y-1, n) */
|
|
if (!BN_sub(y, y, BN_value_one()))
|
|
{
|
|
goto error;
|
|
}
|
|
*p = BN_secure_new();
|
|
if (!BN_gcd(*p, y, n, ctx))
|
|
{
|
|
BN_clear_free(*p);
|
|
goto error;
|
|
}
|
|
/* q = n/p */
|
|
*q = BN_secure_new();
|
|
if (!BN_div(*q, NULL, n, *p, ctx))
|
|
{
|
|
BN_clear_free(*p);
|
|
BN_clear_free(*q);
|
|
goto error;
|
|
}
|
|
success = TRUE;
|
|
|
|
error:
|
|
BN_CTX_end(ctx);
|
|
BN_CTX_free(ctx);
|
|
return success;
|
|
}
|
|
|
|
/**
|
|
* Calculates dp = d (mod p-1) or dq = d (mod q-1) for the Chinese remainder
|
|
* algorithm.
|
|
*/
|
|
static BIGNUM *dmodpq1(BIGNUM *d, BIGNUM *pq)
|
|
{
|
|
BN_CTX *ctx;
|
|
BIGNUM *res = NULL, *pq1;
|
|
|
|
ctx = BN_CTX_new();
|
|
if (!ctx)
|
|
{
|
|
return NULL;
|
|
}
|
|
BN_CTX_start(ctx);
|
|
pq1 = BN_CTX_get(ctx);
|
|
/* p|q - 1 */
|
|
if (!BN_sub(pq1, pq, BN_value_one()))
|
|
{
|
|
goto error;
|
|
}
|
|
/* d (mod p|q -1) */
|
|
res = BN_secure_new();
|
|
if (!BN_mod(res, d, pq1, ctx))
|
|
{
|
|
BN_clear_free(res);
|
|
res = NULL;
|
|
goto error;
|
|
}
|
|
|
|
error:
|
|
BN_CTX_end(ctx);
|
|
BN_CTX_free(ctx);
|
|
return res;
|
|
}
|
|
|
|
/**
|
|
* Calculates qinv = q^-1 (mod p) for the Chinese remainder algorithm.
|
|
*/
|
|
static BIGNUM *qinv(BIGNUM *q, BIGNUM *p)
|
|
{
|
|
BN_CTX *ctx;
|
|
BIGNUM *res = NULL;
|
|
|
|
ctx = BN_CTX_new();
|
|
if (!ctx)
|
|
{
|
|
return NULL;
|
|
}
|
|
BN_CTX_start(ctx);
|
|
/* q^-1 (mod p) */
|
|
res = BN_secure_new();
|
|
if (!BN_mod_inverse(res, q, p, ctx))
|
|
{
|
|
BN_clear_free(res);
|
|
res = NULL;
|
|
goto error;
|
|
}
|
|
|
|
error:
|
|
BN_CTX_end(ctx);
|
|
BN_CTX_free(ctx);
|
|
return res;
|
|
}
|
|
|
|
/*
|
|
* See header
|
|
*/
|
|
openssl_rsa_private_key_t *openssl_rsa_private_key_load(key_type_t type,
|
|
va_list args)
|
|
{
|
|
private_openssl_rsa_private_key_t *this;
|
|
chunk_t blob, n, e, d, p, q, exp1, exp2, coeff;
|
|
|
|
blob = n = e = d = p = q = exp1 = exp2 = coeff = chunk_empty;
|
|
while (TRUE)
|
|
{
|
|
switch (va_arg(args, builder_part_t))
|
|
{
|
|
case BUILD_BLOB_ASN1_DER:
|
|
blob = va_arg(args, chunk_t);
|
|
continue;
|
|
case BUILD_RSA_MODULUS:
|
|
n = va_arg(args, chunk_t);
|
|
continue;
|
|
case BUILD_RSA_PUB_EXP:
|
|
e = va_arg(args, chunk_t);
|
|
continue;
|
|
case BUILD_RSA_PRIV_EXP:
|
|
d = va_arg(args, chunk_t);
|
|
continue;
|
|
case BUILD_RSA_PRIME1:
|
|
p = va_arg(args, chunk_t);
|
|
continue;
|
|
case BUILD_RSA_PRIME2:
|
|
q = va_arg(args, chunk_t);
|
|
continue;
|
|
case BUILD_RSA_EXP1:
|
|
exp1 = va_arg(args, chunk_t);
|
|
continue;
|
|
case BUILD_RSA_EXP2:
|
|
exp2 = va_arg(args, chunk_t);
|
|
continue;
|
|
case BUILD_RSA_COEFF:
|
|
coeff = va_arg(args, chunk_t);
|
|
continue;
|
|
case BUILD_END:
|
|
break;
|
|
default:
|
|
return NULL;
|
|
}
|
|
break;
|
|
}
|
|
|
|
this = create_empty();
|
|
if (blob.ptr)
|
|
{
|
|
this->rsa = d2i_RSAPrivateKey(NULL, (const u_char**)&blob.ptr, blob.len);
|
|
if (this->rsa && RSA_check_key(this->rsa) == 1)
|
|
{
|
|
return &this->public;
|
|
}
|
|
}
|
|
else if (n.ptr && e.ptr && d.ptr)
|
|
{
|
|
BIGNUM *bn_n, *bn_e, *bn_d, *bn_p, *bn_q;
|
|
BIGNUM *dmp1 = NULL, *dmq1 = NULL, *iqmp = NULL;
|
|
|
|
this->rsa = RSA_new();
|
|
|
|
bn_n = BN_bin2bn((const u_char*)n.ptr, n.len, NULL);
|
|
bn_e = BN_bin2bn((const u_char*)e.ptr, e.len, NULL);
|
|
bn_d = BN_bin2bn((const u_char*)d.ptr, d.len, NULL);
|
|
if (!RSA_set0_key(this->rsa, bn_n, bn_e, bn_d))
|
|
{
|
|
goto error;
|
|
|
|
}
|
|
if (p.ptr && q.ptr)
|
|
{
|
|
bn_p = BN_bin2bn((const u_char*)p.ptr, p.len, NULL);
|
|
bn_q = BN_bin2bn((const u_char*)q.ptr, q.len, NULL);
|
|
}
|
|
else
|
|
{
|
|
if (!calculate_pq(bn_n, bn_e, bn_d, &bn_p, &bn_q))
|
|
{
|
|
goto error;
|
|
}
|
|
}
|
|
if (!RSA_set0_factors(this->rsa, bn_p, bn_q))
|
|
{
|
|
goto error;
|
|
}
|
|
if (exp1.ptr)
|
|
{
|
|
dmp1 = BN_bin2bn((const u_char*)exp1.ptr, exp1.len, NULL);
|
|
}
|
|
else
|
|
{
|
|
dmp1 = dmodpq1(bn_d, bn_p);
|
|
}
|
|
if (exp2.ptr)
|
|
{
|
|
dmq1 = BN_bin2bn((const u_char*)exp2.ptr, exp2.len, NULL);
|
|
}
|
|
else
|
|
{
|
|
dmq1 = dmodpq1(bn_d, bn_q);
|
|
}
|
|
if (coeff.ptr)
|
|
{
|
|
iqmp = BN_bin2bn((const u_char*)coeff.ptr, coeff.len, NULL);
|
|
}
|
|
else
|
|
{
|
|
iqmp = qinv(bn_q, bn_p);
|
|
}
|
|
if (RSA_set0_crt_params(this->rsa, dmp1, dmq1, iqmp) &&
|
|
RSA_check_key(this->rsa) == 1)
|
|
{
|
|
return &this->public;
|
|
}
|
|
}
|
|
error:
|
|
destroy(this);
|
|
return NULL;
|
|
}
|
|
|
|
#endif /* OPENSSL_NO_RSA */
|