mirror of
https://gitlab.isc.org/isc-projects/bind9
synced 2025-08-22 10:10:06 +00:00
Remove the dynamic registration of result codes. Convert isc_result_t from unsigned + #defines into 32-bit enum type in grand unified <isc/result.h> header. Keep the existing values of the result codes even at the expense of the description and identifier tables being unnecessary large. Additionally, add couple of: switch (result) { [...] default: break; } statements where compiler now complains about missing enum values in the switch statement.
1184 lines
25 KiB
C
1184 lines
25 KiB
C
/*
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* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, you can obtain one at https://mozilla.org/MPL/2.0/.
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*
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* See the COPYRIGHT file distributed with this work for additional
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* information regarding copyright ownership.
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*/
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/*! \file */
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#include <inttypes.h>
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#include <stdbool.h>
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#include <openssl/bn.h>
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#include <openssl/err.h>
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#include <openssl/objects.h>
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#include <openssl/rsa.h>
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#include <isc/mem.h>
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#include <isc/result.h>
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#include <isc/safe.h>
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#include <isc/string.h>
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#include <isc/util.h>
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#include "dst_internal.h"
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#include "dst_openssl.h"
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#include "dst_parse.h"
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#if !defined(OPENSSL_NO_ENGINE)
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#include <openssl/engine.h>
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#endif /* if !defined(OPENSSL_NO_ENGINE) */
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/*
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* Limit the size of public exponents.
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*/
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#ifndef RSA_MAX_PUBEXP_BITS
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#define RSA_MAX_PUBEXP_BITS 35
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#endif /* ifndef RSA_MAX_PUBEXP_BITS */
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#define DST_RET(a) \
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{ \
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ret = a; \
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goto err; \
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}
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#if !HAVE_RSA_SET0_KEY
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/* From OpenSSL 1.1.0 */
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static int
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RSA_set0_key(RSA *r, BIGNUM *n, BIGNUM *e, BIGNUM *d) {
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/*
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* If the fields n and e in r are NULL, the corresponding input
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* parameters MUST be non-NULL for n and e. d may be
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* left NULL (in case only the public key is used).
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*/
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if ((r->n == NULL && n == NULL) || (r->e == NULL && e == NULL)) {
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return (0);
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}
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if (n != NULL) {
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BN_free(r->n);
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r->n = n;
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}
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if (e != NULL) {
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BN_free(r->e);
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r->e = e;
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}
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if (d != NULL) {
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BN_free(r->d);
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r->d = d;
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}
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return (1);
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}
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static int
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RSA_set0_factors(RSA *r, BIGNUM *p, BIGNUM *q) {
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/*
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* If the fields p and q in r are NULL, the corresponding input
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* parameters MUST be non-NULL.
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*/
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if ((r->p == NULL && p == NULL) || (r->q == NULL && q == NULL)) {
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return (0);
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}
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if (p != NULL) {
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BN_free(r->p);
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r->p = p;
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}
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if (q != NULL) {
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BN_free(r->q);
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r->q = q;
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}
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return (1);
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}
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static int
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RSA_set0_crt_params(RSA *r, BIGNUM *dmp1, BIGNUM *dmq1, BIGNUM *iqmp) {
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/*
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* If the fields dmp1, dmq1 and iqmp in r are NULL, the
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* corresponding input parameters MUST be non-NULL.
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*/
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if ((r->dmp1 == NULL && dmp1 == NULL) ||
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(r->dmq1 == NULL && dmq1 == NULL) ||
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(r->iqmp == NULL && iqmp == NULL))
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{
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return (0);
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}
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if (dmp1 != NULL) {
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BN_free(r->dmp1);
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r->dmp1 = dmp1;
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}
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if (dmq1 != NULL) {
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BN_free(r->dmq1);
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r->dmq1 = dmq1;
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}
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if (iqmp != NULL) {
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BN_free(r->iqmp);
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r->iqmp = iqmp;
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}
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return (1);
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}
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static void
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RSA_get0_key(const RSA *r, const BIGNUM **n, const BIGNUM **e,
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const BIGNUM **d) {
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if (n != NULL) {
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*n = r->n;
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}
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if (e != NULL) {
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*e = r->e;
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}
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if (d != NULL) {
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*d = r->d;
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}
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}
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static void
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RSA_get0_factors(const RSA *r, const BIGNUM **p, const BIGNUM **q) {
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if (p != NULL) {
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*p = r->p;
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}
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if (q != NULL) {
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*q = r->q;
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}
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}
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static void
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RSA_get0_crt_params(const RSA *r, const BIGNUM **dmp1, const BIGNUM **dmq1,
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const BIGNUM **iqmp) {
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if (dmp1 != NULL) {
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*dmp1 = r->dmp1;
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}
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if (dmq1 != NULL) {
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*dmq1 = r->dmq1;
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}
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if (iqmp != NULL) {
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*iqmp = r->iqmp;
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}
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}
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static int
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RSA_test_flags(const RSA *r, int flags) {
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return (r->flags & flags);
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}
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#endif /* !HAVE_RSA_SET0_KEY */
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static isc_result_t
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opensslrsa_createctx(dst_key_t *key, dst_context_t *dctx) {
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EVP_MD_CTX *evp_md_ctx;
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const EVP_MD *type = NULL;
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UNUSED(key);
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REQUIRE(dctx->key->key_alg == DST_ALG_RSASHA1 ||
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dctx->key->key_alg == DST_ALG_NSEC3RSASHA1 ||
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dctx->key->key_alg == DST_ALG_RSASHA256 ||
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dctx->key->key_alg == DST_ALG_RSASHA512);
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/*
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* Reject incorrect RSA key lengths.
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*/
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switch (dctx->key->key_alg) {
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case DST_ALG_RSASHA1:
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case DST_ALG_NSEC3RSASHA1:
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/* From RFC 3110 */
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if (dctx->key->key_size > 4096) {
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return (ISC_R_FAILURE);
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}
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break;
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case DST_ALG_RSASHA256:
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/* From RFC 5702 */
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if ((dctx->key->key_size < 512) || (dctx->key->key_size > 4096))
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{
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return (ISC_R_FAILURE);
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}
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break;
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case DST_ALG_RSASHA512:
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/* From RFC 5702 */
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if ((dctx->key->key_size < 1024) ||
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(dctx->key->key_size > 4096)) {
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return (ISC_R_FAILURE);
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}
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break;
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default:
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INSIST(0);
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ISC_UNREACHABLE();
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}
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evp_md_ctx = EVP_MD_CTX_create();
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if (evp_md_ctx == NULL) {
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return (ISC_R_NOMEMORY);
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}
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switch (dctx->key->key_alg) {
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case DST_ALG_RSASHA1:
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case DST_ALG_NSEC3RSASHA1:
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type = EVP_sha1(); /* SHA1 + RSA */
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break;
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case DST_ALG_RSASHA256:
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type = EVP_sha256(); /* SHA256 + RSA */
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break;
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case DST_ALG_RSASHA512:
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type = EVP_sha512();
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break;
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default:
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INSIST(0);
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ISC_UNREACHABLE();
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}
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if (!EVP_DigestInit_ex(evp_md_ctx, type, NULL)) {
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EVP_MD_CTX_destroy(evp_md_ctx);
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return (dst__openssl_toresult3(
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dctx->category, "EVP_DigestInit_ex", ISC_R_FAILURE));
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}
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dctx->ctxdata.evp_md_ctx = evp_md_ctx;
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return (ISC_R_SUCCESS);
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}
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static void
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opensslrsa_destroyctx(dst_context_t *dctx) {
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EVP_MD_CTX *evp_md_ctx = dctx->ctxdata.evp_md_ctx;
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REQUIRE(dctx->key->key_alg == DST_ALG_RSASHA1 ||
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dctx->key->key_alg == DST_ALG_NSEC3RSASHA1 ||
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dctx->key->key_alg == DST_ALG_RSASHA256 ||
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dctx->key->key_alg == DST_ALG_RSASHA512);
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if (evp_md_ctx != NULL) {
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EVP_MD_CTX_destroy(evp_md_ctx);
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dctx->ctxdata.evp_md_ctx = NULL;
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}
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}
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static isc_result_t
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opensslrsa_adddata(dst_context_t *dctx, const isc_region_t *data) {
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EVP_MD_CTX *evp_md_ctx = dctx->ctxdata.evp_md_ctx;
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REQUIRE(dctx->key->key_alg == DST_ALG_RSASHA1 ||
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dctx->key->key_alg == DST_ALG_NSEC3RSASHA1 ||
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dctx->key->key_alg == DST_ALG_RSASHA256 ||
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dctx->key->key_alg == DST_ALG_RSASHA512);
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if (!EVP_DigestUpdate(evp_md_ctx, data->base, data->length)) {
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return (dst__openssl_toresult3(
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dctx->category, "EVP_DigestUpdate", ISC_R_FAILURE));
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}
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return (ISC_R_SUCCESS);
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}
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static isc_result_t
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opensslrsa_sign(dst_context_t *dctx, isc_buffer_t *sig) {
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dst_key_t *key = dctx->key;
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isc_region_t r;
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unsigned int siglen = 0;
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EVP_MD_CTX *evp_md_ctx = dctx->ctxdata.evp_md_ctx;
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EVP_PKEY *pkey = key->keydata.pkey;
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REQUIRE(dctx->key->key_alg == DST_ALG_RSASHA1 ||
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dctx->key->key_alg == DST_ALG_NSEC3RSASHA1 ||
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dctx->key->key_alg == DST_ALG_RSASHA256 ||
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dctx->key->key_alg == DST_ALG_RSASHA512);
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isc_buffer_availableregion(sig, &r);
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if (r.length < (unsigned int)EVP_PKEY_size(pkey)) {
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return (ISC_R_NOSPACE);
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}
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if (!EVP_SignFinal(evp_md_ctx, r.base, &siglen, pkey)) {
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return (dst__openssl_toresult3(dctx->category, "EVP_SignFinal",
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ISC_R_FAILURE));
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}
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isc_buffer_add(sig, siglen);
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return (ISC_R_SUCCESS);
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}
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static isc_result_t
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opensslrsa_verify2(dst_context_t *dctx, int maxbits, const isc_region_t *sig) {
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dst_key_t *key = dctx->key;
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int status = 0;
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const BIGNUM *e = NULL;
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EVP_MD_CTX *evp_md_ctx = dctx->ctxdata.evp_md_ctx;
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EVP_PKEY *pkey = key->keydata.pkey;
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RSA *rsa;
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int bits;
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REQUIRE(dctx->key->key_alg == DST_ALG_RSASHA1 ||
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dctx->key->key_alg == DST_ALG_NSEC3RSASHA1 ||
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dctx->key->key_alg == DST_ALG_RSASHA256 ||
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dctx->key->key_alg == DST_ALG_RSASHA512);
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rsa = EVP_PKEY_get1_RSA(pkey);
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if (rsa == NULL) {
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return (dst__openssl_toresult(DST_R_OPENSSLFAILURE));
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}
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RSA_get0_key(rsa, NULL, &e, NULL);
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bits = BN_num_bits(e);
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RSA_free(rsa);
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if (bits > maxbits && maxbits != 0) {
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return (DST_R_VERIFYFAILURE);
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}
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status = EVP_VerifyFinal(evp_md_ctx, sig->base, sig->length, pkey);
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switch (status) {
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case 1:
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return (ISC_R_SUCCESS);
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case 0:
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return (dst__openssl_toresult(DST_R_VERIFYFAILURE));
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default:
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return (dst__openssl_toresult3(dctx->category,
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"EVP_VerifyFinal",
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DST_R_VERIFYFAILURE));
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}
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}
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static isc_result_t
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opensslrsa_verify(dst_context_t *dctx, const isc_region_t *sig) {
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return (opensslrsa_verify2(dctx, 0, sig));
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}
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static bool
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opensslrsa_compare(const dst_key_t *key1, const dst_key_t *key2) {
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int status;
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RSA *rsa1 = NULL, *rsa2 = NULL;
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const BIGNUM *n1 = NULL, *n2 = NULL;
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const BIGNUM *e1 = NULL, *e2 = NULL;
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const BIGNUM *d1 = NULL, *d2 = NULL;
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const BIGNUM *p1 = NULL, *p2 = NULL;
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const BIGNUM *q1 = NULL, *q2 = NULL;
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EVP_PKEY *pkey1, *pkey2;
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pkey1 = key1->keydata.pkey;
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pkey2 = key2->keydata.pkey;
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/*
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* The pkey reference will keep these around after
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* the RSA_free() call.
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*/
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if (pkey1 != NULL) {
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rsa1 = EVP_PKEY_get1_RSA(pkey1);
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RSA_free(rsa1);
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}
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if (pkey2 != NULL) {
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rsa2 = EVP_PKEY_get1_RSA(pkey2);
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RSA_free(rsa2);
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}
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if (rsa1 == NULL && rsa2 == NULL) {
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return (true);
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} else if (rsa1 == NULL || rsa2 == NULL) {
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return (false);
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}
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RSA_get0_key(rsa1, &n1, &e1, &d1);
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RSA_get0_key(rsa2, &n2, &e2, &d2);
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status = BN_cmp(n1, n2) || BN_cmp(e1, e2);
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if (status != 0) {
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return (false);
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}
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if (RSA_test_flags(rsa1, RSA_FLAG_EXT_PKEY) != 0 ||
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RSA_test_flags(rsa2, RSA_FLAG_EXT_PKEY) != 0)
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{
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if (RSA_test_flags(rsa1, RSA_FLAG_EXT_PKEY) == 0 ||
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RSA_test_flags(rsa2, RSA_FLAG_EXT_PKEY) == 0)
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{
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return (false);
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}
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/*
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* Can't compare private parameters, BTW does it make sense?
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*/
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return (true);
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}
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|
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if (d1 != NULL || d2 != NULL) {
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if (d1 == NULL || d2 == NULL) {
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return (false);
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}
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RSA_get0_factors(rsa1, &p1, &q1);
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RSA_get0_factors(rsa2, &p2, &q2);
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status = BN_cmp(d1, d2) || BN_cmp(p1, p1) || BN_cmp(q1, q2);
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|
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if (status != 0) {
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return (false);
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}
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}
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return (true);
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}
|
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|
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static int
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progress_cb(int p, int n, BN_GENCB *cb) {
|
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union {
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void *dptr;
|
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void (*fptr)(int);
|
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} u;
|
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|
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UNUSED(n);
|
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|
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u.dptr = BN_GENCB_get_arg(cb);
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if (u.fptr != NULL) {
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u.fptr(p);
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}
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return (1);
|
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}
|
|
|
|
static isc_result_t
|
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opensslrsa_generate(dst_key_t *key, int exp, void (*callback)(int)) {
|
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isc_result_t ret = DST_R_OPENSSLFAILURE;
|
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union {
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void *dptr;
|
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void (*fptr)(int);
|
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} u;
|
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RSA *rsa = RSA_new();
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BIGNUM *e = BN_new();
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#if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)
|
|
BN_GENCB _cb;
|
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#endif /* if OPENSSL_VERSION_NUMBER < 0x10100000L || \
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* defined(LIBRESSL_VERSION_NUMBER) */
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BN_GENCB *cb = BN_GENCB_new();
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EVP_PKEY *pkey = EVP_PKEY_new();
|
|
|
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/*
|
|
* Reject incorrect RSA key lengths.
|
|
*/
|
|
switch (key->key_alg) {
|
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case DST_ALG_RSASHA1:
|
|
case DST_ALG_NSEC3RSASHA1:
|
|
/* From RFC 3110 */
|
|
if (key->key_size > 4096) {
|
|
goto err;
|
|
}
|
|
break;
|
|
case DST_ALG_RSASHA256:
|
|
/* From RFC 5702 */
|
|
if ((key->key_size < 512) || (key->key_size > 4096)) {
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goto err;
|
|
}
|
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break;
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case DST_ALG_RSASHA512:
|
|
/* From RFC 5702 */
|
|
if ((key->key_size < 1024) || (key->key_size > 4096)) {
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goto err;
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}
|
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break;
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default:
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INSIST(0);
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ISC_UNREACHABLE();
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}
|
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|
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if (rsa == NULL || e == NULL || cb == NULL) {
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goto err;
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}
|
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if (pkey == NULL) {
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goto err;
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}
|
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if (!EVP_PKEY_set1_RSA(pkey, rsa)) {
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goto err;
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}
|
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|
|
if (exp == 0) {
|
|
/* RSA_F4 0x10001 */
|
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BN_set_bit(e, 0);
|
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BN_set_bit(e, 16);
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} else {
|
|
/* (phased-out) F5 0x100000001 */
|
|
BN_set_bit(e, 0);
|
|
BN_set_bit(e, 32);
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}
|
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|
|
if (callback == NULL) {
|
|
BN_GENCB_set_old(cb, NULL, NULL);
|
|
} else {
|
|
u.fptr = callback;
|
|
BN_GENCB_set(cb, progress_cb, u.dptr);
|
|
}
|
|
|
|
if (RSA_generate_key_ex(rsa, key->key_size, e, cb)) {
|
|
BN_free(e);
|
|
BN_GENCB_free(cb);
|
|
cb = NULL;
|
|
key->keydata.pkey = pkey;
|
|
|
|
RSA_free(rsa);
|
|
return (ISC_R_SUCCESS);
|
|
}
|
|
ret = dst__openssl_toresult2("RSA_generate_key_ex",
|
|
DST_R_OPENSSLFAILURE);
|
|
|
|
err:
|
|
if (pkey != NULL) {
|
|
EVP_PKEY_free(pkey);
|
|
pkey = NULL;
|
|
}
|
|
if (e != NULL) {
|
|
BN_free(e);
|
|
e = NULL;
|
|
}
|
|
if (rsa != NULL) {
|
|
RSA_free(rsa);
|
|
rsa = NULL;
|
|
}
|
|
if (cb != NULL) {
|
|
BN_GENCB_free(cb);
|
|
cb = NULL;
|
|
}
|
|
return (dst__openssl_toresult(ret));
|
|
}
|
|
|
|
static bool
|
|
opensslrsa_isprivate(const dst_key_t *key) {
|
|
const BIGNUM *d = NULL;
|
|
RSA *rsa = EVP_PKEY_get1_RSA(key->keydata.pkey);
|
|
INSIST(rsa != NULL);
|
|
RSA_free(rsa);
|
|
/* key->keydata.pkey still has a reference so rsa is still valid. */
|
|
if (rsa != NULL && RSA_test_flags(rsa, RSA_FLAG_EXT_PKEY) != 0) {
|
|
return (true);
|
|
}
|
|
RSA_get0_key(rsa, NULL, NULL, &d);
|
|
return (rsa != NULL && d != NULL);
|
|
}
|
|
|
|
static void
|
|
opensslrsa_destroy(dst_key_t *key) {
|
|
EVP_PKEY *pkey = key->keydata.pkey;
|
|
EVP_PKEY_free(pkey);
|
|
key->keydata.pkey = NULL;
|
|
}
|
|
|
|
static isc_result_t
|
|
opensslrsa_todns(const dst_key_t *key, isc_buffer_t *data) {
|
|
isc_region_t r;
|
|
unsigned int e_bytes;
|
|
unsigned int mod_bytes;
|
|
isc_result_t ret;
|
|
RSA *rsa;
|
|
EVP_PKEY *pkey;
|
|
const BIGNUM *e = NULL, *n = NULL;
|
|
|
|
REQUIRE(key->keydata.pkey != NULL);
|
|
|
|
pkey = key->keydata.pkey;
|
|
rsa = EVP_PKEY_get1_RSA(pkey);
|
|
if (rsa == NULL) {
|
|
return (dst__openssl_toresult(DST_R_OPENSSLFAILURE));
|
|
}
|
|
|
|
isc_buffer_availableregion(data, &r);
|
|
|
|
RSA_get0_key(rsa, &n, &e, NULL);
|
|
mod_bytes = BN_num_bytes(n);
|
|
e_bytes = BN_num_bytes(e);
|
|
|
|
if (e_bytes < 256) { /*%< key exponent is <= 2040 bits */
|
|
if (r.length < 1) {
|
|
DST_RET(ISC_R_NOSPACE);
|
|
}
|
|
isc_buffer_putuint8(data, (uint8_t)e_bytes);
|
|
isc_region_consume(&r, 1);
|
|
} else {
|
|
if (r.length < 3) {
|
|
DST_RET(ISC_R_NOSPACE);
|
|
}
|
|
isc_buffer_putuint8(data, 0);
|
|
isc_buffer_putuint16(data, (uint16_t)e_bytes);
|
|
isc_region_consume(&r, 3);
|
|
}
|
|
|
|
if (r.length < e_bytes + mod_bytes) {
|
|
DST_RET(ISC_R_NOSPACE);
|
|
}
|
|
|
|
RSA_get0_key(rsa, &n, &e, NULL);
|
|
BN_bn2bin(e, r.base);
|
|
isc_region_consume(&r, e_bytes);
|
|
BN_bn2bin(n, r.base);
|
|
|
|
isc_buffer_add(data, e_bytes + mod_bytes);
|
|
|
|
ret = ISC_R_SUCCESS;
|
|
err:
|
|
RSA_free(rsa);
|
|
return (ret);
|
|
}
|
|
|
|
static isc_result_t
|
|
opensslrsa_fromdns(dst_key_t *key, isc_buffer_t *data) {
|
|
RSA *rsa;
|
|
isc_region_t r;
|
|
unsigned int e_bytes;
|
|
unsigned int length;
|
|
EVP_PKEY *pkey;
|
|
BIGNUM *e = NULL, *n = NULL;
|
|
|
|
isc_buffer_remainingregion(data, &r);
|
|
if (r.length == 0) {
|
|
return (ISC_R_SUCCESS);
|
|
}
|
|
length = r.length;
|
|
|
|
rsa = RSA_new();
|
|
if (rsa == NULL) {
|
|
return (dst__openssl_toresult(ISC_R_NOMEMORY));
|
|
}
|
|
|
|
if (r.length < 1) {
|
|
RSA_free(rsa);
|
|
return (DST_R_INVALIDPUBLICKEY);
|
|
}
|
|
e_bytes = *r.base;
|
|
isc_region_consume(&r, 1);
|
|
|
|
if (e_bytes == 0) {
|
|
if (r.length < 2) {
|
|
RSA_free(rsa);
|
|
return (DST_R_INVALIDPUBLICKEY);
|
|
}
|
|
e_bytes = (*r.base) << 8;
|
|
isc_region_consume(&r, 1);
|
|
e_bytes += *r.base;
|
|
isc_region_consume(&r, 1);
|
|
}
|
|
|
|
if (r.length < e_bytes) {
|
|
RSA_free(rsa);
|
|
return (DST_R_INVALIDPUBLICKEY);
|
|
}
|
|
e = BN_bin2bn(r.base, e_bytes, NULL);
|
|
isc_region_consume(&r, e_bytes);
|
|
n = BN_bin2bn(r.base, r.length, NULL);
|
|
if (RSA_set0_key(rsa, n, e, NULL) == 0) {
|
|
if (n != NULL) {
|
|
BN_free(n);
|
|
}
|
|
if (e != NULL) {
|
|
BN_free(e);
|
|
}
|
|
RSA_free(rsa);
|
|
return (ISC_R_NOMEMORY);
|
|
}
|
|
key->key_size = BN_num_bits(n);
|
|
|
|
isc_buffer_forward(data, length);
|
|
|
|
pkey = EVP_PKEY_new();
|
|
if (pkey == NULL) {
|
|
RSA_free(rsa);
|
|
return (ISC_R_NOMEMORY);
|
|
}
|
|
if (!EVP_PKEY_set1_RSA(pkey, rsa)) {
|
|
EVP_PKEY_free(pkey);
|
|
RSA_free(rsa);
|
|
return (dst__openssl_toresult(DST_R_OPENSSLFAILURE));
|
|
}
|
|
key->keydata.pkey = pkey;
|
|
RSA_free(rsa);
|
|
|
|
return (ISC_R_SUCCESS);
|
|
}
|
|
|
|
static isc_result_t
|
|
opensslrsa_tofile(const dst_key_t *key, const char *directory) {
|
|
int i;
|
|
RSA *rsa;
|
|
dst_private_t priv;
|
|
unsigned char *bufs[8];
|
|
isc_result_t result;
|
|
const BIGNUM *n = NULL, *e = NULL, *d = NULL;
|
|
const BIGNUM *p = NULL, *q = NULL;
|
|
const BIGNUM *dmp1 = NULL, *dmq1 = NULL, *iqmp = NULL;
|
|
|
|
if (key->external) {
|
|
priv.nelements = 0;
|
|
return (dst__privstruct_writefile(key, &priv, directory));
|
|
}
|
|
|
|
if (key->keydata.pkey == NULL) {
|
|
return (DST_R_NULLKEY);
|
|
}
|
|
rsa = EVP_PKEY_get1_RSA(key->keydata.pkey);
|
|
if (rsa == NULL) {
|
|
return (dst__openssl_toresult(DST_R_OPENSSLFAILURE));
|
|
}
|
|
memset(bufs, 0, sizeof(bufs));
|
|
|
|
RSA_get0_key(rsa, &n, &e, &d);
|
|
RSA_get0_factors(rsa, &p, &q);
|
|
RSA_get0_crt_params(rsa, &dmp1, &dmq1, &iqmp);
|
|
|
|
for (i = 0; i < 8; i++) {
|
|
bufs[i] = isc_mem_get(key->mctx, BN_num_bytes(n));
|
|
}
|
|
|
|
i = 0;
|
|
|
|
priv.elements[i].tag = TAG_RSA_MODULUS;
|
|
priv.elements[i].length = BN_num_bytes(n);
|
|
BN_bn2bin(n, bufs[i]);
|
|
priv.elements[i].data = bufs[i];
|
|
i++;
|
|
|
|
priv.elements[i].tag = TAG_RSA_PUBLICEXPONENT;
|
|
priv.elements[i].length = BN_num_bytes(e);
|
|
BN_bn2bin(e, bufs[i]);
|
|
priv.elements[i].data = bufs[i];
|
|
i++;
|
|
|
|
if (d != NULL) {
|
|
priv.elements[i].tag = TAG_RSA_PRIVATEEXPONENT;
|
|
priv.elements[i].length = BN_num_bytes(d);
|
|
BN_bn2bin(d, bufs[i]);
|
|
priv.elements[i].data = bufs[i];
|
|
i++;
|
|
}
|
|
|
|
if (p != NULL) {
|
|
priv.elements[i].tag = TAG_RSA_PRIME1;
|
|
priv.elements[i].length = BN_num_bytes(p);
|
|
BN_bn2bin(p, bufs[i]);
|
|
priv.elements[i].data = bufs[i];
|
|
i++;
|
|
}
|
|
|
|
if (q != NULL) {
|
|
priv.elements[i].tag = TAG_RSA_PRIME2;
|
|
priv.elements[i].length = BN_num_bytes(q);
|
|
BN_bn2bin(q, bufs[i]);
|
|
priv.elements[i].data = bufs[i];
|
|
i++;
|
|
}
|
|
|
|
if (dmp1 != NULL) {
|
|
priv.elements[i].tag = TAG_RSA_EXPONENT1;
|
|
priv.elements[i].length = BN_num_bytes(dmp1);
|
|
BN_bn2bin(dmp1, bufs[i]);
|
|
priv.elements[i].data = bufs[i];
|
|
i++;
|
|
}
|
|
|
|
if (dmq1 != NULL) {
|
|
priv.elements[i].tag = TAG_RSA_EXPONENT2;
|
|
priv.elements[i].length = BN_num_bytes(dmq1);
|
|
BN_bn2bin(dmq1, bufs[i]);
|
|
priv.elements[i].data = bufs[i];
|
|
i++;
|
|
}
|
|
|
|
if (iqmp != NULL) {
|
|
priv.elements[i].tag = TAG_RSA_COEFFICIENT;
|
|
priv.elements[i].length = BN_num_bytes(iqmp);
|
|
BN_bn2bin(iqmp, bufs[i]);
|
|
priv.elements[i].data = bufs[i];
|
|
i++;
|
|
}
|
|
|
|
if (key->engine != NULL) {
|
|
priv.elements[i].tag = TAG_RSA_ENGINE;
|
|
priv.elements[i].length = (unsigned short)strlen(key->engine) +
|
|
1;
|
|
priv.elements[i].data = (unsigned char *)key->engine;
|
|
i++;
|
|
}
|
|
|
|
if (key->label != NULL) {
|
|
priv.elements[i].tag = TAG_RSA_LABEL;
|
|
priv.elements[i].length = (unsigned short)strlen(key->label) +
|
|
1;
|
|
priv.elements[i].data = (unsigned char *)key->label;
|
|
i++;
|
|
}
|
|
|
|
priv.nelements = i;
|
|
result = dst__privstruct_writefile(key, &priv, directory);
|
|
|
|
RSA_free(rsa);
|
|
for (i = 0; i < 8; i++) {
|
|
if (bufs[i] == NULL) {
|
|
break;
|
|
}
|
|
isc_mem_put(key->mctx, bufs[i], BN_num_bytes(n));
|
|
}
|
|
return (result);
|
|
}
|
|
|
|
static isc_result_t
|
|
rsa_check(RSA *rsa, RSA *pub) {
|
|
const BIGNUM *n1 = NULL, *n2 = NULL;
|
|
const BIGNUM *e1 = NULL, *e2 = NULL;
|
|
BIGNUM *n = NULL, *e = NULL;
|
|
|
|
/*
|
|
* Public parameters should be the same but if they are not set
|
|
* copy them from the public key.
|
|
*/
|
|
RSA_get0_key(rsa, &n1, &e1, NULL);
|
|
if (pub != NULL) {
|
|
RSA_get0_key(pub, &n2, &e2, NULL);
|
|
if (n1 != NULL) {
|
|
if (BN_cmp(n1, n2) != 0) {
|
|
return (DST_R_INVALIDPRIVATEKEY);
|
|
}
|
|
} else {
|
|
n = BN_dup(n2);
|
|
}
|
|
if (e1 != NULL) {
|
|
if (BN_cmp(e1, e2) != 0) {
|
|
return (DST_R_INVALIDPRIVATEKEY);
|
|
}
|
|
} else {
|
|
e = BN_dup(e2);
|
|
}
|
|
if (RSA_set0_key(rsa, n, e, NULL) == 0) {
|
|
if (n != NULL) {
|
|
BN_free(n);
|
|
}
|
|
if (e != NULL) {
|
|
BN_free(e);
|
|
}
|
|
}
|
|
}
|
|
RSA_get0_key(rsa, &n1, &e1, NULL);
|
|
if (n1 == NULL || e1 == NULL) {
|
|
return (DST_R_INVALIDPRIVATEKEY);
|
|
}
|
|
return (ISC_R_SUCCESS);
|
|
}
|
|
|
|
static isc_result_t
|
|
opensslrsa_parse(dst_key_t *key, isc_lex_t *lexer, dst_key_t *pub) {
|
|
dst_private_t priv;
|
|
isc_result_t ret;
|
|
int i;
|
|
RSA *rsa = NULL, *pubrsa = NULL;
|
|
#if !defined(OPENSSL_NO_ENGINE)
|
|
ENGINE *ep = NULL;
|
|
const BIGNUM *ex = NULL;
|
|
#endif /* if !defined(OPENSSL_NO_ENGINE) */
|
|
isc_mem_t *mctx = key->mctx;
|
|
const char *engine = NULL, *label = NULL;
|
|
EVP_PKEY *pkey = NULL;
|
|
BIGNUM *n = NULL, *e = NULL, *d = NULL;
|
|
BIGNUM *p = NULL, *q = NULL;
|
|
BIGNUM *dmp1 = NULL, *dmq1 = NULL, *iqmp = NULL;
|
|
|
|
/* read private key file */
|
|
ret = dst__privstruct_parse(key, DST_ALG_RSA, lexer, mctx, &priv);
|
|
if (ret != ISC_R_SUCCESS) {
|
|
goto err;
|
|
}
|
|
|
|
if (key->external) {
|
|
if (priv.nelements != 0) {
|
|
DST_RET(DST_R_INVALIDPRIVATEKEY);
|
|
}
|
|
if (pub == NULL) {
|
|
DST_RET(DST_R_INVALIDPRIVATEKEY);
|
|
}
|
|
key->keydata.pkey = pub->keydata.pkey;
|
|
pub->keydata.pkey = NULL;
|
|
key->key_size = pub->key_size;
|
|
dst__privstruct_free(&priv, mctx);
|
|
isc_safe_memwipe(&priv, sizeof(priv));
|
|
return (ISC_R_SUCCESS);
|
|
}
|
|
|
|
if (pub != NULL && pub->keydata.pkey != NULL) {
|
|
pubrsa = EVP_PKEY_get1_RSA(pub->keydata.pkey);
|
|
}
|
|
|
|
for (i = 0; i < priv.nelements; i++) {
|
|
switch (priv.elements[i].tag) {
|
|
case TAG_RSA_ENGINE:
|
|
engine = (char *)priv.elements[i].data;
|
|
break;
|
|
case TAG_RSA_LABEL:
|
|
label = (char *)priv.elements[i].data;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Is this key is stored in a HSM?
|
|
* See if we can fetch it.
|
|
*/
|
|
if (label != NULL) {
|
|
#if !defined(OPENSSL_NO_ENGINE)
|
|
if (engine == NULL) {
|
|
DST_RET(DST_R_NOENGINE);
|
|
}
|
|
ep = dst__openssl_getengine(engine);
|
|
if (ep == NULL) {
|
|
DST_RET(DST_R_NOENGINE);
|
|
}
|
|
pkey = ENGINE_load_private_key(ep, label, NULL, NULL);
|
|
if (pkey == NULL) {
|
|
DST_RET(dst__openssl_toresult2("ENGINE_load_private_"
|
|
"key",
|
|
ISC_R_NOTFOUND));
|
|
}
|
|
key->engine = isc_mem_strdup(key->mctx, engine);
|
|
key->label = isc_mem_strdup(key->mctx, label);
|
|
rsa = EVP_PKEY_get1_RSA(pkey);
|
|
if (rsa == NULL) {
|
|
DST_RET(dst__openssl_toresult(DST_R_OPENSSLFAILURE));
|
|
}
|
|
if (rsa_check(rsa, pubrsa) != ISC_R_SUCCESS) {
|
|
DST_RET(DST_R_INVALIDPRIVATEKEY);
|
|
}
|
|
RSA_get0_key(rsa, NULL, &ex, NULL);
|
|
if (BN_num_bits(ex) > RSA_MAX_PUBEXP_BITS) {
|
|
DST_RET(ISC_R_RANGE);
|
|
}
|
|
if (pubrsa != NULL) {
|
|
RSA_free(pubrsa);
|
|
}
|
|
key->key_size = EVP_PKEY_bits(pkey);
|
|
key->keydata.pkey = pkey;
|
|
RSA_free(rsa);
|
|
dst__privstruct_free(&priv, mctx);
|
|
isc_safe_memwipe(&priv, sizeof(priv));
|
|
return (ISC_R_SUCCESS);
|
|
#else /* if !defined(OPENSSL_NO_ENGINE) */
|
|
DST_RET(DST_R_NOENGINE);
|
|
#endif /* if !defined(OPENSSL_NO_ENGINE) */
|
|
}
|
|
|
|
rsa = RSA_new();
|
|
if (rsa == NULL) {
|
|
DST_RET(ISC_R_NOMEMORY);
|
|
}
|
|
|
|
pkey = EVP_PKEY_new();
|
|
if (pkey == NULL) {
|
|
DST_RET(ISC_R_NOMEMORY);
|
|
}
|
|
if (!EVP_PKEY_set1_RSA(pkey, rsa)) {
|
|
DST_RET(ISC_R_FAILURE);
|
|
}
|
|
key->keydata.pkey = pkey;
|
|
|
|
for (i = 0; i < priv.nelements; i++) {
|
|
BIGNUM *bn;
|
|
switch (priv.elements[i].tag) {
|
|
case TAG_RSA_ENGINE:
|
|
continue;
|
|
case TAG_RSA_LABEL:
|
|
continue;
|
|
default:
|
|
bn = BN_bin2bn(priv.elements[i].data,
|
|
priv.elements[i].length, NULL);
|
|
if (bn == NULL) {
|
|
DST_RET(ISC_R_NOMEMORY);
|
|
}
|
|
switch (priv.elements[i].tag) {
|
|
case TAG_RSA_MODULUS:
|
|
n = bn;
|
|
break;
|
|
case TAG_RSA_PUBLICEXPONENT:
|
|
e = bn;
|
|
break;
|
|
case TAG_RSA_PRIVATEEXPONENT:
|
|
d = bn;
|
|
break;
|
|
case TAG_RSA_PRIME1:
|
|
p = bn;
|
|
break;
|
|
case TAG_RSA_PRIME2:
|
|
q = bn;
|
|
break;
|
|
case TAG_RSA_EXPONENT1:
|
|
dmp1 = bn;
|
|
break;
|
|
case TAG_RSA_EXPONENT2:
|
|
dmq1 = bn;
|
|
break;
|
|
case TAG_RSA_COEFFICIENT:
|
|
iqmp = bn;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
dst__privstruct_free(&priv, mctx);
|
|
isc_safe_memwipe(&priv, sizeof(priv));
|
|
|
|
if (RSA_set0_key(rsa, n, e, d) == 0) {
|
|
if (n != NULL) {
|
|
BN_free(n);
|
|
}
|
|
if (e != NULL) {
|
|
BN_free(e);
|
|
}
|
|
if (d != NULL) {
|
|
BN_free(d);
|
|
}
|
|
}
|
|
if (RSA_set0_factors(rsa, p, q) == 0) {
|
|
if (p != NULL) {
|
|
BN_free(p);
|
|
}
|
|
if (q != NULL) {
|
|
BN_free(q);
|
|
}
|
|
}
|
|
if (RSA_set0_crt_params(rsa, dmp1, dmq1, iqmp) == 0) {
|
|
if (dmp1 != NULL) {
|
|
BN_free(dmp1);
|
|
}
|
|
if (dmq1 != NULL) {
|
|
BN_free(dmq1);
|
|
}
|
|
if (iqmp != NULL) {
|
|
BN_free(iqmp);
|
|
}
|
|
}
|
|
|
|
if (rsa_check(rsa, pubrsa) != ISC_R_SUCCESS) {
|
|
DST_RET(DST_R_INVALIDPRIVATEKEY);
|
|
}
|
|
if (BN_num_bits(e) > RSA_MAX_PUBEXP_BITS) {
|
|
DST_RET(ISC_R_RANGE);
|
|
}
|
|
key->key_size = BN_num_bits(n);
|
|
if (pubrsa != NULL) {
|
|
RSA_free(pubrsa);
|
|
}
|
|
RSA_free(rsa);
|
|
|
|
return (ISC_R_SUCCESS);
|
|
|
|
err:
|
|
if (pkey != NULL) {
|
|
EVP_PKEY_free(pkey);
|
|
}
|
|
if (rsa != NULL) {
|
|
RSA_free(rsa);
|
|
}
|
|
if (pubrsa != NULL) {
|
|
RSA_free(pubrsa);
|
|
}
|
|
key->keydata.generic = NULL;
|
|
dst__privstruct_free(&priv, mctx);
|
|
isc_safe_memwipe(&priv, sizeof(priv));
|
|
return (ret);
|
|
}
|
|
|
|
static isc_result_t
|
|
opensslrsa_fromlabel(dst_key_t *key, const char *engine, const char *label,
|
|
const char *pin) {
|
|
#if !defined(OPENSSL_NO_ENGINE)
|
|
ENGINE *e = NULL;
|
|
isc_result_t ret;
|
|
EVP_PKEY *pkey = NULL;
|
|
RSA *rsa = NULL, *pubrsa = NULL;
|
|
const BIGNUM *ex = NULL;
|
|
|
|
UNUSED(pin);
|
|
|
|
if (engine == NULL) {
|
|
DST_RET(DST_R_NOENGINE);
|
|
}
|
|
e = dst__openssl_getengine(engine);
|
|
if (e == NULL) {
|
|
DST_RET(DST_R_NOENGINE);
|
|
}
|
|
pkey = ENGINE_load_public_key(e, label, NULL, NULL);
|
|
if (pkey != NULL) {
|
|
pubrsa = EVP_PKEY_get1_RSA(pkey);
|
|
EVP_PKEY_free(pkey);
|
|
if (pubrsa == NULL) {
|
|
DST_RET(dst__openssl_toresult(DST_R_OPENSSLFAILURE));
|
|
}
|
|
}
|
|
pkey = ENGINE_load_private_key(e, label, NULL, NULL);
|
|
if (pkey == NULL) {
|
|
DST_RET(dst__openssl_toresult2("ENGINE_load_private_key",
|
|
ISC_R_NOTFOUND));
|
|
}
|
|
key->engine = isc_mem_strdup(key->mctx, engine);
|
|
key->label = isc_mem_strdup(key->mctx, label);
|
|
rsa = EVP_PKEY_get1_RSA(pkey);
|
|
if (rsa == NULL) {
|
|
DST_RET(dst__openssl_toresult(DST_R_OPENSSLFAILURE));
|
|
}
|
|
if (rsa_check(rsa, pubrsa) != ISC_R_SUCCESS) {
|
|
DST_RET(DST_R_INVALIDPRIVATEKEY);
|
|
}
|
|
RSA_get0_key(rsa, NULL, &ex, NULL);
|
|
if (BN_num_bits(ex) > RSA_MAX_PUBEXP_BITS) {
|
|
DST_RET(ISC_R_RANGE);
|
|
}
|
|
if (pubrsa != NULL) {
|
|
RSA_free(pubrsa);
|
|
}
|
|
key->key_size = EVP_PKEY_bits(pkey);
|
|
key->keydata.pkey = pkey;
|
|
RSA_free(rsa);
|
|
return (ISC_R_SUCCESS);
|
|
|
|
err:
|
|
if (rsa != NULL) {
|
|
RSA_free(rsa);
|
|
}
|
|
if (pubrsa != NULL) {
|
|
RSA_free(pubrsa);
|
|
}
|
|
if (pkey != NULL) {
|
|
EVP_PKEY_free(pkey);
|
|
}
|
|
return (ret);
|
|
#else /* if !defined(OPENSSL_NO_ENGINE) */
|
|
UNUSED(key);
|
|
UNUSED(engine);
|
|
UNUSED(label);
|
|
UNUSED(pin);
|
|
return (DST_R_NOENGINE);
|
|
#endif /* if !defined(OPENSSL_NO_ENGINE) */
|
|
}
|
|
|
|
static dst_func_t opensslrsa_functions = {
|
|
opensslrsa_createctx,
|
|
NULL, /*%< createctx2 */
|
|
opensslrsa_destroyctx,
|
|
opensslrsa_adddata,
|
|
opensslrsa_sign,
|
|
opensslrsa_verify,
|
|
opensslrsa_verify2,
|
|
NULL, /*%< computesecret */
|
|
opensslrsa_compare,
|
|
NULL, /*%< paramcompare */
|
|
opensslrsa_generate,
|
|
opensslrsa_isprivate,
|
|
opensslrsa_destroy,
|
|
opensslrsa_todns,
|
|
opensslrsa_fromdns,
|
|
opensslrsa_tofile,
|
|
opensslrsa_parse,
|
|
NULL, /*%< cleanup */
|
|
opensslrsa_fromlabel,
|
|
NULL, /*%< dump */
|
|
NULL, /*%< restore */
|
|
};
|
|
|
|
isc_result_t
|
|
dst__opensslrsa_init(dst_func_t **funcp, unsigned char algorithm) {
|
|
REQUIRE(funcp != NULL);
|
|
|
|
UNUSED(algorithm);
|
|
|
|
if (*funcp == NULL) {
|
|
*funcp = &opensslrsa_functions;
|
|
}
|
|
return (ISC_R_SUCCESS);
|
|
}
|