summaryrefslogtreecommitdiffstats
path: root/lib/dns/openssldh_link.c
diff options
context:
space:
mode:
Diffstat (limited to 'lib/dns/openssldh_link.c')
-rw-r--r--lib/dns/openssldh_link.c793
1 files changed, 793 insertions, 0 deletions
diff --git a/lib/dns/openssldh_link.c b/lib/dns/openssldh_link.c
new file mode 100644
index 0000000..e8a3f7e
--- /dev/null
+++ b/lib/dns/openssldh_link.c
@@ -0,0 +1,793 @@
+/*
+ * Portions Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ *
+ * Portions Copyright (C) Network Associates, Inc.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND ISC AND NETWORK ASSOCIATES DISCLAIMS
+ * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE
+ * FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
+ * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifdef OPENSSL
+
+#include <config.h>
+
+#include <pk11/site.h>
+
+#ifndef PK11_DH_DISABLE
+
+#include <ctype.h>
+#include <inttypes.h>
+#include <stdbool.h>
+
+#include <isc/mem.h>
+#include <isc/safe.h>
+#include <isc/string.h>
+#include <isc/util.h>
+
+#include <dst/result.h>
+
+#include <openssl/opensslv.h>
+
+#include "dst_internal.h"
+#include "dst_openssl.h"
+#include "dst_parse.h"
+
+#define PRIME2 "02"
+
+#define PRIME768 "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E088" \
+ "A67CC74020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B302B0A6DF25" \
+ "F14374FE1356D6D51C245E485B576625E7EC6F44C42E9A63A3620FFFFFFFFFFFFFFFF"
+
+#define PRIME1024 "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E08" \
+ "8A67CC74020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B302B0A6DF2" \
+ "5F14374FE1356D6D51C245E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406" \
+ "B7EDEE386BFB5A899FA5AE9F24117C4B1FE649286651ECE65381FFFFFFFFFFFFFFFF"
+
+#define PRIME1536 "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1" \
+ "29024E088A67CC74020BBEA63B139B22514A08798E3404DD" \
+ "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245" \
+ "E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED" \
+ "EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE45B3D" \
+ "C2007CB8A163BF0598DA48361C55D39A69163FA8FD24CF5F" \
+ "83655D23DCA3AD961C62F356208552BB9ED529077096966D" \
+ "670C354E4ABC9804F1746C08CA237327FFFFFFFFFFFFFFFF"
+
+
+static isc_result_t openssldh_todns(const dst_key_t *key, isc_buffer_t *data);
+
+static BIGNUM *bn2 = NULL, *bn768 = NULL, *bn1024 = NULL, *bn1536 = NULL;
+
+#if !defined(HAVE_DH_GET0_KEY)
+/*
+ * DH_get0_key, DH_set0_key, DH_get0_pqg and DH_set0_pqg
+ * are from OpenSSL 1.1.0.
+ */
+static void
+DH_get0_key(const DH *dh, const BIGNUM **pub_key, const BIGNUM **priv_key) {
+ if (pub_key != NULL) {
+ *pub_key = dh->pub_key;
+ }
+ if (priv_key != NULL) {
+ *priv_key = dh->priv_key;
+ }
+}
+
+static int
+DH_set0_key(DH *dh, BIGNUM *pub_key, BIGNUM *priv_key) {
+ if (pub_key != NULL) {
+ BN_free(dh->pub_key);
+ dh->pub_key = pub_key;
+ }
+
+ if (priv_key != NULL) {
+ BN_free(dh->priv_key);
+ dh->priv_key = priv_key;
+ }
+
+ return (1);
+}
+
+static void
+DH_get0_pqg(const DH *dh,
+ const BIGNUM **p, const BIGNUM **q, const BIGNUM **g)
+{
+ if (p != NULL) {
+ *p = dh->p;
+ }
+ if (q != NULL) {
+ *q = dh->q;
+ }
+ if (g != NULL) {
+ *g = dh->g;
+ }
+}
+
+static int
+DH_set0_pqg(DH *dh, BIGNUM *p, BIGNUM *q, BIGNUM *g)
+{
+ /* If the fields p and g in d are NULL, the corresponding input
+ * parameters MUST be non-NULL. q may remain NULL.
+ */
+ if ((dh->p == NULL && p == NULL)
+ || (dh->g == NULL && g == NULL))
+ {
+ return 0;
+ }
+
+ if (p != NULL) {
+ BN_free(dh->p);
+ dh->p = p;
+ }
+ if (q != NULL) {
+ BN_free(dh->q);
+ dh->q = q;
+ }
+ if (g != NULL) {
+ BN_free(dh->g);
+ dh->g = g;
+ }
+
+ if (q != NULL) {
+ dh->length = BN_num_bits(q);
+ }
+
+ return (1);
+}
+
+#define DH_clear_flags(d, f) (d)->flags &= ~(f)
+
+#endif
+
+static isc_result_t
+openssldh_computesecret(const dst_key_t *pub, const dst_key_t *priv,
+ isc_buffer_t *secret)
+{
+ DH *dhpub, *dhpriv;
+ const BIGNUM *pub_key = NULL;
+ int ret;
+ isc_region_t r;
+ unsigned int len;
+
+ REQUIRE(pub->keydata.dh != NULL);
+ REQUIRE(priv->keydata.dh != NULL);
+
+ dhpub = pub->keydata.dh;
+ dhpriv = priv->keydata.dh;
+
+ len = DH_size(dhpriv);
+ isc_buffer_availableregion(secret, &r);
+ if (r.length < len)
+ return (ISC_R_NOSPACE);
+
+ DH_get0_key(dhpub, &pub_key, NULL);
+ ret = DH_compute_key(r.base, pub_key, dhpriv);
+ if (ret <= 0)
+ return (dst__openssl_toresult2("DH_compute_key",
+ DST_R_COMPUTESECRETFAILURE));
+ isc_buffer_add(secret, len);
+ return (ISC_R_SUCCESS);
+}
+
+static bool
+openssldh_compare(const dst_key_t *key1, const dst_key_t *key2) {
+ DH *dh1, *dh2;
+ const BIGNUM *pub_key1 = NULL, *pub_key2 = NULL;
+ const BIGNUM *priv_key1 = NULL, *priv_key2 = NULL;
+ const BIGNUM *p1 = NULL, *g1 = NULL, *p2 = NULL, *g2 = NULL;
+
+ dh1 = key1->keydata.dh;
+ dh2 = key2->keydata.dh;
+
+ if (dh1 == NULL && dh2 == NULL)
+ return (true);
+ else if (dh1 == NULL || dh2 == NULL)
+ return (false);
+
+ DH_get0_key(dh1, &pub_key1, &priv_key1);
+ DH_get0_key(dh2, &pub_key2, &priv_key2);
+ DH_get0_pqg(dh1, &p1, NULL, &g1);
+ DH_get0_pqg(dh2, &p2, NULL, &g2);
+
+ if (BN_cmp(p1, p2) != 0 || BN_cmp(g1, g2) != 0 ||
+ BN_cmp(pub_key1, pub_key2) != 0)
+ return (false);
+
+ if (priv_key1 != NULL || priv_key2 != NULL) {
+ if (priv_key1 == NULL || priv_key2 == NULL)
+ return (false);
+ if (BN_cmp(priv_key1, priv_key2) != 0)
+ return (false);
+ }
+ return (true);
+}
+
+static bool
+openssldh_paramcompare(const dst_key_t *key1, const dst_key_t *key2) {
+ DH *dh1, *dh2;
+ const BIGNUM *p1 = NULL, *g1 = NULL, *p2 = NULL, *g2 = NULL;
+
+ dh1 = key1->keydata.dh;
+ dh2 = key2->keydata.dh;
+
+ if (dh1 == NULL && dh2 == NULL)
+ return (true);
+ else if (dh1 == NULL || dh2 == NULL)
+ return (false);
+
+ DH_get0_pqg(dh1, &p1, NULL, &g1);
+ DH_get0_pqg(dh2, &p2, NULL, &g2);
+
+ if (BN_cmp(p1, p2) != 0 || BN_cmp(g1, g2) != 0)
+ return (false);
+ return (true);
+}
+
+#if OPENSSL_VERSION_NUMBER > 0x00908000L
+static int
+progress_cb(int p, int n, BN_GENCB *cb) {
+ union {
+ void *dptr;
+ void (*fptr)(int);
+ } u;
+
+ UNUSED(n);
+
+ u.dptr = BN_GENCB_get_arg(cb);
+ if (u.fptr != NULL)
+ u.fptr(p);
+ return (1);
+}
+#endif
+
+static isc_result_t
+openssldh_generate(dst_key_t *key, int generator, void (*callback)(int)) {
+ DH *dh = NULL;
+#if OPENSSL_VERSION_NUMBER > 0x00908000L
+ BN_GENCB *cb;
+#if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)
+ BN_GENCB _cb;
+#endif
+ union {
+ void *dptr;
+ void (*fptr)(int);
+ } u;
+#else
+
+ UNUSED(callback);
+#endif
+
+ if (generator == 0) {
+ if (key->key_size == 768 ||
+ key->key_size == 1024 ||
+ key->key_size == 1536)
+ {
+ BIGNUM *p, *g;
+ dh = DH_new();
+ if (key->key_size == 768)
+ p = BN_dup(bn768);
+ else if (key->key_size == 1024)
+ p = BN_dup(bn1024);
+ else
+ p = BN_dup(bn1536);
+ g = BN_dup(bn2);
+ if (dh == NULL || p == NULL || g == NULL) {
+ if (dh != NULL)
+ DH_free(dh);
+ if (p != NULL)
+ BN_free(p);
+ if (g != NULL)
+ BN_free(g);
+ return (dst__openssl_toresult(ISC_R_NOMEMORY));
+ }
+ DH_set0_pqg(dh, p, NULL, g);
+ } else
+ generator = 2;
+ }
+
+ if (generator != 0) {
+#if OPENSSL_VERSION_NUMBER > 0x00908000L
+ dh = DH_new();
+ if (dh == NULL)
+ return (dst__openssl_toresult(ISC_R_NOMEMORY));
+ cb = BN_GENCB_new();
+#if OPENSSL_VERSION_NUMBER >= 0x10100000L && !defined(LIBRESSL_VERSION_NUMBER)
+ if (cb == NULL) {
+ DH_free(dh);
+ return (dst__openssl_toresult(ISC_R_NOMEMORY));
+ }
+#endif
+ if (callback == NULL) {
+ BN_GENCB_set_old(cb, NULL, NULL);
+ } else {
+ u.fptr = callback;
+ BN_GENCB_set(cb, &progress_cb, u.dptr);
+ }
+
+ if (!DH_generate_parameters_ex(dh, key->key_size, generator,
+ cb)) {
+ DH_free(dh);
+ BN_GENCB_free(cb);
+ return (dst__openssl_toresult2(
+ "DH_generate_parameters_ex",
+ DST_R_OPENSSLFAILURE));
+ }
+ BN_GENCB_free(cb);
+ cb = NULL;
+#else
+ dh = DH_generate_parameters(key->key_size, generator,
+ NULL, NULL);
+ if (dh == NULL)
+ return (dst__openssl_toresult2(
+ "DH_generate_parameters",
+ DST_R_OPENSSLFAILURE));
+#endif
+ }
+
+ if (DH_generate_key(dh) == 0) {
+ DH_free(dh);
+ return (dst__openssl_toresult2("DH_generate_key",
+ DST_R_OPENSSLFAILURE));
+ }
+ DH_clear_flags(dh, DH_FLAG_CACHE_MONT_P);
+ key->keydata.dh = dh;
+
+ return (ISC_R_SUCCESS);
+}
+
+static bool
+openssldh_isprivate(const dst_key_t *key) {
+ DH *dh = key->keydata.dh;
+ const BIGNUM *priv_key = NULL;
+
+ DH_get0_key(dh, NULL, &priv_key);
+ return (dh != NULL && priv_key != NULL);
+}
+
+static void
+openssldh_destroy(dst_key_t *key) {
+ DH *dh = key->keydata.dh;
+
+ if (dh == NULL)
+ return;
+
+ DH_free(dh);
+ key->keydata.dh = NULL;
+}
+
+static void
+uint16_toregion(uint16_t val, isc_region_t *region) {
+ *region->base = (val & 0xff00) >> 8;
+ isc_region_consume(region, 1);
+ *region->base = (val & 0x00ff);
+ isc_region_consume(region, 1);
+}
+
+static uint16_t
+uint16_fromregion(isc_region_t *region) {
+ uint16_t val;
+ unsigned char *cp = region->base;
+
+ val = ((unsigned int)(cp[0])) << 8;
+ val |= ((unsigned int)(cp[1]));
+
+ isc_region_consume(region, 2);
+
+ return (val);
+}
+
+static isc_result_t
+openssldh_todns(const dst_key_t *key, isc_buffer_t *data) {
+ DH *dh;
+ const BIGNUM *pub_key = NULL, *p = NULL, *g = NULL;
+ isc_region_t r;
+ uint16_t dnslen, plen, glen, publen;
+
+ REQUIRE(key->keydata.dh != NULL);
+
+ dh = key->keydata.dh;
+
+ isc_buffer_availableregion(data, &r);
+
+ DH_get0_pqg(dh, &p, NULL, &g);
+ if (BN_cmp(g, bn2) == 0 &&
+ (BN_cmp(p, bn768) == 0 ||
+ BN_cmp(p, bn1024) == 0 ||
+ BN_cmp(p, bn1536) == 0)) {
+ plen = 1;
+ glen = 0;
+ }
+ else {
+ plen = BN_num_bytes(p);
+ glen = BN_num_bytes(g);
+ }
+ DH_get0_key(dh, &pub_key, NULL);
+ publen = BN_num_bytes(pub_key);
+ dnslen = plen + glen + publen + 6;
+ if (r.length < (unsigned int) dnslen)
+ return (ISC_R_NOSPACE);
+
+ uint16_toregion(plen, &r);
+ if (plen == 1) {
+ if (BN_cmp(p, bn768) == 0)
+ *r.base = 1;
+ else if (BN_cmp(p, bn1024) == 0)
+ *r.base = 2;
+ else
+ *r.base = 3;
+ } else
+ BN_bn2bin(p, r.base);
+ isc_region_consume(&r, plen);
+
+ uint16_toregion(glen, &r);
+ if (glen > 0)
+ BN_bn2bin(g, r.base);
+ isc_region_consume(&r, glen);
+
+ uint16_toregion(publen, &r);
+ BN_bn2bin(pub_key, r.base);
+ isc_region_consume(&r, publen);
+
+ isc_buffer_add(data, dnslen);
+
+ return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+openssldh_fromdns(dst_key_t *key, isc_buffer_t *data) {
+ DH *dh;
+ BIGNUM *pub_key = NULL, *p = NULL, *g = NULL;
+ isc_region_t r;
+ uint16_t plen, glen, publen;
+ int special = 0;
+
+ isc_buffer_remainingregion(data, &r);
+ if (r.length == 0)
+ return (ISC_R_SUCCESS);
+
+ dh = DH_new();
+ if (dh == NULL)
+ return (dst__openssl_toresult(ISC_R_NOMEMORY));
+ DH_clear_flags(dh, DH_FLAG_CACHE_MONT_P);
+
+ /*
+ * Read the prime length. 1 & 2 are table entries, > 16 means a
+ * prime follows, otherwise an error.
+ */
+ if (r.length < 2) {
+ DH_free(dh);
+ return (DST_R_INVALIDPUBLICKEY);
+ }
+ plen = uint16_fromregion(&r);
+ if (plen < 16 && plen != 1 && plen != 2) {
+ DH_free(dh);
+ return (DST_R_INVALIDPUBLICKEY);
+ }
+ if (r.length < plen) {
+ DH_free(dh);
+ return (DST_R_INVALIDPUBLICKEY);
+ }
+ if (plen == 1 || plen == 2) {
+ if (plen == 1) {
+ special = *r.base;
+ isc_region_consume(&r, 1);
+ } else {
+ special = uint16_fromregion(&r);
+ }
+ switch (special) {
+ case 1:
+ p = BN_dup(bn768);
+ break;
+ case 2:
+ p = BN_dup(bn1024);
+ break;
+ case 3:
+ p = BN_dup(bn1536);
+ break;
+ default:
+ DH_free(dh);
+ return (DST_R_INVALIDPUBLICKEY);
+ }
+ } else {
+ p = BN_bin2bn(r.base, plen, NULL);
+ isc_region_consume(&r, plen);
+ }
+
+ /*
+ * Read the generator length. This should be 0 if the prime was
+ * special, but it might not be. If it's 0 and the prime is not
+ * special, we have a problem.
+ */
+ if (r.length < 2) {
+ DH_free(dh);
+ return (DST_R_INVALIDPUBLICKEY);
+ }
+ glen = uint16_fromregion(&r);
+ if (r.length < glen) {
+ DH_free(dh);
+ return (DST_R_INVALIDPUBLICKEY);
+ }
+ if (special != 0) {
+ if (glen == 0)
+ g = BN_dup(bn2);
+ else {
+ g = BN_bin2bn(r.base, glen, NULL);
+ if (g != NULL && BN_cmp(g, bn2) != 0) {
+ DH_free(dh);
+ BN_free(g);
+ return (DST_R_INVALIDPUBLICKEY);
+ }
+ }
+ } else {
+ if (glen == 0) {
+ DH_free(dh);
+ return (DST_R_INVALIDPUBLICKEY);
+ }
+ g = BN_bin2bn(r.base, glen, NULL);
+ }
+ isc_region_consume(&r, glen);
+
+ if (p == NULL || g == NULL) {
+ DH_free(dh);
+ if (p != NULL)
+ BN_free(p);
+ if (g != NULL)
+ BN_free(g);
+ return (dst__openssl_toresult(ISC_R_NOMEMORY));
+ }
+ DH_set0_pqg(dh, p, NULL, g);
+
+ if (r.length < 2) {
+ DH_free(dh);
+ return (DST_R_INVALIDPUBLICKEY);
+ }
+ publen = uint16_fromregion(&r);
+ if (r.length < publen) {
+ DH_free(dh);
+ return (DST_R_INVALIDPUBLICKEY);
+ }
+ pub_key = BN_bin2bn(r.base, publen, NULL);
+ if (pub_key == NULL) {
+ DH_free(dh);
+ return (dst__openssl_toresult(ISC_R_NOMEMORY));
+ }
+#if (LIBRESSL_VERSION_NUMBER >= 0x2070000fL) && (LIBRESSL_VERSION_NUMBER <= 0x2070200fL)
+ /*
+ * LibreSSL << 2.7.3 DH_get0_key requires priv_key to be set when
+ * DH structure is empty, hence we cannot use DH_get0_key().
+ */
+ dh->pub_key = pub_key;
+#else /* LIBRESSL_VERSION_NUMBER */
+ DH_set0_key(dh, pub_key, NULL);
+#endif /* LIBRESSL_VERSION_NUMBER */
+ isc_region_consume(&r, publen);
+
+ key->key_size = BN_num_bits(p);
+
+ isc_buffer_forward(data, plen + glen + publen + 6);
+
+ key->keydata.dh = dh;
+
+ return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+openssldh_tofile(const dst_key_t *key, const char *directory) {
+ int i;
+ DH *dh;
+ const BIGNUM *pub_key = NULL, *priv_key = NULL, *p = NULL, *g = NULL;
+ dst_private_t priv;
+ unsigned char *bufs[4];
+ isc_result_t result;
+
+ if (key->keydata.dh == NULL)
+ return (DST_R_NULLKEY);
+
+ if (key->external)
+ return (DST_R_EXTERNALKEY);
+
+ dh = key->keydata.dh;
+ DH_get0_key(dh, &pub_key, &priv_key);
+ DH_get0_pqg(dh, &p, NULL, &g);
+
+ memset(bufs, 0, sizeof(bufs));
+ for (i = 0; i < 4; i++) {
+ bufs[i] = isc_mem_get(key->mctx, BN_num_bytes(p));
+ if (bufs[i] == NULL) {
+ result = ISC_R_NOMEMORY;
+ goto fail;
+ }
+ }
+
+ i = 0;
+
+ priv.elements[i].tag = TAG_DH_PRIME;
+ priv.elements[i].length = BN_num_bytes(p);
+ BN_bn2bin(p, bufs[i]);
+ priv.elements[i].data = bufs[i];
+ i++;
+
+ priv.elements[i].tag = TAG_DH_GENERATOR;
+ priv.elements[i].length = BN_num_bytes(g);
+ BN_bn2bin(g, bufs[i]);
+ priv.elements[i].data = bufs[i];
+ i++;
+
+ priv.elements[i].tag = TAG_DH_PRIVATE;
+ priv.elements[i].length = BN_num_bytes(priv_key);
+ BN_bn2bin(priv_key, bufs[i]);
+ priv.elements[i].data = bufs[i];
+ i++;
+
+ priv.elements[i].tag = TAG_DH_PUBLIC;
+ priv.elements[i].length = BN_num_bytes(pub_key);
+ BN_bn2bin(pub_key, bufs[i]);
+ priv.elements[i].data = bufs[i];
+ i++;
+
+ priv.nelements = i;
+ result = dst__privstruct_writefile(key, &priv, directory);
+ fail:
+ for (i = 0; i < 4; i++) {
+ if (bufs[i] == NULL)
+ break;
+ isc_mem_put(key->mctx, bufs[i], BN_num_bytes(p));
+ }
+ return (result);
+}
+
+static isc_result_t
+openssldh_parse(dst_key_t *key, isc_lex_t *lexer, dst_key_t *pub) {
+ dst_private_t priv;
+ isc_result_t ret;
+ int i;
+ DH *dh = NULL;
+ BIGNUM *pub_key = NULL, *priv_key = NULL, *p = NULL, *g = NULL;
+ isc_mem_t *mctx;
+#define DST_RET(a) {ret = a; goto err;}
+
+ UNUSED(pub);
+ mctx = key->mctx;
+
+ /* read private key file */
+ ret = dst__privstruct_parse(key, DST_ALG_DH, lexer, mctx, &priv);
+ if (ret != ISC_R_SUCCESS)
+ return (ret);
+
+ if (key->external)
+ DST_RET(DST_R_EXTERNALKEY);
+
+ dh = DH_new();
+ if (dh == NULL)
+ DST_RET(ISC_R_NOMEMORY);
+ DH_clear_flags(dh, DH_FLAG_CACHE_MONT_P);
+ key->keydata.dh = dh;
+
+ for (i = 0; i < priv.nelements; i++) {
+ BIGNUM *bn;
+ 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_DH_PRIME:
+ p = bn;
+ break;
+ case TAG_DH_GENERATOR:
+ g = bn;
+ break;
+ case TAG_DH_PRIVATE:
+ priv_key = bn;
+ break;
+ case TAG_DH_PUBLIC:
+ pub_key = bn;
+ break;
+ }
+ }
+ dst__privstruct_free(&priv, mctx);
+ DH_set0_key(dh, pub_key, priv_key);
+ DH_set0_pqg(dh, p, NULL, g);
+
+ key->key_size = BN_num_bits(p);
+ return (ISC_R_SUCCESS);
+
+ err:
+ if (p != NULL)
+ BN_free(p);
+ if (g != NULL)
+ BN_free(g);
+ if (pub_key != NULL)
+ BN_free(pub_key);
+ if (priv_key != NULL)
+ BN_free(priv_key);
+ openssldh_destroy(key);
+ dst__privstruct_free(&priv, mctx);
+ isc_safe_memwipe(&priv, sizeof(priv));
+ return (ret);
+}
+
+static void
+openssldh_cleanup(void) {
+ BN_free(bn2);
+ BN_free(bn768);
+ BN_free(bn1024);
+ BN_free(bn1536);
+}
+
+static dst_func_t openssldh_functions = {
+ NULL, /*%< createctx */
+ NULL, /*%< createctx2 */
+ NULL, /*%< destroyctx */
+ NULL, /*%< adddata */
+ NULL, /*%< openssldh_sign */
+ NULL, /*%< openssldh_verify */
+ NULL, /*%< openssldh_verify2 */
+ openssldh_computesecret,
+ openssldh_compare,
+ openssldh_paramcompare,
+ openssldh_generate,
+ openssldh_isprivate,
+ openssldh_destroy,
+ openssldh_todns,
+ openssldh_fromdns,
+ openssldh_tofile,
+ openssldh_parse,
+ openssldh_cleanup,
+ NULL, /*%< fromlabel */
+ NULL, /*%< dump */
+ NULL, /*%< restore */
+};
+
+isc_result_t
+dst__openssldh_init(dst_func_t **funcp) {
+ REQUIRE(funcp != NULL);
+ if (*funcp == NULL) {
+ if (BN_hex2bn(&bn2, PRIME2) == 0 || bn2 == NULL) {
+ goto cleanup;
+ }
+ if (BN_hex2bn(&bn768, PRIME768) == 0 || bn768 == NULL) {
+ goto cleanup;
+ }
+ if (BN_hex2bn(&bn1024, PRIME1024) == 0 || bn1024 == NULL) {
+ goto cleanup;
+ }
+ if (BN_hex2bn(&bn1536, PRIME1536) == 0 || bn1536 == NULL) {
+ goto cleanup;
+ }
+ *funcp = &openssldh_functions;
+ }
+ return (ISC_R_SUCCESS);
+
+ cleanup:
+ if (bn2 != NULL) BN_free(bn2);
+ if (bn768 != NULL) BN_free(bn768);
+ if (bn1024 != NULL) BN_free(bn1024);
+ if (bn1536 != NULL) BN_free(bn1536);
+ return (ISC_R_NOMEMORY);
+}
+#endif /* !PK11_DH_DISABLE */
+
+#else /* OPENSSL */
+
+#include <isc/util.h>
+
+EMPTY_TRANSLATION_UNIT
+
+#endif /* OPENSSL */
+/*! \file */
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-30 00:55:39 +0000