summaryrefslogtreecommitdiffstats
path: root/lib/dns/openssldsa_link.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--lib/dns/openssldsa_link.c815
1 files changed, 815 insertions, 0 deletions
diff --git a/lib/dns/openssldsa_link.c b/lib/dns/openssldsa_link.c
new file mode 100644
index 0000000..8abf4bb
--- /dev/null
+++ b/lib/dns/openssldsa_link.c
@@ -0,0 +1,815 @@
+/*
+ * 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
+#ifndef USE_EVP
+#define USE_EVP 1
+#endif
+
+#include <config.h>
+
+#include <pk11/site.h>
+
+#ifndef PK11_DSA_DISABLE
+
+#include <stdbool.h>
+#include <string.h>
+
+#include <isc/entropy.h>
+#include <isc/mem.h>
+#include <isc/safe.h>
+#include <isc/sha1.h>
+#include <isc/util.h>
+
+#include <dst/result.h>
+
+#include "dst_internal.h"
+#include "dst_openssl.h"
+#include "dst_parse.h"
+
+#include <openssl/dsa.h>
+
+static isc_result_t openssldsa_todns(const dst_key_t *key, isc_buffer_t *data);
+
+#if !defined(HAVE_DSA_GET0_PQG)
+static void
+DSA_get0_pqg(const DSA *d, const BIGNUM **p, const BIGNUM **q,
+ const BIGNUM **g)
+{
+ if (p != NULL)
+ *p = d->p;
+ if (q != NULL)
+ *q = d->q;
+ if (g != NULL)
+ *g = d->g;
+}
+
+static int
+DSA_set0_pqg(DSA *d, BIGNUM *p, BIGNUM *q, BIGNUM *g) {
+ if (p == NULL || q == NULL || g == NULL)
+ return 0;
+ BN_free(d->p);
+ BN_free(d->q);
+ BN_free(d->g);
+ d->p = p;
+ d->q = q;
+ d->g = g;
+
+ return 1;
+}
+
+static void
+DSA_get0_key(const DSA *d, const BIGNUM **pub_key, const BIGNUM **priv_key) {
+ if (pub_key != NULL)
+ *pub_key = d->pub_key;
+ if (priv_key != NULL)
+ *priv_key = d->priv_key;
+}
+
+static int
+DSA_set0_key(DSA *d, BIGNUM *pub_key, BIGNUM *priv_key) {
+ /* Note that it is valid for priv_key to be NULL */
+ if (pub_key == NULL)
+ return 0;
+
+ BN_free(d->pub_key);
+ BN_free(d->priv_key);
+ d->pub_key = pub_key;
+ d->priv_key = priv_key;
+
+ return 1;
+}
+
+static void
+DSA_SIG_get0(const DSA_SIG *sig, const BIGNUM **pr, const BIGNUM **ps) {
+ *pr = sig->r;
+ *ps = sig->s;
+}
+
+static int
+DSA_SIG_set0(DSA_SIG *sig, BIGNUM *r, BIGNUM *s) {
+ if (r == NULL || s == NULL)
+ return 0;
+
+ BN_clear_free(sig->r);
+ BN_clear_free(sig->s);
+ sig->r = r;
+ sig->s = s;
+
+ return 1;
+}
+
+
+#define DSA_clear_flags(d, x) (d)->flags &= ~(x)
+
+#endif
+
+static isc_result_t
+openssldsa_createctx(dst_key_t *key, dst_context_t *dctx) {
+#if USE_EVP
+ EVP_MD_CTX *evp_md_ctx;
+
+ UNUSED(key);
+
+ evp_md_ctx = EVP_MD_CTX_create();
+ if (evp_md_ctx == NULL)
+ return (ISC_R_NOMEMORY);
+
+ if (!EVP_DigestInit_ex(evp_md_ctx, EVP_dss1(), NULL)) {
+ EVP_MD_CTX_destroy(evp_md_ctx);
+ return (ISC_R_FAILURE);
+ }
+
+ dctx->ctxdata.evp_md_ctx = evp_md_ctx;
+
+ return (ISC_R_SUCCESS);
+#else
+ isc_sha1_t *sha1ctx;
+
+ UNUSED(key);
+
+ sha1ctx = isc_mem_get(dctx->mctx, sizeof(isc_sha1_t));
+ if (sha1ctx == NULL)
+ return (ISC_R_NOMEMORY);
+ isc_sha1_init(sha1ctx);
+ dctx->ctxdata.sha1ctx = sha1ctx;
+ return (ISC_R_SUCCESS);
+#endif
+}
+
+static void
+openssldsa_destroyctx(dst_context_t *dctx) {
+#if USE_EVP
+ EVP_MD_CTX *evp_md_ctx = dctx->ctxdata.evp_md_ctx;
+
+ if (evp_md_ctx != NULL) {
+ EVP_MD_CTX_destroy(evp_md_ctx);
+ dctx->ctxdata.evp_md_ctx = NULL;
+ }
+#else
+ isc_sha1_t *sha1ctx = dctx->ctxdata.sha1ctx;
+
+ if (sha1ctx != NULL) {
+ isc_sha1_invalidate(sha1ctx);
+ isc_mem_put(dctx->mctx, sha1ctx, sizeof(isc_sha1_t));
+ dctx->ctxdata.sha1ctx = NULL;
+ }
+#endif
+}
+
+static isc_result_t
+openssldsa_adddata(dst_context_t *dctx, const isc_region_t *data) {
+#if USE_EVP
+ EVP_MD_CTX *evp_md_ctx = dctx->ctxdata.evp_md_ctx;
+
+ if (!EVP_DigestUpdate(evp_md_ctx, data->base, data->length)) {
+ return (ISC_R_FAILURE);
+ }
+#else
+ isc_sha1_t *sha1ctx = dctx->ctxdata.sha1ctx;
+
+ isc_sha1_update(sha1ctx, data->base, data->length);
+#endif
+ return (ISC_R_SUCCESS);
+}
+
+static int
+BN_bn2bin_fixed(const BIGNUM *bn, unsigned char *buf, int size) {
+ int bytes = size - BN_num_bytes(bn);
+ while (bytes-- > 0)
+ *buf++ = 0;
+ BN_bn2bin(bn, buf);
+ return (size);
+}
+
+static isc_result_t
+openssldsa_sign(dst_context_t *dctx, isc_buffer_t *sig) {
+ dst_key_t *key = dctx->key;
+ DSA *dsa = key->keydata.dsa;
+ isc_region_t region;
+ DSA_SIG *dsasig;
+ const BIGNUM *r = 0, *s = NULL;
+ unsigned int klen;
+#if USE_EVP
+ EVP_MD_CTX *evp_md_ctx = dctx->ctxdata.evp_md_ctx;
+ EVP_PKEY *pkey;
+ unsigned char *sigbuf;
+ const unsigned char *sb;
+ unsigned int siglen;
+#else
+ isc_sha1_t *sha1ctx = dctx->ctxdata.sha1ctx;
+ unsigned char digest[ISC_SHA1_DIGESTLENGTH];
+#endif
+
+ isc_buffer_availableregion(sig, &region);
+ if (region.length < ISC_SHA1_DIGESTLENGTH * 2 + 1)
+ return (ISC_R_NOSPACE);
+
+#if USE_EVP
+ pkey = EVP_PKEY_new();
+ if (pkey == NULL)
+ return (ISC_R_NOMEMORY);
+ if (!EVP_PKEY_set1_DSA(pkey, dsa)) {
+ EVP_PKEY_free(pkey);
+ return (ISC_R_FAILURE);
+ }
+ sigbuf = malloc(EVP_PKEY_size(pkey));
+ if (sigbuf == NULL) {
+ EVP_PKEY_free(pkey);
+ return (ISC_R_NOMEMORY);
+ }
+ if (!EVP_SignFinal(evp_md_ctx, sigbuf, &siglen, pkey)) {
+ EVP_PKEY_free(pkey);
+ free(sigbuf);
+ return (dst__openssl_toresult3(dctx->category,
+ "EVP_SignFinal",
+ ISC_R_FAILURE));
+ }
+ INSIST(EVP_PKEY_size(pkey) >= (int) siglen);
+ EVP_PKEY_free(pkey);
+ /* Convert from Dss-Sig-Value (RFC2459). */
+ dsasig = DSA_SIG_new();
+ if (dsasig == NULL) {
+ free(sigbuf);
+ return (ISC_R_NOMEMORY);
+ }
+ sb = sigbuf;
+ if (d2i_DSA_SIG(&dsasig, &sb, (long) siglen) == NULL) {
+ free(sigbuf);
+ return (dst__openssl_toresult3(dctx->category,
+ "d2i_DSA_SIG",
+ ISC_R_FAILURE));
+ }
+ free(sigbuf);
+
+#elif 0
+ /* Only use EVP for the Digest */
+ if (!EVP_DigestFinal_ex(evp_md_ctx, digest, &siglen)) {
+ return (dst__openssl_toresult3(dctx->category,
+ "EVP_DigestFinal_ex",
+ ISC_R_FAILURE));
+ }
+ dsasig = DSA_do_sign(digest, ISC_SHA1_DIGESTLENGTH, dsa);
+ if (dsasig == NULL)
+ return (dst__openssl_toresult3(dctx->category,
+ "DSA_do_sign",
+ DST_R_SIGNFAILURE));
+#else
+ isc_sha1_final(sha1ctx, digest);
+
+ dsasig = DSA_do_sign(digest, ISC_SHA1_DIGESTLENGTH, dsa);
+ if (dsasig == NULL)
+ return (dst__openssl_toresult3(dctx->category,
+ "DSA_do_sign",
+ DST_R_SIGNFAILURE));
+#endif
+
+ klen = (key->key_size - 512)/64;
+ if (klen > 255)
+ return (ISC_R_FAILURE);
+ *region.base = klen;
+ isc_region_consume(&region, 1);
+
+ DSA_SIG_get0(dsasig, &r, &s);
+ BN_bn2bin_fixed(r, region.base, ISC_SHA1_DIGESTLENGTH);
+ isc_region_consume(&region, ISC_SHA1_DIGESTLENGTH);
+ BN_bn2bin_fixed(s, region.base, ISC_SHA1_DIGESTLENGTH);
+ isc_region_consume(&region, ISC_SHA1_DIGESTLENGTH);
+ DSA_SIG_free(dsasig);
+ isc_buffer_add(sig, ISC_SHA1_DIGESTLENGTH * 2 + 1);
+
+ return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+openssldsa_verify(dst_context_t *dctx, const isc_region_t *sig) {
+ dst_key_t *key = dctx->key;
+ DSA *dsa = key->keydata.dsa;
+ BIGNUM *r = NULL, *s = NULL;
+ int status = 0;
+ unsigned char *cp = sig->base;
+ DSA_SIG *dsasig;
+#if USE_EVP
+ EVP_MD_CTX *evp_md_ctx = dctx->ctxdata.evp_md_ctx;
+#if 0
+ EVP_PKEY *pkey;
+ unsigned char *sigbuf;
+#endif
+ unsigned int siglen;
+#else
+ isc_sha1_t *sha1ctx = dctx->ctxdata.sha1ctx;
+#endif
+ unsigned char digest[ISC_SHA1_DIGESTLENGTH];
+
+
+#if USE_EVP
+#if 1
+ /* Only use EVP for the digest */
+ if (!EVP_DigestFinal_ex(evp_md_ctx, digest, &siglen)) {
+ return (ISC_R_FAILURE);
+ }
+#endif
+#else
+ isc_sha1_final(sha1ctx, digest);
+#endif
+
+ if (sig->length != 2 * ISC_SHA1_DIGESTLENGTH + 1) {
+ return (DST_R_VERIFYFAILURE);
+ }
+
+ cp++; /*%< Skip T */
+ dsasig = DSA_SIG_new();
+ if (dsasig == NULL)
+ return (ISC_R_NOMEMORY);
+ r = BN_bin2bn(cp, ISC_SHA1_DIGESTLENGTH, NULL);
+ cp += ISC_SHA1_DIGESTLENGTH;
+ s = BN_bin2bn(cp, ISC_SHA1_DIGESTLENGTH, NULL);
+ DSA_SIG_set0(dsasig, r, s);
+
+#if 0
+ pkey = EVP_PKEY_new();
+ if (pkey == NULL)
+ return (ISC_R_NOMEMORY);
+ if (!EVP_PKEY_set1_DSA(pkey, dsa)) {
+ EVP_PKEY_free(pkey);
+ return (ISC_R_FAILURE);
+ }
+ /* Convert to Dss-Sig-Value (RFC2459). */
+ sigbuf = malloc(EVP_PKEY_size(pkey) + 50);
+ if (sigbuf == NULL) {
+ EVP_PKEY_free(pkey);
+ return (ISC_R_NOMEMORY);
+ }
+ siglen = (unsigned) i2d_DSA_SIG(dsasig, &sigbuf);
+ INSIST(EVP_PKEY_size(pkey) >= (int) siglen);
+ status = EVP_VerifyFinal(evp_md_ctx, sigbuf, siglen, pkey);
+ EVP_PKEY_free(pkey);
+ free(sigbuf);
+#else
+ status = DSA_do_verify(digest, ISC_SHA1_DIGESTLENGTH, dsasig, dsa);
+#endif
+ DSA_SIG_free(dsasig);
+ switch (status) {
+ case 1:
+ return (ISC_R_SUCCESS);
+ case 0:
+ return (dst__openssl_toresult(DST_R_VERIFYFAILURE));
+ default:
+ return (dst__openssl_toresult3(dctx->category,
+ "DSA_do_verify",
+ DST_R_VERIFYFAILURE));
+ }
+}
+
+static bool
+openssldsa_compare(const dst_key_t *key1, const dst_key_t *key2) {
+ DSA *dsa1, *dsa2;
+ const BIGNUM *pub_key1 = NULL, *priv_key1 = NULL;
+ const BIGNUM *pub_key2 = NULL, *priv_key2 = NULL;
+ const BIGNUM *p1 = NULL, *q1 = NULL, *g1 = NULL;
+ const BIGNUM *p2 = NULL, *q2 = NULL, *g2 = NULL;
+
+ dsa1 = key1->keydata.dsa;
+ dsa2 = key2->keydata.dsa;
+
+ if (dsa1 == NULL && dsa2 == NULL)
+ return (true);
+ else if (dsa1 == NULL || dsa2 == NULL)
+ return (false);
+
+ DSA_get0_key(dsa1, &pub_key1, &priv_key1);
+ DSA_get0_key(dsa2, &pub_key2, &priv_key2);
+ DSA_get0_pqg(dsa1, &p1, &q1, &g1);
+ DSA_get0_pqg(dsa2, &p2, &q2, &g2);
+
+ if (BN_cmp(p1, p2) != 0 || BN_cmp(q1, q2) != 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))
+ 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
+openssldsa_generate(dst_key_t *key, int unused, void (*callback)(int)) {
+ DSA *dsa;
+ unsigned char rand_array[ISC_SHA1_DIGESTLENGTH];
+ isc_result_t result;
+#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
+ UNUSED(unused);
+
+ result = dst__entropy_getdata(rand_array, sizeof(rand_array),
+ false);
+ if (result != ISC_R_SUCCESS)
+ return (result);
+
+#if OPENSSL_VERSION_NUMBER > 0x00908000L
+ dsa = DSA_new();
+ if (dsa == NULL)
+ return (dst__openssl_toresult(DST_R_OPENSSLFAILURE));
+ cb = BN_GENCB_new();
+#if OPENSSL_VERSION_NUMBER >= 0x10100000L && !defined(LIBRESSL_VERSION_NUMBER)
+ if (cb == NULL) {
+ DSA_free(dsa);
+ return (dst__openssl_toresult(DST_R_OPENSSLFAILURE));
+ }
+#endif
+ if (callback == NULL) {
+ BN_GENCB_set_old(cb, NULL, NULL);
+ } else {
+ u.fptr = callback;
+ BN_GENCB_set(cb, &progress_cb, u.dptr);
+ }
+
+ if (!DSA_generate_parameters_ex(dsa, key->key_size, rand_array,
+ ISC_SHA1_DIGESTLENGTH, NULL, NULL,
+ cb))
+ {
+ DSA_free(dsa);
+ BN_GENCB_free(cb);
+ return (dst__openssl_toresult2("DSA_generate_parameters_ex",
+ DST_R_OPENSSLFAILURE));
+ }
+ BN_GENCB_free(cb);
+ cb = NULL;
+#else
+ dsa = DSA_generate_parameters(key->key_size, rand_array,
+ ISC_SHA1_DIGESTLENGTH, NULL, NULL,
+ NULL, NULL);
+ if (dsa == NULL)
+ return (dst__openssl_toresult2("DSA_generate_parameters",
+ DST_R_OPENSSLFAILURE));
+#endif
+
+ if (DSA_generate_key(dsa) == 0) {
+ DSA_free(dsa);
+ return (dst__openssl_toresult2("DSA_generate_key",
+ DST_R_OPENSSLFAILURE));
+ }
+
+ DSA_clear_flags(dsa, DSA_FLAG_CACHE_MONT_P);
+
+ key->keydata.dsa = dsa;
+
+ return (ISC_R_SUCCESS);
+}
+
+static bool
+openssldsa_isprivate(const dst_key_t *key) {
+ DSA *dsa = key->keydata.dsa;
+ const BIGNUM *priv_key = NULL;
+
+ DSA_get0_key(dsa, NULL, &priv_key);
+ return (dsa != NULL && priv_key != NULL);
+}
+
+static void
+openssldsa_destroy(dst_key_t *key) {
+ DSA *dsa = key->keydata.dsa;
+ DSA_free(dsa);
+ key->keydata.dsa = NULL;
+}
+
+
+static isc_result_t
+openssldsa_todns(const dst_key_t *key, isc_buffer_t *data) {
+ DSA *dsa;
+ const BIGNUM *pub_key, *p = NULL, *q = NULL, *g = NULL;
+ isc_region_t r;
+ int dnslen;
+ unsigned int t, p_bytes;
+
+ REQUIRE(key->keydata.dsa != NULL);
+
+ dsa = key->keydata.dsa;
+
+ isc_buffer_availableregion(data, &r);
+
+ DSA_get0_key(dsa, &pub_key, NULL);
+ DSA_get0_pqg(dsa, &p, &q, &g);
+
+ t = (BN_num_bytes(p) - 64) / 8;
+ if (t > 8)
+ return (DST_R_INVALIDPUBLICKEY);
+ p_bytes = 64 + 8 * t;
+
+ dnslen = 1 + (key->key_size * 3)/8 + ISC_SHA1_DIGESTLENGTH;
+ if (r.length < (unsigned int) dnslen)
+ return (ISC_R_NOSPACE);
+
+ *r.base = t;
+ isc_region_consume(&r, 1);
+
+ BN_bn2bin_fixed(q, r.base, ISC_SHA1_DIGESTLENGTH);
+ isc_region_consume(&r, ISC_SHA1_DIGESTLENGTH);
+ BN_bn2bin_fixed(p, r.base, key->key_size/8);
+ isc_region_consume(&r, p_bytes);
+ BN_bn2bin_fixed(g, r.base, key->key_size/8);
+ isc_region_consume(&r, p_bytes);
+ BN_bn2bin_fixed(pub_key, r.base, key->key_size/8);
+ isc_region_consume(&r, p_bytes);
+
+ isc_buffer_add(data, dnslen);
+
+ return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+openssldsa_fromdns(dst_key_t *key, isc_buffer_t *data) {
+ DSA *dsa;
+ BIGNUM *pub_key, *p, *q, *g;
+ isc_region_t r;
+ unsigned int t, p_bytes;
+ isc_mem_t *mctx = key->mctx;
+
+ UNUSED(mctx);
+
+ isc_buffer_remainingregion(data, &r);
+ if (r.length == 0)
+ return (ISC_R_SUCCESS);
+
+ dsa = DSA_new();
+ if (dsa == NULL)
+ return (ISC_R_NOMEMORY);
+ DSA_clear_flags(dsa, DSA_FLAG_CACHE_MONT_P);
+
+ t = (unsigned int) *r.base;
+ isc_region_consume(&r, 1);
+ if (t > 8) {
+ DSA_free(dsa);
+ return (DST_R_INVALIDPUBLICKEY);
+ }
+ p_bytes = 64 + 8 * t;
+
+ if (r.length < ISC_SHA1_DIGESTLENGTH + 3 * p_bytes) {
+ DSA_free(dsa);
+ return (DST_R_INVALIDPUBLICKEY);
+ }
+
+ q = BN_bin2bn(r.base, ISC_SHA1_DIGESTLENGTH, NULL);
+ isc_region_consume(&r, ISC_SHA1_DIGESTLENGTH);
+
+ p = BN_bin2bn(r.base, p_bytes, NULL);
+ isc_region_consume(&r, p_bytes);
+
+ g = BN_bin2bn(r.base, p_bytes, NULL);
+ isc_region_consume(&r, p_bytes);
+
+ pub_key = BN_bin2bn(r.base, p_bytes, NULL);
+ isc_region_consume(&r, p_bytes);
+
+ if (pub_key == NULL || p == NULL || q == NULL || g == NULL) {
+ DSA_free(dsa);
+ if (p != NULL) BN_free(p);
+ if (q != NULL) BN_free(q);
+ if (g != NULL) BN_free(g);
+ return (ISC_R_NOMEMORY);
+ }
+
+ DSA_set0_key(dsa, pub_key, NULL);
+ DSA_set0_pqg(dsa, p, q, g);
+
+ key->key_size = p_bytes * 8;
+
+ isc_buffer_forward(data, 1 + ISC_SHA1_DIGESTLENGTH + 3 * p_bytes);
+
+ key->keydata.dsa = dsa;
+
+ return (ISC_R_SUCCESS);
+}
+
+
+static isc_result_t
+openssldsa_tofile(const dst_key_t *key, const char *directory) {
+ int cnt = 0;
+ DSA *dsa;
+ const BIGNUM *pub_key = NULL, *priv_key = NULL;
+ const BIGNUM *p = NULL, *q = NULL, *g = NULL;
+ dst_private_t priv;
+ unsigned char bufs[5][128];
+
+ if (key->keydata.dsa == NULL)
+ return (DST_R_NULLKEY);
+
+ if (key->external) {
+ priv.nelements = 0;
+ return (dst__privstruct_writefile(key, &priv, directory));
+ }
+
+ dsa = key->keydata.dsa;
+
+ DSA_get0_key(dsa, &pub_key, &priv_key);
+ DSA_get0_pqg(dsa, &p, &q, &g);
+
+ priv.elements[cnt].tag = TAG_DSA_PRIME;
+ priv.elements[cnt].length = BN_num_bytes(p);
+ BN_bn2bin(p, bufs[cnt]);
+ priv.elements[cnt].data = bufs[cnt];
+ cnt++;
+
+ priv.elements[cnt].tag = TAG_DSA_SUBPRIME;
+ priv.elements[cnt].length = BN_num_bytes(q);
+ BN_bn2bin(q, bufs[cnt]);
+ priv.elements[cnt].data = bufs[cnt];
+ cnt++;
+
+ priv.elements[cnt].tag = TAG_DSA_BASE;
+ priv.elements[cnt].length = BN_num_bytes(g);
+ BN_bn2bin(g, bufs[cnt]);
+ priv.elements[cnt].data = bufs[cnt];
+ cnt++;
+
+ priv.elements[cnt].tag = TAG_DSA_PRIVATE;
+ priv.elements[cnt].length = BN_num_bytes(priv_key);
+ BN_bn2bin(priv_key, bufs[cnt]);
+ priv.elements[cnt].data = bufs[cnt];
+ cnt++;
+
+ priv.elements[cnt].tag = TAG_DSA_PUBLIC;
+ priv.elements[cnt].length = BN_num_bytes(pub_key);
+ BN_bn2bin(pub_key, bufs[cnt]);
+ priv.elements[cnt].data = bufs[cnt];
+ cnt++;
+
+ priv.nelements = cnt;
+ return (dst__privstruct_writefile(key, &priv, directory));
+}
+
+static isc_result_t
+openssldsa_parse(dst_key_t *key, isc_lex_t *lexer, dst_key_t *pub) {
+ dst_private_t priv;
+ isc_result_t ret;
+ int i;
+ DSA *dsa = NULL;
+ BIGNUM *pub_key = NULL, *priv_key = NULL;
+ BIGNUM *p = NULL, *q = NULL, *g = NULL;
+ isc_mem_t *mctx = key->mctx;
+#define DST_RET(a) {ret = a; goto err;}
+
+ /* read private key file */
+ ret = dst__privstruct_parse(key, DST_ALG_DSA, lexer, mctx, &priv);
+ if (ret != ISC_R_SUCCESS)
+ return (ret);
+
+ 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);
+ }
+
+ dsa = DSA_new();
+ if (dsa == NULL)
+ DST_RET(ISC_R_NOMEMORY);
+ DSA_clear_flags(dsa, DSA_FLAG_CACHE_MONT_P);
+ key->keydata.dsa = dsa;
+
+ 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_DSA_PRIME:
+ p = bn;
+ break;
+ case TAG_DSA_SUBPRIME:
+ q = bn;
+ break;
+ case TAG_DSA_BASE:
+ g = bn;
+ break;
+ case TAG_DSA_PRIVATE:
+ priv_key = bn;
+ break;
+ case TAG_DSA_PUBLIC:
+ pub_key = bn;
+ break;
+ }
+ }
+ dst__privstruct_free(&priv, mctx);
+ isc_safe_memwipe(&priv, sizeof(priv));
+ DSA_set0_key(dsa, pub_key, priv_key);
+ DSA_set0_pqg(dsa, p, q, g);
+ key->key_size = BN_num_bits(p);
+ return (ISC_R_SUCCESS);
+
+ err:
+ if (p != NULL)
+ BN_free(p);
+ if (q != NULL)
+ BN_free(q);
+ if (g != NULL)
+ BN_free(g);
+ openssldsa_destroy(key);
+ dst__privstruct_free(&priv, mctx);
+ isc_safe_memwipe(&priv, sizeof(priv));
+ return (ret);
+}
+
+static dst_func_t openssldsa_functions = {
+ openssldsa_createctx,
+ NULL, /*%< createctx2 */
+ openssldsa_destroyctx,
+ openssldsa_adddata,
+ openssldsa_sign,
+ openssldsa_verify,
+ NULL, /*%< verify2 */
+ NULL, /*%< computesecret */
+ openssldsa_compare,
+ NULL, /*%< paramcompare */
+ openssldsa_generate,
+ openssldsa_isprivate,
+ openssldsa_destroy,
+ openssldsa_todns,
+ openssldsa_fromdns,
+ openssldsa_tofile,
+ openssldsa_parse,
+ NULL, /*%< cleanup */
+ NULL, /*%< fromlabel */
+ NULL, /*%< dump */
+ NULL, /*%< restore */
+};
+
+isc_result_t
+dst__openssldsa_init(dst_func_t **funcp) {
+ REQUIRE(funcp != NULL);
+ if (*funcp == NULL)
+ *funcp = &openssldsa_functions;
+ return (ISC_R_SUCCESS);
+}
+#endif /* !PK11_DSA_DISABLE */
+
+#else /* OPENSSL */
+
+#include <isc/util.h>
+
+EMPTY_TRANSLATION_UNIT
+
+#endif /* OPENSSL */
+/*! \file */