Flatten bind9 vendor work area

1 files changed, 462 insertions, 0 deletions

diff --git a/lib/dns/openssldsa_link.c b/lib/dns/openssldsa_link.c
new file mode 100644
index 0000000..d2b0833
--- /dev/null
+++ b/lib/dns/openssldsa_link.c
@@ -0,0 +1,462 @@
+/*
+ * Portions Copyright (C) 2004-2007  Internet Systems Consortium, Inc. ("ISC")
+ * Portions Copyright (C) 1999-2002  Internet Software Consortium.
+ * Portions Copyright (C) 1995-2000 by 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.
+ */
+
+/* $Id: openssldsa_link.c,v 1.1.6.9 2007/08/28 07:20:04 tbox Exp $ */
+
+#ifdef OPENSSL
+
+#include <config.h>
+
+#include <string.h>
+
+#include <isc/entropy.h>
+#include <isc/mem.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);
+
+static isc_result_t
+openssldsa_createctx(dst_key_t *key, dst_context_t *dctx) {
+	isc_sha1_t *sha1ctx;
+
+	UNUSED(key);
+
+	sha1ctx = isc_mem_get(dctx->mctx, sizeof(isc_sha1_t));
+	isc_sha1_init(sha1ctx);
+	dctx->opaque = sha1ctx;
+	return (ISC_R_SUCCESS);
+}
+
+static void
+openssldsa_destroyctx(dst_context_t *dctx) {
+	isc_sha1_t *sha1ctx = dctx->opaque;
+
+	if (sha1ctx != NULL) {
+		isc_sha1_invalidate(sha1ctx);
+		isc_mem_put(dctx->mctx, sha1ctx, sizeof(isc_sha1_t));
+		dctx->opaque = NULL;
+	}
+}
+
+static isc_result_t
+openssldsa_adddata(dst_context_t *dctx, const isc_region_t *data) {
+	isc_sha1_t *sha1ctx = dctx->opaque;
+
+	isc_sha1_update(sha1ctx, data->base, data->length);
+	return (ISC_R_SUCCESS);
+}
+
+static int
+BN_bn2bin_fixed(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) {
+	isc_sha1_t *sha1ctx = dctx->opaque;
+	dst_key_t *key = dctx->key;
+	DSA *dsa = key->opaque;
+	DSA_SIG *dsasig;
+	isc_region_t r;
+	unsigned char digest[ISC_SHA1_DIGESTLENGTH];
+
+	isc_buffer_availableregion(sig, &r);
+	if (r.length < ISC_SHA1_DIGESTLENGTH * 2 + 1)
+		return (ISC_R_NOSPACE);
+
+	isc_sha1_final(sha1ctx, digest);
+
+	dsasig = DSA_do_sign(digest, ISC_SHA1_DIGESTLENGTH, dsa);
+	if (dsasig == NULL)
+		return (dst__openssl_toresult(DST_R_SIGNFAILURE));
+
+	*r.base++ = (key->key_size - 512)/64;
+	BN_bn2bin_fixed(dsasig->r, r.base, ISC_SHA1_DIGESTLENGTH);
+	r.base += ISC_SHA1_DIGESTLENGTH;
+	BN_bn2bin_fixed(dsasig->s, r.base, ISC_SHA1_DIGESTLENGTH);
+	r.base += 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) {
+	isc_sha1_t *sha1ctx = dctx->opaque;
+	dst_key_t *key = dctx->key;
+	DSA *dsa = key->opaque;
+	DSA_SIG *dsasig;
+	int status = 0;
+	unsigned char digest[ISC_SHA1_DIGESTLENGTH];
+	unsigned char *cp = sig->base;
+
+	isc_sha1_final(sha1ctx, digest);
+
+	if (sig->length < 2 * ISC_SHA1_DIGESTLENGTH + 1)
+		return (DST_R_VERIFYFAILURE);
+
+	cp++;	/*%< Skip T */
+	dsasig = DSA_SIG_new();
+	dsasig->r = BN_bin2bn(cp, ISC_SHA1_DIGESTLENGTH, NULL);
+	cp += ISC_SHA1_DIGESTLENGTH;
+	dsasig->s = BN_bin2bn(cp, ISC_SHA1_DIGESTLENGTH, NULL);
+	cp += ISC_SHA1_DIGESTLENGTH;
+
+	status = DSA_do_verify(digest, ISC_SHA1_DIGESTLENGTH, dsasig, dsa);
+	DSA_SIG_free(dsasig);
+	if (status == 0)
+		return (dst__openssl_toresult(DST_R_VERIFYFAILURE));
+
+	return (ISC_R_SUCCESS);
+}
+
+static isc_boolean_t
+openssldsa_compare(const dst_key_t *key1, const dst_key_t *key2) {
+	int status;
+	DSA *dsa1, *dsa2;
+
+	dsa1 = (DSA *) key1->opaque;
+	dsa2 = (DSA *) key2->opaque;
+
+	if (dsa1 == NULL && dsa2 == NULL)
+		return (ISC_TRUE);
+	else if (dsa1 == NULL || dsa2 == NULL)
+		return (ISC_FALSE);
+
+	status = BN_cmp(dsa1->p, dsa2->p) ||
+		 BN_cmp(dsa1->q, dsa2->q) ||
+		 BN_cmp(dsa1->g, dsa2->g) ||
+		 BN_cmp(dsa1->pub_key, dsa2->pub_key);
+
+	if (status != 0)
+		return (ISC_FALSE);
+
+	if (dsa1->priv_key != NULL || dsa2->priv_key != NULL) {
+		if (dsa1->priv_key == NULL || dsa2->priv_key == NULL)
+			return (ISC_FALSE);
+		if (BN_cmp(dsa1->priv_key, dsa2->priv_key))
+			return (ISC_FALSE);
+	}
+	return (ISC_TRUE);
+}
+
+static isc_result_t
+openssldsa_generate(dst_key_t *key, int unused) {
+#if OPENSSL_VERSION_NUMBER > 0x00908000L
+        BN_GENCB cb;
+#endif
+	DSA *dsa;
+	unsigned char rand_array[ISC_SHA1_DIGESTLENGTH];
+	isc_result_t result;
+
+	UNUSED(unused);
+
+	result = dst__entropy_getdata(rand_array, sizeof(rand_array),
+				      ISC_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));
+
+	BN_GENCB_set_old(&cb, NULL, NULL);
+  
+	if (!DSA_generate_parameters_ex(dsa, key->key_size, rand_array,
+					ISC_SHA1_DIGESTLENGTH,  NULL, NULL,
+					&cb))
+	{
+		DSA_free(dsa);
+		return (dst__openssl_toresult(DST_R_OPENSSLFAILURE));
+	}
+#else
+	dsa = DSA_generate_parameters(key->key_size, rand_array,
+				      ISC_SHA1_DIGESTLENGTH, NULL, NULL,
+				      NULL, NULL);
+	if (dsa == NULL)
+		return (dst__openssl_toresult(DST_R_OPENSSLFAILURE));
+#endif
+
+	if (DSA_generate_key(dsa) == 0) {
+		DSA_free(dsa);
+		return (dst__openssl_toresult(DST_R_OPENSSLFAILURE));
+	}
+	dsa->flags &= ~DSA_FLAG_CACHE_MONT_P;
+
+	key->opaque = dsa;
+
+	return (ISC_R_SUCCESS);
+}
+
+static isc_boolean_t
+openssldsa_isprivate(const dst_key_t *key) {
+	DSA *dsa = (DSA *) key->opaque;
+	return (ISC_TF(dsa != NULL && dsa->priv_key != NULL));
+}
+
+static void
+openssldsa_destroy(dst_key_t *key) {
+	DSA *dsa = key->opaque;
+	DSA_free(dsa);
+	key->opaque = NULL;
+}
+
+
+static isc_result_t
+openssldsa_todns(const dst_key_t *key, isc_buffer_t *data) {
+	DSA *dsa;
+	isc_region_t r;
+	int dnslen;
+	unsigned int t, p_bytes;
+
+	REQUIRE(key->opaque != NULL);
+
+	dsa = (DSA *) key->opaque;
+
+	isc_buffer_availableregion(data, &r);
+
+	t = (BN_num_bytes(dsa->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;
+	BN_bn2bin_fixed(dsa->q, r.base, ISC_SHA1_DIGESTLENGTH);
+	r.base += ISC_SHA1_DIGESTLENGTH;
+	BN_bn2bin_fixed(dsa->p, r.base, key->key_size/8);
+	r.base += p_bytes;
+	BN_bn2bin_fixed(dsa->g, r.base, key->key_size/8);
+	r.base += p_bytes;
+	BN_bn2bin_fixed(dsa->pub_key, r.base, key->key_size/8);
+	r.base += 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;
+	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->flags &= ~DSA_FLAG_CACHE_MONT_P;
+
+	t = (unsigned int) *r.base++;
+	if (t > 8) {
+		DSA_free(dsa);
+		return (DST_R_INVALIDPUBLICKEY);
+	}
+	p_bytes = 64 + 8 * t;
+
+	if (r.length < 1 + ISC_SHA1_DIGESTLENGTH + 3 * p_bytes) {
+		DSA_free(dsa);
+		return (DST_R_INVALIDPUBLICKEY);
+	}
+
+	dsa->q = BN_bin2bn(r.base, ISC_SHA1_DIGESTLENGTH, NULL);
+	r.base += ISC_SHA1_DIGESTLENGTH;
+
+	dsa->p = BN_bin2bn(r.base, p_bytes, NULL);
+	r.base += p_bytes;
+
+	dsa->g = BN_bin2bn(r.base, p_bytes, NULL);
+	r.base += p_bytes;
+
+	dsa->pub_key = BN_bin2bn(r.base, p_bytes, NULL);
+	r.base += p_bytes;
+
+	key->key_size = p_bytes * 8;
+
+	isc_buffer_forward(data, 1 + ISC_SHA1_DIGESTLENGTH + 3 * p_bytes);
+
+	key->opaque = (void *) dsa;
+
+	return (ISC_R_SUCCESS);
+}
+
+
+static isc_result_t
+openssldsa_tofile(const dst_key_t *key, const char *directory) {
+	int cnt = 0;
+	DSA *dsa;
+	dst_private_t priv;
+	unsigned char bufs[5][128];
+
+	if (key->opaque == NULL)
+		return (DST_R_NULLKEY);
+
+	dsa = (DSA *) key->opaque;
+
+	priv.elements[cnt].tag = TAG_DSA_PRIME;
+	priv.elements[cnt].length = BN_num_bytes(dsa->p);
+	BN_bn2bin(dsa->p, bufs[cnt]);
+	priv.elements[cnt].data = bufs[cnt];
+	cnt++;
+
+	priv.elements[cnt].tag = TAG_DSA_SUBPRIME;
+	priv.elements[cnt].length = BN_num_bytes(dsa->q);
+	BN_bn2bin(dsa->q, bufs[cnt]);
+	priv.elements[cnt].data = bufs[cnt];
+	cnt++;
+
+	priv.elements[cnt].tag = TAG_DSA_BASE;
+	priv.elements[cnt].length = BN_num_bytes(dsa->g);
+	BN_bn2bin(dsa->g, bufs[cnt]);
+	priv.elements[cnt].data = bufs[cnt];
+	cnt++;
+
+	priv.elements[cnt].tag = TAG_DSA_PRIVATE;
+	priv.elements[cnt].length = BN_num_bytes(dsa->priv_key);
+	BN_bn2bin(dsa->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(dsa->pub_key);
+	BN_bn2bin(dsa->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_private_t priv;
+	isc_result_t ret;
+	int i;
+	DSA *dsa = 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);
+
+	dsa = DSA_new();
+	if (dsa == NULL)
+		DST_RET(ISC_R_NOMEMORY);
+	dsa->flags &= ~DSA_FLAG_CACHE_MONT_P;
+	key->opaque = 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:
+				dsa->p = bn;
+				break;
+			case TAG_DSA_SUBPRIME:
+				dsa->q = bn;
+				break;
+			case TAG_DSA_BASE:
+				dsa->g = bn;
+				break;
+			case TAG_DSA_PRIVATE:
+				dsa->priv_key = bn;
+				break;
+			case TAG_DSA_PUBLIC:
+				dsa->pub_key = bn;
+				break;
+		}
+	}
+	dst__privstruct_free(&priv, mctx);
+
+	key->key_size = BN_num_bits(dsa->p);
+
+	return (ISC_R_SUCCESS);
+
+ err:
+	openssldsa_destroy(key);
+	dst__privstruct_free(&priv, mctx);
+	memset(&priv, 0, sizeof(priv));
+	return (ret);
+}
+
+static dst_func_t openssldsa_functions = {
+	openssldsa_createctx,
+	openssldsa_destroyctx,
+	openssldsa_adddata,
+	openssldsa_sign,
+	openssldsa_verify,
+	NULL, /*%< computesecret */
+	openssldsa_compare,
+	NULL, /*%< paramcompare */
+	openssldsa_generate,
+	openssldsa_isprivate,
+	openssldsa_destroy,
+	openssldsa_todns,
+	openssldsa_fromdns,
+	openssldsa_tofile,
+	openssldsa_parse,
+	NULL, /*%< cleanup */
+};
+
+isc_result_t
+dst__openssldsa_init(dst_func_t **funcp) {
+	REQUIRE(funcp != NULL);
+	if (*funcp == NULL)
+		*funcp = &openssldsa_functions;
+	return (ISC_R_SUCCESS);
+}
+
+#else /* OPENSSL */
+
+#include <isc/util.h>
+
+EMPTY_TRANSLATION_UNIT
+
+#endif /* OPENSSL */
+/*! \file */