added unbound to external deps

1 files changed, 1072 insertions, 0 deletions

diff --git a/external/unbound/validator/val_secalgo.c b/external/unbound/validator/val_secalgo.c
new file mode 100644
index 000000000..d89675f83
--- /dev/null
+++ b/external/unbound/validator/val_secalgo.c
@@ -0,0 +1,1072 @@
+/*
+ * validator/val_secalgo.c - validator security algorithm functions.
+ *
+ * Copyright (c) 2012, NLnet Labs. All rights reserved.
+ *
+ * This software is open source.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 
+ * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 
+ * Neither the name of the NLNET LABS nor the names of its contributors may
+ * be used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/**
+ * \file
+ *
+ * This file contains helper functions for the validator module.
+ * These functions take raw data buffers, formatted for crypto verification,
+ * and do the library calls (for the crypto library in use).
+ */
+#include "config.h"
+#include "validator/val_secalgo.h"
+#include "util/data/packed_rrset.h"
+#include "util/log.h"
+#include "ldns/rrdef.h"
+#include "ldns/keyraw.h"
+#include "ldns/sbuffer.h"
+
+#if !defined(HAVE_SSL) && !defined(HAVE_NSS)
+#error "Need crypto library to do digital signature cryptography"
+#endif
+
+/* OpenSSL implementation */
+#ifdef HAVE_SSL
+#ifdef HAVE_OPENSSL_ERR_H
+#include <openssl/err.h>
+#endif
+
+#ifdef HAVE_OPENSSL_RAND_H
+#include <openssl/rand.h>
+#endif
+
+#ifdef HAVE_OPENSSL_CONF_H
+#include <openssl/conf.h>
+#endif
+
+#ifdef HAVE_OPENSSL_ENGINE_H
+#include <openssl/engine.h>
+#endif
+
+/**
+ * Return size of DS digest according to its hash algorithm.
+ * @param algo: DS digest algo.
+ * @return size in bytes of digest, or 0 if not supported. 
+ */
+size_t
+ds_digest_size_supported(int algo)
+{
+	switch(algo) {
+#ifdef HAVE_EVP_SHA1
+		case LDNS_SHA1:
+			return SHA_DIGEST_LENGTH;
+#endif
+#ifdef HAVE_EVP_SHA256
+		case LDNS_SHA256:
+			return SHA256_DIGEST_LENGTH;
+#endif
+#ifdef USE_GOST
+		case LDNS_HASH_GOST:
+			if(EVP_get_digestbyname("md_gost94"))
+				return 32;
+			else	return 0;
+#endif
+#ifdef USE_ECDSA
+		case LDNS_SHA384:
+			return SHA384_DIGEST_LENGTH;
+#endif
+		default: break;
+	}
+	return 0;
+}
+
+#ifdef USE_GOST
+/** Perform GOST hash */
+static int
+do_gost94(unsigned char* data, size_t len, unsigned char* dest)
+{
+	const EVP_MD* md = EVP_get_digestbyname("md_gost94");
+	if(!md) 
+		return 0;
+	return sldns_digest_evp(data, (unsigned int)len, dest, md);
+}
+#endif
+
+int
+secalgo_ds_digest(int algo, unsigned char* buf, size_t len,
+	unsigned char* res)
+{
+	switch(algo) {
+#ifdef HAVE_EVP_SHA1
+		case LDNS_SHA1:
+			(void)SHA1(buf, len, res);
+			return 1;
+#endif
+#ifdef HAVE_EVP_SHA256
+		case LDNS_SHA256:
+			(void)SHA256(buf, len, res);
+			return 1;
+#endif
+#ifdef USE_GOST
+		case LDNS_HASH_GOST:
+			if(do_gost94(buf, len, res))
+				return 1;
+			break;
+#endif
+#ifdef USE_ECDSA
+		case LDNS_SHA384:
+			(void)SHA384(buf, len, res);
+			return 1;
+#endif
+		default: 
+			verbose(VERB_QUERY, "unknown DS digest algorithm %d", 
+				algo);
+			break;
+	}
+	return 0;
+}
+
+/** return true if DNSKEY algorithm id is supported */
+int
+dnskey_algo_id_is_supported(int id)
+{
+	switch(id) {
+	case LDNS_RSAMD5:
+		/* RFC 6725 deprecates RSAMD5 */
+		return 0;
+	case LDNS_DSA:
+	case LDNS_DSA_NSEC3:
+	case LDNS_RSASHA1:
+	case LDNS_RSASHA1_NSEC3:
+#if defined(HAVE_EVP_SHA256) && defined(USE_SHA2)
+	case LDNS_RSASHA256:
+#endif
+#if defined(HAVE_EVP_SHA512) && defined(USE_SHA2)
+	case LDNS_RSASHA512:
+#endif
+#ifdef USE_ECDSA
+	case LDNS_ECDSAP256SHA256:
+	case LDNS_ECDSAP384SHA384:
+#endif
+		return 1;
+#ifdef USE_GOST
+	case LDNS_ECC_GOST:
+		/* we support GOST if it can be loaded */
+		return sldns_key_EVP_load_gost_id();
+#endif
+	default:
+		return 0;
+	}
+}
+
+/**
+ * Output a libcrypto openssl error to the logfile.
+ * @param str: string to add to it.
+ * @param e: the error to output, error number from ERR_get_error().
+ */
+static void
+log_crypto_error(const char* str, unsigned long e)
+{
+	char buf[128];
+	/* or use ERR_error_string if ERR_error_string_n is not avail TODO */
+	ERR_error_string_n(e, buf, sizeof(buf));
+	/* buf now contains */
+	/* error:[error code]:[library name]:[function name]:[reason string] */
+	log_err("%s crypto %s", str, buf);
+}
+
+/**
+ * Setup DSA key digest in DER encoding ... 
+ * @param sig: input is signature output alloced ptr (unless failure).
+ * 	caller must free alloced ptr if this routine returns true.
+ * @param len: input is initial siglen, output is output len.
+ * @return false on failure.
+ */
+static int
+setup_dsa_sig(unsigned char** sig, unsigned int* len)
+{
+	unsigned char* orig = *sig;
+	unsigned int origlen = *len;
+	int newlen;
+	BIGNUM *R, *S;
+	DSA_SIG *dsasig;
+
+	/* extract the R and S field from the sig buffer */
+	if(origlen < 1 + 2*SHA_DIGEST_LENGTH)
+		return 0;
+	R = BN_new();
+	if(!R) return 0;
+	(void) BN_bin2bn(orig + 1, SHA_DIGEST_LENGTH, R);
+	S = BN_new();
+	if(!S) return 0;
+	(void) BN_bin2bn(orig + 21, SHA_DIGEST_LENGTH, S);
+	dsasig = DSA_SIG_new();
+	if(!dsasig) return 0;
+
+	dsasig->r = R;
+	dsasig->s = S;
+	*sig = NULL;
+	newlen = i2d_DSA_SIG(dsasig, sig);
+	if(newlen < 0) {
+		DSA_SIG_free(dsasig);
+		free(*sig);
+		return 0;
+	}
+	*len = (unsigned int)newlen;
+	DSA_SIG_free(dsasig);
+	return 1;
+}
+
+#ifdef USE_ECDSA
+/**
+ * Setup the ECDSA signature in its encoding that the library wants.
+ * Converts from plain numbers to ASN formatted.
+ * @param sig: input is signature, output alloced ptr (unless failure).
+ * 	caller must free alloced ptr if this routine returns true.
+ * @param len: input is initial siglen, output is output len.
+ * @return false on failure.
+ */
+static int
+setup_ecdsa_sig(unsigned char** sig, unsigned int* len)
+{
+	ECDSA_SIG* ecdsa_sig;
+	int newlen;
+	int bnsize = (int)((*len)/2);
+	/* if too short or not even length, fails */
+	if(*len < 16 || bnsize*2 != (int)*len)
+		return 0;
+	/* use the raw data to parse two evenly long BIGNUMs, "r | s". */
+	ecdsa_sig = ECDSA_SIG_new();
+	if(!ecdsa_sig) return 0;
+	ecdsa_sig->r = BN_bin2bn(*sig, bnsize, ecdsa_sig->r);
+	ecdsa_sig->s = BN_bin2bn(*sig+bnsize, bnsize, ecdsa_sig->s);
+	if(!ecdsa_sig->r || !ecdsa_sig->s) {
+		ECDSA_SIG_free(ecdsa_sig);
+		return 0;
+	}
+
+	/* spool it into ASN format */
+	*sig = NULL;
+	newlen = i2d_ECDSA_SIG(ecdsa_sig, sig);
+	if(newlen <= 0) {
+		ECDSA_SIG_free(ecdsa_sig);
+		free(*sig);
+		return 0;
+	}
+	*len = (unsigned int)newlen;
+	ECDSA_SIG_free(ecdsa_sig);
+	return 1;
+}
+#endif /* USE_ECDSA */
+
+/**
+ * Setup key and digest for verification. Adjust sig if necessary.
+ *
+ * @param algo: key algorithm
+ * @param evp_key: EVP PKEY public key to create.
+ * @param digest_type: digest type to use
+ * @param key: key to setup for.
+ * @param keylen: length of key.
+ * @return false on failure.
+ */
+static int
+setup_key_digest(int algo, EVP_PKEY** evp_key, const EVP_MD** digest_type, 
+	unsigned char* key, size_t keylen)
+{
+	DSA* dsa;
+	RSA* rsa;
+
+	switch(algo) {
+		case LDNS_DSA:
+		case LDNS_DSA_NSEC3:
+			*evp_key = EVP_PKEY_new();
+			if(!*evp_key) {
+				log_err("verify: malloc failure in crypto");
+				return 0;
+			}
+			dsa = sldns_key_buf2dsa_raw(key, keylen);
+			if(!dsa) {
+				verbose(VERB_QUERY, "verify: "
+					"sldns_key_buf2dsa_raw failed");
+				return 0;
+			}
+			if(EVP_PKEY_assign_DSA(*evp_key, dsa) == 0) {
+				verbose(VERB_QUERY, "verify: "
+					"EVP_PKEY_assign_DSA failed");
+				return 0;
+			}
+			*digest_type = EVP_dss1();
+
+			break;
+		case LDNS_RSASHA1:
+		case LDNS_RSASHA1_NSEC3:
+#if defined(HAVE_EVP_SHA256) && defined(USE_SHA2)
+		case LDNS_RSASHA256:
+#endif
+#if defined(HAVE_EVP_SHA512) && defined(USE_SHA2)
+		case LDNS_RSASHA512:
+#endif
+			*evp_key = EVP_PKEY_new();
+			if(!*evp_key) {
+				log_err("verify: malloc failure in crypto");
+				return 0;
+			}
+			rsa = sldns_key_buf2rsa_raw(key, keylen);
+			if(!rsa) {
+				verbose(VERB_QUERY, "verify: "
+					"sldns_key_buf2rsa_raw SHA failed");
+				return 0;
+			}
+			if(EVP_PKEY_assign_RSA(*evp_key, rsa) == 0) {
+				verbose(VERB_QUERY, "verify: "
+					"EVP_PKEY_assign_RSA SHA failed");
+				return 0;
+			}
+
+			/* select SHA version */
+#if defined(HAVE_EVP_SHA256) && defined(USE_SHA2)
+			if(algo == LDNS_RSASHA256)
+				*digest_type = EVP_sha256();
+			else
+#endif
+#if defined(HAVE_EVP_SHA512) && defined(USE_SHA2)
+				if(algo == LDNS_RSASHA512)
+				*digest_type = EVP_sha512();
+			else
+#endif
+				*digest_type = EVP_sha1();
+
+			break;
+		case LDNS_RSAMD5:
+			*evp_key = EVP_PKEY_new();
+			if(!*evp_key) {
+				log_err("verify: malloc failure in crypto");
+				return 0;
+			}
+			rsa = sldns_key_buf2rsa_raw(key, keylen);
+			if(!rsa) {
+				verbose(VERB_QUERY, "verify: "
+					"sldns_key_buf2rsa_raw MD5 failed");
+				return 0;
+			}
+			if(EVP_PKEY_assign_RSA(*evp_key, rsa) == 0) {
+				verbose(VERB_QUERY, "verify: "
+					"EVP_PKEY_assign_RSA MD5 failed");
+				return 0;
+			}
+			*digest_type = EVP_md5();
+
+			break;
+#ifdef USE_GOST
+		case LDNS_ECC_GOST:
+			*evp_key = sldns_gost2pkey_raw(key, keylen);
+			if(!*evp_key) {
+				verbose(VERB_QUERY, "verify: "
+					"sldns_gost2pkey_raw failed");
+				return 0;
+			}
+			*digest_type = EVP_get_digestbyname("md_gost94");
+			if(!*digest_type) {
+				verbose(VERB_QUERY, "verify: "
+					"EVP_getdigest md_gost94 failed");
+				return 0;
+			}
+			break;
+#endif
+#ifdef USE_ECDSA
+		case LDNS_ECDSAP256SHA256:
+			*evp_key = sldns_ecdsa2pkey_raw(key, keylen,
+				LDNS_ECDSAP256SHA256);
+			if(!*evp_key) {
+				verbose(VERB_QUERY, "verify: "
+					"sldns_ecdsa2pkey_raw failed");
+				return 0;
+			}
+#ifdef USE_ECDSA_EVP_WORKAROUND
+			/* openssl before 1.0.0 fixes RSA with the SHA256
+			 * hash in EVP.  We create one for ecdsa_sha256 */
+			{
+				static int md_ecdsa_256_done = 0;
+				static EVP_MD md;
+				if(!md_ecdsa_256_done) {
+					EVP_MD m = *EVP_sha256();
+					md_ecdsa_256_done = 1;
+					m.required_pkey_type[0] = (*evp_key)->type;
+					m.verify = (void*)ECDSA_verify;
+					md = m;
+				}
+				*digest_type = &md;
+			}
+#else
+			*digest_type = EVP_sha256();
+#endif
+			break;
+		case LDNS_ECDSAP384SHA384:
+			*evp_key = sldns_ecdsa2pkey_raw(key, keylen,
+				LDNS_ECDSAP384SHA384);
+			if(!*evp_key) {
+				verbose(VERB_QUERY, "verify: "
+					"sldns_ecdsa2pkey_raw failed");
+				return 0;
+			}
+#ifdef USE_ECDSA_EVP_WORKAROUND
+			/* openssl before 1.0.0 fixes RSA with the SHA384
+			 * hash in EVP.  We create one for ecdsa_sha384 */
+			{
+				static int md_ecdsa_384_done = 0;
+				static EVP_MD md;
+				if(!md_ecdsa_384_done) {
+					EVP_MD m = *EVP_sha384();
+					md_ecdsa_384_done = 1;
+					m.required_pkey_type[0] = (*evp_key)->type;
+					m.verify = (void*)ECDSA_verify;
+					md = m;
+				}
+				*digest_type = &md;
+			}
+#else
+			*digest_type = EVP_sha384();
+#endif
+			break;
+#endif /* USE_ECDSA */
+		default:
+			verbose(VERB_QUERY, "verify: unknown algorithm %d", 
+				algo);
+			return 0;
+	}
+	return 1;
+}
+
+/**
+ * Check a canonical sig+rrset and signature against a dnskey
+ * @param buf: buffer with data to verify, the first rrsig part and the
+ *	canonicalized rrset.
+ * @param algo: DNSKEY algorithm.
+ * @param sigblock: signature rdata field from RRSIG
+ * @param sigblock_len: length of sigblock data.
+ * @param key: public key data from DNSKEY RR.
+ * @param keylen: length of keydata.
+ * @param reason: bogus reason in more detail.
+ * @return secure if verification succeeded, bogus on crypto failure,
+ *	unchecked on format errors and alloc failures.
+ */
+enum sec_status
+verify_canonrrset(sldns_buffer* buf, int algo, unsigned char* sigblock, 
+	unsigned int sigblock_len, unsigned char* key, unsigned int keylen,
+	char** reason)
+{
+	const EVP_MD *digest_type;
+	EVP_MD_CTX ctx;
+	int res, dofree = 0;
+	EVP_PKEY *evp_key = NULL;
+	
+	if(!setup_key_digest(algo, &evp_key, &digest_type, key, keylen)) {
+		verbose(VERB_QUERY, "verify: failed to setup key");
+		*reason = "use of key for crypto failed";
+		EVP_PKEY_free(evp_key);
+		return sec_status_bogus;
+	}
+	/* if it is a DSA signature in bind format, convert to DER format */
+	if((algo == LDNS_DSA || algo == LDNS_DSA_NSEC3) && 
+		sigblock_len == 1+2*SHA_DIGEST_LENGTH) {
+		if(!setup_dsa_sig(&sigblock, &sigblock_len)) {
+			verbose(VERB_QUERY, "verify: failed to setup DSA sig");
+			*reason = "use of key for DSA crypto failed";
+			EVP_PKEY_free(evp_key);
+			return sec_status_bogus;
+		}
+		dofree = 1;
+	}
+#ifdef USE_ECDSA
+	else if(algo == LDNS_ECDSAP256SHA256 || algo == LDNS_ECDSAP384SHA384) {
+		/* EVP uses ASN prefix on sig, which is not in the wire data */
+		if(!setup_ecdsa_sig(&sigblock, &sigblock_len)) {
+			verbose(VERB_QUERY, "verify: failed to setup ECDSA sig");
+			*reason = "use of signature for ECDSA crypto failed";
+			EVP_PKEY_free(evp_key);
+			return sec_status_bogus;
+		}
+		dofree = 1;
+	}
+#endif /* USE_ECDSA */
+
+	/* do the signature cryptography work */
+	EVP_MD_CTX_init(&ctx);
+	if(EVP_VerifyInit(&ctx, digest_type) == 0) {
+		verbose(VERB_QUERY, "verify: EVP_VerifyInit failed");
+		EVP_PKEY_free(evp_key);
+		if(dofree) free(sigblock);
+		return sec_status_unchecked;
+	}
+	if(EVP_VerifyUpdate(&ctx, (unsigned char*)sldns_buffer_begin(buf), 
+		(unsigned int)sldns_buffer_limit(buf)) == 0) {
+		verbose(VERB_QUERY, "verify: EVP_VerifyUpdate failed");
+		EVP_PKEY_free(evp_key);
+		if(dofree) free(sigblock);
+		return sec_status_unchecked;
+	}
+
+	res = EVP_VerifyFinal(&ctx, sigblock, sigblock_len, evp_key);
+	if(EVP_MD_CTX_cleanup(&ctx) == 0) {
+		verbose(VERB_QUERY, "verify: EVP_MD_CTX_cleanup failed");
+		EVP_PKEY_free(evp_key);
+		if(dofree) free(sigblock);
+		return sec_status_unchecked;
+	}
+	EVP_PKEY_free(evp_key);
+
+	if(dofree)
+		free(sigblock);
+
+	if(res == 1) {
+		return sec_status_secure;
+	} else if(res == 0) {
+		verbose(VERB_QUERY, "verify: signature mismatch");
+		*reason = "signature crypto failed";
+		return sec_status_bogus;
+	}
+
+	log_crypto_error("verify:", ERR_get_error());
+	return sec_status_unchecked;
+}
+
+/**************************************************/
+#elif defined(HAVE_NSS)
+/* libnss implementation */
+/* nss3 */
+#include "sechash.h"
+#include "pk11pub.h"
+#include "keyhi.h"
+#include "secerr.h"
+#include "cryptohi.h"
+/* nspr4 */
+#include "prerror.h"
+
+size_t
+ds_digest_size_supported(int algo)
+{
+	/* uses libNSS */
+	switch(algo) {
+		case LDNS_SHA1:
+			return SHA1_LENGTH;
+#ifdef USE_SHA2
+		case LDNS_SHA256:
+			return SHA256_LENGTH;
+#endif
+#ifdef USE_ECDSA
+		case LDNS_SHA384:
+			return SHA384_LENGTH;
+#endif
+		/* GOST not supported in NSS */
+		case LDNS_HASH_GOST:
+		default: break;
+	}
+	return 0;
+}
+
+int
+secalgo_ds_digest(int algo, unsigned char* buf, size_t len,
+	unsigned char* res)
+{
+	/* uses libNSS */
+	switch(algo) {
+		case LDNS_SHA1:
+			return HASH_HashBuf(HASH_AlgSHA1, res, buf, len)
+				== SECSuccess;
+#if defined(USE_SHA2)
+		case LDNS_SHA256:
+			return HASH_HashBuf(HASH_AlgSHA256, res, buf, len)
+				== SECSuccess;
+#endif
+#ifdef USE_ECDSA
+		case LDNS_SHA384:
+			return HASH_HashBuf(HASH_AlgSHA384, res, buf, len)
+				== SECSuccess;
+#endif
+		case LDNS_HASH_GOST:
+		default: 
+			verbose(VERB_QUERY, "unknown DS digest algorithm %d", 
+				algo);
+			break;
+	}
+	return 0;
+}
+
+int
+dnskey_algo_id_is_supported(int id)
+{
+	/* uses libNSS */
+	switch(id) {
+	case LDNS_RSAMD5:
+		/* RFC 6725 deprecates RSAMD5 */
+		return 0;
+	case LDNS_DSA:
+	case LDNS_DSA_NSEC3:
+	case LDNS_RSASHA1:
+	case LDNS_RSASHA1_NSEC3:
+#ifdef USE_SHA2
+	case LDNS_RSASHA256:
+#endif
+#ifdef USE_SHA2
+	case LDNS_RSASHA512:
+#endif
+		return 1;
+#ifdef USE_ECDSA
+	case LDNS_ECDSAP256SHA256:
+	case LDNS_ECDSAP384SHA384:
+		return PK11_TokenExists(CKM_ECDSA);
+#endif
+	case LDNS_ECC_GOST:
+	default:
+		return 0;
+	}
+}
+
+/* return a new public key for NSS */
+static SECKEYPublicKey* nss_key_create(KeyType ktype)
+{
+	SECKEYPublicKey* key;
+	PLArenaPool* arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
+	if(!arena) {
+		log_err("out of memory, PORT_NewArena failed");
+		return NULL;
+	}
+	key = PORT_ArenaZNew(arena, SECKEYPublicKey);
+	if(!key) {
+		log_err("out of memory, PORT_ArenaZNew failed");
+		PORT_FreeArena(arena, PR_FALSE);
+		return NULL;
+	}
+	key->arena = arena;
+	key->keyType = ktype;
+	key->pkcs11Slot = NULL;
+	key->pkcs11ID = CK_INVALID_HANDLE;
+	return key;
+}
+
+static SECKEYPublicKey* nss_buf2ecdsa(unsigned char* key, size_t len, int algo)
+{
+	SECKEYPublicKey* pk;
+	SECItem pub = {siBuffer, NULL, 0};
+	SECItem params = {siBuffer, NULL, 0};
+	static unsigned char param256[] = {
+		/* OBJECTIDENTIFIER 1.2.840.10045.3.1.7 (P-256)
+		 * {iso(1) member-body(2) us(840) ansi-x962(10045) curves(3) prime(1) prime256v1(7)} */
+		0x06, 0x08, 0x2a, 0x86, 0x48, 0xce, 0x3d, 0x03, 0x01, 0x07
+	};
+	static unsigned char param384[] = {
+		/* OBJECTIDENTIFIER 1.3.132.0.34 (P-384)
+		 * {iso(1) identified-organization(3) certicom(132) curve(0) ansip384r1(34)} */
+		0x06, 0x05, 0x2b, 0x81, 0x04, 0x00, 0x22
+	};
+	unsigned char buf[256+2]; /* sufficient for 2*384/8+1 */
+
+	/* check length, which uncompressed must be 2 bignums */
+	if(algo == LDNS_ECDSAP256SHA256) {
+		if(len != 2*256/8) return NULL;
+		/* ECCurve_X9_62_PRIME_256V1 */
+	} else if(algo == LDNS_ECDSAP384SHA384) {
+		if(len != 2*384/8) return NULL;
+		/* ECCurve_X9_62_PRIME_384R1 */
+	} else    return NULL;
+
+	buf[0] = 0x04; /* POINT_FORM_UNCOMPRESSED */
+	memmove(buf+1, key, len);
+	pub.data = buf;
+	pub.len = len+1;
+	if(algo == LDNS_ECDSAP256SHA256) {
+		params.data = param256;
+		params.len = sizeof(param256);
+	} else {
+		params.data = param384;
+		params.len = sizeof(param384);
+	}
+
+	pk = nss_key_create(ecKey);
+	if(!pk)
+		return NULL;
+	pk->u.ec.size = (len/2)*8;
+	if(SECITEM_CopyItem(pk->arena, &pk->u.ec.publicValue, &pub)) {
+		SECKEY_DestroyPublicKey(pk);
+		return NULL;
+	}
+	if(SECITEM_CopyItem(pk->arena, &pk->u.ec.DEREncodedParams, &params)) {
+		SECKEY_DestroyPublicKey(pk);
+		return NULL;
+	}
+
+	return pk;
+}
+
+static SECKEYPublicKey* nss_buf2dsa(unsigned char* key, size_t len)
+{
+	SECKEYPublicKey* pk;
+	uint8_t T;
+	uint16_t length;
+	uint16_t offset;
+	SECItem Q = {siBuffer, NULL, 0};
+	SECItem P = {siBuffer, NULL, 0};
+	SECItem G = {siBuffer, NULL, 0};
+	SECItem Y = {siBuffer, NULL, 0};
+
+	if(len == 0)
+		return NULL;
+	T = (uint8_t)key[0];
+	length = (64 + T * 8);
+	offset = 1;
+
+	if (T > 8) {
+		return NULL;
+	}
+	if(len < (size_t)1 + SHA1_LENGTH + 3*length)
+		return NULL;
+
+	Q.data = key+offset;
+	Q.len = SHA1_LENGTH;
+	offset += SHA1_LENGTH;
+
+	P.data = key+offset;
+	P.len = length;
+	offset += length;
+
+	G.data = key+offset;
+	G.len = length;
+	offset += length;
+
+	Y.data = key+offset;
+	Y.len = length;
+	offset += length;
+
+	pk = nss_key_create(dsaKey);
+	if(!pk)
+		return NULL;
+	if(SECITEM_CopyItem(pk->arena, &pk->u.dsa.params.prime, &P)) {
+		SECKEY_DestroyPublicKey(pk);
+		return NULL;
+	}
+	if(SECITEM_CopyItem(pk->arena, &pk->u.dsa.params.subPrime, &Q)) {
+		SECKEY_DestroyPublicKey(pk);
+		return NULL;
+	}
+	if(SECITEM_CopyItem(pk->arena, &pk->u.dsa.params.base, &G)) {
+		SECKEY_DestroyPublicKey(pk);
+		return NULL;
+	}
+	if(SECITEM_CopyItem(pk->arena, &pk->u.dsa.publicValue, &Y)) {
+		SECKEY_DestroyPublicKey(pk);
+		return NULL;
+	}
+	return pk;
+}
+
+static SECKEYPublicKey* nss_buf2rsa(unsigned char* key, size_t len)
+{
+	SECKEYPublicKey* pk;
+	uint16_t exp;
+	uint16_t offset;
+	uint16_t int16;
+	SECItem modulus = {siBuffer, NULL, 0};
+	SECItem exponent = {siBuffer, NULL, 0};
+	if(len == 0)
+		return NULL;
+	if(key[0] == 0) {
+		if(len < 3)
+			return NULL;
+		/* the exponent is too large so it's places further */
+		memmove(&int16, key+1, 2);
+		exp = ntohs(int16);
+		offset = 3;
+	} else {
+		exp = key[0];
+		offset = 1;
+	}
+
+	/* key length at least one */
+	if(len < (size_t)offset + exp + 1)
+		return NULL;
+	
+	exponent.data = key+offset;
+	exponent.len = exp;
+	offset += exp;
+	modulus.data = key+offset;
+	modulus.len = (len - offset);
+
+	pk = nss_key_create(rsaKey);
+	if(!pk)
+		return NULL;
+	if(SECITEM_CopyItem(pk->arena, &pk->u.rsa.modulus, &modulus)) {
+		SECKEY_DestroyPublicKey(pk);
+		return NULL;
+	}
+	if(SECITEM_CopyItem(pk->arena, &pk->u.rsa.publicExponent, &exponent)) {
+		SECKEY_DestroyPublicKey(pk);
+		return NULL;
+	}
+	return pk;
+}
+
+/**
+ * Setup key and digest for verification. Adjust sig if necessary.
+ *
+ * @param algo: key algorithm
+ * @param evp_key: EVP PKEY public key to create.
+ * @param digest_type: digest type to use
+ * @param key: key to setup for.
+ * @param keylen: length of key.
+ * @param prefix: if returned, the ASN prefix for the hashblob.
+ * @param prefixlen: length of the prefix.
+ * @return false on failure.
+ */
+static int
+nss_setup_key_digest(int algo, SECKEYPublicKey** pubkey, HASH_HashType* htype,
+	unsigned char* key, size_t keylen, unsigned char** prefix,
+	size_t* prefixlen)
+{
+	/* uses libNSS */
+
+	/* hash prefix for md5, RFC2537 */
+	static unsigned char p_md5[] = {0x30, 0x20, 0x30, 0x0c, 0x06, 0x08, 0x2a,
+	0x86, 0x48, 0x86, 0xf7, 0x0d, 0x02, 0x05, 0x05, 0x00, 0x04, 0x10};
+	/* hash prefix to prepend to hash output, from RFC3110 */
+	static unsigned char p_sha1[] = {0x30, 0x21, 0x30, 0x09, 0x06, 0x05, 0x2B,
+		0x0E, 0x03, 0x02, 0x1A, 0x05, 0x00, 0x04, 0x14};
+	/* from RFC5702 */
+	static unsigned char p_sha256[] = {0x30, 0x31, 0x30, 0x0d, 0x06, 0x09, 0x60,
+	0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x01, 0x05, 0x00, 0x04, 0x20};
+	static unsigned char p_sha512[] = {0x30, 0x51, 0x30, 0x0d, 0x06, 0x09, 0x60,
+	0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x03, 0x05, 0x00, 0x04, 0x40};
+	/* from RFC6234 */
+	/* for future RSASHA384 .. 
+	static unsigned char p_sha384[] = {0x30, 0x51, 0x30, 0x0d, 0x06, 0x09, 0x60,
+	0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x02, 0x05, 0x00, 0x04, 0x30};
+	*/
+
+	switch(algo) {
+		case LDNS_DSA:
+		case LDNS_DSA_NSEC3:
+			*pubkey = nss_buf2dsa(key, keylen);
+			if(!*pubkey) {
+				log_err("verify: malloc failure in crypto");
+				return 0;
+			}
+			*htype = HASH_AlgSHA1;
+			/* no prefix for DSA verification */
+			break;
+		case LDNS_RSASHA1:
+		case LDNS_RSASHA1_NSEC3:
+#ifdef USE_SHA2
+		case LDNS_RSASHA256:
+#endif
+#ifdef USE_SHA2
+		case LDNS_RSASHA512:
+#endif
+			*pubkey = nss_buf2rsa(key, keylen);
+			if(!*pubkey) {
+				log_err("verify: malloc failure in crypto");
+				return 0;
+			}
+			/* select SHA version */
+#ifdef USE_SHA2
+			if(algo == LDNS_RSASHA256) {
+				*htype = HASH_AlgSHA256;
+				*prefix = p_sha256;
+				*prefixlen = sizeof(p_sha256);
+			} else
+#endif
+#ifdef USE_SHA2
+				if(algo == LDNS_RSASHA512) {
+				*htype = HASH_AlgSHA512;
+				*prefix = p_sha512;
+				*prefixlen = sizeof(p_sha512);
+			} else
+#endif
+			{
+				*htype = HASH_AlgSHA1;
+				*prefix = p_sha1;
+				*prefixlen = sizeof(p_sha1);
+			}
+
+			break;
+		case LDNS_RSAMD5:
+			*pubkey = nss_buf2rsa(key, keylen);
+			if(!*pubkey) {
+				log_err("verify: malloc failure in crypto");
+				return 0;
+			}
+			*htype = HASH_AlgMD5;
+			*prefix = p_md5;
+			*prefixlen = sizeof(p_md5);
+
+			break;
+#ifdef USE_ECDSA
+		case LDNS_ECDSAP256SHA256:
+			*pubkey = nss_buf2ecdsa(key, keylen,
+				LDNS_ECDSAP256SHA256);
+			if(!*pubkey) {
+				log_err("verify: malloc failure in crypto");
+				return 0;
+			}
+			*htype = HASH_AlgSHA256;
+			/* no prefix for DSA verification */
+			break;
+		case LDNS_ECDSAP384SHA384:
+			*pubkey = nss_buf2ecdsa(key, keylen,
+				LDNS_ECDSAP384SHA384);
+			if(!*pubkey) {
+				log_err("verify: malloc failure in crypto");
+				return 0;
+			}
+			*htype = HASH_AlgSHA384;
+			/* no prefix for DSA verification */
+			break;
+#endif /* USE_ECDSA */
+		case LDNS_ECC_GOST:
+		default:
+			verbose(VERB_QUERY, "verify: unknown algorithm %d", 
+				algo);
+			return 0;
+	}
+	return 1;
+}
+
+/**
+ * Check a canonical sig+rrset and signature against a dnskey
+ * @param buf: buffer with data to verify, the first rrsig part and the
+ *	canonicalized rrset.
+ * @param algo: DNSKEY algorithm.
+ * @param sigblock: signature rdata field from RRSIG
+ * @param sigblock_len: length of sigblock data.
+ * @param key: public key data from DNSKEY RR.
+ * @param keylen: length of keydata.
+ * @param reason: bogus reason in more detail.
+ * @return secure if verification succeeded, bogus on crypto failure,
+ *	unchecked on format errors and alloc failures.
+ */
+enum sec_status
+verify_canonrrset(sldns_buffer* buf, int algo, unsigned char* sigblock, 
+	unsigned int sigblock_len, unsigned char* key, unsigned int keylen,
+	char** reason)
+{
+	/* uses libNSS */
+	/* large enough for the different hashes */
+	unsigned char hash[HASH_LENGTH_MAX];
+	unsigned char hash2[HASH_LENGTH_MAX*2];
+	HASH_HashType htype = 0;
+	SECKEYPublicKey* pubkey = NULL;
+	SECItem secsig = {siBuffer, sigblock, sigblock_len};
+	SECItem sechash = {siBuffer, hash, 0};
+	SECStatus res;
+	unsigned char* prefix = NULL; /* prefix for hash, RFC3110, RFC5702 */
+	size_t prefixlen = 0;
+	int err;
+
+	if(!nss_setup_key_digest(algo, &pubkey, &htype, key, keylen,
+		&prefix, &prefixlen)) {
+		verbose(VERB_QUERY, "verify: failed to setup key");
+		*reason = "use of key for crypto failed";
+		SECKEY_DestroyPublicKey(pubkey);
+		return sec_status_bogus;
+	}
+
+	/* need to convert DSA, ECDSA signatures? */
+	if((algo == LDNS_DSA || algo == LDNS_DSA_NSEC3)) {
+		if(sigblock_len == 1+2*SHA1_LENGTH) {
+			secsig.data ++;
+			secsig.len --;
+		} else {
+			SECItem* p = DSAU_DecodeDerSig(&secsig);
+			if(!p) {
+				verbose(VERB_QUERY, "verify: failed DER decode");
+				*reason = "signature DER decode failed";
+				SECKEY_DestroyPublicKey(pubkey);
+				return sec_status_bogus;
+			}
+			if(SECITEM_CopyItem(pubkey->arena, &secsig, p)) {
+				log_err("alloc failure in DER decode");
+				SECKEY_DestroyPublicKey(pubkey);
+				SECITEM_FreeItem(p, PR_TRUE);
+				return sec_status_unchecked;
+			}
+			SECITEM_FreeItem(p, PR_TRUE);
+		}
+	}
+
+	/* do the signature cryptography work */
+	/* hash the data */
+	sechash.len = HASH_ResultLen(htype);
+	if(sechash.len > sizeof(hash)) {
+		verbose(VERB_QUERY, "verify: hash too large for buffer");
+		SECKEY_DestroyPublicKey(pubkey);
+		return sec_status_unchecked;
+	}
+	if(HASH_HashBuf(htype, hash, (unsigned char*)sldns_buffer_begin(buf),
+		(unsigned int)sldns_buffer_limit(buf)) != SECSuccess) {
+		verbose(VERB_QUERY, "verify: HASH_HashBuf failed");
+		SECKEY_DestroyPublicKey(pubkey);
+		return sec_status_unchecked;
+	}
+	if(prefix) {
+		int hashlen = sechash.len;
+		if(prefixlen+hashlen > sizeof(hash2)) {
+			verbose(VERB_QUERY, "verify: hashprefix too large");
+			SECKEY_DestroyPublicKey(pubkey);
+			return sec_status_unchecked;
+		}
+		sechash.data = hash2;
+		sechash.len = prefixlen+hashlen;
+		memcpy(sechash.data, prefix, prefixlen);
+		memmove(sechash.data+prefixlen, hash, hashlen);
+	}
+
+	/* verify the signature */
+	res = PK11_Verify(pubkey, &secsig, &sechash, NULL /*wincx*/);
+	SECKEY_DestroyPublicKey(pubkey);
+
+	if(res == SECSuccess) {
+		return sec_status_secure;
+	}
+	err = PORT_GetError();
+	if(err != SEC_ERROR_BAD_SIGNATURE) {
+		/* failed to verify */
+		verbose(VERB_QUERY, "verify: PK11_Verify failed: %s",
+			PORT_ErrorToString(err));
+		/* if it is not supported, like ECC is removed, we get,
+		 * SEC_ERROR_NO_MODULE */
+		if(err == SEC_ERROR_NO_MODULE)
+			return sec_status_unchecked;
+		/* but other errors are commonly returned
+		 * for a bad signature from NSS.  Thus we return bogus,
+		 * not unchecked */
+		*reason = "signature crypto failed";
+		return sec_status_bogus;
+	}
+	verbose(VERB_QUERY, "verify: signature mismatch: %s",
+		PORT_ErrorToString(err));
+	*reason = "signature crypto failed";
+	return sec_status_bogus;
+}
+
+
+#endif /* HAVE_SSL or HAVE_NSS */