Adding upstream version 3.7.9.upstream/3.7.9upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 854 insertions, 0 deletions

diff --git a/extra/gnutls_openssl.c b/extra/gnutls_openssl.c
new file mode 100644
index 0000000..ba53733
--- /dev/null
+++ b/extra/gnutls_openssl.c
@@ -0,0 +1,854 @@
+/*
+ * Copyright (C) 2004-2012 Free Software Foundation, Inc.
+ * Copyright (c) 2002 Andrew McDonald <andrew@mcdonald.org.uk>
+ *
+ * This file is part of GnuTLS-EXTRA.
+ *
+ * GnuTLS-extra is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *               
+ * GnuTLS-extra is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *                               
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+
+#include <gnutls/gnutls.h>
+#include <openssl_compat.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "../lib/gnutls_int.h"
+#include "../lib/random.h"
+#include "../lib/hash_int.h"
+
+/* In win32 X509_NAME is defined in wincrypt.h.
+ * undefine it to avoid the conflict with openssl.h.
+ */
+#ifdef X509_NAME
+#undef X509_NAME
+#endif
+#include <gnutls/openssl.h>
+
+/* Gnulib re-defines shutdown on mingw.  We only use it as a variable
+   name, so restore the original name. */
+#undef shutdown
+
+/* XXX: See lib/gnutls_int.h. */
+#define GNUTLS_POINTER_TO_INT(_) ((int) GNUTLS_POINTER_TO_INT_CAST (_))
+#define GNUTLS_INT_TO_POINTER(_) ((void*) GNUTLS_POINTER_TO_INT_CAST (_))
+
+/* WARNING: Error functions aren't currently thread-safe */
+
+static int last_error = 0;
+
+/* Library initialisation functions */
+
+int SSL_library_init(void)
+{
+	gnutls_global_init();
+	/* NB: we haven't got anywhere to call gnutls_global_deinit() */
+	return 1;
+}
+
+void OpenSSL_add_all_algorithms(void)
+{
+}
+
+
+/* SSL_CTX structure handling */
+
+SSL_CTX *SSL_CTX_new(SSL_METHOD * method)
+{
+	SSL_CTX *ctx;
+
+	ctx = (SSL_CTX *) calloc(1, sizeof(SSL_CTX));
+	if (!ctx)
+		return NULL;
+
+	ctx->method = method;
+
+	return ctx;
+}
+
+void SSL_CTX_free(SSL_CTX * ctx)
+{
+	free(ctx->method);
+	free(ctx);
+}
+
+int SSL_CTX_set_default_verify_paths(SSL_CTX * ctx)
+{
+	return 0;
+}
+
+int
+SSL_CTX_use_certificate_file(SSL_CTX * ctx, const char *certfile, int type)
+{
+	ctx->certfile = (char *) calloc(1, strlen(certfile) + 1);
+	if (!ctx->certfile)
+		return -1;
+	memcpy(ctx->certfile, certfile, strlen(certfile));
+
+	ctx->certfile_type = type;
+
+	return 1;
+}
+
+int
+SSL_CTX_use_PrivateKey_file(SSL_CTX * ctx, const char *keyfile, int type)
+{
+	ctx->keyfile = (char *) calloc(1, strlen(keyfile) + 1);
+	if (!ctx->keyfile)
+		return -1;
+	memcpy(ctx->keyfile, keyfile, strlen(keyfile));
+
+	ctx->keyfile_type = type;
+
+	return 1;
+
+}
+
+void
+SSL_CTX_set_verify(SSL_CTX * ctx, int verify_mode,
+		   int (*verify_callback) (int, X509_STORE_CTX *))
+{
+	ctx->verify_mode = verify_mode;
+	ctx->verify_callback = verify_callback;
+}
+
+unsigned long SSL_CTX_set_options(SSL_CTX * ctx, unsigned long options)
+{
+	return (ctx->options |= options);
+}
+
+long SSL_CTX_set_mode(SSL_CTX * ctx, long mode)
+{
+	return 0;
+}
+
+int SSL_CTX_set_cipher_list(SSL_CTX * ctx, const char *list)
+{
+	/* FIXME: ignore this for the moment */
+	/* We're going to have to parse the "list" string to do this */
+	/* It is a string, which in its simplest form is something like
+	   "DES-CBC3-SHA:IDEA-CBC-MD5", but can be rather more complicated
+	   (see OpenSSL's ciphers(1) manpage for details) */
+
+	return 1;
+}
+
+
+/* SSL_CTX statistics */
+
+long SSL_CTX_sess_number(SSL_CTX * ctx)
+{
+	return 0;
+}
+
+long SSL_CTX_sess_connect(SSL_CTX * ctx)
+{
+	return 0;
+}
+
+long SSL_CTX_sess_connect_good(SSL_CTX * ctx)
+{
+	return 0;
+}
+
+long SSL_CTX_sess_connect_renegotiate(SSL_CTX * ctx)
+{
+	return 0;
+}
+
+long SSL_CTX_sess_accept(SSL_CTX * ctx)
+{
+	return 0;
+}
+
+long SSL_CTX_sess_accept_good(SSL_CTX * ctx)
+{
+	return 0;
+}
+
+long SSL_CTX_sess_accept_renegotiate(SSL_CTX * ctx)
+{
+	return 0;
+}
+
+long SSL_CTX_sess_hits(SSL_CTX * ctx)
+{
+	return 0;
+}
+
+long SSL_CTX_sess_misses(SSL_CTX * ctx)
+{
+	return 0;
+}
+
+long SSL_CTX_sess_timeouts(SSL_CTX * ctx)
+{
+	return 0;
+}
+
+
+
+/* SSL structure handling */
+
+SSL *SSL_new(SSL_CTX * ctx)
+{
+	SSL *ssl;
+	int err;
+
+	ssl = (SSL *) calloc(1, sizeof(SSL));
+	if (!ssl)
+		return NULL;
+
+	err = gnutls_certificate_allocate_credentials(&ssl->gnutls_cred);
+	if (err < 0) {
+		last_error = err;
+		free(ssl);
+		return NULL;
+	}
+
+	gnutls_init(&ssl->gnutls_state, ctx->method->connend);
+
+	gnutls_priority_set_direct(ssl->gnutls_state,
+				   ctx->method->priority_string, NULL);
+
+	gnutls_credentials_set(ssl->gnutls_state, GNUTLS_CRD_CERTIFICATE,
+			       ssl->gnutls_cred);
+	if (ctx->certfile)
+		gnutls_certificate_set_x509_trust_file(ssl->gnutls_cred,
+						       ctx->certfile,
+						       ctx->certfile_type);
+	if (ctx->keyfile)
+		gnutls_certificate_set_x509_key_file(ssl->gnutls_cred,
+						     ctx->certfile,
+						     ctx->keyfile,
+						     ctx->keyfile_type);
+	ssl->ctx = ctx;
+	ssl->verify_mode = ctx->verify_mode;
+	ssl->verify_callback = ctx->verify_callback;
+
+	ssl->options = ctx->options;
+
+	ssl->rfd = (gnutls_transport_ptr_t) - 1;
+	ssl->wfd = (gnutls_transport_ptr_t) - 1;
+
+	return ssl;
+}
+
+void SSL_free(SSL * ssl)
+{
+	gnutls_certificate_free_credentials(ssl->gnutls_cred);
+	gnutls_deinit(ssl->gnutls_state);
+	free(ssl);
+}
+
+void SSL_load_error_strings(void)
+{
+}
+
+int SSL_get_error(SSL * ssl, int ret)
+{
+	if (ret > 0)
+		return SSL_ERROR_NONE;
+
+	return SSL_ERROR_ZERO_RETURN;
+}
+
+int SSL_set_fd(SSL * ssl, int fd)
+{
+	gnutls_transport_set_ptr(ssl->gnutls_state,
+				 GNUTLS_INT_TO_POINTER(fd));
+	return 1;
+}
+
+int SSL_set_rfd(SSL * ssl, int fd)
+{
+	ssl->rfd = GNUTLS_INT_TO_POINTER(fd);
+
+	if (ssl->wfd != (gnutls_transport_ptr_t) - 1)
+		gnutls_transport_set_ptr2(ssl->gnutls_state, ssl->rfd,
+					  ssl->wfd);
+
+	return 1;
+}
+
+int SSL_set_wfd(SSL * ssl, int fd)
+{
+	ssl->wfd = GNUTLS_INT_TO_POINTER(fd);
+
+	if (ssl->rfd != (gnutls_transport_ptr_t) - 1)
+		gnutls_transport_set_ptr2(ssl->gnutls_state, ssl->rfd,
+					  ssl->wfd);
+
+	return 1;
+}
+
+void SSL_set_bio(SSL * ssl, BIO * rbio, BIO * wbio)
+{
+	gnutls_transport_set_ptr2(ssl->gnutls_state, rbio->fd, wbio->fd);
+	/*    free(BIO); ? */
+}
+
+void SSL_set_connect_state(SSL * ssl)
+{
+}
+
+int SSL_pending(SSL * ssl)
+{
+	return gnutls_record_check_pending(ssl->gnutls_state);
+}
+
+void
+SSL_set_verify(SSL * ssl, int verify_mode,
+	       int (*verify_callback) (int, X509_STORE_CTX *))
+{
+	ssl->verify_mode = verify_mode;
+	ssl->verify_callback = verify_callback;
+}
+
+const X509 *SSL_get_peer_certificate(SSL * ssl)
+{
+	const gnutls_datum_t *cert_list;
+	unsigned int cert_list_size = 0;
+
+	cert_list = gnutls_certificate_get_peers(ssl->gnutls_state,
+						 &cert_list_size);
+
+	return cert_list;
+}
+
+/* SSL connection open/close/read/write functions */
+
+int SSL_connect(SSL * ssl)
+{
+	X509_STORE_CTX *store;
+	unsigned int cert_list_size = 0;
+	int err;
+	char x_priority[256];
+	/* take options into account before connecting */
+
+	memset(x_priority, 0, sizeof(x_priority));
+	if (ssl->options & SSL_OP_NO_TLSv1) {
+		snprintf(x_priority, sizeof(x_priority), "%s:-VERS-TLS1.0",
+			 ssl->ctx->method->priority_string);
+		err =
+		    gnutls_priority_set_direct(ssl->gnutls_state,
+					       x_priority, NULL);
+		if (err < 0) {
+			last_error = err;
+			return 0;
+		}
+	}
+
+	err = gnutls_handshake(ssl->gnutls_state);
+	ssl->last_error = err;
+
+	if (err < 0) {
+		last_error = err;
+		return 0;
+	}
+
+	store = (X509_STORE_CTX *) calloc(1, sizeof(X509_STORE_CTX));
+	if (!store)
+		return 0;
+
+	store->ssl = ssl;
+	store->cert_list = gnutls_certificate_get_peers(ssl->gnutls_state,
+							&cert_list_size);
+
+	if (ssl->verify_callback) {
+		ssl->verify_callback(1 /*FIXME*/, store);
+	}
+	ssl->state = SSL_ST_OK;
+
+	err = store->error;
+	free(store);
+
+	/* FIXME: deal with error from callback */
+
+	return 1;
+}
+
+int SSL_accept(SSL * ssl)
+{
+	X509_STORE_CTX *store;
+	unsigned int cert_list_size = 0;
+	int err;
+	char x_priority[256];
+	/* take options into account before connecting */
+
+	memset(x_priority, 0, sizeof(x_priority));
+	if (ssl->options & SSL_OP_NO_TLSv1) {
+		snprintf(x_priority, sizeof(x_priority), "%s:-VERS-TLS1.0",
+			 ssl->ctx->method->priority_string);
+		err =
+		    gnutls_priority_set_direct(ssl->gnutls_state,
+					       x_priority, NULL);
+		if (err < 0) {
+			last_error = err;
+			return 0;
+		}
+	}
+
+	/* FIXME: dh params, do we want client cert? */
+
+	err = gnutls_handshake(ssl->gnutls_state);
+	ssl->last_error = err;
+
+	if (err < 0) {
+		last_error = err;
+		return 0;
+	}
+
+	store = (X509_STORE_CTX *) calloc(1, sizeof(X509_STORE_CTX));
+	if (!store)
+		return 0;
+	store->ssl = ssl;
+	store->cert_list = gnutls_certificate_get_peers(ssl->gnutls_state,
+							&cert_list_size);
+
+	if (ssl->verify_callback) {
+		ssl->verify_callback(1 /*FIXME*/, store);
+	}
+	ssl->state = SSL_ST_OK;
+
+	err = store->error;
+	free(store);
+
+	/* FIXME: deal with error from callback */
+
+	return 1;
+}
+
+int SSL_shutdown(SSL * ssl)
+{
+	if (!ssl->shutdown) {
+		gnutls_bye(ssl->gnutls_state, GNUTLS_SHUT_WR);
+		ssl->shutdown++;
+	} else {
+		gnutls_bye(ssl->gnutls_state, GNUTLS_SHUT_RDWR);
+		ssl->shutdown++;
+	}
+
+	/* FIXME */
+	return 1;
+}
+
+int SSL_read(SSL * ssl, void *buf, int len)
+{
+	int ret;
+
+	ret = gnutls_record_recv(ssl->gnutls_state, buf, len);
+	ssl->last_error = ret;
+
+	if (ret < 0) {
+		last_error = ret;
+		return 0;
+	}
+
+	return ret;
+}
+
+int SSL_write(SSL * ssl, const void *buf, int len)
+{
+	int ret;
+
+	ret = gnutls_record_send(ssl->gnutls_state, buf, len);
+	ssl->last_error = ret;
+
+	if (ret < 0) {
+		last_error = ret;
+		return 0;
+	}
+
+	return ret;
+}
+
+int SSL_want(SSL * ssl)
+{
+	return SSL_NOTHING;
+}
+
+
+/* SSL_METHOD functions */
+
+SSL_METHOD *SSLv23_client_method(void)
+{
+	SSL_METHOD *m;
+	m = (SSL_METHOD *) calloc(1, sizeof(SSL_METHOD));
+	if (!m)
+		return NULL;
+
+	strcpy(m->priority_string,
+	       "NORMAL");
+
+	m->connend = GNUTLS_CLIENT;
+
+	return m;
+}
+
+SSL_METHOD *SSLv23_server_method(void)
+{
+	SSL_METHOD *m;
+	m = (SSL_METHOD *) calloc(1, sizeof(SSL_METHOD));
+	if (!m)
+		return NULL;
+
+	strcpy(m->priority_string,
+	       "NORMAL");
+	m->connend = GNUTLS_SERVER;
+
+	return m;
+}
+
+SSL_METHOD *SSLv3_client_method(void)
+{
+	SSL_METHOD *m;
+	m = (SSL_METHOD *) calloc(1, sizeof(SSL_METHOD));
+	if (!m)
+		return NULL;
+
+	strcpy(m->priority_string,
+	       "NONE:+VERS-SSL3.0:+CIPHER-ALL:+COMP-ALL:+RSA:+DHE-RSA:+DHE-DSS:+MAC-ALL");
+	m->connend = GNUTLS_CLIENT;
+
+	return m;
+}
+
+SSL_METHOD *SSLv3_server_method(void)
+{
+	SSL_METHOD *m;
+	m = (SSL_METHOD *) calloc(1, sizeof(SSL_METHOD));
+	if (!m)
+		return NULL;
+
+	strcpy(m->priority_string,
+	       "NONE:+VERS-SSL3.0:+CIPHER-ALL:+COMP-ALL:+RSA:+DHE-RSA:+DHE-DSS:+MAC-ALL");
+	m->connend = GNUTLS_SERVER;
+
+	return m;
+}
+
+SSL_METHOD *TLSv1_client_method(void)
+{
+	SSL_METHOD *m;
+	m = (SSL_METHOD *) calloc(1, sizeof(SSL_METHOD));
+	if (!m)
+		return NULL;
+
+	strcpy(m->priority_string,
+	       "NONE:+VERS-TLS1.0:+CIPHER-ALL:+COMP-ALL:+RSA:+DHE-RSA:+DHE-DSS:+MAC-ALL");
+	m->connend = GNUTLS_CLIENT;
+
+	return m;
+}
+
+SSL_METHOD *TLSv1_server_method(void)
+{
+	SSL_METHOD *m;
+	m = (SSL_METHOD *) calloc(1, sizeof(SSL_METHOD));
+	if (!m)
+		return NULL;
+
+	strcpy(m->priority_string,
+	       "NONE:+VERS-TLS1.0:+CIPHER-ALL:+COMP-ALL:+RSA:+DHE-RSA:+DHE-DSS:+MAC-ALL");
+	m->connend = GNUTLS_SERVER;
+
+	return m;
+}
+
+
+/* SSL_CIPHER functions */
+
+SSL_CIPHER *SSL_get_current_cipher(SSL * ssl)
+{
+	if (!ssl)
+		return NULL;
+
+	ssl->ciphersuite.version =
+	    gnutls_protocol_get_version(ssl->gnutls_state);
+	ssl->ciphersuite.cipher = gnutls_cipher_get(ssl->gnutls_state);
+	ssl->ciphersuite.kx = gnutls_kx_get(ssl->gnutls_state);
+	ssl->ciphersuite.mac = gnutls_mac_get(ssl->gnutls_state);
+	ssl->ciphersuite.compression =
+	    gnutls_compression_get(ssl->gnutls_state);
+	ssl->ciphersuite.cert =
+	    gnutls_certificate_type_get(ssl->gnutls_state);
+
+	return &(ssl->ciphersuite);
+}
+
+const char *SSL_CIPHER_get_name(SSL_CIPHER * cipher)
+{
+	if (!cipher)
+		return ("NONE");
+
+	return gnutls_cipher_suite_get_name(cipher->kx,
+					    cipher->cipher, cipher->mac);
+}
+
+int SSL_CIPHER_get_bits(SSL_CIPHER * cipher, int *bits)
+{
+	int bit_result;
+
+	if (!cipher)
+		return 0;
+
+	bit_result = (8 * gnutls_cipher_get_key_size(cipher->cipher));
+
+	if (bits)
+		*bits = bit_result;
+
+	return bit_result;
+}
+
+const char *SSL_CIPHER_get_version(SSL_CIPHER * cipher)
+{
+	const char *ret;
+
+	if (!cipher)
+		return ("(NONE)");
+
+	ret = gnutls_protocol_get_name(cipher->version);
+	if (ret)
+		return ret;
+
+	return ("unknown");
+}
+
+char *SSL_CIPHER_description(SSL_CIPHER * cipher, char *buf, int size)
+{
+	char *tmpbuf;
+	int tmpsize;
+	int local_alloc;
+
+	if (buf) {
+		tmpbuf = buf;
+		tmpsize = size;
+		local_alloc = 0;
+	} else {
+		tmpbuf = (char *) malloc(128);
+		tmpsize = 128;
+		local_alloc = 1;
+	}
+
+	if (snprintf(tmpbuf, tmpsize, "%s %s %s %s",
+		     gnutls_protocol_get_name(cipher->version),
+		     gnutls_kx_get_name(cipher->kx),
+		     gnutls_cipher_get_name(cipher->cipher),
+		     gnutls_mac_get_name(cipher->mac)) == -1) {
+		if (local_alloc)
+			free(tmpbuf);
+		return (char *) "Buffer too small";
+	}
+
+	return tmpbuf;
+}
+
+
+/* X509 functions */
+
+X509_NAME *X509_get_subject_name(const X509 * cert)
+{
+	gnutls_x509_dn *dn;
+	dn = (gnutls_x509_dn *) calloc(1, sizeof(gnutls_x509_dn));
+	if (!dn)
+		return (NULL);
+	if (gnutls_x509_extract_certificate_dn(cert, dn) < 0) {
+		free(dn);
+		return NULL;
+	}
+	return dn;
+}
+
+X509_NAME *X509_get_issuer_name(const X509 * cert)
+{
+	gnutls_x509_dn *dn;
+	dn = (gnutls_x509_dn *) calloc(1, sizeof(gnutls_x509_dn));
+	if (!dn)
+		return (NULL);
+	if (gnutls_x509_extract_certificate_issuer_dn(cert, dn) < 0) {
+		free(dn);
+		return NULL;
+	}
+	return dn;
+}
+
+char *X509_NAME_oneline(gnutls_x509_dn * name, char *buf, int len)
+{
+	/* XXX openssl allocates buffer if buf == NULL */
+	if (!buf)
+		return NULL;
+	memset(buf, 0, len);
+
+	snprintf(buf, len - 1,
+		 "C=%s, ST=%s, L=%s, O=%s, OU=%s, CN=%s/Email=%s",
+		 name->country, name->state_or_province_name,
+		 name->locality_name, name->organization,
+		 name->organizational_unit_name, name->common_name,
+		 name->email);
+	return buf;
+}
+
+void X509_free(const X509 * cert)
+{
+	/* only get certificates as const items */
+}
+
+
+/* BIO functions */
+
+void BIO_get_fd(gnutls_session_t gnutls_state, int *fd)
+{
+	gnutls_transport_ptr_t tmp =
+	    gnutls_transport_get_ptr(gnutls_state);
+	*fd = GNUTLS_POINTER_TO_INT(tmp);
+}
+
+BIO *BIO_new_socket(int sock, int close_flag)
+{
+	BIO *bio;
+
+	bio = (BIO *) malloc(sizeof(BIO));
+	if (!bio)
+		return NULL;
+
+	bio->fd = GNUTLS_INT_TO_POINTER(sock);
+
+	return bio;
+}
+
+
+/* error handling */
+
+unsigned long ERR_get_error(void)
+{
+	unsigned long ret;
+
+	ret = -1 * last_error;
+	last_error = 0;
+
+	return ret;
+}
+
+const char *ERR_error_string(unsigned long e, char *buf)
+{
+	return gnutls_strerror(-1 * e);
+}
+
+
+/* RAND functions */
+
+int RAND_status(void)
+{
+	return 1;
+}
+
+void RAND_seed(const void *buf, int num)
+{
+}
+
+int RAND_bytes(unsigned char *buf, int num)
+{
+	gnutls_rnd(GNUTLS_RND_RANDOM, buf, num);
+	return 1;
+}
+
+int RAND_pseudo_bytes(unsigned char *buf, int num)
+{
+	gnutls_rnd(GNUTLS_RND_NONCE, buf, num);
+	return 1;
+}
+
+const char *RAND_file_name(char *buf, size_t len)
+{
+	return "";
+}
+
+int RAND_load_file(const char *name, long maxbytes)
+{
+	return maxbytes;
+}
+
+int RAND_write_file(const char *name)
+{
+	return 0;
+}
+
+int RAND_egd_bytes(const char *path, int bytes)
+{
+	/* fake it */
+	return bytes;
+}
+
+
+/* message digest functions */
+
+void MD5_Init(MD5_CTX * ctx)
+{
+	int ret;
+	ret = gnutls_hash_init((void *) &ctx->handle, GNUTLS_DIG_MD5);
+	if (ret < 0)
+		abort();
+}
+
+void MD5_Update(MD5_CTX * ctx, const void *buf, int len)
+{
+	gnutls_hash(ctx->handle, buf, len);
+}
+
+void MD5_Final(unsigned char *md, MD5_CTX * ctx)
+{
+	gnutls_hash_deinit(ctx->handle, md);
+}
+
+unsigned char *MD5(const unsigned char *buf, unsigned long len,
+		   unsigned char *md)
+{
+	if (!md)
+		return NULL;
+
+	gnutls_hash_fast(GNUTLS_DIG_MD5, buf, len, md);
+
+	return md;
+}
+
+void RIPEMD160_Init(RIPEMD160_CTX * ctx)
+{
+	int ret;
+	ret = gnutls_hash_init((void *) &ctx->handle, GNUTLS_DIG_RMD160);
+	if (ret < 0)
+		abort();
+}
+
+void RIPEMD160_Update(RIPEMD160_CTX * ctx, const void *buf, int len)
+{
+	gnutls_hash(ctx->handle, buf, len);
+}
+
+void RIPEMD160_Final(unsigned char *md, RIPEMD160_CTX * ctx)
+{
+	gnutls_hash_deinit(ctx->handle, md);
+}
+
+unsigned char *RIPEMD160(const unsigned char *buf, unsigned long len,
+			 unsigned char *md)
+{
+	if (!md)
+		return NULL;
+
+	gnutls_hash_fast(GNUTLS_DIG_RMD160, buf, len, md);
+
+	return md;
+}