1 files changed, 376 insertions, 0 deletions
diff --git a/tests/tls13/prf.c b/tests/tls13/prf.c
new file mode 100644
index 0000000..a83fda5
--- /dev/null
+++ b/tests/tls13/prf.c
@@ -0,0 +1,376 @@
+/*
+ * Copyright (C) 2015-2018 Red Hat, Inc.
+ *
+ * This file is part of GnuTLS.
+ *
+ * GnuTLS 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 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 Lesser General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#if !defined(__linux__) || !defined(__GNUC__)
+
+int main(int argc, char **argv)
+{
+	exit(77);
+}
+
+#else
+
+#include <string.h>
+#include <sys/types.h>
+#include <netinet/in.h>
+#include <sys/socket.h>
+#include <sys/wait.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+#include <gnutls/gnutls.h>
+#include <gnutls/crypto.h>
+
+#include "cert-common.h"
+#include "utils.h"
+
+static void terminate(void);
+
+/* This program tests whether the gnutls_prf() works as
+ * expected.
+ */
+
+static void server_log_func(int level, const char *str)
+{
+	fprintf(stderr, "server|<%d>| %s", level, str);
+}
+
+static void client_log_func(int level, const char *str)
+{
+	fprintf(stderr, "client|<%d>| %s", level, str);
+}
+
+/* These are global */
+static pid_t child;
+
+static const
+gnutls_datum_t hrnd = {(void*)"\x00\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 32};
+static const
+gnutls_datum_t hsrnd = {(void*)"\x00\x05\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 32};
+
+static int gnutls_rnd_works;
+
+int __attribute__ ((visibility ("protected")))
+gnutls_rnd(gnutls_rnd_level_t level, void *data, size_t len)
+{
+	gnutls_rnd_works = 1;
+
+	memset(data, 0xff, len);
+
+	/* Flip the first byte to avoid infinite loop in the RSA
+	 * blinding code of Nettle */
+	if (len > 0)
+		memset(data, 0x0, 1);
+	return 0;
+}
+
+static void dump(const char *name, const uint8_t *data, unsigned data_size)
+{
+	unsigned i;
+
+	fprintf(stderr, "%s", name);
+	for (i=0;i<data_size;i++)
+		fprintf(stderr, "\\x%.2x", (unsigned)data[i]);
+	fprintf(stderr, "\n");
+}
+
+#define TRY(label_size, label, extra_size, extra, size, exp) \
+	{ \
+	ret = gnutls_prf_rfc5705(session, label_size, label, extra_size, extra, size, \
+			 (void*)key_material); \
+	if (ret < 0) { \
+		fprintf(stderr, "gnutls_prf_rfc5705: error in %d\n", __LINE__); \
+		gnutls_perror(ret); \
+		exit(1); \
+	} \
+	if (memcmp(key_material, exp, size) != 0) { \
+		fprintf(stderr, "gnutls_prf_rfc5705: output doesn't match for '%s'\n", label); \
+		dump("got ", key_material, size); \
+		dump("expected ", exp, size); \
+		exit(1); \
+	} \
+	}
+
+#define TRY_OLD(label_size, label, size, exp) \
+	{ \
+	ret = gnutls_prf(session, label_size, label, 0, 0, NULL, size, \
+			 (void*)key_material); \
+	if (ret < 0) { \
+		fprintf(stderr, "gnutls_prf: error in %d\n", __LINE__); \
+		gnutls_perror(ret); \
+		exit(1); \
+	} \
+	if (memcmp(key_material, exp, size) != 0) { \
+		fprintf(stderr, "gnutls_prf: output doesn't match for '%s'\n", label); \
+		dump("got ", key_material, size); \
+		dump("expected ", exp, size); \
+		exit(1); \
+	} \
+	}
+
+#define KEY_EXP_VALUE "\x28\x70\xa8\x34\xd4\x43\x85\xfd\x55\xe0\x13\x78\x75\xa3\x25\xa7\xfd\x0b\x6b\x68\x5d\x62\x72\x02\xdf\x3d\x79\xca\x55\xab\xea\x24\xf3\x4d"
+#define HELLO_VALUE "\xd8\xcb\x72\x1e\x24\x2d\x79\x11\x41\x38\x05\x2b\x1b\x5d\x60\x12\x30\x0a\xf7\x1e\x23\x90\x4d\x64\xf8\xf5\x23\xea\xbf\xa3\x24"
+#define CONTEXT_VALUE "\xe6\xc0\x57\xbe\xda\x28\x9c\xc7\xf6\x4f\xb6\x18\x92\xce\x10\xf6\xe1\x5e\xab\x10\xc8\xd1\x94\xf8\xac\xc7\x3e\x93\xde\x57\x12"
+#define NULL_CONTEXT_VALUE "\xaf\xea\xd2\x64\xc9\x42\xbd\xe7\xdb\xf0\xd3\x16\x84\x39\xf3\xdb\x5d\x4f\x0e\x5e\x71\x1e\xc0\xd7\x23\xde\x8b\x1e\x80\xa1\xca"
+static void check_prfs(gnutls_session_t session)
+{
+	unsigned char key_material[512];
+	int ret;
+
+	if (!gnutls_rnd_works) {
+		fprintf(stderr, "gnutls_rnd() could not be overridden, see #584\n");
+		exit(77);
+	}
+
+	TRY_OLD(13, "key expansion", 34, (uint8_t*)KEY_EXP_VALUE);
+	TRY_OLD(6, "hello", 31, (uint8_t*)HELLO_VALUE);
+
+	TRY(13, "key expansion", 0, NULL, 34, (uint8_t*)KEY_EXP_VALUE);
+	TRY(6, "hello", 0, NULL, 31, (uint8_t*)HELLO_VALUE);
+	TRY(7, "context", 5, "abcd\xfa", 31, (uint8_t*)CONTEXT_VALUE);
+	TRY(12, "null-context", 0, "", 31, (uint8_t*)NULL_CONTEXT_VALUE);
+
+	/* Try whether calling gnutls_prf() with non-null context or server-first
+	 * param, will fail */
+	ret = gnutls_prf(session, 3, (void*)"xxx", 0, 3, (void*)"yyy", 16, (void*)key_material);
+	if (ret != GNUTLS_E_INVALID_REQUEST)
+		fail("gnutls_prf: succeeded under TLS1.3!\n");
+
+	ret = gnutls_prf(session, 3, (void*)"xxx", 1, 0, NULL, 16, (void*)key_material);
+	if (ret != GNUTLS_E_INVALID_REQUEST)
+		fail("gnutls_prf: succeeded under TLS1.3!\n");
+}
+
+static void client(int fd)
+{
+	gnutls_session_t session;
+	int ret;
+	gnutls_certificate_credentials_t clientx509cred;
+	const char *err;
+	/* Need to enable anonymous KX specifically. */
+
+	global_init();
+
+	if (debug) {
+		gnutls_global_set_log_function(client_log_func);
+		gnutls_global_set_log_level(4711);
+	}
+
+	gnutls_certificate_allocate_credentials(&clientx509cred);
+
+	/* Initialize TLS session
+	 */
+	gnutls_init(&session, GNUTLS_CLIENT);
+
+	/* Use default priorities */
+	ret = gnutls_priority_set_direct(session,
+				   "NONE:+VERS-TLS1.3:+AES-256-GCM:+AEAD:+SIGN-RSA-PSS-RSAE-SHA384:+GROUP-SECP256R1",
+				   &err);
+	if (ret < 0) {
+		fail("client: priority set failed (%s): %s\n",
+		     gnutls_strerror(ret), err);
+		exit(1);
+	}
+
+	ret = gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE,
+				clientx509cred);
+	if (ret < 0)
+		exit(1);
+
+	gnutls_handshake_set_random(session, &hrnd);
+	gnutls_transport_set_int(session, fd);
+
+	/* Perform the TLS handshake
+	 */
+	do {
+		ret = gnutls_handshake(session);
+	}
+	while (ret < 0 && gnutls_error_is_fatal(ret) == 0);
+
+	if (ret < 0) {
+		fail("client: Handshake failed: %s\n", strerror(ret));
+		exit(1);
+	} else {
+		if (debug)
+			success("client: Handshake was completed\n");
+	}
+
+	if (debug)
+		success("client: TLS version is: %s\n",
+			gnutls_protocol_get_name
+			(gnutls_protocol_get_version(session)));
+
+	ret = gnutls_cipher_get(session);
+	if (ret != GNUTLS_CIPHER_AES_256_GCM) {
+		fprintf(stderr, "negotiated unexpected cipher: %s\n", gnutls_cipher_get_name(ret));
+		exit(1);
+	}
+
+	ret = gnutls_mac_get(session);
+	if (ret != GNUTLS_MAC_AEAD) {
+		fprintf(stderr, "negotiated unexpected mac: %s\n", gnutls_mac_get_name(ret));
+		exit(1);
+	}
+
+	ret = gnutls_prf_hash_get(session);
+	if (ret != GNUTLS_DIG_SHA384) {
+		fprintf(stderr, "negotiated unexpected hash: %s\n", gnutls_digest_get_name(ret));
+		exit(1);
+	}
+
+	check_prfs(session);
+
+	gnutls_bye(session, GNUTLS_SHUT_WR);
+
+	close(fd);
+
+	gnutls_deinit(session);
+
+	gnutls_certificate_free_credentials(clientx509cred);
+
+	gnutls_global_deinit();
+}
+
+static void terminate(void)
+{
+	int status = 0;
+
+	if (child) {
+		kill(child, SIGTERM);
+		wait(&status);
+	}
+	exit(1);
+}
+
+static void server(int fd)
+{
+	int ret;
+	gnutls_session_t session;
+	gnutls_certificate_credentials_t serverx509cred;
+
+	/* this must be called once in the program
+	 */
+	global_init();
+
+	if (debug) {
+		gnutls_global_set_log_function(server_log_func);
+		gnutls_global_set_log_level(4711);
+	}
+
+	gnutls_certificate_allocate_credentials(&serverx509cred);
+
+	gnutls_init(&session, GNUTLS_SERVER);
+
+	/* avoid calling all the priority functions, since the defaults
+	 * are adequate.
+	 */
+	ret = gnutls_priority_set_direct(session,
+				   "NORMAL:-VERS-ALL:+VERS-TLS1.3:-KX-ALL:-SIGN-ALL:+SIGN-RSA-PSS-RSAE-SHA384:-GROUP-ALL:+GROUP-SECP256R1", NULL);
+	if (ret < 0) {
+		fail("server: priority set failed (%s)\n\n",
+		     gnutls_strerror(ret));
+		terminate();
+	}
+
+	gnutls_certificate_set_x509_key_mem(serverx509cred,
+					    &server_cert, &server_key,
+					    GNUTLS_X509_FMT_PEM);
+	gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE,
+				serverx509cred);
+
+	gnutls_handshake_set_random(session, &hsrnd);
+	gnutls_transport_set_int(session, fd);
+
+	do {
+		ret = gnutls_handshake(session);
+	}
+	while (ret < 0 && gnutls_error_is_fatal(ret) == 0);
+	if (ret < 0) {
+		close(fd);
+		gnutls_deinit(session);
+		fail("server: Handshake has failed (%s)\n\n",
+		     gnutls_strerror(ret));
+		terminate();
+	}
+	if (debug)
+		success("server: Handshake was completed\n");
+
+	if (debug)
+		success("server: TLS version is: %s\n",
+			gnutls_protocol_get_name
+			(gnutls_protocol_get_version(session)));
+
+	check_prfs(session);
+
+	/* do not wait for the peer to close the connection.
+	 */
+	gnutls_bye(session, GNUTLS_SHUT_WR);
+
+	close(fd);
+	gnutls_deinit(session);
+
+	gnutls_certificate_free_credentials(serverx509cred);
+
+	gnutls_global_deinit();
+
+	if (debug)
+		success("server: finished\n");
+}
+
+void doit(void)
+{
+	int fd[2];
+	int ret;
+
+	signal(SIGPIPE, SIG_IGN);
+
+	ret = socketpair(AF_UNIX, SOCK_STREAM, 0, fd);
+	if (ret < 0) {
+		perror("socketpair");
+		exit(1);
+	}
+
+	child = fork();
+	if (child < 0) {
+		perror("fork");
+		fail("fork");
+		exit(1);
+	}
+
+	if (child) {
+		int status = 0;
+		/* parent */
+
+		server(fd[0]);
+		wait(&status);
+		check_wait_status(status);
+	} else {
+		close(fd[0]);
+		client(fd[1]);
+		exit(0);
+	}
+}
+
+#endif				/* _WIN32 */