fuzz: fuzz gnutls_handshake_write

Signed-off-by: Daiki Ueno <ueno@gnu.org>

6 files changed, 313 insertions, 1 deletions

diff --git a/fuzz/Makefile.am b/fuzz/Makefile.am
index cf7fab1072..f5e5c64db8 100644
--- a/fuzz/Makefile.am
+++ b/fuzz/Makefile.am
@@ -33,7 +33,9 @@ FUZZERS = \
  gnutls_x509_crl_parser_fuzzer$(EXEEXT) \
  gnutls_x509_crq_parser_fuzzer$(EXEEXT) \
  gnutls_x509_parser_fuzzer$(EXEEXT) \
- gnutls_ext_raw_parse_fuzzer$(EXEEXT)
+ gnutls_ext_raw_parse_fuzzer$(EXEEXT) \
+ gnutls_handshake_client_fuzzer$(EXEEXT) \
+ gnutls_handshake_server_fuzzer$(EXEEXT)
 
 check_PROGRAMS = $(FUZZERS)
 
@@ -43,6 +45,7 @@ gnutls_base64_decoder_fuzzer_SOURCES = gnutls_base64_decoder_fuzzer.c $(COMMON_S
 gnutls_base64_encoder_fuzzer_SOURCES = gnutls_base64_encoder_fuzzer.c $(COMMON_SOURCES)
 gnutls_client_fuzzer_SOURCES = gnutls_client_fuzzer.c $(COMMON_SOURCES) mem.h certs.h
 gnutls_client_rawpk_fuzzer_SOURCES = gnutls_client_rawpk_fuzzer.c $(COMMON_SOURCES) mem.h certs.h
+gnutls_handshake_client_fuzzer_SOURCES = gnutls_handshake_client_fuzzer.c $(COMMON_SOURCES) handshake.h
 gnutls_dn_parser_fuzzer_SOURCES = gnutls_dn_parser_fuzzer.c $(COMMON_SOURCES)
 gnutls_idna_parser_fuzzer_SOURCES = gnutls_idna_parser_fuzzer.c $(COMMON_SOURCES)
 gnutls_ocsp_req_parser_fuzzer_SOURCES = gnutls_ocsp_req_parser_fuzzer.c $(COMMON_SOURCES)
@@ -56,6 +59,7 @@ gnutls_psk_server_fuzzer_SOURCES = gnutls_psk_server_fuzzer.c $(COMMON_SOURCES)
 gnutls_reverse_idna_parser_fuzzer_SOURCES = gnutls_reverse_idna_parser_fuzzer.c $(COMMON_SOURCES)
 gnutls_server_fuzzer_SOURCES = gnutls_server_fuzzer.c $(COMMON_SOURCES) mem.h certs.h
 gnutls_server_rawpk_fuzzer_SOURCES = gnutls_server_rawpk_fuzzer.c $(COMMON_SOURCES) mem.h certs.h
+gnutls_handshake_server_fuzzer_SOURCES = gnutls_handshake_server_fuzzer.c $(COMMON_SOURCES) handshake.h certs.h
 gnutls_srp_client_fuzzer_SOURCES = gnutls_srp_client_fuzzer.c $(COMMON_SOURCES) mem.h srp.h
 gnutls_srp_server_fuzzer_SOURCES = gnutls_srp_server_fuzzer.c $(COMMON_SOURCES) mem.h srp.h
 gnutls_set_trust_file_fuzzer_SOURCES = gnutls_set_trust_file_fuzzer.c $(COMMON_SOURCES)
diff --git a/fuzz/gnutls_handshake_client_fuzzer.c b/fuzz/gnutls_handshake_client_fuzzer.c
new file mode 100644
index 0000000000..8ae5babdc0
--- /dev/null
+++ b/fuzz/gnutls_handshake_client_fuzzer.c
@@ -0,0 +1,85 @@
+/*
+# Copyright 2016 Google Inc.
+# Copyright 2017 Red Hat, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+################################################################################
+*/
+
+#include <assert.h>
+#include <fcntl.h>
+#include <stdint.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdbool.h>
+
+#include <gnutls/crypto.h>
+#include <gnutls/gnutls.h>
+#include "handshake.h"
+#include "fuzzer.h"
+
+int __attribute__ ((visibility ("protected")))
+gnutls_rnd(gnutls_rnd_level_t level, void *data, size_t len)
+{
+	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;
+}
+
+int LLVMFuzzerTestOneInput(const uint8_t * data, size_t size)
+{
+	int res;
+	gnutls_session_t session;
+	gnutls_certificate_credentials_t xcred;
+	struct mem_st memdata;
+
+	res = gnutls_init(&session, GNUTLS_CLIENT);
+	assert(res >= 0);
+
+	res = gnutls_certificate_allocate_credentials(&xcred);
+	assert(res >= 0);
+	res = gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, xcred);
+	assert(res >= 0);
+
+	/*res = gnutls_set_default_priority(session);*/
+	res = gnutls_priority_set_direct(session, "NORMAL:-VERS-TLS-ALL:+VERS-TLS1.3", NULL);
+	assert(res >= 0);
+
+	memdata.data = data;
+	memdata.size = size;
+
+	gnutls_transport_set_push_function(session, error_push);
+	gnutls_transport_set_pull_function(session, error_pull);
+	gnutls_handshake_set_read_function(session, handshake_discard);
+
+	do {
+		res = gnutls_handshake(session);
+		if (res == GNUTLS_E_AGAIN) {
+			if (handshake_pull(session, &memdata) < 0) {
+				res = GNUTLS_E_INTERNAL_ERROR;
+				break;
+			}
+		}
+	} while (res < 0 && gnutls_error_is_fatal(res) == 0);
+
+	gnutls_deinit(session);
+	gnutls_certificate_free_credentials(xcred);
+	return 0;
+}
diff --git a/fuzz/gnutls_handshake_client_fuzzer.in/b8bf41c354dcafcd24d437e5a26b666a2cbea58c357b24e9e5549c1ec1d5bfda b/fuzz/gnutls_handshake_client_fuzzer.in/b8bf41c354dcafcd24d437e5a26b666a2cbea58c357b24e9e5549c1ec1d5bfda
new file mode 100644
index 0000000000..6873151b9b
--- /dev/null
+++ b/fuzz/gnutls_handshake_client_fuzzer.in/b8bf41c354dcafcd24d437e5a26b666a2cbea58c357b24e9e5549c1ec1d5bfda
diff --git a/fuzz/gnutls_handshake_server_fuzzer.c b/fuzz/gnutls_handshake_server_fuzzer.c
new file mode 100644
index 0000000000..06b4218dc7
--- /dev/null
+++ b/fuzz/gnutls_handshake_server_fuzzer.c
@@ -0,0 +1,130 @@
+/*
+# Copyright 2017 Red Hat, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+################################################################################
+*/
+
+#include <assert.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include <gnutls/crypto.h>
+#include <gnutls/gnutls.h>
+
+#include "certs.h"
+#include "handshake.h"
+#include "fuzzer.h"
+
+int __attribute__ ((visibility ("protected")))
+gnutls_rnd(gnutls_rnd_level_t level, void *data, size_t len)
+{
+	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;
+}
+
+int LLVMFuzzerTestOneInput(const uint8_t * data, size_t size)
+{
+	int res;
+	gnutls_datum_t rsa_cert, rsa_key;
+	gnutls_datum_t ecdsa_cert, ecdsa_key;
+	gnutls_datum_t ed25519_cert, ed25519_key;
+	gnutls_datum_t ed448_cert, ed448_key;
+	gnutls_session_t session;
+	gnutls_certificate_credentials_t xcred;
+	struct mem_st memdata;
+
+	res = gnutls_init(&session, GNUTLS_SERVER);
+	assert(res >= 0);
+
+	res = gnutls_certificate_allocate_credentials(&xcred);
+	assert(res >= 0);
+
+	rsa_cert.data = (unsigned char *)kRSACertificateDER;
+	rsa_cert.size = sizeof(kRSACertificateDER);
+	rsa_key.data = (unsigned char *)kRSAPrivateKeyDER;
+	rsa_key.size = sizeof(kRSAPrivateKeyDER);
+
+	ecdsa_cert.data = (unsigned char *)kECDSACertificateDER;
+	ecdsa_cert.size = sizeof(kECDSACertificateDER);
+	ecdsa_key.data = (unsigned char *)kECDSAPrivateKeyDER;
+	ecdsa_key.size = sizeof(kECDSAPrivateKeyDER);
+
+	ed25519_cert.data = (unsigned char *)kEd25519CertificateDER;
+	ed25519_cert.size = sizeof(kEd25519CertificateDER);
+	ed25519_key.data = (unsigned char *)kEd25519PrivateKeyDER;
+	ed25519_key.size = sizeof(kEd25519PrivateKeyDER);
+
+	ed448_cert.data = (unsigned char *)kEd448CertificateDER;
+	ed448_cert.size = sizeof(kEd448CertificateDER);
+	ed448_key.data = (unsigned char *)kEd448PrivateKeyDER;
+	ed448_key.size = sizeof(kEd448PrivateKeyDER);
+
+	res =
+		gnutls_certificate_set_x509_key_mem(xcred, &rsa_cert, &rsa_key,
+		GNUTLS_X509_FMT_DER);
+	assert(res >= 0);
+
+	res =
+		gnutls_certificate_set_x509_key_mem(xcred, &ecdsa_cert, &ecdsa_key,
+		GNUTLS_X509_FMT_DER);
+	assert(res >= 0);
+
+	res =
+		gnutls_certificate_set_x509_key_mem(xcred, &ed25519_cert, &ed25519_key,
+		GNUTLS_X509_FMT_DER);
+	assert(res >= 0);
+
+	res =
+		gnutls_certificate_set_x509_key_mem(xcred, &ed448_cert, &ed448_key,
+		GNUTLS_X509_FMT_DER);
+	assert(res >= 0);
+
+	gnutls_certificate_set_known_dh_params(xcred, GNUTLS_SEC_PARAM_MEDIUM);
+
+	res = gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, xcred);
+	assert(res >= 0);
+
+	/*res = gnutls_set_default_priority(session);*/
+	res = gnutls_priority_set_direct(session, "NORMAL:-VERS-TLS-ALL:+VERS-TLS1.3", NULL);
+	assert(res >= 0);
+
+	memdata.data = data;
+	memdata.size = size;
+
+	gnutls_transport_set_push_function(session, error_push);
+	gnutls_transport_set_pull_function(session, error_pull);
+	gnutls_handshake_set_read_function(session, handshake_discard);
+
+	do {
+		res = gnutls_handshake(session);
+		if (res == GNUTLS_E_AGAIN) {
+			if (handshake_pull(session, &memdata) < 0) {
+				res = GNUTLS_E_INTERNAL_ERROR;
+				break;
+			}
+		}
+	} while (res < 0 && gnutls_error_is_fatal(res) == 0);
+
+	gnutls_deinit(session);
+	gnutls_certificate_free_credentials(xcred);
+	return 0;
+}
diff --git a/fuzz/gnutls_handshake_server_fuzzer.in/455834990de124995c50d9d19439062dcedd17249ff24f5ed93bf74d72f3b2db b/fuzz/gnutls_handshake_server_fuzzer.in/455834990de124995c50d9d19439062dcedd17249ff24f5ed93bf74d72f3b2db
new file mode 100644
index 0000000000..0372d3efd9
--- /dev/null
+++ b/fuzz/gnutls_handshake_server_fuzzer.in/455834990de124995c50d9d19439062dcedd17249ff24f5ed93bf74d72f3b2db
diff --git a/fuzz/handshake.h b/fuzz/handshake.h
new file mode 100644
index 0000000000..72f26e9ea2
--- /dev/null
+++ b/fuzz/handshake.h
@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 2017 Nikos Mavrogiannopoulos
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+#ifndef HANDSHAKE_H
+# define HANDSHAKE_H
+
+typedef struct mem_st {
+	const uint8_t *data;
+	size_t size;
+} mem_st;
+
+static ssize_t
+error_push(gnutls_transport_ptr_t tr, const void *data, size_t len)
+{
+	return -1;
+}
+
+static ssize_t
+error_pull(gnutls_transport_ptr_t tr, void *data, size_t len)
+{
+	return -1;
+}
+
+static int
+handshake_discard(gnutls_session_t session,
+		  gnutls_record_encryption_level_t level,
+		  gnutls_handshake_description_t htype,
+		  const void *data, size_t data_size)
+{
+	return 0;
+}
+
+static int
+handshake_pull(gnutls_session_t session, mem_st *data)
+{
+	uint32_t level, size;
+	int ret;
+
+	if (data->size < 4) {
+		return -1;
+	}
+
+	level = (data->data[0] << 24) | (data->data[1] << 16) |
+		(data->data[2] << 8) | data->data[3];
+
+	data->size -= 4;
+	data->data += 4;
+
+	if (data->size < 4) {
+		return -1;
+	}
+
+	size = (data->data[0] << 24) | (data->data[1] << 16) |
+		(data->data[2] << 8) | data->data[3];
+
+	data->size -= 4;
+	data->data += 4;
+
+	if (size > data->size) {
+		return -1;
+	}
+
+	ret = gnutls_handshake_write(session,
+				     (gnutls_record_encryption_level_t)level,
+				     data->data,
+				     size);
+	data->size -= size;
+	data->data += size;
+
+	return ret;
+}
+
+#endif