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tests: New style fuzzing tools for TLS client/server

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These are newer versions of tests/test-tls tool.

Signed-off-by: Jouni Malinen <j@w1.fi>
master
Jouni Malinen 5 years ago
parent d005d3647b
commit 98612544b1
6 changed files with 361 additions and 0 deletions
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25
tests/fuzzing/tls-client/Makefile
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all: tls-client
include ../rules.include
LIBS += $(SRC)/common/libcommon.a
LIBS += $(SRC)/crypto/libcrypto.a
LIBS += $(SRC)/tls/libtls.a
LIBS += $(SRC)/rsn_supp/librsn_supp.a
LIBS += $(SRC)/eapol_supp/libeapol_supp.a
LIBS += $(SRC)/eap_peer/libeap_peer.a
LIBS += $(SRC)/eap_common/libeap_common.a
LIBS += $(SRC)/l2_packet/libl2_packet.a
LIBS += $(SRC)/utils/libutils.a
ELIBS += $(SRC)/crypto/libcrypto.a
ELIBS += $(SRC)/tls/libtls.a
tls-client: tls-client.o $(OBJS) $(LIBS)
$(LDO) $(LDFLAGS) -o $@ $^ $(LIBS) $(ELIBS)
clean:
$(MAKE) -C $(SRC) clean
$(MAKE) -C $(WPAS_SRC) clean
rm -f tls-client *~ *.o *.d ../*~ ../*.o ../*.d
-include $(OBJS:%.o=%.d)

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tests/fuzzing/tls-client/corpus/server.msg
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154
tests/fuzzing/tls-client/tls-client.c
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/*
* Testing tool for TLSv1 client routines
* Copyright (c) 2019, Jouni Malinen <j@w1.fi>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#include "includes.h"
#include "common.h"
#include "crypto/tls.h"
#include "../fuzzer-common.h"
#ifndef CERTDIR
#define CERTDIR "../../hwsim/auth_serv/"
#endif
struct context {
const u8 *data;
size_t data_len;
size_t data_offset;
};
static struct wpabuf * read_msg(struct context *ctx)
{
u16 msg_len;
struct wpabuf *msg;
if (ctx->data_len - ctx->data_offset < 2) {
wpa_printf(MSG_ERROR, "TEST-ERROR: Could not read msg len");
return NULL;
}
msg_len = WPA_GET_BE16(&ctx->data[ctx->data_offset]);
ctx->data_offset += 2;
msg = wpabuf_alloc(msg_len);
if (!msg)
return NULL;
if (msg_len > 0 && ctx->data_len - ctx->data_offset < msg_len) {
wpa_printf(MSG_ERROR, "TEST-ERROR: Truncated msg (msg_len=%u)",
msg_len);
wpabuf_free(msg);
return NULL;
}
wpabuf_put_data(msg, &ctx->data[ctx->data_offset], msg_len);
ctx->data_offset += msg_len;
wpa_hexdump_buf(MSG_DEBUG, "TEST: Read message from file", msg);
return msg;
}
int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
{
struct context ctx;
struct tls_config conf;
void *tls_client;
struct tls_connection_params params;
struct tls_connection *conn_client = NULL;
int ret = -1;
struct wpabuf *in = NULL, *out = NULL, *appl;
wpa_fuzzer_set_debug_level();
os_memset(&ctx, 0, sizeof(ctx));
ctx.data = data;
ctx.data_len = size;
os_memset(&conf, 0, sizeof(conf));
tls_client = tls_init(&conf);
if (!tls_client)
goto fail;
os_memset(&params, 0, sizeof(params));
params.ca_cert = CERTDIR "ca.pem";
params.client_cert = CERTDIR "server.pem";
params.private_key = CERTDIR "server.key";
params.dh_file = CERTDIR "dh.conf";
conn_client = tls_connection_init(tls_client);
if (!conn_client)
goto fail;
in = NULL;
for (;;) {
appl = NULL;
out = tls_connection_handshake(tls_client, conn_client, in,
&appl);
wpabuf_free(in);
in = NULL;
if (!out)
goto fail;
if (tls_connection_get_failed(tls_client, conn_client)) {
wpa_printf(MSG_ERROR, "TLS handshake failed");
goto fail;
}
if (tls_connection_established(tls_client, conn_client))
break;
appl = NULL;
in = read_msg(&ctx);
wpabuf_free(out);
out = NULL;
if (!in)
goto fail;
if (tls_connection_established(tls_client, conn_client))
break;
}
wpabuf_free(in);
in = wpabuf_alloc(100);
if (!in)
goto fail;
wpabuf_put_str(in, "PING");
wpabuf_free(out);
out = tls_connection_encrypt(tls_client, conn_client, in);
wpabuf_free(in);
in = NULL;
if (!out)
goto fail;
wpabuf_free(in);
in = wpabuf_alloc(100);
if (!in)
goto fail;
wpabuf_put_str(in, "PONG");
wpabuf_free(out);
out = read_msg(&ctx);
wpabuf_free(in);
in = NULL;
if (!out)
goto fail;
in = tls_connection_decrypt(tls_client, conn_client, out);
wpabuf_free(out);
out = NULL;
if (!in)
goto fail;
wpa_hexdump_buf(MSG_DEBUG, "Client decrypted ApplData", in);
ret = 0;
fail:
if (tls_client) {
if (conn_client)
tls_connection_deinit(tls_client, conn_client);
tls_deinit(tls_client);
}
wpabuf_free(in);
wpabuf_free(out);
return ret;
}

25
tests/fuzzing/tls-server/Makefile
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all: tls-server
include ../rules.include
LIBS += $(SRC)/common/libcommon.a
LIBS += $(SRC)/crypto/libcrypto.a
LIBS += $(SRC)/tls/libtls.a
LIBS += $(SRC)/rsn_supp/librsn_supp.a
LIBS += $(SRC)/eapol_supp/libeapol_supp.a
LIBS += $(SRC)/eap_peer/libeap_peer.a
LIBS += $(SRC)/eap_common/libeap_common.a
LIBS += $(SRC)/l2_packet/libl2_packet.a
LIBS += $(SRC)/utils/libutils.a
ELIBS += $(SRC)/crypto/libcrypto.a
ELIBS += $(SRC)/tls/libtls.a
tls-server: tls-server.o $(OBJS) $(LIBS)
$(LDO) $(LDFLAGS) -o $@ $^ $(LIBS) $(ELIBS)
clean:
$(MAKE) -C $(SRC) clean
$(MAKE) -C $(WPAS_SRC) clean
rm -f tls-server *~ *.o *.d ../*~ ../*.o ../*.d
-include $(OBJS:%.o=%.d)

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tests/fuzzing/tls-server/corpus/client.msg
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157
tests/fuzzing/tls-server/tls-server.c
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/*
* Testing tool for TLSv1 server routines
* Copyright (c) 2019, Jouni Malinen <j@w1.fi>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#include "includes.h"
#include "common.h"
#include "crypto/tls.h"
#include "../fuzzer-common.h"
#ifndef CERTDIR
#define CERTDIR "../../hwsim/auth_serv/"
#endif
struct context {
const u8 *data;
size_t data_len;
size_t data_offset;
};
static struct wpabuf * read_msg(struct context *ctx)
{
u16 msg_len;
struct wpabuf *msg;
if (ctx->data_len - ctx->data_offset < 2) {
wpa_printf(MSG_ERROR, "TEST-ERROR: Could not read msg len");
return NULL;
}
msg_len = WPA_GET_BE16(&ctx->data[ctx->data_offset]);
ctx->data_offset += 2;
msg = wpabuf_alloc(msg_len);
if (!msg)
return NULL;
if (msg_len > 0 && ctx->data_len - ctx->data_offset < msg_len) {
wpa_printf(MSG_ERROR, "TEST-ERROR: Truncated msg (msg_len=%u)",
msg_len);
wpabuf_free(msg);
return NULL;
}
wpabuf_put_data(msg, &ctx->data[ctx->data_offset], msg_len);
ctx->data_offset += msg_len;
wpa_hexdump_buf(MSG_DEBUG, "TEST: Read message from file", msg);
return msg;
}
int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
{
struct context ctx;
struct tls_config conf;
void *tls_server;
struct tls_connection_params params;
struct tls_connection *conn_server = NULL;
int ret = -1;
struct wpabuf *in = NULL, *out = NULL, *appl;
wpa_fuzzer_set_debug_level();
os_memset(&ctx, 0, sizeof(ctx));
ctx.data = data;
ctx.data_len = size;
os_memset(&conf, 0, sizeof(conf));
tls_server = tls_init(&conf);
if (!tls_server)
goto fail;
os_memset(&params, 0, sizeof(params));
params.ca_cert = CERTDIR "ca.pem";
params.client_cert = CERTDIR "server.pem";
params.private_key = CERTDIR "server.key";
params.dh_file = CERTDIR "dh.conf";
if (tls_global_set_params(tls_server, &params)) {
wpa_printf(MSG_ERROR, "Failed to set TLS parameters");
goto fail;
}
conn_server = tls_connection_init(tls_server);
if (!conn_server)
goto fail;
in = NULL;
for (;;) {
appl = NULL;
out = read_msg(&ctx);
wpabuf_free(in);
in = NULL;
if (!out)
goto fail;
appl = NULL;
in = tls_connection_server_handshake(tls_server, conn_server,
out, &appl);
wpabuf_free(out);
out = NULL;
if (!in)
goto fail;
if (tls_connection_get_failed(tls_server, conn_server)) {
wpa_printf(MSG_ERROR, "TLS handshake failed");
goto fail;
}
if (tls_connection_established(tls_server, conn_server))
break;
}
wpabuf_free(in);
in = wpabuf_alloc(100);
if (!in)
goto fail;
wpabuf_put_str(in, "PING");
wpabuf_free(out);
out = read_msg(&ctx);
wpabuf_free(in);
in = NULL;
if (!out)
goto fail;
in = tls_connection_decrypt(tls_server, conn_server, out);
wpabuf_free(out);
out = NULL;
if (!in)
goto fail;
wpa_hexdump_buf(MSG_DEBUG, "Server decrypted ApplData", in);
wpabuf_free(in);
in = wpabuf_alloc(100);
if (!in)
goto fail;
wpabuf_put_str(in, "PONG");
wpabuf_free(out);
out = tls_connection_encrypt(tls_server, conn_server, in);
wpabuf_free(in);
in = NULL;
if (!out)
goto fail;
ret = 0;
fail:
if (tls_server) {
if (conn_server)
tls_connection_deinit(tls_server, conn_server);
tls_deinit(tls_server);
}
wpabuf_free(in);
wpabuf_free(out);
return ret;
}
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