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openssl/test/servername_test.c

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C
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/*
* Copyright 2017-2019 The OpenSSL Project Authors. All Rights Reserved.
* Copyright 2017 BaishanCloud. All rights reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <string.h>
#include <openssl/opensslconf.h>
#include <openssl/bio.h>
#include <openssl/crypto.h>
#include <openssl/evp.h>
#include <openssl/ssl.h>
#include <openssl/err.h>
#include <time.h>
#include "../ssl/packet_local.h"
#include "testutil.h"
#include "internal/nelem.h"
#include "ssltestlib.h"
#define CLIENT_VERSION_LEN 2
static const char *host = "dummy-host";
static char *cert = NULL;
static char *privkey = NULL;
static int get_sni_from_client_hello(BIO *bio, char **sni)
{
long len;
unsigned char *data;
PACKET pkt = {0}, pkt2 = {0}, pkt3 = {0}, pkt4 = {0}, pkt5 = {0};
unsigned int servname_type = 0, type = 0;
int ret = 0;
len = BIO_get_mem_data(bio, (char **)&data);
if (!TEST_true(PACKET_buf_init(&pkt, data, len))
/* Skip the record header */
|| !PACKET_forward(&pkt, SSL3_RT_HEADER_LENGTH)
/* Skip the handshake message header */
|| !TEST_true(PACKET_forward(&pkt, SSL3_HM_HEADER_LENGTH))
/* Skip client version and random */
|| !TEST_true(PACKET_forward(&pkt, CLIENT_VERSION_LEN
+ SSL3_RANDOM_SIZE))
/* Skip session id */
|| !TEST_true(PACKET_get_length_prefixed_1(&pkt, &pkt2))
/* Skip ciphers */
|| !TEST_true(PACKET_get_length_prefixed_2(&pkt, &pkt2))
/* Skip compression */
|| !TEST_true(PACKET_get_length_prefixed_1(&pkt, &pkt2))
/* Extensions len */
|| !TEST_true(PACKET_as_length_prefixed_2(&pkt, &pkt2)))
goto end;
/* Loop through all extensions for SNI */
while (PACKET_remaining(&pkt2)) {
if (!TEST_true(PACKET_get_net_2(&pkt2, &type))
|| !TEST_true(PACKET_get_length_prefixed_2(&pkt2, &pkt3)))
goto end;
if (type == TLSEXT_TYPE_server_name) {
if (!TEST_true(PACKET_get_length_prefixed_2(&pkt3, &pkt4))
|| !TEST_uint_ne(PACKET_remaining(&pkt4), 0)
|| !TEST_true(PACKET_get_1(&pkt4, &servname_type))
|| !TEST_uint_eq(servname_type, TLSEXT_NAMETYPE_host_name)
|| !TEST_true(PACKET_get_length_prefixed_2(&pkt4, &pkt5))
|| !TEST_uint_le(PACKET_remaining(&pkt5), TLSEXT_MAXLEN_host_name)
|| !TEST_false(PACKET_contains_zero_byte(&pkt5))
|| !TEST_true(PACKET_strndup(&pkt5, sni)))
goto end;
ret = 1;
goto end;
}
}
end:
return ret;
}
static int client_setup_sni_before_state(void)
{
SSL_CTX *ctx;
SSL *con = NULL;
BIO *rbio;
BIO *wbio;
char *hostname = NULL;
int ret = 0;
/* use TLS_method to blur 'side' */
ctx = SSL_CTX_new(TLS_method());
if (!TEST_ptr(ctx))
goto end;
con = SSL_new(ctx);
if (!TEST_ptr(con))
goto end;
/* set SNI before 'client side' is set */
SSL_set_tlsext_host_name(con, host);
rbio = BIO_new(BIO_s_mem());
wbio = BIO_new(BIO_s_mem());
if (!TEST_ptr(rbio)|| !TEST_ptr(wbio)) {
BIO_free(rbio);
BIO_free(wbio);
goto end;
}
SSL_set_bio(con, rbio, wbio);
if (!TEST_int_le(SSL_connect(con), 0))
/* This shouldn't succeed because we don't have a server! */
goto end;
if (!TEST_true(get_sni_from_client_hello(wbio, &hostname)))
/* no SNI in client hello */
goto end;
if (!TEST_str_eq(hostname, host))
/* incorrect SNI value */
goto end;
ret = 1;
end:
OPENSSL_free(hostname);
SSL_free(con);
SSL_CTX_free(ctx);
return ret;
}
static int client_setup_sni_after_state(void)
{
SSL_CTX *ctx;
SSL *con = NULL;
BIO *rbio;
BIO *wbio;
char *hostname = NULL;
int ret = 0;
/* use TLS_method to blur 'side' */
ctx = SSL_CTX_new(TLS_method());
if (!TEST_ptr(ctx))
goto end;
con = SSL_new(ctx);
if (!TEST_ptr(con))
goto end;
rbio = BIO_new(BIO_s_mem());
wbio = BIO_new(BIO_s_mem());
if (!TEST_ptr(rbio)|| !TEST_ptr(wbio)) {
BIO_free(rbio);
BIO_free(wbio);
goto end;
}
SSL_set_bio(con, rbio, wbio);
SSL_set_connect_state(con);
/* set SNI after 'client side' is set */
SSL_set_tlsext_host_name(con, host);
if (!TEST_int_le(SSL_connect(con), 0))
/* This shouldn't succeed because we don't have a server! */
goto end;
if (!TEST_true(get_sni_from_client_hello(wbio, &hostname)))
/* no SNI in client hello */
goto end;
if (!TEST_str_eq(hostname, host))
/* incorrect SNI value */
goto end;
ret = 1;
end:
OPENSSL_free(hostname);
SSL_free(con);
SSL_CTX_free(ctx);
return ret;
}
static int server_setup_sni(void)
{
SSL_CTX *cctx = NULL, *sctx = NULL;
SSL *clientssl = NULL, *serverssl = NULL;
int testresult = 0;
if (!TEST_true(create_ssl_ctx_pair(TLS_server_method(),
TLS_client_method(),
TLS1_VERSION, TLS_MAX_VERSION,
&sctx, &cctx, cert, privkey))
|| !TEST_true(create_ssl_objects(sctx, cctx, &serverssl, &clientssl,
NULL, NULL)))
goto end;
/* set SNI at server side */
SSL_set_tlsext_host_name(serverssl, host);
if (!TEST_true(create_ssl_connection(serverssl, clientssl, SSL_ERROR_NONE)))
goto end;
if (!TEST_ptr_null(SSL_get_servername(serverssl,
TLSEXT_NAMETYPE_host_name))) {
/* SNI should have been cleared during handshake */
goto end;
}
testresult = 1;
end:
SSL_free(serverssl);
SSL_free(clientssl);
SSL_CTX_free(sctx);
SSL_CTX_free(cctx);
return testresult;
}
typedef int (*sni_test_fn)(void);
static sni_test_fn sni_test_fns[3] = {
client_setup_sni_before_state,
client_setup_sni_after_state,
server_setup_sni
};
static int test_servername(int test)
{
/*
* For each test set up an SSL_CTX and SSL and see
* what SNI behaves.
*/
return sni_test_fns[test]();
}
int setup_tests(void)
{
if (!TEST_ptr(cert = test_get_argument(0))
|| !TEST_ptr(privkey = test_get_argument(1)))
return 0;
ADD_ALL_TESTS(test_servername, OSSL_NELEM(sni_test_fns));
return 1;
}
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