258 lines
8.3 KiB
C
258 lines
8.3 KiB
C
/*
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* Copyright 2015-2021 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <string.h>
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#include <openssl/opensslconf.h>
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#include <openssl/bio.h>
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#include <openssl/crypto.h>
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#include <openssl/evp.h>
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#include <openssl/ssl.h>
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#include <openssl/err.h>
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#include <time.h>
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#include "../ssl/packet_local.h"
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#include "testutil.h"
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#define CLIENT_VERSION_LEN 2
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#define TOTAL_NUM_TESTS 4
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/*
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* Test that explicitly setting ticket data results in it appearing in the
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* ClientHello for a negotiated SSL/TLS version
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*/
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#define TEST_SET_SESSION_TICK_DATA_VER_NEG 0
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/* Enable padding and make sure ClientHello is long enough to require it */
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#define TEST_ADD_PADDING 1
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/* Enable padding and make sure ClientHello is short enough to not need it */
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#define TEST_PADDING_NOT_NEEDED 2
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/*
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* Enable padding and add a PSK to the ClientHello (this will also ensure the
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* ClientHello is long enough to need padding)
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*/
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#define TEST_ADD_PADDING_AND_PSK 3
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#define F5_WORKAROUND_MIN_MSG_LEN 0x7f
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#define F5_WORKAROUND_MAX_MSG_LEN 0x200
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static const char *sessionfile = NULL;
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/* Dummy ALPN protocols used to pad out the size of the ClientHello */
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/* ASCII 'O' = 79 = 0x4F = EBCDIC '|'*/
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#ifdef CHARSET_EBCDIC
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static const char alpn_prots[] =
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"|1234567890123456789012345678901234567890123456789012345678901234567890123456789"
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"|1234567890123456789012345678901234567890123456789012345678901234567890123456789";
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#else
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static const char alpn_prots[] =
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"O1234567890123456789012345678901234567890123456789012345678901234567890123456789"
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"O1234567890123456789012345678901234567890123456789012345678901234567890123456789";
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#endif
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static int test_client_hello(int currtest)
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{
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SSL_CTX *ctx;
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SSL *con = NULL;
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BIO *rbio;
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BIO *wbio;
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long len;
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unsigned char *data;
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PACKET pkt = {0}, pkt2 = {0}, pkt3 = {0};
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char *dummytick = "Hello World!";
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unsigned int type = 0;
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int testresult = 0;
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size_t msglen;
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BIO *sessbio = NULL;
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SSL_SESSION *sess = NULL;
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#ifdef OPENSSL_NO_TLS1_3
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if (currtest == TEST_ADD_PADDING_AND_PSK)
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return 1;
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#endif
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/*
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* For each test set up an SSL_CTX and SSL and see what ClientHello gets
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* produced when we try to connect
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*/
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ctx = SSL_CTX_new(TLS_method());
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if (!TEST_ptr(ctx))
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goto end;
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if (!TEST_true(SSL_CTX_set_max_proto_version(ctx, TLS_MAX_VERSION)))
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goto end;
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switch(currtest) {
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case TEST_SET_SESSION_TICK_DATA_VER_NEG:
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#if !defined(OPENSSL_NO_TLS1_3) && defined(OPENSSL_NO_TLS1_2)
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/* TLSv1.3 is enabled and TLSv1.2 is disabled so can't do this test */
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return 1;
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#else
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/* Testing for session tickets <= TLS1.2; not relevant for 1.3 */
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if (!TEST_true(SSL_CTX_set_max_proto_version(ctx, TLS1_2_VERSION)))
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goto end;
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#endif
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break;
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case TEST_ADD_PADDING_AND_PSK:
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/*
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* In this case we're doing TLSv1.3 and we're sending a PSK so the
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* ClientHello is already going to be quite long. To avoid getting one
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* that is too long for this test we use a restricted ciphersuite list
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*/
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if (!TEST_false(SSL_CTX_set_cipher_list(ctx, "")))
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goto end;
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ERR_clear_error();
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/* Fall through */
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case TEST_ADD_PADDING:
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case TEST_PADDING_NOT_NEEDED:
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SSL_CTX_set_options(ctx, SSL_OP_TLSEXT_PADDING);
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/* Make sure we get a consistent size across TLS versions */
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SSL_CTX_clear_options(ctx, SSL_OP_ENABLE_MIDDLEBOX_COMPAT);
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/*
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* Add some dummy ALPN protocols so that the ClientHello is at least
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* F5_WORKAROUND_MIN_MSG_LEN bytes long - meaning padding will be
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* needed.
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*/
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if (currtest == TEST_ADD_PADDING) {
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if (!TEST_false(SSL_CTX_set_alpn_protos(ctx,
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(unsigned char *)alpn_prots,
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sizeof(alpn_prots) - 1)))
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goto end;
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/*
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* Otherwise we need to make sure we have a small enough message to
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* not need padding.
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*/
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} else if (!TEST_true(SSL_CTX_set_cipher_list(ctx,
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"AES128-SHA"))
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|| !TEST_true(SSL_CTX_set_ciphersuites(ctx,
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"TLS_AES_128_GCM_SHA256"))) {
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goto end;
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}
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break;
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default:
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goto end;
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}
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con = SSL_new(ctx);
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if (!TEST_ptr(con))
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goto end;
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if (currtest == TEST_ADD_PADDING_AND_PSK) {
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sessbio = BIO_new_file(sessionfile, "r");
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if (!TEST_ptr(sessbio)) {
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TEST_info("Unable to open session.pem");
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goto end;
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}
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sess = PEM_read_bio_SSL_SESSION(sessbio, NULL, NULL, NULL);
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if (!TEST_ptr(sess)) {
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TEST_info("Unable to load SSL_SESSION");
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goto end;
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}
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/*
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* We reset the creation time so that we don't discard the session as
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* too old.
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*/
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if (!TEST_true(SSL_SESSION_set_time(sess, (long)time(NULL)))
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|| !TEST_true(SSL_set_session(con, sess)))
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goto end;
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}
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rbio = BIO_new(BIO_s_mem());
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wbio = BIO_new(BIO_s_mem());
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if (!TEST_ptr(rbio)|| !TEST_ptr(wbio)) {
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BIO_free(rbio);
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BIO_free(wbio);
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goto end;
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}
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SSL_set_bio(con, rbio, wbio);
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SSL_set_connect_state(con);
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if (currtest == TEST_SET_SESSION_TICK_DATA_VER_NEG) {
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if (!TEST_true(SSL_set_session_ticket_ext(con, dummytick,
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strlen(dummytick))))
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goto end;
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}
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if (!TEST_int_le(SSL_connect(con), 0)) {
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/* This shouldn't succeed because we don't have a server! */
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goto end;
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}
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len = BIO_get_mem_data(wbio, (char **)&data);
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if (!TEST_true(PACKET_buf_init(&pkt, data, len))
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/* Skip the record header */
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|| !PACKET_forward(&pkt, SSL3_RT_HEADER_LENGTH))
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goto end;
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msglen = PACKET_remaining(&pkt);
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/* Skip the handshake message header */
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if (!TEST_true(PACKET_forward(&pkt, SSL3_HM_HEADER_LENGTH))
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/* Skip client version and random */
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|| !TEST_true(PACKET_forward(&pkt, CLIENT_VERSION_LEN
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+ SSL3_RANDOM_SIZE))
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/* Skip session id */
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|| !TEST_true(PACKET_get_length_prefixed_1(&pkt, &pkt2))
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/* Skip ciphers */
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|| !TEST_true(PACKET_get_length_prefixed_2(&pkt, &pkt2))
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/* Skip compression */
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|| !TEST_true(PACKET_get_length_prefixed_1(&pkt, &pkt2))
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/* Extensions len */
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|| !TEST_true(PACKET_as_length_prefixed_2(&pkt, &pkt2)))
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goto end;
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/* Loop through all extensions */
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while (PACKET_remaining(&pkt2)) {
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if (!TEST_true(PACKET_get_net_2(&pkt2, &type))
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|| !TEST_true(PACKET_get_length_prefixed_2(&pkt2, &pkt3)))
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goto end;
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if (type == TLSEXT_TYPE_session_ticket) {
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if (currtest == TEST_SET_SESSION_TICK_DATA_VER_NEG) {
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if (TEST_true(PACKET_equal(&pkt3, dummytick,
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strlen(dummytick)))) {
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/* Ticket data is as we expected */
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testresult = 1;
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}
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goto end;
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}
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}
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if (type == TLSEXT_TYPE_padding) {
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if (!TEST_false(currtest == TEST_PADDING_NOT_NEEDED))
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goto end;
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else if (TEST_true(currtest == TEST_ADD_PADDING
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|| currtest == TEST_ADD_PADDING_AND_PSK))
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testresult = TEST_true(msglen == F5_WORKAROUND_MAX_MSG_LEN);
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}
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}
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if (currtest == TEST_PADDING_NOT_NEEDED)
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testresult = 1;
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end:
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SSL_free(con);
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SSL_CTX_free(ctx);
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SSL_SESSION_free(sess);
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BIO_free(sessbio);
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return testresult;
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}
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int setup_tests(void)
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{
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if (!TEST_ptr(sessionfile = test_get_argument(0)))
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return 0;
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ADD_ALL_TESTS(test_client_hello, TOTAL_NUM_TESTS);
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return 1;
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}
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