/* * Copyright 2015-2025 The OpenSSL Project Authors. All Rights Reserved. * * Licensed under the Apache License 2.0 (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 #include #include #include #include #include #include #include #include "internal/packet.h" #include "testutil.h" #define CLIENT_VERSION_LEN 2 #define TOTAL_NUM_TESTS 3 /* * Test that explicitly setting ticket data results in it appearing in the * ClientHello for a negotiated SSL/TLS version */ #define TEST_SET_SESSION_TICK_DATA_VER_NEG 0 /* Enable padding and make sure ClientHello is long enough to require it */ #define TEST_ADD_PADDING 1 /* Enable padding and make sure ClientHello is short enough to not need it */ #define TEST_PADDING_NOT_NEEDED 2 #define F5_WORKAROUND_MIN_MSG_LEN 0x7f #define F5_WORKAROUND_MAX_MSG_LEN 0x200 /* Dummy ALPN protocols used to pad out the size of the ClientHello */ /* ASCII 'O' = 79 = 0x4F = EBCDIC '|'*/ #ifdef CHARSET_EBCDIC static const char alpn_prots[] = "|1234567890123456789012345678901234567890123456789012345678901234567890123456789" "|1234567890123456789012345678901234567890123456789012345678901234567890123456789"; #else static const char alpn_prots[] = "O1234567890123456789012345678901234567890123456789012345678901234567890123456789" "O1234567890123456789012345678901234567890123456789012345678901234567890123456789"; #endif static int test_client_hello(int currtest) { SSL_CTX *ctx; SSL *con = NULL; BIO *rbio; BIO *wbio; long len; unsigned char *data; PACKET pkt, pkt2, pkt3; char *dummytick = "Hello World!"; unsigned int type = 0; int testresult = 0; size_t msglen; BIO *sessbio = NULL; SSL_SESSION *sess = NULL; memset(&pkt, 0, sizeof(pkt)); memset(&pkt2, 0, sizeof(pkt2)); memset(&pkt3, 0, sizeof(pkt3)); /* * For each test set up an SSL_CTX and SSL and see what ClientHello gets * produced when we try to connect */ ctx = SSL_CTX_new(TLS_method()); if (!TEST_ptr(ctx)) goto end; if (!TEST_true(SSL_CTX_set_max_proto_version(ctx, 0))) goto end; switch (currtest) { case TEST_SET_SESSION_TICK_DATA_VER_NEG: #if !defined(OPENSSL_NO_TLS1_3) && defined(OPENSSL_NO_TLS1_2) /* TLSv1.3 is enabled and TLSv1.2 is disabled so can't do this test */ SSL_CTX_free(ctx); return 1; #else /* Testing for session tickets <= TLS1.2; not relevant for 1.3 */ if (!TEST_true(SSL_CTX_set_max_proto_version(ctx, TLS1_2_VERSION))) goto end; #endif break; case TEST_ADD_PADDING: case TEST_PADDING_NOT_NEEDED: SSL_CTX_set_options(ctx, SSL_OP_TLSEXT_PADDING); /* Make sure we get a consistent size across TLS versions */ SSL_CTX_clear_options(ctx, SSL_OP_ENABLE_MIDDLEBOX_COMPAT); /* Avoid large keyshares */ if (!TEST_true(SSL_CTX_set1_groups_list(ctx, "?X25519:?secp256r1:?ffdhe2048:?ffdhe3072"))) goto end; /* * Add some dummy ALPN protocols so that the ClientHello is at least * F5_WORKAROUND_MIN_MSG_LEN bytes long - meaning padding will be * needed. */ if (currtest == TEST_ADD_PADDING) { if (!TEST_false(SSL_CTX_set_alpn_protos(ctx, (unsigned char *)alpn_prots, sizeof(alpn_prots) - 1))) goto end; /* * Otherwise we need to make sure we have a small enough message to * not need padding. */ } else if (!TEST_true(SSL_CTX_set_cipher_list(ctx, "AES128-SHA")) || !TEST_true(SSL_CTX_set_ciphersuites(ctx, "TLS_AES_128_GCM_SHA256"))) { goto end; } break; default: 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); if (currtest == TEST_SET_SESSION_TICK_DATA_VER_NEG) { if (!TEST_true(SSL_set_session_ticket_ext(con, dummytick, strlen(dummytick)))) goto end; } if (!TEST_int_le(SSL_connect(con), 0)) { /* This shouldn't succeed because we don't have a server! */ goto end; } if (!TEST_long_ge(len = BIO_get_mem_data(wbio, (char **)&data), 0) || !TEST_true(PACKET_buf_init(&pkt, data, len)) /* Skip the record header */ || !PACKET_forward(&pkt, SSL3_RT_HEADER_LENGTH)) goto end; msglen = PACKET_remaining(&pkt); /* Skip the handshake message header */ if (!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 */ 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_session_ticket) { if (currtest == TEST_SET_SESSION_TICK_DATA_VER_NEG) { if (TEST_true(PACKET_equal(&pkt3, dummytick, strlen(dummytick)))) { /* Ticket data is as we expected */ testresult = 1; } goto end; } } if (type == TLSEXT_TYPE_padding) { if (!TEST_false(currtest == TEST_PADDING_NOT_NEEDED)) goto end; else if (TEST_true(currtest == TEST_ADD_PADDING)) testresult = TEST_true(msglen == F5_WORKAROUND_MAX_MSG_LEN); } } if (currtest == TEST_PADDING_NOT_NEEDED) testresult = 1; end: SSL_free(con); SSL_CTX_free(ctx); SSL_SESSION_free(sess); BIO_free(sessbio); return testresult; } int setup_tests(void) { if (!test_skip_common_options()) { TEST_error("Error parsing test options\n"); return 0; } ADD_ALL_TESTS(test_client_hello, TOTAL_NUM_TESTS); return 1; }