| 1 | /*
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| 2 | * Copyright 2015-2021 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #include <string.h>
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| 11 |
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| 12 | #include <openssl/opensslconf.h>
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| 13 | #include <openssl/bio.h>
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| 14 | #include <openssl/crypto.h>
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| 15 | #include <openssl/evp.h>
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| 16 | #include <openssl/ssl.h>
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| 17 | #include <openssl/err.h>
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| 18 | #include <time.h>
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| 19 |
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| 20 | #include "internal/packet.h"
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| 21 |
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| 22 | #include "testutil.h"
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| 23 |
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| 24 | #define CLIENT_VERSION_LEN 2
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| 25 |
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| 26 | #define TOTAL_NUM_TESTS 4
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| 27 |
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| 28 | /*
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| 29 | * Test that explicitly setting ticket data results in it appearing in the
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| 30 | * ClientHello for a negotiated SSL/TLS version
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| 31 | */
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| 32 | #define TEST_SET_SESSION_TICK_DATA_VER_NEG 0
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| 33 | /* Enable padding and make sure ClientHello is long enough to require it */
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| 34 | #define TEST_ADD_PADDING 1
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| 35 | /* Enable padding and make sure ClientHello is short enough to not need it */
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| 36 | #define TEST_PADDING_NOT_NEEDED 2
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| 37 | /*
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| 38 | * Enable padding and add a PSK to the ClientHello (this will also ensure the
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| 39 | * ClientHello is long enough to need padding)
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| 40 | */
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| 41 | #define TEST_ADD_PADDING_AND_PSK 3
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| 42 |
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| 43 | #define F5_WORKAROUND_MIN_MSG_LEN 0x7f
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| 44 | #define F5_WORKAROUND_MAX_MSG_LEN 0x200
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| 45 |
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| 46 | static const char *sessionfile = NULL;
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| 47 | /* Dummy ALPN protocols used to pad out the size of the ClientHello */
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| 48 | /* ASCII 'O' = 79 = 0x4F = EBCDIC '|'*/
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| 49 | #ifdef CHARSET_EBCDIC
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| 50 | static const char alpn_prots[] =
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| 51 | "|1234567890123456789012345678901234567890123456789012345678901234567890123456789"
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| 52 | "|1234567890123456789012345678901234567890123456789012345678901234567890123456789";
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| 53 | #else
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| 54 | static const char alpn_prots[] =
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| 55 | "O1234567890123456789012345678901234567890123456789012345678901234567890123456789"
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| 56 | "O1234567890123456789012345678901234567890123456789012345678901234567890123456789";
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| 57 | #endif
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| 58 |
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| 59 | static int test_client_hello(int currtest)
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| 60 | {
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| 61 | SSL_CTX *ctx;
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| 62 | SSL *con = NULL;
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| 63 | BIO *rbio;
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| 64 | BIO *wbio;
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| 65 | long len;
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| 66 | unsigned char *data;
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| 67 | PACKET pkt, pkt2, pkt3;
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| 68 | char *dummytick = "Hello World!";
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| 69 | unsigned int type = 0;
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| 70 | int testresult = 0;
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| 71 | size_t msglen;
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| 72 | BIO *sessbio = NULL;
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| 73 | SSL_SESSION *sess = NULL;
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| 74 |
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| 75 | #ifdef OPENSSL_NO_TLS1_3
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| 76 | if (currtest == TEST_ADD_PADDING_AND_PSK)
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| 77 | return 1;
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| 78 | #endif
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| 79 |
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| 80 | memset(&pkt, 0, sizeof(pkt));
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| 81 | memset(&pkt2, 0, sizeof(pkt2));
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| 82 | memset(&pkt3, 0, sizeof(pkt3));
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| 83 |
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| 84 | /*
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| 85 | * For each test set up an SSL_CTX and SSL and see what ClientHello gets
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| 86 | * produced when we try to connect
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| 87 | */
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| 88 | ctx = SSL_CTX_new(TLS_method());
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| 89 | if (!TEST_ptr(ctx))
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| 90 | goto end;
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| 91 | if (!TEST_true(SSL_CTX_set_max_proto_version(ctx, 0)))
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| 92 | goto end;
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| 93 |
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| 94 | switch(currtest) {
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| 95 | case TEST_SET_SESSION_TICK_DATA_VER_NEG:
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| 96 | #if !defined(OPENSSL_NO_TLS1_3) && defined(OPENSSL_NO_TLS1_2)
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| 97 | /* TLSv1.3 is enabled and TLSv1.2 is disabled so can't do this test */
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| 98 | SSL_CTX_free(ctx);
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| 99 | return 1;
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| 100 | #else
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| 101 | /* Testing for session tickets <= TLS1.2; not relevant for 1.3 */
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| 102 | if (!TEST_true(SSL_CTX_set_max_proto_version(ctx, TLS1_2_VERSION)))
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| 103 | goto end;
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| 104 | #endif
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| 105 | break;
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| 106 |
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| 107 | case TEST_ADD_PADDING_AND_PSK:
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| 108 | /*
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| 109 | * In this case we're doing TLSv1.3 and we're sending a PSK so the
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| 110 | * ClientHello is already going to be quite long. To avoid getting one
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| 111 | * that is too long for this test we use a restricted ciphersuite list
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| 112 | */
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| 113 | if (!TEST_false(SSL_CTX_set_cipher_list(ctx, "")))
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| 114 | goto end;
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| 115 | ERR_clear_error();
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| 116 | /* Fall through */
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| 117 | case TEST_ADD_PADDING:
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| 118 | case TEST_PADDING_NOT_NEEDED:
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| 119 | SSL_CTX_set_options(ctx, SSL_OP_TLSEXT_PADDING);
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| 120 | /* Make sure we get a consistent size across TLS versions */
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| 121 | SSL_CTX_clear_options(ctx, SSL_OP_ENABLE_MIDDLEBOX_COMPAT);
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| 122 | /*
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| 123 | * Add some dummy ALPN protocols so that the ClientHello is at least
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| 124 | * F5_WORKAROUND_MIN_MSG_LEN bytes long - meaning padding will be
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| 125 | * needed.
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| 126 | */
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| 127 | if (currtest == TEST_ADD_PADDING) {
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| 128 | if (!TEST_false(SSL_CTX_set_alpn_protos(ctx,
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| 129 | (unsigned char *)alpn_prots,
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| 130 | sizeof(alpn_prots) - 1)))
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| 131 | goto end;
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| 132 | /*
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| 133 | * Otherwise we need to make sure we have a small enough message to
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| 134 | * not need padding.
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| 135 | */
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| 136 | } else if (!TEST_true(SSL_CTX_set_cipher_list(ctx,
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| 137 | "AES128-SHA"))
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| 138 | || !TEST_true(SSL_CTX_set_ciphersuites(ctx,
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| 139 | "TLS_AES_128_GCM_SHA256"))) {
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| 140 | goto end;
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| 141 | }
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| 142 | break;
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| 143 |
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| 144 | default:
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| 145 | goto end;
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| 146 | }
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| 147 |
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| 148 | con = SSL_new(ctx);
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| 149 | if (!TEST_ptr(con))
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| 150 | goto end;
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| 151 |
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| 152 | if (currtest == TEST_ADD_PADDING_AND_PSK) {
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| 153 | sessbio = BIO_new_file(sessionfile, "r");
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| 154 | if (!TEST_ptr(sessbio)) {
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| 155 | TEST_info("Unable to open session.pem");
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| 156 | goto end;
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| 157 | }
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| 158 | sess = PEM_read_bio_SSL_SESSION(sessbio, NULL, NULL, NULL);
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| 159 | if (!TEST_ptr(sess)) {
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| 160 | TEST_info("Unable to load SSL_SESSION");
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| 161 | goto end;
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| 162 | }
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| 163 | /*
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| 164 | * We reset the creation time so that we don't discard the session as
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| 165 | * too old.
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| 166 | */
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| 167 | if (!TEST_true(SSL_SESSION_set_time(sess, (long)time(NULL)))
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| 168 | || !TEST_true(SSL_set_session(con, sess)))
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| 169 | goto end;
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| 170 | }
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| 171 |
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| 172 | rbio = BIO_new(BIO_s_mem());
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| 173 | wbio = BIO_new(BIO_s_mem());
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| 174 | if (!TEST_ptr(rbio)|| !TEST_ptr(wbio)) {
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| 175 | BIO_free(rbio);
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| 176 | BIO_free(wbio);
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| 177 | goto end;
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| 178 | }
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| 179 |
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| 180 | SSL_set_bio(con, rbio, wbio);
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| 181 | SSL_set_connect_state(con);
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| 182 |
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| 183 | if (currtest == TEST_SET_SESSION_TICK_DATA_VER_NEG) {
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| 184 | if (!TEST_true(SSL_set_session_ticket_ext(con, dummytick,
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| 185 | strlen(dummytick))))
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| 186 | goto end;
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| 187 | }
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| 188 |
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| 189 | if (!TEST_int_le(SSL_connect(con), 0)) {
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| 190 | /* This shouldn't succeed because we don't have a server! */
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| 191 | goto end;
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| 192 | }
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| 193 |
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| 194 | if (!TEST_long_ge(len = BIO_get_mem_data(wbio, (char **)&data), 0)
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| 195 | || !TEST_true(PACKET_buf_init(&pkt, data, len))
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| 196 | /* Skip the record header */
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| 197 | || !PACKET_forward(&pkt, SSL3_RT_HEADER_LENGTH))
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| 198 | goto end;
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| 199 |
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| 200 | msglen = PACKET_remaining(&pkt);
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| 201 |
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| 202 | /* Skip the handshake message header */
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| 203 | if (!TEST_true(PACKET_forward(&pkt, SSL3_HM_HEADER_LENGTH))
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| 204 | /* Skip client version and random */
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| 205 | || !TEST_true(PACKET_forward(&pkt, CLIENT_VERSION_LEN
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| 206 | + SSL3_RANDOM_SIZE))
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| 207 | /* Skip session id */
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| 208 | || !TEST_true(PACKET_get_length_prefixed_1(&pkt, &pkt2))
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| 209 | /* Skip ciphers */
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| 210 | || !TEST_true(PACKET_get_length_prefixed_2(&pkt, &pkt2))
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| 211 | /* Skip compression */
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| 212 | || !TEST_true(PACKET_get_length_prefixed_1(&pkt, &pkt2))
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| 213 | /* Extensions len */
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| 214 | || !TEST_true(PACKET_as_length_prefixed_2(&pkt, &pkt2)))
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| 215 | goto end;
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| 216 |
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| 217 | /* Loop through all extensions */
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| 218 | while (PACKET_remaining(&pkt2)) {
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| 219 |
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| 220 | if (!TEST_true(PACKET_get_net_2(&pkt2, &type))
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| 221 | || !TEST_true(PACKET_get_length_prefixed_2(&pkt2, &pkt3)))
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| 222 | goto end;
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| 223 |
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| 224 | if (type == TLSEXT_TYPE_session_ticket) {
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| 225 | if (currtest == TEST_SET_SESSION_TICK_DATA_VER_NEG) {
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| 226 | if (TEST_true(PACKET_equal(&pkt3, dummytick,
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| 227 | strlen(dummytick)))) {
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| 228 | /* Ticket data is as we expected */
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| 229 | testresult = 1;
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| 230 | }
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| 231 | goto end;
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| 232 | }
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| 233 | }
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| 234 | if (type == TLSEXT_TYPE_padding) {
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| 235 | if (!TEST_false(currtest == TEST_PADDING_NOT_NEEDED))
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| 236 | goto end;
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| 237 | else if (TEST_true(currtest == TEST_ADD_PADDING
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| 238 | || currtest == TEST_ADD_PADDING_AND_PSK))
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| 239 | testresult = TEST_true(msglen == F5_WORKAROUND_MAX_MSG_LEN);
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| 240 | }
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| 241 | }
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| 242 |
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| 243 | if (currtest == TEST_PADDING_NOT_NEEDED)
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| 244 | testresult = 1;
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| 245 |
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| 246 | end:
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| 247 | SSL_free(con);
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| 248 | SSL_CTX_free(ctx);
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| 249 | SSL_SESSION_free(sess);
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| 250 | BIO_free(sessbio);
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| 251 |
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| 252 | return testresult;
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| 253 | }
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| 254 |
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| 255 | OPT_TEST_DECLARE_USAGE("sessionfile\n")
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| 256 |
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| 257 | int setup_tests(void)
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| 258 | {
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| 259 | if (!test_skip_common_options()) {
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| 260 | TEST_error("Error parsing test options\n");
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| 261 | return 0;
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| 262 | }
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| 263 |
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| 264 | if (!TEST_ptr(sessionfile = test_get_argument(0)))
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| 265 | return 0;
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| 266 |
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| 267 | ADD_ALL_TESTS(test_client_hello, TOTAL_NUM_TESTS);
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| 268 | return 1;
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| 269 | }
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