2 * Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL licenses, (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 * https://www.openssl.org/source/license.html
8 * or in the file LICENSE in the source distribution.
12 #include <openssl/ssl.h>
13 #include <openssl/bio.h>
14 #include <openssl/err.h>
16 #include "../ssl/packet_locl.h"
18 #include "ssltestlib.h"
20 /* Should we fragment records or not? 0 = no, !0 = yes*/
21 static int fragment = 0;
23 static int async_new(BIO *bi);
24 static int async_free(BIO *a);
25 static int async_read(BIO *b, char *out, int outl);
26 static int async_write(BIO *b, const char *in, int inl);
27 static long async_ctrl(BIO *b, int cmd, long num, void *ptr);
28 static int async_gets(BIO *bp, char *buf, int size);
29 static int async_puts(BIO *bp, const char *str);
31 /* Choose a sufficiently large type likely to be unused for this custom BIO */
32 # define BIO_TYPE_ASYNC_FILTER (0x80 | BIO_TYPE_FILTER)
34 static BIO_METHOD *methods_async = NULL;
41 static const BIO_METHOD *bio_f_async_filter()
43 if (methods_async == NULL) {
44 methods_async = BIO_meth_new(BIO_TYPE_ASYNC_FILTER, "Async filter");
45 if ( methods_async == NULL
46 || !BIO_meth_set_write(methods_async, async_write)
47 || !BIO_meth_set_read(methods_async, async_read)
48 || !BIO_meth_set_puts(methods_async, async_puts)
49 || !BIO_meth_set_gets(methods_async, async_gets)
50 || !BIO_meth_set_ctrl(methods_async, async_ctrl)
51 || !BIO_meth_set_create(methods_async, async_new)
52 || !BIO_meth_set_destroy(methods_async, async_free))
58 static int async_new(BIO *bio)
60 struct async_ctrs *ctrs;
62 ctrs = OPENSSL_zalloc(sizeof(struct async_ctrs));
66 BIO_set_data(bio, ctrs);
71 static int async_free(BIO *bio)
73 struct async_ctrs *ctrs;
77 ctrs = BIO_get_data(bio);
79 BIO_set_data(bio, NULL);
85 static int async_read(BIO *bio, char *out, int outl)
87 struct async_ctrs *ctrs;
89 BIO *next = BIO_next(bio);
96 ctrs = BIO_get_data(bio);
98 BIO_clear_retry_flags(bio);
100 if (ctrs->rctr > 0) {
101 ret = BIO_read(next, out, 1);
102 if (ret <= 0 && BIO_should_read(next))
103 BIO_set_retry_read(bio);
107 BIO_set_retry_read(bio);
113 #define MIN_RECORD_LEN 6
115 #define CONTENTTYPEPOS 0
116 #define VERSIONHIPOS 1
117 #define VERSIONLOPOS 2
120 static int async_write(BIO *bio, const char *in, int inl)
122 struct async_ctrs *ctrs;
125 BIO *next = BIO_next(bio);
132 ctrs = BIO_get_data(bio);
134 BIO_clear_retry_flags(bio);
136 if (ctrs->wctr > 0) {
141 if (!PACKET_buf_init(&pkt, (const unsigned char *)in, inl))
144 while (PACKET_remaining(&pkt) > 0) {
145 PACKET payload, wholebody;
146 unsigned int contenttype, versionhi, versionlo, data;
147 unsigned int msgtype = 0, negversion = 0;
149 if ( !PACKET_get_1(&pkt, &contenttype)
150 || !PACKET_get_1(&pkt, &versionhi)
151 || !PACKET_get_1(&pkt, &versionlo)
152 || !PACKET_get_length_prefixed_2(&pkt, &payload))
155 /* Pretend we wrote out the record header */
156 written += SSL3_RT_HEADER_LENGTH;
159 if (contenttype == SSL3_RT_HANDSHAKE
160 && !PACKET_get_1(&wholebody, &msgtype))
163 if (msgtype == SSL3_MT_SERVER_HELLO
164 && (!PACKET_forward(&wholebody,
165 SSL3_HM_HEADER_LENGTH - 1)
166 || !PACKET_get_net_2(&wholebody, &negversion)))
169 while (PACKET_get_1(&payload, &data)) {
170 /* Create a new one byte long record for each byte in the
171 * record in the input buffer
173 char smallrec[MIN_RECORD_LEN] = {
174 0, /* Content type */
182 smallrec[CONTENTTYPEPOS] = contenttype;
183 smallrec[VERSIONHIPOS] = versionhi;
184 smallrec[VERSIONLOPOS] = versionlo;
185 smallrec[DATAPOS] = data;
186 ret = BIO_write(next, smallrec, MIN_RECORD_LEN);
192 * We can't fragment anything after the ServerHello (or CCS <=
193 * TLS1.2), otherwise we get a bad record MAC
194 * TODO(TLS1.3): Change TLS1_3_VERSION_DRAFT to TLS1_3_VERSION
197 if (contenttype == SSL3_RT_CHANGE_CIPHER_SPEC
198 || (negversion == TLS1_3_VERSION_DRAFT
199 && msgtype == SSL3_MT_SERVER_HELLO)) {
205 /* Write any data we have left after fragmenting */
207 if ((int)written < inl) {
208 ret = BIO_write(next, in + written , inl - written);
211 if (ret <= 0 && BIO_should_write(next))
212 BIO_set_retry_write(bio);
217 BIO_set_retry_write(bio);
223 static long async_ctrl(BIO *bio, int cmd, long num, void *ptr)
226 BIO *next = BIO_next(bio);
236 ret = BIO_ctrl(next, cmd, num, ptr);
242 static int async_gets(BIO *bio, char *buf, int size)
244 /* We don't support this - not needed anyway */
248 static int async_puts(BIO *bio, const char *str)
250 return async_write(bio, str, strlen(str));
253 #define MAX_ATTEMPTS 100
255 int main(int argc, char *argv[])
257 SSL_CTX *serverctx = NULL, *clientctx = NULL;
258 SSL *serverssl = NULL, *clientssl = NULL;
259 BIO *s_to_c_fbio = NULL, *c_to_s_fbio = NULL;
260 int test, err = 1, ret;
262 const char testdata[] = "Test data";
263 char buf[sizeof(testdata)];
265 CRYPTO_set_mem_debug(1);
266 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);
269 printf("Invalid argument count\n");
273 if (!create_ssl_ctx_pair(TLS_server_method(), TLS_client_method(),
274 &serverctx, &clientctx, argv[1], argv[2])) {
275 printf("Failed to create SSL_CTX pair\n");
280 * We do 2 test runs. The first time around we just do a normal handshake
281 * with lots of async io going on. The second time around we also break up
282 * all records so that the content is only one byte length (up until the
285 for (test = 1; test < 3; test++) {
290 s_to_c_fbio = BIO_new(bio_f_async_filter());
291 c_to_s_fbio = BIO_new(bio_f_async_filter());
292 if (s_to_c_fbio == NULL || c_to_s_fbio == NULL) {
293 printf("Failed to create filter BIOs\n");
294 BIO_free(s_to_c_fbio);
295 BIO_free(c_to_s_fbio);
299 /* BIOs get freed on error */
300 if (!create_ssl_objects(serverctx, clientctx, &serverssl, &clientssl,
301 s_to_c_fbio, c_to_s_fbio)) {
302 printf("Test %d failed: Create SSL objects failed\n", test);
306 if (!create_ssl_connection(serverssl, clientssl)) {
307 printf("Test %d failed: Create SSL connection failed\n", test);
312 * Send and receive some test data. Do the whole thing twice to ensure
313 * we hit at least one async event in both reading and writing
315 for (j = 0; j < 2; j++) {
319 * Write some test data. It should never take more than 2 attempts
320 * (the first one might be a retryable fail).
322 for (ret = -1, i = 0, len = 0; len != sizeof(testdata) && i < 2;
324 ret = SSL_write(clientssl, testdata + len,
325 sizeof(testdata) - len);
329 int ssl_error = SSL_get_error(clientssl, ret);
331 if (ssl_error == SSL_ERROR_SYSCALL ||
332 ssl_error == SSL_ERROR_SSL) {
333 printf("Test %d failed: Failed to write app data\n", test);
339 if (len != sizeof(testdata)) {
341 printf("Test %d failed: Failed to write all app data\n", test);
345 * Now read the test data. It may take more attemps here because
346 * it could fail once for each byte read, including all overhead
347 * bytes from the record header/padding etc.
349 for (ret = -1, i = 0, len = 0; len != sizeof(testdata) &&
350 i < MAX_ATTEMPTS; i++)
352 ret = SSL_read(serverssl, buf + len, sizeof(buf) - len);
356 int ssl_error = SSL_get_error(serverssl, ret);
358 if (ssl_error == SSL_ERROR_SYSCALL ||
359 ssl_error == SSL_ERROR_SSL) {
360 printf("Test %d failed: Failed to read app data\n", test);
366 if (len != sizeof(testdata)
367 || memcmp(buf, testdata, sizeof(testdata)) != 0) {
369 printf("Test %d failed: Unexpected app data received\n", test);
374 /* Also frees the BIOs */
377 clientssl = serverssl = NULL;
380 printf("Test success\n");
385 ERR_print_errors_fp(stderr);
389 SSL_CTX_free(clientctx);
390 SSL_CTX_free(serverctx);
392 # ifndef OPENSSL_NO_CRYPTO_MDEBUG
393 CRYPTO_mem_leaks_fp(stderr);