2 * Copyright 2016-2020 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
11 #include <openssl/buffer.h>
12 #include <openssl/rand.h>
13 #include "internal/packet.h"
16 static const unsigned char simple1[] = { 0xff };
17 static const unsigned char simple2[] = { 0x01, 0xff };
18 static const unsigned char simple3[] = { 0x00, 0x00, 0x00, 0x01, 0xff };
19 static const unsigned char nestedsub[] = { 0x03, 0xff, 0x01, 0xff };
20 static const unsigned char seqsub[] = { 0x01, 0xff, 0x01, 0xff };
21 static const unsigned char empty[] = { 0x00 };
22 static const unsigned char alloc[] = { 0x02, 0xfe, 0xff };
23 static const unsigned char submem[] = { 0x03, 0x02, 0xfe, 0xff };
24 static const unsigned char fixed[] = { 0xff, 0xff, 0xff };
25 static const unsigned char simpleder[] = {
26 0xfc, 0x04, 0x00, 0x01, 0x02, 0x03, 0xff, 0xfe, 0xfd
31 static int cleanup(WPACKET *pkt)
37 static int test_WPACKET_init(void)
42 unsigned char sbuf[3];
44 if (!TEST_true(WPACKET_init(&pkt, buf))
45 || !TEST_true(WPACKET_put_bytes_u8(&pkt, 0xff))
46 /* Closing a top level WPACKET should fail */
47 || !TEST_false(WPACKET_close(&pkt))
48 /* Finishing a top level WPACKET should succeed */
49 || !TEST_true(WPACKET_finish(&pkt))
51 * Can't call close or finish on a WPACKET that's already
54 || !TEST_false(WPACKET_close(&pkt))
55 || !TEST_false(WPACKET_finish(&pkt))
56 || !TEST_true(WPACKET_get_total_written(&pkt, &written))
57 || !TEST_mem_eq(buf->data, written, simple1, sizeof(simple1)))
60 /* Now try with a one byte length prefix */
61 if (!TEST_true(WPACKET_init_len(&pkt, buf, 1))
62 || !TEST_true(WPACKET_put_bytes_u8(&pkt, 0xff))
63 || !TEST_true(WPACKET_finish(&pkt))
64 || !TEST_true(WPACKET_get_total_written(&pkt, &written))
65 || !TEST_mem_eq(buf->data, written, simple2, sizeof(simple2)))
68 /* And a longer length prefix */
69 if (!TEST_true(WPACKET_init_len(&pkt, buf, 4))
70 || !TEST_true(WPACKET_put_bytes_u8(&pkt, 0xff))
71 || !TEST_true(WPACKET_finish(&pkt))
72 || !TEST_true(WPACKET_get_total_written(&pkt, &written))
73 || !TEST_mem_eq(buf->data, written, simple3, sizeof(simple3)))
76 if (!TEST_true(WPACKET_init_len(&pkt, buf, 1)))
78 for (i = 1; i < 257; i++) {
80 * Putting more bytes in than fit for the size of the length prefix
83 if (!TEST_int_eq(WPACKET_put_bytes_u8(&pkt, 0xff), i < 256))
86 if (!TEST_true(WPACKET_finish(&pkt)))
89 /* Test initialising from a fixed size buffer */
90 if (!TEST_true(WPACKET_init_static_len(&pkt, sbuf, sizeof(sbuf), 0))
91 /* Adding 3 bytes should succeed */
92 || !TEST_true(WPACKET_put_bytes_u24(&pkt, 0xffffff))
93 /* Adding 1 more byte should fail */
94 || !TEST_false(WPACKET_put_bytes_u8(&pkt, 0xff))
95 /* Finishing the top level WPACKET should succeed */
96 || !TEST_true(WPACKET_finish(&pkt))
97 || !TEST_true(WPACKET_get_total_written(&pkt, &written))
98 || !TEST_mem_eq(sbuf, written, fixed, sizeof(sbuf))
99 /* Initialise with 1 len byte */
100 || !TEST_true(WPACKET_init_static_len(&pkt, sbuf, sizeof(sbuf), 1))
101 /* Adding 2 bytes should succeed */
102 || !TEST_true(WPACKET_put_bytes_u16(&pkt, 0xfeff))
103 /* Adding 1 more byte should fail */
104 || !TEST_false(WPACKET_put_bytes_u8(&pkt, 0xff))
105 || !TEST_true(WPACKET_finish(&pkt))
106 || !TEST_true(WPACKET_get_total_written(&pkt, &written))
107 || !TEST_mem_eq(sbuf, written, alloc, sizeof(alloc)))
108 return cleanup(&pkt);
113 static int test_WPACKET_set_max_size(void)
118 if (!TEST_true(WPACKET_init(&pkt, buf))
120 * No previous lenbytes set so we should be ok to set the max
123 || !TEST_true(WPACKET_set_max_size(&pkt, SIZE_MAX))
124 /* We should be able to set it smaller too */
125 || !TEST_true(WPACKET_set_max_size(&pkt, SIZE_MAX -1))
126 /* And setting it bigger again should be ok */
127 || !TEST_true(WPACKET_set_max_size(&pkt, SIZE_MAX))
128 || !TEST_true(WPACKET_finish(&pkt)))
129 return cleanup(&pkt);
131 if (!TEST_true(WPACKET_init_len(&pkt, buf, 1))
133 * Should fail because we already consumed 1 byte with the
136 || !TEST_false(WPACKET_set_max_size(&pkt, 0))
138 * Max size can't be bigger than biggest that will fit in
141 || !TEST_false(WPACKET_set_max_size(&pkt, 0x0101))
142 /* It can be the same as the maximum possible size */
143 || !TEST_true(WPACKET_set_max_size(&pkt, 0x0100))
144 /* Or it can be less */
145 || !TEST_true(WPACKET_set_max_size(&pkt, 0x01))
146 /* Should fail because packet is already filled */
147 || !TEST_false(WPACKET_put_bytes_u8(&pkt, 0xff))
148 /* You can't put in more bytes than max size */
149 || !TEST_true(WPACKET_set_max_size(&pkt, 0x02))
150 || !TEST_true(WPACKET_put_bytes_u8(&pkt, 0xff))
151 || !TEST_false(WPACKET_put_bytes_u8(&pkt, 0xff))
152 || !TEST_true(WPACKET_finish(&pkt))
153 || !TEST_true(WPACKET_get_total_written(&pkt, &written))
154 || !TEST_mem_eq(buf->data, written, simple2, sizeof(simple2)))
155 return cleanup(&pkt);
160 static int test_WPACKET_start_sub_packet(void)
166 if (!TEST_true(WPACKET_init(&pkt, buf))
167 || !TEST_true(WPACKET_start_sub_packet(&pkt))
168 || !TEST_true(WPACKET_put_bytes_u8(&pkt, 0xff))
169 /* Can't finish because we have a sub packet */
170 || !TEST_false(WPACKET_finish(&pkt))
171 || !TEST_true(WPACKET_close(&pkt))
172 /* Sub packet is closed so can't close again */
173 || !TEST_false(WPACKET_close(&pkt))
174 /* Now a top level so finish should succeed */
175 || !TEST_true(WPACKET_finish(&pkt))
176 || !TEST_true(WPACKET_get_total_written(&pkt, &written))
177 || !TEST_mem_eq(buf->data, written, simple1, sizeof(simple1)))
178 return cleanup(&pkt);
180 /* Single sub-packet with length prefix */
181 if (!TEST_true(WPACKET_init(&pkt, buf))
182 || !TEST_true(WPACKET_start_sub_packet_u8(&pkt))
183 || !TEST_true(WPACKET_put_bytes_u8(&pkt, 0xff))
184 || !TEST_true(WPACKET_close(&pkt))
185 || !TEST_true(WPACKET_finish(&pkt))
186 || !TEST_true(WPACKET_get_total_written(&pkt, &written))
187 || !TEST_mem_eq(buf->data, written, simple2, sizeof(simple2)))
188 return cleanup(&pkt);
190 /* Nested sub-packets with length prefixes */
191 if (!TEST_true(WPACKET_init(&pkt, buf))
192 || !TEST_true(WPACKET_start_sub_packet_u8(&pkt))
193 || !TEST_true(WPACKET_put_bytes_u8(&pkt, 0xff))
194 || !TEST_true(WPACKET_start_sub_packet_u8(&pkt))
195 || !TEST_true(WPACKET_put_bytes_u8(&pkt, 0xff))
196 || !TEST_true(WPACKET_get_length(&pkt, &len))
197 || !TEST_size_t_eq(len, 1)
198 || !TEST_true(WPACKET_close(&pkt))
199 || !TEST_true(WPACKET_get_length(&pkt, &len))
200 || !TEST_size_t_eq(len, 3)
201 || !TEST_true(WPACKET_close(&pkt))
202 || !TEST_true(WPACKET_finish(&pkt))
203 || !TEST_true(WPACKET_get_total_written(&pkt, &written))
204 || !TEST_mem_eq(buf->data, written, nestedsub, sizeof(nestedsub)))
205 return cleanup(&pkt);
207 /* Sequential sub-packets with length prefixes */
208 if (!TEST_true(WPACKET_init(&pkt, buf))
209 || !TEST_true(WPACKET_start_sub_packet_u8(&pkt))
210 || !TEST_true(WPACKET_put_bytes_u8(&pkt, 0xff))
211 || !TEST_true(WPACKET_close(&pkt))
212 || !TEST_true(WPACKET_start_sub_packet_u8(&pkt))
213 || !TEST_true(WPACKET_put_bytes_u8(&pkt, 0xff))
214 || !TEST_true(WPACKET_close(&pkt))
215 || !TEST_true(WPACKET_finish(&pkt))
216 || !TEST_true(WPACKET_get_total_written(&pkt, &written))
217 || !TEST_mem_eq(buf->data, written, seqsub, sizeof(seqsub)))
218 return cleanup(&pkt);
220 /* Nested sub-packets with lengths filled before finish */
221 if (!TEST_true(WPACKET_init(&pkt, buf))
222 || !TEST_true(WPACKET_start_sub_packet_u8(&pkt))
223 || !TEST_true(WPACKET_put_bytes_u8(&pkt, 0xff))
224 || !TEST_true(WPACKET_start_sub_packet_u8(&pkt))
225 || !TEST_true(WPACKET_put_bytes_u8(&pkt, 0xff))
226 || !TEST_true(WPACKET_get_length(&pkt, &len))
227 || !TEST_size_t_eq(len, 1)
228 || !TEST_true(WPACKET_close(&pkt))
229 || !TEST_true(WPACKET_get_length(&pkt, &len))
230 || !TEST_size_t_eq(len, 3)
231 || !TEST_true(WPACKET_close(&pkt))
232 || !TEST_true(WPACKET_fill_lengths(&pkt))
233 || !TEST_true(WPACKET_get_total_written(&pkt, &written))
234 || !TEST_mem_eq(buf->data, written, nestedsub, sizeof(nestedsub))
235 || !TEST_true(WPACKET_finish(&pkt)))
236 return cleanup(&pkt);
242 static int test_WPACKET_set_flags(void)
247 /* Set packet to be non-zero length */
248 if (!TEST_true(WPACKET_init(&pkt, buf))
249 || !TEST_true(WPACKET_set_flags(&pkt, WPACKET_FLAGS_NON_ZERO_LENGTH))
250 /* Should fail because of zero length */
251 || !TEST_false(WPACKET_finish(&pkt))
252 || !TEST_true(WPACKET_put_bytes_u8(&pkt, 0xff))
253 || !TEST_true(WPACKET_finish(&pkt))
254 || !TEST_true(WPACKET_get_total_written(&pkt, &written))
255 || !TEST_mem_eq(buf->data, written, simple1, sizeof(simple1)))
256 return cleanup(&pkt);
258 /* Repeat above test in a sub-packet */
259 if (!TEST_true(WPACKET_init(&pkt, buf))
260 || !TEST_true(WPACKET_start_sub_packet(&pkt))
261 || !TEST_true(WPACKET_set_flags(&pkt, WPACKET_FLAGS_NON_ZERO_LENGTH))
262 /* Should fail because of zero length */
263 || !TEST_false(WPACKET_close(&pkt))
264 || !TEST_true(WPACKET_put_bytes_u8(&pkt, 0xff))
265 || !TEST_true(WPACKET_close(&pkt))
266 || !TEST_true(WPACKET_finish(&pkt))
267 || !TEST_true(WPACKET_get_total_written(&pkt, &written))
268 || !TEST_mem_eq(buf->data, written, simple1, sizeof(simple1)))
269 return cleanup(&pkt);
271 /* Set packet to abandon non-zero length */
272 if (!TEST_true(WPACKET_init_len(&pkt, buf, 1))
273 || !TEST_true(WPACKET_set_flags(&pkt, WPACKET_FLAGS_ABANDON_ON_ZERO_LENGTH))
274 || !TEST_true(WPACKET_finish(&pkt))
275 || !TEST_true(WPACKET_get_total_written(&pkt, &written))
276 || !TEST_size_t_eq(written, 0))
277 return cleanup(&pkt);
279 /* Repeat above test but only abandon a sub-packet */
280 if (!TEST_true(WPACKET_init_len(&pkt, buf, 1))
281 || !TEST_true(WPACKET_start_sub_packet_u8(&pkt))
282 || !TEST_true(WPACKET_set_flags(&pkt, WPACKET_FLAGS_ABANDON_ON_ZERO_LENGTH))
283 || !TEST_true(WPACKET_close(&pkt))
284 || !TEST_true(WPACKET_finish(&pkt))
285 || !TEST_true(WPACKET_get_total_written(&pkt, &written))
286 || !TEST_mem_eq(buf->data, written, empty, sizeof(empty)))
287 return cleanup(&pkt);
289 /* And repeat with a non empty sub-packet */
290 if (!TEST_true(WPACKET_init(&pkt, buf))
291 || !TEST_true(WPACKET_start_sub_packet_u8(&pkt))
292 || !TEST_true(WPACKET_set_flags(&pkt, WPACKET_FLAGS_ABANDON_ON_ZERO_LENGTH))
293 || !TEST_true(WPACKET_put_bytes_u8(&pkt, 0xff))
294 || !TEST_true(WPACKET_close(&pkt))
295 || !TEST_true(WPACKET_finish(&pkt))
296 || !TEST_true(WPACKET_get_total_written(&pkt, &written))
297 || !TEST_mem_eq(buf->data, written, simple2, sizeof(simple2)))
298 return cleanup(&pkt);
302 static int test_WPACKET_allocate_bytes(void)
306 unsigned char *bytes;
308 if (!TEST_true(WPACKET_init_len(&pkt, buf, 1))
309 || !TEST_true(WPACKET_allocate_bytes(&pkt, 2, &bytes)))
310 return cleanup(&pkt);
313 if (!TEST_true(WPACKET_finish(&pkt))
314 || !TEST_true(WPACKET_get_total_written(&pkt, &written))
315 || !TEST_mem_eq(buf->data, written, alloc, sizeof(alloc)))
316 return cleanup(&pkt);
318 /* Repeat with WPACKET_sub_allocate_bytes */
319 if (!TEST_true(WPACKET_init_len(&pkt, buf, 1))
320 || !TEST_true(WPACKET_sub_allocate_bytes_u8(&pkt, 2, &bytes)))
321 return cleanup(&pkt);
324 if (!TEST_true(WPACKET_finish(&pkt))
325 || !TEST_true(WPACKET_get_total_written(&pkt, &written))
326 || !TEST_mem_eq(buf->data, written, submem, sizeof(submem)))
327 return cleanup(&pkt);
332 static int test_WPACKET_memcpy(void)
336 const unsigned char bytes[] = { 0xfe, 0xff };
338 if (!TEST_true(WPACKET_init_len(&pkt, buf, 1))
339 || !TEST_true(WPACKET_memcpy(&pkt, bytes, sizeof(bytes)))
340 || !TEST_true(WPACKET_finish(&pkt))
341 || !TEST_true(WPACKET_get_total_written(&pkt, &written))
342 || !TEST_mem_eq(buf->data, written, alloc, sizeof(alloc)))
343 return cleanup(&pkt);
345 /* Repeat with WPACKET_sub_memcpy() */
346 if (!TEST_true(WPACKET_init_len(&pkt, buf, 1))
347 || !TEST_true(WPACKET_sub_memcpy_u8(&pkt, bytes, sizeof(bytes)))
348 || !TEST_true(WPACKET_finish(&pkt))
349 || !TEST_true(WPACKET_get_total_written(&pkt, &written))
350 || !TEST_mem_eq(buf->data, written, submem, sizeof(submem)))
351 return cleanup(&pkt);
356 static int test_WPACKET_init_der(void)
359 unsigned char sbuf[1024];
360 unsigned char testdata[] = { 0x00, 0x01, 0x02, 0x03 };
361 unsigned char testdata2[259] = { 0x82, 0x01, 0x00 };
365 /* Test initialising for writing DER */
366 if (!TEST_true(WPACKET_init_der(&pkt, sbuf, sizeof(sbuf)))
367 || !TEST_true(WPACKET_put_bytes_u24(&pkt, 0xfffefd))
368 /* Test writing data in a length prefixed sub-packet */
369 || !TEST_true(WPACKET_start_sub_packet(&pkt))
370 || !TEST_true(WPACKET_memcpy(&pkt, testdata, sizeof(testdata)))
371 || !TEST_true(WPACKET_close(&pkt))
372 || !TEST_true(WPACKET_put_bytes_u8(&pkt, 0xfc))
373 || !TEST_true(WPACKET_finish(&pkt))
374 || !TEST_true(WPACKET_get_total_written(&pkt, &written[0]))
375 || !TEST_mem_eq(WPACKET_get_curr(&pkt), written[0], simpleder,
377 return cleanup(&pkt);
379 /* Generate random packet data for test */
380 if (!TEST_true(RAND_bytes(&testdata2[3], sizeof(testdata2) - 3)))
384 * Test with a sub-packet that has 2 length bytes. We do 2 passes - first
385 * with a NULL buffer, just to calculate lengths, and a second pass with a
386 * real buffer to actually generate a packet
388 for (i = 0; i < 2; i++) {
390 if (!TEST_true(WPACKET_init_null_der(&pkt)))
393 if (!TEST_true(WPACKET_init_der(&pkt, sbuf, sizeof(sbuf))))
396 if (!TEST_true(WPACKET_start_sub_packet(&pkt))
397 || !TEST_true(WPACKET_memcpy(&pkt, &testdata2[3],
398 sizeof(testdata2) - 3))
399 || !TEST_true(WPACKET_close(&pkt))
400 || !TEST_true(WPACKET_finish(&pkt))
401 || !TEST_true(WPACKET_get_total_written(&pkt, &written[i])))
402 return cleanup(&pkt);
406 * Check that the size calculated in the first pass equals the size of the
407 * packet actually generated in the second pass. Also check the generated
408 * packet looks as we expect it to.
410 if (!TEST_size_t_eq(written[0], written[1])
411 || !TEST_mem_eq(WPACKET_get_curr(&pkt), written[1], testdata2,
418 int setup_tests(void)
420 if (!TEST_ptr(buf = BUF_MEM_new()))
423 ADD_TEST(test_WPACKET_init);
424 ADD_TEST(test_WPACKET_set_max_size);
425 ADD_TEST(test_WPACKET_start_sub_packet);
426 ADD_TEST(test_WPACKET_set_flags);
427 ADD_TEST(test_WPACKET_allocate_bytes);
428 ADD_TEST(test_WPACKET_memcpy);
429 ADD_TEST(test_WPACKET_init_der);
433 void cleanup_tests(void)