buffertest.c revision 1.4 
1/*
2 * Copyright (c) 2019 Joel Sing <jsing@openbsd.org>
3 *
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17#include <err.h>
18#include <stdio.h>
19#include <stdlib.h>
20#include <string.h>
21
22#include "tls_internal.h"
23
24uint8_t testdata[] = {
25	0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
26	0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
27};
28
29struct read_state {
30	uint8_t *buf;
31	size_t len;
32	size_t offset;
33};
34
35static ssize_t
36read_cb(void *buf, size_t buflen, void *cb_arg)
37{
38	struct read_state *rs = cb_arg;
39	ssize_t n;
40
41	if (rs->offset > rs->len)
42		return TLS_IO_EOF;
43
44	if ((size_t)(n = buflen) > (rs->len - rs->offset))
45		n = rs->len - rs->offset;
46
47	if (n == 0)
48		return TLS_IO_WANT_POLLIN;
49
50	memcpy(buf, &rs->buf[rs->offset], n);
51	rs->offset += n;
52
53	return n;
54}
55
56struct extend_test {
57	size_t extend_len;
58	size_t read_len;
59	ssize_t want_ret;
60};
61
62struct extend_test extend_tests[] = {
63	{
64		.extend_len = 4,
65		.read_len = 0,
66		.want_ret = TLS_IO_WANT_POLLIN,
67	},
68	{
69		.extend_len = 4,
70		.read_len = 8,
71		.want_ret = 4,
72	},
73	{
74		.extend_len = 12,
75		.read_len = 8,
76		.want_ret = TLS_IO_WANT_POLLIN,
77	},
78	{
79		.extend_len = 12,
80		.read_len = 10,
81		.want_ret = TLS_IO_WANT_POLLIN,
82	},
83	{
84		.extend_len = 12,
85		.read_len = 12,
86		.want_ret = 12,
87	},
88	{
89		.extend_len = 16,
90		.read_len = 16,
91		.want_ret = 16,
92	},
93	{
94		.extend_len = 20,
95		.read_len = 1,
96		.want_ret = TLS_IO_EOF,
97	},
98};
99
100#define N_EXTEND_TESTS (sizeof(extend_tests) / sizeof(extend_tests[0]))
101
102int
103main(int argc, char **argv)
104{
105	struct tls_buffer *buf;
106	struct extend_test *et;
107	struct read_state rs;
108	uint8_t *data;
109	size_t i, data_len;
110	ssize_t ret;
111	CBS cbs;
112
113	rs.buf = testdata;
114	rs.offset = 0;
115
116	if ((buf = tls_buffer_new(0)) == NULL)
117		errx(1, "tls_buffer_new");
118
119	for (i = 0; i < N_EXTEND_TESTS; i++) {
120		et = &extend_tests[i];
121		rs.len = et->read_len;
122
123		ret = tls_buffer_extend(buf, et->extend_len, read_cb, &rs);
124		if (ret != extend_tests[i].want_ret) {
125			fprintf(stderr, "FAIL: Test %zi - extend returned %zi, "
126			    "want %zi\n", i, ret, et->want_ret);
127			return 1;
128		}
129
130		tls_buffer_cbs(buf, &cbs);
131
132		if (!CBS_mem_equal(&cbs, testdata, CBS_len(&cbs))) {
133			fprintf(stderr, "FAIL: Test %zi - extend buffer "
134			    "mismatch", i);
135			return 1;
136		}
137	}
138
139	if (!tls_buffer_finish(buf, &data, &data_len)) {
140		fprintf(stderr, "FAIL: failed to finish\n");
141		return 1;
142	}
143
144	tls_buffer_free(buf);
145
146	if (data_len != sizeof(testdata)) {
147		fprintf(stderr, "FAIL: got data length %zu, want %zu\n",
148		    data_len, sizeof(testdata));
149		return 1;
150	}
151	if (memcmp(data, testdata, data_len) != 0) {
152		fprintf(stderr, "FAIL: data mismatch\n");
153		return 1;
154	}
155	free(data);
156
157	return 0;
158}
159