1 /* $OpenBSD: asn1_string_to_utf8.c,v 1.2 2022/11/23 08:51:05 tb Exp $ */
2 /*
3 * Copyright (c) 2022 Theo Buehler <tb@openbsd.org>
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18 #include <err.h>
19 #include <string.h>
20
21 #include <openssl/asn1.h>
22
23 struct asn1_string_to_utf8_test_case {
24 const char *description;
25 const ASN1_ITEM *item;
26 const uint8_t der[32];
27 size_t der_len;
28 const uint8_t want[32];
29 int want_len;
30 };
31
32 static const struct asn1_string_to_utf8_test_case tests[] = {
33 {
34 .description = "hello",
35 .item = &ASN1_PRINTABLESTRING_it,
36 .der = {
37 0x13, 0x05, 0x68, 0x65, 0x6c, 0x6c, 0x6f,
38 },
39 .der_len = 7,
40 .want = {
41 0x68, 0x65, 0x6c, 0x6c, 0x6f,
42 },
43 .want_len = 5,
44 },
45 {
46 .description = "face with tears of joy",
47 .item = &ASN1_UTF8STRING_it,
48 .der = {
49 0x0c, 0x04, 0xF0, 0x9F, 0x98, 0x82,
50 },
51 .der_len = 6,
52 .want = {
53 0xF0, 0x9F, 0x98, 0x82,
54 },
55 .want_len = 4,
56 },
57 {
58 .description = "hi",
59 .item = &ASN1_IA5STRING_it,
60 .der = {
61 0x16, 0x02, 0x68, 0x69,
62 },
63 .der_len = 4,
64 .want = {
65 0x68, 0x69,
66 },
67 .want_len = 2,
68 },
69 };
70
71 const size_t N_TESTS = sizeof(tests) / sizeof(tests[0]);
72
73 static int
asn1_string_to_utf8_test(const struct asn1_string_to_utf8_test_case * test)74 asn1_string_to_utf8_test(const struct asn1_string_to_utf8_test_case *test)
75 {
76 ASN1_STRING *str = NULL;
77 const unsigned char *der;
78 unsigned char *out = NULL;
79 int ret;
80 int failed = 1;
81
82 der = test->der;
83 if ((str = (ASN1_STRING *)ASN1_item_d2i(NULL, &der, test->der_len,
84 test->item)) == NULL) {
85 warnx("ASN1_item_d2i failed");
86 goto err;
87 }
88
89 if ((ret = ASN1_STRING_to_UTF8(&out, str)) < 0) {
90 warnx("ASN1_STRING_to_UTF8 failed: got %d, want %d", ret,
91 test->want_len);
92 goto err;
93 }
94
95 if (ret != test->want_len) {
96 warnx("ASN1_STRING_to_UTF8: got %d, want %d", ret,
97 test->want_len);
98 goto err;
99 }
100
101 if (memcmp(out, test->want, test->want_len) != 0) {
102 warnx("memcmp failed");
103 goto err;
104 }
105
106 failed = 0;
107 err:
108 ASN1_STRING_free(str);
109 free(out);
110
111 return failed;
112 }
113
114 static int
asn1_string_to_utf8_tests(void)115 asn1_string_to_utf8_tests(void)
116 {
117 size_t i;
118 int failed = 0;
119
120 for (i = 0; i < N_TESTS; i++)
121 failed |= asn1_string_to_utf8_test(&tests[i]);
122
123 return failed;
124 }
125
126 int
main(void)127 main(void)
128 {
129 int failed = 0;
130
131 failed |= asn1_string_to_utf8_tests();
132
133 return failed;
134 }
135