1 /* Copyright (C) 1995-1998 Eric Young ([email protected])
2 * All rights reserved.
3 *
4 * This package is an SSL implementation written
5 * by Eric Young ([email protected]).
6 * The implementation was written so as to conform with Netscapes SSL.
7 *
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson ([email protected]).
14 *
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
21 *
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
24 * are met:
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young ([email protected])"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson ([email protected])"
39 *
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 * SUCH DAMAGE.
51 *
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.] */
56
57 #include <openssl/asn1.h>
58 #include <openssl/bytestring.h>
59 #include <openssl/err.h>
60 #include <openssl/mem.h>
61 #include <openssl/posix_time.h>
62
63 #include <stdlib.h>
64 #include <string.h>
65 #include <time.h>
66
67 #include "internal.h"
68
asn1_utctime_to_tm(struct tm * tm,const ASN1_UTCTIME * d,int allow_timezone_offset)69 int asn1_utctime_to_tm(struct tm *tm, const ASN1_UTCTIME *d,
70 int allow_timezone_offset) {
71 if (d->type != V_ASN1_UTCTIME) {
72 return 0;
73 }
74 CBS cbs;
75 CBS_init(&cbs, d->data, (size_t)d->length);
76 if (!CBS_parse_utc_time(&cbs, tm, allow_timezone_offset)) {
77 return 0;
78 }
79 return 1;
80 }
81
ASN1_UTCTIME_check(const ASN1_UTCTIME * d)82 int ASN1_UTCTIME_check(const ASN1_UTCTIME *d) {
83 return asn1_utctime_to_tm(NULL, d, /*allow_timezone_offset=*/1);
84 }
85
ASN1_UTCTIME_set_string(ASN1_UTCTIME * s,const char * str)86 int ASN1_UTCTIME_set_string(ASN1_UTCTIME *s, const char *str) {
87 // Although elsewhere we allow timezone offsets with UTCTime, to be compatible
88 // with some existing misissued certificates, this function is used to
89 // construct new certificates and can be stricter.
90 size_t len = strlen(str);
91 CBS cbs;
92 CBS_init(&cbs, (const uint8_t *)str, len);
93 if (!CBS_parse_utc_time(&cbs, /*out_tm=*/NULL,
94 /*allow_timezone_offset=*/0)) {
95 return 0;
96 }
97 if (s != NULL) {
98 if (!ASN1_STRING_set(s, str, len)) {
99 return 0;
100 }
101 s->type = V_ASN1_UTCTIME;
102 }
103 return 1;
104 }
105
ASN1_UTCTIME_set(ASN1_UTCTIME * s,int64_t posix_time)106 ASN1_UTCTIME *ASN1_UTCTIME_set(ASN1_UTCTIME *s, int64_t posix_time) {
107 return ASN1_UTCTIME_adj(s, posix_time, 0, 0);
108 }
109
ASN1_UTCTIME_adj(ASN1_UTCTIME * s,int64_t posix_time,int offset_day,long offset_sec)110 ASN1_UTCTIME *ASN1_UTCTIME_adj(ASN1_UTCTIME *s, int64_t posix_time, int offset_day,
111 long offset_sec) {
112 struct tm data;
113 if (!OPENSSL_posix_to_tm(posix_time, &data)) {
114 return NULL;
115 }
116
117 if (offset_day || offset_sec) {
118 if (!OPENSSL_gmtime_adj(&data, offset_day, offset_sec)) {
119 return NULL;
120 }
121 }
122
123 if (data.tm_year < 50 || data.tm_year >= 150) {
124 return NULL;
125 }
126
127 char buf[14];
128 int ret = snprintf(buf, sizeof(buf), "%02d%02d%02d%02d%02d%02dZ",
129 data.tm_year % 100, data.tm_mon + 1, data.tm_mday,
130 data.tm_hour, data.tm_min, data.tm_sec);
131 if (ret != (int)(sizeof(buf) - 1)) {
132 abort(); // |snprintf| should neither truncate nor write fewer bytes.
133 }
134
135 int free_s = 0;
136 if (s == NULL) {
137 free_s = 1;
138 s = ASN1_UTCTIME_new();
139 if (s == NULL) {
140 return NULL;
141 }
142 }
143
144 if (!ASN1_STRING_set(s, buf, strlen(buf))) {
145 if (free_s) {
146 ASN1_UTCTIME_free(s);
147 }
148 return NULL;
149 }
150 s->type = V_ASN1_UTCTIME;
151 return s;
152 }
153
ASN1_UTCTIME_cmp_time_t(const ASN1_UTCTIME * s,time_t t)154 int ASN1_UTCTIME_cmp_time_t(const ASN1_UTCTIME *s, time_t t) {
155 struct tm stm, ttm;
156 int day, sec;
157
158 if (!asn1_utctime_to_tm(&stm, s, /*allow_timezone_offset=*/1)) {
159 return -2;
160 }
161
162 if (!OPENSSL_posix_to_tm(t, &ttm)) {
163 return -2;
164 }
165
166 if (!OPENSSL_gmtime_diff(&day, &sec, &ttm, &stm)) {
167 return -2;
168 }
169
170 if (day > 0) {
171 return 1;
172 }
173 if (day < 0) {
174 return -1;
175 }
176 if (sec > 0) {
177 return 1;
178 }
179 if (sec < 0) {
180 return -1;
181 }
182 return 0;
183 }
184