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author | cvs2svn <admin@example.com> | 2025-04-14 17:32:06 +0000 |
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committer | cvs2svn <admin@example.com> | 2025-04-14 17:32:06 +0000 |
commit | eb8dd9dca1228af0cd132f515509051ecfabf6f6 (patch) | |
tree | edb6da6af7e865d488dc1a29309f1e1ec226e603 /src/lib/libcrypto/asn1/a_time_posix.c | |
parent | 247f0352e0ed72a4f476db9dc91f4d982bc83eb2 (diff) | |
download | openbsd-tb_20250414.tar.gz openbsd-tb_20250414.tar.bz2 openbsd-tb_20250414.zip |
This commit was manufactured by cvs2git to create tag 'tb_20250414'.tb_20250414
Diffstat (limited to 'src/lib/libcrypto/asn1/a_time_posix.c')
-rw-r--r-- | src/lib/libcrypto/asn1/a_time_posix.c | 296 |
1 files changed, 0 insertions, 296 deletions
diff --git a/src/lib/libcrypto/asn1/a_time_posix.c b/src/lib/libcrypto/asn1/a_time_posix.c deleted file mode 100644 index d4439b4701..0000000000 --- a/src/lib/libcrypto/asn1/a_time_posix.c +++ /dev/null | |||
@@ -1,296 +0,0 @@ | |||
1 | /* $OpenBSD: a_time_posix.c,v 1.5 2024/02/18 16:28:38 tb Exp $ */ | ||
2 | /* | ||
3 | * Copyright (c) 2022, Google Inc. | ||
4 | * Copyright (c) 2022, Bob Beck <beck@obtuse.com> | ||
5 | * | ||
6 | * Permission to use, copy, modify, and/or distribute this software for any | ||
7 | * purpose with or without fee is hereby granted, provided that the above | ||
8 | * copyright notice and this permission notice appear in all copies. | ||
9 | * | ||
10 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | ||
11 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | ||
12 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY | ||
13 | * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | ||
14 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION | ||
15 | * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN | ||
16 | * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | ||
17 | */ | ||
18 | |||
19 | /* | ||
20 | * Time conversion to/from POSIX time_t and struct tm, with no support | ||
21 | * for time zones other than UTC | ||
22 | */ | ||
23 | |||
24 | #include <inttypes.h> | ||
25 | #include <limits.h> | ||
26 | #include <stdint.h> | ||
27 | #include <string.h> | ||
28 | #include <time.h> | ||
29 | |||
30 | #include <openssl/asn1.h> | ||
31 | #include <openssl/posix_time.h> | ||
32 | |||
33 | #include "crypto_internal.h" | ||
34 | |||
35 | #define SECS_PER_HOUR (int64_t)(60 * 60) | ||
36 | #define SECS_PER_DAY (int64_t)(24 * SECS_PER_HOUR) | ||
37 | |||
38 | /* | ||
39 | * Is a year/month/day combination valid, in the range from year 0000 | ||
40 | * to 9999? | ||
41 | */ | ||
42 | static int | ||
43 | is_valid_date(int64_t year, int64_t month, int64_t day) | ||
44 | { | ||
45 | int days_in_month; | ||
46 | if (day < 1 || month < 1 || year < 0 || year > 9999) | ||
47 | return 0; | ||
48 | switch (month) { | ||
49 | case 1: | ||
50 | case 3: | ||
51 | case 5: | ||
52 | case 7: | ||
53 | case 8: | ||
54 | case 10: | ||
55 | case 12: | ||
56 | days_in_month = 31; | ||
57 | break; | ||
58 | case 4: | ||
59 | case 6: | ||
60 | case 9: | ||
61 | case 11: | ||
62 | days_in_month = 30; | ||
63 | break; | ||
64 | case 2: | ||
65 | if ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0) | ||
66 | days_in_month = 29; | ||
67 | else | ||
68 | days_in_month = 28; | ||
69 | break; | ||
70 | default: | ||
71 | return 0; | ||
72 | } | ||
73 | return day <= days_in_month; | ||
74 | } | ||
75 | |||
76 | /* | ||
77 | * Is a time valid? Leap seconds of 60 are not considered valid, as | ||
78 | * the POSIX time in seconds does not include them. | ||
79 | */ | ||
80 | static int | ||
81 | is_valid_time(int hours, int minutes, int seconds) | ||
82 | { | ||
83 | return hours >= 0 && minutes >= 0 && seconds >= 0 && hours <= 23 && | ||
84 | minutes <= 59 && seconds <= 59; | ||
85 | } | ||
86 | |||
87 | /* 0000-01-01 00:00:00 UTC */ | ||
88 | #define MIN_POSIX_TIME INT64_C(-62167219200) | ||
89 | /* 9999-12-31 23:59:59 UTC */ | ||
90 | #define MAX_POSIX_TIME INT64_C(253402300799) | ||
91 | |||
92 | /* Is a int64 time representing a time within our expected range? */ | ||
93 | static int | ||
94 | is_valid_posix_time(int64_t time) | ||
95 | { | ||
96 | return MIN_POSIX_TIME <= time && time <= MAX_POSIX_TIME; | ||
97 | } | ||
98 | |||
99 | /* | ||
100 | * Inspired by algorithms presented in | ||
101 | * https://howardhinnant.github.io/date_algorithms.html | ||
102 | * (Public Domain) | ||
103 | */ | ||
104 | static int | ||
105 | posix_time_from_utc(int64_t year, int64_t month, int64_t day, int64_t hours, | ||
106 | int64_t minutes, int64_t seconds, int64_t *out_time) | ||
107 | { | ||
108 | int64_t era, year_of_era, day_of_year, day_of_era, posix_days; | ||
109 | |||
110 | if (!is_valid_date(year, month, day) || | ||
111 | !is_valid_time(hours, minutes, seconds)) | ||
112 | return 0; | ||
113 | if (month <= 2) | ||
114 | year--; /* Start years on Mar 1, so leap days end a year. */ | ||
115 | |||
116 | /* At this point year will be in the range -1 and 9999.*/ | ||
117 | era = (year >= 0 ? year : year - 399) / 400; | ||
118 | year_of_era = year - era * 400; | ||
119 | day_of_year = (153 * (month > 2 ? month - 3 : month + 9) + 2) / | ||
120 | 5 + day - 1; | ||
121 | day_of_era = year_of_era * 365 + year_of_era / 4 - year_of_era / | ||
122 | 100 + day_of_year; | ||
123 | posix_days = era * 146097 + day_of_era - 719468; | ||
124 | *out_time = posix_days * SECS_PER_DAY + hours * SECS_PER_HOUR + | ||
125 | minutes * 60 + seconds; | ||
126 | |||
127 | return 1; | ||
128 | } | ||
129 | |||
130 | /* | ||
131 | * Inspired by algorithms presented in | ||
132 | * https://howardhinnant.github.io/date_algorithms.html | ||
133 | * (Public Domain) | ||
134 | */ | ||
135 | static int | ||
136 | utc_from_posix_time(int64_t time, int *out_year, int *out_month, int *out_day, | ||
137 | int *out_hours, int *out_minutes, int *out_seconds) | ||
138 | { | ||
139 | int64_t days, leftover_seconds, era, day_of_era, year_of_era, | ||
140 | day_of_year, month_of_year; | ||
141 | |||
142 | if (!is_valid_posix_time(time)) | ||
143 | return 0; | ||
144 | |||
145 | days = time / SECS_PER_DAY; | ||
146 | leftover_seconds = time % SECS_PER_DAY; | ||
147 | if (leftover_seconds < 0) { | ||
148 | days--; | ||
149 | leftover_seconds += SECS_PER_DAY; | ||
150 | } | ||
151 | days += 719468; /* Shift to starting epoch of Mar 1 0000. */ | ||
152 | |||
153 | /* At this point, days will be in the range -61 and 3652364. */ | ||
154 | era = (days > 0 ? days : days - 146096) / 146097; | ||
155 | day_of_era = days - era * 146097; | ||
156 | year_of_era = (day_of_era - day_of_era / 1460 + day_of_era / 36524 - | ||
157 | day_of_era / 146096) / | ||
158 | 365; | ||
159 | *out_year = year_of_era + era * 400; /* Year starts on Mar 1 */ | ||
160 | day_of_year = day_of_era - (365 * year_of_era + year_of_era / 4 - | ||
161 | year_of_era / 100); | ||
162 | month_of_year = (5 * day_of_year + 2) / 153; | ||
163 | *out_month = (month_of_year < 10 ? month_of_year + 3 : | ||
164 | month_of_year - 9); | ||
165 | if (*out_month <= 2) | ||
166 | (*out_year)++; /* Adjust year back to Jan 1 start of year. */ | ||
167 | |||
168 | *out_day = day_of_year - (153 * month_of_year + 2) / 5 + 1; | ||
169 | *out_hours = leftover_seconds / SECS_PER_HOUR; | ||
170 | leftover_seconds %= SECS_PER_HOUR; | ||
171 | *out_minutes = leftover_seconds / 60; | ||
172 | *out_seconds = leftover_seconds % 60; | ||
173 | |||
174 | return 1; | ||
175 | } | ||
176 | |||
177 | int | ||
178 | OPENSSL_tm_to_posix(const struct tm *tm, int64_t *out) | ||
179 | { | ||
180 | return posix_time_from_utc(tm->tm_year + (int64_t)1900, | ||
181 | tm->tm_mon + (int64_t)1, tm->tm_mday, tm->tm_hour, tm->tm_min, | ||
182 | tm->tm_sec, out); | ||
183 | } | ||
184 | LCRYPTO_ALIAS(OPENSSL_tm_to_posix); | ||
185 | |||
186 | int | ||
187 | OPENSSL_posix_to_tm(int64_t time, struct tm *out_tm) | ||
188 | { | ||
189 | struct tm tmp_tm = {0}; | ||
190 | |||
191 | memset(out_tm, 0, sizeof(*out_tm)); | ||
192 | |||
193 | if (!utc_from_posix_time(time, &tmp_tm.tm_year, &tmp_tm.tm_mon, | ||
194 | &tmp_tm.tm_mday, &tmp_tm.tm_hour, &tmp_tm.tm_min, &tmp_tm.tm_sec)) | ||
195 | return 0; | ||
196 | |||
197 | tmp_tm.tm_year -= 1900; | ||
198 | tmp_tm.tm_mon -= 1; | ||
199 | |||
200 | *out_tm = tmp_tm; | ||
201 | |||
202 | return 1; | ||
203 | } | ||
204 | LCRYPTO_ALIAS(OPENSSL_posix_to_tm); | ||
205 | |||
206 | int | ||
207 | asn1_time_tm_to_time_t(const struct tm *tm, time_t *out) | ||
208 | { | ||
209 | int64_t posix_time; | ||
210 | |||
211 | if (!OPENSSL_tm_to_posix(tm, &posix_time)) | ||
212 | return 0; | ||
213 | |||
214 | #ifdef SMALL_TIME_T | ||
215 | /* For portable. */ | ||
216 | if (sizeof(time_t) == sizeof(int32_t) && | ||
217 | (posix_time > INT32_MAX || posix_time < INT32_MIN)) | ||
218 | return 0; | ||
219 | #endif | ||
220 | |||
221 | *out = posix_time; | ||
222 | return 1; | ||
223 | } | ||
224 | |||
225 | int | ||
226 | asn1_time_time_t_to_tm(const time_t *time, struct tm *out_tm) | ||
227 | { | ||
228 | int64_t posix_time = *time; | ||
229 | |||
230 | return OPENSSL_posix_to_tm(posix_time, out_tm); | ||
231 | } | ||
232 | |||
233 | int | ||
234 | OPENSSL_timegm(const struct tm *tm, time_t *out) { | ||
235 | return asn1_time_tm_to_time_t(tm, out); | ||
236 | } | ||
237 | LCRYPTO_ALIAS(OPENSSL_timegm); | ||
238 | |||
239 | struct tm * | ||
240 | OPENSSL_gmtime(const time_t *time, struct tm *out_tm) { | ||
241 | if (!asn1_time_time_t_to_tm(time, out_tm)) | ||
242 | return NULL; | ||
243 | return out_tm; | ||
244 | } | ||
245 | LCRYPTO_ALIAS(OPENSSL_gmtime); | ||
246 | |||
247 | /* Public API in OpenSSL. BoringSSL uses int64_t instead of long. */ | ||
248 | int | ||
249 | OPENSSL_gmtime_adj(struct tm *tm, int offset_day, int64_t offset_sec) | ||
250 | { | ||
251 | int64_t posix_time; | ||
252 | |||
253 | if (!OPENSSL_tm_to_posix(tm, &posix_time)) | ||
254 | return 0; | ||
255 | |||
256 | CTASSERT(INT_MAX <= INT64_MAX / SECS_PER_DAY); | ||
257 | CTASSERT(MAX_POSIX_TIME <= INT64_MAX - INT_MAX * SECS_PER_DAY); | ||
258 | CTASSERT(MIN_POSIX_TIME >= INT64_MIN - INT_MIN * SECS_PER_DAY); | ||
259 | |||
260 | posix_time += offset_day * SECS_PER_DAY; | ||
261 | |||
262 | if (posix_time > 0 && offset_sec > INT64_MAX - posix_time) | ||
263 | return 0; | ||
264 | if (posix_time < 0 && offset_sec < INT64_MIN - posix_time) | ||
265 | return 0; | ||
266 | posix_time += offset_sec; | ||
267 | |||
268 | if (!OPENSSL_posix_to_tm(posix_time, tm)) | ||
269 | return 0; | ||
270 | |||
271 | return 1; | ||
272 | } | ||
273 | |||
274 | int | ||
275 | OPENSSL_gmtime_diff(int *out_days, int *out_secs, const struct tm *from, | ||
276 | const struct tm *to) | ||
277 | { | ||
278 | int64_t time_to, time_from, timediff, daydiff; | ||
279 | |||
280 | if (!OPENSSL_tm_to_posix(to, &time_to) || | ||
281 | !OPENSSL_tm_to_posix(from, &time_from)) | ||
282 | return 0; | ||
283 | |||
284 | /* Times are in range, so these calculations cannot overflow. */ | ||
285 | CTASSERT(SECS_PER_DAY <= INT_MAX); | ||
286 | CTASSERT((MAX_POSIX_TIME - MIN_POSIX_TIME) / SECS_PER_DAY <= INT_MAX); | ||
287 | |||
288 | timediff = time_to - time_from; | ||
289 | daydiff = timediff / SECS_PER_DAY; | ||
290 | timediff %= SECS_PER_DAY; | ||
291 | |||
292 | *out_secs = timediff; | ||
293 | *out_days = daydiff; | ||
294 | |||
295 | return 1; | ||
296 | } | ||