diff options
Diffstat (limited to 'src/lib/krb4/lifetime.c')
| -rw-r--r-- | src/lib/krb4/lifetime.c | 109 |
1 files changed, 11 insertions, 98 deletions
diff --git a/src/lib/krb4/lifetime.c b/src/lib/krb4/lifetime.c index b43ed45..826e090 100644 --- a/src/lib/krb4/lifetime.c +++ b/src/lib/krb4/lifetime.c @@ -1,5 +1,5 @@ /* - * Copyright 2000, 2001 by the Massachusetts Institute of Technology. + * Copyright 2000, 2001, 2003 by the Massachusetts Institute of Technology. * All Rights Reserved. * * Export of this software from the United States of America may @@ -24,72 +24,7 @@ */ #include "krb.h" - -/* - * Only lifetime bytes values less than 128 are on a linear scale. - * The following table contains an exponential scale that covers the - * lifetime values 128 to 191 inclusive (a total of 64 values). - * Values greater than 191 get interpreted the same as 191, but they - * will never be generated by the functions in this file. - * - * The ratio is approximately 1.069144898 (actually exactly - * exp(log(67.5)/63), where 67.5 = 2592000/38400, and 259200 = 30 - * days, and 38400 = 128*5 minutes. This allows a lifetime byte of - * 191 to correspond to a ticket life of exactly 30 days and a - * lifetime byte of 128 to correspond to exactly 128*5 minutes, with - * the other values spread on an exponential curve fit in between - * them. This table should correspond exactly to the set of extended - * ticket lifetime values used by AFS and CMU. - * - * The following awk script is sufficient to reproduce the table: - * BEGIN { - * r = exp(log(2592000/38400)/63); - * x = 38400; - * for (i=0;i<64;i++) { - * printf("%d\n",x+0.5); - * x *= r; - * } - * } - */ -#ifndef SHORT_LIFETIME -#define NLIFETIMES 64 -static const KRB4_32 lifetimes[NLIFETIMES] = { - 38400, 41055, /* 00:10:40:00, 00:11:24:15 */ - 43894, 46929, /* 00:12:11:34, 00:13:02:09 */ - 50174, 53643, /* 00:13:56:14, 00:14:54:03 */ - 57352, 61318, /* 00:15:55:52, 00:17:01:58 */ - 65558, 70091, /* 00:18:12:38, 00:19:28:11 */ - 74937, 80119, /* 00:20:48:57, 00:22:15:19 */ - 85658, 91581, /* 00:23:47:38, 01:01:26:21 */ - 97914, 104684, /* 01:03:11:54, 01:05:04:44 */ - 111922, 119661, /* 01:07:05:22, 01:09:14:21 */ - 127935, 136781, /* 01:11:32:15, 01:13:59:41 */ - 146239, 156350, /* 01:16:37:19, 01:19:25:50 */ - 167161, 178720, /* 01:22:26:01, 02:01:38:40 */ - 191077, 204289, /* 02:05:04:37, 02:08:44:49 */ - 218415, 233517, /* 02:12:40:15, 02:16:51:57 */ - 249664, 266926, /* 02:21:21:04, 03:02:08:46 */ - 285383, 305116, /* 03:07:16:23, 03:12:45:16 */ - 326213, 348769, /* 03:18:36:53, 04:00:52:49 */ - 372885, 398668, /* 04:07:34:45, 04:14:44:28 */ - 426234, 455705, /* 04:22:23:54, 05:06:35:05 */ - 487215, 520904, /* 05:15:20:15, 06:00:41:44 */ - 556921, 595430, /* 06:10:42:01, 06:21:23:50 */ - 636601, 680618, /* 07:08:50:01, 07:21:03:38 */ - 727680, 777995, /* 08:10:08:00, 09:00:06:35 */ - 831789, 889303, /* 09:15:03:09, 10:07:01:43 */ - 950794, 1016537, /* 11:00:06:34, 11:18:22:17 */ - 1086825, 1161973, /* 12:13:53:45, 13:10:46:13 */ - 1242318, 1328218, /* 14:09:05:18, 15:08:56:58 */ - 1420057, 1518247, /* 16:10:27:37, 17:13:44:07 */ - 1623226, 1735464, /* 18:18:53:46, 20:02:04:24 */ - 1855462, 1983758, /* 21:11:24:22, 22:23:02:38 */ - 2120925, 2267576, /* 24:13:08:45, 26:05:52:56 */ - 2424367, 2592000 /* 28:01:26:07, 30:00:00:00 */ -}; -#define MINFIXED 0x80 -#define MAXFIXED (MINFIXED + NLIFETIMES - 1) -#endif /* !SHORT_LIFETIME */ +#include "k5-int.h" /* * krb_life_to_time @@ -100,17 +35,12 @@ static const KRB4_32 lifetimes[NLIFETIMES] = { KRB4_32 KRB5_CALLCONV krb_life_to_time(KRB4_32 start, int life) { - if (life < 0 || life > 255) /* possibly sign botch in caller */ + krb5int_access k5internals; + + if (krb5int_accessor(&k5internals, KRB5INT_ACCESS_VERSION) + || k5internals.krb_life_to_time == NULL) return start; -#ifndef SHORT_LIFETIME - if (life < MINFIXED) - return start + life * 5 * 60; - if (life > MAXFIXED) - return start + lifetimes[NLIFETIMES - 1]; - return start + lifetimes[life - MINFIXED]; -#else /* SHORT_LIFETIME */ - return start + life * 5 * 60; -#endif /* SHORT_LIFETIME */ + return k5internals.krb_life_to_time(start, life); } /* @@ -123,27 +53,10 @@ krb_life_to_time(KRB4_32 start, int life) int KRB5_CALLCONV krb_time_to_life(KRB4_32 start, KRB4_32 end) { - KRB4_32 dt; -#ifndef SHORT_LIFETIME - int i; -#endif + krb5int_access k5internals; - dt = end - start; - if (dt <= 0) + if (krb5int_accessor(&k5internals, KRB5INT_ACCESS_VERSION) + || k5internals.krb_time_to_life == NULL) return 0; -#ifndef SHORT_LIFETIME - if (dt < lifetimes[0]) - return (dt + 5 * 60 - 1) / (5 * 60); - /* This depends on the array being ordered. */ - for (i = 0; i < NLIFETIMES; i++) { - if (lifetimes[i] >= dt) - return i + MINFIXED; - } - return MAXFIXED; -#else /* SHORT_LIFETIME */ - if (dt > 5 * 60 * 255) - return 255; - else - return (dt + 5 * 60 - 1) / (5 * 60); -#endif /* SHORT_LIFETIME */ + return k5internals.krb_time_to_life(start, end); } |