Kerberos IV code, based on a merge of fixed code from KTH and original

4.4BSD Lite code (international edition).  Provides all functionality
from the original 4.4BSD code plus standard Kerberos elements that were
omitted in the 4.4BSD code.

1 files changed, 234 insertions, 0 deletions

diff --git a/kerberosIV/krb/lifetime.c b/kerberosIV/krb/lifetime.c
new file mode 100644
index 00000000000..e022f3215bc
--- /dev/null
+++ b/kerberosIV/krb/lifetime.c
@@ -0,0 +1,234 @@
+/*
+ * This software may now be redistributed outside the US.
+ *
+ * $Source: /cvs/OpenBSD/src/kerberosIV/krb/Attic/lifetime.c,v $
+ *
+ * $Locker:  $
+ */
+
+/***************************************************************************
+ * PRE-HISTORY
+ *
+ * Revision 2.1.2.2  91/11/08  00:35:25  mja
+ * 	Lower NEVERDATE to a positive value since time values are not
+ * 	handled properly by most of the rest of the system when
+ * 	negative;  add krb_life_to_atime() and krb_atime_to_life().
+ * 	[91/11/07  22:52:50  mja]
+ * 
+ * Revision 2.1.2.1  91/07/09  22:50:42  mja
+ * 	Created.
+ * 	[91/01/30            jm36@ANDREW.CMU.EDU]
+ * 
+ ***************************************************************************/
+
+/*
+ * Ticket lifetime.  This defines the table used to lookup lifetime
+ * for the fixed part of rande of the one byte lifetime field.  Values
+ * less than 0x80 are intrpreted as the number of 5 minute intervals.
+ * Values from 0x80 to 0xBF should be looked up in this table.  The
+ * value of 0x80 is the same using both methods: 10 and two-thirds
+ * hours .  The lifetime of 0xBF is 30 days.  The intervening values
+ * of have a fixed ratio of roughly 1.06914.  The value 0xFF is
+ * defined to mean a ticket has no expiration time.  This should be
+ * used advisedly since individual servers may impose defacto
+ * upperbounds on ticket lifetimes.
+ */
+
+#include "krb_locl.h"
+
+#define TKTLIFENUMFIXED 64
+#define TKTLIFEMINFIXED 0x80
+#define TKTLIFEMAXFIXED 0xBF
+#define TKTLIFENOEXPIRE 0xFF
+#define MAXTKTLIFETIME	(30*24*3600)	/* 30 days */
+#ifndef NEVERDATE
+#define NEVERDATE ((unsigned long)0x7fffffffL)
+#endif
+
+static const int tkt_lifetimes[TKTLIFENUMFIXED] = {
+    38400,				/* 10.67 hours, 0.44 days */ 
+    41055,				/* 11.40 hours, 0.48 days */ 
+    43894,				/* 12.19 hours, 0.51 days */ 
+    46929,				/* 13.04 hours, 0.54 days */ 
+    50174,				/* 13.94 hours, 0.58 days */ 
+    53643,				/* 14.90 hours, 0.62 days */ 
+    57352,				/* 15.93 hours, 0.66 days */ 
+    61318,				/* 17.03 hours, 0.71 days */ 
+    65558,				/* 18.21 hours, 0.76 days */ 
+    70091,				/* 19.47 hours, 0.81 days */ 
+    74937,				/* 20.82 hours, 0.87 days */ 
+    80119,				/* 22.26 hours, 0.93 days */ 
+    85658,				/* 23.79 hours, 0.99 days */ 
+    91581,				/* 25.44 hours, 1.06 days */ 
+    97914,				/* 27.20 hours, 1.13 days */ 
+    104684,				/* 29.08 hours, 1.21 days */ 
+    111922,				/* 31.09 hours, 1.30 days */ 
+    119661,				/* 33.24 hours, 1.38 days */ 
+    127935,				/* 35.54 hours, 1.48 days */ 
+    136781,				/* 37.99 hours, 1.58 days */ 
+    146239,				/* 40.62 hours, 1.69 days */ 
+    156350,				/* 43.43 hours, 1.81 days */ 
+    167161,				/* 46.43 hours, 1.93 days */ 
+    178720,				/* 49.64 hours, 2.07 days */ 
+    191077,				/* 53.08 hours, 2.21 days */ 
+    204289,				/* 56.75 hours, 2.36 days */ 
+    218415,				/* 60.67 hours, 2.53 days */ 
+    233517,				/* 64.87 hours, 2.70 days */ 
+    249664,				/* 69.35 hours, 2.89 days */ 
+    266926,				/* 74.15 hours, 3.09 days */ 
+    285383,				/* 79.27 hours, 3.30 days */ 
+    305116,				/* 84.75 hours, 3.53 days */ 
+    326213,				/* 90.61 hours, 3.78 days */ 
+    348769,				/* 96.88 hours, 4.04 days */ 
+    372885,				/* 103.58 hours, 4.32 days */ 
+    398668,				/* 110.74 hours, 4.61 days */ 
+    426234,				/* 118.40 hours, 4.93 days */ 
+    455705,				/* 126.58 hours, 5.27 days */ 
+    487215,				/* 135.34 hours, 5.64 days */ 
+    520904,				/* 144.70 hours, 6.03 days */ 
+    556921,				/* 154.70 hours, 6.45 days */ 
+    595430,				/* 165.40 hours, 6.89 days */ 
+    636601,				/* 176.83 hours, 7.37 days */ 
+    680618,				/* 189.06 hours, 7.88 days */ 
+    727680,				/* 202.13 hours, 8.42 days */ 
+    777995,				/* 216.11 hours, 9.00 days */ 
+    831789,				/* 231.05 hours, 9.63 days */ 
+    889303,				/* 247.03 hours, 10.29 days */ 
+    950794,				/* 264.11 hours, 11.00 days */ 
+    1016537,				/* 282.37 hours, 11.77 days */ 
+    1086825,				/* 301.90 hours, 12.58 days */ 
+    1161973,				/* 322.77 hours, 13.45 days */ 
+    1242318,				/* 345.09 hours, 14.38 days */ 
+    1328218,				/* 368.95 hours, 15.37 days */ 
+    1420057,				/* 394.46 hours, 16.44 days */ 
+    1518247,				/* 421.74 hours, 17.57 days */ 
+    1623226,				/* 450.90 hours, 18.79 days */ 
+    1735464,				/* 482.07 hours, 20.09 days */ 
+    1855462,				/* 515.41 hours, 21.48 days */ 
+    1983758,				/* 551.04 hours, 22.96 days */ 
+    2120925,				/* 589.15 hours, 24.55 days */ 
+    2267576,				/* 629.88 hours, 26.25 days */ 
+    2424367,				/* 673.44 hours, 28.06 days */ 
+    2592000};				/* 720.00 hours, 30.00 days */ 
+
+/*
+ * krb_life_to_time - takes a start time and a Kerberos standard
+ * lifetime char and returns the corresponding end time.  There are
+ * four simple cases to be handled.  The first is a life of 0xff,
+ * meaning no expiration, and results in an end time of 0xffffffff.
+ * The second is when life is less than the values covered by the
+ * table.  In this case, the end time is the start time plus the
+ * number of 5 minute intervals specified by life.  The third case
+ * returns start plus the MAXTKTLIFETIME if life is greater than
+ * TKTLIFEMAXFIXED.  The last case, uses the life value (minus
+ * TKTLIFEMINFIXED) as an index into the table to extract the lifetime
+ * in seconds, which is added to start to produce the end time.
+ */
+u_int32_t
+krb_life_to_time(start, life)
+	u_int32_t start;
+	int life;
+{
+    life = (unsigned char) life;
+    if (life == TKTLIFENOEXPIRE) return NEVERDATE;
+    if (life < TKTLIFEMINFIXED) return start + life*5*60;
+    if (life > TKTLIFEMAXFIXED) return start + MAXTKTLIFETIME;
+    return start + tkt_lifetimes[life - TKTLIFEMINFIXED];
+}
+
+/*
+ * krb_time_to_life - takes start and end times for the ticket and
+ * returns a Kerberos standard lifetime char, possibily using the
+ * tkt_lifetimes table for lifetimes above 127*5 minutes.  First, the
+ * special case of (end == NEVERDATE) is handled to mean no
+ * expiration.  Then negative lifetimes and those greater than the
+ * maximum ticket lifetime are rejected.  Then lifetimes less than the
+ * first table entry are handled by rounding the requested lifetime
+ * *up* to the next 5 minute interval.  The final step is to search
+ * the table for the smallest entry *greater than or equal* to the
+ * requested entry.
+ */
+int
+krb_time_to_life(start, end)
+	u_int32_t start;
+	u_int32_t end;
+{
+    long lifetime;
+    int i;
+
+    if (end >= NEVERDATE) return TKTLIFENOEXPIRE;
+    lifetime = end - start;
+    if (lifetime > MAXTKTLIFETIME || lifetime <= 0) return 0;
+    if (lifetime < tkt_lifetimes[0]) return (lifetime + 5*60 - 1)/(5*60);
+    for (i=0; i<TKTLIFENUMFIXED; i++) {
+	if (lifetime <= tkt_lifetimes[i]) {
+	    return i+TKTLIFEMINFIXED;
+	}
+    }
+    return 0;
+}
+
+char *
+krb_life_to_atime(life)
+	int life;
+{
+    static char atime[11+1+2+1+2+1+2+1];
+    unsigned long when;
+    int secs, mins, hours;
+
+    if (life == TKTLIFENOEXPIRE)
+	return("Forever");
+    when = krb_life_to_time(0, life);
+    secs = when%60;
+    when /= 60;
+    mins = when%60;
+    when /= 60;
+    hours = when%24;
+    when /= 24;
+    sprintf(atime, "%d+%02d:%02d:%02d", (int)when, hours, mins, secs);
+    return(atime);
+}
+
+int
+krb_atime_to_life(atime)
+	char *atime;
+{
+    unsigned long when = 0;
+    register char *cp;
+    int colon = 0, plus = 0;
+    int n = 0;
+
+    if (strcasecmp(atime, "forever") == 0)
+	return(TKTLIFENOEXPIRE);
+    
+    for (cp=atime; *cp; cp++) {
+	switch(*cp) {
+	    case '0': case '1': case '2': case '3': case '4':
+	    case '5': case '6': case '7': case '8': case '9':
+		n = n*10 + *cp-'0';
+		break;
+	    case '+':
+		plus++;
+		when += n;
+		when *= 24;
+		n = 0;
+		break;
+	    case ':':
+		colon++;
+		when += n;
+		when *= 60;
+		n = 0;
+		break;
+	    default:
+		break;
+	}
+    }
+    when += n;
+    if (plus == 0 && colon == 0)
+	return((unsigned char)when);
+    while (colon < 2) {
+	when *= 60;
+	colon++;
+    }
+    return(krb_time_to_life(0,when));
+}