1 /* 2 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 3 * Use is subject to license terms. 4 */ 5 6 7 /* 8 * lib/kadm/str_conv.c 9 * 10 * Copyright 1995, 1999 by the Massachusetts Institute of Technology. 11 * All Rights Reserved. 12 * 13 * Export of this software from the United States of America may 14 * require a specific license from the United States Government. 15 * It is the responsibility of any person or organization contemplating 16 * export to obtain such a license before exporting. 17 * 18 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and 19 * distribute this software and its documentation for any purpose and 20 * without fee is hereby granted, provided that the above copyright 21 * notice appear in all copies and that both that copyright notice and 22 * this permission notice appear in supporting documentation, and that 23 * the name of M.I.T. not be used in advertising or publicity pertaining 24 * to distribution of the software without specific, written prior 25 * permission. Furthermore if you modify this software you must label 26 * your software as modified software and not distribute it in such a 27 * fashion that it might be confused with the original M.I.T. software. 28 * M.I.T. makes no representations about the suitability of 29 * this software for any purpose. It is provided "as is" without express 30 * or implied warranty. 31 * 32 */ 33 34 /* 35 * str_conv.c - Convert between strings and Kerberos internal data. 36 */ 37 38 /* 39 * Table of contents: 40 * 41 * String decoding: 42 * ---------------- 43 * krb5_string_to_salttype() - Convert string to salttype (krb5_int32) 44 * krb5_string_to_timestamp() - Convert string to krb5_timestamp. 45 * krb5_string_to_deltat() - Convert string to krb5_deltat. 46 * 47 * String encoding: 48 * ---------------- 49 * krb5_salttype_to_string() - Convert salttype (krb5_int32) to string. 50 * krb5_timestamp_to_string() - Convert krb5_timestamp to string. 51 * krb5_timestamp_to_sfstring() - Convert krb5_timestamp to short filled string 52 * krb5_deltat_to_string() - Convert krb5_deltat to string. 53 */ 54 55 #include "k5-int.h" 56 #include <ctype.h> 57 58 /* Salt type conversions */ 59 60 /* 61 * Local data structures. 62 */ 63 struct salttype_lookup_entry { 64 krb5_int32 stt_enctype; /* Salt type */ 65 const char * stt_specifier; /* How to recognize it */ 66 const char * stt_output; /* How to spit it out */ 67 }; 68 69 /* 70 * Lookup tables. 71 */ 72 73 #include "kdb.h" 74 static const struct salttype_lookup_entry salttype_table[] = { 75 /* salt type input specifier output string */ 76 /*----------------------------- --------------- ---------------*/ 77 { KRB5_KDB_SALTTYPE_NORMAL, "normal", "Version 5" }, 78 { KRB5_KDB_SALTTYPE_V4, "v4", "Version 4" }, 79 { KRB5_KDB_SALTTYPE_NOREALM, "norealm", "Version 5 - No Realm" }, 80 { KRB5_KDB_SALTTYPE_ONLYREALM, "onlyrealm", "Version 5 - Realm Only" }, 81 { KRB5_KDB_SALTTYPE_SPECIAL, "special", "Special" }, 82 { KRB5_KDB_SALTTYPE_AFS3, "afs3", "AFS version 3" } 83 }; 84 static const int salttype_table_nents = sizeof(salttype_table)/ 85 sizeof(salttype_table[0]); 86 87 krb5_error_code KRB5_CALLCONV 88 krb5_string_to_salttype(char *string, krb5_int32 *salttypep) 89 { 90 int i; 91 int found; 92 93 found = 0; 94 for (i=0; i<salttype_table_nents; i++) { 95 if (!strcasecmp(string, salttype_table[i].stt_specifier)) { 96 found = 1; 97 *salttypep = salttype_table[i].stt_enctype; 98 break; 99 } 100 } 101 return((found) ? 0 : EINVAL); 102 } 103 104 /* 105 * Internal datatype to string routines. 106 * 107 * These routines return 0 for success, EINVAL for invalid parameter, ENOMEM 108 * if the supplied buffer/length will not contain the output. 109 */ 110 krb5_error_code KRB5_CALLCONV 111 krb5_salttype_to_string(krb5_int32 salttype, char *buffer, size_t buflen) 112 { 113 int i; 114 const char *out; 115 116 out = (char *) NULL; 117 for (i=0; i<salttype_table_nents; i++) { 118 if (salttype == salttype_table[i].stt_enctype) { 119 out = salttype_table[i].stt_output; 120 break; 121 } 122 } 123 if (out) { 124 if (buflen > strlen(out)) 125 strcpy(buffer, out); 126 else 127 out = (char *) NULL; 128 return((out) ? 0 : ENOMEM); 129 } 130 else 131 return(EINVAL); 132 } 133 134 /* (absolute) time conversions */ 135 136 #ifndef HAVE_STRFTIME 137 #undef strftime 138 #define strftime my_strftime 139 static size_t strftime (char *, size_t, const char *, const struct tm *); 140 #endif 141 142 #ifdef HAVE_STRPTIME 143 #ifdef NEED_STRPTIME_PROTO 144 extern char *strptime (const char *, const char *, 145 struct tm *) 146 #ifdef __cplusplus 147 throw() 148 #endif 149 ; 150 #endif 151 #else /* HAVE_STRPTIME */ 152 #undef strptime 153 #define strptime my_strptime 154 static char *strptime (const char *, const char *, struct tm *); 155 #endif 156 157 krb5_error_code KRB5_CALLCONV 158 krb5_string_to_timestamp(char *string, krb5_timestamp *timestampp) 159 { 160 int i; 161 struct tm timebuf; 162 time_t now, ret_time; 163 char *s; 164 static const char * const atime_format_table[] = { 165 "%Y%m%d%H%M%S", /* yyyymmddhhmmss */ 166 "%Y.%m.%d.%H.%M.%S", /* yyyy.mm.dd.hh.mm.ss */ 167 "%y%m%d%H%M%S", /* yymmddhhmmss */ 168 "%y.%m.%d.%H.%M.%S", /* yy.mm.dd.hh.mm.ss */ 169 "%y%m%d%H%M", /* yymmddhhmm */ 170 "%H%M%S", /* hhmmss */ 171 "%H%M", /* hhmm */ 172 "%T", /* hh:mm:ss */ 173 "%R", /* hh:mm */ 174 /* The following not really supported unless native strptime present */ 175 "%x:%X", /* locale-dependent short format */ 176 "%d-%b-%Y:%T", /* dd-month-yyyy:hh:mm:ss */ 177 "%d-%b-%Y:%R" /* dd-month-yyyy:hh:mm */ 178 }; 179 static const int atime_format_table_nents = 180 sizeof(atime_format_table)/sizeof(atime_format_table[0]); 181 182 183 now = time((time_t *) NULL); 184 for (i=0; i<atime_format_table_nents; i++) { 185 /* We reset every time throughout the loop as the manual page 186 * indicated that no guarantees are made as to preserving timebuf 187 * when parsing fails 188 */ 189 #ifdef HAVE_LOCALTIME_R 190 (void) localtime_r(&now, &timebuf); 191 #else 192 memcpy(&timebuf, localtime(&now), sizeof(timebuf)); 193 #endif 194 /*LINTED*/ 195 if ((s = strptime(string, atime_format_table[i], &timebuf)) 196 && (s != string)) { 197 /* See if at end of buffer - otherwise partial processing */ 198 while(*s != 0 && isspace((int) *s)) s++; 199 if (*s != 0) 200 continue; 201 if (timebuf.tm_year <= 0) 202 continue; /* clearly confused */ 203 ret_time = mktime(&timebuf); 204 if (ret_time == (time_t) -1) 205 continue; /* clearly confused */ 206 *timestampp = (krb5_timestamp) ret_time; 207 return 0; 208 } 209 } 210 return(EINVAL); 211 } 212 213 krb5_error_code KRB5_CALLCONV 214 krb5_timestamp_to_string(krb5_timestamp timestamp, char *buffer, size_t buflen) 215 { 216 int ret; 217 time_t timestamp2 = timestamp; 218 struct tm tmbuf; 219 const char *fmt = "%c"; /* This is to get around gcc -Wall warning that 220 the year returned might be two digits */ 221 222 #ifdef HAVE_LOCALTIME_R 223 (void) localtime_r(×tamp2, &tmbuf); 224 #else 225 memcpy(&tmbuf, localtime(×tamp2), sizeof(tmbuf)); 226 #endif 227 ret = strftime(buffer, buflen, fmt, &tmbuf); 228 if (ret == 0 || ret == buflen) 229 return(ENOMEM); 230 return(0); 231 } 232 233 krb5_error_code KRB5_CALLCONV 234 krb5_timestamp_to_sfstring(krb5_timestamp timestamp, char *buffer, size_t buflen, char *pad) 235 { 236 struct tm *tmp; 237 size_t i; 238 size_t ndone; 239 time_t timestamp2 = timestamp; 240 struct tm tmbuf; 241 242 static const char * const sftime_format_table[] = { 243 "%c", /* Default locale-dependent date and time */ 244 "%d %b %Y %T", /* dd mon yyyy hh:mm:ss */ 245 "%x %X", /* locale-dependent short format */ 246 "%d/%m/%Y %R" /* dd/mm/yyyy hh:mm */ 247 }; 248 static const int sftime_format_table_nents = 249 sizeof(sftime_format_table)/sizeof(sftime_format_table[0]); 250 251 #ifdef HAVE_LOCALTIME_R 252 tmp = localtime_r(×tamp2, &tmbuf); 253 #else 254 memcpy((tmp = &tmbuf), localtime(×tamp2), sizeof(tmbuf)); 255 #endif 256 ndone = 0; 257 for (i=0; i<sftime_format_table_nents; i++) { 258 if ((ndone = strftime(buffer, buflen, sftime_format_table[i], tmp))) 259 break; 260 } 261 if (!ndone) { 262 #define sftime_default_len 2+1+2+1+4+1+2+1+2+1 263 if (buflen >= sftime_default_len) { 264 sprintf(buffer, "%02d/%02d/%4d %02d:%02d", 265 tmp->tm_mday, tmp->tm_mon+1, 1900+tmp->tm_year, 266 tmp->tm_hour, tmp->tm_min); 267 ndone = strlen(buffer); 268 } 269 } 270 if (ndone && pad) { 271 for (i=ndone; i<buflen-1; i++) 272 buffer[i] = *pad; 273 buffer[buflen-1] = '\0'; 274 } 275 return((ndone) ? 0 : ENOMEM); 276 } 277 278 /* Solaris Kerberos */ 279 #ifdef SUNW_INC_DEAD_CODE 280 /* relative time (delta-t) conversions */ 281 282 /* string->deltat is in deltat.y */ 283 284 krb5_error_code KRB5_CALLCONV 285 krb5_deltat_to_string(krb5_deltat deltat, char *buffer, size_t buflen) 286 { 287 int days, hours, minutes, seconds; 288 krb5_deltat dt; 289 290 /* 291 * We want something like ceil(log10(2**(nbits-1))) + 1. That log 292 * value is log10(2)*(nbits-1) or log10(2**8)*(nbits-1)/8. So, 293 * 2.4... is log10(256), rounded up. Add one to handle leading 294 * minus, and one more to force int cast to round the value up. 295 * This doesn't include room for a trailing nul. 296 * 297 * This will break if bytes are more than 8 bits. 298 */ 299 #define MAX_CHARS_FOR_INT_TYPE(TYPE) ((int) (2 + 2.408241 * sizeof (TYPE))) 300 char tmpbuf[MAX_CHARS_FOR_INT_TYPE(int) * 4 + 8]; 301 302 days = (int) (deltat / (24*3600L)); 303 dt = deltat % (24*3600L); 304 hours = (int) (dt / 3600); 305 dt %= 3600; 306 minutes = (int) (dt / 60); 307 seconds = (int) (dt % 60); 308 309 memset (tmpbuf, 0, sizeof (tmpbuf)); 310 if (days == 0) 311 sprintf(buffer, "%d:%02d:%02d", hours, minutes, seconds); 312 else if (hours || minutes || seconds) 313 sprintf(buffer, "%d %s %02d:%02d:%02d", days, 314 (days > 1) ? "days" : "day", 315 hours, minutes, seconds); 316 else 317 sprintf(buffer, "%d %s", days, 318 (days > 1) ? "days" : "day"); 319 if (tmpbuf[sizeof(tmpbuf)-1] != 0) 320 /* Something must be very wrong with my math above, or the 321 assumptions going into it... */ 322 abort (); 323 if (strlen (tmpbuf) > buflen) 324 return ENOMEM; 325 else 326 strncpy (buffer, tmpbuf, buflen); 327 return 0; 328 } 329 #endif /* SUNW_INC_DEAD_CODE */ 330 331 #undef __P 332 #define __P(X) X 333 334 #if !defined (HAVE_STRFTIME) || !defined (HAVE_STRPTIME) 335 #undef _CurrentTimeLocale 336 #define _CurrentTimeLocale (&dummy_locale_info) 337 338 struct dummy_locale_info_t { 339 char d_t_fmt[15]; 340 char t_fmt_ampm[12]; 341 char t_fmt[9]; 342 char d_fmt[9]; 343 char day[7][10]; 344 char abday[7][4]; 345 char mon[12][10]; 346 char abmon[12][4]; 347 char am_pm[2][3]; 348 }; 349 static const struct dummy_locale_info_t dummy_locale_info = { 350 "%a %b %d %X %Y", /* %c */ 351 "%I:%M:%S %p", /* %r */ 352 "%H:%M:%S", /* %X */ 353 "%m/%d/%y", /* %x */ 354 { "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", 355 "Saturday" }, 356 { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" }, 357 { "January", "February", "March", "April", "May", "June", 358 "July", "August", "September", "October", "November", "December" }, 359 { "Jan", "Feb", "Mar", "Apr", "May", "Jun", 360 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" }, 361 { "AM", "PM" }, 362 }; 363 #undef TM_YEAR_BASE 364 #define TM_YEAR_BASE 1900 365 #endif 366 367 #ifndef HAVE_STRFTIME 368 #undef DAYSPERLYEAR 369 #define DAYSPERLYEAR 366 370 #undef DAYSPERNYEAR 371 #define DAYSPERNYEAR 365 372 #undef DAYSPERWEEK 373 #define DAYSPERWEEK 7 374 #undef isleap 375 #define isleap(N) ((N % 4) == 0 && (N % 100 != 0 || N % 400 == 0)) 376 #undef tzname 377 #define tzname my_tzname 378 static const char *const tzname[2] = { 0, 0 }; 379 #undef tzset 380 #define tzset() 381 382 #include "strftime.c" 383 #endif 384 385 #ifndef HAVE_STRPTIME 386 #include "strptime.c" 387 #endif 388