src/log/unlog.c

   1 /*
   2  * Copyright 2000, International Business Machines Corporation and others.
   3  * All Rights Reserved.
   4  *
   5  * This software has been released under the terms of the IBM Public
   6  * License.  For details, see the LICENSE file in the top-level source
   7  * directory or online at http://www.openafs.org/dl/license10.html
   8  */
   9
  10 /*
  11         unlog -- Tell the Andrew Cache Manager to either clean up your connection completely
  12                     or eliminate the caller's PAG.
  13         February 1986
  14
  15        Usage:
  16               unlog [cell ...]
  17
  18               where:
  19                   cell is the name the pertinent cell.
  20
  21         If no cell is provided, unlog destroys all tokens.
  22
  23         If a cell, for which a token is not held, is provided it is ignored.
  24 */
  25
  26 #define VIRTUE      1
  27 #define VICE        1
  28
  29 #include <afsconfig.h>
  30 #include <afs/param.h>
  31
  32 #include <roken.h>
  33 #include <afs/opr.h>
  34
  35 #include <afs/vice.h>
  36
  37 #include <afs/auth.h>
  38 #include <afs/cellconfig.h>
  39 #include <afs/afsutil.h>
  40 #include <afs/cmd.h>
  41
  42 #undef VIRTUE
  43 #undef VICE
  44
  45
  46 struct tokenInfo {
  47     struct ktc_token token;
  48     struct ktc_principal service;
  49     struct ktc_principal client;
  50     int deleted;
  51 };
  52
  53 static int unlog_ForgetCertainTokens(char **, int);
  54 static int unlog_NormalizeCellNames(char **, int);
  55 static int unlog_CheckUnlogList(char **, int, struct ktc_principal *);
  56 static int unlog_VerifyUnlog(char **, int, struct tokenInfo *, int);
  57
  58 static int
  59 CommandProc(struct cmd_syndesc *as, void *arock)
  60 {
  61 #define MAXCELLS 20             /* XXX */
  62     struct cmd_item *itp;
  63     afs_int32 code, i = 0;
  64     char *cells[20];
  65
  66     if (as->parms[0].items) {   /* A cell is provided */
  67         for (itp = as->parms[0].items; itp; itp = itp->next) {
  68             if (i >= MAXCELLS) {
  69                 printf
  70                     ("The maximum number of cells (%d) is exceeded; the rest are ignored\n",
  71                      MAXCELLS);
  72                 break;
  73             }
  74             cells[i++] = itp->data;
  75         }
  76         code = unlog_ForgetCertainTokens(cells, i);
  77     } else
  78         code = ktc_ForgetAllTokens();
  79     if (code) {
  80         printf("unlog: could not discard tickets, code %d\n", code);
  81         exit(1);
  82     }
  83     return 0;
  84 }
  85
  86
  87 #include "AFS_component_version_number.c"
  88
  89 int
  90 main(int argc, char *argv[])
  91 {                               /*Main routine */
  92     struct cmd_syndesc *ts;
  93     afs_int32 code;
  94
  95 #ifdef  AFS_AIX32_ENV
  96     /*
  97      * The following signal action for AIX is necessary so that in case of a
  98      * crash (i.e. core is generated) we can include the user's data section
  99      * in the core dump. Unfortunately, by default, only a partial core is
 100      * generated which, in many cases, isn't too useful.
 101      */
 102     struct sigaction nsa;
 103
 104     sigemptyset(&nsa.sa_mask);
 105     nsa.sa_handler = SIG_DFL;
 106     nsa.sa_flags = SA_FULLDUMP;
 107     sigaction(SIGSEGV, &nsa, NULL);
 108 #endif
 109
 110     ts = cmd_CreateSyntax(NULL, CommandProc, NULL, 0,
 111                           "Release Kerberos authentication");
 112     cmd_AddParm(ts, "-cell", CMD_LIST, CMD_OPTIONAL, "cell name");
 113
 114     code = cmd_Dispatch(argc, argv);
 115     exit(code != 0);
 116 }                               /*Main routine */
 117
 118
 119 /*
 120  * Problem: only the KTC gives you the ability to selectively destroy
 121  *          a specified token.
 122  *
 123  * Solution: Build a list of tokens, delete the bad ones (the ones to
 124  *           remove from the permissions list,) destroy all tokens, and
 125  *           then re-register the good ones.  Ugly, but it works.
 126  */
 127
 128 static int
 129 unlog_ForgetCertainTokens(char **list, int listSize)
 130 {
 131     int index, index2;
 132     int count;
 133     afs_int32 code;
 134     struct ktc_principal serviceName;
 135     struct tokenInfo *tokenInfoP;
 136
 137     /* normalize all the names in the list */
 138     unlog_NormalizeCellNames(list, listSize);
 139
 140     /* figure out how many tokens exist */
 141     count = 0;
 142     do {
 143         code = ktc_ListTokens(count, &count, &serviceName);
 144     } while (!code);
 145
 146     tokenInfoP = malloc((sizeof(struct tokenInfo) * count));
 147     if (!tokenInfoP) {
 148         perror("unlog_ForgetCertainTokens -- osi_Alloc failed");
 149         exit(1);
 150     }
 151
 152     for (code = index = index2 = 0; (!code) && (index < count); index++) {
 153         code =
 154             ktc_ListTokens(index2, &index2, &(tokenInfoP + index)->service);
 155
 156         if (!code) {
 157             code =
 158                 ktc_GetToken(&(tokenInfoP + index)->service,
 159                              &(tokenInfoP + index)->token,
 160                              sizeof(struct ktc_token),
 161                              &(tokenInfoP + index)->client);
 162
 163             if (!code)
 164                 (tokenInfoP + index)->deleted =
 165                     unlog_CheckUnlogList(list, listSize,
 166                                          &(tokenInfoP + index)->client);
 167         }
 168     }
 169
 170     unlog_VerifyUnlog(list, listSize, tokenInfoP, count);
 171     code = ktc_ForgetAllTokens();
 172
 173     if (code) {
 174         printf("unlog: could not discard tickets, code %d\n", code);
 175         exit(1);
 176     }
 177
 178     for (code = index = 0; index < count; index++) {
 179         if (!((tokenInfoP + index)->deleted)) {
 180             code =
 181                 ktc_SetToken(&(tokenInfoP + index)->service,
 182                              &(tokenInfoP + index)->token,
 183                              &(tokenInfoP + index)->client, 0);
 184             if (code) {
 185                 fprintf(stderr, "Couldn't re-register token, code = %d\n",
 186                         code);
 187             }
 188         }
 189     }
 190     return 0;
 191 }
 192
 193 /*
 194  * 0 if not in list, 1 if in list
 195  */
 196 int
 197 unlog_CheckUnlogList(char **list, int count, struct ktc_principal *principal)
 198 {
 199     do {
 200         if (strcmp(*list, principal->cell) == 0)
 201             return 1;
 202         list++;
 203         --count;
 204     } while (count);
 205
 206     return 0;
 207 }
 208
 209 /*
 210  * Caveat: this routine does NOT free up the memory passed (and replaced).
 211  *         because it assumes it isn't a problem.
 212  */
 213
 214 int
 215 unlog_NormalizeCellNames(char **list, int size)
 216 {
 217     char *newCellName;
 218     unsigned index;
 219     struct afsconf_dir *conf;
 220     int code;
 221     struct afsconf_cell cellinfo;
 222
 223     if (!(conf = afsconf_Open(AFSDIR_CLIENT_ETC_DIRPATH))) {
 224         fprintf(stderr, "Cannot get cell configuration info!\n");
 225         exit(1);
 226     }
 227
 228     for (index = 0; index < size; index++, list++) {
 229         newCellName = malloc(MAXKTCREALMLEN);
 230         if (!newCellName) {
 231             perror("unlog_NormalizeCellNames --- malloc failed");
 232             exit(1);
 233         }
 234
 235         lcstring(newCellName, *list, MAXKTCREALMLEN);
 236         code = afsconf_GetCellInfo(conf, newCellName, 0, &cellinfo);
 237         if (code) {
 238             if (code == AFSCONF_NOTFOUND) {
 239                 fprintf(stderr, "Unrecognized cell name %s\n", newCellName);
 240             } else {
 241                 fprintf(stderr,
 242                         "unlog_NormalizeCellNames - afsconf_GetCellInfo");
 243                 fprintf(stderr, " failed, code = %d\n", code);
 244             }
 245             exit(1);
 246         }
 247
 248
 249         strcpy(newCellName, cellinfo.name);
 250
 251         *list = newCellName;
 252     }
 253     afsconf_Close(conf);
 254     return 0;
 255 }
 256
 257 /*
 258  * check given list to assure tokens were held for specified cells
 259  * prints warning messages for those cells without such entries.
 260  */
 261 int
 262 unlog_VerifyUnlog(char **cellList, int cellListSize, struct tokenInfo *tokenList, int tokenListSize)
 263 {
 264     int index;
 265
 266     for (index = 0; index < cellListSize; index++) {
 267         int index2;
 268         int found;
 269
 270         for (found = index2 = 0; !found && index2 < tokenListSize; index2++)
 271             found =
 272                 strcmp(cellList[index],
 273                        (tokenList + index2)->client.cell) == 0;
 274
 275         if (!found)
 276             fprintf(stderr, "unlog: Warning - no tokens held for cell %s\n",
 277                     cellList[index]);
 278     }
 279     return 0;
 280 }