141 lines
3.4 KiB
C
141 lines
3.4 KiB
C
/*
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* Copyright 1987, 1988 by the Massachusetts Institute of Technology.
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*
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* For copying and distribution information, please see the file
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* <mit-copyright.h>.
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*
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* Description
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*/
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#include "adm_locl.h"
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RCSID("$Id: ext_srvtab.c,v 1.17 1998/06/09 19:24:13 joda Exp $");
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static des_cblock master_key;
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static des_cblock session_key;
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static des_key_schedule master_key_schedule;
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static char realm[REALM_SZ];
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static void
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StampOutSecrets(void)
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{
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memset(master_key, 0, sizeof master_key);
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memset(session_key, 0, sizeof session_key);
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memset(master_key_schedule, 0, sizeof master_key_schedule);
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}
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static void
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usage(void)
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{
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fprintf(stderr,
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"Usage: %s [-n] [-r realm] instance [instance ...]\n",
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__progname);
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StampOutSecrets();
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exit(1);
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}
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static void
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FWrite(void *p, int size, int n, FILE *f)
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{
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if (fwrite(p, size, n, f) != n) {
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StampOutSecrets();
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errx(1, "Error writing output file. Terminating.\n");
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}
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}
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int
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main(int argc, char **argv)
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{
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FILE *fout;
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char fname[1024];
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int fopen_errs = 0;
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int arg;
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Principal princs[40];
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int more;
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int prompt = KDB_GET_PROMPT;
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int n, i;
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set_progname (argv[0]);
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memset(realm, 0, sizeof(realm));
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#ifdef HAVE_ATEXIT
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atexit(StampOutSecrets);
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#endif
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/* Parse commandline arguments */
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if (argc < 2)
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usage();
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else {
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for (i = 1; i < argc; i++) {
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if (strcmp(argv[i], "-n") == 0)
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prompt = FALSE;
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else if (strcmp(argv[i], "-r") == 0) {
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if (++i >= argc)
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usage();
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else {
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strcpy_truncate(realm, argv[i], REALM_SZ);
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/*
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* This is to humor the broken way commandline
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* argument parsing is done. Later, this
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* program ignores everything that starts with -.
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*/
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argv[i][0] = '-';
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}
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}
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else if (argv[i][0] == '-')
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usage();
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else
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if (!k_isinst(argv[i])) {
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warnx("bad instance name: %s", argv[i]);
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usage();
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}
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}
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}
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if (kdb_get_master_key (prompt, &master_key, master_key_schedule) != 0)
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errx (1, "Couldn't read master key.");
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if (kdb_verify_master_key (&master_key, master_key_schedule, stderr) < 0) {
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exit(1);
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}
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/* For each arg, search for instances of arg, and produce */
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/* srvtab file */
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if (!realm[0])
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if (krb_get_lrealm(realm, 1) != KSUCCESS) {
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StampOutSecrets();
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errx (1, "couldn't get local realm");
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}
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umask(077);
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for (arg = 1; arg < argc; arg++) {
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if (argv[arg][0] == '-')
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continue;
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snprintf(fname, sizeof(fname), "%s-new-srvtab", argv[arg]);
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if ((fout = fopen(fname, "w")) == NULL) {
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warn("Couldn't create file '%s'.", fname);
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fopen_errs++;
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continue;
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}
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printf("Generating '%s'....\n", fname);
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n = kerb_get_principal("*", argv[arg], &princs[0], 40, &more);
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if (more)
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fprintf(stderr, "More than 40 found...\n");
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for (i = 0; i < n; i++) {
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FWrite(princs[i].name, strlen(princs[i].name) + 1, 1, fout);
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FWrite(princs[i].instance, strlen(princs[i].instance) + 1,
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1, fout);
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FWrite(realm, strlen(realm) + 1, 1, fout);
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FWrite(&princs[i].key_version,
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sizeof(princs[i].key_version), 1, fout);
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copy_to_key(&princs[i].key_low, &princs[i].key_high, session_key);
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kdb_encrypt_key (&session_key, &session_key,
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&master_key, master_key_schedule, DES_DECRYPT);
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FWrite(session_key, sizeof session_key, 1, fout);
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}
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fclose(fout);
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}
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StampOutSecrets();
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return fopen_errs; /* 0 errors if successful */
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}
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