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168 lines
3.3 KiB
C
168 lines
3.3 KiB
C
/* readrec.c: The __opiereadrec() library function.
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%%% copyright-cmetz-96
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This software is Copyright 1996-2001 by Craig Metz, All Rights Reserved.
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The Inner Net License Version 3 applies to this software.
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You should have received a copy of the license with this software. If
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you didn't get a copy, you may request one from <license@inner.net>.
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History:
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Modified by cmetz for OPIE 2.4. Check that seed, sequence number, and
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response values are valid.
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Modified by cmetz for OPIE 2.31. Removed active attack protection
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support. Fixed a debug message typo. Keep going after bogus
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records. Set read flag.
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Created by cmetz for OPIE 2.3.
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*/
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#include "opie_cfg.h"
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#include <stdio.h>
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#include <sys/types.h>
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#include <errno.h>
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#if HAVE_UNISTD_H
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#include <unistd.h>
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#endif /* HAVE_UNISTD_H */
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#if HAVE_STRING_H
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#include <string.h>
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#endif /* HAVE_STRING_H */
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#if HAVE_STDLIB_H
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#include <stdlib.h>
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#endif /* HAVE_STDLIB_H */
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#if HAVE_FCNTL_H
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#include <fcntl.h>
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#endif /* HAVE_FCNTL_H */
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#include <ctype.h>
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#include <errno.h>
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#if DEBUG
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#include <syslog.h>
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#endif /* DEBUG */
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#include "opie.h"
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static int parserec FUNCTION((opie), struct opie *opie)
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{
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char *c, *c2;
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if (!(c2 = strchr(opie->opie_principal = opie->opie_buf, ' ')))
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return -1;
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while(*c2 == ' ') c2++;
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*(c2 - 1) = 0;
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if (!(c2 = strchr(c = c2, ' ')))
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return -1;
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*(c2++) = 0;
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{
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char *c3;
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opie->opie_n = strtoul(c, &c3, 10);
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if (*c3 || (opie->opie_n <= 0) || (opie->opie_n > 9999))
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return -1;
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};
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if (!(c2 = strchr(opie->opie_seed = c2, ' ')))
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return -1;
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*(c2++) = 0;
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for (c = opie->opie_seed; *c; c++)
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if (!isalnum(*c))
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return -1;
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while(*c2 == ' ') c2++;
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if (!(c2 = strchr(opie->opie_val = c2, ' ')))
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return -1;
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*(c2++) = 0;
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{
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struct opie_otpkey otpkey;
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if (!opieatob8(&otpkey, opie->opie_val))
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return -1;
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}
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return 0;
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}
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int __opiereadrec FUNCTION((opie), struct opie *opie)
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{
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FILE *f = NULL;
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int rval = -1;
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if (!(f = __opieopen(KEY_FILE, 0, 0644))) {
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#if DEBUG
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syslog(LOG_DEBUG, "__opiereadrec: __opieopen(KEY_FILE..) failed!");
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#endif /* DEBUG */
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goto ret;
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}
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{
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int i;
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if ((i = open(KEY_FILE, O_RDWR)) < 0) {
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opie->opie_flags &= ~__OPIE_FLAGS_RW;
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#if DEBUG
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syslog(LOG_DEBUG, "__opiereadrec: open(KEY_FILE, O_RDWR) failed: %s", strerror(errno));
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#endif /* DEBUG */
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} else {
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close(i);
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opie->opie_flags |= __OPIE_FLAGS_RW;
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}
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}
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if (opie->opie_buf[0]) {
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if (fseek(f, opie->opie_recstart, SEEK_SET))
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goto ret;
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if (fgets(opie->opie_buf, sizeof(opie->opie_buf), f))
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goto ret;
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if (parserec(opie))
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goto ret;
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opie->opie_flags |= __OPIE_FLAGS_READ;
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rval = 0;
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goto ret;
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}
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if (!opie->opie_principal)
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goto ret;
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{
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char *c, principal[OPIE_PRINCIPAL_MAX];
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int i;
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if (c = strchr(opie->opie_principal, ':'))
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*c = 0;
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if (strlen(opie->opie_principal) > OPIE_PRINCIPAL_MAX)
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(opie->opie_principal)[OPIE_PRINCIPAL_MAX] = 0;
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strcpy(principal, opie->opie_principal);
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do {
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if ((opie->opie_recstart = ftell(f)) < 0)
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goto ret;
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if (!fgets(opie->opie_buf, sizeof(opie->opie_buf), f)) {
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rval = 1;
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goto ret;
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}
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if (parserec(opie))
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continue;
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} while (strcmp(principal, opie->opie_principal));
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rval = 0;
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}
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ret:
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if (f)
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fclose(f);
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return rval;
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}
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