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/* readrec.c: The __opiereadrec() library function.
%%% copyright-cmetz-96
This software is Copyright 1996-2001 by Craig Metz, All Rights Reserved.
The Inner Net License Version 3 applies to this software.
You should have received a copy of the license with this software. If
you didn't get a copy, you may request one from <license@inner.net>.
History:
Modified by cmetz for OPIE 2.4. Check that seed, sequence number, and
response values are valid.
Modified by cmetz for OPIE 2.31. Removed active attack protection
support. Fixed a debug message typo. Keep going after bogus
records. Set read flag.
Created by cmetz for OPIE 2.3.
$FreeBSD$
*/
#include "opie_cfg.h"
#include <stdio.h>
#include <sys/types.h>
#include <errno.h>
#if HAVE_UNISTD_H
#include <unistd.h>
#endif /* HAVE_UNISTD_H */
#if HAVE_STRING_H
#include <string.h>
#endif /* HAVE_STRING_H */
#if HAVE_STDLIB_H
#include <stdlib.h>
#endif /* HAVE_STDLIB_H */
#if HAVE_FCNTL_H
#include <fcntl.h>
#endif /* HAVE_FCNTL_H */
#include <ctype.h>
#include <errno.h>
#if DEBUG
#include <syslog.h>
#endif /* DEBUG */
#include "opie.h"
static int parserec FUNCTION((opie), struct opie *opie)
{
char *c, *c2;
if (!(c2 = strchr(opie->opie_principal = opie->opie_buf, ' ')))
return -1;
while(*c2 == ' ') c2++;
*(c2 - 1) = 0;
if (!(c2 = strchr(c = c2, ' ')))
return -1;
*(c2++) = 0;
{
char *c3;
opie->opie_n = strtoul(c, &c3, 10);
if (*c3 || (opie->opie_n <= 0) || (opie->opie_n > 9999))
return -1;
};
if (!(c2 = strchr(opie->opie_seed = c2, ' ')))
return -1;
*(c2++) = 0;
for (c = opie->opie_seed; *c; c++)
if (!isalnum(*c))
return -1;
while(*c2 == ' ') c2++;
if (!(c2 = strchr(opie->opie_val = c2, ' ')))
return -1;
*(c2++) = 0;
{
struct opie_otpkey otpkey;
if (!opieatob8(&otpkey, opie->opie_val))
return -1;
}
return 0;
}
int __opiereadrec FUNCTION((opie), struct opie *opie)
{
FILE *f = NULL;
int rval = -1;
if (!(f = __opieopen(KEY_FILE, 0, 0600))) {
#if DEBUG
syslog(LOG_DEBUG, "__opiereadrec: __opieopen(KEY_FILE..) failed!");
#endif /* DEBUG */
goto ret;
}
{
int i;
if ((i = open(KEY_FILE, O_RDWR)) < 0) {
opie->opie_flags &= ~__OPIE_FLAGS_RW;
#if DEBUG
syslog(LOG_DEBUG, "__opiereadrec: open(KEY_FILE, O_RDWR) failed: %s", strerror(errno));
#endif /* DEBUG */
} else {
close(i);
opie->opie_flags |= __OPIE_FLAGS_RW;
}
}
if (opie->opie_buf[0]) {
if (fseek(f, opie->opie_recstart, SEEK_SET))
goto ret;
if (fgets(opie->opie_buf, sizeof(opie->opie_buf), f))
goto ret;
if (parserec(opie))
goto ret;
opie->opie_flags |= __OPIE_FLAGS_READ;
rval = 0;
goto ret;
}
if (!opie->opie_principal)
goto ret;
{
char *c, principal[OPIE_PRINCIPAL_MAX];
int i;
if (c = strchr(opie->opie_principal, ':'))
*c = 0;
strlcpy(principal, opie->opie_principal, sizeof(principal));
do {
if ((opie->opie_recstart = ftell(f)) < 0)
goto ret;
if (!fgets(opie->opie_buf, sizeof(opie->opie_buf), f)) {
rval = 1;
goto ret;
}
if (parserec(opie))
continue;
} while (strcmp(principal, opie->opie_principal));
rval = 0;
}
ret:
if (f)
fclose(f);
return rval;
}
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