75 lines
2.3 KiB
C
75 lines
2.3 KiB
C
/* challenge.c: The opiechallenge() library function.
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%%% portions-copyright-cmetz
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Portions of this software are Copyright 1996 by Craig Metz, All Rights
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Reserved. The Inner Net License Version 2 applies to these portions of
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the 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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Portions of this software are Copyright 1995 by Randall Atkinson and Dan
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McDonald, All Rights Reserved. All Rights under this copyright are assigned
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to the U.S. Naval Research Laboratory (NRL). The NRL Copyright Notice and
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License Agreement applies to this software.
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History:
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Modified by cmetz for OPIE 2.3. Use opie_ prefix. Send debug info to
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syslog. Add sha plumbing.
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Modified by cmetz for OPIE 2.2. Use FUNCTION declaration et al.
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Created at NRL for OPIE 2.2 from opiesubr2.c
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*/
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#include "opie_cfg.h"
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#include <stdio.h>
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#include <string.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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/* Return an OTP challenge string for user 'name'.
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The return values are:
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0 = All good
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-1 = Low-level error (file, memory, I/O, etc.)
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1 = High-level error (user not found or locked)
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This function MUST eventually be followed by an opieverify() to release
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the user lock and file handles.
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This function will give you a blanked-out state block if it returns a
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nonzero status. Even though it returns a non-zero status and a blank
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state block, you still MUST call opieverify() to clear the lock and
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any internal state (the latter condition is not actually used yet).
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*/
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static char *algids[] = { NULL, NULL, NULL, "sha1", "md4", "md5" };
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int opiechallenge FUNCTION((mp, name, ss), struct opie *mp AND char *name AND char *ss)
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{
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int rval = -1;
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memset(mp, 0, sizeof(*mp));
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rval = opielookup(mp, name);
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#if DEBUG
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if (rval) syslog(LOG_DEBUG, "opiechallenge: opielookup(mp, name=%s) returned %d", name, rval);
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#endif /* DEBUG */
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if (!rval) {
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rval = opielock(name);
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#if DEBUG
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if (rval) syslog(LOG_DEBUG, "opiechallenge: opielock(name=%s) returned %d", name, rval);
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#endif /* DEBUG */
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}
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if (rval) {
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opierandomchallenge(ss);
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memset(mp, 0, sizeof(*mp));
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} else
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sprintf(ss, "otp-%s %d %s", algids[MDX], mp->opie_n - 1, mp->opie_seed);
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return rval;
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}
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