Add and install skey(3).
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gmcgarry
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201d66a064
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# $NetBSD: Makefile,v 1.4 1997/10/23 03:23:03 lukem Exp $
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# $NetBSD: Makefile,v 1.5 2001/11/10 06:11:10 gmcgarry Exp $
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LIB= skey
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SRCS= skeylogin.c skeysubr.c put.c
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INCS= skey.h
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INCSDIR=/usr/include
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MAN= skey.3
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MLINKS= skey.3 skeychallenge.3 \
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skey.3 skeylookup.3 \
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skey.3 skeygetnext.3 \
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skey.3 skeyverify.3 \
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skey.3 skeyzero.3 \
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skey.3 getskeyprompt.3 \
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skey.3 skey_set_algorithm.3 \
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skey.3 skey_get_algorithm.3 \
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skey.3 skey_haskey.3 \
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skey.3 skey_keyinfo.3 \
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skey.3 skey_passcheck.3 \
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skey.3 skey_authenticate.3
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.include <bsd.lib.mk>
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.\" $NetBSD: skey.3,v 1.1 2001/11/10 06:11:10 gmcgarry Exp $
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.\"
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.\" Copyright (c) 2001 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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.\"
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.\" This code is derived from software contributed to The NetBSD Foundation
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.\" by Gregory McGarry.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the NetBSD
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.\" Foundation, Inc. and its contributors.
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.\" 4. Neither the name of The NetBSD Foundation nor the names of its
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.\" contributors may be used to endorse or promote products derived
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.\" from this software without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd November 10, 2001
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.Dt SKEY 3
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.Os
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.Sh NAME
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.Nm skey ,
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.Nm skeychallenge ,
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.Nm skeylookup ,
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.Nm skeygetnext ,
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.Nm skeyverify ,
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.Nm skeyzero ,
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.Nm getskeyprompt ,
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.Nm skey_set_algorithm ,
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.Nm skey_get_algorithm ,
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.Nm skey_haskey ,
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.Nm skey_keyinfo ,
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.Nm skey_passcheck ,
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.Nm skey_authenticate
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.Nd one-time password (OTP) library
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.Sh LIBRARY
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S/key One-Time Password Library (libskey, -lskey)
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.Sh SYNOPSIS
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.Fd #include <skey.h>
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.Ft int
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.Fn skeychallenge "struct skey *mp" "const char *name" "char *ss" \
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"size_t sslen"
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.Ft int
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.Fn skeylookup "struct skey *mp" "const char *name"
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.Ft int
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.Fn skeygetnext "struct skey *mp"
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.Ft int
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.Fn skeyverify "struct skey *mp" "char *response"
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.Ft int
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.Fn skeyzero "struct skey *mp" "char *response"
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.Ft int
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.Fn getskeyprompt "struct skey *mp" "char *name" "char *prompt"
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.Ft const char *
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.Fn skey_set_algorithm "const char *new"
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.Ft const char *
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.Fn skey_get_algorithm "void"
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.Ft int
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.Fn skey_haskey "const char *username"
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.Ft const char *
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.Fn skey_keyinfo "const char *username"
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.Ft int
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.Fn skey_passcheck "const char *username" "char *passwd"
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.Ft int
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.Fn skey_authenticate "const char *username"
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.Ft void
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.Fn f "char *x"
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.Ft int
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.Fn keycrunch "char *result" "const char *seed" "const char *passwd"
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.Ft void
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.Fn rip "char *buf"
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.Ft char *
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.Fn readpass "char *buf " "int n"
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.Ft char *
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.Fn readskey "char *buf" "int n"
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.Ft int
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.Fn atob8 "char *out" "const char *in"
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.Ft int
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.Fn btoa8 "char *out" "const char *in"
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.Ft int
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.Fn htoi "int c"
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.Ft const char *
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.Fn skipspace "const char *cp"
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.Ft void
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.Fn backspace "char *buf"
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.Ft void
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.Fn sevenbit "char *buf"
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.Ft char *
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.Fn btoe "char *engout" "const char *c"
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.Ft int
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.Fn etob "char *out" "const char *e"
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.Ft char *
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.Fn put8 "char *out" "const char *s"
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.Sh DESCRIPTION
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The
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.Nm
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library provides routines for accessing
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.Nx Ns 's
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one-time password (OTP) authentication system.
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.Pp
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Most S/Key operations take a pointer to a
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.Em struct skey ,
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which should be considered as an opaque identifier.
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.Sh FUNCTIONS
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The following high-level functions are available:
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.Bl -tag -width compact
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.It Fn skeychallenge "mp" "name" "ss" "sslen"
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Return a S/Key challenge for user
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.Fa name .
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If successful, the caller's skey structure
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.Fa mp
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is filled and 0 is returned. If unsuccessful (eg if name in unknown),
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-1 is returned.
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.It Fn skeylookup "mp" "name"
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Find an entry for user
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.Fa name
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in the one-time password database. Returns 0 if the entry is found
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and 1 if the entry is not found. If an error occurs accessing the
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database, -1 is returned.
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.It Fn skeygetnext "mp"
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Get the next entry in the one-time password database. Returns 0 on
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success and the entry is stored in
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.Ar mp
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and 1 if no more entries are available. If an error occurs accessing
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the database, -1 is returned.
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.It Fn skeyverify "mp" "response"
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Verify response
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.Fa response
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to a S/Key challenge. Returns 0 if the verification is successful and
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1 if the verification failed. If an error occurs accessing the
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database, -1 is returned.
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.It Fn skeyzero "mp" "response"
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Comment out user's entry in the S/Key database. Returns 0 on success
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and the database is updated, otherwise -1 is returned and the database
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remains unchanged.
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.It Fn getskeyprompt "mp" "name" "prompt"
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Issue a S/Key challenge for user
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.Ar name .
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If successful, fill in the caller's skey structure
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.Fa mp
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and return 0. If unsuccessful (eg if name in unknown) -1 is returned.
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.El
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.Pp
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The following lower-level functions are available:
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.Bl -tag -width compact
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.It Fn skey_set_algorithm "new"
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Set hash algorithm type. Valid values for
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.Fa new
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are "md4", "md5" and "sha1".
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.It Fn skey_get_algorithm "void"
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Get current hash type.
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.It Fn skey_haskey "username"
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Returns 0 if the user
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.Fa username
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exists and 1 if the user doesn't exist. Returns -1 on file error.
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.It Fn skey_keyinfo "username"
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Returns the current sequence number and seed for user
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.Ar username .
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.It Fn skey_passcheck "username" "passwd"
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Check to see if answer is the correct one to the current challenge.
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.It Fn skey_authenticate "username"
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Used when calling program will allow input of the user's repsonse to
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the challenge. Returns zero on success or -1 on failure.
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.El
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.Pp
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The following miscellaneous functions are available:
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.Bl -tag -width compact
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.It Fn f "x"
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One-way function to take 8 bytes pointed to by
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.Fa x
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and return 8 bytes in place.
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.It Fn keycrunch "char *result" "const char *seed" "const char *passwd"
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Crunch a key.
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.It Fn rip "buf"
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Strip trailing CR/LF characters from a line of text
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.Fa buf .
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.It Fn readpass "buf" "n"
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Read in secret passwd (turns off echo).
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.It Fn readskey "buf" "n"
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Read in an s/key OTP (does not turn off echo).
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.It Fn atob8 "out" "in"
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Convert 8-byte hex-ascii string
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.Fa in
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to binary array
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.Fa out .
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Returns 0 on success, -1 on error.
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.It Fn btoa8 "out" "in"
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Convert 8-bte binary array
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.Fa in
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to hex-ascii string
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.Fa out .
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Returns 0 on success, -1 on error.
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.It Fn htoi "int c"
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Convert hex digit to binary integer.
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.It Fn skipspace "cp"
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Skip leading spaces from the string
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.Fa cp .
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.It Fn backspace "buf"
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Remove backspaced over characters from the string
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.Fa buf .
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.It Fn sevenbit "buf"
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Ensure line
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.Fa buf
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is all seven bits.
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.It Fn btoe "engout" "c"
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Encode 8 bytes in
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.Ar c
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as a string of English words. Returns a pointer to a static buffer in
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.Fa engout .
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.It Fn etob "out" "e"
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Convert English to binary. Returns 0 if the word is not in the
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database, 1 if all good words and parity is valid, -1 if badly formed
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in put (ie > 4 char word) and -2 if words are valid but parity is
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wrong.
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.It Fn put8 "out" "s"
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Display 8 bytes
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.Fa s
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as a series of 16-bit hex digits.
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.El
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.Sh FILES
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.Bl -tag -width /usr/lib/libskey_p.a -compact
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.It Pa /usr/lib/libskey.a
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the static skey library
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.It Pa /usr/lib/libskey.so
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the dynamic skey library
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.It Pa /usr/lib/libskey_p.a
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the static skey library compiled for profiling
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.El
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.Sh SEE ALSO
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.Xr skey 1 ,
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.Xr skeyinfo 1 ,
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.Xr skeyaudit 1
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.Sh BUGS
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The
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.Nm
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library functions are not re-entrant or thread-safe.
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.Pp
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The
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.Nm
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library defines many poorly named functions which pollute the name
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space.
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