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Annotation of src/usr.bin/skey/skey.1, Revision 1.22

1.22    ! millert     1: .\" $OpenBSD: skey.1,v 1.21 2000/11/09 17:52:38 aaron Exp $
1.1       deraadt     2: .\"    @(#)skey.1      1.1     10/28/93
                      3: .\"
1.17      millert     4: .Dd October 28, 1993
1.1       deraadt     5: .Dt SKEY 1
1.6       michaels    6: .Os
1.1       deraadt     7: .Sh NAME
1.9       millert     8: .Nm skey, otp-md4, otp-md5, otp-sha1, otp-rmd160
1.13      aaron       9: .Nd respond to an OTP challenge
1.4       millert    10: .Sh SYNOPSIS
                     11: .Nm skey
                     12: .Op Fl x
1.16      aaron      13: .Oo
                     14: .Fl md4 | Fl md5 | Fl sha1 |
                     15: .Fl rmd160
                     16: .Oc
1.7       millert    17: .Op Fl n Ar count
1.4       millert    18: .Op Fl p Ar passwd
                     19: <sequence#>[/] key
1.1       deraadt    20: .Sh DESCRIPTION
1.22    ! millert    21: .Nm S/Key
1.12      aaron      22: is a procedure for using one-time passwords to authenticate access to
1.20      aaron      23: computer systems.
                     24: It uses 64 bits of information transformed by the
                     25: MD4, MD5, SHA1, or RIPEMD-160 algorithms.
                     26: The user supplies the 64 bits
1.17      millert    27: in the form of 6 English words that are generated by a secure computer.
                     28: This implementation of
1.22    ! millert    29: .Nm S/Key
        !            30: is RFC 2289 compliant.
1.5       millert    31: .Pp
                     32: When
                     33: .Nm skey
1.15      aaron      34: is invoked as
1.5       millert    35: .Nm otp-method ,
                     36: .Nm skey
                     37: will use
                     38: .Ar method
                     39: as the hash function where
                     40: .Ar method
1.9       millert    41: is currently one of md4, md5, sha1, or rmd160.
1.5       millert    42: .Pp
                     43: If you misspell your password while running
                     44: .Nm skey ,
                     45: you will get a list of passwords
1.18      millert    46: that will not work, and no indication of the problem.
1.3       millert    47: .Pp
1.18      millert    48: Password sequence numbers count backwards.
1.5       millert    49: You can enter the passwords using small letters, even though
                     50: .Nm skey
                     51: prints them capitalized.
1.19      aaron      52: .Pp
                     53: The options are as follows:
1.21      aaron      54: .Bl -tag -width Ds
1.3       millert    55: .It Fl n Ar count
                     56: Prints out
                     57: .Ar count
1.19      aaron      58: one-time passwords.
                     59: The default is to print one.
1.3       millert    60: .It Fl p Ar password
                     61: Uses
                     62: .Ar password
1.19      aaron      63: as the secret password.
                     64: Use of this option is discouraged as
1.3       millert    65: your secret password could be visible in a process listing.
1.4       millert    66: .It Fl x
1.12      aaron      67: Causes output to be in hexadecimal instead of ASCII.
1.4       millert    68: .It Fl md4
                     69: Selects MD4 as the hash algorithm.
                     70: .It Fl md5
                     71: Selects MD5 as the hash algorithm.
                     72: .It Fl sha1
1.9       millert    73: Selects SHA-1 (NIST Secure Hash Algorithm Revision 1) as the hash algorithm.
                     74: .It Fl rmd160
                     75: Selects RMD-160 (160 bit Ripe Message Digest) as the hash algorithm.
1.3       millert    76: .El
1.19      aaron      77: .Sh EXAMPLES
1.5       millert    78: .sp 0
                     79:     % skey 99 th91334
                     80: .sp 0
                     81:     Enter secret password: <your secret password is entered here>
                     82: .sp 0
                     83:     OMEN US HORN OMIT BACK AHOY
                     84: .sp 0
1.15      aaron      85:     %
1.1       deraadt    86: .Sh SEE ALSO
1.14      alex       87: .Xr login 1 ,
1.12      aaron      88: .Xr skeyinfo 1 ,
1.14      alex       89: .Xr skeyinit 1
1.12      aaron      90: .Pp
1.22    ! millert    91: .Em RFC2289
1.11      deraadt    92: .Sh TRADEMARKS AND PATENTS
                     93: S/Key is a Trademark of Bellcore.
1.1       deraadt    94: .Sh AUTHORS
                     95: Phil Karn, Neil M. Haller, John S. Walden, Scott Chasin