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Annotation of src/usr.bin/x99token/x99token.1, Revision 1.6

1.6     ! jmc         1: .\" $OpenBSD: x99token.1,v 1.5 2003/01/16 18:28:10 millert Exp $
        !             2: .\"
        !             3: .\" X9.9 calculator
        !             4: .\" This software is provided AS IS with no express or implied warranty
        !             5: .\" October 1995, Paul Borman <prb@krystal.com>
        !             6: .\"
        !             7: .\" Donated to the Public Domain by Paul Borman
1.2       millert     8: .\"
                      9: .Dd August 1, 2001
                     10: .Dt X99TOKEN 1
                     11: .Os
                     12: .Sh NAME
                     13: .Nm x99token
                     14: .Nd X9.9 software token calculator
                     15: .Sh SYNOPSIS
                     16: .Nm x99token
                     17: .Op Fl d
                     18: .Op Fl i
                     19: .Op Fl k Ar keyfile
                     20: .Op Fl n Ar count
                     21: .Sh DESCRIPTION
1.1       millert    22: The
1.2       millert    23: .Nm x99token
1.1       millert    24: program is a simple X9.9 software token calculator.
                     25: The token is initialized by using the
1.2       millert    26: .Fl i
1.1       millert    27: option.
                     28: In this mode,
1.2       millert    29: .Nm
                     30: requests a key.
                     31: The key consists of 8 bytes encoded in either hex or octal.
                     32: When encoded in hex the key must consist of 16 hex digits,
1.1       millert    33: no spaces (e.g., "0123456789abcdef").
1.5       millert    34: When encoded in octal the key must consist of 8 3-digit octets,
1.2       millert    35: each separated by exactly one space
1.1       millert    36: (e.g., "001 010 100 002 020 200 003 030").
1.2       millert    37: Once the key is entered, a PIN number is requested.
                     38: The PIN number is used to perturb the key before it is stored in a keyfile.
                     39: This perturbation is not terribly secure.
                     40: You should assume that anyone with access to your
1.1       millert    41: keyfile will also have access to your key.
1.2       millert    42: .Pp
1.1       millert    43: When
1.2       millert    44: .Fl i
1.1       millert    45: is not specified,
1.2       millert    46: .Nm
1.1       millert    47: is in calculator mode.
1.2       millert    48: In this mode you must enter the same PIN as used in the initialization step.
1.5       millert    49: The PIN is used to decode the key read from the keyfile.
1.2       millert    50: Next you enter the challenge you have been presented with.
1.1       millert    51: The
1.2       millert    52: .Nm
1.5       millert    53: program will provide you with a response to the challenge.
1.2       millert    54: If the
                     55: .Fl d
1.1       millert    56: option is used, the response will fold any hex digits to decimal.
                     57: If a
1.2       millert    58: .Ar count
1.1       millert    59: is specified by
1.2       millert    60: .Fl n ,
                     61: it indicates the number of challenges to predict.
                     62: The first challenge is always the entered challenge.
                     63: By default the value of
                     64: .Ar count
1.1       millert    65: is 1, which implies only the entered challenge is resolved.
1.2       millert    66: .Pp
1.1       millert    67: Future challenges are predicted by the following algorithm:
1.2       millert    68: .Bl -bullet -offset indent
                     69: .It
                     70: Encrypt the current challenge with the shared secret key
                     71: .It
                     72: AND each byte of the response with 0x0f
                     73: .It
                     74: Modulo each byte by 10 (0x0a)
                     75: .It
                     76: ADD 0x30 (ASCII value of '0') to each byte
                     77: .El
                     78: .Pp
1.1       millert    79: The resulting 8 bytes are all ASCII decimal digits and are the
                     80: predicted challenge.  This process may be repeated.
1.2       millert    81: .Sh FILES
                     82: .Bl -tag -width $HOME/.keyfile.des -compact
                     83: .It Pa $HOME/.keyfile.des
                     84: default keyfile
                     85: .El
1.3       millert    86: .Sh SEE ALSO
                     87: .Xr tokenadm 8 ,
                     88: .Xr tokeninit 8
                     89: .Sh AUTHORS
                     90: Paul Borman <prb@krystal.com>
                     91: .Sh CAVEATS
1.5       millert    92: This is a very simple-minded program.
1.4       espie      93: The keyfile should be placed on a floppy disk which is kept physically secure.
1.2       millert    94: .Pp
1.4       espie      95: Having not read the X9.9 standard, this may not be a complete or accurate
                     96: implementation of the standard.
                     97: This software is provided AS IS
1.1       millert    98: with no express or implied warranty.