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Annotation of src/usr.bin/x99token/x99token.1, Revision 1.3

1.3     ! millert     1: .\" $OpenBSD: x99token.1,v 1.2 2001/08/01 21:36:19 millert Exp $
1.2       millert     2: .\"
                      3: .Dd August 1, 2001
                      4: .Dt X99TOKEN 1
                      5: .Os
                      6: .Sh NAME
                      7: .Nm x99token
                      8: .Nd X9.9 software token calculator
                      9: .Sh SYNOPSIS
                     10: .Nm x99token
                     11: .Op Fl d
                     12: .Op Fl i
                     13: .Op Fl k Ar keyfile
                     14: .Op Fl n Ar count
                     15: .Sh DESCRIPTION
1.1       millert    16: The
1.2       millert    17: .Nm x99token
1.1       millert    18: program is a simple X9.9 software token calculator.
                     19: The token is initialized by using the
1.2       millert    20: .Fl i
1.1       millert    21: option.
                     22: In this mode,
1.2       millert    23: .Nm
                     24: requests a key.
                     25: The key consists of 8 bytes encoded in either hex or octal.
                     26: When encoded in hex the key must consist of 16 hex digits,
1.1       millert    27: no spaces (e.g., "0123456789abcdef").
1.2       millert    28: When encoded in octal the key must consist of 8 3 digit octets,
                     29: each separated by exactly one space
1.1       millert    30: (e.g., "001 010 100 002 020 200 003 030").
1.2       millert    31: Once the key is entered, a PIN number is requested.
                     32: The PIN number is used to perturb the key before it is stored in a keyfile.
                     33: This perturbation is not terribly secure.
                     34: You should assume that anyone with access to your
1.1       millert    35: keyfile will also have access to your key.
1.2       millert    36: .Pp
1.1       millert    37: When
1.2       millert    38: .Fl i
1.1       millert    39: is not specified,
1.2       millert    40: .Nm
1.1       millert    41: is in calculator mode.
1.2       millert    42: In this mode you must enter the same PIN as used in the initialization step.
                     43: The PIN is used decode the the key read from the keyfile.
                     44: Next you enter the challenge you have been presented with.
1.1       millert    45: The
1.2       millert    46: .Nm
                     47: program will provide you a response to the challenge.
                     48: If the
                     49: .Fl d
1.1       millert    50: option is used, the response will fold any hex digits to decimal.
                     51: If a
1.2       millert    52: .Ar count
1.1       millert    53: is specified by
1.2       millert    54: .Fl n ,
                     55: it indicates the number of challenges to predict.
                     56: The first challenge is always the entered challenge.
                     57: By default the value of
                     58: .Ar count
1.1       millert    59: is 1, which implies only the entered challenge is resolved.
1.2       millert    60: .Pp
1.1       millert    61: Future challenges are predicted by the following algorithm:
1.2       millert    62: .Bl -bullet -offset indent
                     63: .It
                     64: Encrypt the current challenge with the shared secret key
                     65: .It
                     66: AND each byte of the response with 0x0f
                     67: .It
                     68: Modulo each byte by 10 (0x0a)
                     69: .It
                     70: ADD 0x30 (ASCII value of '0') to each byte
                     71: .El
                     72: .Pp
1.1       millert    73: The resulting 8 bytes are all ASCII decimal digits and are the
                     74: predicted challenge.  This process may be repeated.
1.2       millert    75: .Sh FILES
                     76: .Bl -tag -width $HOME/.keyfile.des -compact
                     77: .It Pa $HOME/.keyfile.des
                     78: default keyfile
                     79: .El
1.3     ! millert    80: .Sh SEE ALSO
        !            81: .Xr tokenadm 8 ,
        !            82: .Xr tokeninit 8
        !            83: .Sh AUTHORS
        !            84: Paul Borman <prb@krystal.com>
        !            85: .Sh CAVEATS
1.1       millert    86: This is a very simple minded program.  It is recommended that the
                     87: keyfile be placed on a floppy disk which you keep physically secure.
1.2       millert    88: .Pp
1.1       millert    89: Having not read the X9.9 standard, this may not be complete or accurate
                     90: implementation of that standard.  This software is provided AS IS
                     91: with no express or implied warranty.