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Annotation of 43BSDReno/domestic/man/des.0, revision 1.1

1.1     ! root        1: DES(1)                     UNIX Reference Manual                       DES(1)
        !             2: 
        !             3: NNAAMMEE
        !             4:      ddeess - DES file encryption
        !             5: 
        !             6: SSYYNNOOPPSSIISS
        !             7:      DDeess --ee [bh] [--kk _k_e_y]
        !             8:      ddeess --ff [bh] [--kk _k_e_y]
        !             9: 
        !            10: DDEESSCCRRIIPPTTIIOONN
        !            11:      ddeess is a filter that encrypts or decrypts standard input to standard out-
        !            12:      put with the Data Encryption Standard (DES).
        !            13: 
        !            14:      Options:
        !            15: 
        !            16:      --ee    (encrypt)
        !            17:      --dd    (decrypt)
        !            18:           Either --ee or --dd must be specified.
        !            19: 
        !            20:      --kk    If the key is not given on the command line with the --kk option the
        !            21:           command will prompt for it twice, suppressing echo and comparing
        !            22:           the two responses to guard against mistyping.
        !            23: 
        !            24:      --hh    The --hh flag controls how the key string is to be interpreted.
        !            25:           Without the --hh flag, the key is an ASCII string.  Since DES ignores
        !            26:           the low order bit of each key byte, the high order bit is set for
        !            27:           odd parity, thus retaining the information contained in the low
        !            28:           order bit.  If the --hh flag is set, the key string is interpreted as
        !            29:           16 hex/ASCII characters; the low order bit of each byte is again
        !            30:           ignored as per the DES algorithm.  This allows the use of any arbi-
        !            31:           trary 56-bit key, including bytes representing control characters
        !            32:           that could not be typed if the -h option were not used.
        !            33: 
        !            34:      --bb    Electronic Code Book (ECB) mode is used.  By default, DES Cipher
        !            35:           Block Chaining (CBC) mode is used, with an initial vector (IV) of
        !            36:           all zeros.
        !            37: 
        !            38:           Except for the --hh option, this command is compatible with the ddeess
        !            39:           command on the Sun Microsystems workstation.
        !            40: 
        !            41: 
        !            42: SSEEEE AALLSSOO
        !            43:      Sun Microsystems DES(1) manual page, which describes in detail how the
        !            44:      length of the file is encoded in the last block of ciphertext.
        !            45: 
        !            46: AAUUTTHHOORR
        !            47:      Phil Karn, KA9Q
        !            48: 
        !            49: HHIISSTTOORRYY
        !            50:      4.3Reno BSD.

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