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All data conversion commands support only one option,
-mode. Allowed values are ``encode'', ``decode'' and
all unique abbreviations.
For immediate usage it specifies the
operation to use.
For attached transformations it specifies the
operation to use for writing. Reading
will automatically use the reverse operation.
Encode converts from binary data into the described
representation, decode does the reverse (obviously  ).
Standard conversions are
| bin |
Converts bytes into dual representation.
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| oct |
Converts bytes into octal representation.
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| hex |
Converts bytes into hexadecimal representation.
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None of them buffers characters internally.
| uuencode |
Blocks of 3 characters are uuencoded/decoded. Will
buffer 2 characters internally until a block is complete.
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| base64 |
Blocks of 3 characters are base64-encoded/decoded. This is
equivalent to PGP's ASCII armor. Used by MIME too. Will
buffer 2 characters internally until a block is complete.
See RFC 2045 for its definition.
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| ascii85 |
Blocks of 4 characters will be encoded into Ascii85
representation as defined in the 'Postscript Reference
Manual' (2nd Edition, section 3.13, page 129).
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| otp_words |
Blocks of 64-bits are encoded as six English words,
as defined in RFC 2289.
See also otp_md5.
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| quoted-printable |
Printable ASCII characters are largely untouched. Otherwise
a three-character encoding sequence is used. This is MIME's
compromise encoding. See RFC 2045 for its definition.
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With the exception of otp_words
all of these are able to convert an incomplete block at the
end of input.
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