One-Time Pad utility
INPUT | otp <pad>
The otp utility applies the OTP cipher against the text passed as input with the key passed as argument.
As for ROT13, otp is its own inverse; that is, to undo otp, the same algorithm is applied with the same key.
$plaintext == $plaintext | otp $key | otp $key
$ cat file.plain | otp "a-random-string-with-same-the-length-of-the-input-file" > /path/to/file.encrypted$ echo -n "hello world!" | hexdump -C
00000000 68 65 6c 6c 6f 20 77 6f 72 6c 64 21 |hello world!|$ echo -n "@@@@@@@@@@@@" | hexdump -C
00000000 40 40 40 40 40 40 40 40 40 40 40 40 |@@@@@@@@@@@@|$ echo -n "hello world!" | otp "@@@@@@@@@@@@" | hexdump -C
00000000 28 25 2c 2c 2f 60 37 2f 32 2c 24 61 |(%,,/`7/2,$a|$ echo -n "@@@@@@@@@@@@" | otp "hello world!" | hexdump -C
00000000 28 25 2c 2c 2f 60 37 2f 32 2c 24 61 |(%,,/`7/2,$a|$ echo -n "hello world!" | otp "@@@@@@@@@@@@" | otp "@@@@@@@@@@@@" | hexdump -C
00000000 68 65 6c 6c 6f 20 77 6f 72 6c 64 21 |hello world!|$ echo -n "hello world!" | otp "hello world!" | hexdump -C
00000000 00 00 00 00 00 00 00 00 00 00 00 00 |............|$ printf "\0\0\0\0\0\0\0\0\0\0\0\0" | otp "hello world!" | hexdump -C
00000000 68 65 6c 6c 6f 20 77 6f 72 6c 64 21 |hello world!|
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