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+.TH FILE2KEY 8 file2key
+
+.SH NAME
+file2key - generates a key from a file and a passphrase
+
+.SH SYNOPSIS
+.B file2key
+.RI [ file ]
+
+.SH DESCRIPTION
+.B file2key
+uses Keccak[] to create a hash as big as a selected
+file and the prints the bitwise exclusive or of the
+hash and the file making a key file from any normal
+file and a passphrase.
+.PP
+The idea is the reversed of steganography.
+.PP
+.B file2key
+can also be used to encrypt and decrypt files.
+
+.SH OPTIONS
+The
+.B file2key
+utility conforms to the Base Definitions volume of POSIX.1-2017,
+.IR "Section 12.2" ,
+.IR "Utility Syntax Guidelines" .
+.PP
+No options are supported.
+
+.SH OPERANDS
+The following operands are supported:
+.TP
+.I file
+The file to generate a key from.
+
+.SH STDIN
+The
+.B file2key
+utility generate a key from the standard input is no
+.I file
+is specified, or if the specified file is
+.RB \(dq - \(dq.
+
+.SH INPUT FILES
+The input file can be any file type.
+
+.SH ENVIRONMENT VARIABLES
+No environment variables affects the execution of
+.BR file2key
+
+.SH ASYNCHRONOUS EVENTS
+Default.
+
+.SH STDOUT
+The
+.B file2key
+utility prints the input
+.I file
+bitwise XORed with the hash of the passphrase
+to the standard output.
+
+.SH STDERR
+The standard error is used for diagnostic messages and the
+passphrase prompt.
+
+.SH OUTPUT FILES
+None.
+
+.SH EXTENDED DESCRIPTION
+None.
+
+.SH EXIT STATUS
+If the
+.B asroot
+utility fails it will exit withone of the following statuses:
+.TP
+0
+Successful completion.
+.TP
+1
+User error.
+.TP
+2
+An error occurred.
+
+.SH CONSEQUENCES OF ERRORS
+Default.
+
+.SH APPLICATION USAGE
+None.
+
+.SH EXAMPLES
+None.
+
+.SH RATIONALE
+.B file2key
+cannot be configured. The idea behind this is that you
+if it required configurations you run the risk of losing
+all your keys if you lose your configurations. This must
+not happen.
+
+.SH NOTES
+None.
+
+.SH BUGS
+None.
+
+.SH FUTURE DIRECTIONS
+None.
+
+.SH SEE ALSO
+None.