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|
=pod
=head1 NAME
openssl-passwd,
passwd - compute password hashes
=head1 SYNOPSIS
B<openssl passwd>
[B<-help>]
[B<-crypt>]
[B<-1>]
[B<-apr1>]
[B<-aixmd5>]
[B<-5>]
[B<-6>]
[B<-salt> I<string>]
[B<-in> I<file>]
[B<-stdin>]
[B<-noverify>]
[B<-quiet>]
[B<-table>]
[B<-rand file...>]
[B<-writerand file>]
{I<password>}
=head1 DESCRIPTION
The B<passwd> command computes the hash of a password typed at
run-time or the hash of each password in a list. The password list is
taken from the named file for option B<-in file>, from stdin for
option B<-stdin>, or from the command line, or from the terminal otherwise.
The Unix standard algorithm B<crypt> and the MD5-based BSD password
algorithm B<1>, its Apache variant B<apr1>, and its AIX variant are available.
=head1 OPTIONS
=over 4
=item B<-help>
Print out a usage message.
=item B<-crypt>
Use the B<crypt> algorithm (default).
=item B<-1>
Use the MD5 based BSD password algorithm B<1>.
=item B<-apr1>
Use the B<apr1> algorithm (Apache variant of the BSD algorithm).
=item B<-aixmd5>
Use the B<AIX MD5> algorithm (AIX variant of the BSD algorithm).
=item B<-5>
=item B<-6>
Use the B<SHA256> / B<SHA512> based algorithms defined by Ulrich Drepper.
See L<https://www.akkadia.org/drepper/SHA-crypt.txt>.
=item B<-salt> I<string>
Use the specified salt.
When reading a password from the terminal, this implies B<-noverify>.
=item B<-in> I<file>
Read passwords from I<file>.
=item B<-stdin>
Read passwords from B<stdin>.
=item B<-noverify>
Don't verify when reading a password from the terminal.
=item B<-quiet>
Don't output warnings when passwords given at the command line are truncated.
=item B<-table>
In the output list, prepend the cleartext password and a TAB character
to each password hash.
=item B<-rand file...>
A file or files containing random data used to seed the random number
generator.
Multiple files can be specified separated by an OS-dependent character.
The separator is B<;> for MS-Windows, B<,> for OpenVMS, and B<:> for
all others.
=item [B<-writerand file>]
Writes random data to the specified I<file> upon exit.
This can be used with a subsequent B<-rand> flag.
=back
=head1 EXAMPLES
% openssl passwd -crypt -salt xx password
xxj31ZMTZzkVA
% openssl passwd -1 -salt xxxxxxxx password
$1$xxxxxxxx$UYCIxa628.9qXjpQCjM4a.
% openssl passwd -apr1 -salt xxxxxxxx password
$apr1$xxxxxxxx$dxHfLAsjHkDRmG83UXe8K0
% openssl passwd -aixmd5 -salt xxxxxxxx password
xxxxxxxx$8Oaipk/GPKhC64w/YVeFD/
=head1 COPYRIGHT
Copyright 2000-2018 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the OpenSSL license (the "License"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file LICENSE in the source distribution or at
L<https://www.openssl.org/source/license.html>.
=cut
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