=pod =head1 NAME 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 B<openssl passwd -crypt -salt xx password> prints B<xxj31ZMTZzkVA>. B<openssl passwd -1 -salt xxxxxxxx password> prints B<$1$xxxxxxxx$UYCIxa628.9qXjpQCjM4a.>. B<openssl passwd -apr1 -salt xxxxxxxx password> prints B<$apr1$xxxxxxxx$dxHfLAsjHkDRmG83UXe8K0>. B<openssl passwd -aixmd5 -salt xxxxxxxx password> prints B<xxxxxxxx$8Oaipk/GPKhC64w/YVeFD/>. =head1 COPYRIGHT Copyright 2000-2016 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