1=pod 2 3=head1 NAME 4 5openssl-passwd, 6passwd - compute password hashes 7 8=head1 SYNOPSIS 9 10B<openssl passwd> 11[B<-help>] 12[B<-crypt>] 13[B<-1>] 14[B<-apr1>] 15[B<-aixmd5>] 16[B<-5>] 17[B<-6>] 18[B<-salt> I<string>] 19[B<-in> I<file>] 20[B<-stdin>] 21[B<-noverify>] 22[B<-quiet>] 23[B<-table>] 24[B<-rand file...>] 25[B<-writerand file>] 26{I<password>} 27 28=head1 DESCRIPTION 29 30The B<passwd> command computes the hash of a password typed at 31run-time or the hash of each password in a list. The password list is 32taken from the named file for option B<-in file>, from stdin for 33option B<-stdin>, or from the command line, or from the terminal otherwise. 34 35=head1 OPTIONS 36 37=over 4 38 39=item B<-help> 40 41Print out a usage message. 42 43=item B<-crypt> 44 45Use the B<crypt> algorithm (default). 46 47=item B<-1> 48 49Use the MD5 based BSD password algorithm B<1>. 50 51=item B<-apr1> 52 53Use the B<apr1> algorithm (Apache variant of the BSD algorithm). 54 55=item B<-aixmd5> 56 57Use the B<AIX MD5> algorithm (AIX variant of the BSD algorithm). 58 59=item B<-5> 60 61=item B<-6> 62 63Use the B<SHA256> / B<SHA512> based algorithms defined by Ulrich Drepper. 64See L<https://www.akkadia.org/drepper/SHA-crypt.txt>. 65 66=item B<-salt> I<string> 67 68Use the specified salt. 69When reading a password from the terminal, this implies B<-noverify>. 70 71=item B<-in> I<file> 72 73Read passwords from I<file>. 74 75=item B<-stdin> 76 77Read passwords from B<stdin>. 78 79=item B<-noverify> 80 81Don't verify when reading a password from the terminal. 82 83=item B<-quiet> 84 85Don't output warnings when passwords given at the command line are truncated. 86 87=item B<-table> 88 89In the output list, prepend the cleartext password and a TAB character 90to each password hash. 91 92=item B<-rand file...> 93 94A file or files containing random data used to seed the random number 95generator. 96Multiple files can be specified separated by an OS-dependent character. 97The separator is B<;> for MS-Windows, B<,> for OpenVMS, and B<:> for 98all others. 99 100=item [B<-writerand file>] 101 102Writes random data to the specified I<file> upon exit. 103This can be used with a subsequent B<-rand> flag. 104 105=back 106 107=head1 EXAMPLES 108 109 % openssl passwd -crypt -salt xx password 110 xxj31ZMTZzkVA 111 112 % openssl passwd -1 -salt xxxxxxxx password 113 $1$xxxxxxxx$UYCIxa628.9qXjpQCjM4a. 114 115 % openssl passwd -apr1 -salt xxxxxxxx password 116 $apr1$xxxxxxxx$dxHfLAsjHkDRmG83UXe8K0 117 118 % openssl passwd -aixmd5 -salt xxxxxxxx password 119 xxxxxxxx$8Oaipk/GPKhC64w/YVeFD/ 120 121=head1 COPYRIGHT 122 123Copyright 2000-2021 The OpenSSL Project Authors. All Rights Reserved. 124 125Licensed under the OpenSSL license (the "License"). You may not use 126this file except in compliance with the License. You can obtain a copy 127in the file LICENSE in the source distribution or at 128L<https://www.openssl.org/source/license.html>. 129 130=cut 131