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. 34The Unix standard algorithm B<crypt> and the MD5-based BSD password 35algorithm B<1>, its Apache variant B<apr1>, and its AIX variant are available. 36 37=head1 OPTIONS 38 39=over 4 40 41=item B<-help> 42 43Print out a usage message. 44 45=item B<-crypt> 46 47Use the B<crypt> algorithm (default). 48 49=item B<-1> 50 51Use the MD5 based BSD password algorithm B<1>. 52 53=item B<-apr1> 54 55Use the B<apr1> algorithm (Apache variant of the BSD algorithm). 56 57=item B<-aixmd5> 58 59Use the B<AIX MD5> algorithm (AIX variant of the BSD algorithm). 60 61=item B<-5> 62 63=item B<-6> 64 65Use the B<SHA256> / B<SHA512> based algorithms defined by Ulrich Drepper. 66See L<https://www.akkadia.org/drepper/SHA-crypt.txt>. 67 68=item B<-salt> I<string> 69 70Use the specified salt. 71When reading a password from the terminal, this implies B<-noverify>. 72 73=item B<-in> I<file> 74 75Read passwords from I<file>. 76 77=item B<-stdin> 78 79Read passwords from B<stdin>. 80 81=item B<-noverify> 82 83Don't verify when reading a password from the terminal. 84 85=item B<-quiet> 86 87Don't output warnings when passwords given at the command line are truncated. 88 89=item B<-table> 90 91In the output list, prepend the cleartext password and a TAB character 92to each password hash. 93 94=item B<-rand file...> 95 96A file or files containing random data used to seed the random number 97generator. 98Multiple files can be specified separated by an OS-dependent character. 99The separator is B<;> for MS-Windows, B<,> for OpenVMS, and B<:> for 100all others. 101 102=item [B<-writerand file>] 103 104Writes random data to the specified I<file> upon exit. 105This can be used with a subsequent B<-rand> flag. 106 107=back 108 109=head1 EXAMPLES 110 111 % openssl passwd -crypt -salt xx password 112 xxj31ZMTZzkVA 113 114 % openssl passwd -1 -salt xxxxxxxx password 115 $1$xxxxxxxx$UYCIxa628.9qXjpQCjM4a. 116 117 % openssl passwd -apr1 -salt xxxxxxxx password 118 $apr1$xxxxxxxx$dxHfLAsjHkDRmG83UXe8K0 119 120 % openssl passwd -aixmd5 -salt xxxxxxxx password 121 xxxxxxxx$8Oaipk/GPKhC64w/YVeFD/ 122 123=head1 COPYRIGHT 124 125Copyright 2000-2018 The OpenSSL Project Authors. All Rights Reserved. 126 127Licensed under the OpenSSL license (the "License"). You may not use 128this file except in compliance with the License. You can obtain a copy 129in the file LICENSE in the source distribution or at 130L<https://www.openssl.org/source/license.html>. 131 132=cut 133