| 1 | =pod
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| 2 |
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| 3 | =head1 NAME
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| 4 |
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| 5 | openssl-passwd,
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| 6 | passwd - compute password hashes
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| 7 |
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| 8 | =head1 SYNOPSIS
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| 9 |
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| 10 | B<openssl passwd>
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| 11 | [B<-help>]
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| 12 | [B<-crypt>]
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| 13 | [B<-1>]
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| 14 | [B<-apr1>]
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| 15 | [B<-aixmd5>]
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| 16 | [B<-5>]
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| 17 | [B<-6>]
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| 18 | [B<-salt> I<string>]
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| 19 | [B<-in> I<file>]
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| 20 | [B<-stdin>]
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| 21 | [B<-noverify>]
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| 22 | [B<-quiet>]
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| 23 | [B<-table>]
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| 24 | [B<-rand file...>]
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| 25 | [B<-writerand file>]
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| 26 | {I<password>}
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| 27 |
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| 28 | =head1 DESCRIPTION
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| 29 |
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| 30 | The B<passwd> command computes the hash of a password typed at
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| 31 | run-time or the hash of each password in a list. The password list is
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| 32 | taken from the named file for option B<-in file>, from stdin for
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| 33 | option B<-stdin>, or from the command line, or from the terminal otherwise.
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| 34 | The Unix standard algorithm B<crypt> and the MD5-based BSD password
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| 35 | algorithm B<1>, its Apache variant B<apr1>, and its AIX variant are available.
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| 36 |
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| 37 | =head1 OPTIONS
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| 38 |
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| 39 | =over 4
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| 40 |
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| 41 | =item B<-help>
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| 42 |
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| 43 | Print out a usage message.
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| 44 |
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| 45 | =item B<-crypt>
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| 46 |
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| 47 | Use the B<crypt> algorithm (default).
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| 48 |
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| 49 | =item B<-1>
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| 50 |
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| 51 | Use the MD5 based BSD password algorithm B<1>.
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| 52 |
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| 53 | =item B<-apr1>
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| 54 |
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| 55 | Use the B<apr1> algorithm (Apache variant of the BSD algorithm).
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| 56 |
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| 57 | =item B<-aixmd5>
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| 58 |
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| 59 | Use the B<AIX MD5> algorithm (AIX variant of the BSD algorithm).
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| 60 |
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| 61 | =item B<-5>
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| 62 |
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| 63 | =item B<-6>
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| 64 |
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| 65 | Use the B<SHA256> / B<SHA512> based algorithms defined by Ulrich Drepper.
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| 66 | See L<https://www.akkadia.org/drepper/SHA-crypt.txt>.
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| 67 |
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| 68 | =item B<-salt> I<string>
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| 69 |
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| 70 | Use the specified salt.
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| 71 | When reading a password from the terminal, this implies B<-noverify>.
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| 72 |
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| 73 | =item B<-in> I<file>
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| 74 |
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| 75 | Read passwords from I<file>.
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| 76 |
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| 77 | =item B<-stdin>
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| 78 |
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| 79 | Read passwords from B<stdin>.
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| 80 |
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| 81 | =item B<-noverify>
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| 82 |
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| 83 | Don't verify when reading a password from the terminal.
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| 84 |
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| 85 | =item B<-quiet>
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| 86 |
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| 87 | Don't output warnings when passwords given at the command line are truncated.
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| 88 |
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| 89 | =item B<-table>
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| 90 |
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| 91 | In the output list, prepend the cleartext password and a TAB character
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| 92 | to each password hash.
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| 93 |
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| 94 | =item B<-rand file...>
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| 95 |
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| 96 | A file or files containing random data used to seed the random number
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| 97 | generator.
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| 98 | Multiple files can be specified separated by an OS-dependent character.
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| 99 | The separator is B<;> for MS-Windows, B<,> for OpenVMS, and B<:> for
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| 100 | all others.
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| 101 |
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| 102 | =item [B<-writerand file>]
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| 103 |
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| 104 | Writes random data to the specified I<file> upon exit.
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| 105 | This can be used with a subsequent B<-rand> flag.
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| 106 |
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| 107 | =back
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| 108 |
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| 109 | =head1 EXAMPLES
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| 110 |
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| 111 | % openssl passwd -crypt -salt xx password
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| 112 | xxj31ZMTZzkVA
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| 113 |
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| 114 | % openssl passwd -1 -salt xxxxxxxx password
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| 115 | $1$xxxxxxxx$UYCIxa628.9qXjpQCjM4a.
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| 116 |
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| 117 | % openssl passwd -apr1 -salt xxxxxxxx password
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| 118 | $apr1$xxxxxxxx$dxHfLAsjHkDRmG83UXe8K0
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| 119 |
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| 120 | % openssl passwd -aixmd5 -salt xxxxxxxx password
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| 121 | xxxxxxxx$8Oaipk/GPKhC64w/YVeFD/
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| 122 |
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| 123 | =head1 COPYRIGHT
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| 124 |
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| 125 | Copyright 2000-2018 The OpenSSL Project Authors. All Rights Reserved.
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| 126 |
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| 127 | Licensed under the OpenSSL license (the "License"). You may not use
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| 128 | this file except in compliance with the License. You can obtain a copy
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| 129 | in the file LICENSE in the source distribution or at
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| 130 | L<https://www.openssl.org/source/license.html>.
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| 131 |
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| 132 | =cut
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