| 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-passphrase-options - Pass phrase options
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| 6 |
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| 7 | =head1 SYNOPSIS
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| 8 |
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| 9 | B<openssl>
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| 10 | I<command>
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| 11 | [ I<options> ... ]
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| 12 | [ I<parameters> ... ]
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| 13 |
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| 14 | =head1 DESCRIPTION
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| 15 |
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| 16 | Several OpenSSL commands accept password arguments, typically using B<-passin>
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| 17 | and B<-passout> for input and output passwords respectively. These allow
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| 18 | the password to be obtained from a variety of sources. Both of these
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| 19 | options take a single argument whose format is described below. If no
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| 20 | password argument is given and a password is required then the user is
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| 21 | prompted to enter one: this will typically be read from the current
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| 22 | terminal with echoing turned off.
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| 23 |
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| 24 | Note that character encoding may be relevant, please see
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| 25 | L<passphrase-encoding(7)>.
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| 26 |
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| 27 | =head1 OPTIONS
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| 28 |
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| 29 | =head2 Pass Phrase Option Arguments
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| 30 |
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| 31 | Pass phrase arguments can be formatted as follows.
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| 32 |
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| 33 | =over 4
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| 34 |
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| 35 | =item B<pass:>I<password>
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| 36 |
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| 37 | The actual password is I<password>. Since the password is visible
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| 38 | to utilities (like 'ps' under Unix) this form should only be used
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| 39 | where security is not important.
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| 40 |
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| 41 | =item B<env:>I<var>
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| 42 |
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| 43 | Obtain the password from the environment variable I<var>. Since
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| 44 | the environment of other processes is visible on certain platforms
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| 45 | (e.g. ps under certain Unix OSes) this option should be used with caution.
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| 46 |
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| 47 | =item B<file:>I<pathname>
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| 48 |
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| 49 | The first line of I<pathname> is the password. If the same I<pathname>
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| 50 | argument is supplied to B<-passin> and B<-passout> arguments then the first
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| 51 | line will be used for the input password and the next line for the output
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| 52 | password. I<pathname> need not refer to a regular file: it could for example
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| 53 | refer to a device or named pipe.
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| 54 |
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| 55 | =item B<fd:>I<number>
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| 56 |
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| 57 | Read the password from the file descriptor I<number>. This can be used to
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| 58 | send the data via a pipe for example.
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| 59 |
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| 60 | =item B<stdin>
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| 61 |
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| 62 | Read the password from standard input.
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| 63 |
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| 64 | =back
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| 65 |
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| 66 | =head1 COPYRIGHT
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| 67 |
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| 68 | Copyright 2000-2020 The OpenSSL Project Authors. All Rights Reserved.
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| 69 |
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| 70 | Licensed under the Apache License 2.0 (the "License"). You may not use
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| 71 | this file except in compliance with the License. You can obtain a copy
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| 72 | in the file LICENSE in the source distribution or at
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| 73 | L<https://www.openssl.org/source/license.html>.
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| 74 |
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| 75 | =cut
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