mirror of https://github.com/openssl/openssl.git
76 lines
2.1 KiB
Plaintext
76 lines
2.1 KiB
Plaintext
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=pod
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=head1 NAME
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openssl-passphrase-options - Pass phrase options
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=head1 SYNOPSIS
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B<openssl>
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I<command>
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[ I<options> ... ]
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[ I<parameters> ... ]
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=head1 DESCRIPTION
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Several OpenSSL commands accept password arguments, typically using B<-passin>
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and B<-passout> for input and output passwords respectively. These allow
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the password to be obtained from a variety of sources. Both of these
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options take a single argument whose format is described below. If no
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password argument is given and a password is required then the user is
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prompted to enter one: this will typically be read from the current
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terminal with echoing turned off.
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Note that character encoding may be relevant, please see
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L<passphrase-encoding(7)>.
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=head1 OPTIONS
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=head2 Pass Phrase Option Arguments
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Pass phrase arguments can be formatted as follows.
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=over 4
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=item B<pass:>I<password>
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The actual password is I<password>. Since the password is visible
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to utilities (like 'ps' under Unix) this form should only be used
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where security is not important.
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=item B<env:>I<var>
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Obtain the password from the environment variable I<var>. Since
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the environment of other processes is visible on certain platforms
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(e.g. ps under certain Unix OSes) this option should be used with caution.
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=item B<file:>I<pathname>
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The first line of I<pathname> is the password. If the same I<pathname>
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argument is supplied to B<-passin> and B<-passout> arguments then the first
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line will be used for the input password and the next line for the output
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password. I<pathname> need not refer to a regular file: it could for example
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refer to a device or named pipe.
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=item B<fd:>I<number>
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Read the password from the file descriptor I<number>. This can be used to
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send the data via a pipe for example.
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=item B<stdin>
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Read the password from standard input.
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=back
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=head1 COPYRIGHT
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Copyright 2000-2020 The OpenSSL Project Authors. All Rights Reserved.
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Licensed under the Apache License 2.0 (the "License"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file LICENSE in the source distribution or at
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L<https://www.openssl.org/source/license.html>.
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=cut
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