openssl-passphrase-options(1ssl) - phpMan

OPENSSL-PASSPHRASE-OPTIONS(1SSL) OpenSSL OPENSSL-PASSPHRASE-OPTIONS(1SSL)

NAME
openssl-passphrase-options - Pass phrase options

SYNOPSIS
openssl command [ options ... ] [ parameters ... ]

DESCRIPTION
Several OpenSSL commands accept password arguments, typically using -passin and -passout
for input and output passwords respectively. These allow the password to be obtained from
a variety of sources. Both of these options take a single argument whose format is
described below. If no password argument is given and a password is required then the user
is prompted to enter one: this will typically be read from the current terminal with
echoing turned off.

Note that character encoding may be relevant, please see passphrase-encoding(7).

OPTIONS
Pass Phrase Option Arguments
Pass phrase arguments can be formatted as follows.

pass:password
The actual password is password. Since the password is visible to utilities (like 'ps'
under Unix) this form should only be used where security is not important.

env:var
Obtain the password from the environment variable var. Since the environment of other
processes is visible on certain platforms (e.g. ps under certain Unix OSes) this
option should be used with caution.

file:pathname
The first line of pathname is the password. If the same pathname argument is supplied
to -passin and -passout arguments then the first line will be used for the input
password and the next line for the output password. pathname need not refer to a
regular file: it could for example refer to a device or named pipe.

fd:number
Read the password from the file descriptor number. This can be used to send the data
via a pipe for example.

stdin
Read the password from standard input.

Licensed under the Apache License 2.0 (the "License"). You may not use this file except
in compliance with the License. You can obtain a copy in the file LICENSE in the source
distribution or at <https://www.openssl.org/source/license.html>.

3.0.2 2025-09-18 OPENSSL-PASSPHRASE-OPTIONS(1SSL)

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