openssl command [ command_opts ] [ command_args ]

       openssl list [ standard-commands | digest-commands | cipher-commands |
       cipher-algorithms | digest-algorithms | public-key-algorithms]

       openssl no-XXX [ arbitrary options ]

       OpenSSL is a cryptography toolkit implementing the Secure Sockets Layer
       (SSL v2/v3) and Transport Layer Security (TLS v1) network protocols and
       related cryptography standards required by them.

       The openssl program is a command line tool for using the various
       cryptography functions of OpenSSL's crypto library from the shell.  It
       can be used for

        o  Creation and management of private keys, public keys and parameters
        o  Public key cryptographic operations
        o  Creation of X.509 certificates, CSRs and CRLs
        o  Calculation of Message Digests
        o  Encryption and Decryption with Ciphers
        o  SSL/TLS Client and Server Tests
        o  Handling of S/MIME signed or encrypted mail
        o  Time Stamp requests, generation and verification

       The openssl program provides a rich variety of commands (command in the
       SYNOPSIS above), each of which often has a wealth of options and
       arguments (command_opts and command_args in the SYNOPSIS).

       Many commands use an external configuration file for some or all of
       their arguments and have a -config option to specify that file.  The
       environment variable OPENSSL_CONF can be used to specify the location
       of the file.  If the environment variable is not specified, then the
       file is named openssl.cnf in the default certificate storage area,
       whose value depends on the configuration flags specified when the
       OpenSSL was built.

       The list parameters standard-commands, digest-commands, and cipher-
       commands output a list (one entry per line) of the names of all
       standard commands, message digest commands, or cipher commands,
       respectively, that are available in the present openssl utility.

       The list parameters cipher-algorithms and digest-algorithms list all
       cipher and message digest names, one entry per line. Aliases are listed

        from => to

       The list parameter public-key-algorithms lists all supported public key

       The command no-XXX tests whether a command of the specified name is
       available.  If no command named XXX exists, it returns 0 (success) and
       ca  Certificate Authority (CA) Management.

           Cipher Suite Description Determination.

       cms CMS (Cryptographic Message Syntax) utility.

       crl Certificate Revocation List (CRL) Management.

           CRL to PKCS#7 Conversion.

           Message Digest Calculation.

       dh  Diffie-Hellman Parameter Management.  Obsoleted by dhparam.

           Generation and Management of Diffie-Hellman Parameters. Superseded
           by genpkey and pkeyparam.

       dsa DSA Data Management.

           DSA Parameter Generation and Management. Superseded by genpkey and

       ec  EC (Elliptic curve) key processing.

           EC parameter manipulation and generation.

       enc Encoding with Ciphers.

           Engine (loadable module) information and manipulation.

           Error Number to Error String Conversion.

           Generation of Diffie-Hellman Parameters.  Obsoleted by dhparam.

           Generation of DSA Private Key from Parameters. Superseded by
           genpkey and pkey.

           Generation of Private Key or Parameters.

           Generation of RSA Private Key. Superseded by genpkey.

           PKCS#7 Data Management.

           PKCS#8 format private key conversion tool.

           Public and private key management.

           Public key algorithm parameter management.

           Public key algorithm cryptographic operation utility.

           Generate pseudo-random bytes.

           Create symbolic links to certificate and CRL files named by the
           hash values.

       req PKCS#10 X.509 Certificate Signing Request (CSR) Management.

       rsa RSA key management.

           RSA utility for signing, verification, encryption, and decryption.
           Superseded by  pkeyutl.

           This implements a generic SSL/TLS client which can establish a
           transparent connection to a remote server speaking SSL/TLS. It's
           intended for testing purposes only and provides only rudimentary
           interface functionality but internally uses mostly all
           functionality of the OpenSSL ssl library.

           This implements a generic SSL/TLS server which accepts connections
           from remote clients speaking SSL/TLS. It's intended for testing
           purposes only and provides only rudimentary interface functionality
           but internally uses mostly all functionality of the OpenSSL ssl
           library.  It provides both an own command line oriented protocol
           for testing SSL functions and a simple HTTP response facility to
           emulate an SSL/TLS-aware webserver.

           SSL Connection Timer.

           SSL Session Data Management.

           S/MIME mail processing.

           OpenSSL Version Information.

           X.509 Certificate Data Management.

   Message Digest Commands
       md2 MD2 Digest

       md5 MD5 Digest

           MDC2 Digest

           RMD-160 Digest

       sha SHA Digest

           SHA-1 Digest

           SHA-224 Digest

           SHA-256 Digest

           SHA-384 Digest

           SHA-512 Digest

   Encoding and Cipher Commands
           Base64 Encoding

       bf bf-cbc bf-cfb bf-ecb bf-ofb
           Blowfish Cipher

       cast cast-cbc
           CAST Cipher

       cast5-cbc cast5-cfb cast5-ecb cast5-ofb
           CAST5 Cipher

       des des-cbc des-cfb des-ecb des-ede des-ede-cbc des-ede-cfb des-ede-ofb
           DES Cipher

       des3 desx des-ede3 des-ede3-cbc des-ede3-cfb des-ede3-ofb
           Triple-DES Cipher

       idea idea-cbc idea-cfb idea-ecb idea-ofb
       This section describes some common options with common behavior.

   Common Options
           Provides a terse summary of all options.

   Pass Phrase Options
       Several 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.

           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.

           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

           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.

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

           Read the password from standard input.

       asn1parse(1), ca(1), ciphers(1), cms(1), config(5), crl(1),
       crl2pkcs7(1), dgst(1), dhparam(1), dsa(1), dsaparam(1), ec(1),
       ecparam(1), enc(1), engine(1), errstr(1), gendsa(1), genpkey(1),
       genrsa(1), nseq(1), ocsp(1), passwd(1), pkcs12(1), pkcs7(1), pkcs8(1),
       pkey(1), pkeyparam(1), pkeyutl(1), rand(1), rehash(1), req(1), rsa(1),
       rsautl(1), s_client(1), s_server(1), s_time(1), sess_id(1), smime(1),
       speed(1), spkac(1), ts(1), verify(1), version(1), x509(1), crypto(7),
       ssl(7), x509v3_config(5)

       The list-XXX-algorithms pseudo-commands were added in OpenSSL 1.0.0;
       For notes on the availability of other commands, see their individual
       manual pages.
Man Pages Copyright Respective Owners. Site Copyright (C) 1994 - 2019 Hurricane Electric. All Rights Reserved.