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           openssl command [ command_opts ] [ command_args ]
           openssl [ list-standard-commands | list-message-digest-commands | list-
           cipher-commands | list-cipher-algorithms | list-message-digest-
           algorithms | list-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).
           The pseudo-commands list-standard-commands, list-message-digest-
           commands, and list-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 pseudo-commands list-cipher-algorithms and list-message-digest-
           algorithms list all cipher and message digest names, one entry per
           line. Aliases are listed as:
            from => to
           The pseudo-command list-public-key-algorithms lists all supported
           public key algorithms.
           The pseudo-command no-XXX tests whether a command of the specified name
           is available.  If no command named XXX exists, it returns 0 (success)
           and prints no-XXX; otherwise it returns 1 and prints XXX.  In both
           cases, the output goes to stdout and nothing is printed to stderr.
           Additional command line arguments are always ignored.  Since for each
           crl       Certificate Revocation List (CRL) Management.
           crl2pkcs7 CRL to PKCS#7 Conversion.
           dgst      Message Digest Calculation.
           dh        Diffie-Hellman Parameter Management.  Obsoleted by dhparam.
           dhparam   Generation and Management of Diffie-Hellman Parameters.
                     Superseded by genpkey and pkeyparam
           dsa       DSA Data Management.
           dsaparam  DSA Parameter Generation and Management. Superseded by
                     genpkey and pkeyparam
           ec        EC (Elliptic curve) key processing
           ecparam   EC parameter manipulation and generation
           enc       Encoding with Ciphers.
           engine    Engine (loadble module) information and manipulation.
           errstr    Error Number to Error String Conversion.
           gendh     Generation of Diffie-Hellman Parameters.  Obsoleted by
           gendsa    Generation of DSA Private Key from Parameters. Superseded by
                     genpkey and pkey
           genpkey   Generation of Private Key or Parameters.
           genrsa    Generation of RSA Private Key. Superceded by genpkey.
           nseq      Create or examine a netscape certificate sequence
           ocsp      Online Certificate Status Protocol utility.
           passwd    Generation of hashed passwords.
           pkcs12    PKCS#12 Data Management.
           pkcs7     PKCS#7 Data Management.
           pkey      Public and private key management.
           pkeyparam Public key algorithm parameter management.
           pkeyutl   Public key algorithm cryptographic operation utility.
           s_server  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.
           s_time    SSL Connection Timer.
           sess_id   SSL Session Data Management.
           smime     S/MIME mail processing.
           speed     Algorithm Speed Measurement.
           spkac     SPKAC printing and generating utility
           ts        Time Stamping Authority tool (client/server)
           verify    X.509 Certificate Verification.
           version   OpenSSL Version Information.
           x509      X.509 Certificate Data Management.
           md2       MD2 Digest
           md5       MD5 Digest
           mdc2      MDC2 Digest
           rmd160    RMD-160 Digest
           sha       SHA Digest
           sha1      SHA-1 Digest
           sha224    SHA-224 Digest
           sha256    SHA-256 Digest
           sha384    SHA-384 Digest
           sha512    SHA-512 Digest
           base64    Base64 Encoding
                     Triple-DES Cipher
           idea idea-cbc idea-cfb idea-ecb idea-ofb
                     IDEA Cipher
           rc2 rc2-cbc rc2-cfb rc2-ecb rc2-ofb
                     RC2 Cipher
           rc4       RC4 Cipher
           rc5 rc5-cbc rc5-cfb rc5-ecb rc5-ofb
                     RC5 Cipher


           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.
           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.
                     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.


           asn1parse(1), ca(1), config(5), crl(1), crl2pkcs7(1), dgst(1),
           dhparam(1), dsa(1), dsaparam(1), enc(1), gendsa(1), genpkey(1),
           genrsa(1), nseq(1), openssl(1), sslpasswd(1), pkcs12(1), pkcs7(1),
           pkcs8(1), sslrand(1), req(1), rsa(1), rsautl(1), s_client(1),
           s_server(1), s_time(1), smime(1), spkac(1), verify(1), version(1),
           x509(1), crypto(3), ssl(3), x509v3_config(5)

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