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           openssl dgst [-md5|-md4|-md2|-sha1|-sha|-mdc2|-ripemd160|-dss1] [-c]
           [-d] [-hex] [-binary] [-out filename] [-sign filename] [-keyform arg]
           [-passin arg] [-verify filename] [-prverify filename] [-signature
           filename] [-hmac key] [file...]
           [md5|md4|md2|sha1|sha|mdc2|ripemd160] [-c] [-d] [file...]


           The digest functions output the message digest of a supplied file or
           files in hexadecimal form. They can also be used for digital signing
           and verification.


           -c  print out the digest in two digit groups separated by colons, only
               relevant if hex format output is used.
           -d  print out BIO debugging information.
               digest is to be output as a hex dump. This is the default case for
               a "normal" digest as opposed to a digital signature.
               output the digest or signature in binary form.
           -out filename
               filename to output to, or standard output by default.
           -sign filename
               digitally sign the digest using the private key in "filename".
           -keyform arg
               Specifies the key format to sign digest with. Only PEM and ENGINE
               formats are supported by the dgst command.
           -engine id
               Use engine id for operations (including private key storage).  This
               engine is not used as source for digest algorithms, unless it is
               also specified in the configuration file.
           -sigopt nm:v
               Pass options to the signature algorithm during sign or verify
               operations.  Names and values of these options are algorithm-
           -passin arg
               the private key password source. For more information about the
               format of arg see the PASS PHRASE ARGUMENTS section in openssl(1).
           -verify filename
               verify the signature using the the public key in "filename".  The
               algorithms which are not based on hash, for instance gost-mac
               algorithm, supported by ccgost engine. MAC keys and other options
               should be set via -macopt parameter.
           -macopt nm:v
               Passes options to MAC algorithm, specified by -mac key.  Following
               options are supported by both by HMAC and gost-mac:
                       Specifies MAC key as alphnumeric string (use if key contain
                       printable characters only). String length must conform to
                       any restrictions of the MAC algorithm for example exactly
                       32 chars for gost-mac.
                       Specifies MAC key in hexadecimal form (two hex digits per
                       byte).  Key length must conform to any restrictions of the
                       MAC algorithm for example exactly 32 chars for gost-mac.
           -rand file(s)
               a file or files containing random data used to seed the random
               number generator, or an EGD socket (see RAND_egd(3)).  Multiple
               files can be specified separated by a OS-dependent character.  The
               separator is ; for MS-Windows, , for OpenVMS, and : for all others.
               file or files to digest. If no files are specified then standard
               input is used.


           The digest of choice for all new applications is SHA1. Other digests
           are however still widely used.
           If you wish to sign or verify data using the DSA algorithm then the
           dss1 digest must be used.
           A source of random numbers is required for certain signing algorithms,
           in particular DSA.
           The signing and verify options should only be used if a single file is
           being signed or verified.

    1.0.1e 2013-02-11 DGST(1)


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