dgst man page on ElementaryOS

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DGST(1SSL)			    OpenSSL			    DGST(1SSL)

       dgst, md5, md4, md2, sha1, sha, mdc2, ripemd160 - message digests

       openssl dgst [-md5|-md4|-md2|-sha1|-sha|-mdc2|-ripemd160|-dss1] [-c]
       [-d] [-hex] [-binary] [-hmac arg] [-non-fips-allow] [-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.

       -hmac arg
	   set the HMAC key to "arg".

	   allow use of non FIPS digest.

       -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
	   output is either "Verification OK" or "Verification Failure".

       -prverify filename
	   verify the signature using the  the private key in "filename".

       -signature filename
	   the actual signature to verify.

       -hmac key
	   create a hashed MAC using "key".

       -mac alg
	   create MAC (keyed Message Authentication Code). The most popular
	   MAC algorithm is HMAC (hash-based MAC), but there are other MAC
	   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.

1.0.1f				  2014-04-07			    DGST(1SSL)

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