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DGST(1)				    OpenSSL			       DGST(1)

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

SYNOPSIS
       openssl dgst [-md5|-md4|-md2|-sha1|-sha|-mdc2|-ripemd160|-dss1] [-c]
       [-d] [-hex] [-binary] [-out filename] [-sign filename] [-verify file-
       name] [-prverify	filename] [-signature filename]	[file...]

       [md5|md4|md2|sha1|sha|mdc2|ripemd160] [-c] [-d] [file...]

DESCRIPTION
       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.

OPTIONS
       -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.

       -hex
	   digest is to	be output as a hex dump. This is the default case for
	   a "normal" digest as	opposed	to a digital signature.

       -binary
	   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".

       -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.

       -rand file(s)
	   a file or files containing random data used to seed the random num-
	   ber generator, or an	EGD socket (see	RAND_egd(3)).  Multiple	files
	   can be specified separated by a OS-dependent	character.  The	sepa-
	   rator is ; for MS-Windows, ,	for OpenVMS, and : for all others.

       file...
	   file	or files to digest. If no files	are specified then standard
	   input is used.

NOTES
       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.

0.9.7d				  2005-02-25			       DGST(1)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | NOTES

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