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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] [-passin arg]
       [-verify filename] [-prverify filename] [-signature filename] [-hmac
       key] [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".

       -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".

       -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.

0.9.8k				  2009-05-20			       DGST(1)

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