DGST(1) OpenSSL DGST(1)

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

SYNOPSIS
       ooppeennssssll ddggsstt [-mmdd55||-mmdd44||-mmdd22||-sshhaa11||-sshhaa||-mmddcc22||-rriippeemmdd116600||-ddssss11] [-cc]
       [-dd] [-hheexx] [-bbiinnaarryy] [-oouutt ffiilleennaammee] [-ssiiggnn ffiilleennaammee] [-ppaassssiinn aarrgg]
       [-vveerriiffyy ffiilleennaammee] [-pprrvveerriiffyy ffiilleennaammee] [-ssiiggnnaattuurree ffiilleennaammee] [ffiillee......]

       [mmdd55||mmdd44||mmdd22||sshhaa11||sshhaa||mmddcc22||rriippeemmdd116600] [-cc] [-dd] [ffiillee......]

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.

OOPPTTIIOONNSS
       -cc  print out the digest in two digit groups separated by colons, only
           relevant if hheexx format output is used.

       -dd  print out BIO debugging information.

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

       -bbiinnaarryy
           output the digest or signature in binary form.

       -oouutt ffiilleennaammee
           filename to output to, or standard output by default.

       -ssiiggnn ffiilleennaammee
           digitally sign the digest using the private key in "filename".

       -ppaassssiinn aarrgg
           the private key password source. For more information about the
           format of aarrgg see the PPAASSSS PPHHRRAASSEE AARRGGUUMMEENNTTSS section in openssl(1).

       -vveerriiffyy ffiilleennaammee
           verify the signature using the the public key in "filename".  The
           output is either "Verification OK" or "Verification Failure".

       -pprrvveerriiffyy ffiilleennaammee
           verify the signature using the  the private key in "filename".

       -ssiiggnnaattuurree ffiilleennaammee
           the actual signature to verify.

       -rraanndd ffiillee((ss))
           a file or files containing random data used to seed the random
           number generator, or an EGD socket (see RANDegd(3)).  Multiple
           files can be specified separated by a OS-dependent character.  The
           separator is ;; for MS-Windows, ,, for OpenVMS, and :: for all others.

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

NNOOTTEESS
       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.



0.9.7l                            2004-12-03                           DGST(1)