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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] [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.

       -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...
           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.



0.9.7l                                           2004-12-03                                          DGST(1)