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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
     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".

     -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.









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Created 1996-2024 by Maxim Chirkov

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