DGST(1)                             OpenSSL                            DGST(1)



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

LIBRARY
       libcrypto, -lcrypto

SYNOPSIS
       openssl dgst [-md5|-md4|-md2|-sha1|-sha|-mdc2|-ripemd160|-dss1] [-c]
       [-d] [-hex] [-binary] [-out filename] [-sign filename] [-keyform arg]
       [-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".

       -keyform arg
           Specifies the key format to sign digest with. Only PEM and ENGINE
           formats are supported by the dgst command.

       -engine id
           Use engine id for operations (including private key storage).  This
           engine is not used as source for digest algorithms, unless it is
           also specified in the configuration file.

       -sigopt nm:v
           Pass options to the signature algorithm during sign or verify
           operations.  Names and values of these options are algorithm-
           specific.

       -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".

       -mac alg
           create MAC (keyed Message Authentication Code). The most popular
           MAC algorithm is HMAC (hash-based MAC), but there are other MAC
           algorithms which are not based on hash, for instance gost-mac
           algorithm, supported by ccgost engine. MAC keys and other options
           should be set via -macopt parameter.

       -macopt nm:v
           Passes options to MAC algorithm, specified by -mac key.  Following
           options are supported by both by HMAC and gost-mac:

           key:string
                   Specifies MAC key as alphnumeric string (use if key contain
                   printable characters only). String length must conform to
                   any restrictions of the MAC algorithm for example exactly
                   32 chars for gost-mac.

           hexkey:string
                   Specifies MAC key in hexadecimal form (two hex digits per
                   byte).  Key length must conform to any restrictions of the
                   MAC algorithm for example exactly 32 chars for gost-mac.

       -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.



1.0.1i                            2009-07-20                           DGST(1)

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©1996-2014 Modified for NetBSD by Kimmo Suominen