1DGST(1)                             OpenSSL                            DGST(1)
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NAME

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

9       openssl dgst [-md5⎪-md4⎪-md2⎪-sha1⎪-sha⎪-mdc2⎪-ripemd160⎪-dss1] [-c]
10       [-d] [-hex] [-binary] [-out filename] [-sign filename] [-passin arg]
11       [-verify filename] [-prverify filename] [-signature filename] [file...]
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13       [md5⎪md4⎪md2⎪sha1⎪sha⎪mdc2⎪ripemd160] [-c] [-d] [file...]
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DESCRIPTION

16       The digest functions output the message digest of a supplied file or
17       files in hexadecimal form. They can also be used for digital signing
18       and verification.
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OPTIONS

21       -c  print out the digest in two digit groups separated by colons, only
22           relevant if hex format output is used.
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24       -d  print out BIO debugging information.
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26       -hex
27           digest is to be output as a hex dump. This is the default case for
28           a "normal" digest as opposed to a digital signature.
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30       -binary
31           output the digest or signature in binary form.
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33       -out filename
34           filename to output to, or standard output by default.
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36       -sign filename
37           digitally sign the digest using the private key in "filename".
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39       -passin arg
40           the private key password source. For more information about the
41           format of arg see the PASS PHRASE ARGUMENTS section in openssl(1).
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43       -verify filename
44           verify the signature using the the public key in "filename".  The
45           output is either "Verification OK" or "Verification Failure".
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47       -prverify filename
48           verify the signature using the  the private key in "filename".
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50       -signature filename
51           the actual signature to verify.
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53       -rand file(s)
54           a file or files containing random data used to seed the random num‐
55           ber generator, or an EGD socket (see RAND_egd(3)).  Multiple files
56           can be specified separated by a OS-dependent character.  The sepa‐
57           rator is ; for MS-Windows, , for OpenVMS, and : for all others.
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59       file...
60           file or files to digest. If no files are specified then standard
61           input is used.
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NOTES

64       The digest of choice for all new applications is SHA1. Other digests
65       are however still widely used.
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67       If you wish to sign or verify data using the DSA algorithm then the
68       dss1 digest must be used.
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70       A source of random numbers is required for certain signing algorithms,
71       in particular DSA.
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73       The signing and verify options should only be used if a single file is
74       being signed or verified.
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780.9.8b                            2004-12-03                           DGST(1)