1DGST(1)                             OpenSSL                            DGST(1)
2
3
4

NAME

6       dgst, md5, md4, md2, sha1, sha, mdc2, ripemd160 - message digests
7

SYNOPSIS

9       openssl dgst [-md5|-md4|-md2|-sha1|-sha|-mdc2|-ripemd160|-dss1] [-c]
10       [-d] [-hex] [-binary] [-out filename] [-sign filename] [-keyform arg]
11       [-passin arg] [-verify filename] [-prverify filename] [-signature
12       filename] [-hmac key] [file...]
13
14       [md5|md4|md2|sha1|sha|mdc2|ripemd160] [-c] [-d] [file...]
15

DESCRIPTION

17       The digest functions output the message digest of a supplied file or
18       files in hexadecimal form. They can also be used for digital signing
19       and verification.
20

OPTIONS

22       -c  print out the digest in two digit groups separated by colons, only
23           relevant if hex format output is used.
24
25       -d  print out BIO debugging information.
26
27       -hex
28           digest is to be output as a hex dump. This is the default case for
29           a "normal" digest as opposed to a digital signature.
30
31       -binary
32           output the digest or signature in binary form.
33
34       -out filename
35           filename to output to, or standard output by default.
36
37       -sign filename
38           digitally sign the digest using the private key in "filename".
39
40       -keyform arg
41           Specifies the key format to sign digest with. Only PEM and ENGINE
42           formats are supported by the dgst command.
43
44       -engine id
45           Use engine id for operations (including private key storage).  This
46           engine is not used as source for digest algorithms, unless it is
47           also specified in the configuration file.
48
49       -sigopt nm:v
50           Pass options to the signature algorithm during sign or verify
51           operations.  Names and values of these options are algorithm-
52           specific.
53
54       -passin arg
55           the private key password source. For more information about the
56           format of arg see the PASS PHRASE ARGUMENTS section in openssl(1).
57
58       -verify filename
59           verify the signature using the the public key in "filename".  The
60           output is either "Verification OK" or "Verification Failure".
61
62       -prverify filename
63           verify the signature using the  the private key in "filename".
64
65       -signature filename
66           the actual signature to verify.
67
68       -hmac key
69           create a hashed MAC using "key".
70
71       -mac alg
72           create MAC (keyed Message Authentication Code). The most popular
73           MAC algorithm is HMAC (hash-based MAC), but there are other MAC
74           algorithms which are not based on hash, for instance gost-mac
75           algorithm, supported by ccgost engine. MAC keys and other options
76           should be set via -macopt parameter.
77
78       -macopt nm:v
79           Passes options to MAC algorithm, specified by -mac key.  Following
80           options are supported by both by HMAC and gost-mac:
81
82           key:string
83                   Specifies MAC key as alphnumeric string (use if key contain
84                   printable characters only). String length must conform to
85                   any restrictions of the MAC algorithm for example exactly
86                   32 chars for gost-mac.
87
88           hexkey:string
89                   Specifies MAC key in hexadecimal form (two hex digits per
90                   byte).  Key length must conform to any restrictions of the
91                   MAC algorithm for example exactly 32 chars for gost-mac.
92
93       -rand file(s)
94           a file or files containing random data used to seed the random
95           number generator, or an EGD socket (see RAND_egd(3)).  Multiple
96           files can be specified separated by a OS-dependent character.  The
97           separator is ; for MS-Windows, , for OpenVMS, and : for all others.
98
99       file...
100           file or files to digest. If no files are specified then standard
101           input is used.
102

NOTES

104       The digest of choice for all new applications is SHA1. Other digests
105       are however still widely used.
106
107       If you wish to sign or verify data using the DSA algorithm then the
108       dss1 digest must be used.
109
110       A source of random numbers is required for certain signing algorithms,
111       in particular DSA.
112
113       The signing and verify options should only be used if a single file is
114       being signed or verified.
115
116
117
1181.0.0e                            2009-04-10                           DGST(1)
Impressum