228 lines
6.6 KiB
Groff
228 lines
6.6 KiB
Groff
.\" $NetBSD: openssl_dgst.1,v 1.4 2001/04/12 10:45:47 itojun Exp $
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.\" ======================================================================
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.\"
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.IX Title "DGST 1"
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.TH DGST 1 "0.9.6a" "2001-04-12" "OpenSSL"
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.UC
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.SH "NAME"
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dgst, md5, md4, md2, sha1, sha, mdc2, ripemd160 \- message digests
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.SH "LIBRARY"
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libcrypto, -lcrypto
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.SH "SYNOPSIS"
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.IX Header "SYNOPSIS"
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\&\fBopenssl\fR \fBdgst\fR
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[\fB\-md5|\-md4|\-md2|\-sha1|\-sha|\-mdc2|\-ripemd160|\-dss1\fR]
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[\fB\-c\fR]
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[\fB\-d\fR]
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[\fB\-hex\fR]
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[\fB\-binary\fR]
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[\fB\-out filename\fR]
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[\fB\-sign filename\fR]
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[\fB\-verify filename\fR]
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[\fB\-prverify filename\fR]
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[\fB\-signature filename\fR]
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[\fBfile...\fR]
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.PP
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[\fBmd5|md4|md2|sha1|sha|mdc2|ripemd160\fR]
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[\fB\-c\fR]
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[\fB\-d\fR]
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[\fBfile...\fR]
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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The digest functions output the message digest of a supplied file or files
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in hexadecimal form. They can also be used for digital signing and verification.
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.SH "OPTIONS"
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.IX Header "OPTIONS"
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.Ip "\fB\-c\fR" 4
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.IX Item "-c"
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print out the digest in two digit groups separated by colons, only relevant if
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\&\fBhex\fR format output is used.
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.Ip "\fB\-d\fR" 4
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.IX Item "-d"
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print out \s-1BIO\s0 debugging information.
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.Ip "\fB\-hex\fR" 4
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.IX Item "-hex"
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digest is to be output as a hex dump. This is the default case for a \*(L"normal\*(R"
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digest as opposed to a digital signature.
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.Ip "\fB\-binary\fR" 4
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.IX Item "-binary"
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output the digest or signature in binary form.
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.Ip "\fB\-out filename\fR" 4
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.IX Item "-out filename"
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filename to output to, or standard output by default.
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.Ip "\fB\-sign filename\fR" 4
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.IX Item "-sign filename"
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digitally sign the digest using the private key in \*(L"filename\*(R".
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.Ip "\fB\-verify filename\fR" 4
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.IX Item "-verify filename"
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verify the signature using the the public key in \*(L"filename\*(R".
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The output is either \*(L"Verification \s-1OK\s0\*(R" or \*(L"Verification Failure\*(R".
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.Ip "\fB\-prverify filename\fR" 4
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.IX Item "-prverify filename"
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verify the signature using the the private key in \*(L"filename\*(R".
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.Ip "\fB\-signature filename\fR" 4
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.IX Item "-signature filename"
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the actual signature to verify.
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.Ip "\fB\-rand \f(BIfile\fB\|(s)\fR" 4
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.IX Item "-rand file"
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a file or files containing random data used to seed the random number
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generator, or an \s-1EGD\s0 socket (see RAND_egd(3)).
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Multiple files can be specified separated by a OS-dependent character.
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The separator is \fB;\fR for MS-Windows, \fB,\fR for OpenVMS, and \fB:\fR for
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all others.
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.Ip "\fBfile...\fR" 4
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.IX Item "file..."
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file or files to digest. If no files are specified then standard input is
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used.
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.SH "NOTES"
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.IX Header "NOTES"
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The digest of choice for all new applications is \s-1SHA1\s0. Other digests are
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however still widely used.
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.PP
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If you wish to sign or verify data using the \s-1DSA\s0 algorithm then the dss1
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digest must be used.
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.PP
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A source of random numbers is required for certain signing algorithms, in
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particular \s-1DSA\s0.
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.PP
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The signing and verify options should only be used if a single file is
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being signed or verified.
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