264 lines
9.0 KiB
Groff
264 lines
9.0 KiB
Groff
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.\" ========================================================================
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.\"
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.IX Title "OPENSSL-MAC 1"
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.TH OPENSSL-MAC 1 "2020-03-02" "3.0.0-dev" "OpenSSL"
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.\" For nroff, turn off justification. Always turn off hyphenation; it makes
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.\" way too many mistakes in technical documents.
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.if n .ad l
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.nh
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.SH "NAME"
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openssl\-mac \- perform Message Authentication Code operations
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.SH "SYNOPSIS"
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.IX Header "SYNOPSIS"
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\&\fBopenssl mac\fR
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[\fB\-help\fR]
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[\fB\-macopt\fR]
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[\fB\-in\fR \fIfilename\fR]
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[\fB\-out\fR \fIfilename\fR]
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[\fB\-binary\fR]
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\&\fImac_name\fR
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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The message authentication code functions output the \s-1MAC\s0 of a supplied input
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file.
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.SH "OPTIONS"
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.IX Header "OPTIONS"
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.IP "\fB\-help\fR" 4
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.IX Item "-help"
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Print a usage message.
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.IP "\fB\-in\fR \fIfilename\fR" 4
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.IX Item "-in filename"
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Input filename to calculate a \s-1MAC\s0 for, or standard input by default.
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Standard input is used if the filename is '\-'.
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Files are expected to be in binary format, standard input uses hexadecimal text
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format.
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.IP "\fB\-out\fR \fIfilename\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\-binary\fR" 4
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.IX Item "-binary"
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Output the \s-1MAC\s0 in binary form. Uses hexadecimal text format if not specified.
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.IP "\fB\-macopt\fR \fInm\fR:\fIv\fR" 4
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.IX Item "-macopt nm:v"
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Passes options to the \s-1MAC\s0 algorithm.
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A comprehensive list of controls can be found in the \s-1EVP_MAC\s0 implementation
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documentation.
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Common parameter names used by \fIEVP_MAC_CTX_get_params()\fR are:
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.RS 4
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.IP "\fBkey:\fR\fIstring\fR" 4
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.IX Item "key:string"
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Specifies the \s-1MAC\s0 key as an alphanumeric string (use if the key contains
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printable characters only).
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The string length must conform to any restrictions of the \s-1MAC\s0 algorithm.
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A key must be specified for every \s-1MAC\s0 algorithm.
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.IP "\fBhexkey:\fR\fIstring\fR" 4
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.IX Item "hexkey:string"
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Specifies the \s-1MAC\s0 key in hexadecimal form (two hex digits per byte).
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The key length must conform to any restrictions of the \s-1MAC\s0 algorithm.
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A key must be specified for every \s-1MAC\s0 algorithm.
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.IP "\fBdigest:\fR\fIstring\fR" 4
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.IX Item "digest:string"
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Used by \s-1HMAC\s0 as an alphanumeric string (use if the key contains printable
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characters only).
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The string length must conform to any restrictions of the \s-1MAC\s0 algorithm.
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To see the list of supported digests, use \f(CW\*(C`openssl list \-digest\-commands\*(C'\fR.
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.IP "\fBcipher:\fR\fIstring\fR" 4
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.IX Item "cipher:string"
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Used by \s-1CMAC\s0 and \s-1GMAC\s0 to specify the cipher algorithm.
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For \s-1CMAC\s0 it must be one of \s-1AES\-128\-CBC\s0, \s-1AES\-192\-CBC\s0, \s-1AES\-256\-CBC\s0 or
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\&\s-1DES\-EDE3\-CBC\s0.
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For \s-1GMAC\s0 it should be a \s-1GCM\s0 mode cipher e.g. \s-1AES\-128\-GCM\s0.
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.IP "\fBiv:\fR\fIstring\fR" 4
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.IX Item "iv:string"
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Used by \s-1GMAC\s0 to specify an \s-1IV\s0 as an alphanumeric string (use if the \s-1IV\s0 contains
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printable characters only).
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.IP "\fBhexiv:\fR\fIstring\fR" 4
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.IX Item "hexiv:string"
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Used by \s-1GMAC\s0 to specify an \s-1IV\s0 in hexadecimal form (two hex digits per byte).
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.IP "\fBsize:\fR\fIint\fR" 4
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.IX Item "size:int"
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Used by \s-1KMAC128\s0 or \s-1KMAC256\s0 to specify an output length.
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The default sizes are 32 or 64 bytes respectively.
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.IP "\fBcustom:\fR\fIstring\fR" 4
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.IX Item "custom:string"
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Used by \s-1KMAC128\s0 or \s-1KMAC256\s0 to specify a customization string.
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The default is the empty string "".
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.RE
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.RS 4
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.RE
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.IP "\fImac_name\fR" 4
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.IX Item "mac_name"
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Specifies the name of a supported \s-1MAC\s0 algorithm which will be used.
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To see the list of supported \s-1MAC\s0's use the command \f(CW\*(C`opensssl list
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\&\-mac\-algorithms\*(C'\fR.
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.SH "EXAMPLES"
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.IX Header "EXAMPLES"
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To create a hex-encoded \s-1HMAC\-SHA1\s0 \s-1MAC\s0 of a file and write to stdout: \e
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openssl mac \-macopt digest:SHA1 \e
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\-macopt hexkey:000102030405060708090A0B0C0D0E0F10111213 \e
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\-in msg.bin \s-1HMAC\s0
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.PP
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To create a SipHash \s-1MAC\s0 from a file with a binary file output: \e
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openssl mac \-macopt hexkey:000102030405060708090A0B0C0D0E0F \e
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\-in msg.bin \-out out.bin \-binary SipHash
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.PP
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To create a hex-encoded \s-1CMAC\-AES\-128\-CBC\s0 \s-1MAC\s0 from a file:\e
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openssl mac \-macopt cipher:AES\-128\-CBC \e
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\-macopt hexkey:77A77FAF290C1FA30C683DF16BA7A77B \e
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\-in msg.bin \s-1CMAC\s0
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.PP
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To create a hex-encoded \s-1KMAC128\s0 \s-1MAC\s0 from a file with a Customisation String
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\&'Tag' and output length of 16: \e
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openssl mac \-macopt custom:Tag \-macopt hexkey:40414243444546 \e
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\-macopt size:16 \-in msg.bin \s-1KMAC128\s0
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.PP
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To create a hex-encoded \s-1GMAC\-AES\-128\-GCM\s0 with a \s-1IV\s0 from a file: \e
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openssl mac \-macopt cipher:AES\-128\-GCM \-macopt hexiv:E0E00F19FED7BA0136A797F3 \e
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\-macopt hexkey:77A77FAF290C1FA30C683DF16BA7A77B \-in msg.bin \s-1GMAC\s0
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.SH "NOTES"
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.IX Header "NOTES"
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The \s-1MAC\s0 mechanisms that are available will depend on the options
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used when building OpenSSL.
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Use \f(CW\*(C`openssl list \-mac\-algorithms\*(C'\fR to list them.
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.SH "SEE ALSO"
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.IX Header "SEE ALSO"
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\&\fIopenssl\fR\|(1),
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\&\s-1\fIEVP_MAC\s0\fR\|(3),
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\&\s-1\fIEVP_MAC\-CMAC\s0\fR\|(7),
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\&\s-1\fIEVP_MAC\-GMAC\s0\fR\|(7),
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\&\s-1\fIEVP_MAC\-HMAC\s0\fR\|(7),
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\&\s-1\fIEVP_MAC\-KMAC\s0\fR\|(7),
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\&\fIEVP_MAC\-Siphash\fR\|(7),
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\&\fIEVP_MAC\-Poly1305\fR\|(7)
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.SH "COPYRIGHT"
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.IX Header "COPYRIGHT"
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Copyright 2018\-2019 The OpenSSL Project Authors. All Rights Reserved.
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.PP
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Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file \s-1LICENSE\s0 in the source distribution or at
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<https://www.openssl.org/source/license.html>.
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