324 lines
10 KiB
Plaintext
324 lines
10 KiB
Plaintext
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.\" ========================================================================
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.\"
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.IX Title "OPENSSL-DSA 1ossl"
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.TH OPENSSL-DSA 1ossl "2024-03-21" "3.2.1" "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\-dsa \- DSA key processing
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.SH "SYNOPSIS"
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.IX Header "SYNOPSIS"
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\&\fBopenssl\fR \fBdsa\fR
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[\fB\-help\fR]
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[\fB\-inform\fR \fB\s-1DER\s0\fR|\fB\s-1PEM\s0\fR]
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[\fB\-outform\fR \fB\s-1DER\s0\fR|\fB\s-1PEM\s0\fR]
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[\fB\-in\fR \fIfilename\fR]
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[\fB\-passin\fR \fIarg\fR]
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[\fB\-out\fR \fIfilename\fR]
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[\fB\-passout\fR \fIarg\fR]
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[\fB\-aes128\fR]
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[\fB\-aes192\fR]
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[\fB\-aes256\fR]
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[\fB\-aria128\fR]
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[\fB\-aria192\fR]
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[\fB\-aria256\fR]
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[\fB\-camellia128\fR]
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[\fB\-camellia192\fR]
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[\fB\-camellia256\fR]
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[\fB\-des\fR]
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[\fB\-des3\fR]
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[\fB\-idea\fR]
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[\fB\-text\fR]
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[\fB\-noout\fR]
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[\fB\-modulus\fR]
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[\fB\-pubin\fR]
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[\fB\-pubout\fR]
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[\fB\-pvk\-strong\fR]
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[\fB\-pvk\-weak\fR]
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[\fB\-pvk\-none\fR]
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[\fB\-engine\fR \fIid\fR]
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[\fB\-provider\fR \fIname\fR]
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[\fB\-provider\-path\fR \fIpath\fR]
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[\fB\-propquery\fR \fIpropq\fR]
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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This command processes \s-1DSA\s0 keys. They can be converted between various
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forms and their components printed out. \fBNote\fR This command uses the
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traditional SSLeay compatible format for private key encryption: newer
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applications should use the more secure PKCS#8 format using the \fBpkcs8\fR
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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 out a usage message.
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.IP "\fB\-inform\fR \fB\s-1DER\s0\fR|\fB\s-1PEM\s0\fR" 4
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.IX Item "-inform DER|PEM"
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The key input format; unspecified by default.
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See \fIopenssl\-format\-options\fR\|(1) for details.
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.IP "\fB\-outform\fR \fB\s-1DER\s0\fR|\fB\s-1PEM\s0\fR" 4
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.IX Item "-outform DER|PEM"
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The key output format; the default is \fB\s-1PEM\s0\fR.
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See \fIopenssl\-format\-options\fR\|(1) for details.
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.Sp
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Private keys are a sequence of \fB\s-1ASN.1 INTEGERS\s0\fR: the version (zero), \fBp\fR,
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\&\fBq\fR, \fBg\fR, and the public and private key components. Public keys
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are a \fBSubjectPublicKeyInfo\fR structure with the \fB\s-1DSA\s0\fR type.
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.Sp
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The \fB\s-1PEM\s0\fR format also accepts PKCS#8 data.
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.IP "\fB\-in\fR \fIfilename\fR" 4
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.IX Item "-in filename"
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This specifies the input filename to read a key from or standard input if this
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option is not specified. If the key is encrypted a pass phrase will be
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prompted for.
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.IP "\fB\-out\fR \fIfilename\fR" 4
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.IX Item "-out filename"
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This specifies the output filename to write a key to or standard output by
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is not specified. If any encryption options are set then a pass phrase will be
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prompted for. The output filename should \fBnot\fR be the same as the input
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filename.
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.IP "\fB\-passin\fR \fIarg\fR, \fB\-passout\fR \fIarg\fR" 4
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.IX Item "-passin arg, -passout arg"
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The password source for the input and output file.
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For more information about the format of \fBarg\fR
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see \fIopenssl\-passphrase\-options\fR\|(1).
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.IP "\fB\-aes128\fR, \fB\-aes192\fR, \fB\-aes256\fR, \fB\-aria128\fR, \fB\-aria192\fR, \fB\-aria256\fR, \fB\-camellia128\fR, \fB\-camellia192\fR, \fB\-camellia256\fR, \fB\-des\fR, \fB\-des3\fR, \fB\-idea\fR" 4
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.IX Item "-aes128, -aes192, -aes256, -aria128, -aria192, -aria256, -camellia128, -camellia192, -camellia256, -des, -des3, -idea"
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These options encrypt the private key with the specified
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cipher before outputting it. A pass phrase is prompted for.
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If none of these options is specified the key is written in plain text. This
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means that this command can be used to remove the pass phrase from a key
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by not giving any encryption option is given, or to add or change the pass
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phrase by setting them.
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These options can only be used with \s-1PEM\s0 format output files.
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.IP "\fB\-text\fR" 4
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.IX Item "-text"
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Prints out the public, private key components and parameters.
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.IP "\fB\-noout\fR" 4
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.IX Item "-noout"
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This option prevents output of the encoded version of the key.
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.IP "\fB\-modulus\fR" 4
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.IX Item "-modulus"
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This option prints out the value of the public key component of the key.
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.IP "\fB\-pubin\fR" 4
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.IX Item "-pubin"
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By default, a private key is read from the input.
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With this option a public key is read instead.
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If the input contains no public key but a private key, its public part is used.
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.IP "\fB\-pubout\fR" 4
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.IX Item "-pubout"
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By default, a private key is output. With this option a public
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key will be output instead. This option is automatically set if the input is
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a public key.
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.IP "\fB\-pvk\-strong\fR" 4
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.IX Item "-pvk-strong"
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Enable 'Strong' \s-1PVK\s0 encoding level (default).
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.IP "\fB\-pvk\-weak\fR" 4
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.IX Item "-pvk-weak"
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Enable 'Weak' \s-1PVK\s0 encoding level.
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.IP "\fB\-pvk\-none\fR" 4
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.IX Item "-pvk-none"
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Don't enforce \s-1PVK\s0 encoding.
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.IP "\fB\-engine\fR \fIid\fR" 4
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.IX Item "-engine id"
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See \*(L"Engine Options\*(R" in \fIopenssl\fR\|(1).
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This option is deprecated.
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.IP "\fB\-provider\fR \fIname\fR" 4
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.IX Item "-provider name"
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.PD 0
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.IP "\fB\-provider\-path\fR \fIpath\fR" 4
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.IX Item "-provider-path path"
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.IP "\fB\-propquery\fR \fIpropq\fR" 4
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.IX Item "-propquery propq"
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.PD
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See \*(L"Provider Options\*(R" in \fIopenssl\fR\|(1), \fIprovider\fR\|(7), and \fIproperty\fR\|(7).
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.PP
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The \fIopenssl\-pkey\fR\|(1) command is capable of performing all the operations
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this command can, as well as supporting other public key types.
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.SH "EXAMPLES"
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.IX Header "EXAMPLES"
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The documentation for the \fIopenssl\-pkey\fR\|(1) command contains examples
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equivalent to the ones listed here.
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.PP
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To remove the pass phrase on a \s-1DSA\s0 private key:
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.PP
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.Vb 1
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\& openssl dsa \-in key.pem \-out keyout.pem
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.Ve
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.PP
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To encrypt a private key using triple \s-1DES:\s0
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.PP
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.Vb 1
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\& openssl dsa \-in key.pem \-des3 \-out keyout.pem
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.Ve
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.PP
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To convert a private key from \s-1PEM\s0 to \s-1DER\s0 format:
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.PP
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.Vb 1
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\& openssl dsa \-in key.pem \-outform DER \-out keyout.der
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.Ve
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.PP
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To print out the components of a private key to standard output:
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.PP
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.Vb 1
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\& openssl dsa \-in key.pem \-text \-noout
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.Ve
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.PP
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To just output the public part of a private key:
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.PP
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.Vb 1
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\& openssl dsa \-in key.pem \-pubout \-out pubkey.pem
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.Ve
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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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\&\fIopenssl\-pkey\fR\|(1),
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\&\fIopenssl\-dsaparam\fR\|(1),
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\&\fIopenssl\-gendsa\fR\|(1),
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\&\fIopenssl\-rsa\fR\|(1),
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\&\fIopenssl\-genrsa\fR\|(1)
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.SH "HISTORY"
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.IX Header "HISTORY"
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The \fB\-engine\fR option was deprecated in OpenSSL 3.0.
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.SH "COPYRIGHT"
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.IX Header "COPYRIGHT"
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Copyright 2000\-2023 The OpenSSL Project Authors. All Rights Reserved.
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.PP
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Licensed under the Apache License 2.0 (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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