362 lines
12 KiB
Plaintext
362 lines
12 KiB
Plaintext
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.\" ========================================================================
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.\"
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.IX Title "OPENSSL-PKEY 1ossl"
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.TH OPENSSL-PKEY 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\-pkey \- public or private key processing command
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.SH "SYNOPSIS"
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.IX Header "SYNOPSIS"
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\&\fBopenssl\fR \fBpkey\fR
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[\fB\-help\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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[\fB\-check\fR]
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[\fB\-pubcheck\fR]
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[\fB\-in\fR \fIfilename\fR|\fIuri\fR]
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[\fB\-inform\fR \fB\s-1DER\s0\fR|\fB\s-1PEM\s0\fR|\fBP12\fR|\fB\s-1ENGINE\s0\fR]
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[\fB\-passin\fR \fIarg\fR]
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[\fB\-pubin\fR]
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[\fB\-out\fR \fIfilename\fR]
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[\fB\-outform\fR \fB\s-1DER\s0\fR|\fB\s-1PEM\s0\fR]
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[\fB\-\f(BIcipher\fB\fR]
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[\fB\-passout\fR \fIarg\fR]
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[\fB\-traditional\fR]
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[\fB\-pubout\fR]
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[\fB\-noout\fR]
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[\fB\-text\fR]
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[\fB\-text_pub\fR]
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[\fB\-ec_conv_form\fR \fIarg\fR]
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[\fB\-ec_param_enc\fR \fIarg\fR]
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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This command processes public or private keys. They can be
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converted between various forms and their components printed.
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.SH "OPTIONS"
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.IX Header "OPTIONS"
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.SS "General options"
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.IX Subsection "General 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\-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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.IP "\fB\-check\fR" 4
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.IX Item "-check"
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This option checks the consistency of a key pair for both public and private
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components.
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.IP "\fB\-pubcheck\fR" 4
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.IX Item "-pubcheck"
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This option checks the correctness of either a public key
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or the public component of a key pair.
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.SS "Input options"
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.IX Subsection "Input options"
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.IP "\fB\-in\fR \fIfilename\fR|\fIuri\fR" 4
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.IX Item "-in filename|uri"
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This specifies the input to read a key from
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or standard input if this option is not specified.
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If the key input is encrypted and \fB\-passin\fR is not given
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a pass phrase will be prompted for.
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.IP "\fB\-inform\fR \fB\s-1DER\s0\fR|\fB\s-1PEM\s0\fR|\fBP12\fR|\fB\s-1ENGINE\s0\fR" 4
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.IX Item "-inform DER|PEM|P12|ENGINE"
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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\-passin\fR \fIarg\fR" 4
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.IX Item "-passin arg"
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The password source for the key input.
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.Sp
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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\-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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.SS "Output options"
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.IX Subsection "Output options"
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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 save the encoded and/or text output of key
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or standard output if this option is not specified.
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If any cipher option is set but no \fB\-passout\fR is given
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then a pass phrase will be prompted for.
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The output filename should \fBnot\fR be the same as the input filename.
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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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.IP "\fB\-\f(BIcipher\fB\fR" 4
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.IX Item "-cipher"
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Encrypt the \s-1PEM\s0 encoded private key with the supplied cipher. Any algorithm
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name accepted by \fIEVP_get_cipherbyname()\fR is acceptable such as \fBaes128\fR.
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Encryption is not supported for \s-1DER\s0 output.
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.IP "\fB\-passout\fR \fIarg\fR" 4
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.IX Item "-passout arg"
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The password source for the output file.
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.Sp
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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\-traditional\fR" 4
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.IX Item "-traditional"
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|
Normally a private key is written using standard format: this is PKCS#8 form
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with the appropriate encryption algorithm (if any). If the \fB\-traditional\fR
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option is specified then the older \*(L"traditional\*(R" format is used instead.
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.IP "\fB\-pubout\fR" 4
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.IX Item "-pubout"
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By default the private and public key is output;
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this option restricts the output to the public components.
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This option is automatically set if the input is a public key.
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.Sp
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When combined with \fB\-text\fR, this is equivalent to \fB\-text_pub\fR.
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.IP "\fB\-noout\fR" 4
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.IX Item "-noout"
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Do not output the key in encoded form.
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.IP "\fB\-text\fR" 4
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.IX Item "-text"
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Output the various key components in plain text
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(possibly in addition to the \s-1PEM\s0 encoded form).
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This cannot be combined with encoded output in \s-1DER\s0 format.
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.IP "\fB\-text_pub\fR" 4
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.IX Item "-text_pub"
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Output in text form only the public key components (also for private keys).
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This cannot be combined with encoded output in \s-1DER\s0 format.
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.IP "\fB\-ec_conv_form\fR \fIarg\fR" 4
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.IX Item "-ec_conv_form arg"
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This option only applies to elliptic-curve based keys.
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.Sp
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This specifies how the points on the elliptic curve are converted
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into octet strings. Possible values are: \fBcompressed\fR (the default
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value), \fBuncompressed\fR and \fBhybrid\fR. For more information regarding
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the point conversion forms please read the X9.62 standard.
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\&\fBNote\fR Due to patent issues the \fBcompressed\fR option is disabled
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by default for binary curves and can be enabled by defining
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the preprocessor macro \fB\s-1OPENSSL_EC_BIN_PT_COMP\s0\fR at compile time.
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.IP "\fB\-ec_param_enc\fR \fIarg\fR" 4
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.IX Item "-ec_param_enc arg"
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This option only applies to elliptic curve based public and private keys.
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.Sp
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This specifies how the elliptic curve parameters are encoded.
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Possible value are: \fBnamed_curve\fR, i.e. the ec parameters are
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specified by an \s-1OID,\s0 or \fBexplicit\fR where the ec parameters are
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explicitly given (see \s-1RFC 3279\s0 for the definition of the
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\&\s-1EC\s0 parameters structures). The default value is \fBnamed_curve\fR.
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\&\fBNote\fR the \fBimplicitlyCA\fR alternative, as specified in \s-1RFC 3279,\s0
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is currently not implemented in OpenSSL.
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.SH "EXAMPLES"
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.IX Header "EXAMPLES"
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To remove the pass phrase on a private key:
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.PP
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.Vb 1
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\& openssl pkey \-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 pkey \-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 pkey \-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 pkey \-in key.pem \-text \-noout
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.Ve
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.PP
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To print out the public components of a private key to standard output:
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.PP
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.Vb 1
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\& openssl pkey \-in key.pem \-text_pub \-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 pkey \-in key.pem \-pubout \-out pubkey.pem
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.Ve
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.PP
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To change the \s-1EC\s0 parameters encoding to \fBexplicit\fR:
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.PP
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.Vb 1
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\& openssl pkey \-in key.pem \-ec_param_enc explicit \-out keyout.pem
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.Ve
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.PP
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To change the \s-1EC\s0 point conversion form to \fBcompressed\fR:
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.PP
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.Vb 1
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\& openssl pkey \-in key.pem \-ec_conv_form compressed \-out keyout.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\-genpkey\fR\|(1),
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\&\fIopenssl\-rsa\fR\|(1),
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\&\fIopenssl\-pkcs8\fR\|(1),
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\&\fIopenssl\-dsa\fR\|(1),
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\&\fIopenssl\-genrsa\fR\|(1),
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\&\fIopenssl\-gendsa\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 2006\-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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