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@@ -8,12 +8,12 @@ openssl-ec - EC key processing
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B<openssl> B<ec>
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[B<-help>]
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[B<-inform PEM|DER>]
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[B<-outform PEM|DER>]
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[B<-in filename>]
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[B<-passin arg>]
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[B<-out filename>]
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[B<-passout arg>]
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[B<-inform> B<DER>|B<PEM>]
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[B<-outform> B<DER>|B<PEM>]
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[B<-in> I<filename>]
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[B<-passin> I<arg>]
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[B<-out> I<filename>]
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[B<-passout> I<arg>]
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[B<-des>]
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[B<-des3>]
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[B<-idea>]
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@@ -22,19 +22,21 @@ B<openssl> B<ec>
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[B<-param_out>]
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[B<-pubin>]
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[B<-pubout>]
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[B<-conv_form arg>]
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[B<-param_enc arg>]
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[B<-conv_form> I<arg>]
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[B<-param_enc> I<arg>]
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[B<-no_public>]
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[B<-check>]
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[B<-engine id>]
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[B<-engine> I<id>]
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=for openssl ifdef engine
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=head1 DESCRIPTION
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The B<ec> command processes EC keys. They can be converted between various
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forms and their components printed out. B<Note> OpenSSL uses the
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The L<openssl-ec(1)> command processes EC keys. They can be converted between
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various forms and their components printed out. B<Note> OpenSSL uses the
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private key format specified in 'SEC 1: Elliptic Curve Cryptography'
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(http://www.secg.org/). To convert an OpenSSL EC private key into the
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PKCS#8 private key format use the B<pkcs8> command.
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PKCS#8 private key format use the L<openssl-pkcs8(1)> command.
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=head1 OPTIONS
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@@ -44,7 +46,7 @@ PKCS#8 private key format use the B<pkcs8> command.
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Print out a usage message.
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=item B<-inform DER|PEM>
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=item B<-inform> B<DER>|B<PEM>
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This specifies the input format. The B<DER> option with a private key uses
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an ASN.1 DER encoded SEC1 private key. When used with a public key it
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@@ -53,41 +55,37 @@ The B<PEM> form is the default format: it consists of the B<DER> format base64
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encoded with additional header and footer lines. In the case of a private key
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PKCS#8 format is also accepted.
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=item B<-outform DER|PEM>
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=item B<-outform> B<DER>|B<PEM>
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This specifies the output format, the options have the same meaning and default
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as the B<-inform> option.
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=item B<-in filename>
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=item B<-in> I<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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=item B<-passin arg>
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The input file password source. For more information about the format of B<arg>
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see the B<PASS PHRASE ARGUMENTS> section in L<openssl(1)>.
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=item B<-out filename>
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=item B<-out> I<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 B<not> be the same as the input
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filename.
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=item B<-passout arg>
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=item B<-passin> I<arg>, B<-passout> I<arg>
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The output file password source. For more information about the format of B<arg>
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see the B<PASS PHRASE ARGUMENTS> section in L<openssl(1)>.
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The password source for the input and output file.
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For more information about the format of B<arg>
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see L<openssl(1)/Pass Phrase Options>.
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=item B<-des|-des3|-idea>
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=item B<-des>|B<-des3>|B<-idea>
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These options encrypt the private key with the DES, triple DES, IDEA or
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any other cipher supported by OpenSSL before outputting it. A pass phrase is
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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 using the B<ec> utility to read in an encrypted key with no
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means that using this command to read in an encrypted key with no
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encryption option can be used to remove the pass phrase from a key, or by
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setting the encryption options it can be use to add or change the pass phrase.
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These options can only be used with PEM format output files.
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@@ -111,7 +109,7 @@ 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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=item B<-conv_form>
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=item B<-conv_form> I<arg>
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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: B<compressed> (the default
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@@ -121,7 +119,7 @@ B<Note> Due to patent issues the B<compressed> 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 B<OPENSSL_EC_BIN_PT_COMP> at compile time.
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=item B<-param_enc arg>
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=item B<-param_enc> I<arg>
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This specifies how the elliptic curve parameters are encoded.
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Possible value are: B<named_curve>, i.e. the ec parameters are
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@@ -139,9 +137,9 @@ This option omits the public key components from the private key output.
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This option checks the consistency of an EC private or public key.
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=item B<-engine id>
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=item B<-engine> I<id>
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Specifying an engine (by its unique B<id> string) will cause B<ec>
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Specifying an engine (by its unique I<id> string) will cause this command
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to attempt to obtain a functional reference to the specified engine,
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thus initialising it if needed. The engine will then be set as the default
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for all available algorithms.
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