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+=pod
+
+=begin comment
+{- join("\n", @autowarntext) -}
+
+=end comment
+
+=head1 NAME
+
+openssl-ec - EC key processing
+
+=head1 SYNOPSIS
+
+B<openssl> B<ec>
+[B<-help>]
+[B<-inform> B<DER>|B<PEM>|B<P12>|B<ENGINE>]
+[B<-outform> B<DER>|B<PEM>]
+[B<-in> I<filename>|I<uri>]
+[B<-passin> I<arg>]
+[B<-out> I<filename>]
+[B<-passout> I<arg>]
+[B<-des>]
+[B<-des3>]
+[B<-idea>]
+[B<-text>]
+[B<-noout>]
+[B<-param_out>]
+[B<-pubin>]
+[B<-pubout>]
+[B<-conv_form> I<arg>]
+[B<-param_enc> I<arg>]
+[B<-no_public>]
+[B<-check>]
+{- $OpenSSL::safe::opt_engine_synopsis -}{- $OpenSSL::safe::opt_provider_synopsis -}
+
+=head1 DESCRIPTION
+
+The L<openssl-ec(1)> command processes EC keys. They can be converted between
+various forms and their components printed out. B<Note> OpenSSL uses the
+private key format specified in 'SEC 1: Elliptic Curve Cryptography'
+(http://www.secg.org/). To convert an OpenSSL EC private key into the
+PKCS#8 private key format use the L<openssl-pkcs8(1)> command.
+
+=head1 OPTIONS
+
+=over 4
+
+=item B<-help>
+
+Print out a usage message.
+
+=item B<-inform> B<DER>|B<PEM>|B<P12>|B<ENGINE>
+
+The key input format; unspecified by default.
+See L<openssl-format-options(1)> for details.
+
+=item B<-outform> B<DER>|B<PEM>
+
+The key output format; the default is B<PEM>.
+See L<openssl-format-options(1)> for details.
+
+Private keys are an SEC1 private key or PKCS#8 format.
+Public keys are a B<SubjectPublicKeyInfo> as specified in IETF RFC 3280.
+
+=item B<-in> I<filename>|I<uri>
+
+This specifies the input to read a key from or standard input if this
+option is not specified. If the key is encrypted a pass phrase will be
+prompted for.
+
+=item B<-out> I<filename>
+
+This specifies the output filename to write a key to or standard output by
+is not specified. If any encryption options are set then a pass phrase will be
+prompted for. The output filename should B<not> be the same as the input
+filename.
+
+=item B<-passin> I<arg>, B<-passout> I<arg>
+
+The password source for the input and output file.
+For more information about the format of B<arg>
+see L<openssl-passphrase-options(1)>.
+
+=item B<-des>|B<-des3>|B<-idea>
+
+These options encrypt the private key with the DES, triple DES, IDEA or
+any other cipher supported by OpenSSL before outputting it. A pass phrase is
+prompted for.
+If none of these options is specified the key is written in plain text. This
+means that using this command to read in an encrypted key with no
+encryption option can be used to remove the pass phrase from a key, or by
+setting the encryption options it can be use to add or change the pass phrase.
+These options can only be used with PEM format output files.
+
+=item B<-text>
+
+Prints out the public, private key components and parameters.
+
+=item B<-noout>
+
+This option prevents output of the encoded version of the key.
+
+=item B<-param_out>
+
+Print the elliptic curve parameters.
+
+=item B<-pubin>
+
+By default, a private key is read from the input file. With this option a
+public key is read instead.
+
+=item B<-pubout>
+
+By default a private key is output. With this option a public
+key will be output instead. This option is automatically set if the input is
+a public key.
+
+=item B<-conv_form> I<arg>
+
+This specifies how the points on the elliptic curve are converted
+into octet strings. Possible values are: B<compressed>, B<uncompressed> (the
+default value) and B<hybrid>. For more information regarding
+the point conversion forms please read the X9.62 standard.
+B<Note> Due to patent issues the B<compressed> option is disabled
+by default for binary curves and can be enabled by defining
+the preprocessor macro B<OPENSSL_EC_BIN_PT_COMP> at compile time.
+
+=item B<-param_enc> I<arg>
+
+This specifies how the elliptic curve parameters are encoded.
+Possible value are: B<named_curve>, i.e. the ec parameters are
+specified by an OID, or B<explicit> where the ec parameters are
+explicitly given (see RFC 3279 for the definition of the
+EC parameters structures). The default value is B<named_curve>.
+B<Note> the B<implicitlyCA> alternative, as specified in RFC 3279,
+is currently not implemented in OpenSSL.
+
+=item B<-no_public>
+
+This option omits the public key components from the private key output.
+
+=item B<-check>
+
+This option checks the consistency of an EC private or public key.
+
+{- $OpenSSL::safe::opt_engine_item -}
+
+{- $OpenSSL::safe::opt_provider_item -}
+
+=back
+
+The L<openssl-pkey(1)> command is capable of performing all the operations
+this command can, as well as supporting other public key types.
+
+=head1 EXAMPLES
+
+The documentation for the L<openssl-pkey(1)> command contains examples
+equivalent to the ones listed here.
+
+To encrypt a private key using triple DES:
+
+ openssl ec -in key.pem -des3 -out keyout.pem
+
+To convert a private key from PEM to DER format:
+
+ openssl ec -in key.pem -outform DER -out keyout.der
+
+To print out the components of a private key to standard output:
+
+ openssl ec -in key.pem -text -noout
+
+To just output the public part of a private key:
+
+ openssl ec -in key.pem -pubout -out pubkey.pem
+
+To change the parameters encoding to B<explicit>:
+
+ openssl ec -in key.pem -param_enc explicit -out keyout.pem
+
+To change the point conversion form to B<compressed>:
+
+ openssl ec -in key.pem -conv_form compressed -out keyout.pem
+
+=head1 SEE ALSO
+
+L<openssl(1)>,
+L<openssl-pkey(1)>,
+L<openssl-ecparam(1)>,
+L<openssl-dsa(1)>,
+L<openssl-rsa(1)>
+
+=head1 HISTORY
+
+The B<-engine> option was deprecated in OpenSSL 3.0.
+
+The B<-conv_form> and B<-no_public> options are no longer supported
+with keys loaded from an engine in OpenSSL 3.0.
+
+=head1 COPYRIGHT
+
+Copyright 2003-2022 The OpenSSL Project Authors. All Rights Reserved.
+
+Licensed under the Apache License 2.0 (the "License").  You may not use
+this file except in compliance with the License.  You can obtain a copy
+in the file LICENSE in the source distribution or at
+L<https://www.openssl.org/source/license.html>.
+
+=cut