88 lines
1.8 KiB
Plaintext
88 lines
1.8 KiB
Plaintext
=pod
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=head1 NAME
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dh - DH parameter manipulation and generation
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=head1 SYNOPSIS
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B<openssl dh>
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[B<-inform DER|PEM>]
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[B<-outform DER|PEM>]
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[B<-in filename>]
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[B<-out filename>]
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[B<-noout>]
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[B<-text>]
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[B<-C>]
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=head1 DESCRIPTION
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This command is used to manipulate DH parameter files.
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=head1 OPTIONS
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=over 4
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=item B<-inform DER|PEM>
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This specifies the input format. The B<DER> option uses an ASN1 DER encoded
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form compatible with the PKCS#3 DHparameter structure. The PEM form is the
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default format: it consists of the B<DER> format base64 encoded with
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additional header and footer lines.
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=item B<-outform DER|PEM>
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This specifies the output format, the options have the same meaning as the
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B<-inform> option.
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=item B<-in filename>
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This specifies the input filename to read parameters from or standard input if
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this option is not specified.
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=item B<-out filename>
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This specifies the output filename parameters to. Standard output is used
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if this option is not present. The output filename should B<not> be the same
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as the input filename.
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=item B<-noout>
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this option inhibits the output of the encoded version of the parameters.
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=item B<-text>
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this option prints out the DH parameters in human readable form.
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=item B<-C>
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this option converts the parameters into C code. The parameters can then
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be loaded by calling the B<get_dhXXX()> function.
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=back
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=head1 NOTES
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PEM format DH parameters use the header and footer lines:
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-----BEGIN DH PARAMETERS-----
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-----END DH PARAMETERS-----
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OpenSSL currently only supports the older PKCS#3 DH, not the newer X9.42
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DH.
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This program manipulates DH parameters not keys.
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=head1 BUGS
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This program is badly named: the B<rsa> and B<dsa> programs manipulate keys
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and not parameters.
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There should be a way to generate and manipulate DH keys.
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=head1 SEE ALSO
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dsaparam(1)
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=cut
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