dsaparam(1) - phpMan

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DSAPARAM(1)                         OpenSSL                        DSAPARAM(1)



NAME
       dsaparam - DSA parameter manipulation and generation

SYNOPSIS
       openssl dsaparam [-inform DER|PEM] [-outform DER|PEM] [-in filename] [-out
       filename] [-noout] [-text] [-C] [-rand file(s)] [-genkey] [-engine id] [numbits]

DESCRIPTION
       This command is used to manipulate or generate DSA parameter files.

OPTIONS
       -inform DER|PEM
           This specifies the input format. The DER option uses an ASN1 DER encoded form
           compatible with RFC2459 (PKIX) DSS-Parms that is a SEQUENCE consisting of p, q
           and g respectively. The PEM form is the default format: it consists of the DER
           format base64 encoded with additional header and footer lines.

       -outform DER|PEM
           This specifies the output format, the options have the same meaning as the
           -inform option.

       -in filename
           This specifies the input filename to read parameters from or standard input if
           this option is not specified. If the numbits parameter is included then this
           option will be ignored.

       -out filename
           This specifies the output filename parameters to. Standard output is used if
           this option is not present. The output filename should not be the same as the
           input filename.

       -noout
           this option inhibits the output of the encoded version of the parameters.

       -text
           this option prints out the DSA parameters in human readable form.

       -C  this option converts the parameters into C code. The parameters can then be
           loaded by calling the get_dsaXXX() function.

       -genkey
           this option will generate a DSA either using the specified or generated
           parameters.

       -rand file(s)
           a file or files containing random data used to seed the random number
           generator, or an EGD socket (see RAND_egd(3)).  Multiple files can be specified
           separated by a OS-dependent character.  The separator is ; for MS-Windows, ,
           for OpenVMS, and : for all others.

       numbits
           this option specifies that a parameter set should be generated of size numbits.
           It must be the last option. If this option is included then the input file (if
           any) is ignored.

       -engine id
           specifying an engine (by its unique id string) will cause dsaparam to attempt
           to obtain a functional reference to the specified engine, thus initialising it
           if needed. The engine will then be set as the default for all available
           algorithms.

NOTES
       PEM format DSA parameters use the header and footer lines:

        -----BEGIN DSA PARAMETERS-----
        -----END DSA PARAMETERS-----

       DSA parameter generation is a slow process and as a result the same set of DSA
       parameters is often used to generate several distinct keys.

SEE ALSO
       gendsa(1), dsa(1), genrsa(1), rsa(1)



1.0.1e                            2013-02-11                       DSAPARAM(1)

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