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Title "DSAPARAM 1" For nroff, turn off justification. Always turn off hyphenation; it makes
way too many mistakes in technical documents.
dsaparam - DSA parameter manipulation and generation Header "SYNOPSIS" \fBopenssl dsaparam [-inform DER|PEM] [-outform DER|PEM] [-in filename] [-out filename] [-noout] [-text] [-C] [-rand file(s)] [-genkey] [-engine id] [numbits] Header "DESCRIPTION" This command is used to manipulate or generate \s-1DSA\s0 parameter files. Header "OPTIONS" Item "-inform DER|PEM" This specifies the input format. The \s-1DER\s0 option uses an \s-1ASN1 DER\s0 encoded form compatible with \s-1RFC2459 \s0(\s-1PKIX\s0) DSS-Parms that is a \s-1SEQUENCE\s0 consisting of p, q and g respectively. The \s-1PEM\s0 form is the default format: it consists of the \s-1DER\s0 format base64 encoded with additional header and footer lines. Item "-outform DER|PEM" This specifies the output format, the options have the same meaning as the \fB-inform option. Item "-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. Item "-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. Item "-noout" this option inhibits the output of the encoded version of the parameters. Item "-text" this option prints out the \s-1DSA\s0 parameters in human readable form. Item "-C" this option converts the parameters into C code. The parameters can then be loaded by calling the \f(BIget_dsaXXX() function. Item "-genkey" this option will generate a \s-1DSA\s0 either using the specified or generated parameters. Item "-rand file(s)" a file or files containing random data used to seed the random number generator, or an \s-1EGD\s0 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. Item "numbits" this option specifies that a parameter set should be generated of size \fBnumbits. It must be the last option. If this option is included then the input file (if any) is ignored. Item "-engine id" specifying an engine (by it's unique id string) will cause req 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. Header "NOTES" \s-1PEM\s0 format \s-1DSA\s0 parameters use the header and footer lines:

.Vb 2 -----BEGIN DSA PARAMETERS----- -----END DSA PARAMETERS----- .Ve

\s-1DSA\s0 parameter generation is a slow process and as a result the same set of \s-1DSA\s0 parameters is often used to generate several distinct keys.

Header "SEE ALSO" \fIgendsa\|(1), dsa\|(1), genrsa\|(1), \fIrsa\|(1)