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**Known Implementing Classes:**- DSSKeyPairGeneratorSpi

`public interface `**DSAKeyPairGenerator**

This interface contains methods for intializing a Digital Signature
Algorithm key generation engine. The initialize methods may be called
any number of times. If no explicity initialization call is made, then
the engine defaults to generating 1024-bit keys using pre-calculated
base, prime, and subprime values.

## Method Summary

`void`

`initialize(int modlen, boolean genParams, SecureRandom random)`

- Initializes the key generator to a give modulus.

`void`

`initialize(DSAParams params, SecureRandom random)`

- Initializes the key generator with the specified DSA parameters and random bit source

public void initialize(int modlen, boolean genParams, SecureRandom random) throws InvalidParameterException

Initializes the key generator to a give modulus. If the`genParams`

value is`true`

then new base, prime, and subprime values will be generated for the given modulus. If not, the pre-calculated values will be used. If no pre-calculated values exist for the specified modulus, an exception will be thrown. It is guaranteed that there will always be pre-calculated values for all modulus values between 512 and 1024 bits inclusives.

Parameters:`modlen`

- The modulus length`genParams`

-`true`

to generate new DSA parameters,`false`

otherwise`random`

- The random bit source to use

Throws:`InvalidParameterException`

- If a parameter is invalid

public void initialize(DSAParams params, SecureRandom random) throws InvalidParameterException

Initializes the key generator with the specified DSA parameters and random bit source

Parameters:`params`

- The DSA parameters to use`random`

- The random bit source to use

Throws:`InvalidParameterException`

- If the parameters passed are not valid

DSAKeyPairGenerator.java -- Initialize a DSA key generator
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