| java.security.interfaces.DSAKeyPairGenerator
All known Subclasses: sun.security.provider.DSAKeyPairGenerator,
| DSAKeyPairGenerator | | public interface DSAKeyPairGenerator (Code) | | An interface to an object capable of generating DSA key pairs.
The initialize methods may each be called any number
of times. If no initialize method is called on a
DSAKeyPairGenerator, the default is to generate 1024-bit keys, using
precomputed p, q and g parameters and an instance of SecureRandom as
the random bit source.
Users wishing to indicate DSA-specific parameters, and to generate a key
pair suitable for use with the DSA algorithm typically
- Get a key pair generator for the DSA algorithm by calling the
KeyPairGenerator
getInstance method with "DSA"
as its argument.
- Initialize the generator by casting the result to a DSAKeyPairGenerator
and calling one of the
initialize methods from this DSAKeyPairGenerator interface.
- Generate a key pair by calling the
generateKeyPair
method from the KeyPairGenerator class.
Note: it is not always necessary to do do algorithm-specific
initialization for a DSA key pair generator. That is, it is not always
necessary to call an initialize method in this interface.
Algorithm-independent initialization using the initialize method
in the KeyPairGenerator
interface is all that is needed when you accept defaults for algorithm-specific
parameters.
See Also: java.security.KeyPairGenerator |
| Method Summary | |
| public void | initialize(DSAParams params, SecureRandom random)
Initializes the key pair generator using p, q and g, the DSA
family parameters. | | public void | initialize(int modlen, boolean genParams, SecureRandom random)
Initializes the key pair generator for a given modulus length,
without parameters. |
| initialize | | public void initialize(DSAParams params, SecureRandom random) throws InvalidParameterException(Code) | | Initializes the key pair generator using p, q and g, the DSA
family parameters.
Parameters:
params - the parameters to use to generate the keys.
Parameters:
random - the random bit source to use to generate key bits.
exception:
InvalidParameterException - if the parameters passed areinvalid or null. |
| initialize | | public void initialize(int modlen, boolean genParams, SecureRandom random) throws InvalidParameterException(Code) | | Initializes the key pair generator for a given modulus length,
without parameters.
If genParams is true, this method will generate new
p, q and g parameters. If it is false, the method will use precomputed
parameters for the modulus length requested. If there are no
precomputed parameters for that modulus length, an exception will be
thrown. It is guaranteed that there will always be
default parameters for modulus lengths of 512 and 1024 bits.
Parameters:
modlen - the modulus length, in bits. Valid values are anymultiple of 8 between 512 and 1024, inclusive.
Parameters:
random - the random bit source to use to generate key bits.
Parameters:
genParams - whether or not to generate new parameters forthe modulus length requested.
exception:
InvalidParameterException - if the modulus length is notbetween 512 and 1024, or if genParams is false and there arenot precomputed parameters for the modulus length requested. |
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