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Class sun.security.jsafe.DSA

java.lang.Object
   |
   +----java.security.Signature
           |
           +----sun.security.jsafe.JSafeSig
                   |
                   +----sun.security.jsafe.DSA

public final class DSA

extends JSafeSig

DSA()

Default constructor.

checkKeyAlg(AlgorithmId)

Returns true if the key algorithm is one supported by this signature algorithm.

getKeyGen()

Returns a key generator object for the key algorithm which was previously checked by checkKeyAlgorithm and stored in the "keyAlg" member.

initSign(long)

Initialize the BSAFE algorithm object "algObj" to do SHA1-with-DSA signing, using private key "keyObj".

initVerify(long)

Initialize the BSAFE algorithm object "algObj" to do SHA1-with-DSA signature verificateion, using public key "keyObj".

parsePrivateKey(byte[], String)

Parses DSA private keys usin an algorithm-specific format.

  public DSA()

Default constructor. Establishes the signature algorithm to be used.

  protected boolean checkKeyAlg(AlgorithmId keyAlg)

Returns true if the key algorithm is one supported by this signature algorithm. Side effect: sets "siglimit" according to the size of the signature generated with this algorithm and using this kind of key. XXX The side effect's a bit of a crock ... for DSA, BSAFE defines it as a fixed value of 48. RSA needs an explcit check with a key, not the algorithm.

Overrides:

checkKeyAlg in class JSafeSig

  protected KeyGen getKeyGen()

Returns a key generator object for the key algorithm which was previously checked by checkKeyAlgorithm and stored in the "keyAlg" member.

Overrides:

getKeyGen in class JSafeSig

  protected void initSign(long keyObj)

Initialize the BSAFE algorithm object "algObj" to do SHA1-with-DSA signing, using private key "keyObj".

Overrides:

initSign in class JSafeSig

  protected void initVerify(long keyObj)

Initialize the BSAFE algorithm object "algObj" to do SHA1-with-DSA signature verificateion, using public key "keyObj".

Overrides:

initVerify in class JSafeSig

  protected void parsePrivateKey(byte privateKey[],
                                 String format) throws InvalidKeyException

Parses DSA private keys usin an algorithm-specific format. Private keys are stored in a different format than public ones, to minimize the risks associated with confusing the two.

Parameters:

privateKey - encoded bytes of the private key

format - the format of the key

Throws: InvalidKeyException

if an error is encountered when decoding the key, such as being given an illegal format key.

Overrides:

parsePrivateKey in class JSafeSig

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