Package org.bouncycastle.jcajce.provider.asymmetric.dsa

Class DSASigner

java.lang.Object
java.security.SignatureSpi
org.bouncycastle.jcajce.provider.asymmetric.dsa.DSASigner
All Implemented Interfaces:
PKCSObjectIdentifiers, X509ObjectIdentifiers
Direct Known Subclasses:
DSASigner.noneDSA, DSASigner.stdDSA
public class DSASigner
extends SignatureSpi
implements PKCSObjectIdentifiers, X509ObjectIdentifiers

  • Constructor Details

    • DSASigner

      protected DSASigner​(Digest digest, DSA signer)

  • Method Details

    • engineInitVerify

      protected void engineInitVerify​(PublicKey publicKey) throws InvalidKeyException
      Description copied from class: SignatureSpi
      Initializes this SignatureSpi instance for signature verification, using the public key of the identity whose signature is going to be verified.
      Specified by:
      engineInitVerify in class SignatureSpi
      Parameters:
      publicKey - the public key.
      Throws:
      InvalidKeyException - if publicKey is not valid.

    • engineInitSign

      protected void engineInitSign​(PrivateKey privateKey, SecureRandom random) throws InvalidKeyException
      Description copied from class: SignatureSpi
      Initializes this SignatureSpi instance for signing, using the private key of the identity whose signature is going to be generated and the specified source of randomness.
      Overrides:
      engineInitSign in class SignatureSpi
      Parameters:
      privateKey - the private key.
      random - the SecureRandom to use.
      Throws:
      InvalidKeyException - if privateKey is not valid.

    • engineInitSign

      protected void engineInitSign​(PrivateKey privateKey) throws InvalidKeyException
      Description copied from class: SignatureSpi
      Initializes this SignatureSpi instance for signing, using the private key of the identity whose signature is going to be generated.
      Specified by:
      engineInitSign in class SignatureSpi
      Parameters:
      privateKey - the private key.
      Throws:
      InvalidKeyException - if privateKey is not valid.

    • engineUpdate

      protected void engineUpdate​(byte b) throws SignatureException
      Description copied from class: SignatureSpi
      Updates the data to be verified or to be signed, using the specified byte.
      Specified by:
      engineUpdate in class SignatureSpi
      Parameters:
      b - the byte to update with.
      Throws:
      SignatureException - if this SignatureSpi instance is not initialized properly.

    • engineUpdate

      protected void engineUpdate​(byte[] b, int off, int len) throws SignatureException
      Description copied from class: SignatureSpi
      Updates the data to be verified or to be signed, using the given byte[], starting form the specified index for the specified length.
      Specified by:
      engineUpdate in class SignatureSpi
      Parameters:
      b - the byte array to update with.
      off - the start index in b of the data.
      len - the number of bytes to use.
      Throws:
      SignatureException - if this SignatureSpi instance is not initialized properly.

    • engineSign

      protected byte[] engineSign() throws SignatureException
      Description copied from class: SignatureSpi
      Generates and returns the signature of all updated data.

      This SignatureSpi instance is reset to the state of its last initialization for signing and thus can be used for another signature from the same identity.

      Specified by:
      engineSign in class SignatureSpi
      Returns:
      the signature of all updated data.
      Throws:
      SignatureException - if this SignatureSpi instance is not initialized properly.

    • engineVerify

      protected boolean engineVerify​(byte[] sigBytes) throws SignatureException
      Description copied from class: SignatureSpi
      Indicates whether the given sigBytes can be verified using the public key or a certificate of the signer.

      This SignatureSpi instance is reset to the state of its last initialization for verifying and thus can be used to verify another signature of the same signer.

      Specified by:
      engineVerify in class SignatureSpi
      Parameters:
      sigBytes - the signature to verify.
      Returns:
      true if the signature was verified, false otherwise.
      Throws:
      SignatureException - if this SignatureSpi instance is not initialized properly.

    • engineSetParameter

      protected void engineSetParameter​(AlgorithmParameterSpec params)
      Description copied from class: SignatureSpi
      Sets the specified AlgorithmParameterSpec.
      Overrides:
      engineSetParameter in class SignatureSpi
      Parameters:
      params - the parameter to set.

    • engineSetParameter

      protected void engineSetParameter​(String param, Object value)
      Deprecated.
      replaced with
      Description copied from class: SignatureSpi
      Sets the specified parameter to the given value.
      Specified by:
      engineSetParameter in class SignatureSpi
      Parameters:
      param - the name of the parameter.
      value - the parameter value.

    • engineGetParameter

      protected Object engineGetParameter​(String param)
      Deprecated.
      Description copied from class: SignatureSpi
      Returns the value of the parameter with the specified name.
      Specified by:
      engineGetParameter in class SignatureSpi
      Parameters:
      param - the name of the requested parameter value.
      Returns:
      the value of the parameter with the specified name, maybe null.