RSADigestSigner (Bouncy Castle Library 1.52 API Specification)
Date: 2015-03-01

org.bouncycastle.crypto.signers

## Class RSADigestSigner

- java.lang.Object
- - org.bouncycastle.crypto.signers.RSADigestSigner

- All Implemented Interfaces:
    Signer

      public class RSADigestSigner
      extends java.lang.Object
      implements Signer

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `RSADigestSigner(Digest digest)`
    `RSADigestSigner(Digest digest, ASN1ObjectIdentifier digestOid)`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `byte[]` | `generateSignature()` Generate a signature for the message we've been loaded with using the key we were initialised with.
    `java.lang.String` | `getAlgorithmName()` Deprecated.
    `void` | `init(boolean forSigning, CipherParameters parameters)` initialise the signer for signing or verification.
    `void` | `reset()` reset the internal state
    `void` | `update(byte input)` update the internal digest with the byte b
    `void` | `update(byte[] input, int inOff, int length)` update the internal digest with the byte array in
    `boolean` | `verifySignature(byte[] signature)` return true if the internal state represents the signature described in the passed in array.

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### RSADigestSigner

          public RSADigestSigner(Digest digest)

    - #### RSADigestSigner

          public RSADigestSigner(Digest digest,
                         ASN1ObjectIdentifier digestOid)

  - ### Method Detail

    - #### getAlgorithmName

          public java.lang.String getAlgorithmName()

      Deprecated.

    - #### init

          public void init(boolean forSigning,
                  CipherParameters parameters)

      initialise the signer for signing or verification.
      Specified by:
        `init` in interface `Signer`
      Parameters:
        `forSigning` - true if for signing, false otherwise
        `parameters` - necessary parameters.

    - #### update

          public void update(byte input)

      update the internal digest with the byte b
      Specified by:
        `update` in interface `Signer`

    - #### update

          public void update(byte[] input,
                    int inOff,
                    int length)

      update the internal digest with the byte array in
      Specified by:
        `update` in interface `Signer`

    - #### generateSignature

          public byte[] generateSignature()
                                   throws CryptoException,
                                          DataLengthException

      Generate a signature for the message we've been loaded with using the key we were initialised with.
      Specified by:
        `generateSignature` in interface `Signer`
      Throws:
        `CryptoException`
        `DataLengthException`

    - #### verifySignature

          public boolean verifySignature(byte[] signature)

      return true if the internal state represents the signature described in the passed in array.
      Specified by:
        `verifySignature` in interface `Signer`

    - #### reset

          public void reset()

      Description copied from interface: `Signer`
      reset the internal state
      Specified by:
        `reset` in interface `Signer`