Package org.bouncycastle.crypto.generators

Class PKCS5S1ParametersGenerator

java.lang.Object
org.bouncycastle.crypto.PBEParametersGenerator
org.bouncycastle.crypto.generators.PKCS5S1ParametersGenerator
public class PKCS5S1ParametersGenerator extends PBEParametersGenerator
Generator for PBE derived keys and ivs as defined by PKCS 5 V2.0 Scheme 1. Note this generator is limited to the size of the hash produced by the digest used to drive it.

The document this implementation is based on can be found at RSA's PKCS5 Page

  • Constructor Details

    • PKCS5S1ParametersGenerator

      public PKCS5S1ParametersGenerator(Digest digest)
      Construct a PKCS 5 Scheme 1 Parameters generator.
      Parameters:
      digest - the digest to be used as the source of derived keys.

  • Method Details

    • generateDerivedParameters

      public CipherParameters generateDerivedParameters(int keySize)
      Generate a key parameter derived from the password, salt, and iteration count we are currently initialised with.
      Specified by:
      generateDerivedParameters in class PBEParametersGenerator
      Parameters:
      keySize - the size of the key we want (in bits)
      Returns:
      a KeyParameter object.
      Throws:
      IllegalArgumentException - if the key length larger than the base hash size.

    • generateDerivedParameters

      public CipherParameters generateDerivedParameters(int keySize, int ivSize)
      Generate a key with initialisation vector parameter derived from the password, salt, and iteration count we are currently initialised with.
      Specified by:
      generateDerivedParameters in class PBEParametersGenerator
      Parameters:
      keySize - the size of the key we want (in bits)
      ivSize - the size of the iv we want (in bits)
      Returns:
      a ParametersWithIV object.
      Throws:
      IllegalArgumentException - if keySize + ivSize is larger than the base hash size.

    • generateDerivedMacParameters

      public CipherParameters generateDerivedMacParameters(int keySize)
      Generate a key parameter for use with a MAC derived from the password, salt, and iteration count we are currently initialised with.
      Specified by:
      generateDerivedMacParameters in class PBEParametersGenerator
      Parameters:
      keySize - the size of the key we want (in bits)
      Returns:
      a KeyParameter object.
      Throws:
      IllegalArgumentException - if the key length larger than the base hash size.