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Bouncy Castle Cryptography 1.11 API Specification: Class PKCS5S1ParametersGenerator
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Bouncy Castle Cryptography 1.11
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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

Fields inherited from class org.bouncycastle.crypto.PBEParametersGenerator
iterationCount, password, salt
 
Constructor Summary
PKCS5S1ParametersGenerator(Digest digest)
          Construct a PKCS 5 Scheme 1 Parameters generator.
 
Method Summary
 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.
 CipherParameters generateDerivedParameters(int keySize)
          Generate a key parameter derived from the password, salt, and iteration count we are currently initialised with.
 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.
 
Methods inherited from class org.bouncycastle.crypto.PBEParametersGenerator
getIterationCount, getPassword, getSalt, init, PKCS12PasswordToBytes, PKCS5PasswordToBytes
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

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 Detail

generateDerivedParameters

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