org.bouncycastle.pqc.crypto.mceliece
Class McElieceFujisakiCipher
java.lang.Object
org.bouncycastle.pqc.crypto.mceliece.McElieceFujisakiCipher
- All Implemented Interfaces:
- MessageEncryptor
public class McElieceFujisakiCipher
- extends java.lang.Object
- implements MessageEncryptor
This class implements the Fujisaki/Okamoto conversion of the McEliecePKCS.
Fujisaki and Okamoto propose hybrid encryption that merges a symmetric
encryption scheme which is secure in the find-guess model with an asymmetric
one-way encryption scheme which is sufficiently probabilistic to obtain a
public key cryptosystem which is CCA2-secure. For details, see D. Engelbert,
R. Overbeck, A. Schmidt, "A summary of the development of the McEliece
Cryptosystem", technical report.
Field Summary |
static java.lang.String |
OID
The OID of the algorithm. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
OID
public static final java.lang.String OID
- The OID of the algorithm.
- See Also:
- Constant Field Values
McElieceFujisakiCipher
public McElieceFujisakiCipher()
init
public void init(boolean forSigning,
CipherParameters param)
- Specified by:
init
in interface MessageEncryptor
- Parameters:
forSigning
- true if we are encrypting a signature, false
otherwise.param
- key parameters for encryption or decryption.
getKeySize
public int getKeySize(McElieceCCA2KeyParameters key)
throws java.lang.IllegalArgumentException
- Throws:
java.lang.IllegalArgumentException
initCipherDecrypt
public void initCipherDecrypt(McElieceCCA2PrivateKeyParameters privKey)
messageEncrypt
public byte[] messageEncrypt(byte[] input)
throws java.lang.Exception
- Specified by:
messageEncrypt
in interface MessageEncryptor
- Parameters:
input
- the message to be signed.
- Throws:
java.lang.Exception
messageDecrypt
public byte[] messageDecrypt(byte[] input)
throws java.lang.Exception
- Specified by:
messageDecrypt
in interface MessageEncryptor
- Parameters:
input
- the cipher text of the message
- Throws:
java.lang.Exception