Class CMCEEngine

java.lang.Object

org.bouncycastle.crypto.kems.cmce.CMCEEngine

public class CMCEEngine
extends Object

The Classic McEliece KEM as standardised in ISO/IEC 18033-2:2006/Amd 2:2026, Clause 13. A single engine implements both the non-pc construction (Encapsulation 13.12.2 / Decapsulation 13.13.2) and the pc ("plaintext confirmation") construction (13.12.3 / 13.13.3), selected by the pc flag: when pc, a 32-byte confirmation C1 = Hash(2, e) is appended to the ciphertext and the session key is hashed over the full C0 || C1. The semi-systematic "f" key-generation variant is selected by the usePivots flag.

Method Summary

Modifier and Type	Method	Description
int	getCipherTextSize()
static CMCEEngine	getInstance(CMCEParameters params)
int	getPrivateKeySize()
int	getPublicKeySize()
int	getSessionKeySize()
int	kem_dec(byte[] key, byte[] cipher_text, byte[] sk)
int	kem_enc(byte[] cipher_text, byte[] key, byte[] pk, SecureRandom random)
void	kem_keypair(byte[] pk, byte[] sk, SecureRandom random)

Methods inherited from class Object

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

Method Details

getPrivateKeySize

public int getPrivateKeySize()

getPublicKeySize

public int getPublicKeySize()

getCipherTextSize

public int getCipherTextSize()

getInstance

public static CMCEEngine getInstance(CMCEParameters params)

kem_keypair

public void kem_keypair(byte[] pk,
 byte[] sk,
 SecureRandom random)

kem_enc

public int kem_enc(byte[] cipher_text,
 byte[] key,
 byte[] pk,
 SecureRandom random)

kem_dec

public int kem_dec(byte[] key,
 byte[] cipher_text,
 byte[] sk)

getSessionKeySize

public int getSessionKeySize()