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package sun.security.krb5.internal.crypto;

import sun.security.krb5.EncryptedData;
import sun.security.krb5.internal.crypto.dk.ArcFourCrypto;
import sun.security.krb5.KrbCryptoException;
import java.security.GeneralSecurityException;

Class with static methods for doing RC4-HMAC operations.
Author:Seema Malkani
/** * Class with static methods for doing RC4-HMAC operations. * * @author Seema Malkani */
public class ArcFourHmac { private static final ArcFourCrypto CRYPTO = new ArcFourCrypto(128); private ArcFourHmac() { } public static byte[] stringToKey(char[] password) throws GeneralSecurityException { return CRYPTO.stringToKey(password); } // in bytes public static int getChecksumLength() { return CRYPTO.getChecksumLength(); } public static byte[] calculateChecksum(byte[] baseKey, int usage, byte[] input, int start, int len) throws GeneralSecurityException { return CRYPTO.calculateChecksum(baseKey, usage, input, start, len); } /* Encrypt Sequence Number */ public static byte[] encryptSeq(byte[] baseKey, int usage, byte[] checksum, byte[] plaintext, int start, int len) throws GeneralSecurityException, KrbCryptoException { return CRYPTO.encryptSeq(baseKey, usage, checksum, plaintext, start, len); } /* Decrypt Sequence Number */ public static byte[] decryptSeq(byte[] baseKey, int usage, byte[] checksum, byte[] ciphertext, int start, int len) throws GeneralSecurityException, KrbCryptoException { return CRYPTO.decryptSeq(baseKey, usage, checksum, ciphertext, start, len); } public static byte[] encrypt(byte[] baseKey, int usage, byte[] ivec, byte[] plaintext, int start, int len) throws GeneralSecurityException, KrbCryptoException { return CRYPTO.encrypt(baseKey, usage, ivec, null /* new_ivec */, plaintext, start, len); } /* Encrypt plaintext; do not add confounder, or checksum */ public static byte[] encryptRaw(byte[] baseKey, int usage, byte[] seqNum, byte[] plaintext, int start, int len) throws GeneralSecurityException, KrbCryptoException { return CRYPTO.encryptRaw(baseKey, usage, seqNum, plaintext, start, len); } public static byte[] decrypt(byte[] baseKey, int usage, byte[] ivec, byte[] ciphertext, int start, int len) throws GeneralSecurityException { return CRYPTO.decrypt(baseKey, usage, ivec, ciphertext, start, len); } /* Decrypt ciphertext; do not remove confounder, or check checksum */ public static byte[] decryptRaw(byte[] baseKey, int usage, byte[] ivec, byte[] ciphertext, int start, int len, byte[] seqNum) throws GeneralSecurityException { return CRYPTO.decryptRaw(baseKey, usage, ivec, ciphertext, start, len, seqNum); } };