1 files changed, 0 insertions, 178 deletions
diff --git a/src/java/com/android/internal/net/ipsec/ike/crypto/IkeCipher.java b/src/java/com/android/internal/net/ipsec/ike/crypto/IkeCipher.java
deleted file mode 100644
index 33a8b37c..00000000
--- a/src/java/com/android/internal/net/ipsec/ike/crypto/IkeCipher.java
+++ /dev/null
@@ -1,178 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.internal.net.ipsec.ike.crypto;
-
-import android.net.IpSecAlgorithm;
-import android.net.ipsec.ike.SaProposal;
-
-import com.android.internal.net.ipsec.ike.message.IkeSaPayload.EncryptionTransform;
-
-import java.security.NoSuchAlgorithmException;
-import java.security.Provider;
-import java.security.SecureRandom;
-
-import javax.crypto.Cipher;
-import javax.crypto.NoSuchPaddingException;
-
-/**
- * IkeCipher contains common information of normal and combined mode encryption algorithms.
- *
- * @see <a href="https://tools.ietf.org/html/rfc7296#section-3.3.2">RFC 7296, Internet Key Exchange
- *     Protocol Version 2 (IKEv2)</a>
- */
-public abstract class IkeCipher extends IkeCrypto {
-    private static final int KEY_LEN_3DES = 24;
-
-    private static final int IV_LEN_3DES = 8;
-    private static final int IV_LEN_AES_CBC = 16;
-    private static final int IV_LEN_AES_GCM = 8;
-
-    private final boolean mIsAead;
-    private final int mIvLen;
-
-    protected final Cipher mCipher;
-
-    protected IkeCipher(
-            int algorithmId,
-            int keyLength,
-            int ivLength,
-            String algorithmName,
-            boolean isAead,
-            Provider provider) {
-        super(algorithmId, keyLength, algorithmName);
-        mIvLen = ivLength;
-        mIsAead = isAead;
-
-        try {
-            mCipher = Cipher.getInstance(getAlgorithmName(), provider);
-        } catch (NoSuchAlgorithmException | NoSuchPaddingException e) {
-            throw new IllegalArgumentException("Failed to construct " + getTypeString(), e);
-        }
-    }
-
-    /**
-     * Contruct an instance of IkeCipher.
-     *
-     * @param encryptionTransform the valid negotiated EncryptionTransform.
-     * @param provider the security provider.
-     * @return an instance of IkeCipher.
-     */
-    public static IkeCipher create(EncryptionTransform encryptionTransform, Provider provider) {
-        int algorithmId = encryptionTransform.id;
-
-        // Use specifiedKeyLength for algorithms with variable key length. Since
-        // specifiedKeyLength are encoded in bits, it needs to be converted to bytes.
-        switch (algorithmId) {
-            case SaProposal.ENCRYPTION_ALGORITHM_3DES:
-                return new IkeNormalModeCipher(
-                        algorithmId, KEY_LEN_3DES, IV_LEN_3DES, "DESede/CBC/NoPadding", provider);
-            case SaProposal.ENCRYPTION_ALGORITHM_AES_CBC:
-                return new IkeNormalModeCipher(
-                        algorithmId,
-                        encryptionTransform.getSpecifiedKeyLength() / 8,
-                        IV_LEN_AES_CBC,
-                        "AES/CBC/NoPadding",
-                        provider);
-            case SaProposal.ENCRYPTION_ALGORITHM_AES_GCM_8:
-                // Fall through
-            case SaProposal.ENCRYPTION_ALGORITHM_AES_GCM_12:
-                // Fall through
-            case SaProposal.ENCRYPTION_ALGORITHM_AES_GCM_16:
-                // Fall through
-                return new IkeCombinedModeCipher(
-                        algorithmId,
-                        encryptionTransform.getSpecifiedKeyLength() / 8,
-                        IV_LEN_AES_GCM,
-                        "AES/GCM/NoPadding",
-                        provider);
-            default:
-                throw new IllegalArgumentException(
-                        "Unrecognized Encryption Algorithm ID: " + algorithmId);
-        }
-    }
-
-    /**
-     * Check if this encryption algorithm is a combined-mode/AEAD algorithm.
-     *
-     * @return if this encryption algorithm is a combined-mode/AEAD algorithm.
-     */
-    public boolean isAead() {
-        return mIsAead;
-    }
-
-    /**
-     * Get the block size (in bytes).
-     *
-     * @return the block size (in bytes).
-     */
-    public int getBlockSize() {
-        // Currently all supported encryption algorithms are block ciphers. So the return value will
-        // not be zero.
-        return mCipher.getBlockSize();
-    }
-
-    /**
-     * Get initialization vector (IV) length.
-     *
-     * @return the IV length.
-     */
-    public int getIvLen() {
-        return mIvLen;
-    }
-
-    /**
-     * Generate initialization vector (IV).
-     *
-     * @return the initialization vector (IV).
-     */
-    public byte[] generateIv() {
-        byte[] iv = new byte[getIvLen()];
-        new SecureRandom().nextBytes(iv);
-        return iv;
-    }
-
-    protected void validateKeyLenOrThrow(byte[] key) {
-        if (key.length != getKeyLength()) {
-            throw new IllegalArgumentException(
-                    "Expected key with length of : "
-                            + getKeyLength()
-                            + " Received key with length of : "
-                            + key.length);
-        }
-    }
-
-    /**
-     * Build IpSecAlgorithm from this IkeCipher.
-     *
-     * <p>Build IpSecAlgorithm that represents the same encryption algorithm with this IkeCipher
-     * instance with provided encryption key.
-     *
-     * @param key the encryption key in byte array.
-     * @return the IpSecAlgorithm.
-     */
-    public abstract IpSecAlgorithm buildIpSecAlgorithmWithKey(byte[] key);
-
-    /**
-     * Returns algorithm type as a String.
-     *
-     * @return the algorithm type as a String.
-     */
-    @Override
-    public String getTypeString() {
-        return "Encryption Algorithm";
-    }
-}