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Merge pull request #43 from dawei101/dawei/rc4md5_n_chacha20
Dawei/rc4md5 n chacha20
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83 changes: 83 additions & 0 deletions
83
app/src/main/java/com/vm/shadowsocks/tunnel/shadowsocks/Chacha20Crypt.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,83 @@ | ||
| package com.vm.shadowsocks.tunnel.shadowsocks; | ||
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| import org.bouncycastle.crypto.StreamCipher; | ||
| import org.bouncycastle.crypto.engines.ChaChaEngine; | ||
| import org.bouncycastle.crypto.engines.ChaCha7539Engine; | ||
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| import java.io.ByteArrayOutputStream; | ||
| import java.security.InvalidAlgorithmParameterException; | ||
| import java.util.HashMap; | ||
| import java.util.Map; | ||
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| import javax.crypto.SecretKey; | ||
| import javax.crypto.spec.SecretKeySpec; | ||
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| public class Chacha20Crypt extends CryptBase { | ||
| public final static String CIPHER_CHACHA20 = "chacha20"; | ||
| public final static String CIPHER_CHACHA20_IETF = "chacha20-ietf"; | ||
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| public static Map<String, String> getCiphers() { | ||
| Map<String, String> ciphers = new HashMap<>(); | ||
| ciphers.put(CIPHER_CHACHA20, Chacha20Crypt.class.getName()); | ||
| ciphers.put(CIPHER_CHACHA20_IETF, Chacha20Crypt.class.getName()); | ||
| return ciphers; | ||
| } | ||
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| public Chacha20Crypt(String name, String password) { | ||
| super(name, password); | ||
| } | ||
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| @Override | ||
| protected StreamCipher getCipher(boolean isEncrypted) throws InvalidAlgorithmParameterException { | ||
| if (_name.equals(CIPHER_CHACHA20)) { | ||
| return new ChaChaEngine(); | ||
| } | ||
| else if (_name.equals(CIPHER_CHACHA20_IETF)) { | ||
| return new ChaCha7539Engine(); | ||
| } | ||
| return null; | ||
| } | ||
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| @Override | ||
| protected SecretKey getKey() { | ||
| return new SecretKeySpec(_ssKey.getEncoded(), "AES"); | ||
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| } | ||
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| @Override | ||
| protected void _encrypt(byte[] data, ByteArrayOutputStream stream) { | ||
| int noBytesProcessed; | ||
| byte[] buffer = new byte[data.length]; | ||
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| noBytesProcessed = encCipher.processBytes(data, 0, data.length, buffer, 0); | ||
| stream.write(buffer, 0, noBytesProcessed); | ||
| } | ||
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| @Override | ||
| protected void _decrypt(byte[] data, ByteArrayOutputStream stream) { | ||
| int BytesProcessedNum; | ||
| byte[] buffer = new byte[data.length]; | ||
| BytesProcessedNum = decCipher.processBytes(data, 0, data.length, buffer, 0); | ||
| stream.write(buffer, 0, BytesProcessedNum); | ||
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| } | ||
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| @Override | ||
| public int getKeyLength() { | ||
| if (_name.equals(CIPHER_CHACHA20) || _name.equals(CIPHER_CHACHA20_IETF)) { | ||
| return 32; | ||
| } | ||
| return 0; | ||
| } | ||
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| @Override | ||
| public int getIVLength() { | ||
| if (_name.equals(CIPHER_CHACHA20)) { | ||
| return 8; | ||
| } | ||
| else if (_name.equals(CIPHER_CHACHA20_IETF)) { | ||
| return 12; | ||
| } | ||
| return 0; | ||
| } | ||
| } |
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75 changes: 75 additions & 0 deletions
75
app/src/main/java/com/vm/shadowsocks/tunnel/shadowsocks/Rc4Md5Crypt.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,75 @@ | ||
| package com.vm.shadowsocks.tunnel.shadowsocks; | ||
|
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| import org.bouncycastle.crypto.CipherParameters; | ||
| import org.bouncycastle.crypto.StreamCipher; | ||
| import org.bouncycastle.crypto.engines.RC4Engine; | ||
| import org.bouncycastle.crypto.params.KeyParameter; | ||
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| import java.io.ByteArrayOutputStream; | ||
| import java.security.InvalidAlgorithmParameterException; | ||
| import java.util.HashMap; | ||
| import java.util.Map; | ||
|
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| import javax.crypto.SecretKey; | ||
| import javax.crypto.spec.SecretKeySpec; | ||
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| public class Rc4Md5Crypt extends CryptBase { | ||
| public static String CIPHER_RC4_MD5 = "rc4-md5"; | ||
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| public static Map<String, String> getCiphers() { | ||
| Map<String, String> ciphers = new HashMap<String, String>(); | ||
| ciphers.put(CIPHER_RC4_MD5, Rc4Md5Crypt.class.getName()); | ||
| return ciphers; | ||
| } | ||
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| public Rc4Md5Crypt(String name, String password) { | ||
| super(name, password); | ||
| } | ||
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| @Override | ||
| protected StreamCipher getCipher(boolean isEncrypted) throws InvalidAlgorithmParameterException { | ||
| return new RC4Engine(); | ||
| } | ||
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| @Override | ||
| protected SecretKey getKey() { | ||
| return new SecretKeySpec(_ssKey.getEncoded(), "AES"); | ||
| } | ||
|
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| @Override | ||
| protected void _encrypt(byte[] data, ByteArrayOutputStream stream) { | ||
| int noBytesProcessed; | ||
| byte[] buffer = new byte[data.length]; | ||
|
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| noBytesProcessed = encCipher.processBytes(data, 0, data.length, buffer, 0); | ||
| stream.write(buffer, 0, noBytesProcessed); | ||
| } | ||
|
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| @Override | ||
| protected void _decrypt(byte[] data, ByteArrayOutputStream stream) { | ||
| int noBytesProcessed; | ||
| byte[] buffer = new byte[data.length]; | ||
|
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| noBytesProcessed = decCipher.processBytes(data, 0, data.length, buffer, 0); | ||
| stream.write(buffer, 0, noBytesProcessed); | ||
| } | ||
|
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| @Override | ||
| public int getIVLength() { | ||
| return 16; | ||
| } | ||
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| @Override | ||
| public int getKeyLength() { | ||
| return 16; | ||
| } | ||
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| @Override | ||
| protected CipherParameters getCipherParameters(byte[] iv) { | ||
| byte[] bts = new byte[_keyLength + _ivLength]; | ||
| System.arraycopy(_key.getEncoded(), 0, bts, 0, _keyLength); | ||
| System.arraycopy(iv, 0, bts, _keyLength, _ivLength); | ||
| return new KeyParameter(md5Digest(bts)); | ||
| } | ||
| } |
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