import java.security.Key; import javax.crypto.Cipher; import javax.crypto.SecretKeyFactory; import javax.crypto.spec.DESedeKeySpec; import javax.crypto.spec.IvParameterSpec; import android.util.Base64; public class Des3 { public Des3() throws Exception { //密钥 byte[] key=Base64.decode("12345678901234567890123456789000", Base64.DEFAULT); byte[] keyiv = { 1, 2, 3, 4, 5, 6, 7, 8 }; //原始数据 String mainStr = "达达ABCacb123"; //原始数据转byte byte[] data = mainStr.getBytes("UTF-8"); System.out.println("原始数据:" + mainStr); System.out.println("ECB加密解密"); //加密后的byte[] byte[] encodeByte_ECB = des3EncodeECB(key, data); //加密后的String 需把加密的byte[]转base64 String encodeString_ECB =Base64.encodeToString(encodeByte_ECB, Base64.DEFAULT); System.out.println("加密的数据是:" + encodeString_ECB); //解密后的原始byte[] 需把加密后的byte[]转bass64 byte[] decodeByteMain_ECB=Base64.decode(encodeString_ECB, Base64.DEFAULT); //解密后的byte[] byte[] decodeByte_ECB = ees3DecodeECB(key, decodeByteMain_ECB); //解密后的String String decodeString_ECB = new String(decodeByte_ECB, "UTF-8"); System.out.println("解密后的数据是:" + decodeString_ECB); System.out.println("CBC加密解密"); //加密后的byte[] byte[] encodeByte_CBC = des3EncodeCBC(key, keyiv,data); //加密后的String 需把加密的byte[]转base64 String encodeString_CBC =Base64.encodeToString(encodeByte_CBC, Base64.DEFAULT); System.out.println("加密的数据是:" + encodeString_CBC); //解密后的原始byte[] 需把加密后的byte[]转bass64 byte[] decodeByteMain_CBC=Base64.decode(encodeString_CBC, Base64.DEFAULT); //解密后的byte[] byte[] decodeByte_CBC = des3DecodeCBC(key, keyiv, decodeByteMain_CBC); //解密后的String String decodeString_CBC = new String(decodeByte_CBC, "UTF-8"); System.out.println("解密后的数据是:" + decodeString_CBC); } public static byte[] des3EncodeECB(byte[] key, byte[] data) throws Exception { Key deskey = null; DESedeKeySpec spec = new DESedeKeySpec(key); SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede"); deskey = keyfactory.generateSecret(spec); Cipher cipher = Cipher.getInstance("desede" + "/ECB/PKCS5Padding"); cipher.init(Cipher.ENCRYPT_MODE, deskey); byte[] bOut = cipher.doFinal(data); return bOut; } public static byte[] ees3DecodeECB(byte[] key, byte[] data) throws Exception { Key deskey = null; DESedeKeySpec spec = new DESedeKeySpec(key); SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede"); deskey = keyfactory.generateSecret(spec); Cipher cipher = Cipher.getInstance("desede" + "/ECB/PKCS5Padding"); cipher.init(Cipher.DECRYPT_MODE, deskey); byte[] bOut = cipher.doFinal(data); return bOut; } public static byte[] des3EncodeCBC(byte[] key, byte[] keyiv, byte[] data) throws Exception { Key deskey = null; DESedeKeySpec spec = new DESedeKeySpec(key); SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede"); deskey = keyfactory.generateSecret(spec); Cipher cipher = Cipher.getInstance("desede" + "/CBC/PKCS5Padding"); IvParameterSpec ips = new IvParameterSpec(keyiv); cipher.init(Cipher.ENCRYPT_MODE, deskey, ips); byte[] bOut = cipher.doFinal(data); return bOut; } public static byte[] des3DecodeCBC(byte[] key, byte[] keyiv, byte[] data) throws Exception { Key deskey = null; DESedeKeySpec spec = new DESedeKeySpec(key); SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede"); deskey = keyfactory.generateSecret(spec); Cipher cipher = Cipher.getInstance("desede" + "/CBC/PKCS5Padding"); IvParameterSpec ips = new IvParameterSpec(keyiv); cipher.init(Cipher.DECRYPT_MODE, deskey, ips); byte[] bOut = cipher.doFinal(data); return bOut; } }
转载自:http://blog.sina.com.cn/s/blog_677fb16e01018eqw.html