Android AES加密 ecb模式加密
16lz
2021-01-23
Android AES加密 ==ecb模式加密
下面有两套代码都可以实现
第一套
import javax.crypto.Cipher;import javax.crypto.spec.SecretKeySpec;import android.util.Base64;public class AESECB { // 加密 public static String Encrypt(String sSrc, String sKey) throws Exception { if (sKey == null) { System.out.print("Key为空null"); return null; } // 判断Key是否为16位 if (sKey.length() != 16) { System.out.print("Key长度不是16位"); return null; } byte[] raw = sKey.getBytes("utf-8"); SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES"); Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");//"算法/模式/补码方式" cipher.init(Cipher.ENCRYPT_MODE, skeySpec); byte[] encrypted = cipher.doFinal(sSrc.getBytes("utf-8"));// return new Base64().encodeToString(encrypted);//此处使用BASE64做转码功能，同时能起到2次加密的作用。 return Base64.encodeToString(encrypted, Base64.DEFAULT); } // 解密 public static String Decrypt(String sSrc, String sKey) throws Exception { try { // 判断Key是否正确 if (sKey == null) { System.out.print("Key为空null"); return null; } // 判断Key是否为16位 if (sKey.length() != 16) { System.out.print("Key长度不是16位"); return null; } byte[] raw = sKey.getBytes("utf-8"); SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES"); Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding"); cipher.init(Cipher.DECRYPT_MODE, skeySpec);// byte[] encrypted1 = new Base64().decode(sSrc);//先用base64解密 byte[] encrypted1 = Base64.decode(sSrc.getBytes("UTF-8"), Base64.DEFAULT); try { byte[] original = cipher.doFinal(encrypted1); String originalString = new String(original,"utf-8"); return originalString; } catch (Exception e) { System.out.println(e.toString()); return null; } } catch (Exception ex) { System.out.println(ex.toString()); return null; } } public static void main(String[] args) throws Exception { /* * 此处使用AES-128-ECB加密模式，key需要为16位。 */ // 需要加密的字串 String sKey = "key值key值key值"; String cSrc = "Linsk123456_ecb模式"; System.out.println(cSrc); // 加密 String enString = AESECB.Encrypt(cSrc, sKey); System.out.println("加密后的字串是：" + enString); // 解密 String DeString = AESECB.Decrypt(enString, sKey); System.out.println("解密后的字串是：" + DeString); }}执行代码，生成字符串末尾带"\n"，需要替换掉
String sKey = "key值key值key值";AESECB.Encrypt("待加密字符串", sKey).replaceAll("\r|\n", "")第二套
import android.util.Base64;import java.io.UnsupportedEncodingException;import javax.crypto.Cipher;import javax.crypto.spec.SecretKeySpec;/** * AES加密解密工具 * * @author huangxiaoguo */public class AESUtils { public static String encrypt(String sSrc, String sKey){ String rts = ""; try { byte[] data = sSrc.getBytes("utf-8"); byte[] key = sKey.getBytes("utf-8"); byte[] encrypted = encrypt(data, key); rts = Base64.encodeToString(encrypted, Base64.DEFAULT); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } return rts; } public static String decrypt(String sSrc, String sKey) { String rts = ""; try { byte[] raw = sKey.getBytes("utf-8"); byte[] encrypted1 = Base64.decode(sSrc.getBytes("UTF-8"), Base64.DEFAULT); byte[] original = decrypt(encrypted1, raw); rts = new String(original,"utf-8"); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } return rts; } /** * AES加密 * * @param data * 将要加密的内容 * @param key * 密钥 * @return 已经加密的内容 */ public static byte[] encrypt(byte[] data, byte[] key) { //不足16字节，补齐内容为差值 int len = 16 - data.length % 16; for (int i = 0; i < len; i++) { byte[] bytes = { (byte) len }; data = ArrayUtils.concat(data, bytes); } try { SecretKeySpec skeySpec = new SecretKeySpec(key, "AES"); Cipher cipher = Cipher.getInstance("AES/ECB/NoPadding"); cipher.init(Cipher.ENCRYPT_MODE, skeySpec); return cipher.doFinal(data); } catch (Exception e) { e.printStackTrace(); } return new byte[] { }; } /** * AES解密 * * @param data * 将要解密的内容 * @param key * 密钥 * @return 已经解密的内容 */ public static byte[] decrypt(byte[] data, byte[] key) { data = ArrayUtils.noPadding(data, -1); try { SecretKeySpec skeySpec = new SecretKeySpec(key, "AES"); Cipher cipher = Cipher.getInstance("AES/ECB/NoPadding"); cipher.init(Cipher.DECRYPT_MODE, skeySpec); byte[] decryptData = cipher.doFinal(data); int len = 2 + ByteUtils.byteToInt(decryptData[4]) + 3; return ArrayUtils.noPadding(decryptData, len); } catch (Exception e) { e.printStackTrace(); } return new byte[] { }; }}ArrayUtils
/** * 数组工具 * * @author huangxiaoguo */ public class ArrayUtils { /** * 合并数组 * * @param firstArray * 第一个数组 * @param secondArray * 第二个数组 * @return 合并后的数组 */ public static byte[] concat(byte[] firstArray, byte[] secondArray) { if (firstArray == null || secondArray == null) { return null; } byte[] bytes = new byte[firstArray.length + secondArray.length]; System.arraycopy(firstArray, 0, bytes, 0, firstArray.length); System.arraycopy(secondArray, 0, bytes, firstArray.length, secondArray.length); return bytes; } /** * 去除数组中的补齐 * * @param paddingBytes * 源数组 * @param dataLength * 去除补齐后的数据长度 * @return 去除补齐后的数组 */ public static byte[] noPadding(byte[] paddingBytes, int dataLength) { if (paddingBytes == null) { return null; } byte[] noPaddingBytes = null; if (dataLength > 0) { if (paddingBytes.length > dataLength) { noPaddingBytes = new byte[dataLength]; System.arraycopy(paddingBytes, 0, noPaddingBytes, 0, dataLength); } else { noPaddingBytes = paddingBytes; } } else { int index = paddingIndex(paddingBytes); if (index > 0) { noPaddingBytes = new byte[index]; System.arraycopy(paddingBytes, 0, noPaddingBytes, 0, index); } } return noPaddingBytes; } /** * 获取补齐的位置 * * @param paddingBytes * 源数组 * @return 补齐的位置 */ private static int paddingIndex(byte[] paddingBytes) { for (int i = paddingBytes.length - 1; i >= 0; i--) { if (paddingBytes[i] != 0) { return i + 1; } } return -1; } }ByteUtils
public class ByteUtils { public static int byteToInt(byte b) { return (b) & 0xff; }}执行代码，生成字符串末尾带"\n"，需要替换掉
String sKey = "key值key值key值";AESUtils.encrypt("待加密字符串", sKey).replaceAll("\r|\n", "")参考
https://blog.csdn.net/dingweijson/article/details/84920045
https://blog.csdn.net/huangxiaoguo1/article/details/78043098
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