解决加密认证解密失败bug

This commit is contained in:
kerwincui
2022-05-19 16:50:44 +08:00
parent b98b326674
commit 9412466747

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@@ -7,6 +7,8 @@ import javax.crypto.spec.SecretKeySpec;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
import java.security.MessageDigest;
/**
*
*/
@@ -15,54 +17,62 @@ public class AESUtils {
/**
* 加密用的Key 可以用26个字母和数字组成 使用AES-128-CBC加密模式key需要为16位。iv 偏移量长度16
*/
private static final String ivString ="wumei-smart-open";
private static final String ivString = "wumei-smart-open";
private static final String ENCRYPT_MODE = "CBC"; // ECB和CBC两种模式
// 加密
public static String encrypt(String sSrc, String sKey) throws Exception {
if (sKey == null) {
System.out.print("Key为空null");
public static String encrypt(String plainText, String key) {
// 判断Key是否正确
if (key == null || key.length() != 16) {
System.out.print("Key不能为空长度不是16位");
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();
try {
byte[] raw = key.getBytes("utf-8");
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
//"算法/模式/补码方式"
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
//使用CBC模式需要一个向量iv可增加加密算法的强度
IvParameterSpec iv = new IvParameterSpec(ivString.getBytes());
Cipher cipher = Cipher.getInstance("AES/" + AESUtils.ENCRYPT_MODE + "/PKCS5Padding");
if (AESUtils.ENCRYPT_MODE.equals("ECB")) {
cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
} else {
IvParameterSpec iv = new IvParameterSpec(ivString.getBytes("utf-8"));//使用CBC模式需要一个向量iv可增加加密算法的强度
cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
byte[] encrypted = cipher.doFinal(sSrc.getBytes());
}
byte[] encrypted = cipher.doFinal(plainText.getBytes("utf-8"));
String encryptedStr = new String(new BASE64Encoder().encode(encrypted));
//此处使用BASE64做转码功能同时能起到2次加密的作用。
return new BASE64Encoder().encode(encrypted);
return encryptedStr;
} catch (Exception ex) {
System.out.println(ex.toString());
return null;
}
}
// 解密
public static String decrypt(String sSrc, String sKey) throws Exception {
try {
public static String decrypt(String cipherText, String key) {
// 判断Key是否正确
if (sKey == null) {
System.out.print("Key为空null");
if (key == null || key.length() != 16) {
System.out.print("Key不能为空长度不是16位");
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("ASCII");
// 根据html规范后端接口接收参数包含+号会被替换为空格。所以这里需要还原回来,不然会造成解密失败
cipherText=cipherText.replace(' ','+');
try {
byte[] raw = key.getBytes("utf-8");
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
IvParameterSpec iv = new IvParameterSpec(ivString.getBytes());
Cipher cipher = Cipher.getInstance("AES/" + AESUtils.ENCRYPT_MODE + "/PKCS5Padding");
if (AESUtils.ENCRYPT_MODE.equals("ECB")) {
cipher.init(Cipher.DECRYPT_MODE, skeySpec);
} else {
//使用CBC模式需要一个向量iv可增加加密算法的强度
IvParameterSpec iv = new IvParameterSpec(ivString.getBytes("utf-8"));
cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);
}
//先用base64解密
byte[] encrypted = new BASE64Decoder().decodeBuffer(sSrc);
byte[] encrypted = new BASE64Decoder().decodeBuffer(cipherText);
try {
byte[] original = cipher.doFinal(encrypted);
String originalString = new String(original,"UTF-8");
String originalString = new String(original, "utf-8");
return originalString;
} catch (Exception e) {
System.out.println(e.toString());
@@ -74,4 +84,37 @@ public class AESUtils {
}
}
/**
* 进行MD5加密
*
* @param s 要进行MD5转换的字符串
* @return 该字符串的MD5值的8-24位
*/
public static String getMD5(String s) {
char hexDigits[] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
try {
byte[] btInput = s.getBytes();
// 获得MD5摘要算法的 MessageDigest 对象
MessageDigest mdInst = MessageDigest.getInstance("MD5");
// 使用指定的字节更新摘要
mdInst.update(btInput);
// 获得密文
byte[] md = mdInst.digest();
// 把密文转换成十六进制的字符串形式
int j = md.length;
char str[] = new char[j * 2];
int k = 0;
for (int i = 0; i < j; i++) {
byte byte0 = md[i];
str[k++] = hexDigits[byte0 >>> 4 & 0xf];
str[k++] = hexDigits[byte0 & 0xf];
}
return new String(str).substring(8, 24);
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
}