getSignKey

src/main/java/com/common/toolbox/app_utils/AuthUtil.java

+package com.common.toolbox.app_utils;
+
+import android.text.TextUtils;
+
+
+/**
+ * @author Mansoul
+ * @create 2019/2/10 20:29
+ * @des
+ */
+public class AuthUtil {
+
+
+    /**
+     * app秘钥解密
+     *
+     * @param secretKey display返回的restUrlSignKey字段
+     * @return
+     */
+    public static String getSignKey(String secretKey) {
+        if (TextUtils.isEmpty(secretKey)) {
+            return "";
+        }
+        byte[] decode = Base64.getDecoder().decode(secretKey);
+        return new String(ThreeDes.decrypt(decode));
+    }
+}

src/main/java/com/common/toolbox/app_utils/ThreeDes.java

+package com.common.toolbox.app_utils;
+
+
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+
+import javax.crypto.Cipher;
+import javax.crypto.SecretKey;
+import javax.crypto.spec.SecretKeySpec;
+
+public class ThreeDes {
+    /**
+     * @param args在java中调用sun公司提供的3DES加密解密算法时，需要使
+     * 用到$JAVA_HOME/jre/lib/目录下如下的4个jar包：
+     * jce.jar
+     * security/US_export_policy.jar
+     * security/local_policy.jar
+     * ext/sunjce_provider.jar
+     */
+
+    private static final String ALGORITHM = "DESede"; //定义加密算法,可用 DES,DESede,Blowfish
+    private static final String DEFAULT_KEY = "starwin123456";
+
+    //keyByte为加密密钥，长度为24字节
+    //src为被加密的数据缓冲区（源）
+    public static byte[] encrypt(byte[] keyByte, byte[] src) {
+        try {
+            //生成密钥
+            SecretKey deskey = new SecretKeySpec(keyByte, ALGORITHM);
+            //加密
+            Cipher c1 = Cipher.getInstance(ALGORITHM);
+            c1.init(Cipher.ENCRYPT_MODE, deskey);
+            return c1.doFinal(src);//在单一方面的加密或解密
+        } catch (NoSuchAlgorithmException e1) {
+            e1.printStackTrace();
+        } catch (javax.crypto.NoSuchPaddingException e2) {
+            e2.printStackTrace();
+        } catch (Exception e3) {
+            e3.printStackTrace();
+        }
+        return null;
+    }
+
+    //keyByte为加密密钥，长度为24字节
+    //src为加密后的缓冲区
+    public static byte[] decrypt(byte[] keyByte, byte[] src) {
+        try {
+            //生成密钥
+            SecretKey destKey = new SecretKeySpec(keyByte, ALGORITHM);
+            //解密
+            Cipher c1 = Cipher.getInstance(ALGORITHM);
+            c1.init(Cipher.DECRYPT_MODE, destKey);
+            return c1.doFinal(src);
+        } catch (NoSuchAlgorithmException e1) {
+            e1.printStackTrace();
+        } catch (javax.crypto.NoSuchPaddingException e2) {
+            e2.printStackTrace();
+        } catch (Exception e3) {
+            e3.printStackTrace();
+        }
+        return null;
+    }
+
+    public static byte[] decrypt(byte[] src) {
+        return decrypt(hex(DEFAULT_KEY), src);
+    }
+
+    private static String md5Hex(String string) {
+        if (string == null || string.length() == 0) {
+            return "";
+        }
+        MessageDigest md5 = null;
+        try {
+            md5 = MessageDigest.getInstance("MD5");
+            byte[] bytes = md5.digest(string.getBytes());
+            StringBuilder result = new StringBuilder();
+            for (byte b : bytes) {
+                String temp = Integer.toHexString(b & 0xff);
+                if (temp.length() == 1) {
+                    temp = "0" + temp;
+                }
+                result.append(temp);
+            }
+            return result.toString();
+        } catch (NoSuchAlgorithmException e) {
+            e.printStackTrace();
+        }
+        return "";
+    }
+
+    private static byte[] hex(String secretKey) {
+        String f = md5Hex(secretKey);
+        byte[] bytes = f.getBytes();
+        byte[] enk = new byte[24];
+        for (int i = 0; i < 24; i++) {
+            enk[i] = bytes[i];
+        }
+        return enk;
+    }
+
+
+}
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