RSA Data must start with zero問題解決方案__java

RSA工具使用公開金鑰加密之後產生byte[] ，直接解密是沒有問題的，但將byte[]通過Base64.encode(byte[])之後得到的字串重新getBytes()去解密是會出現RSA Data must start with zero的問題的。

解決方案：

/** * 將加密後的位元組數群組轉換為對象 *  * @MethodName: bytesToString  * @Description:  * @param encrytpByte * @return * @throws */public static String bytesToString(byte[] encrytpByte) {     String result = "";     for (Byte bytes : encrytpByte) {         result += bytes.toString() + " ";     }     return result; }/** * 公開金鑰加密 *  * @MethodName: encrypt  * @Description:  * @param publicKey * @param obj * @return * @throws */public static byte[] encrypt(RSAPublicKey publicKey, byte[] obj) {     if (publicKey != null) {         try {             Cipher cipher = Cipher.getInstance(KEY_ALGORITHM);             cipher.init(Cipher.ENCRYPT_MODE, publicKey);             return cipher.doFinal(obj);         } catch (Exception e) {             e.printStackTrace();         }     }     return null; }/** * 私密金鑰解密 *  * @MethodName: decrypt  * @Description:  * @param privateKey * @param obj * @return * @throws */public static byte[] decrypt(RSAPrivateKey privateKey, byte[] obj) {     if (privateKey != null) {         try {             Cipher cipher = Cipher.getInstance(KEY_ALGORITHM);             cipher.init(Cipher.DECRYPT_MODE, privateKey);             return cipher.doFinal(obj);         } catch (Exception e) {             e.printStackTrace();         }     }     return null; }

測試方法：

@Testpublic void testRSA() throws Exception{String publicKey=EhcacheUtil.get(StaticProperty.WMS_OPEN_API_RSA_PUBLIC_KEY).toString();String privateKey=EhcacheUtil.get(StaticProperty.WMS_OPEN_API_RSA_PRIVATE_KEY).toString();String platformCode="1234",tenantCode="10000";    byte [] bytes=SAASTokenManager.generateBytesToken(publicKey, platformCode, tenantCode);System.out.println("RSA bites 加密:"+new String(bytes)); System.out.println("RSA bites 解密:"+new String(RSAUtils.decryptByPrivateKey(bytes, privateKey)));// 將bytes轉換為StringString bytesStr = RSAUtils.bytesToString(bytes);String[] strArr = bytesStr.split(" ");                int len = strArr.length;                // 轉回bytes        byte[] clone = new byte[len];                 for (int i = 0; i < len; i++) {             clone[i] = Byte.parseByte(strArr[i]);        }System.out.println("RSA bites 解密:"+new String(RSAUtils.decryptByPrivateKey(clone, privateKey)));}