安卓、IOS端AEC密钥加密 Java端密钥解密通用实现（16进制表现形式）

2021-06-25 21:41:48

由于业务需求，需要实现在客户端对重要信息进行加密，在服务端进行解密。客户端包括IOS和安卓的服务端位Java。

注意密钥需要保持一致，可以自己定义。

安卓端加密代码：

=====================================================================================================================

import android.util.Base64;

import java.io.UnsupportedEncodingException;

import java.security.InvalidAlgorithmParameterException;

import java.security.InvalidKeyException;

import java.security.NoSuchAlgorithmException;

import javax.crypto.BadPaddingException;

import javax.crypto.Cipher;

import javax.crypto.IllegalBlockSizeException;

import javax.crypto.NoSuchPaddingException;

import javax.crypto.spec.IvParameterSpec;

import javax.crypto.spec.SecretKeySpec;

public class SymmetricEncoder {

    private static final String IV_STRING = "A-16-Byte-String";

    private static final String charset = "UTF-8";

    /**

     *

     * @param content 要加密的内容

     * @param key     16位加密密钥

     * @return

     * @throws Exception

     */

    public static String aesEncryptHexStr(String content, String key) throws Exception

    {

        return str2HexStr(aesEncryptString(content,key));

    }

    public static String aesEncryptString(String content, String key) throws InvalidKeyException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException, UnsupportedEncodingException {

        byte[] contentBytes = content.getBytes(charset);

        byte[] keyBytes = key.getBytes(charset);

        byte[] encryptedBytes = aesEncryptBytes(contentBytes, keyBytes);

        return Base64.encodeToString(encryptedBytes, Base64.NO_WRAP);

    }

    /**

     * 字符串转换成十六进制字符串

     * @return String 每个Byte之间空格分隔，如: [61 6C 6B]

     */

    public static String str2HexStr(String str)

    {

        char[] chars = "0123456789ABCDEF".toCharArray();

        StringBuilder sb = new StringBuilder("");

        byte[] bs = str.getBytes();

        int bit;

        for (int i = 0; i < bs.length; i++)

        {

            bit = (bs[i] & 0x0f0) >> 4;

            sb.append(chars[bit]);

            bit = bs[i] & 0x0f;

            sb.append(chars[bit]);

        }

        return sb.toString().trim();

    }

    public static String aesDecryptString(String content, String key) throws InvalidKeyException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException, UnsupportedEncodingException {

        byte[] encryptedBytes = Base64.decode(content.getBytes(), Base64.NO_WRAP);

        byte[] keyBytes = key.getBytes(charset);

        byte[] decryptedBytes = aesDecryptBytes(encryptedBytes, keyBytes);

        return new String(decryptedBytes, charset);

    }

    public static byte[] aesEncryptBytes(byte[] contentBytes, byte[] keyBytes) throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException, UnsupportedEncodingException {

        return cipherOperation(contentBytes, keyBytes, Cipher.ENCRYPT_MODE);

    }

    public static byte[] aesDecryptBytes(byte[] contentBytes, byte[] keyBytes) throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException, UnsupportedEncodingException {

        return cipherOperation(contentBytes, keyBytes, Cipher.DECRYPT_MODE);

    }

    private static byte[] cipherOperation(byte[] contentBytes, byte[] keyBytes, int mode) throws UnsupportedEncodingException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException {

        SecretKeySpec secretKey = new SecretKeySpec(keyBytes, "AES");

        byte[] initParam = IV_STRING.getBytes(charset);

        IvParameterSpec ivParameterSpec = new IvParameterSpec(initParam);

        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");

        cipher.init(mode, secretKey, ivParameterSpec);

        return cipher.doFinal(contentBytes);

    }

    public static void main(String args[]){

        try {

            // 要加密的内容 加密的密钥

            SymmetricEncoder.aesEncryptHexStr("xiaoming9999","ABCDEFGHIJKLMNOP");

        } catch (Exception e) {

            e.printStackTrace();

        }

    }

}

IOS 端加密:

=====================================================================================================================

//  AESCipher.h

#import <Foundation/Foundation.h>

NSString * aesEncryptString(NSString *content, NSString *key);

NSString * aesEncryptHexStr(NSString *content, NSString *key);//16进制表现形式

NSString * aesDecryptString(NSString *content, NSString *key);

NSString * hexStringFromString(NSString *string);

NSData * aesEncryptData(NSData *data, NSData *key);

NSData * aesDecryptData(NSData *data, NSData *key);

//

//  AESCipher.m

//  AESCipher

//

#import "AESCipher.h"

#import <CommonCrypto/CommonCryptor.h>

NSString const *kInitVector = @"A-16-Byte-String";

size_t const kKeySize = kCCKeySizeAES128;

NSData * cipherOperation(NSData *contentData, NSData *keyData, CCOperation operation) {

    NSUInteger dataLength = contentData.length;

    void const *initVectorBytes = [kInitVector dataUsingEncoding:NSUTF8StringEncoding].bytes;

    void const *contentBytes = contentData.bytes;

    void const *keyBytes = keyData.bytes;

    size_t operationSize = dataLength + kCCBlockSizeAES128;

    void *operationBytes = malloc(operationSize);

    size_t actualOutSize = ;

    CCCryptorStatus cryptStatus = CCCrypt(operation,

                                          kCCAlgorithmAES,

                                          kCCOptionPKCS7Padding,

                                          keyBytes,

                                          kKeySize,

                                          initVectorBytes,

                                          contentBytes,

                                          dataLength,

                                          operationBytes,

                                          operationSize,

                                          &actualOutSize);

    if (cryptStatus == kCCSuccess) {

        return [NSData dataWithBytesNoCopy:operationBytes length:actualOutSize];

    }

    free(operationBytes);

    return nil;

}

NSString * aesEncryptString(NSString *content, NSString *key) {

    NSData *contentData = [content dataUsingEncoding:NSUTF8StringEncoding];

    NSData *keyData = [key dataUsingEncoding:NSUTF8StringEncoding];

    NSData *encrptedData = aesEncryptData(contentData, keyData);

    return [encrptedData base64EncodedStringWithOptions:NSDataBase64EncodingEndLineWithLineFeed];

}

NSString * aesEncryptHexStr(NSString *content, NSString *key){

   NSString *str=aesDecryptString(content,key);

   return hexStringFromString(str);

}

//普通字符串转换为十六进制的。

NSString * hexStringFromString(NSString *string){

    NSData *myD = [string dataUsingEncoding:NSUTF8StringEncoding];

    Byte *bytes = (Byte *)[myD bytes];

    //下面是Byte 转换为16进制。

    NSString *hexStr=@"";

    for(int i=;i<[myD length];i++)

    {

        NSString *newHexStr = [NSString stringWithFormat:@"%x",bytes[i]&0xff];///16进制数

        if([newHexStr length]==)

            hexStr = [NSString stringWithFormat:@"%@0%@",hexStr,newHexStr];

        else

            hexStr = [NSString stringWithFormat:@"%@%@",hexStr,newHexStr];

    }

    return hexStr;

}

NSString * aesDecryptString(NSString *content, NSString *key) {

    NSData *contentData = [[NSData alloc] initWithBase64EncodedString:content options:NSDataBase64DecodingIgnoreUnknownCharacters];

    NSData *keyData = [key dataUsingEncoding:NSUTF8StringEncoding];

    NSData *decryptedData = aesDecryptData(contentData, keyData);

    return [[NSString alloc] initWithData:decryptedData encoding:NSUTF8StringEncoding];

}

NSData * aesEncryptData(NSData *contentData, NSData *keyData) {

    NSString *hint = [NSString stringWithFormat:@"The key size of AES-%lu should be %lu bytes!", kKeySize * , kKeySize];

    NSCAssert(keyData.length == kKeySize, hint);

    return cipherOperation(contentData, keyData, kCCEncrypt);

}

NSData * aesDecryptData(NSData *contentData, NSData *keyData) {

    NSString *hint = [NSString stringWithFormat:@"The key size of AES-%lu should be %lu bytes!", kKeySize * , kKeySize];

    NSCAssert(keyData.length == kKeySize, hint);

    return cipherOperation(contentData, keyData, kCCDecrypt);

}

调用方式：

1、引入#import "AESCipher.h" 文件

2、

NSString *userID = aesEncryptHexStr([NSString stringWithFormat:@"%@;%@",userID,userPassword],@"ABCDEFGHIJKLMNOP");

JAVA服务端解密：

=====================================================================================================================

import java.security.InvalidAlgorithmParameterException;

import java.security.InvalidKeyException;

import java.security.NoSuchAlgorithmException;

import sun.misc.BASE64Decoder;

import sun.misc.BASE64Encoder;

import javax.crypto.BadPaddingException;

import javax.crypto.Cipher;

import javax.crypto.IllegalBlockSizeException;

import javax.crypto.NoSuchPaddingException;

import javax.crypto.spec.IvParameterSpec;

import javax.crypto.spec.SecretKeySpec;

import java.io.UnsupportedEncodingException;

public class SymmetricEncoder {

    private static final String IV_STRING = "A-16-Byte-String";

    private static final String charset = "UTF-8";

    public static String aesEncryptString(String content, String key)

            throws InvalidKeyException, NoSuchAlgorithmException,

            NoSuchPaddingException, InvalidAlgorithmParameterException,

            IllegalBlockSizeException, BadPaddingException,

            UnsupportedEncodingException {

        byte[] contentBytes = content.getBytes(charset);

        byte[] keyBytes = key.getBytes(charset);

        byte[] encryptedBytes = aesEncryptBytes(contentBytes, keyBytes);

        //Encoder encoder = Base64.getEncoder();

        return new BASE64Encoder().encode((encryptedBytes));

    }

    public static String aesDecryptString(String content, String key)

            throws Exception {

        //Decoder decoder = Base64.getDecoder();

        byte[] encryptedBytes = new BASE64Decoder().decodeBuffer(content);

        byte[] keyBytes = key.getBytes(charset);

        byte[] decryptedBytes = aesDecryptBytes(encryptedBytes, keyBytes);

        return new String(decryptedBytes, charset);

    }

    public static byte[] aesEncryptBytes(byte[] contentBytes, byte[] keyBytes)

            throws NoSuchAlgorithmException, NoSuchPaddingException,

            InvalidKeyException, InvalidAlgorithmParameterException,

            IllegalBlockSizeException, BadPaddingException,

            UnsupportedEncodingException {

        return cipherOperation(contentBytes, keyBytes, Cipher.ENCRYPT_MODE);

    }

    public static byte[] aesDecryptBytes(byte[] contentBytes, byte[] keyBytes)

            throws NoSuchAlgorithmException, NoSuchPaddingException,

            InvalidKeyException, InvalidAlgorithmParameterException,

            IllegalBlockSizeException, BadPaddingException,

            UnsupportedEncodingException {

        return cipherOperation(contentBytes, keyBytes, Cipher.DECRYPT_MODE);

    }

    private static byte[] cipherOperation(byte[] contentBytes, byte[] keyBytes,

            int mode) throws UnsupportedEncodingException,

            NoSuchAlgorithmException, NoSuchPaddingException,

            InvalidKeyException, InvalidAlgorithmParameterException,

            IllegalBlockSizeException, BadPaddingException {

        SecretKeySpec secretKey = new SecretKeySpec(keyBytes, "AES");

        byte[] initParam = IV_STRING.getBytes(charset);

        IvParameterSpec ivParameterSpec = new IvParameterSpec(initParam);

        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");

        cipher.init(mode, secretKey, ivParameterSpec);

        return cipher.doFinal(contentBytes);

    }

    /**

     * 十六进制转换字符串

     * @param String str Byte字符串(Byte之间无分隔符 如:[616C6B])

     * @return String 对应的字符串

     */

    public static String hexStr2Str(String hexStr)

    {

        String str = "0123456789ABCDEF";

        char[] hexs = hexStr.toCharArray();

        byte[] bytes = new byte[hexStr.length() / 2];

        int n;    

        for (int i = 0; i < bytes.length; i++)

        {

            n = str.indexOf(hexs[2 * i]) * 16;

            n += str.indexOf(hexs[2 * i + 1]);

            bytes[i] = (byte) (n & 0xff);

        }

        return new String(bytes);

    }public static String aesDecryptHexStr(String aecStr,String key) throws Exception{

        return SymmetricEncoder.aesDecryptString(SymmetricEncoder.hexStr2Str(aecStr),key);

    }

    public static void main(String args[]){

        try {

            String ss="364453613168592F4E68532F4F75306C7A72585459754F62686E43777475377733363339476278514468773D";

            System.out.println(SymmetricEncoder.aesDecryptHexStr(ss, "ABCDEFGHIJKLMNOP"));

        } catch (Exception e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

    }

}

码农公寓

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