De3加密在安卓、Ios 和Java 平臺(tái)的實(shí)現(xiàn)(轉(zhuǎn))

加密這種事,現(xiàn)在很常用。但是如何不易被被人破解就要下功夫。

普通網(wǎng)上的des3加密,其實(shí)比較容易被別人強(qiáng)行爆破出,但是如果密鑰也是動(dòng)態(tài)生成的話就比較方便。(通過(guò)自己的密碼本來(lái)隨機(jī)創(chuàng)建加密解密)。

我現(xiàn)在先附上普通的des加密,這個(gè)是借鑒與其他地方,侵刪。

DES簡(jiǎn)介:

DES全稱為Data Encryption Standard,即數(shù)據(jù)加密標(biāo)準(zhǔn),是一種使用密鑰加密的塊算法, 算法的入口參數(shù)有三個(gè):Key、Data、Mode。

Key:為7個(gè)字節(jié)共56位,是DES算法的工作密鑰;

Data:為8個(gè)字節(jié)64位,是要被加密或被解密的數(shù)據(jù);

Mode:為DES的工作方式,有兩種:加密或解密。

3DES簡(jiǎn)介:

3DES(或稱為T(mén)riple DES)是三重?cái)?shù)據(jù)加密算法(TDEA,Triple Data Encryption Algorithm)塊密碼的通稱。它相當(dāng)于是對(duì)每個(gè)數(shù)據(jù)塊應(yīng)用三次DES加密算法。由于計(jì)算機(jī)運(yùn)算能力的增強(qiáng),原版DES密碼的密鑰長(zhǎng)度變得容易被暴力破解;3DES即是設(shè)計(jì)用來(lái)提供一種相對(duì)簡(jiǎn)單的方法,即通過(guò)增加DES的密鑰長(zhǎng)度來(lái)避免類似的攻擊,而不是設(shè)計(jì)一種全新的塊密碼算法。因此比起最初的DES,3DES更為安全。

加密實(shí)例:

java版

package com.v1.linxun.portal.utils;
 
import java.security.Key;
 
import javax.crypto.Cipher;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESedeKeySpec;
import javax.crypto.spec.IvParameterSpec;
 
/**
 * 3DES加密工具類
 */
public class Des3Util {
       // 密鑰 長(zhǎng)度不得小于24
       private final static String secretKey = "123456789012345678901234" ;
       // 向量 可有可無(wú) 終端后臺(tái)也要約定
       private final static String iv = "01234567";
       // 加解密統(tǒng)一使用的編碼方式
       private final static String encoding = "utf-8";
 
       /**
       * 3DES加密
       *
       * @param plainText
       *            普通文本
       * @return
       * @throws Exception
       */
       public static String encode(String plainText) throws Exception {
            Key deskey = null;
            DESedeKeySpec spec = new DESedeKeySpec(secretKey .getBytes());
            SecretKeyFactory keyfactory = SecretKeyFactory.getInstance( "desede");
             deskey = keyfactory.generateSecret( spec);
 
            Cipher cipher = Cipher.getInstance( "desede/CBC/PKCS5Padding");
            IvParameterSpec ips = new IvParameterSpec( iv.getBytes());
             cipher.init(Cipher. ENCRYPT_MODE, deskey, ips);
             byte[] encryptData = cipher.doFinal( plainText.getBytes( encoding));
             return Base64. encode( encryptData);
      }
 
       /**
       * 3DES解密
       *
       * @param encryptText
       *            加密文本
       * @return
       * @throws Exception
       */
       public static String decode(String encryptText) throws Exception {
            Key deskey = null;
            DESedeKeySpec spec = new DESedeKeySpec( secretKey.getBytes());
            SecretKeyFactory keyfactory = SecretKeyFactory.getInstance( "desede");
             deskey = keyfactory. generateSecret( spec);
            Cipher cipher = Cipher.getInstance( "desede/CBC/PKCS5Padding" );
            IvParameterSpec ips = new IvParameterSpec( iv.getBytes());
             cipher. init(Cipher. DECRYPT_MODE, deskey, ips);
 
             byte[] decryptData = cipher. doFinal(Base64. decode(encryptText ));
 
             return new String( decryptData, encoding);
      }
      
       public static void main(String args[]) throws Exception{
            String str = "你好" ;
            System. out.println( "----加密前-----:" + str );
            String encodeStr = Des3Util. encode( str);
            System. out.println( "----加密后-----:" + encodeStr );
            System. out.println( "----解密后-----:" + Des3Util.decode( encodeStr));
      }
}

Android版:

package com.inn.test;
 
import java.security.Key;
 
import javax.crypto.Cipher;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESedeKeySpec;
import javax.crypto.spec.IvParameterSpec;
 
import android.util.Base64;
 
/**
 * Android 3DES加密工具類
 */
public class AndroidDes3Util {
      
       // 密鑰 長(zhǎng)度不得小于24
       private final static String secretKey = "123456789012345678901234" ;
       // 向量 可有可無(wú) 終端后臺(tái)也要約定
       private final static String iv = "01234567" ;
       // 加解密統(tǒng)一使用的編碼方式
       private final static String encoding = "utf-8" ;
 
       /**
       * 3DES加密
       *
       * @param plainText
       *            普通文本
       * @return
       * @throws Exception
       */
       public static String encode(String plainText) throws Exception {
            Key deskey = null ;
            DESedeKeySpec spec = new DESedeKeySpec(secretKey .getBytes());
            SecretKeyFactory keyfactory = SecretKeyFactory.getInstance( "desede");
            deskey = keyfactory.generateSecret(spec);
 
            Cipher cipher = Cipher.getInstance( "desede/CBC/PKCS5Padding");
            IvParameterSpec ips = new IvParameterSpec( iv.getBytes());
            cipher.init(Cipher. ENCRYPT_MODE , deskey, ips);
             byte [] encryptData = cipher.doFinal(plainText.getBytes(encoding ));
             return Base64.encodeToString(encryptData,Base64. DEFAULT );
      }
 
       /**
       * 3DES解密
       *
       * @param encryptText
       *            加密文本
       * @return
       * @throws Exception
       */
       public static String decode(String encryptText) throws Exception {
            Key deskey = null ;
            DESedeKeySpec spec = new DESedeKeySpec( secretKey.getBytes());
            SecretKeyFactory keyfactory = SecretKeyFactory.getInstance( "desede" );
            deskey = keyfactory. generateSecret(spec);
            Cipher cipher = Cipher.getInstance( "desede/CBC/PKCS5Padding" );
            IvParameterSpec ips = new IvParameterSpec( iv.getBytes());
            cipher. init(Cipher. DECRYPT_MODE, deskey, ips);
 
             byte [] decryptData = cipher.doFinal(Base64. decode(encryptText, Base64. DEFAULT));
 
             return new String (decryptData, encoding);
      }
}

IOS版:


//
//  DES3EncryptUtil.h
//  DES3加解密工具
//
//  Created by xc on 15/12/18.
//  Copyright ? 2015年 xc. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface DES3EncryptUtil : NSObject

// 加密方法
+ (NSString*)encrypt:(NSString*)plainText;

// 解密方法
+ (NSString*)decrypt:(NSString*)encryptText;

@end

//
//  DES3EncryptUtil.m
//  DES3加解密工具
//  Created by xc on 15/12/18.
//  Copyright ? 2015年 xc. All rights reserved.

#import <Foundation/Foundation.h>
#import <CommonCrypto/CommonCryptor.h>
#import "MyBase64.h"

//秘鑰
#define gkey            @"xiangchao@qq.comrnnchina"
//向量
#define gIv             @"01234567"

@implementation DES3EncryptUtil : NSObject

// 加密方法
+ (NSString*)encrypt:(NSString*)plainText {
    NSData* data = [plainText dataUsingEncoding:NSUTF8StringEncoding];
    size_t plainTextBufferSize = [data length];
    const void *vplainText = (const void *)[data bytes];
    
    CCCryptorStatus ccStatus;
    uint8_t *bufferPtr = NULL;
    size_t bufferPtrSize = 0;
    size_t movedBytes = 0;
    
    bufferPtrSize = (plainTextBufferSize + kCCBlockSize3DES) & ~(kCCBlockSize3DES - 1);
    bufferPtr = malloc( bufferPtrSize * sizeof(uint8_t));
    memset((void *)bufferPtr, 0x0, bufferPtrSize);
    
    const void *vkey = (const void *) [gkey UTF8String];
    const void *vinitVec = (const void *) [gIv UTF8String];
    
    ccStatus = CCCrypt(kCCEncrypt,
                       kCCAlgorithm3DES,
                       kCCOptionPKCS7Padding,
                       vkey,
                       kCCKeySize3DES,
                       vinitVec,
                       vplainText,
                       plainTextBufferSize,
                       (void *)bufferPtr,
                       bufferPtrSize,
                       &movedBytes);
    
    NSData *myData = [NSData dataWithBytes:(const void *)bufferPtr length:(NSUInteger)movedBytes];
    NSString *result = [MyBase64 base64EncodedStringFrom:myData];
    return result;
}

// 解密方法
+ (NSString*)decrypt:(NSString*)encryptText {
    NSData *encryptData = [MyBase64 dataWithBase64EncodedString:encryptText];
    size_t plainTextBufferSize = [encryptData length];
    const void *vplainText = [encryptData bytes];
    
    CCCryptorStatus ccStatus;
    uint8_t *bufferPtr = NULL;
    size_t bufferPtrSize = 0;
    size_t movedBytes = 0;
    
    bufferPtrSize = (plainTextBufferSize + kCCBlockSize3DES) & ~(kCCBlockSize3DES - 1);
    bufferPtr = malloc( bufferPtrSize * sizeof(uint8_t));
    memset((void *)bufferPtr, 0x0, bufferPtrSize);
    
    const void *vkey = (const void *) [gkey UTF8String];
    const void *vinitVec = (const void *) [gIv UTF8String];
    
    ccStatus = CCCrypt(kCCDecrypt,
                       kCCAlgorithm3DES,
                       kCCOptionPKCS7Padding,
                       vkey,
                       kCCKeySize3DES,
                       vinitVec,
                       vplainText,
                       plainTextBufferSize,
                       (void *)bufferPtr,
                       bufferPtrSize,
                       &movedBytes);
    
    NSString *result = [[NSString alloc] initWithData:[NSData dataWithBytes:(const void *)bufferPtr
                                                                     length:(NSUInteger)movedBytes] encoding:NSUTF8StringEncoding] ;
    return result;
}

@end

IOS加密工具中會(huì)將加密后的密文 轉(zhuǎn)化程Base64的字符串,用到了Base64編碼工具,如下

//
//  CommonFunc.h
//  PRJ_base64
//
//  Created by wangzhipeng on 12-11-29.
//  Copyright (c) 2012年 com.comsoft. All rights reserved.
//

#import <Foundation/Foundation.h>

#define __BASE64( text )        [CommonFunc base64StringFromText:text]
#define __TEXT( base64 )        [CommonFunc textFromBase64String:base64]

@interface MyBase64 : NSObject

/******************************************************************************
函數(shù)名稱 : + (NSString *)base64StringFromText:(NSString *)text
函數(shù)描述 : 將文本轉(zhuǎn)換為base64格式字符串
輸入?yún)?shù) : (NSString *)text    文本
輸出參數(shù) : N/A
返回參數(shù) : (NSString *)    base64格式字符串
備注信息 :
******************************************************************************/
+ (NSString *)base64StringFromText:(NSString *)text;

/******************************************************************************
函數(shù)名稱 : + (NSString *)base64StringFromText:(NSString *)text
函數(shù)描述 : 將文本轉(zhuǎn)換為base64格式字符串
輸入?yún)?shù) : (NSString *)text    文本
輸出參數(shù) : N/A
返回參數(shù) : (NSString *)    base64格式字符串
備注信息 :
******************************************************************************/
+ (NSString *)base64EncodedStringFrom:(NSData *)data;

/******************************************************************************
函數(shù)名稱 : + (NSString *)textFromBase64String:(NSString *)base64
函數(shù)描述 : 將base64格式字符串轉(zhuǎn)換為文本
輸入?yún)?shù) : (NSString *)base64  base64格式字符串
輸出參數(shù) : N/A
返回參數(shù) : (NSString *)    文本
備注信息 :
******************************************************************************/
+ (NSString *)textFromBase64String:(NSString *)base64;

/******************************************************************************
函數(shù)名稱 : + (NSString *)textFromBase64String:(NSString *)base64
函數(shù)描述 : 將base64格式字符串轉(zhuǎn)換為文本
輸入?yún)?shù) : (NSString *)base64  base64格式字符串
輸出參數(shù) : N/A
返回參數(shù) : (NSString *)    文本
備注信息 :
******************************************************************************/
+ (NSData *)dataWithBase64EncodedString:(NSString *)string;

@end
//
//  CommonFunc.m
//  PRJ_base64
//
//  Created by wangzhipeng on 12-11-29.
//  Copyright (c) 2012年 com.comsoft. All rights reserved.
//

#import "MyBase64.h"

//引入IOS自帶密碼庫(kù)
#import <CommonCrypto/CommonCryptor.h>

//空字符串
#define LocalStr_None   @""

static const char encodingTable[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";

@implementation MyBase64 : NSObject

+ (NSString *)base64StringFromText:(NSString *)text
{
    if (text && ![text isEqualToString:LocalStr_None]) {
        //取項(xiàng)目的bundleIdentifier作為KEY  改動(dòng)了此處
        //NSString *key = [[NSBundle mainBundle] bundleIdentifier];
        NSData *data = [text dataUsingEncoding:NSUTF8StringEncoding];
        //IOS 自帶DES加密 Begin  改動(dòng)了此處
        //data = [self DESEncrypt:data WithKey:key];
        //IOS 自帶DES加密 End
        return [self base64EncodedStringFrom:data];
    }
    else {
        return LocalStr_None;
    }
}

+ (NSString *)textFromBase64String:(NSString *)base64
{
    if (base64 && ![base64 isEqualToString:LocalStr_None]) {
        //取項(xiàng)目的bundleIdentifier作為KEY   改動(dòng)了此處
        //NSString *key = [[NSBundle mainBundle] bundleIdentifier];
        NSData *data = [self dataWithBase64EncodedString:base64];
        //IOS 自帶DES解密 Begin    改動(dòng)了此處
        //data = [self DESDecrypt:data WithKey:key];
        //IOS 自帶DES加密 End
        return [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
    }
    else {
        return LocalStr_None;
    }
}

/******************************************************************************
函數(shù)名稱 : + (NSData *)DESEncrypt:(NSData *)data WithKey:(NSString *)key
函數(shù)描述 : 文本數(shù)據(jù)進(jìn)行DES加密
輸入?yún)?shù) : (NSData *)data
(NSString *)key
輸出參數(shù) : N/A
返回參數(shù) : (NSData *)
備注信息 : 此函數(shù)不可用于過(guò)長(zhǎng)文本
******************************************************************************/
+ (NSData *)DESEncrypt:(NSData *)data WithKey:(NSString *)key
{
    char keyPtr[kCCKeySizeAES256+1];
    bzero(keyPtr, sizeof(keyPtr));
    
    [key getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding];
    
    NSUInteger dataLength = [data length];
    
    size_t bufferSize = dataLength + kCCBlockSizeAES128;
    void *buffer = malloc(bufferSize);
    
    size_t numBytesEncrypted = 0;
    CCCryptorStatus cryptStatus = CCCrypt(kCCEncrypt, kCCAlgorithmDES,
                                          kCCOptionPKCS7Padding | kCCOptionECBMode,
                                          keyPtr, kCCBlockSizeDES,
                                          NULL,
                                          [data bytes], dataLength,
                                          buffer, bufferSize,
                                          &numBytesEncrypted);
    if (cryptStatus == kCCSuccess) {
        return [NSData dataWithBytesNoCopy:buffer length:numBytesEncrypted];
    }
    
    free(buffer);
    return nil;
}

/******************************************************************************
函數(shù)名稱 : + (NSData *)DESEncrypt:(NSData *)data WithKey:(NSString *)key
函數(shù)描述 : 文本數(shù)據(jù)進(jìn)行DES解密
輸入?yún)?shù) : (NSData *)data
(NSString *)key
輸出參數(shù) : N/A
返回參數(shù) : (NSData *)
備注信息 : 此函數(shù)不可用于過(guò)長(zhǎng)文本
******************************************************************************/
+ (NSData *)DESDecrypt:(NSData *)data WithKey:(NSString *)key
{
    char keyPtr[kCCKeySizeAES256+1];
    bzero(keyPtr, sizeof(keyPtr));
    
    [key getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding];
    
    NSUInteger dataLength = [data length];
    
    size_t bufferSize = dataLength + kCCBlockSizeAES128;
    void *buffer = malloc(bufferSize);
    
    size_t numBytesDecrypted = 0;
    CCCryptorStatus cryptStatus = CCCrypt(kCCDecrypt, kCCAlgorithmDES,
                                          kCCOptionPKCS7Padding | kCCOptionECBMode,
                                          keyPtr, kCCBlockSizeDES,
                                          NULL,
                                          [data bytes], dataLength,
                                          buffer, bufferSize,
                                          &numBytesDecrypted);
    
    if (cryptStatus == kCCSuccess) {
        return [NSData dataWithBytesNoCopy:buffer length:numBytesDecrypted];
    }
    
    free(buffer);
    return nil;
}

/******************************************************************************
函數(shù)名稱 : + (NSData *)dataWithBase64EncodedString:(NSString *)string
函數(shù)描述 : base64格式字符串轉(zhuǎn)換為文本數(shù)據(jù)
輸入?yún)?shù) : (NSString *)string
輸出參數(shù) : N/A
返回參數(shù) : (NSData *)
備注信息 :
******************************************************************************/
+ (NSData *)dataWithBase64EncodedString:(NSString *)string
{
    if (string == nil)
        [NSException raise:NSInvalidArgumentException format:nil];
    if ([string length] == 0)
        return [NSData data];
    
    static char *decodingTable = NULL;
    if (decodingTable == NULL)
    {
        decodingTable = malloc(256);
        if (decodingTable == NULL)
            return nil;
        memset(decodingTable, CHAR_MAX, 256);
        NSUInteger i;
        for (i = 0; i < 64; i++)
            decodingTable[(short)encodingTable[i]] = i;
    }
    
    const char *characters = [string cStringUsingEncoding:NSASCIIStringEncoding];
    if (characters == NULL)     //  Not an ASCII string!
        return nil;
    char *bytes = malloc((([string length] + 3) / 4) * 3);
    if (bytes == NULL)
        return nil;
    NSUInteger length = 0;
    
    NSUInteger i = 0;
    while (YES)
    {
        char buffer[4];
        short bufferLength;
        for (bufferLength = 0; bufferLength < 4; i++)
        {
            if (characters[i] == '\0')
                break;
            if (isspace(characters[i]) || characters[i] == '=')
                continue;
            buffer[bufferLength] = decodingTable[(short)characters[i]];
            if (buffer[bufferLength++] == CHAR_MAX)      //  Illegal character!
            {
                free(bytes);
                return nil;
            }
        }
        
        if (bufferLength == 0)
            break;
        if (bufferLength == 1)      //  At least two characters are needed to produce one byte!
        {
            free(bytes);
            return nil;
        }
        
        //  Decode the characters in the buffer to bytes.
        bytes[length++] = (buffer[0] << 2) | (buffer[1] >> 4);
        if (bufferLength > 2)
            bytes[length++] = (buffer[1] << 4) | (buffer[2] >> 2);
        if (bufferLength > 3)
            bytes[length++] = (buffer[2] << 6) | buffer[3];
    }
    
    bytes = realloc(bytes, length);
    return [NSData dataWithBytesNoCopy:bytes length:length];
}

/******************************************************************************
函數(shù)名稱 : + (NSString *)base64EncodedStringFrom:(NSData *)data
函數(shù)描述 : 文本數(shù)據(jù)轉(zhuǎn)換為base64格式字符串
輸入?yún)?shù) : (NSData *)data
輸出參數(shù) : N/A
返回參數(shù) : (NSString *)
備注信息 :
******************************************************************************/
+ (NSString *)base64EncodedStringFrom:(NSData *)data
{
    if ([data length] == 0)
        return @"";
    
    char *characters = malloc((([data length] + 2) / 3) * 4);
    if (characters == NULL)
        return nil;
    NSUInteger length = 0;
    
    NSUInteger i = 0;
    while (i < [data length])
    {
        char buffer[3] = {0,0,0};
        short bufferLength = 0;
        while (bufferLength < 3 && i < [data length])
            buffer[bufferLength++] = ((char *)[data bytes])[i++];
        
        //  Encode the bytes in the buffer to four characters, including padding "=" characters if necessary.
        characters[length++] = encodingTable[(buffer[0] & 0xFC) >> 2];
        characters[length++] = encodingTable[((buffer[0] & 0x03) << 4) | ((buffer[1] & 0xF0) >> 4)];
        if (bufferLength > 1)
            characters[length++] = encodingTable[((buffer[1] & 0x0F) << 2) | ((buffer[2] & 0xC0) >> 6)];
        else characters[length++] = '=';
        if (bufferLength > 2)
            characters[length++] = encodingTable[buffer[2] & 0x3F];
        else characters[length++] = '=';
    }
    
    return [[NSString alloc] initWithBytesNoCopy:characters length:length encoding:NSASCIIStringEncoding freeWhenDone:YES];
}

@end
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