PHP&Java&Objective-C互通DES加密

Posted 刘小莫随笔

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废话不多说,直接上demo

php的:

class MoDES {

  

    /**

     * 加密

     * @param string $str 要处理的字符串

     * @param string $key 加密Key,为8个字节长度

     * @return string

     */

    public function encode($str, $key) {

        $size = mcrypt_get_block_size(MCRYPT_DES, MCRYPT_MODE_CBC);

        $str = $this->pkcs5Pad($str, $size);

        $aaa=mcrypt_encrypt(MCRYPT_DES,$key,$str,MCRYPT_MODE_CBC,$key);

        $ret = base64_encode($aaa);

        return $ret;

    }

  

    /**

     * 解密

     * @param string $str 要处理的字符串

     * @param string $key 解密Key,为8个字节长度

     * @return string

     */

    public function decode($str, $key) {

        $strBin = base64_decode($str);

        $str = mcrypt_decrypt(MCRYPT_DES,$key,$strBin,MCRYPT_MODE_CBC,$key);

        $str = $this->pkcs5Unpad($str);

        return $str;

    }


    function pkcs5Pad($text, $blocksize) {

        $pad = $blocksize - (strlen($text) % $blocksize);

        return $text . str_repeat(chr($pad), $pad);

    }

  

    function pkcs5Unpad($text) {

        $pad = ord($text {strlen($text) - 1});

        if ($pad > strlen($text))

            return false;

  

        if (strspn($text, chr($pad), strlen($text) - $pad) != $pad)

            return false;

  

        return substr($text, 0, - 1 * $pad);

    }

}


然后是java的demo:


package com.example.aric.test;

  

import javax.crypto.Cipher;

import javax.crypto.SecretKey;

import javax.crypto.SecretKeyFactory;

import javax.crypto.spec.DESKeySpec;

import javax.crypto.spec.IvParameterSpec;

  

import android.util.Base64;

  

public class DES {

  

    public final static String DES_KEY_STRING = "ABSujsuu";

      

    public static String encrypt(String message, String key) throws Exception {

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

  

        DESKeySpec desKeySpec = new DESKeySpec(key.getBytes("UTF-8"));

  

        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");

        SecretKey secretKey = keyFactory.generateSecret(desKeySpec);

        IvParameterSpec iv = new IvParameterSpec(key.getBytes("UTF-8"));

        cipher.init(Cipher.ENCRYPT_MODE, secretKey, iv);

  

        return encodeBase64(cipher.doFinal(message.getBytes("UTF-8")));

    }

  

    public static String decrypt(String message, String key) throws Exception {

  

        byte[] bytesrc = decodeBase64(message);//convertHexString(message);

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

        DESKeySpec desKeySpec = new DESKeySpec(key.getBytes("UTF-8"));

        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");

        SecretKey secretKey = keyFactory.generateSecret(desKeySpec);

        IvParameterSpec iv = new IvParameterSpec(key.getBytes("UTF-8"));

  

        cipher.init(Cipher.DECRYPT_MODE, secretKey, iv);

  

        byte[] retByte = cipher.doFinal(bytesrc);

        return new String(retByte);

    }

  

    public static byte[] convertHexString(String ss) {

        byte digest[] = new byte[ss.length() / 2];

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

            String byteString = ss.substring(2 * i, 2 * i + 2);

            int byteValue = Integer.parseInt(byteString, 16);

            digest[i] = (byte) byteValue;

        }

  

        return digest;

    }

  

    public static String toHexString(byte b[]) {

        StringBuffer hexString = new StringBuffer();

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

            String plainText = Integer.toHexString(0xff & b[i]);

            if (plainText.length() < 2)

                plainText = "0" + plainText;

            hexString.append(plainText);

        }

  

        return hexString.toString();

    }

  

      

    public static String encodeBase64(byte[] b) {

        return Base64.encodeToString(b, Base64.DEFAULT);

    }

      

    public static byte[] decodeBase64(String base64String) {

        return Base64.decode(base64String, Base64.DEFAULT);

    }

}


再来Objective-C 的demo:


#import <Foundation/Foundation.h>

#import <CommonCrypto/CommonDigest.h>

#import <CommonCrypto/CommonCryptor.h>

  

@interface JoDes : NSObject

  

+ (NSString *) encode:(NSString *)str key:(NSString *)key;

+ (NSString *) decode:(NSString *)str key:(NSString *)key;

  

@end

  

  

@interface JoDes()

  

+ (NSString *) encodeBase64WithString:(NSString *)strData;

+ (NSString *) encodeBase64WithData:(NSData *)objData;

+ (NSData *) decodeBase64WithString:(NSString *)strBase64;

  

+ (NSString *)doCipher:(NSString *)sTextIn key:(NSString *)sKey

                  context:(CCOperation)encryptOrDecrypt;

  

@end

  

@implementation JoDes

  

+ (NSString *) encode:(NSString *)str key:(NSString *)key

{

    // doCipher 不能编汉字,所以要进行 url encode

    NSMutableString* str1 = [JoDes urlEncode:str];

    NSMutableString* encode = [NSMutableString stringWithString:[JoDes doCipher:str1 key:key context:kCCEncrypt]];

    [JoDes formatSpecialCharacters:encode];

    return encode;

}

  

+ (NSString *) decode:(NSString *)str key:(NSString *)key

{

    NSMutableString *str1 = [NSMutableString stringWithString:str];

    [JoDes reformatSpecialCharacters:str1];

    NSString *rt = [JoDes doCipher:str1 key:key context:kCCDecrypt];

    return rt;

}

  

+ (NSMutableString *)urlEncode:(NSString*)str

{

    NSMutableString* encodeStr = [NSMutableString stringWithString:[str stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];

    [encodeStr replaceOccurrencesOfString:@"+" withString:@"%2B" options:NSWidthInsensitiveSearch range:NSMakeRange(0, [encodeStr length])];

    [encodeStr replaceOccurrencesOfString:@"/" withString:@"%2F" options:NSWidthInsensitiveSearch range:NSMakeRange(0, [encodeStr length])];

    return encodeStr;

}

  

+ (void)formatSpecialCharacters:(NSMutableString *)str

{

    [str replaceOccurrencesOfString:@"+" withString:@"$$" options:NSWidthInsensitiveSearch range:NSMakeRange(0, [str length])];

    [str replaceOccurrencesOfString:@"/" withString:@"@@" options:NSWidthInsensitiveSearch range:NSMakeRange(0, [str length])];

}

  

  

+ (void)reformatSpecialCharacters:(NSMutableString *)str

{

    [str replaceOccurrencesOfString:@"$$" withString:@"+" options:NSWidthInsensitiveSearch range:NSMakeRange(0, [str length])];

    [str replaceOccurrencesOfString:@"@@" withString:@"/" options:NSWidthInsensitiveSearch range:NSMakeRange(0, [str length])];

}

  

+ (NSString *)encodeBase64WithString:(NSString *)strData {

    return [JoDes encodeBase64WithData:[strData dataUsingEncoding:NSUTF8StringEncoding]];

}

  

  

+ (NSString *)encodeBase64WithData:(NSData *)objData {

    NSString *encoding = nil;

    unsigned char *encodingBytes = NULL;

    @try {

        static char encodingTable[64] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";

        static NSUInteger paddingTable[] = {0,2,1};

          

        NSUInteger dataLength = [objData length];

        NSUInteger encodedBlocks = (dataLength * 8) / 24;

        NSUInteger padding = paddingTable[dataLength % 3];

        if( padding > 0 ) encodedBlocks++;

        NSUInteger encodedLength = encodedBlocks * 4;

          

        encodingBytes = malloc(encodedLength);

        if( encodingBytes != NULL ) {

            NSUInteger rawBytesToProcess = dataLength;

            NSUInteger rawBaseIndex = 0;

            NSUInteger encodingBaseIndex = 0;

            unsigned char *rawBytes = (unsigned char *)[objData bytes];

            unsigned char rawByte1, rawByte2, rawByte3;

            while( rawBytesToProcess >= 3 ) {

                rawByte1 = rawBytes[rawBaseIndex];

                rawByte2 = rawBytes[rawBaseIndex+1];

                rawByte3 = rawBytes[rawBaseIndex+2];

                encodingBytes[encodingBaseIndex] = encodingTable[((rawByte1 >> 2) & 0x3F)];

                encodingBytes[encodingBaseIndex+1] = encodingTable[((rawByte1 << 4) & 0x30) | ((rawByte2 >> 4) & 0x0F) ];

                encodingBytes[encodingBaseIndex+2] = encodingTable[((rawByte2 << 2) & 0x3C) | ((rawByte3 >> 6) & 0x03) ];

                encodingBytes[encodingBaseIndex+3] = encodingTable[(rawByte3 & 0x3F)];

                  

                rawBaseIndex += 3;

                encodingBaseIndex += 4;

                rawBytesToProcess -= 3;

            }

            rawByte2 = 0;

            switch (dataLength-rawBaseIndex) {

                case 2:

                    rawByte2 = rawBytes[rawBaseIndex+1];

                case 1:

                    rawByte1 = rawBytes[rawBaseIndex];

                    encodingBytes[encodingBaseIndex] = encodingTable[((rawByte1 >> 2) & 0x3F)];

                    encodingBytes[encodingBaseIndex+1] = encodingTable[((rawByte1 << 4) & 0x30) | ((rawByte2 >> 4) & 0x0F) ];

                    encodingBytes[encodingBaseIndex+2] = encodingTable[((rawByte2 << 2) & 0x3C) ];

                    // we can skip rawByte3 since we have a partial block it would always be 0

                    break;

            }

            // compute location from where to begin inserting padding, it may overwrite some bytes from the partial block encoding

            // if their value was 0 (cases 1-2).

            encodingBaseIndex = encodedLength - padding;

            while( padding-- > 0 ) {

                encodingBytes[encodingBaseIndex++] = '=';

            }

            encoding = [[NSString alloc] initWithBytes:encodingBytes length:encodedLength encoding:NSASCIIStringEncoding];

        }

    }

    @catch (NSException *exception) {

        encoding = nil;

        NSLog(@"WARNING: error occured while tring to encode base 32 data: %@", exception);

    }

    @finally {

        if( encodingBytes != NULL ) {

            free( encodingBytes );

        }

    }

    return encoding;

      

}

  

+ (NSData *)decodeBase64WithString:(NSString *)strBase64 {

    NSData *data = nil;

    unsigned char *decodedBytes = NULL;

    @try {

#define __ 255

        static char decodingTable[256] = {

            __,__,__,__, __,__,__,__, __,__,__,__, __,__,__,__,  // 0x00 - 0x0F

            __,__,__,__, __,__,__,__, __,__,__,__, __,__,__,__,  // 0x10 - 0x1F

            __,__,__,__, __,__,__,__, __,__,__,62, __,__,__,63,  // 0x20 - 0x2F

            52,53,54,55, 56,57,58,59, 60,61,__,__, __, 0,__,__,  // 0x30 - 0x3F

            __, 0, 1, 2,  3, 4, 5, 6,  7, 8, 9,10, 11,12,13,14,  // 0x40 - 0x4F

            15,16,17,18, 19,20,21,22, 23,24,25,__, __,__,__,__,  // 0x50 - 0x5F

            __,26,27,28, 29,30,31,32, 33,34,35,36, 37,38,39,40,  // 0x60 - 0x6F

            41,42,43,44, 45,46,47,48, 49,50,51,__, __,__,__,__,  // 0x70 - 0x7F

            __,__,__,__, __,__,__,__, __,__,__,__, __,__,__,__,  // 0x80 - 0x8F

            __,__,__,__, __,__,__,__, __,__,__,__, __,__,__,__,  // 0x90 - 0x9F

            __,__,__,__, __,__,__,__, __,__,__,__, __,__,__,__,  // 0xA0 - 0xAF

            __,__,__,__, __,__,__,__, __,__,__,__, __,__,__,__,  // 0xB0 - 0xBF

            __,__,__,__, __,__,__,__, __,__,__,__, __,__,__,__,  // 0xC0 - 0xCF

            __,__,__,__, __,__,__,__, __,__,__,__, __,__,__,__,  // 0xD0 - 0xDF

            __,__,__,__, __,__,__,__, __,__,__,__, __,__,__,__,  // 0xE0 - 0xEF

            __,__,__,__, __,__,__,__, __,__,__,__, __,__,__,__,  // 0xF0 - 0xFF

        };

        strBase64 = [strBase64 stringByReplacingOccurrencesOfString:@"=" withString:@""];

        NSData *encodedData = [strBase64 dataUsingEncoding:NSASCIIStringEncoding];

        unsigned char *encodedBytes = (unsigned char *)[encodedData bytes];

          

        NSUInteger encodedLength = [encodedData length];

        NSUInteger encodedBlocks = (encodedLength+3) >> 2;

        NSUInteger expectedDataLength = encodedBlocks * 3;

          

        unsigned char decodingBlock[4];

          

        decodedBytes = malloc(expectedDataLength);

        if( decodedBytes != NULL ) {

              

            NSUInteger i = 0;

            NSUInteger j = 0;

            NSUInteger k = 0;

            unsigned char c;

            while( i < encodedLength ) {

                c = decodingTable[encodedBytes[i]];

                i++;

                if( c != __ ) {

                    decodingBlock[j] = c;

                    j++;

                    if( j == 4 ) {

                        decodedBytes[k] = (decodingBlock[0] << 2) | (decodingBlock[1] >> 4);

                        decodedBytes[k+1] = (decodingBlock[1] << 4) | (decodingBlock[2] >> 2);

                        decodedBytes[k+2] = (decodingBlock[2] << 6) | (decodingBlock[3]);

                        j = 0;

                        k += 3;

                    }

                }

            }

              

            // Process left over bytes, if any

            if( j == 3 ) {

                decodedBytes[k] = (decodingBlock[0] << 2) | (decodingBlock[1] >> 4);

                decodedBytes[k+1] = (decodingBlock[1] << 4) | (decodingBlock[2] >> 2);

                k += 2;

            } else if( j == 2 ) {

                decodedBytes[k] = (decodingBlock[0] << 2) | (decodingBlock[1] >> 4);

                k += 1;

            }

            data = [[NSData alloc] initWithBytes:decodedBytes length:k];

        }

    }

    @catch (NSException *exception) {

        data = nil;

        NSLog(@"WARNING: error occured while decoding base 32 string: %@", exception);

    }

    @finally {

        if( decodedBytes != NULL ) {

            free( decodedBytes );

        }

    }

    return data;

      

}

  

  

+ (NSString *)doCipher:(NSString *)sTextIn key:(NSString *)sKey

                  context:(CCOperation)encryptOrDecrypt {

    NSStringEncoding EnC = NSUTF8StringEncoding;

      

    NSMutableData *dTextIn;

    if (encryptOrDecrypt == kCCDecrypt) {

        dTextIn = [[JoDes decodeBase64WithString:sTextIn] mutableCopy];

    }

    else{

        dTextIn = [[sTextIn dataUsingEncoding: EnC] mutableCopy];

    }

    NSMutableData * dKey = [[sKey dataUsingEncoding:EnC] mutableCopy];

    [dKey setLength:kCCBlockSizeDES];

    uint8_t *bufferPtr1 = NULL;

    size_t bufferPtrSize1 = 0;

    size_t movedBytes1 = 0;

    //uint8_t iv[kCCBlockSizeDES];

    //memset((void *) iv, 0x0, (size_t) sizeof(iv));

    //    Byte iv[] = {0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF};

    bufferPtrSize1 = ([sTextIn length] + kCCKeySizeDES) & ~(kCCKeySizeDES -1);

    bufferPtr1 = malloc(bufferPtrSize1 * sizeof(uint8_t));

    memset((void *)bufferPtr1, 0x00, bufferPtrSize1);

      

    CCCrypt(encryptOrDecrypt, // CCOperation op

            kCCAlgorithmDES, // CCAlgorithm alg

            kCCOptionPKCS7Padding, // CCOptions options

            [dKey bytes], // const void *key

            [dKey length], // size_t keyLength //

            [dKey bytes], // const void *iv

            [dTextIn bytes], // const void *dataIn

            [dTextIn length],  // size_t dataInLength

            (void *)bufferPtr1, // void *dataOut

            bufferPtrSize1,     // size_t dataOutAvailable

            &movedBytes1);

      

    //[dTextIn release];

    //[dKey release];

      

    NSString * sResult;

    if (encryptOrDecrypt == kCCDecrypt){

        sResult = [[NSString alloc] initWithData:[NSData dataWithBytes:bufferPtr1 length:movedBytes1] encoding:EnC];

        free(bufferPtr1);

    }

    else {

        NSData *dResult = [NSData dataWithBytes:bufferPtr1 length:movedBytes1];

        free(bufferPtr1);

        sResult = [JoDes encodeBase64WithData:dResult];

    }

    return sResult;

}


@end


以上三种语言的加密互通就实现啦,亲测可行!!!



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