我真的......真的需要帮助...........
- 更新 -
我需要帮助，因为我的java函数与iOS 3DES函数相比给出了不同的结果。我发布了ios和java的代码;当指定的明文是“tutor.1”并且MD5键是“spO13 + QLZCRAe93pIXMXLg ==”时（MD5，显然，两者都相同）。
JAVA 3DES （简短）
public static String encrypt(String plaintext, String enctoken){
if(enctoken == null)
enctoken = "sfdjf48mdfdf3054";
String encrypted = null;
byte[] plaintextByte = EncodingUtils.getBytes(plaintext,"UTF-8");
byte[] hash = Connessione.md5(enctoken);
Log.i("ENCRYPT", "MD5: "+Base64.encodeToString(hash, 0));
try {
Cipher cipher = Cipher.getInstance("DESEDE/ECB/PKCS5Padding");
SecretKeySpec myKey = new SecretKeySpec(hash,"DESede");
cipher.init(Cipher.ENCRYPT_MODE, myKey);
try {
byte[] encryptedPlainText = cipher.doFinal(plaintextByte);
encrypted = Base64.encodeToString(encryptedPlainText, 0);
Log.i("ENCRYPT", "Pwd encrypted: "+encrypted);
return encrypted;
} catch (IllegalBlockSizeException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (BadPaddingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} catch (NoSuchAlgorithmException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (NoSuchPaddingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InvalidKeyException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return "";
}
结果： R4mXAaHcFxM =
IOS 3DES - 再次更新
// key value in parameters is MD5 value! It is the same for both version
+ (NSString *) encrypt:(NSString *) dataToEncrypt withKey:(NSString*) key{
NSData *data = [dataToEncrypt dataUsingEncoding:NSUTF8StringEncoding];
NSData *mData = [key dataUsingEncoding:NSUTF8StringEncoding];
CCCryptorStatus ccStatus = kCCSuccess;
// Begin to calculate bytesNeeded....
size_t bytesNeeded = 0;
ccStatus = CCCrypt(kCCEncrypt,
kCCAlgorithm3DES,
kCCOptionECBMode | kCCOptionPKCS7Padding,
[mData bytes],
[mData length],
nil,
[data bytes],
[data length],
NULL,
0,
&bytesNeeded);
if(kCCBufferTooSmall != ccStatus){
NSLog(@"Here it must return BUFFER TOO SMALL !!");
return nil;
}
// .....End
// Now i do the real Crypting
char* cypherBytes = malloc(bytesNeeded);
size_t bufferLength = bytesNeeded;
if(NULL == cypherBytes)
NSLog(@"cypherBytes NULL");
ccStatus = CCCrypt(kCCEncrypt,
kCCAlgorithm3DES,
kCCOptionECBMode | kCCOptionPKCS7Padding,
[mData bytes],
[mData length],
nil,
[data bytes],
[data length],
cypherBytes,
bufferLength,
&bytesNeeded);
if(kCCSuccess != ccStatus){
NSLog(@"kCCSuccess NO!");
return nil;
}
return [Base64 encode:[NSData dataWithBytes:cypherBytes length:bufferLength]];
}
结果： YBAva5J2khY =
我需要iOS版本返回与Java版本相同的结果。
我在这里找到了Base64类：http://www.imthi.com/blog/programming/iphone-sdk-base64-encode-decode.php
我做错了什么？
感谢您的帮助和时间
答案 0 :(得分：0)
好的，我开始使用DES加密更容易。另外，我正在跳过Base64和密钥上的哈希 - 一旦你确定加密工作正常就可以轻松添加，并且可以一次添加一个。
以下是iOS代码：
#import <UIKit/UIKit.h>
#import <CommonCrypto/CommonCrypto.h>
#import <CommonCrypto/CommonCryptor.h>
int main(int argc, char *argv[])
{
@autoreleasepool {
BOOL encryptOrDecrypt = kCCEncrypt;
NSString *plainText = @"abcdefghijklmnop";
NSString *key = @"01234567";
const void *vplainText;
size_t plainTextBufferSize;
NSData *tempData = [plainText dataUsingEncoding:NSASCIIStringEncoding];
plainTextBufferSize = [tempData length];
vplainText = [tempData bytes];
CCCryptorStatus ccStatus;
uint8_t *bufferPtr = NULL;
size_t bufferPtrSize = 0;
size_t movedBytes = 0;
bufferPtrSize = [plainText length];
if (bufferPtrSize % 8) {
bufferPtrSize += 8 - (bufferPtrSize % 8);
}
// bufferPtrSize = (plainTextBufferSize + kCCBlockSize3DES) & ~(kCCBlockSize3DES - 1);
bufferPtr = malloc( bufferPtrSize * sizeof(uint8_t) + 1); // To null-terminate a string if req'd
memset((void *)bufferPtr, 0x0, bufferPtrSize+1);
NSData *_keyData = [key dataUsingEncoding:NSASCIIStringEncoding];
NSLog(@"key byte is %s", [_keyData bytes]);
// Initialization vector; dummy in this case 0's.
// uint8_t iv[kCCBlockSize3DES];
// memset((void *) iv, 0x0, (size_t) sizeof(iv));
ccStatus = CCCrypt(encryptOrDecrypt,
kCCAlgorithmDES,
kCCOptionECBMode, //kCCOptionPKCS7Padding | kCCOptionECBMode,
(const void *)[_keyData bytes], //key
kCCKeySizeDES,
nil, //iv,
vplainText, //plainText,
plainTextBufferSize,
(void *)bufferPtr,
bufferPtrSize,
&movedBytes);
//if (ccStatus == kCCSuccess) NSLog(@"SUCCESS");
/*else*/
switch (ccStatus) {
case kCCParamError:
NSLog(@"PARAM ERROR");
break;
case kCCBufferTooSmall:
NSLog(@"BUFFER TOO SMALL");
break;
case kCCMemoryFailure:
NSLog(@"MEMORY FAILURE");
break;
case kCCAlignmentError:
NSLog(@"ALIGNMENT ERROR");
break;
case kCCDecodeError:
NSLog(@"DECODE ERROR");
break;
case kCCUnimplemented:
NSLog(@"UNIMPLEMENTED");
break;
default:
NSLog(@"encrypt seems to have worked");
break;
}
for (size_t i=0; i<movedBytes; i++) {
printf("%02x ", (int) bufferPtr[i]);
}
printf("\n");
return UIApplicationMain(argc, argv, nil, NSStringFromClass([FAAppDelegate class]));
}
}
这是Java代码：
import java.io.UnsupportedEncodingException;
import java.security.InvalidKeyException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import javax.xml.bind.DatatypeConverter;
public class DesRun {
/**
* @param args
*/
public static void main(String[] args) {
String theKey = "01234567";
String message = "abcdefghijklmnop";
Cipher ecipher, dcipher;
try {
// generate secret key using DES algorithm
SecretKeySpec key = new SecretKeySpec(theKey.getBytes("UTF-8"), "DES");
ecipher = Cipher.getInstance("DES");
dcipher = Cipher.getInstance("DES");
// initialize the ciphers with the given key
ecipher.init(Cipher.ENCRYPT_MODE, key);
dcipher.init(Cipher.DECRYPT_MODE, key);
byte[] encrypted = ecipher.doFinal(message.getBytes("UTF-8"));
System.out.println(DatatypeConverter.printHexBinary(encrypted));
String decrypted = new String(dcipher.doFinal(encrypted), "UTF-8");
System.out.println("Decrypted: " + decrypted);
}
catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
两者都打印出加密数据的十六进制字节，并且他们同意。
现在应该（相对）轻松地转移到3DES。
只有当你有3DES同意iOS和Java时，才会开始在键上添加散列。
答案 1 :(得分：0)
发现错误。 keydata编码不同