我尝试在iOS上使用3DES加密一些内容,必须与Java和.NET的结果匹配。
Java代码:
public class EncryptionHelper {
// Encrypts string and encode in Base64
public static String encryptText(String plainText,String key, String IV) throws Exception {
// ---- Use specified 3DES key and IV from other source --------------
byte[] plaintext = plainText.getBytes();//input
byte[] tdesKeyData = key.getBytes();// your encryption key
byte[] myIV = IV.getBytes();// initialization vector
Cipher c3des = Cipher.getInstance("DESede/CBC/PKCS5Padding");
SecretKeySpec myKey = new SecretKeySpec(tdesKeyData, "DESede");
IvParameterSpec ivspec = new IvParameterSpec(myIV);
c3des.init(Cipher.ENCRYPT_MODE, myKey, ivspec);
byte[] cipherText = c3des.doFinal(plaintext);
String encryptedString = Base64.encodeToString(cipherText,
Base64.DEFAULT);
// return Base64Coder.encodeString(new String(cipherText));
return encryptedString;
}
需要翻译的内容:
}
对应iOS代码如下:
-(NSString*)new3DESwithoperand:(NSString*)plaintext encryptOrDecrypt:(CCOperation)encryptorDecrypt key:(NSString*)key initVec:(NSString*)initVec
{
NSData* data = [plaintext dataUsingEncoding:NSUTF8StringEncoding];
const void *vplainText = [data bytes];;
size_t plainTextBufferSize = [data length];
NSLog(@"%@, Length: %u",[data description],[data length]);
size_t bufferPtrSize = (plainTextBufferSize + kCCBlockSize3DES) & ~(kCCBlockSize3DES - 1);
NSLog(@"%zu, sizof of uint8_t: %zu",bufferPtrSize, sizeof(uint8_t));
size_t movedBytes = 0;
uint8_t *bufferPtr = malloc( bufferPtrSize * sizeof(uint8_t));
NSLog(@"%zu",sizeof(bufferPtr));
memset((void*)bufferPtr, 0x0, bufferPtrSize);
NSLog(@"%zu",sizeof(bufferPtr));
const void * vkey = [[NSData base64DataFromString:key] bytes];
const void *vinitVec = [[NSData base64DataFromString:initVec] bytes];
NSLog(@"vinitvec: %@",[[NSData base64DataFromString:initVec] description]);
CCCryptorStatus ccStatus;
ccStatus = CCCrypt(encryptorDecrypt,
kCCAlgorithm3DES,
kCCOptionPKCS7Padding & kCCModeCBC,
vkey,
kCCKeySize3DES,
vinitVec,
vplainText,
plainTextBufferSize,
(void*)bufferPtr,
bufferPtrSize,
&movedBytes);
NSData* result = [NSData dataWithBytes:(const void*)bufferPtr length:(NSUInteger)movedBytes];
NSString* str = [NSString base64StringFromData:result length:result.length];
NSLog(@"%@",str);
return str;
这段代码成功地加密和解密了一个字符串。但是,它的结果与.NET和Java不匹配。
谢谢。