我目前使用的iOS上的三重DES解密如下:三重DES解密iOS中
NSString* plainText = @"My Text";
NSString* keyText = @"cf6f1ed3bf0a156e";
NSData *plainData = [plainText dataUsingEncoding:NSUTF8StringEncoding];
NSData *keyData = [keyText dataUsingEncoding:NSUTF8StringEncoding];
size_t bufferSize = plainData.length + kCCBlockSize3DES;
NSMutableData *cypherData = [NSMutableData dataWithLength:bufferSize];
size_t movedBytes = 0;
CCCryptorStatus ccStatus;
ccStatus = CCCrypt(kCCDecrypt,
kCCAlgorithm3DES,
kCCOptionECBMode,
keyData.bytes,
kCCBlockSize3DES,
NULL,
plainData.bytes,
plainData.length,
cypherData.mutableBytes,
cypherData.length,
&movedBytes);
cypherData.length = movedBytes;
if(ccStatus == kCCSuccess) {
NSLog(@"Data: %@",cypherData);
NSLog(@"Data encoded string: %@",[NSString stringWithUTF8String:[cypherData bytes]]);
NSLog(@"Data encoded: %@",[[NSString alloc] initWithData:cypherData encoding:NSUTF8StringEncoding]);
} else {
NSLog(@"Failed DES decrypt ...");
return nil;
}
不过,我不断收到在控制台以下:
数据: 数据编码的字符串:(null) 数据编码:(null)
有关为何发生这种情况的任何想法?任何人都可以看到任何可能的问题与此代码?
从来没有想过钥匙是一个问题。谢谢您的帮助 – user481610