我在网上搜索了很多文章,但却找不到 [iOS 3DES with ECB return half correct data 在Stackoverflow上,但是当我复制本文中的代码时,编译器会返回与在线加密工具中获得的不同的加密结果。
任何人都可以帮助我吗?
感谢
另外,我无法真正阅读obj-c。刚从javascript
和PHP
开始转向。
===========编辑===========
现在,我使用swift 1.2将我的方法更改为AES。代码如下所示(iv和密钥保持静态以进行测试):
let key:String = "12345678901234567890123456789012"
let iv:String = "12345678901234567890123456789012"
let keyData: NSData! = (key as NSString).dataUsingEncoding(NSUTF8StringEncoding) as NSData!
let keyBytes = UnsafePointer<UInt8>(keyData.bytes)
let keyLength = size_t(kCCKeySizeAES256)
let plainData: NSData! = (plainText as NSString).dataUsingEncoding(NSUTF8StringEncoding) as NSData!
let dataLength = size_t(plainData.length)
let dataBytes = UnsafePointer<UInt8>(plainData.bytes)
var bufferData = NSMutableData(length: Int(dataLength) + kCCBlockSizeAES128)!
var bufferPointer = UnsafeMutablePointer<UInt8>(bufferData.mutableBytes)
let bufferLength = size_t(bufferData.length)
let operation: CCOperation = UInt32(kCCEncrypt)
let algoritm: CCAlgorithm = UInt32(kCCAlgorithmAES128)
let options: CCOptions = UInt32(kCCOptionPKCS7Padding)
let ivData: NSData! = (iv as NSString).dataUsingEncoding(NSUTF8StringEncoding) as NSData!
let ivPointer = UnsafePointer<UInt8>(ivData.bytes)
var numBytesEncrypted: size_t = 0
var cryptStatus = CCCrypt(operation, algoritm, options, keyBytes, keyLength, ivPointer, dataBytes, dataLength, bufferPointer, bufferLength, &numBytesEncrypted)
这是我的PHP代码:
function addPkcs7Padding($string) {
$cipher = MCRYPT_RIJNDAEL_256;
$mode = MCRYPT_MODE_CBC;
$blocksize = mcrypt_get_iv_size($cipher, $mode);
$len = strlen($string);
$pad = $blocksize - ($len % $blocksize);
$string .= str_repeat(chr($pad), $pad);
return $string;
}
function aes256cbcEncrypt($str, $iv, $key ) {
return base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, addPkcs7Padding($str) , MCRYPT_MODE_CBC, $iv));
}
答案 0 :(得分:0)
您没有将加密数据的长度设置为引用返回的值:numBytesEncrypted
。在这种情况下:bufferData.length = numBytesEncrypted
。
MCRYPT_RIJNDAEL_256指定256位的块大小,AES仅使用128的块大小,将mcrypt中的大小更改为MCRYPT_RIJNDAEL_128。注意:块大小与密钥大小不同。
iv大小是块大小(128位/ 16字节)。
显示示例输入和输出数据以获得更多帮助。
对于Swift示例SO answer: