Question

经过长时间的搜索后，我今天来找你。

我想用特定的方法加密一个单词。

此方法已在Java中实现。我会用客观的C语言或swift得到同样的东西。

我已经探索了几种方法。例如，我尝试运行或RNCryptManager CPCryptController。但我没有得出确凿的结果。

我的java代码如下：

public String encrypt(String texte) {
   byte[] bytePassword = Base64.decode(PASSWORD, Base64.DEFAULT);
   byte[] byteSalt = Base64.decode(SALT, Base64.DEFAULT);
   byte[] bytesIv = Base64.decode(IV, Base64.DEFAULT);
   SecretKeyFactory factory = null;
   factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
   KeySpec spec = new PBEKeySpec(PASSWORD.toCharArray(), byteSalt, NB_ITER_RFC, 128);
   SecretKey temp = null;
   temp = factory.generateSecret(spec);
   byte[] clef = temp.getEncoded();
   Cipher c = Cipher.getInstance("DESede/CBC/PKCS5Padding");
   IvParameterSpec ivParam = new IvParameterSpec(bytesIv);
   c.init(Cipher.ENCRYPT_MODE, temp, ivParam);     
   byte[] encrypted = c.doFinal(texte.getBytes("UTF-8"));
   mdp = Base64.encodeToString(encrypted, Base64.DEFAULT);
   Log.i("MDP CHIFFRE", " = " + mdp);
}

我打算使用https://developer.apple.com/library/mac/#samplecode/CryptoCompatibility/

我现在的代码是

QCCPBKDF2SHA1KeyDerivation * op;
NSString * passwordString;
NSData * saltData;
NSData * expectedKeyData;

passwordString = @ "Hello Cruel World!";
saltData = [@ "Some salt sir?" dataUsingEncoding: NSUTF8StringEncoding];
expectedKeyData = [QHex dataWithHexString: @ "e56c27f5eed251db50a3"];

op = [[QCCPBKDF2SHA1KeyDerivation alloc] initWithPasswordString: passwordString saltData:   saltData]

op.rounds = 1000;
op.derivedKeyLength = 10;

[[ToolCommon sharedInstance] synchronouslyRunOperation: op];

if (nil == op.error) {
   NSString * newStr = [[NSString alloc] initWithData: op.derivedKeyData encoding:    NSUTF8StringEncoding]
   NSLog (@ "This is it:% @", newStr);
} Else {
    NSLog (@ "Error");
}

然而，当我运行此代码时，我得到一个null结果。我没有看到或可以犯错误？转换PBKDF2-HMAC-SHA1的正确解决方案是什么？

提前谢谢。

Answer 1

正确的解决方案是：

+ (NSData *)AESKeyForPassword:(NSString *)password 
                         salt:(NSData *)salt {
  NSMutableData *
  derivedKey = [NSMutableData dataWithLength:kAlgorithmKeySize];

  int 
  result = CCKeyDerivationPBKDF(kCCPBKDF2,            // algorithm
                                password.UTF8String,  // password
                                [password lengthOfBytesUsingEncoding:NSUTF8StringEncoding],  // passwordLength
                                salt.bytes,           // salt
                                salt.length,          // saltLen
                                kCCPRFHmacAlgSHA1,    // PRF
                                kPBKDFRounds,         // rounds
                                derivedKey.mutableBytes, // derivedKey
                                derivedKey.length); // derivedKeyLen

  // Do not log password here
  NSAssert(result == kCCSuccess,
           @"Unable to create AES key for password: %d", result);

  return derivedKey;
}

我在这篇文章中找到了这段代码： http://robnapier.net/aes-commoncrypto

使用方法PBKDF2WithHmacSHA1在Objective C或Apple Swift Code中加密

1 个答案: