SecureShuffleUtils (Hadoop 1.2.2-SNAPSHOT API)

```
public class SecureShuffleUtils
extends Object
```
utilities for generating kyes, hashes and verifying them for shuffle

字段
限定符和类型	字段和说明
`static String`	`HTTP_HEADER_REPLY_URL_HASH`
`static String`	`HTTP_HEADER_URL_HASH`

构造器
构造器和说明
`SecureShuffleUtils()`

方法
限定符和类型	方法和说明
`static String`	`buildMsgFrom(javax.servlet.http.HttpServletRequest request)` Shuffle specific utils - build string for encoding from URL
`static String`	`buildMsgFrom(URL url)` Shuffle specific utils - build string for encoding from URL
`static String`	`generateHash(byte[] msg, SecretKey key)` Base64 encoded hash of msg
`static String`	`hashFromString(String enc_str, SecretKey key)` Aux util to calculate hash of a String
`static String`	`toHex(byte[] ba)` byte array to Hex String
`static void`	`verifyReply(String base64Hash, String msg, SecretKey key)` verify that base64Hash is same as HMacHash(msg)

public static String generateHash(byte[] msg,
                  SecretKey key)

Base64 encoded hash of msg

public static String hashFromString(String enc_str,
                    SecretKey key)
                             throws IOException

Aux util to calculate hash of a String

public static void verifyReply(String base64Hash,
               String msg,
               SecretKey key)
                        throws IOException

verify that base64Hash is same as HMacHash(msg)

类 SecureShuffleUtils