com.adobe.testing.s3mock.util

Class HashUtil

java.lang.Object

com.adobe.testing.s3mock.util.HashUtil

public class HashUtil
extends Object

A util-Class for the creation of Hashes.

Constructor Summary

Constructors

Constructor and Description
HashUtil()

Method Summary

Modifier and Type	Method and Description
static String	getDigest(InputStream inputStream) Calculates a base64 MD5 Hash for the content of an inputStream.
static String	getDigest(String salt, InputStream inputStream) Calculates a base64 MD5 Hash for the content of an inputStream.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

HashUtil

public HashUtil()

Method Detail

getDigest

public static String getDigest(InputStream inputStream)
                        throws NoSuchAlgorithmException,
                               IOException

Calculates a base64 MD5 Hash for the content of an inputStream.

Mainly used for comparison of files. E.g. After PUTting a File to the Server, the Amazon S3-Client expects a base64 MD5 Hash, ETag, as part of the response Header to verify the validity of the transferred file.

Parameters:

inputStream - the InputStream.

Returns:

String Base64 MD5 Hash.

Throws:

NoSuchAlgorithmException - if no md5 can be found

IOException - if InputStream can't be read

getDigest

public static String getDigest(String salt,
                               InputStream inputStream)
                        throws NoSuchAlgorithmException,
                               IOException

Calculates a base64 MD5 Hash for the content of an inputStream.

Mainly used for comparison of files. E.g. After PUTting a File to the Server, the Amazon S3-Client expects a base64 MD5 Hash, ETag, as part of the response Header to verify the validity of the transferred file. For encrypted uploads, the returned hash may not be the same as the local client hash value.

Parameters:

salt - Optional salt to add to be digested, for simulating encryption dependent hashing.

inputStream - the InputStream.

Returns:

String Base64 MD5 Hash.

Throws:

NoSuchAlgorithmException - if no md5 can be found.

IOException - if InputStream can't be read.