org.openslx.imagemaster.util.Hash Class Reference

Collaboration diagram for org.openslx.imagemaster.util.Hash:

Static Public Member Functions
static String	md5 (final byte[] bytes)
	Compute md5 hash of given binary data. More...
static String	md5 (final String text)
	Compute md5 hash of the given string. More...
static String	sha256 (final byte[] bytes)
	Compute sha256 hash of given binary data. More...
static String	sha256 (final String text)
	Compute sha256 hash of the given string. More...

Static Private Member Functions
static String	toHexString (final byte[] bytes)
	Convert given binary data to hex. More...

Static Private Attributes
static final ThreadLocal < MessageDigest >	md5hash
	Cache of md5 digesters. More...
static final ThreadLocal < MessageDigest >	sha256hash
	Cache of sha256 digesters. More...
static final char[]	HEX_CHARS = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' }
	For converting to hex string. More...
static final Charset	UTF8 = Charset.forName( "UTF-8" )
	Constant for the utf-8 charset, saves repeated lookups. More...

Detailed Description

Definition at line 7 of file Hash.java.

Member Function Documentation

static String org.openslx.imagemaster.util.Hash.md5 ( final byte[]  bytes )

static

Compute md5 hash of given binary data.

Parameters

bytes

the binary data in a byte array

Returns

hex representation of the 128bit md5 hash

Definition at line 60 of file Hash.java.

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static String org.openslx.imagemaster.util.Hash.md5 ( final String  text )

static

Compute md5 hash of the given string.

The string will be converted to utf-8 before computation.

Parameters

text	the text to hash

Returns

hex representation of the 128bit md5 hash

Definition at line 72 of file Hash.java.

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static String org.openslx.imagemaster.util.Hash.sha256 ( final byte[]  bytes )

static

Compute sha256 hash of given binary data.

Parameters

bytes

the binary data in a byte array

Returns

hex representation of the 256bit sha256 hash

Definition at line 85 of file Hash.java.

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static String org.openslx.imagemaster.util.Hash.sha256 ( final String  text )

static

Compute sha256 hash of the given string.

The string will be converted to utf-8 before computation.

Parameters

text	the text to hash

Returns

hex representation of the 256bit sha256 hash

Definition at line 97 of file Hash.java.

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static String org.openslx.imagemaster.util.Hash.toHexString ( final byte[]  bytes )

staticprivate

Convert given binary data to hex.

Parameters

bytes

binary data in a byte array

Returns

upper case hex representation of bytes

Definition at line 110 of file Hash.java.

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Member Data Documentation

final char [] org.openslx.imagemaster.util.Hash.HEX_CHARS = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' }

staticprivate

For converting to hex string.

Definition at line 46 of file Hash.java.

final ThreadLocal<MessageDigest> org.openslx.imagemaster.util.Hash.md5hash

staticprivate

Initial value:

= new ThreadLocal<MessageDigest>() {

      @Override
      public MessageDigest initialValue()
      {
         try {
            return MessageDigest.getInstance( "MD5" );
         } catch ( NoSuchAlgorithmException e ) {
            e.printStackTrace();
            System.exit( 1 );
            return null;
         }
      }
   }

Cache of md5 digesters.

Definition at line 12 of file Hash.java.

final ThreadLocal<MessageDigest> org.openslx.imagemaster.util.Hash.sha256hash

staticprivate

Initial value:

= new ThreadLocal<MessageDigest>() {

      @Override
      public MessageDigest initialValue()
      {
         try {
            return MessageDigest.getInstance( "SHA-256" );
         } catch ( NoSuchAlgorithmException e ) {
            e.printStackTrace();
            System.exit( 1 );
            return null;
         }
      }
   }

Cache of sha256 digesters.

Definition at line 29 of file Hash.java.

final Charset org.openslx.imagemaster.util.Hash.UTF8 = Charset.forName( "UTF-8" )

staticprivate

Constant for the utf-8 charset, saves repeated lookups.

Definition at line 50 of file Hash.java.

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The documentation for this class was generated from the following file:

• org/openslx/imagemaster/util/Hash.java