Digests (Derquinse Commons API)

java.lang.Object
- net.derquinse.common.base.NotInstantiable
- - net.derquinse.common.base.Digests

```
public final class Digests
extends NotInstantiable
```
Utility class for dealing with message digests.

Author:

Andres Rodriguez

Field Summary

Fields
Modifier and Type	Field and Description
`static String`	`MD5` Algorithm: MD5.
`static String`	`SHA1` Algorithm: SHA-1.
`static String`	`SHA256` Algorithm: SHA-256.
`static String`	`SHA512` Algorithm: SHA-512.

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`static ByteString`	`getDigest(byte[] data, MessageDigest md)` Computes and returns as a byte string the digest of the provided data.
`static ByteString`	`getDigest(ByteSource source, MessageDigest md)` Computes and returns as a byte string the digest of the provided data.
`static MessageDigest`	`getInstance(String algorithm)` Creates a new instance.
`static MessageDigest`	`md5()` Returns a Digest object that implements the MD5 algorithm.
`static ByteString`	`md5(byte[] data)` Computes and returns as a byte string the MD5 digest of the provided data.
`static ByteString`	`md5(ByteSource source)` Computes and returns as a byte string the MD5 digest of the provided data.
`static MessageDigest`	`sha1()` Returns a Digest object that implements the SHA-1 algorithm.
`static ByteString`	`sha1(byte[] data)` Computes and returns as a byte string the SHA-1 digest of the provided data.
`static ByteString`	`sha1(ByteSource source)` Computes and returns as a byte string the SHA-1 digest of the provided data.
`static MessageDigest`	`sha256()` Returns a Digest object that implements the SHA-256 algorithm.
`static ByteString`	`sha256(byte[] data)` Computes and returns as a byte string the SHA-256 digest of the provided data.
`static ByteString`	`sha256(ByteSource source)` Computes and returns as a byte string the SHA-256 digest of the provided data.
`static MessageDigest`	`sha512()` Returns a Digest object that implements the SHA-512 algorithm.
`static ByteString`	`sha512(byte[] data)` Computes and returns as a byte string the SHA-512 digest of the provided data.
`static ByteString`	`sha512(ByteSource source)` Computes and returns as a byte string the SHA-512 digest of the provided data.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - MD5
```
public static final String MD5
```
    Algorithm: MD5.
    
    See Also:
    
    Constant Field Values
  - SHA1
```
public static final String SHA1
```
    Algorithm: SHA-1.
    
    See Also:
    
    Constant Field Values
  - SHA256
```
public static final String SHA256
```
    Algorithm: SHA-256.
    
    See Also:
    
    Constant Field Values
  - SHA512
```
public static final String SHA512
```
    Algorithm: SHA-512.
    
    See Also:
    
    Constant Field Values
- Method Detail
  - getInstance
```
public static MessageDigest getInstance(String algorithm)
                                 throws NoSuchAlgorithmException
```
    Creates a new instance.
    
    Parameters:
    
    algorithm - Digest algorithm.
    
    Returns:
    
    A Digest object that implements the specified algorithm.
    
    Throws:
    
    NoSuchAlgorithmException - If the algorithm is not available in the caller's environment.
  - getDigest
```
public static ByteString getDigest(byte[] data,
                                   MessageDigest md)
```
    Computes and returns as a byte string the digest of the provided data.
  - getDigest
```
public static ByteString getDigest(ByteSource source,
                                   MessageDigest md)
                            throws IOException
```
    Computes and returns as a byte string the digest of the provided data.
    
    Throws:
    
    IOException
  - md5
```
public static MessageDigest md5()
```
    Returns a Digest object that implements the MD5 algorithm.
  - md5
```
public static ByteString md5(byte[] data)
```
    Computes and returns as a byte string the MD5 digest of the provided data.
  - md5
```
public static ByteString md5(ByteSource source)
                      throws IOException
```
    Computes and returns as a byte string the MD5 digest of the provided data.
    
    Throws:
    
    IOException
  - sha1
```
public static MessageDigest sha1()
```
    Returns a Digest object that implements the SHA-1 algorithm.
  - sha1
```
public static ByteString sha1(byte[] data)
```
    Computes and returns as a byte string the SHA-1 digest of the provided data.
  - sha1
```
public static ByteString sha1(ByteSource source)
                       throws IOException
```
    Computes and returns as a byte string the SHA-1 digest of the provided data.
    
    Throws:
    
    IOException
  - sha256
```
public static MessageDigest sha256()
```
    Returns a Digest object that implements the SHA-256 algorithm.
  - sha256
```
public static ByteString sha256(byte[] data)
```
    Computes and returns as a byte string the SHA-256 digest of the provided data.
  - sha256
```
public static ByteString sha256(ByteSource source)
                         throws IOException
```
    Computes and returns as a byte string the SHA-256 digest of the provided data.
    
    Throws:
    
    IOException
  - sha512
```
public static MessageDigest sha512()
```
    Returns a Digest object that implements the SHA-512 algorithm.
  - sha512
```
public static ByteString sha512(byte[] data)
```
    Computes and returns as a byte string the SHA-512 digest of the provided data.
  - sha512
```
public static ByteString sha512(ByteSource source)
                         throws IOException
```
    Computes and returns as a byte string the SHA-512 digest of the provided data.
    
    Throws:
    
    IOException

Class Digests

Field Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

MD5

SHA1

SHA256

SHA512

Method Detail

getInstance

getDigest

getDigest

md5

md5

md5

sha1

sha1

sha1

sha256

sha256

sha256

sha512

sha512

sha512