MacHashFunction

java.lang.Object
- com.google.common.hash.AbstractHashFunction
- - com.google.common.hash.MacHashFunction

All Implemented Interfaces:

HashFunction
```
final class MacHashFunction
extends AbstractHashFunction
```
HashFunction adapter for Mac instances.

Nested Class Summary

Nested Classes
Modifier and Type Class Description

private static class MacHashFunction.MacHasher
Hasher that updates a Mac (message authentication code).

Field Summary

Fields
Modifier and Type	Field	Description
`private int`	`bits`
`private java.security.Key`	`key`
`private javax.crypto.Mac`	`prototype`
`private boolean`	`supportsClone`
`private java.lang.String`	`toString`

Constructor Summary

Constructors
Constructor Description

MacHashFunction(java.lang.String algorithmName, java.security.Key key, java.lang.String toString)

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`int`	`bits()`	Returns the number of bits (a multiple of 32) that each hash code produced by this hash function has.
`private static javax.crypto.Mac`	`getMac(java.lang.String algorithmName, java.security.Key key)`
`Hasher`	`newHasher()`	Begins a new hash code computation by returning an initialized, stateful `Hasher` instance that is ready to receive data.
`private static boolean`	`supportsClone(javax.crypto.Mac mac)`
`java.lang.String`	`toString()`

Methods inherited from class com.google.common.hash.AbstractHashFunction
hashBytes, hashBytes, hashBytes, hashInt, hashLong, hashObject, hashString, hashUnencodedChars, newHasher

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

Field Detail

prototype

private final javax.crypto.Mac prototype

key
```
private final java.security.Key key
```

toString

private final java.lang.String toString

bits
```
private final int bits
```

supportsClone
```
private final boolean supportsClone
```

Constructor Detail

MacHashFunction

MacHashFunction(java.lang.String algorithmName,
                java.security.Key key,
                java.lang.String toString)

Method Detail

bits
```
public int bits()
```
Description copied from interface: HashFunction

Returns the number of bits (a multiple of 32) that each hash code produced by this hash function has.

supportsClone

private static boolean supportsClone(javax.crypto.Mac mac)

getMac

private static javax.crypto.Mac getMac(java.lang.String algorithmName,
                                       java.security.Key key)

newHasher
```
public Hasher newHasher()
```
Description copied from interface: HashFunction
Begins a new hash code computation by returning an initialized, stateful Hasher instance that is ready to receive data. Example:
```
 HashFunction hf = Hashing.md5();
 HashCode hc = hf.newHasher()
     .putLong(id)
     .putBoolean(isActive)
     .hash();
 
```

toString
```
public java.lang.String toString()
```
Overrides:

toString in class java.lang.Object