Mac Download For Java 7
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- Class
Class Mac
- javax.crypto.Mac
- All Implemented Interfaces:
- Cloneable
This class provides the functionality of a 'Message Authentication Code' (MAC) algorithm.A MAC provides a way to check the integrity of information transmitted over or stored in an unreliable medium, based on a secret key. Typically, message authentication codes are used between two parties that share a secret key in order to validate information transmitted between these parties.
A MAC mechanism that is based on cryptographic hash functions is referred to as HMAC. HMAC can be used with any cryptographic hash function, e.g., SHA256 or SHA384, in combination with a secret shared key. HMAC is specified in RFC 2104.
Every implementation of the Java platform is required to support the following standard
Macalgorithms:- HmacMD5
- HmacSHA1
- HmacSHA256
- Since:
- 1.4
Constructor Summary
Constructors Modifier Constructor and Description protectedMac(MacSpi macSpi, Provider provider, String algorithm)
Method Summary
Methods Modifier and Type Method and Description Objectclone()Returns a clone if the provider implementation is cloneable.byte[]doFinal()byte[]doFinal(byte[] input)Processes the given array of bytes and finishes the MAC operation.voiddoFinal(byte[] output, int outOffset)StringgetAlgorithm()Returns the algorithm name of thisMacobject.static MacgetInstance(String algorithm)Returns aMacobject that implements the specified MAC algorithm.static MacgetInstance(String algorithm, Provider provider)Returns aMacobject that implements the specified MAC algorithm.static MacgetInstance(String algorithm, String provider)Returns aMacobject that implements the specified MAC algorithm.intgetMacLength()ProvidergetProvider()Returns the provider of thisMacobject.voidinit(Key key)voidinit(Key key, AlgorithmParameterSpec params)Initializes thisMacobject with the given key and algorithm parameters.voidreset()voidupdate(byte input)Processes the given byte.voidupdate(byte[] input)voidupdate(byte[] input, int offset, int len)Processes the firstlenbytes ininput, starting atoffsetinclusive.voidupdate(ByteBuffer input)Processesinput.remaining()bytes in the ByteBufferinput, starting atinput.position().Methods inherited from class java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail
Mac
- Parameters:
macSpi- the delegateprovider- the provideralgorithm- the algorithm
Method Detail
getAlgorithm
Returns the algorithm name of thisMacobject.This is the same name that was specified in one of the
getInstancecalls that created thisMacobject.- Returns:
- the algorithm name of this
Macobject.
getInstance
Returns aMacobject that implements the specified MAC algorithm.This method traverses the list of registered security Providers, starting with the most preferred Provider. A new Mac object encapsulating the MacSpi implementation from the first Provider that supports the specified algorithm is returned.
Note that the list of registered providers may be retrieved via the
Security.getProviders()method.- Parameters:
algorithm- the standard name of the requested MAC algorithm. See the Mac section in the Java Cryptography Architecture Standard Algorithm Name Documentation for information about standard algorithm names.- Returns:
- the new
Macobject. - Throws:
NoSuchAlgorithmException- if no Provider supports a MacSpi implementation for the specified algorithm.- See Also:
Provider
getInstance
Returns aMacobject that implements the specified MAC algorithm.A new Mac object encapsulating the MacSpi implementation from the specified provider is returned. The specified provider must be registered in the security provider list.
Note that the list of registered providers may be retrieved via the
Security.getProviders()method.- Parameters:
algorithm- the standard name of the requested MAC algorithm. See the Mac section in the Java Cryptography Architecture Standard Algorithm Name Documentation for information about standard algorithm names.provider- the name of the provider.- Returns:
- the new
Macobject. - Throws:
NoSuchAlgorithmException- if a MacSpi implementation for the specified algorithm is not available from the specified provider.NoSuchProviderException- if the specified provider is not registered in the security provider list.IllegalArgumentException- if theprovideris null or empty.- See Also:
Provider
getInstance
Returns aMacobject that implements the specified MAC algorithm.A new Mac object encapsulating the MacSpi implementation from the specified Provider object is returned. Note that the specified Provider object does not have to be registered in the provider list.
- Parameters:
algorithm- the standard name of the requested MAC algorithm. See the Mac section in the Java Cryptography Architecture Standard Algorithm Name Documentation for information about standard algorithm names.provider- the provider.- Returns:
- the new
Macobject. - Throws:
NoSuchAlgorithmException- if a MacSpi implementation for the specified algorithm is not available from the specified Provider object.IllegalArgumentException- if theprovideris null.- See Also:
Provider
getProvider
- Returns:
- the provider of this
Macobject.
getMacLength
Returns the length of the MAC in bytes.- Returns:
- the MAC length in bytes.
init
- Parameters:
key- the key.- Throws:
InvalidKeyException- if the given key is inappropriate for initializing this MAC.
init
Initializes thisMacobject with the given key and algorithm parameters.- Parameters:
key- the key.params- the algorithm parameters.- Throws:
InvalidKeyException- if the given key is inappropriate for initializing this MAC.InvalidAlgorithmParameterException- if the given algorithm parameters are inappropriate for this MAC.
update
- Parameters:
input- the input byte to be processed.- Throws:
IllegalStateException- if thisMachas not been initialized.
update
Processes the given array of bytes.- Parameters:
input- the array of bytes to be processed.- Throws:
IllegalStateException- if thisMachas not been initialized.
update
Processes the firstlenbytes ininput, starting atoffsetinclusive.- Parameters:
input- the input buffer.offset- the offset ininputwhere the input starts.len- the number of bytes to process.- Throws:
IllegalStateException- if thisMachas not been initialized.
update
Processesinput.remaining()bytes in the ByteBufferinput, starting atinput.position(). Upon return, the buffer's position will be equal to its limit; its limit will not have changed.- Parameters:
input- the ByteBuffer- Throws:
IllegalStateException- if thisMachas not been initialized.- Since:
- 1.5
doFinal
Finishes the MAC operation.A call to this method resets this
Macobject to the state it was in when previously initialized via a call toinit(Key)orinit(Key, AlgorithmParameterSpec). That is, the object is reset and available to generate another MAC from the same key, if desired, via new calls toupdateanddoFinal. (In order to reuse thisMacobject with a different key, it must be reinitialized via a call toinit(Key)orinit(Key, AlgorithmParameterSpec).- Returns:
- the MAC result.
- Throws:
IllegalStateException- if thisMachas not been initialized.
doFinal
Finishes the MAC operation.A call to this method resets this
Macobject to the state it was in when previously initialized via a call toinit(Key)orinit(Key, AlgorithmParameterSpec). That is, the object is reset and available to generate another MAC from the same key, if desired, via new calls toupdateanddoFinal. (In order to reuse thisMacobject with a different key, it must be reinitialized via a call toinit(Key)orinit(Key, AlgorithmParameterSpec).The MAC result is stored in
output, starting atoutOffsetinclusive.- Parameters:
output- the buffer where the MAC result is storedoutOffset- the offset inoutputwhere the MAC is stored- Throws:
ShortBufferException- if the given output buffer is too small to hold the resultIllegalStateException- if thisMachas not been initialized.
doFinal
Processes the given array of bytes and finishes the MAC operation.A call to this method resets this
Macobject to the state it was in when previously initialized via a call toinit(Key)orinit(Key, AlgorithmParameterSpec). That is, the object is reset and available to generate another MAC from the same key, if desired, via new calls toupdateanddoFinal. (In order to reuse thisMacobject with a different key, it must be reinitialized via a call toinit(Key)orinit(Key, AlgorithmParameterSpec).- Parameters:
input- data in bytes- Returns:
- the MAC result.
- Throws:
IllegalStateException- if thisMachas not been initialized.
reset
Resets thisMacobject.A call to this method resets this
Macobject to the state it was in when previously initialized via a call toinit(Key)orinit(Key, AlgorithmParameterSpec). That is, the object is reset and available to generate another MAC from the same key, if desired, via new calls toupdateanddoFinal. (In order to reuse thisMacobject with a different key, it must be reinitialized via a call toinit(Key)orinit(Key, AlgorithmParameterSpec).
clone
Returns a clone if the provider implementation is cloneable.- Overrides:
clonein classObject- Returns:
- a clone if the provider implementation is cloneable.
- Throws:
CloneNotSupportedException- if this is called on a delegate that does not supportCloneable.- See Also:
Cloneable
- Class
- Summary:
- Nested |
- Field |
- Constr |
- Detail:
- Field |
- Constr |
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Newest post on how to install Oracle JDK 8 / Java SE 8 on Mac OS X 10.10 Yosemite can be found here.
At the time of this writing, there is no official release of Java SE 7 / Oracle JDK 1.7 on Mac OS X. It is still in developer preview based on Apple’s contributions to OpenJDK. The Developer Preview is provided to the community so that the developers can get feedback on the ongoing progress of the project. The developer preview should work on any Intel-based Mac and has been tested on Mac OS X 10.6.8 (Snow Leopard) and 10.7 (Lion).
UPDATE
Oracle has launched the official Java SE 7 for Mac OS X 64-bit platform. You can download it from here.
Mac Download For Java 7 32-bit
This tutorial shows you how to install Java SE 7 Developer Preview on Mac OS X 10.7.2 Lion running on my MacBook Pro.
Mac Download For Java 7 Jdk
1. Download the Oracle JDK7 Mac OS X port dmg file from here. At the time of this writing, the version of the JDK7 is Oracle JDK7 build b223 released on December 23, 2011. The dmg file name is jdk-7-ea-macosx-b223.dmg
2. Create a JavaVirtualMachines folder under /Library/Java if it doesn’t exist.
In my case, the JavaVirtualMachines is already there so I don’t need to create it manually.
3. Open the jdk-7-ea-macosx-b223.dmg file by double-clicking on it. Then drag the JDK 1.7.0 Developer Preview icon in the left side to the JavaVirtualMachines icon folder in the right side.
4. Go to /Library/Java/JavaVirtualMachines directory using Finder application. Then double-click the ‘JDK 1.7.0 Developer Preview’ icon. This will open the Java Preferences window. Here you can change the preferred order of the installed Java platforms by dragging it up or down. Make sure the Java SE 7 is in the preferred order or you can simply deselect the Java SE 6 version.

5. Now issue the ‘java -version’ command in the terminal window to verify.
6. Done
