MessageDigest.getInstance

Class Overview | Class Members | This Package | All Packages

Syntax 1

public static MessageDigest getInstance( String algorithm ) throws NoSuchAlgorithmException

Parameters

algorithm: the name of the algorithm requested. See Appendix A in the Java Cryptography Architecture API Specification & Reference for information about standard algorithm names.

Returns

a Message Digest object implementing the specified algorithm.

Description

Generates a MessageDigest object that implements the specified digest algorithm. If the default provider package contains a MessageDigest subclass implementing the algorithm, an instance of that subclass is returned. If the algorithm is not available in the default package, other packages are searched.

Exceptions

NoSuchAlgorithmException if the algorithm is not available in the caller's environment.

Syntax 2

public static MessageDigest getInstance( String algorithm, String provider ) throws NoSuchAlgorithmException, NoSuchProviderException

Parameters

algorithm: the name of the algorithm requested. See Appendix A in the Java Cryptography Architecture API Specification & Reference for information about standard algorithm names.
provider: the name of the provider.

Returns

a Message Digest object implementing the specified algorithm.

Description

Generates a MessageDigest object implementing the specified algorithm, as supplied from the specified provider, if such an algorithm is available from the provider.

Exceptions

NoSuchAlgorithmException if the algorithm is not available in the package supplied by the requested provider.

Exceptions

NoSuchProviderException if the provider is not available in the environment.