Interface AlgorithmConstraints

public interface AlgorithmConstraints
This interface specifies constraints for cryptographic algorithms, keys (key sizes), and other algorithm parameters.

AlgorithmConstraints objects are immutable. An implementation of this interface should not provide methods that can change the state of an instance once it has been created.

Note that AlgorithmConstraints can be used to represent the restrictions described by the security properties jdk.certpath.disabledAlgorithms and jdk.tls.disabledAlgorithms, or could be used by a concrete PKIXCertPathChecker to check whether a specified certificate in the certification path contains the required algorithm constraints.

Since:
1.7
See Also:

  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    permits(Set<CryptoPrimitive> primitives, String algorithm, AlgorithmParameters parameters)
    Determines whether an algorithm is granted permission for the specified cryptographic primitives.
    boolean
    permits(Set<CryptoPrimitive> primitives, String algorithm, Key key, AlgorithmParameters parameters)
    Determines whether an algorithm and the corresponding key are granted permission for the specified cryptographic primitives.
    boolean
    permits(Set<CryptoPrimitive> primitives, Key key)
    Determines whether a key is granted permission for the specified cryptographic primitives.

  • Method Details

    • permits

      boolean permits(Set<CryptoPrimitive> primitives, String algorithm, AlgorithmParameters parameters)
      Determines whether an algorithm is granted permission for the specified cryptographic primitives.
      Parameters:
      primitives - a set of cryptographic primitives
      algorithm - the algorithm name
      parameters - the algorithm parameters, or null if no additional parameters
      Returns:
      true if the algorithm is permitted and can be used for all the specified cryptographic primitives
      Throws:
      IllegalArgumentException - if primitives or algorithm is null or empty

    • permits

      boolean permits(Set<CryptoPrimitive> primitives, Key key)
      Determines whether a key is granted permission for the specified cryptographic primitives.

      This method is usually used to check key size and key usage.

      Parameters:
      primitives - a set of cryptographic primitives
      key - the key
      Returns:
      true if the key can be used for all the specified cryptographic primitives
      Throws:
      IllegalArgumentException - if primitives is null or empty, or the key is null

    • permits

      boolean permits(Set<CryptoPrimitive> primitives, String algorithm, Key key, AlgorithmParameters parameters)
      Determines whether an algorithm and the corresponding key are granted permission for the specified cryptographic primitives.
      Parameters:
      primitives - a set of cryptographic primitives
      algorithm - the algorithm name
      key - the key
      parameters - the algorithm parameters, or null if no additional parameters
      Returns:
      true if the key and the algorithm can be used for all the specified cryptographic primitives
      Throws:
      IllegalArgumentException - if primitives or algorithm is null or empty, or the key is null