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package java.security;

import java.util.Set;


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. 
See Also:
Since:1.7
/**
 * This interface specifies constraints for cryptographic algorithms,
 * keys (key sizes), and other algorithm parameters.
 * <p>
 * {@code 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.
 * <p>
 * Note that {@code AlgorithmConstraints} can be used to represent the
 * restrictions described by the security properties
 * {@code jdk.certpath.disabledAlgorithms} and
 * {@code jdk.tls.disabledAlgorithms}, or could be used by a
 * concrete {@code PKIXCertPathChecker} to check whether a specified
 * certificate in the certification path contains the required algorithm
 * constraints.
 *
 * @see javax.net.ssl.SSLParameters#getAlgorithmConstraints
 * @see javax.net.ssl.SSLParameters#setAlgorithmConstraints(AlgorithmConstraints)
 *
 * @since 1.7
 */

public interface AlgorithmConstraints {

    
Determines whether an algorithm is granted permission for the
specified cryptographic primitives.

Params:
  • primitives – a set of cryptographic primitives
  • algorithm – the algorithm name
  • parameters – the algorithm parameters, or null if no additional
    parameters
Throws:
Returns:true if the algorithm is permitted and can be used for all
    of the specified cryptographic primitives
/**
     * Determines whether an algorithm is granted permission for the
     * specified cryptographic primitives.
     *
     * @param primitives a set of cryptographic primitives
     * @param algorithm the algorithm name
     * @param parameters the algorithm parameters, or null if no additional
     *     parameters
     *
     * @return true if the algorithm is permitted and can be used for all
     *     of the specified cryptographic primitives
     *
     * @throws IllegalArgumentException if primitives or algorithm is null
     *     or empty
     */
    public boolean permits(Set<CryptoPrimitive> primitives,
            String algorithm, AlgorithmParameters parameters);

    
Determines whether a key is granted permission for the specified
cryptographic primitives.


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

Params:
  • primitives – a set of cryptographic primitives
  • key – the key
Throws:
Returns:true if the key can be used for all of the specified
    cryptographic primitives
/**
     * Determines whether a key is granted permission for the specified
     * cryptographic primitives.
     * <p>
     * This method is usually used to check key size and key usage.
     *
     * @param primitives a set of cryptographic primitives
     * @param key the key
     *
     * @return true if the key can be used for all of the specified
     *     cryptographic primitives
     *
     * @throws IllegalArgumentException if primitives is null or empty,
     *     or the key is null
     */
    public boolean permits(Set<CryptoPrimitive> primitives, Key key);

    
Determines whether an algorithm and the corresponding key are granted
permission for the specified cryptographic primitives.

Params:
  • primitives – a set of cryptographic primitives
  • algorithm – the algorithm name
  • key – the key
  • parameters – the algorithm parameters, or null if no additional
    parameters
Throws:
Returns:true if the key and the algorithm can be used for all of the
    specified cryptographic primitives
/**
     * Determines whether an algorithm and the corresponding key are granted
     * permission for the specified cryptographic primitives.
     *
     * @param primitives a set of cryptographic primitives
     * @param algorithm the algorithm name
     * @param key the key
     * @param parameters the algorithm parameters, or null if no additional
     *     parameters
     *
     * @return true if the key and the algorithm can be used for all of the
     *     specified cryptographic primitives
     *
     * @throws IllegalArgumentException if primitives or algorithm is null
     *     or empty, or the key is null
     */
    public boolean permits(Set<CryptoPrimitive> primitives,
                String algorithm, Key key, AlgorithmParameters parameters);

}