java.security.spec

Class MGF1ParameterSpec

  • All Implemented Interfaces:
    AlgorithmParameterSpec 

    public class MGF1ParameterSpec
extends Object
implements AlgorithmParameterSpec
    This class specifies the set of parameters used with mask generation function MGF1 in OAEP Padding and RSA-PSS signature scheme, as defined in the PKCS #1 v2.1 standard.

    Its ASN.1 definition in PKCS#1 standard is described below: 

     MGF1Parameters ::= OAEP-PSSDigestAlgorthms
    where 
     OAEP-PSSDigestAlgorithms    ALGORITHM-IDENTIFIER ::= {
   { OID id-sha1 PARAMETERS NULL   }|
   { OID id-sha224 PARAMETERS NULL   }|
   { OID id-sha256 PARAMETERS NULL }|
   { OID id-sha384 PARAMETERS NULL }|
   { OID id-sha512 PARAMETERS NULL },
   ...  -- Allows for future expansion --
 }
    Since:
    1.5
    See Also:
    PSSParameterSpec, OAEPParameterSpec

    • Field Detail

      • SHA1

        public static final MGF1ParameterSpec SHA1
        The MGF1ParameterSpec which uses "SHA-1" message digest.

      • SHA224

        public static final MGF1ParameterSpec SHA224
        The MGF1ParameterSpec which uses "SHA-224" message digest.

      • SHA256

        public static final MGF1ParameterSpec SHA256
        The MGF1ParameterSpec which uses "SHA-256" message digest.

      • SHA384

        public static final MGF1ParameterSpec SHA384
        The MGF1ParameterSpec which uses "SHA-384" message digest.

      • SHA512

        public static final MGF1ParameterSpec SHA512
        The MGF1ParameterSpec which uses SHA-512 message digest.

    • Constructor Detail

      • MGF1ParameterSpec

        public MGF1ParameterSpec(String mdName)
        Constructs a parameter set for mask generation function MGF1 as defined in the PKCS #1 standard.
        Parameters:
        mdName - the algorithm name for the message digest used in this mask generation function MGF1.
        Throws:
        NullPointerException - if mdName is null.

    • Method Detail

      • getDigestAlgorithm

        public String getDigestAlgorithm()
        Returns the algorithm name of the message digest used by the mask generation function.
        Returns:
        the algorithm name of the message digest.