Module java.base
Package 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 RSASSA-PSS signature scheme, as defined in the PKCS#1 v2.2 standard.

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

     PKCS1MGFAlgorithms    ALGORITHM-IDENTIFIER ::= {
   { OID id-mgf1 PARAMETERS HashAlgorithm },
   ...  -- Allows for future expansion --
 }
    where 
     HashAlgorithm ::= AlgorithmIdentifier {
   {OAEP-PSSDigestAlgorithms}
 }

 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 }|
   { OID id-sha512-224 PARAMETERS NULL }|
   { OID id-sha512-256 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

      • SHA512_224

        public static final MGF1ParameterSpec SHA512_224
        The MGF1ParameterSpec which uses SHA-512/224 message digest

      • SHA512_256

        public static final MGF1ParameterSpec SHA512_256
        The MGF1ParameterSpec which uses SHA-512/256 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.