Module java.base

Class MGF1ParameterSpec

All Implemented Interfaces:

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:

   { OID id-mgf1 PARAMETERS HashAlgorithm },
   ...  -- Allows for future expansion --
 HashAlgorithm ::= AlgorithmIdentifier {

   { 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 --
See Also:
PSSParameterSpec, OAEPParameterSpec
  • Field Details

    • 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 Details

    • MGF1ParameterSpec

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

    • getDigestAlgorithm

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