Module java.base
Package java.security.spec

Class MGF1ParameterSpec

java.lang.Object
java.security.spec.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:

  • Field Details

    • SHA1

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

    • SHA224

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

    • SHA256

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

    • SHA384

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

    • SHA512

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

    • SHA512_224

      public static final MGF1ParameterSpec SHA512_224
      The MGF1ParameterSpec uses a "SHA-512/224" message digest.
      Since:
      11

    • SHA512_256

      public static final MGF1ParameterSpec SHA512_256
      The MGF1ParameterSpec uses a "SHA-512/256" message digest.
      Since:
      11

    • SHA3_224

      public static final MGF1ParameterSpec SHA3_224
      The MGF1ParameterSpec uses a "SHA3-224" message digest.
      Since:
      16

    • SHA3_256

      public static final MGF1ParameterSpec SHA3_256
      The MGF1ParameterSpec uses a "SHA3-256" message digest.
      Since:
      16

    • SHA3_384

      public static final MGF1ParameterSpec SHA3_384
      The MGF1ParameterSpec uses a "SHA3-384" message digest.
      Since:
      16

    • SHA3_512

      public static final MGF1ParameterSpec SHA3_512
      The MGF1ParameterSpec uses a "SHA3-512" message digest.
      Since:
      16

  • Constructor Details

    • 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 Details

    • 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.