- 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 -- }
whereHashAlgorithm ::= 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 Summary
Fields Modifier and Type Field Description static MGF1ParameterSpec
SHA1
The MGF1ParameterSpec which uses "SHA-1" message digeststatic MGF1ParameterSpec
SHA224
The MGF1ParameterSpec which uses "SHA-224" message digeststatic MGF1ParameterSpec
SHA256
The MGF1ParameterSpec which uses "SHA-256" message digeststatic MGF1ParameterSpec
SHA384
The MGF1ParameterSpec which uses "SHA-384" message digeststatic MGF1ParameterSpec
SHA512
The MGF1ParameterSpec which uses SHA-512 message digeststatic MGF1ParameterSpec
SHA512_224
The MGF1ParameterSpec which uses SHA-512/224 message digeststatic MGF1ParameterSpec
SHA512_256
The MGF1ParameterSpec which uses SHA-512/256 message digest
Constructor Summary
Constructors Constructor Description MGF1ParameterSpec(String mdName)
Constructs a parameter set for mask generation function MGF1 as defined in the PKCS #1 standard.
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description String
getDigestAlgorithm()
Returns the algorithm name of the message digest used by the mask generation function.
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
- ifmdName
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.