Class OAEPParameterSpec
java.lang.Object
javax.crypto.spec.OAEPParameterSpec
- All Implemented Interfaces:
- AlgorithmParameterSpec
This class specifies the set of parameters used with OAEP Padding,
 as defined in the
 PKCS#1 v2.2 standard.
 Its ASN.1 definition in PKCS#1 standard is described below:
 
 RSAES-OAEP-params ::= SEQUENCE {
   hashAlgorithm      [0] HashAlgorithm     DEFAULT sha1,
   maskGenAlgorithm   [1] MaskGenAlgorithm  DEFAULT mgf1SHA1,
   pSourceAlgorithm   [2] PSourceAlgorithm  DEFAULT pSpecifiedEmpty
 }
 
 where
 
 HashAlgorithm ::= AlgorithmIdentifier {
   {OAEP-PSSDigestAlgorithms}
 }
 MaskGenAlgorithm ::= AlgorithmIdentifier { {PKCS1MGFAlgorithms} }
 PSourceAlgorithm ::= AlgorithmIdentifier {
   {PKCS1PSourceAlgorithms}
 }
 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 --
 }
 PKCS1MGFAlgorithms    ALGORITHM-IDENTIFIER ::= {
   { OID id-mgf1 PARAMETERS HashAlgorithm },
   ...  -- Allows for future expansion --
 }
 PKCS1PSourceAlgorithms    ALGORITHM-IDENTIFIER ::= {
   { OID id-pSpecified PARAMETERS EncodingParameters },
   ...  -- Allows for future expansion --
 }
 EncodingParameters ::= OCTET STRING(SIZE(0..MAX))
 - Since:
- 1.5
- External Specifications
- See Also:
- 
Field SummaryFieldsModifier and TypeFieldDescriptionstatic final OAEPParameterSpecDeprecated.This field uses the default values defined in the PKCS #1 standard.
- 
Constructor SummaryConstructorsConstructorDescriptionOAEPParameterSpec(String mdName, String mgfName, AlgorithmParameterSpec mgfSpec, PSource pSrc) Constructs a parameter set for OAEP padding as defined in the PKCS #1 standard using the specified message digest algorithmmdName, mask generation function algorithmmgfName, parameters for the mask generation functionmgfSpec, and source of the encoding input PpSrc.
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Method SummaryModifier and TypeMethodDescriptionReturns the message digest algorithm name.Returns the mask generation function algorithm name.Returns the parameters for the mask generation function.Returns the source of encoding input P.
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Field Details- 
DEFAULTDeprecated.This field uses the default values defined in the PKCS #1 standard. Some of these defaults are no longer recommended due to advances in cryptanalysis -- see Appendix B.1 of PKCS #1 for more details. Thus, it is recommended to create a newOAEPParameterSpecwith the desired parameter values using theOAEPParameterSpec(String, String, AlgorithmParameterSpec, PSource)constructor.The OAEP parameter set with all default values, i.e. "SHA-1" as message digest algorithm, "MGF1" as mask generation function (mgf) algorithm,MGF1ParameterSpec.SHA1as parameters for the mask generation function, andPSource.PSpecified.DEFAULTas the source of the encoding input.
 
- 
- 
Constructor Details- 
OAEPParameterSpecpublic OAEPParameterSpec(String mdName, String mgfName, AlgorithmParameterSpec mgfSpec, PSource pSrc) Constructs a parameter set for OAEP padding as defined in the PKCS #1 standard using the specified message digest algorithmmdName, mask generation function algorithmmgfName, parameters for the mask generation functionmgfSpec, and source of the encoding input PpSrc.- Parameters:
- mdName- the algorithm name for the message digest
- mgfName- the algorithm name for the mask generation function
- mgfSpec- the parameters for the mask generation function; if- nullis specified,- nullwill be returned by- getMGFParameters()
- pSrc- the source of the encoding input P
- Throws:
- NullPointerException- if- mdName,- mgfName, or- pSrcis- null
 
 
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- 
Method Details- 
getDigestAlgorithmReturns the message digest algorithm name.- Returns:
- the message digest algorithm name.
 
- 
getMGFAlgorithmReturns the mask generation function algorithm name.- Returns:
- the mask generation function algorithm name.
 
- 
getMGFParametersReturns the parameters for the mask generation function.- Returns:
- the parameters for the mask generation function.
 
- 
getPSourceReturns the source of encoding input P.- Returns:
- the source of encoding input P.
 
 
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