- java.lang.Object
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- javax.crypto.spec.OAEPParameterSpec
 
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- All Implemented Interfaces:
- AlgorithmParameterSpec
 
 public class OAEPParameterSpec extends Object implements 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 }whereHashAlgorithm ::= 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))Note: the OAEPParameterSpec.DEFAULT uses the following: message digest -- "SHA-1" mask generation function (mgf) -- "MGF1" parameters for mgf -- MGF1ParameterSpec.SHA1 source of encoding input -- PSource.PSpecified.DEFAULT- Since:
- 1.5
- See Also:
- MGF1ParameterSpec,- PSource
 
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Field SummaryFields Modifier and Type Field Description static OAEPParameterSpecDEFAULTThe OAEP parameter set with all default values.
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Constructor SummaryConstructors Constructor Description 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.
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Method SummaryAll Methods Instance Methods Concrete Methods Modifier and Type Method Description StringgetDigestAlgorithm()Returns the message digest algorithm name.StringgetMGFAlgorithm()Returns the mask generation function algorithm name.AlgorithmParameterSpecgetMGFParameters()Returns the parameters for the mask generation function.PSourcegetPSource()Returns the source of encoding input P.
 
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Field Detail- 
DEFAULTpublic static final OAEPParameterSpec DEFAULT The OAEP parameter set with all default values.
 
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Constructor Detail- 
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 null is specified, null will 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 Detail- 
getDigestAlgorithmpublic String getDigestAlgorithm() Returns the message digest algorithm name.- Returns:
- the message digest algorithm name.
 
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getMGFAlgorithmpublic String getMGFAlgorithm() Returns the mask generation function algorithm name.- Returns:
- the mask generation function algorithm name.
 
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getMGFParameterspublic AlgorithmParameterSpec getMGFParameters() Returns the parameters for the mask generation function.- Returns:
- the parameters for the mask generation function.
 
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getPSourcepublic PSource getPSource() Returns the source of encoding input P.- Returns:
- the source of encoding input P.
 
 
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