compact1, compact2, compact3
javax.crypto.spec
Class OAEPParameterSpec
- 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:
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MGF1ParameterSpec,PSource
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Field Summary
Fields Modifier and Type Field and Description static OAEPParameterSpecDEFAULTThe OAEP parameter set with all default values.
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Constructor Summary
Constructors Constructor and 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 Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method and 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
DEFAULT
public static final OAEPParameterSpec DEFAULT
The OAEP parameter set with all default values.
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Constructor Detail
OAEPParameterSpec
public 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:
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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:
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NullPointerException- ifmdName,mgfName, orpSrcis null.
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Method Detail
getDigestAlgorithm
public String getDigestAlgorithm()
Returns the message digest algorithm name.- Returns:
- the message digest algorithm name.
getMGFAlgorithm
public String getMGFAlgorithm()
Returns the mask generation function algorithm name.- Returns:
- the mask generation function algorithm name.
getMGFParameters
public AlgorithmParameterSpec getMGFParameters()
Returns the parameters for the mask generation function.- Returns:
- the parameters for the mask generation function.
getPSource
public PSource getPSource()
Returns the source of encoding input P.- Returns:
- the source of encoding input P.
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