This class specifies the set of parameters used with OAEP Padding, as defined in the PKCS #1 standard. Its ASN.1 definition in PKCS#1 standard is described below:
RSAES-OAEP-params ::= SEQUENCE { hashAlgorithm [0] OAEP-PSSDigestAlgorithms DEFAULT sha1, maskGenAlgorithm [1] PKCS1MGFAlgorithms DEFAULT mgf1SHA1, pSourceAlgorithm [2] PKCS1PSourceAlgorithms DEFAULT pSpecifiedEmpty }where
OAEP-PSSDigestAlgorithms ALGORITHM-IDENTIFIER ::= { { OID id-sha1 PARAMETERS NULL }| { OID id-sha256 PARAMETERS NULL }| { OID id-sha384 PARAMETERS NULL }| { OID id-sha512 PARAMETERS NULL }, ... -- Allows for future expansion -- } PKCS1MGFAlgorithms ALGORITHM-IDENTIFIER ::= { { OID id-mgf1 PARAMETERS OAEP-PSSDigestAlgorithms }, ... -- Allows for future expansion -- } PKCS1PSourceAlgorithms ALGORITHM-IDENTIFIER ::= { { OID id-pSpecified PARAMETERS OCTET STRING }, ... -- Allows for future expansion -- }
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
See Also
Field Summary
public static final OAEPParameterSpec | DEFAULT | The OAEP parameter set with all default values. |
Public Constructor Summary
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
algorithm
mdName , mask generation function
algorithm mgfName , parameters for the mask
generation function mgfSpec , and source of
the encoding input P pSrc . |
Public Method Summary
String |
getDigestAlgorithm()
Returns the message digest algorithm name.
|
String |
getMGFAlgorithm()
Returns the mask generation function algorithm name.
|
AlgorithmParameterSpec |
getMGFParameters()
Returns the parameters for the mask generation function.
|
PSource |
getPSource()
Returns the source of encoding input P.
|
Inherited Method Summary
Fields
public static final OAEPParameterSpec DEFAULT
The OAEP parameter set with all default values.
Public Constructors
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
algorithm mdName
, mask generation function
algorithm mgfName
, parameters for the mask
generation function mgfSpec
, and source of
the encoding input P pSrc
.
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 pSrc is null.
|
---|
Public Methods
public String getDigestAlgorithm ()
Returns the message digest algorithm name.
Returns
- the message digest algorithm name.
public String getMGFAlgorithm ()
Returns the mask generation function algorithm name.
Returns
- the mask generation function algorithm name.
public AlgorithmParameterSpec getMGFParameters ()
Returns the parameters for the mask generation function.
Returns
- the parameters for the mask generation function.
public PSource getPSource ()
Returns the source of encoding input P.
Returns
- the source of encoding input P.