Class OAEPParameterSpec
- java.lang.Object
-
- javax.crypto.spec.OAEPParameterSpec
- 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 }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))
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
Field Summary
Modifier and Type | Field | Description |
---|---|---|
static OAEPParameterSpec | DEFAULT | The OAEP parameter set with all default values. |
Constructor Summary
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 algorithm |
Method Summary
Modifier and Type | Method | Description |
---|---|---|
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. |
Methods declared in class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Field Detail
DEFAULT
public static final OAEPParameterSpec DEFAULT
The OAEP parameter set with all default values.
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 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
- ifmdName
,mgfName
, orpSrc
is null.
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.