| java.lang.Object
 java.security.spec.PSSParameterSpec
| PSSParameterSpec | | public class PSSParameterSpec implements AlgorithmParameterSpec(Code) | | This class specifies a parameter spec for RSA-PSS signature scheme,
as defined in the
PKCS#1 v2.1
standard.
Its ASN.1 definition in PKCS#1 standard is described below:
RSASSA-PSS-params ::= SEQUENCE {
hashAlgorithm [0] OAEP-PSSDigestAlgorithms DEFAULT sha1,
maskGenAlgorithm [1] PKCS1MGFAlgorithms DEFAULT mgf1SHA1,
saltLength [2] INTEGER DEFAULT 20,
trailerField [3] INTEGER DEFAULT 1
}
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 --
}
Note: the PSSParameterSpec.DEFAULT uses the following:
message digest -- "SHA-1"
mask generation function (mgf) -- "MGF1"
parameters for mgf -- MGF1ParameterSpec.SHA1
SaltLength -- 20
TrailerField -- 1
See Also: MGF1ParameterSpec
See Also: AlgorithmParameterSpec
See Also: java.security.Signature
author:
Valerie Peng
version:
1.15 07/05/05
since:
1.4 |
| Constructor Summary | |
| public | PSSParameterSpec(String mdName, String mgfName, AlgorithmParameterSpec mgfSpec, int saltLen, int trailerField)
Creates a new PSSParameterSpec as defined in
the PKCS #1 standard using the specified message digest,
mask generation function, parameters for mask generation
function, salt length, and trailer field values.
Parameters:
mdName - the algorithm name of the hash function.
Parameters:
mgfName - the algorithm name of the mask generation function.
Parameters:
mgfSpec - the parameters for the mask generation function. | | public | PSSParameterSpec(int saltLen)
Creates a new PSSParameterSpec
using the specified salt length and other default values as
defined in PKCS#1. |
| DEFAULT | | final public static PSSParameterSpec DEFAULT(Code) | | The PSS parameter set with all default values.
since:
1.5 |
| PSSParameterSpec | | public PSSParameterSpec(String mdName, String mgfName, AlgorithmParameterSpec mgfSpec, int saltLen, int trailerField)(Code) | | Creates a new PSSParameterSpec as defined in
the PKCS #1 standard using the specified message digest,
mask generation function, parameters for mask generation
function, salt length, and trailer field values.
Parameters:
mdName - the algorithm name of the hash function.
Parameters:
mgfName - the algorithm name of the mask generation function.
Parameters:
mgfSpec - the parameters for the mask generation function. If null is specified, null will be returned by getMGFParameters().
Parameters:
saltLen - the length of salt.
Parameters:
trailerField - the value of the trailer field.
exception:
NullPointerException - if mdName, or mgfName is null.
exception:
IllegalArgumentException - if saltLenor trailerField is less than 0.
since:
1.5 |
| PSSParameterSpec | | public PSSParameterSpec(int saltLen)(Code) | | Creates a new PSSParameterSpec
using the specified salt length and other default values as
defined in PKCS#1.
Parameters:
saltLen - the length of salt in bits to be used in PKCS#1 PSS encoding.
exception:
IllegalArgumentException - if saltLen isless than 0. |
| getDigestAlgorithm | | public String getDigestAlgorithm()(Code) | | Returns the message digest algorithm name.
the message digest algorithm name.
since:
1.5 |
| getMGFAlgorithm | | public String getMGFAlgorithm()(Code) | | Returns the mask generation function algorithm name.
the mask generation function algorithm name.
since:
1.5 |
| getMGFParameters | | public AlgorithmParameterSpec getMGFParameters()(Code) | | Returns the parameters for the mask generation function.
the parameters for the mask generation function.
since:
1.5 |
| getSaltLength | | public int getSaltLength()(Code) | | Returns the salt length in bits.
the salt length. |
| getTrailerField | | public int getTrailerField()(Code) | | Returns the value for the trailer field, i.e. bc in PKCS#1 v2.1.
the value for the trailer field, i.e. bc in PKCS#1 v2.1.
since:
1.5 |
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