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Java™ Platform Standard Ed. 6 |
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java.lang.Object java.security.spec.PSSParameterSpec
public class PSSParameterSpec
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
MGF1ParameterSpec
,
AlgorithmParameterSpec
,
Signature
Field Summary | |
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static PSSParameterSpec |
DEFAULT
The PSS parameter set with all default values. |
Constructor Summary | |
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PSSParameterSpec(int saltLen)
Creates a new PSSParameterSpec
using the specified salt length and other default values as
defined in PKCS#1. |
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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. |
Method Summary | |
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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. |
int |
getSaltLength()
Returns the salt length in bits. |
int |
getTrailerField()
Returns the value for the trailer field, i.e. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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public static final PSSParameterSpec DEFAULT
Constructor Detail |
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public PSSParameterSpec(String mdName, String mgfName, AlgorithmParameterSpec mgfSpec, int saltLen, int trailerField)
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.
mdName
- the algorithm name of the hash function.mgfName
- the algorithm name of the mask generation
function.mgfSpec
- the parameters for the mask generation
function. If null is specified, null will be returned by
getMGFParameters().saltLen
- the length of salt.trailerField
- the value of the trailer field.
NullPointerException
- if mdName
,
or mgfName
is null.
IllegalArgumentException
- if saltLen
or trailerField
is less than 0.public PSSParameterSpec(int saltLen)
PSSParameterSpec
using the specified salt length and other default values as
defined in PKCS#1.
saltLen
- the length of salt in bits to be used in PKCS#1
PSS encoding.
IllegalArgumentException
- if saltLen
is
less than 0.Method Detail |
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public String getDigestAlgorithm()
public String getMGFAlgorithm()
public AlgorithmParameterSpec getMGFParameters()
public int getSaltLength()
public int getTrailerField()
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Java™ Platform Standard Ed. 6 |
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