程序包 java.security.spec

类 PSSParameterSpec

java.lang.Object

java.security.spec.PSSParameterSpec

所有已实现的接口:

AlgorithmParameterSpec

public class PSSParameterSpec
extends Object
implements AlgorithmParameterSpec

This class specifies a parameter spec for RSASSA-PSS signature scheme, as defined in the PKCS#1 v2.2 standard.

Its ASN.1 definition in PKCS#1 standard is described below:

 RSASSA-PSS-params ::= SEQUENCE {
   hashAlgorithm      [0] HashAlgorithm      DEFAULT sha1,
   maskGenAlgorithm   [1] MaskGenAlgorithm   DEFAULT mgf1SHA1,
   saltLength         [2] INTEGER            DEFAULT 20,
   trailerField       [3] TrailerField       DEFAULT trailerFieldBC(1)
 }
 

where

 HashAlgorithm ::= AlgorithmIdentifier {
   {OAEP-PSSDigestAlgorithms}
 }
 MaskGenAlgorithm ::= AlgorithmIdentifier { {PKCS1MGFAlgorithms} }
 TrailerField ::= INTEGER { trailerFieldBC(1) }

 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 --
 }
 

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

从以下版本开始:

1.4

另请参阅:

MGF1ParameterSpec, AlgorithmParameterSpec, Signature

字段概要

字段

限定符和类型	字段	说明
static PSSParameterSpec	DEFAULT	The PSS parameter set with all default values

构造器概要

构造器

构造器	说明
PSSParameterSpec(int saltLen)	Creates a new PSSParameterSpec using the specified salt length and other default values as defined in PKCS#1.
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.

方法概要

限定符和类型	方法	说明
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 bytes.
int	getTrailerField()	Returns the value for the trailer field.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料

DEFAULT

public static final PSSParameterSpec DEFAULT

The PSS parameter set with all default values

从以下版本开始:

1.5

构造器详细资料

PSSParameterSpec

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.

参数:

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

抛出:

NullPointerException - if mdName, or mgfName is null

IllegalArgumentException - if saltLen or trailerField is less than 0

从以下版本开始:

1.5

PSSParameterSpec

public PSSParameterSpec(int saltLen)

Creates a new PSSParameterSpec using the specified salt length and other default values as defined in PKCS#1.

参数:

saltLen - the length of salt in bytes to be used in PKCS#1 PSS encoding

抛出:

IllegalArgumentException - if saltLen is less than 0

方法详细资料

getDigestAlgorithm

public String getDigestAlgorithm()

Returns the message digest algorithm name.

返回:

the message digest algorithm name

从以下版本开始:

1.5

getMGFAlgorithm

public String getMGFAlgorithm()

Returns the mask generation function algorithm name.

返回:

the mask generation function algorithm name

从以下版本开始:

1.5

getMGFParameters

public AlgorithmParameterSpec getMGFParameters()

Returns the parameters for the mask generation function.

返回:

the parameters for the mask generation function

从以下版本开始:

1.5

getSaltLength

public int getSaltLength()

Returns the salt length in bytes.

返回:

the salt length

getTrailerField

public int getTrailerField()

Returns the value for the trailer field.

返回:

the value for the trailer field

从以下版本开始:

1.5