Spec-Zone .ru
спецификации, руководства, описания, API
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public class PSSParameterSpec extends Object implements AlgorithmParameterSpec
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-sha224 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
Modifier and Type | Field and Description |
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static PSSParameterSpec |
DEFAULT
The PSS parameter set with all default values.
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Constructor and Description |
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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. |
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. |
Modifier and Type | Method and Description |
---|---|
String |
getDigestAlgorithm()
Returns the message digest algorithm name.
|
String |
getMGFAlgorithm()
Returns the mask generation function algorithm name.
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AlgorithmParameterSpec |
getMGFParameters()
Returns the parameters for the mask generation function.
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int |
getSaltLength()
Returns the salt length in bits.
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int |
getTrailerField()
Returns the value for the trailer field, i.e.
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public static final PSSParameterSpec DEFAULT
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.public String getDigestAlgorithm()
public String getMGFAlgorithm()
public AlgorithmParameterSpec getMGFParameters()
public int getSaltLength()
public int getTrailerField()
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
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