AlgorithmParameterSpec
public class PSSParameterSpec extends Object implements AlgorithmParameterSpec
Its ASN.1 definition in the 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 -- }
Modifier and Type | Field | Description |
---|---|---|
static final PSSParameterSpec |
DEFAULT |
Deprecated. This field uses the default values defined in the PKCS #1 standard. |
static final int |
TRAILER_FIELD_BC |
The TrailerFieldBC constant as defined in the PKCS #1 standard. |
Constructor | Description |
---|---|
PSSParameterSpec |
Deprecated. This constructor uses the default values defined in the PKCS #1 standard except for the salt length. |
PSSParameterSpec |
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 | 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. |
int |
getSaltLength() |
Returns the salt length in bytes. |
int |
getTrailerField() |
Returns the value for the trailer field. |
public static final int TRAILER_FIELD_BC
TrailerFieldBC
constant as defined in the PKCS #1 standard.@Deprecated(since="19") public static final PSSParameterSpec DEFAULT
PSSParameterSpec
with the desired parameter values using the PSSParameterSpec(String, String, AlgorithmParameterSpec, int, int)
constructor.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 functionmgfName
- the algorithm name of the mask generation functionmgfSpec
- the parameters for the mask generation function. If null is specified, null will be returned by getMGFParameters().saltLen
- the length of salt in bytestrailerField
- the value of the trailer fieldNullPointerException
- if mdName
, or mgfName
is nullIllegalArgumentException
- if saltLen
or trailerField
is less than 0@Deprecated(since="19") public PSSParameterSpec(int saltLen)
PSSParameterSpec(String, String, AlgorithmParameterSpec, int, int)
constructor.PSSParameterSpec
using the specified salt length and other default values as defined in the PKCS #1 standard.saltLen
- the length of salt in bytesIllegalArgumentException
- if saltLen
is less than 0public String getDigestAlgorithm()
public String getMGFAlgorithm()
public AlgorithmParameterSpec getMGFParameters()
public int getSaltLength()
public int getTrailerField()
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https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/security/spec/PSSParameterSpec.html