Package com.itextpdf.signatures

Class RSASSAPSSMechanismParams

java.lang.Object

com.itextpdf.signatures.RSASSAPSSMechanismParams

All Implemented Interfaces:

IApplicableSignatureParams, ISignatureMechanismParams

       public class RSASSAPSSMechanismParams extends Object implements IApplicableSignatureParams
      

Encode the signer's parameters for producing an RSASSA-PSS signature. Note that this class is intended for use in the signing process only, so it does not need to be able to represent all possible parameter configurations; only the ones we consider reasonable. For the purposes of this class, the mask generation function is always MGF1, and the associated digest function is the same as the digest function used in the signing process.

Field Summary

Fields

Modifier and Type	Field	Description
static final int	DEFAULT_TRAILER_FIELD	Default value of the trailer field parameter.

Constructor Summary

Constructors

Constructor	Description
RSASSAPSSMechanismParams(IASN1ObjectIdentifier digestAlgoOid, int saltLen, int trailerField)	Instantiate RSASSA-PSS parameters with MGF1 for a given digest algorithm OID, salt length and trailer field value.

Method Summary

Modifier and Type	Method	Description
void	apply(Signature signature)	Apply the parameters to a Signature.
static RSASSAPSSMechanismParams	createForDigestAlgorithm(String digestAlgorithmName)	Instantiate RSASSA-PSS parameters with MGF1 for the given algorithm name.
IASN1Encodable	toEncodable()	Represent the parameters as an IASN1Encodable for inclusion in a signature object.

Methods inherited from class java.lang.Object

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

Field Details

DEFAULT_TRAILER_FIELD

             public static final int DEFAULT_TRAILER_FIELD
            

Default value of the trailer field parameter.

See Also:

• Constant Field Values

Constructor Details

RSASSAPSSMechanismParams

             public RSASSAPSSMechanismParams
             (IASN1ObjectIdentifier digestAlgoOid, int saltLen, int trailerField)
            

Instantiate RSASSA-PSS parameters with MGF1 for a given digest algorithm OID, salt length and trailer field value.

Parameters:

digestAlgoOid - the digest algorithm OID that will be used for both the digest and MGF

saltLen - the salt length

trailerField - the trailer field

Method Details

createForDigestAlgorithm

             public static RSASSAPSSMechanismParams createForDigestAlgorithm
             (String digestAlgorithmName)
            

Instantiate RSASSA-PSS parameters with MGF1 for the given algorithm name.

Parameters:

digestAlgorithmName - the name of the digest algorithm

Returns:

RSASSA-PSS parameters with MGF1 for the given algorithm name.

toEncodable

             public IASN1Encodable toEncodable()
            

Represent the parameters as an IASN1Encodable for inclusion in a signature object.

Specified by:

toEncodable in interface ISignatureMechanismParams

Returns:

an IASN1Encodable object

apply

             public void apply
             (Signature signature)
            

Apply the parameters to a Signature.

Specified by:

apply in interface IApplicableSignatureParams

Parameters:

signature - an uninitialised Signature object