de.flexiprovider.core.rsa
Class PSSParameterSpec

java.lang.Object
  |
  +--de.flexiprovider.core.rsa.PSSParameterSpec

All Implemented Interfaces:

AlgorithmParameterSpec, java.security.spec.AlgorithmParameterSpec

Direct Known Subclasses:

PSSParameterSpec.SHA1, PSSParameterSpec.SHA256

public class PSSParameterSpec

extends java.lang.Object

implements AlgorithmParameterSpec

This class specifies parameters for the RSASSA-PSS signature algorithm (implemented by RSASignaturePSS). The parameters consist of the OIDs of a hash function and a mask generation function, a salt length, and a trailer field value.

The default hash function is SHA1 (1.3.14.3.2.26). The only supported mask generation function is MGF1 (1.2.840.113549.1.1.8). The default salt length is 20 bytes. The only supported trailer field value is trailerFieldBC(1).

Author:

Martin Döring

Inner Class Summary

static class	PSSParameterSpec.SHA1 Parameter set (md = "1.3.14.3.2.26" (SHA1), saltLen = 20)
static class	PSSParameterSpec.SHA256 Parameter set (md = "2.16.840.1.101.3.4.2.1" (SHA256), saltLen = 32)

Field Summary

static java.lang.String	DEFAULT_MD The OID of the default message digest (SHA1, 1.3.14.3.2.26)
static java.lang.String	DEFAULT_MGF The OID of the default mask generation function (MGF1)
static int	DEFAULT_SALT_LENGTH The default salt length (20 bytes)
static int	DEFAULT_TRAILER_FIELD The default trailer field (trailerFieldBC, value 1)

Constructor Summary

PSSParameterSpec()
Construct the default PSS parameters.

PSSParameterSpec(java.lang.String md, int saltLength)
Construct new PSS parameters from the given name of the message digest and salt length.

Method Summary

boolean	equals(java.lang.Object other) Compare the parameters with another object
java.lang.String	getMD()
int	getSaltLength()
int	hashCode()
java.lang.String	toString()

Methods inherited from class java.lang.Object

, clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

DEFAULT_MD

public static final java.lang.String DEFAULT_MD

The OID of the default message digest (SHA1, 1.3.14.3.2.26)

DEFAULT_MGF

public static final java.lang.String DEFAULT_MGF

The OID of the default mask generation function (MGF1)

DEFAULT_SALT_LENGTH

public static final int DEFAULT_SALT_LENGTH

The default salt length (20 bytes)

DEFAULT_TRAILER_FIELD

public static final int DEFAULT_TRAILER_FIELD

The default trailer field (trailerFieldBC, value 1)

Constructor Detail

PSSParameterSpec

public PSSParameterSpec()

Construct the default PSS parameters. Choose the DEFAULT_MD and the DEFAULT_SALT_LENGTH.

PSSParameterSpec

public PSSParameterSpec(java.lang.String md,
                        int saltLength)

Construct new PSS parameters from the given name of the message digest and salt length. If the message digest name is invalid, choose the DEFAULT_MD. If the salt length is invalid, choose the DEFAULT_SALT_LENGTH.

Parameters:

md - the name of the message digest

saltLength - the salt length (in bytes)

Method Detail

getMD

public java.lang.String getMD()

Returns:

the OID of the message digest

getSaltLength

public int getSaltLength()

Returns:

the salt length in bytes

equals

public boolean equals(java.lang.Object other)

Compare the parameters with another object

Overrides:

equals in class java.lang.Object

Parameters:

other - the other object

Returns:

the result of the comparison

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

Returns:

the hash code of the parameters

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

Returns:

a human readable form of the parameters