com.itextpdf.signatures

Class SignatureMechanisms

java.lang.Object

com.itextpdf.signatures.SignatureMechanisms

public class SignatureMechanisms
extends Object

Class that contains OID mappings to extract a signature algorithm name from a signature mechanism OID, and conversely, to retrieve the appropriate signature mechanism OID given a signature algorithm and a digest function.

Constructor Summary

Constructors

Constructor and Description
SignatureMechanisms()

Method Summary

Modifier and Type	Method and Description
static String	getAlgorithm(String oid) Gets the algorithm name for a certain id.
static String	getMechanism(String oid, String digest) Get the signing mechanism name for a certain id and digest.
static String	getSignatureMechanismOid(String signatureAlgorithmName, String digestAlgorithmName) Attempt to look up the most specific OID for a given signature-digest combination.

Methods inherited from class java.lang.Object

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

Constructor Detail

SignatureMechanisms

public SignatureMechanisms()

Method Detail

getSignatureMechanismOid

public static String getSignatureMechanismOid(String signatureAlgorithmName,
                                              String digestAlgorithmName)

Attempt to look up the most specific OID for a given signature-digest combination.

Parameters:

signatureAlgorithmName - the name of the signature algorithm

digestAlgorithmName - the name of the digest algorithm, if any

Returns:

an OID string, or null if none was found.

getAlgorithm

public static String getAlgorithm(String oid)

Gets the algorithm name for a certain id.

Parameters:

oid - an id (for instance "1.2.840.113549.1.1.1")

Returns:

an algorithm name (for instance "RSA")

getMechanism

public static String getMechanism(String oid,
                                  String digest)

Get the signing mechanism name for a certain id and digest.

Parameters:

oid - an id of an algorithm

digest - digest of an algorithm

Returns:

name of the mechanism