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.

  • Field Details

    • LOGGER

      private static final org.slf4j.Logger LOGGER

    • BOUNCY_CASTLE_FACTORY

      private static final IBouncyCastleFactory BOUNCY_CASTLE_FACTORY

    • algorithmNames

      static final Map<String,String> algorithmNames
      Maps IDs of signature algorithms with its human-readable name.

    • rsaOidsByDigest

      static final Map<String,String> rsaOidsByDigest

    • dsaOidsByDigest

      static final Map<String,String> dsaOidsByDigest

    • ecdsaOidsByDigest

      static final Map<String,String> ecdsaOidsByDigest

  • Constructor Details

    • SignatureMechanisms

      public SignatureMechanisms()

  • Method Details

    • 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