Interface IExternalSignature

  • All Known Implementing Classes:
    PrivateKeySignature

    public interface IExternalSignature
    Interface that needs to be implemented to do the actual signing. For instance: you'll have to implement this interface if you want to sign a PDF using a smart card.
    • Method Detail

      • getDigestAlgorithmName

        java.lang.String getDigestAlgorithmName()
        Returns the digest algorithm.
        Returns:
        The digest algorithm (e.g. "SHA-1", "SHA-256,...").
      • getSignatureAlgorithmName

        java.lang.String getSignatureAlgorithmName()
        Returns the signature algorithm used for signing, disregarding the digest function.
        Returns:
        The signature algorithm ("RSA", "DSA", "ECDSA", "Ed25519" or "Ed448").
      • getSignatureMechanismParameters

        ISignatureMechanismParams getSignatureMechanismParameters()
        Return the algorithm parameters that need to be encoded together with the signature mechanism identifier. If there are no parameters, return `null`. A non-null value is required for RSASSA-PSS; see RSASSAPSSMechanismParams.
        Returns:
        algorithm parameters
      • sign

        byte[] sign​(byte[] message)
             throws java.security.GeneralSecurityException
        Signs the given message using the encryption algorithm in combination with the hash algorithm.
        Parameters:
        message - The message you want to be hashed and signed.
        Returns:
        A signed message digest.
        Throws:
        java.security.GeneralSecurityException - when requested cryptographic algorithm or security provider is not available