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Package com.itextpdf.signatures

Added Classes and Interfaces
IIssuingCertificateRetriever Interface helper to support retrieving CAIssuers certificates from Authority Information Access (AIA) Extension in order to support certificate chains with missing certificates and getting CRL response issuer certificates.
IssuingCertificateRetriever IIssuingCertificateRetriever default implementation.
LtvVerification.RevocationDataNecessity Option to determine whether revocation information is required for the signing certificate.
PadesTwoPhaseSigningHelper Helper class to perform signing operation in two steps.
PdfTwoPhaseSigner  
 

Changed Classes
CertificateUtil This class contains a series of static methods that allow you to retrieve information from a Certificate.
DigestAlgorithms Class that contains a map with the different message digest algorithms.
LtvVerification Add verification according to PAdES-LTV (part 4).
OID.X509Extensions Contains all OIDs used by iText in the context of Certificate Extensions.
PdfPKCS7 This class does all the processing related to signing and verifying a PKCS#7 / CMS signature.
PdfPadesSigner This class performs signing with PaDES related profiles using provided parameters.
PdfSignatureAppearance Provides convenient methods to make a signature appearance.
PdfSigner Takes care of the cryptographic options and appearances that form a signature.
SecurityIDs A list of IDs that are used by the security classes
SignerProperties Properties to be used in signing operations.
TSAClientBouncyCastle Time Stamp Authority Client interface implementation using Bouncy Castle org.bouncycastle.tsp package.