THotPDF.RenewPAdESLTATimestamp Method

Extends a PAdES-LTA archive timestamp chain through a transactional incremental update

Declaration

class function RenewPAdESLTATimestamp(const InputPDFPath, OutputPDFPath: string; const GetDocumentTimeStamp: THPDFCMSTimestampCallback; ContentsBytes: Integer= 16384): boolean; overload;
class function RenewPAdESLTATimestamp(const InputPDFPath, OutputPDFPath: string; const GetDocumentTimeStamp: THPDFCMSTimestampCallback; DigestAlgorithm: THPDFCMSDigestAlgorithm; ContentsBytes: Integer= 16384): boolean; overload;
class function RenewPAdESLTATimestamp(const InputPDFPath, OutputPDFPath: string; const GetDocumentTimeStamp: THPDFCMSTimestampCallback; const Evidence: THPDFPAdESLTAEvidence; ContentsBytes: Integer= 16384): boolean; overload;
class function RenewPAdESLTATimestamp(const InputPDFPath, OutputPDFPath: string; const GetDocumentTimeStamp: THPDFCMSTimestampCallback; const Evidence: THPDFPAdESLTAEvidence; DigestAlgorithm: THPDFCMSDigestAlgorithm; ContentsBytes: Integer= 16384): boolean; overload;

Evidence

THPDFPAdESLTAEvidence carries Certificates, OCSPResponses, and CRLs as arrays of DER byte arrays

Usage notes

• The compatibility overload uses SHA-256, while the digest overload accepts SHA-256, SHA-384, SHA-512, SHA3-256, SHA3-384, or SHA3-512
• Evidence is appended to the existing DSS before the new document timestamp is created, so the timestamp byte range seals the extended validation material
• Existing DSS arrays are reused and exact duplicate DER values are referenced once across successive incremental revisions
• The callback receives the selected digest of the new PDF byte ranges
• The returned TimeStampToken must contain the same digest OID and message-imprint bytes
• SHA3 renewal declares the ISO 32001 PDF 2.0 developer extension in the appended revision
• Every earlier source byte, signature, timestamp, and DSS revision remains byte-identical
• Increase ContentsBytes when a TSA returns a large certificate chain