THotPDF.ValidatePDFMAC Method

Validerar fristående eller signaturbifogad PDF MAC-data och returnerar strukturerad felinformation

Deklaration

function ValidatePDFMAC(const FileName: TFileName; const Password: AnsiString; out ValidationInfo: THPDFPDFMACValidationInfo): boolean; overload;
function ValidatePDFMAC(const FileName: TFileName; const Password: AnsiString; const Options: THPDFPDFMACOptions; out ValidationInfo: THPDFPDFMACValidationInfo): boolean; overload;

Användningsanteckningar

• THPDFPDFMACStatus distinguishes authentication, modification, truncation, malformed-data, and unsupported-algorithm failures
• THPDFPDFMACValidationInfo reports coverage, algorithm, digest, and authentication decisions
• THPDFPDFMACLocation distinguishes standalone, signature-attached, and unknown locations
• No decrypted plaintext is exposed before authentication succeeds
• pmsPolicyRejected skiljer ett korrekt tolkat men otillåtet digest- eller krypteringsläge från övriga fel
• Resultatet anger den detekterade digest-algoritmen, vald profil, policybeslut och användning av AES-256-GCM
• PermissionsAuthenticated confirms that encrypted /Perms matches /P, while MACRequiredByPermissions reports the authenticated PDF MAC requirement bit
• Attached validation resolves the active trailer SigObjRef, requires exactly one matching signature field, and verifies complete signature ByteRange coverage
• Location, SignatureObjectNumber, SignatureGeneration, FullFileCoverage, and SignatureDigestMatched report the verified attachment binding
• pmsSignatureBindingFailed skiljer ett digest-fel i det råa signaturvärdet från att dokumentet har ändrats

Se ValidatePDFMACChain för att autentisera varje inkrementell revision, eller PDF MAC Algorithm Agility and Policy Profiles för profilernas semantik