c_digital_signature_extensions.h File Reference

Extension methods for DigitalSignature objects. More...

#include "vanillapdf/c_export.h"
#include "vanillapdf/c_handles.h"
#include "vanillapdf/c_values.h"
#include "vanillapdf/utils/c_signature_verifier.h"

Go to the source code of this file.

Functions
error_type CALLING_CONVENTION	DigitalSignatureExtensions_Verify (DigitalSignatureHandle *signature, DocumentHandle *document, TrustedCertificateStoreHandle *trusted_store, SignatureVerificationSettingsHandle *settings, SignatureVerificationResultHandle **result)
	Verify the digital signature in a PDF document.

Detailed Description

Extension methods for DigitalSignature objects.

Function Documentation

DigitalSignatureExtensions_Verify()

error_type CALLING_CONVENTION DigitalSignatureExtensions_Verify	(	DigitalSignatureHandle *	signature,
		DocumentHandle *	document,
		TrustedCertificateStoreHandle *	trusted_store,
		SignatureVerificationSettingsHandle *	settings,
		SignatureVerificationResultHandle **	result
	)

Verify the digital signature in a PDF document.

Parameters

signature	The digital signature object to verify
document	The PDF document containing the signature
trusted_store	Certificate store for chain validation (required)
settings	Verification settings (optional, can be NULL for defaults)
result	Output verification result

This extension method:

1. Extracts the ByteRange from the signature
2. Reads the signed bytes from the document file using ByteRange
3. Extracts the signature Contents (PKCS#7 blob)
4. Calls SignatureVerifier_Verify with the extracted data
5. Returns comprehensive verification result

Note

The signature must contain valid ByteRange and Contents entries. The document must be the same document from which the signature was obtained. If settings is NULL, default settings are used (all flags disabled).

See also

SignatureVerifier_Verify for low-level signature verification

Examples

verify.c.