CertificateCheckFileSignatureFile (Function)

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CertificateCheckFileSignatureFile (Function)

In french: CertificatVérifieFichierSignatureFichier

Checks the correspondence between a signature and a file. The signature was kept as an external file.

Example

MyCertificate is Certificate

// Open the certificate picker of Windows
MyCertificate = CertificateSelect()

// Cancellation or error
IF MyCertificate.Name = "" THEN
	RETURN
END

// Checks whether the selected certificate is valid for signing
IF MyCertificate.ValidForSignature = False THEN
	Info("The selected certificate cannot be used to generate a signature.")
	RETURN
END

// Retrieve the file containing the signature
bufSignature is Buffer
bufSignature = CertificateSignFile(FullFileName, MyCertificate, MySignatureFile)


// Check the signature
SWITCH CertificateCheckFileSignatureFile(FullFileName, MySignatureFile)
	CASE certificateOk: Info("Valid signature and reliable certificate")
	CASE certificateInvalid: Info("Invalid signature or certificate")
	CASE certificateExpired: Info("Valid signature but certificate expired")
	CASE certificateUntrusted: Info("Valid signature but trusted root" + ...
		"of certificate not reliable")
END

Syntax

<Result> = CertificateCheckFileSignatureFile(<File name> , <Signature file>)

<Result>: Integer constant

Result of signature check:
certificateExpired Valid signature but expired certificate.
certificateInvalid Invalid signature or certificate.
certificateOk Trusted signature and certificate.
certificateUntrusted Valid signature but untrusted certificate root.

<File name>: Character string

Full or relative name of the file on which the check must be performed.

<Signature file>: Character string

Full or relative name of the external file containing the signature. This file is created by CertificateSignFile.

Remarks

Component: wd300std.dll