CertificateCheckFileSignatureFile (Function)

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Managing certificates in WEBDEV

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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()

// Cancelation 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 trusted certificate")
CASE certificateInvalid: Info("Invalid signature or certificate")
CASE certificateExpired: Info("Valid signature but expired certificate")
CASE certificateUntrusted: Info("Valid signature but root confidence " + ...
"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

Managing certificates in WEBDEV

In order for the certificates to be visible to the site user, they must be installed on the server in the store of custom certificates of the Internet user.

Component: wd270std.dll