CertificateCheckFileSignatureBuffer (Function)

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Certificate management functions

Prefix syntax

CertificateCheckFileSignatureBuffer

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Example

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CertificateCheckFileSignatureBuffer (Function)

In french: CertificatVérifieFichierSignatureBuffer

Checks the correspondence between a signature and a file. The signature was stored as a Buffer variable.

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 buffer containing the signature
bufSignature is Buffer
bufSignature = CertificateSignFile(FullFileName, MyCertificate)

// Check the signature
SWITCH CertificateCheckFileSignatureBuffer(FullFileName, bufSignature)
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> = CertificateCheckBufferSignatureFile(<File name> , <Signature buffer>)

<Result>: Integer

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 buffer>: Buffer

Buffer containing the signature of the file. This buffer is returned by CertificateSignFile.

Remarks

Component: wd270std.dll