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(VBScript) CAdES BES Attached (Opaque) Signature

Demonstrates how to create a CAdES BES attached signature file (.p7m). This is a PKCS7 signature format (known as an opaque, or "attached" signature) where the file data is embedded within the signature file. The signature verification both verifies the signature and extracts the original data.

(A "detached" signature is where the original data is NOT included within the PKCS7 signature format.)

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
Set outFile = fso.CreateTextFile("output.txt", True)

set crypt = CreateObject("Chilkat_9_5_0.Crypt2")

'  Any string argument automatically begins the 30-day trial.
success = crypt.UnlockComponent("30-day trial")
If (success <> 1) Then
    outFile.WriteLine(crypt.LastErrorText)
    WScript.Quit
End If

'  Use a digital certificate and private key from a PFX file (.pfx or .p12).
pfxPath = "qa_data/pfx/myCertAndPrivateKey.p12"
pfxPassword = "password"

set cert = CreateObject("Chilkat_9_5_0.Cert")
success = cert.LoadPfxFile(pfxPath,pfxPassword)
If (success <> 1) Then
    outFile.WriteLine(cert.LastErrorText)
    WScript.Quit
End If

'  Tell the crypt component to use this cert.
success = crypt.SetSigningCert(cert)
If (success <> 1) Then
    outFile.WriteLine(crypt.LastErrorText)
    WScript.Quit
End If

'  The CadesEnabled property applies to all methods that create PKCS7 signatures.
'  To create a CAdES-BES signature, set this property equal to true.
crypt.CadesEnabled = 1

'  To sign with SHA1, set the HashAlgorithm property to "sha1"
crypt.HashAlgorithm = "sha1"

'  To sign with SHA256, set the HashAlgorithm property to "SHA256".
crypt.HashAlgorithm = "sha256"

'  Other hash algorithm choices are "md5", "md2", "sha384", and "sha512"

'  We can sign any type of file, creating a .p7m as output.
'  The .p7m contains the signature and also embeds the data of the file that is signed.
inFile = "qa_data/json/sample.json"
sigFile = "qa_output/signature.p7m"

'  Create the CAdES-BES attached signature, which contains the original data.
success = crypt.CreateP7M(inFile,sigFile)
If (success = 0) Then
    outFile.WriteLine(crypt.LastErrorText)
    WScript.Quit
End If

'  Verify the .p7m file and extract the original file from the .p7m.
extractedToFilePath = "qa_output/sample.json"
success = crypt.VerifyP7M(sigFile,extractedToFilePath)
If (success = 0) Then
    outFile.WriteLine(crypt.LastErrorText)
    WScript.Quit
End If

outFile.WriteLine("Success!")

outFile.Close

 

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