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VBScript Examples

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(VBScript) RSA Sign with PKCS8 Encrypted Key

Demonstrates how to load a private key from an encrypted PKCS8 file and create an RSA digital signature.

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 pkey = CreateObject("Chilkat_9_5_0.PrivateKey")

'  Load the private key from an RSA PEM file:
success = pkey.LoadPkcs8EncryptedFile("privateKey.key","myPassword")

'  Get the private key in XML format:
pkeyXml = pkey.GetXml()

set rsa = CreateObject("Chilkat_9_5_0.Rsa")

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

'  Import the private key into the RSA component:
success = rsa.ImportPrivateKey(pkeyXml)
If (success <> 1) Then
    outFile.WriteLine(rsa.LastErrorText)
    WScript.Quit
End If

'  This example will sign a string, and receive the signature
'  in a hex-encoded string.  Therefore, set the encoding mode
'  to "hex":
rsa.EncodingMode = "hex"

'  If some other non-Chilkat application or web service is going to be verifying
'  the signature, it is important to match the byte-ordering.
'  The LittleEndian property may be set to 1
'  for little-endian byte ordering,
'  or 0  for big-endian byte ordering.
'  Microsoft apps typically use little-endian, while
'  OpenSSL and other services (such as Amazon CloudFront)
'  use big-endian.
rsa.LittleEndian = 0

strData = "This is the string to be signed."

'  Sign the string using the sha-1 hash algorithm.
'  Other valid choices are "md2", "sha256", "sha384", "sha512",  and "md5".
hexSig = rsa.SignStringENC(strData,"sha-1")

outFile.WriteLine(hexSig)

outFile.Close

 

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