(Visual Basic 6.0) RSA Sign with PKCS8 Encrypted Key
Demonstrates how to load a private key from an encrypted PKCS8 file and create an RSA digital signature.Note: This example requires Chilkat v11.0.0 or greater.
Dim success As Long
success = 0
' This example assumes the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.
Dim pkey As New PrivateKey
' Load the private key from an RSA PEM file:
success = pkey.LoadPkcs8EncryptedFile("privateKey.key","myPassword")
Dim rsa As New ChilkatRsa
' Import the private key into the RSA object:
success = rsa.UsePrivateKey(pkey)
If (success = 0) Then
Debug.Print rsa.LastErrorText
Exit Sub
End If
' Return the signature in hex
rsa.EncodingMode = "hex"
Dim strData As String
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".
Dim hexSig As String
hexSig = rsa.SignStringENC(strData,"sha-1")
Debug.Print hexSig
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