(Classic ASP) RSA Decrypt using PEM

This example demonstrates decryping RSA encrypted data that is base64 encoded. It uses a private key loaded from a PEM file.

Note: This example requires Chilkat v11.0.0 or greater.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
success = 0

' This example assumes the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

set rsa = Server.CreateObject("Chilkat.Rsa")

set key = Server.CreateObject("Chilkat.PrivateKey")

' Load an RSA private key from an unencrypted PEM file:
' (To load from an encrypted PEM file, call LoadEncryptedPemFile instead.)

success = key.LoadPemFile("qa_data/rsa/decryptTest/priv.pem")
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( key.LastErrorText) & "</pre>"
    Response.End
End If

' Make the key available to the RSA object
success = rsa.UsePrivateKey(key)
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( rsa.LastErrorText) & "</pre>"
    Response.End
End If

encryptedStr = "pP9XFJEsGgxPNHEgNiLB5H5ksCOXDk/G49BPTog1jKLAhYofV4UTH5k2TOYiqRnDnKs8+8uPoN/IxdiGXvuYG8HRzN0HtkhoZO/AxeyaB9S7eddCUlT0Pl2PEB2yQ9HG5rM7jqYOD6MAM4cuX7hqT8fa8tbzJzmBwdfFDBz94bwQjULHiO+gklIBC4vhkXT4yjuvEjxTAKU6tJeZYkBooJNdS/vE5RZRpuF6bGZU41Qc17qFR+iReBq+9f8IMmw8WR8fMbOCaygOfFS1nw7JVsIMGsAIXS8rUaJ/2DfGPfQx5HCiVtTOreGYRUI3esAQjnvUCnavZyQgs53nl7e2aA=="

rsa.EncodingMode = "base64"

usePrivateKey = 1
decryptedStr = rsa.DecryptStringENC(encryptedStr,usePrivateKey)

Response.Write "<pre>" & Server.HTMLEncode( "Decrypted:") & "</pre>"
Response.Write "<pre>" & Server.HTMLEncode( decryptedStr) & "</pre>"

%>
</body>
</html>