Classic ASP Requires Chilkat v11.0.0+
Classic ASP
Rewrite PFX using AES256-SHA256
See more PFX/P12 Examples
Demonstrates how to load a .pfx/.p12, examine the encryption algorithm used, and rewrite using aes256-sha256.Chilkat Classic ASP Downloads
<html>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<body>
<%
success = 0
set pfx = Server.CreateObject("Chilkat.Pfx")
' Let's load a .pfx and examine the encryption algorithms used to protect the private key:
success = pfx.LoadPfxFile("qa_data/pfx/test_secret.pfx","secret")
If (success = 0) Then
Response.Write "<pre>" & Server.HTMLEncode( pfx.LastErrorText) & "</pre>"
Response.End
End If
' Examine the algorithms:
' "pbeWithSHAAnd3_KeyTripleDES_CBC" or "pbes2"?
Response.Write "<pre>" & Server.HTMLEncode( "Algorithm: " & pfx.AlgorithmId) & "</pre>"
' If the algorithm is "pbes2" then examine the actual encryption and HMAC algorithms used within pbes2.
' (If the algorithm is NOT "pbes2", then the following properties are meaningless and will not be modified from their previous values prior to loading the PFX.)
Response.Write "<pre>" & Server.HTMLEncode( "Pbes2CryptAlg: " & pfx.Pbes2CryptAlg) & "</pre>"
Response.Write "<pre>" & Server.HTMLEncode( "Pbes2HmacAlg: " & pfx.Pbes2HmacAlg) & "</pre>"
' Our output so far:
' Algorithm: pbeWithSHAAnd3_KeyTripleDES_CBC
' Pbes2CryptAlg: aes256-cbc
' Pbes2HmacAlg: hmacWithSha256
' This tells us that the PFX we loaded was protected using triple-DES with SHA1.
' (Most existing .pfx/.p12 files use 3DES w/ SHA1.)
' The Pbes2CryptAlg and Pbes2HmacAlg properties do not apply here because the AlgorithmId is not equal to "pbes2". We can ignore those values.
' Examine the last JSON data collected in the call to LoadPfxFile. This gives us information about what is contained in the PFX, including extended attributes.
set json = Server.CreateObject("Chilkat.JsonObject")
pfx.GetLastJsonData json
json.EmitCompact = 0
Response.Write "<pre>" & Server.HTMLEncode( json.Emit()) & "</pre>"
' Sample output
' Use this online tool to generate parsing code from sample JSON:
' Generate Parsing Code from JSON
' {
' "authenticatedSafe": {
' "contentInfo": [
' {
' "type": "Data",
' "safeBag": [
' {
' "type": "pkcs8ShroudedKeyBag",
' "attrs": {
' "localKeyId": "16444216",
' "keyContainerName": "{F09B755A-1E90-444D-9851-02B86CA14961}",
' "msStorageProvider": "Microsoft Enhanced Cryptographic Provider v1.0"
' }
' }
' ]
' },
' {
' "type": "EncryptedData",
' "safeBag": [
' {
' "type": "certBag",
' "attrs": {
' "localKeyId": "16444216"
' },
' "subject": "....",
' "serialNumber": "9999999999999999999999999999"
' },
' {
' "type": "certBag",
' "attrs": {
' "authRootSha256Hash": "0vkOXTXKxNQffUTOZq/4heGBX7M5GFhTqH5mwFyb7x4=",
' "friendlyName": "XYZ",
' "enhKeyUsage": [
' {
' "oid": "1.3.6.1.5.5.7.3.2",
' "usage": "clientAuth"
' },
' {
' "oid": "1.3.6.1.5.5.7.3.4",
' "usage": "emailProtection"
' },
' {
' "oid": "1.3.6.1.5.5.7.3.3",
' "usage": "codeSigning"
' },
' {
' "oid": "1.3.6.1.5.5.7.3.8",
' "usage": "timeStamping"
' },
' {
' "oid": "1.3.6.1.4.1.311.10.3.4",
' "usage": "encryptedFileSystem"
' },
' {
' "oid": "1.3.6.1.5.5.8.2.2",
' "usage": "iKEIntermediate"
' },
'
' {
' "oid": "1.3.6.1.5.5.7.3.6",
' "usage": "ipsecTunnel"
' },
' {
' "oid": "1.3.6.1.5.5.7.3.7",
' "usage": "ipsecUser"
' },
' {
' "oid": "1.3.6.1.5.5.7.3.5",
' "usage": "ipsecEndSystem"
' }
' ]
' },
' "subject": "...",
' "serialNumber": "8888888888888888888888888888"
' },
' {
' "type": "certBag",
' "subject": "...",
' "serialNumber": "777777777777777777777777777"
' }
' ]
' }
' ]
' }
' }
' ------------------------------------------------------------------------------------------
' OK... now let's change the AlgorithmId to "pbes2"
pfx.AlgorithmId = "pbes2"
' We already know from above that the PBES2 crypt and HMAC algorithms are "aes256-cbc" and "hmacWithSha256".
' Let's set them anyway just for the example...
pfx.Pbes2CryptAlg = "aes256-cbc"
pfx.Pbes2HmacAlg = "hmacWithSha256"
' Rewrite the PFX using pbes2/aes256 + sha256
success = pfx.ToFile("secret","qa_output/test_secret_aes256.pfx")
If (success = 0) Then
Response.Write "<pre>" & Server.HTMLEncode( pfx.LastErrorText) & "</pre>"
Response.End
End If
Response.Write "<pre>" & Server.HTMLEncode( "Success.") & "</pre>"
%>
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