(Lianja) Get a .pfx/.p12 Safe Bag Attribute

Demonstrates how to get the value of a private key or certificate safe bag attribute. Safe bag attributes are associated with a key or certificate. They are attributes stored in the .p12/.pfx alongside a key or certificate.

Note: This example requires Chilkat v9.5.0.83 or greater.

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loPfx = createobject("CkPfx")

llSuccess = loPfx.LoadPfxFile("qa_data/pfx/test_ecdsa_secret.pfx","secret")
if (llSuccess = .F.) then
    ? loPfx.LastErrorText
    release loPfx
    return
endif

loJson = loPfx.LastJsonData()
loJson.EmitCompact = .F.
? loJson.Emit()
release loJson

// The LastJsonData provides information about the what is contained in the PFX after loading.
// For example:

// {
//   "authenticatedSafe": {
//     "contentInfo": [
//       {
//         "type": "Data",
//         "safeBag": [
//           {
//             "type": "pkcs8ShroudedKeyBag",
//             "attrs": {
//               "localKeyId": "16777216",
//               "keyContainerName": "{B99EB9E7-6AF7-42AF-A43A-D4B2225B7605}",
//               "msStorageProvider": "Microsoft Software Key Storage Provider"
//             }
//           }
//         ]
//       },
//       {
//         "type": "EncryptedData",
//         "safeBag": [
//           {
//             "type": "certBag",
//             "attrs": {
//               "localKeyId": "16777216"
//             },
//             "subject": "EE",
//             "serialNumber": "1a9da86df17ad411bb413b2aa724fe56fc71242d"
//           },
//           {
//             "type": "certBag",
//             "subject": "CA",
//             "serialNumber": "02742228acbf3dd2e71f403abd8281ab6d70d490"
//           }
//         ]
//       }
//     ]
//   }
// }

// Use this online tool to generate parsing code from sample JSON: 
// Generate Parsing Code from JSON

// In the above JSON, we can see the .pfx contains one private key (a pkcs8ShroudedKeyBag) and two certificates (each in a certBag).
// The certificates in a .pfx/.p12 are typicaly a single certificate with associated private key, along with the other certificates
// in the chain of authentication.

// We can see that the private key has 3 safebag attributes: localKeyId, keyContainerName, and msStorageProvider.
// The certificate associated with the private key contains one safebag attribute: localKeyId.
// Notice the localKeyId is the same.  The localKeyId helps associate the private key that corresponds to the given certificate.

// Let's demonstrate the GetSafeBagAttr method:

// Get each of the private key safebag attributes:
llGetPrivateKeyAttr = .T.
lnPrivateKeyIdx = 0
? "---- private key safebag attributes ----"
? loPfx.GetSafeBagAttr(llGetPrivateKeyAttr,lnPrivateKeyIdx,"localKeyId")
? loPfx.GetSafeBagAttr(llGetPrivateKeyAttr,lnPrivateKeyIdx,"keyContainerName")
? loPfx.GetSafeBagAttr(llGetPrivateKeyAttr,lnPrivateKeyIdx,"storageProvider")

// Get the localKeyId attribute for the 1st certificate.
llGetPrivateKeyAttr = .F.
? "---- cert safebag attributes ----"
? loPfx.GetSafeBagAttr(llGetPrivateKeyAttr,0,"localKeyId")


release loPfx