(DataFlex) Rewrite PFX using AES256-SHA256

Demonstrates how to load a .pfx/.p12, examine the encryption algorithm used, and rewrite using aes256-sha256.

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

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-win32.pkg

Procedure Test
    Handle hoPfx
    Boolean iSuccess
    Variant vJson
    Handle hoJson
    String sTemp1

    // This example requires Chilkat v9.5.0.83 or greater.

    Get Create (RefClass(cComChilkatPfx)) To hoPfx
    If (Not(IsComObjectCreated(hoPfx))) Begin
        Send CreateComObject of hoPfx
    End

    // Let's load a .pfx and examine the encryption algorithms used to protect the private key:
    Get ComLoadPfxFile Of hoPfx "qa_data/pfx/test_secret.pfx" "secret" To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoPfx To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Examine the algorithms:

    // "pbeWithSHAAnd3_KeyTripleDES_CBC" or "pbes2"?
    Get ComAlgorithmId Of hoPfx To sTemp1
    Showln "Algorithm: " sTemp1

    // 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.)
    Get ComPbes2CryptAlg Of hoPfx To sTemp1
    Showln "Pbes2CryptAlg: " sTemp1
    Get ComPbes2HmacAlg Of hoPfx To sTemp1
    Showln "Pbes2HmacAlg: " sTemp1

    // 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 LastJsonData for the call to LoadPfxFile.  This gives us information about what is contained in the PFX, including extended attributes.
    Get ComLastJsonData Of hoPfx To vJson
    If (IsComObject(vJson)) Begin
        Get Create (RefClass(cComChilkatJsonObject)) To hoJson
        Set pvComObject Of hoJson To vJson
    End
    Set ComEmitCompact Of hoJson To False
    Get ComEmit Of hoJson To sTemp1
    Showln sTemp1

    Send Destroy of hoJson

    // Here's a sample LastJsonData:

    // 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" 

    Set ComAlgorithmId Of hoPfx To "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...
    Set ComPbes2CryptAlg Of hoPfx To "aes256-cbc"
    Set ComPbes2HmacAlg Of hoPfx To "hmacWithSha256"

    // Rewrite the PFX using pbes2/aes256 + sha256
    Get ComToFile Of hoPfx "secret" "qa_output/test_secret_aes256.pfx" To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoPfx To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Showln "Success."


End_Procedure