DataFlex
DataFlex
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 DataFlex Downloads
Use ChilkatAx-win32.pkg
Procedure Test
Boolean iSuccess
Handle hoPfx
Variant vJson
Handle hoJson
String sTemp1
Move False To iSuccess
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 last JSON data collected in the call to LoadPfxFile. This gives us information about what is contained in the PFX, including extended attributes.
Get Create (RefClass(cComChilkatJsonObject)) To hoJson
If (Not(IsComObjectCreated(hoJson))) Begin
Send CreateComObject of hoJson
End
Get pvComObject of hoJson to vJson
Send ComGetLastJsonData To hoPfx vJson
Set ComEmitCompact Of hoJson To False
Get ComEmit Of hoJson To sTemp1
Showln sTemp1
// 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"
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