Xojo Plugin

Working with PEM Encrypted Private Keys

See more PEM Examples

Demonstrates how to load and save PEM encrypted private keys. Xojo Plugin

Dim success As Boolean
success = False

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

success = False

Dim pem As New Chilkat.Pem

Dim pemPassword As String
pemPassword = "secret"

// To load a PEM file containing encrypted private keys, simply
// provide the password.
success = pem.LoadPemFile("/Users/chilkat/testData/pem/pemContainingEncryptedPrivateKeys.pem",pemPassword)
If (success = False) Then
    System.DebugLog(pem.LastErrorText)
    Return
End If

Dim fac As New Chilkat.FileAccess
Dim pemText As String
pemText = fac.ReadEntireTextFile("/Users/chilkat/testData/pem/pemContainingEncryptedPrivateKeys.pem",pemPassword)

// To load a PEM from a string, call LoadPem instead of LoadPemFile:
success = pem.LoadPem(pemText)
If (success = False) Then
    System.DebugLog(pem.LastErrorText)
    Return
End If

// A few notes:
// The PEM may contain both private keys and certificates (or anything else).
// The password is utilized for whatever content in the PEM is encrypted.  
// It is OK to have both encrypted and non-encrypted content within a given PEM.

// PEM private keys can be encrypted in different formats.  The LoadPem and LoadPemFile
// methods automatically handle the different formats.
// One format is PKCS8 and is indicated by this delimiter within the PEM:

// -----BEGIN ENCRYPTED PRIVATE KEY-----
// MIICoTAbBgkqhkiG9w0BBQMwDgQIfdD0zv24lgkCAggABIICgE0PdHJmRbNs6cBX
// ...

// Another format, we'll call "passphrase" looks like this in the PEM:
// -----BEGIN RSA PRIVATE KEY-----
// Proc-Type: 4,ENCRYPTED
// DEK-Info: DES-EDE3-CBC,A4215544D11C5D0C
// 
// paqy9XRexcSjurHfG0xhCaUD0HrvIdhuC0CbRxxxeMlkLaV6+uT80rBxt2AaibWG
// ...

// Show the bit length of each private key:
Dim i As Int32
Dim numPrivateKeys As Int32
numPrivateKeys = pem.NumPrivateKeys
If (numPrivateKeys = 0) Then
    System.DebugLog((("Error: Expected the PEM to contain private keys.")))
    Return
End If

Dim privKey As New Chilkat.PrivateKey
For i = 1 To numPrivateKeys
    success = pem.PrivateKeyAt(i - 1,privKey)
    System.DebugLog(Str(i) + ": " + Str(privKey.BitLength) + " bits")
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