Xbase++

Add a PFX Source (BinData) for S/MIME Decryption

Demonstrates the Chilkat Imap.AddPfxSourceBd method, which adds PFX data held in a BinData as a source of certificates and private keys for S/MIME processing. The first argument is the BinData and the second is the PFX password. Call it once for each additional source.

Note: The certificate path is relative to the application's current working directory. Supply the path to your own certificate file.

Background: When downloading encrypted (S/MIME) email, Chilkat needs the recipient's private key to decrypt it. Adding one or more PFX sources gives Chilkat a pool of keys to search; the matching key is used automatically as messages are fetched. The BinData form is handy when the PFX comes from memory — a database blob or a downloaded buffer — rather than a file on disk. On Windows and macOS the system certificate stores are also searched automatically.

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LOCAL nSuccess
LOCAL oImap
LOCAL oBdPfx
LOCAL cPfxPassword

nSuccess := 0

//  Demonstrates the Imap.AddPfxSourceBd method, which adds PFX data (from a BinData) as a
//  source of certificates and private keys for S/MIME decryption.  The 1st argument is the
//  BinData containing the PFX, and the 2nd is the PFX password.

oImap := CreateObject("Chilkat.Imap")

oImap:Ssl := 1
oImap:Port := 993

nSuccess := oImap:Connect("imap.example.com")
IF (nSuccess == 0)
    ? oImap:LastErrorText
    oImap:destroy()
    RETURN
ENDIF

nSuccess := oImap:Login("user@example.com", "myPassword")
IF (nSuccess == 0)
    ? oImap:LastErrorText
    oImap:destroy()
    RETURN
ENDIF

//  Load the PFX data into a BinData.
oBdPfx := CreateObject("Chilkat.BinData")
nSuccess := oBdPfx:LoadFile("qa_data/smime.pfx")
IF (nSuccess == 0)
    ? oBdPfx:LastErrorText
    oImap:destroy()
    oBdPfx:destroy()
    RETURN
ENDIF

//  The PFX password is not hard-coded in source.  Insert code here to obtain it from an
//  interactive prompt, environment variable, or a secrets vault.

//  Add the PFX as a source for S/MIME certificates and private keys.  Call once per source.
nSuccess := oImap:AddPfxSourceBd(oBdPfx, cPfxPassword)
IF (nSuccess == 0)
    ? oImap:LastErrorText
    oImap:destroy()
    oBdPfx:destroy()
    RETURN
ENDIF

//  Messages downloaded after this are automatically decrypted when a matching key is found.

nSuccess := oImap:Disconnect()
IF (nSuccess == 0)
    ? oImap:LastErrorText
    oImap:destroy()
    oBdPfx:destroy()
    RETURN
ENDIF

oImap:destroy()
oBdPfx:destroy()