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Set the Decryption Certificate and Private Key

Demonstrates the Chilkat MailMan.SetDecryptCert2 method, which explicitly specifies both the certificate and its associated private key, as separate objects, to use when decrypting S/MIME encrypted email. This example loads a .cer certificate and a PEM private key, registers both, and fetches a message Chilkat can decrypt.

Background: Credentials are not always packaged together. When the certificate is a standalone .cer and the private key is a separate PEM (or other) file, SetDecryptCert2 takes the two objects individually. It is the two-object counterpart to SetDecryptCert, which expects a single certificate that already carries its private key (such as one loaded from a PFX).

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llSuccess = .F.

//  Demonstrates the MailMan.SetDecryptCert2 method, which explicitly specifies both the
//  certificate and its associated private key (as separate objects) to use when decrypting
//  S/MIME encrypted email.

loMailman = createobject("CkMailMan")

//  Configure the POP3 server connection.
loMailman.MailHost = "pop.example.com"
loMailman.MailPort = 995
loMailman.PopSsl = .T.
loMailman.PopUsername = "user@example.com"
loMailman.PopPassword = "myPassword"

//  Load the certificate (public) and the matching private key from separate files.
loCert = createobject("CkCert")
llSuccess = loCert.LoadFromFile("qa_data/certs/recipient.cer")
if (llSuccess = .F.) then
    ? loCert.LastErrorText
    release loMailman
    release loCert
    return
endif

loPrivKey = createobject("CkPrivateKey")
llSuccess = loPrivKey.LoadPemFile("qa_data/certs/recipient_privkey.pem")
if (llSuccess = .F.) then
    ? loPrivKey.LastErrorText
    release loMailman
    release loCert
    release loPrivKey
    return
endif

//  Specify the certificate and private key to use when decrypting downloaded email.
llSuccess = loMailman.SetDecryptCert2(loCert,loPrivKey)
if (llSuccess = .F.) then
    ? loMailman.LastErrorText
    release loMailman
    release loCert
    release loPrivKey
    return
endif

//  Fetch a message; if it is encrypted, Chilkat decrypts it using the certificate and key.
loEmail = createobject("CkEmail")
llSuccess = loMailman.FetchOne(.F.,0,1,loEmail)
if (llSuccess = .F.) then
    ? loMailman.LastErrorText
    release loMailman
    release loCert
    release loPrivKey
    release loEmail
    return
endif

? "Decrypted = " + str(loEmail.Decrypted)

//  Note: Paths such as "qa_data/..." are relative local filesystem paths,
//  relative to the current working directory of the running application.

//  Note: Explicitly connecting/authenticating is optional.  Chilkat MailMan automatically
//  connects and authenticates -- using the property settings above -- whenever a server
//  operation requires it.  Calling the explicit connect/authenticate methods can still be
//  helpful to determine whether a failure occurs while connecting or while authenticating.


release loMailman
release loCert
release loPrivKey
release loEmail