(PureBasic) Send Encrypted Email using Certificate in Apple Keychain

See more Apple Keychain Examples

Send encrypted (S/MIME) email using a certificate found in the Apple Keychain.

Note: This example requires Chilkat v10.1.2 or later.

Chilkat PureBasic Module Download Chilkat PureBasic Module

IncludeFile "CkCert.pb"
IncludeFile "CkJsonObject.pb"
IncludeFile "CkSecrets.pb"
IncludeFile "CkEmail.pb"
IncludeFile "CkMailMan.pb"

Procedure ChilkatExample()

    email.i = CkEmail::ckCreate()
    If email.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkEmail::setCkSubject(email, "This email is encrypted")
    CkEmail::setCkBody(email, "This is a S/MIME encrypted mail")
    CkEmail::setCkFrom(email, "Joe <joe@example.com>")

    ; Emails are encrypted using the recipient's certificate.
    recipientEmailAddr.s = "jane@example2.com"
    CkEmail::ckAddTo(email,"",recipientEmailAddr)

    ; Indicate that the email is to be sent encrypted.
    CkEmail::setCkSendEncrypted(email, 1)

    cert.i = CkCert::ckCreate()
    If cert.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    ; -----------------------------------------------
    ; This example requires Chilkat v10.1.2 or later.
    ; -----------------------------------------------

    ; The recipient's certificate is used to encrypt.
    ; This will load the certificate from the Apple Keychain.
    success.i = CkCert::ckLoadByEmailAddress(cert,recipientEmailAddr)
    If success <> 1
        Debug CkCert::ckLastErrorText(cert)
        CkEmail::ckDispose(email)
        CkCert::ckDispose(cert)
        ProcedureReturn
    EndIf

    ; Specify the certificate to be used for encryption.
    success = CkEmail::ckSetEncryptCert(email,cert)
    CkEmail::setCkSendEncrypted(email, 1)

    mailman.i = CkMailMan::ckCreate()
    If mailman.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkMailMan::setCkSmtpHost(mailman, "smtp.example.com")
    CkMailMan::setCkSmtpUsername(mailman, "joe@example.com")
    CkMailMan::setCkSmtpPort(mailman, 587)
    CkMailMan::setCkStartTLS(mailman, 1)

    ; We'll get the SMTP password from the Apple Keychain.
    ; See how we originally saved the email credentials to the Keychain here:
    ; Save Email Credentials in Apple Keychain or Windows Credentials Manager
    secrets.i = CkSecrets::ckCreate()
    If secrets.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    ; On Windows, this is the Windows Credentials Manager
    ; On MacOS/iOS, it is the Apple Keychain
    CkSecrets::setCkLocation(secrets, "local_manager")

    ; Specify the name of the secret.
    ; service and username are required.
    ; appName and domain are optional.
    ; Note: The values are arbitrary and can be anything you want.
    json.i = CkJsonObject::ckCreate()
    If json.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkJsonObject::ckUpdateString(json,"appName","MyEmailApp")
    CkJsonObject::ckUpdateString(json,"service","SMTP")
    CkJsonObject::ckUpdateString(json,"domain","example.com")
    CkJsonObject::ckUpdateString(json,"username","joe@example.com")

    CkMailMan::setCkSmtpPassword(mailman, CkSecrets::ckGetSecretStr(secrets,json))

    ; Send the encrypted email.
    ; The email is encrypted and sent within the SendEmail function.
    success = CkMailMan::ckSendEmail(mailman,email)
    If success <> 1
        Debug CkMailMan::ckLastErrorText(mailman)
        CkEmail::ckDispose(email)
        CkCert::ckDispose(cert)
        CkMailMan::ckDispose(mailman)
        CkSecrets::ckDispose(secrets)
        CkJsonObject::ckDispose(json)
        ProcedureReturn
    EndIf

    Debug "Encrypted email sent!"


    CkEmail::ckDispose(email)
    CkCert::ckDispose(cert)
    CkMailMan::ckDispose(mailman)
    CkSecrets::ckDispose(secrets)
    CkJsonObject::ckDispose(json)


    ProcedureReturn
EndProcedure