(Python) Load Signed and/or Encrypted Email and Unwrap Security Layers

The LoadEml method loads an email (.eml file containing the MIME of an email) and automatically unwraps the digital signature and encryption security layers. A program can then examine the properties of the email object to see what was unwrapped.

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import sys
import chilkat

email = chilkat.CkEmail()

#  Provide PFX/.p12 files for any certs+keys needed for decryption.
#  Signature verification does not need anything extra.
#  (Also, Chilkat will automatically find and use pre-installed certs + private keys needed for decryption
#  on a Windows system.)
success = email.AddPfxSourceFile("/pfxFiles/certs_and_keys_1.pfx","pfxPassword1")
if (success != True):
    print(email.lastErrorText())
    sys.exit()

success = email.AddPfxSourceFile("/pfxFiles/certs_and_keys_2.pfx","pfxPassword2")
if (success != True):
    print(email.lastErrorText())
    sys.exit()

#  ...

#  Load a potentially signed and/or encrypted email.
success = email.LoadEml("someDir/someEmail.eml")

#  If the email was signed and/or encrypted, it was "unwrapped", i.e.
#  the email is already decrypted and in a state as if it were never signed or encrypted.

#  You may check to see if the email was received encrypted or signed, and if so,
#  whether it was successfully unwrapped and who signed or encrypted it:
if (email.get_ReceivedEncrypted() == True):

    print("This email was encrypted.")
    if (email.get_Decrypted() == True):
        print("This email was successfully decrypted.  It was encrypted by:")
        print(email.encryptedBy())
    else:
        print("This email was not decrypted.")

if (email.get_ReceivedSigned() == True):

    print("This email was signed.")
    if (email.get_SignaturesValid() == True):
        print("The signature was verified.  It was signed by:")
        print(email.signedBy())
    else:
        print("The signature verification failed.")

#  At this point, the contents of the email, including attachments, can be accessed normally..