(Chilkat2-Python) S/MIME Encrypt using Certificate in Apple Keychain

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Encrypts MIME to creates S/MIME using a certificate found in the Apple Keychain.

Chilkat2 Python Downloads install with pip pip3 install chilkat2 or download... Python Module for Windows, Linux, Alpine Linux, MacOS, Solaris

import sys
import chilkat2

cert = chilkat2.Cert()

# Load the certificate by the Subject Common Name
# On MacOS and iOS, Chilkat will search the Keychain(s) for the matching certificate.
success = cert.LoadByCommonName("My Cert")
if (success == False):
    print(cert.LastErrorText)
    sys.exit()

# Note: The private key is not needed for encryption.
# Only the certificate is needed.

# Create a simple MIME message to encrypt.
mime = chilkat2.Mime()
mime.AddHeaderField("Subject","test")
mime.AddHeaderField("SomeHeader","123")
mime.AddHeaderField("Content-Type","text/plain")
mime.SetBody("This is the body.")

print(mime.GetMime())
print("----")

# Here's the MIME to be encrypted:

# Subject: test
# SomeHeader: 123
# Content-Type: text/plain
# 
# This is the body.

# -------------------------------------
# Encrypt the MIME.
success = mime.Encrypt(cert)
if (success == False):
    print(mime.LastErrorText)
    sys.exit()

# Show the encrypted MIME (S/MIME)
print(mime.GetMime())

# Save the encrypted MIME to a file.
mime.SaveMime("./encrypted.mime")

# Here's the S/MIME

# Subject: test
# SomeHeader: 123
# Content-Type: application/x-pkcs7-mime; name="smime.p7m"; smime-type="enveloped-data"
# Content-Disposition: attachment; filename="smime.p7m"
# Content-Transfer-Encoding: base64
# 
# MIICSwYJKoZIhvcNAQcDoIICPDCCAjgCAQAxggGzMIIBrwIBADCBljCBgTELMAkGA1UEBhMCSVQx
# EDAOBgNVBAgMB0JlcmdhbW8xGTAXBgNVBAcMEFBvbnRlIFNhbiBQaWV0cm8xFzAVBgNVBAoMDkFj
# dGFsaXMgUy5wLkEuMSwwKgYDVQQDDCNBY3RhbGlzIENsaWVudCBBdXRoZW50aWNhdGlvbiBDQSBH
# MwIQPCWvkSv8oQ7xRmEHJ6TzEDANBgkqhkiG9w0BAQEFAASCAQB3VZvHRE5EWxug7Sckpcz1ucDZ
# YiTKiqmyPt75MhzNRQLtKFx/jWwlemUwnPMzeu6yutCkZ74Bdn7MBsfDqV3bUz43wAu+fRBteGvF
# mTc00MfY8L7o8dkpj4AqAOCj4hKQzbSE99GvSzyXcPE2Gm5NrOPtKxqfFqbBRTCb4fBZP84LaL+x
# rnYfrM4qXTppixyN8iFYCd4maEbMu/GA5o+j0BkDDnx42pILDoAGV/ERyx55Y3Nc2Mhm/cITBMNn
# g7uS9KPrlYizNaqVu09Hi9jg4gdZaRiTjUqg05tSOk/YqIQxTgfscwSPY92/ewpI6e1EHtLt8Q33
# gWCbERptSntUMHwGCSqGSIb3DQEHATAdBglghkgBZQMEAQIEENm1AxeXlEMx7p6McjHIj5CAUEQj
# 0GuJ5LnTqiqIjOiwmwNidl1N1TRluxX5vAQvwBuYE6bQK4+i04yn2Av3cucW4kvxgP2Nmni+XgQt
# aPPKlasaVceEeZ15IYjw77/m3YYn