Decrypt S/MIME using a Certificate with Private Key Access

See more MIME Examples

Loads a CMS/PKCS #7 encrypted S/MIME message and decrypts it back to the original MIME content.

DecryptUsingCert takes a single certificate that already has access to its associated private key, for example a certificate loaded from a PFX.

The file paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

import sys
import chilkat

success = False

mime = chilkat.CkMime()
success = mime.LoadMimeFile("qa_data/encrypted.eml")
if (success == False):
    print(mime.lastErrorText())
    sys.exit()

#  Decrypt using a certificate that already provides access to its private key (for example loaded
#  from a PFX).  The only argument is the certificate.
pfxPassword = "myPfxPassword"
cert = chilkat.CkCert()
success = cert.LoadPfxFile("qa_data/recipient.pfx",pfxPassword)
if (success == False):
    print(cert.lastErrorText())
    sys.exit()

success = mime.DecryptUsingCert(cert)
if (success == False):
    print(mime.lastErrorText())
    sys.exit()

body = mime.getBodyDecoded()
if (mime.get_LastMethodSuccess() == False):
    print(mime.lastErrorText())
    sys.exit()

print(body)