(Chilkat2-Python) Example: Mime.GetDecryptCertInfo method

Demonstrates the GetDecryptCertInfo method.

Note: This example requires Chilkat v11.4.0 or greater.

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import sys
import chilkat2

success = False

mime = chilkat2.Mime()

# Load MIME that is has Content-Type like this:
# Content-Type: application/pkcs7-mime; smime-type="enveloped-data"; name="smime.p7m"; smime-type="enveloped-data"
success = mime.LoadMimeFile("qa_data/mime/enveloped_data.eml")
if (success == False):
    print(mime.LastErrorText)
    sys.exit()

# Get information about the certificate that would be needed to decrypt.
# An enveloped-data can potentially be decrypted by multiple certificates if it was encrypted in a way that allows it,
# but in most cases, only a single certificate with associated private key (that of the message recipient) is possible.
json = chilkat2.JsonObject()
success = mime.GetDecryptCertInfo(json)
if (success == False):
    print(mime.LastErrorText)
    sys.exit()

json.EmitCompact = False
print(json.Emit())

# Sample output:

# {
#   "recipientInfo": [
#     {
#       "serial": "****",
#       "issuerCN": "****"
#     }
#   ]
# }

# Get each certificate's information like this:

i = 0
count = json.SizeOfArray("recipientInfo")
while i < count :
    json.I = i
    serial = json.StringOf("recipientInfo[i].serial")
    issuerCN = json.StringOf("recipientInfo[i].issuerCN")
    i = i + 1