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[MC-514] Parse dkim, spf and dmarc indicators from Authentication-Results header #7

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[MC-514] Parse dkim, spf and dmarc indicators from Authentication-Results header #7

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76c5189
[MC-514] Parse dkim spf and dmarc indicators from Authentication header
dsliwinski-r7 Oct 4, 2021
c882a39
[MC-514] Update indicators.py
dsliwinski-r7 Jan 7, 2022
97cb621
[MC-514] Add constants
dsliwinski-r7 May 4, 2022
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[MC-514] Add constants
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@dsliwinski-r7
dsliwinski-r7 committed May 4, 2022
commit 97cb621d1e0bb8167a54b06b6e899f9d95826b85
8 changes: 8 additions & 0 deletions eml_parser/constants.py
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Original file line number Diff line number Diff line change
@@ -0,0 +1,8 @@
HEADERS = {
"authentication_results": "Authentication-Results"
}
INDICATORS = {
"dkim": "dkim",
"dmarc": "dmarc",
"spf": "spf"
}
15 changes: 8 additions & 7 deletions eml_parser/indicators.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@
import json

import eml_parser.helper as helper
from eml_parser.constants import HEADERS, INDICATORS


class Indicators(object):
Expand All @@ -12,9 +13,9 @@ def __init__(self, content: str, headers: list):
self.sha256 = hashlib.sha256(encoded_content).hexdigest()

auth_types = self.parse_auth_results_header(headers)
self.dkim = auth_types.get("dkim", None)
self.dmarc = auth_types.get("dmarc", None)
self.spf = auth_types.get("spf", None)
self.dkim = auth_types.get(INDICATORS.get("dkim"), None)
self.dmarc = auth_types.get(INDICATORS.get("dmarc"), None)
self.spf = auth_types.get(INDICATORS.get("spf"), None)

# May not need this
def make_serializable(self) -> dict:
Expand Down Expand Up @@ -54,7 +55,7 @@ def parse_auth_results_header(headers: list) -> dict:
if headers:
for header in headers:
name = header.get("name")
if name == "Authentication-Results":
if name == HEADERS.get("authentication_results"):
value = header.get("value")
break

Expand All @@ -63,10 +64,10 @@ def parse_auth_results_header(headers: list) -> dict:
for auth_type in split_header:
stripped_auth_type = auth_type.strip().replace("\n", "")
if stripped_auth_type.startswith("dkim"):
auth_types["dkim"] = stripped_auth_type
auth_types[INDICATORS.get("dkim")] = stripped_auth_type
elif stripped_auth_type.startswith("dmarc"):
auth_types["dmarc"] = stripped_auth_type
auth_types[INDICATORS.get("dmarc")] = stripped_auth_type
elif stripped_auth_type.startswith("spf"):
auth_types["spf"] = stripped_auth_type
auth_types[INDICATORS.get("spf")] = stripped_auth_type

return auth_types