From f06d2e7219e371ad0d73a9e17f74de381b34caea Mon Sep 17 00:00:00 2001 From: Adrian Amaglio Date: Tue, 18 May 2021 01:25:37 +0200 Subject: [PATCH] spamassassin integration --- server/Dockerfile | 7 +- server/main.py | 19 +- server/spamassassin/readme | 2 + server/spamassassin/spamassasin_client.py | 115 +++++++ server/spamassassin/spamassassin_client | 383 ++++++++++++++++++++++ 5 files changed, 520 insertions(+), 6 deletions(-) create mode 100644 server/spamassassin/readme create mode 100644 server/spamassassin/spamassasin_client.py create mode 100644 server/spamassassin/spamassassin_client diff --git a/server/Dockerfile b/server/Dockerfile index ef5a1e0..66c1e45 100755 --- a/server/Dockerfile +++ b/server/Dockerfile @@ -4,13 +4,16 @@ WORKDIR /usr/src/app COPY requirements.txt ./ RUN pip install --no-cache-dir -r requirements.txt -RUN apk add python3-dev build-base linux-headers pcre-dev +RUN apk add python3-dev build-base linux-headers pcre-dev spamassassin RUN pip install uwsgi +#spamassassin_client ENV UID=0 ENV MOUNT=/ -COPY ./main.py ./ +# Since the package maintainer doesnt merge PR +# https://github.com/petermat/spamassassin_client/pull/2 +COPY ./main.py ./spamassassin/spamassasin_client.py ./ # I juste wanted to change the socket owner but it turned out I needed to change thu uwsgi user #CMD uwsgi --exec-asap 'chown $UID:$UID /tmp/uwsgi/ ; mkdir -p $BASE_PATH && chown $UID:$UID $BASE_PATH' -s /tmp/uwsgi/uwsgi.sock --uid $UID --manage-script-name --mount /=server:app diff --git a/server/main.py b/server/main.py index af2dbc1..6fc2a9f 100755 --- a/server/main.py +++ b/server/main.py @@ -14,6 +14,7 @@ import random, string # for tokens import html # for sanitization from bson.json_util import dumps import datetime # For email date +from spamassasin_client import SpamAssassin ##################################################### Bottle stuff ############################################ @@ -136,7 +137,10 @@ def submission (): content = re.sub(form_regex, r'{\1}', form['content']).format(**content_fields) try: - if not send_mail(from_address, form['mail'], subject, content): + msg = build_mail(from_address, form['mail'], subject, content) + if is_spam(msg): + return resp(400, 'Votre message semble être du spam !') + if not send_mail(form['mail'], msg): return resp(500, 'Le mail n’a pas pu être envoyé.') except smtplib.SMTPDataError as e: response.status = 500 @@ -178,8 +182,7 @@ def fill_fields(request, fields): raise MissingParameterException("Le champs {} est obligatoire".format(field)) return fields -def send_mail (from_address, to, subject, content): - """Actually connect to smtp server, build a message object and send it as a mail""" +def build_mail(from_address, to, subject, content): msg = EmailMessage() msg['From'] = smtp_server_sender msg.add_header('reply-to', from_address) @@ -189,8 +192,16 @@ def send_mail (from_address, to, subject, content): msg.set_content(MIMEText(content, 'plain', "utf-8")) #or #msg.set_content(content) + return msg + +def is_spam(msg): + assassin = SpamAssassin(msg.as_string().encode(), 'spamassassin') + return assassin.is_spam() + +def send_mail (to, msg): + """Actually connect to smtp server and send the mail""" if do_not_send: - print('------------------------------------ Following message wont be sent ------------------------------------') + print('-------------------------- Following message sent. But only to stdout ----------------------------------') print(msg.as_string()) print('--------------------------------------------------------------------------------------------------------') return True diff --git a/server/spamassassin/readme b/server/spamassassin/readme new file mode 100644 index 0000000..1ccbe00 --- /dev/null +++ b/server/spamassassin/readme @@ -0,0 +1,2 @@ +Since the package maintainer doesnt merge PR +https://github.com/petermat/spamassassin_client/pull/2 diff --git a/server/spamassassin/spamassasin_client.py b/server/spamassassin/spamassasin_client.py new file mode 100644 index 0000000..b6d119a --- /dev/null +++ b/server/spamassassin/spamassasin_client.py @@ -0,0 +1,115 @@ +import socket, select, re, logging +from io import BytesIO + +divider_pattern = re.compile(br'^(.*?)\r?\n(.*?)\r?\n\r?\n', re.DOTALL) +first_line_pattern = re.compile(br'^SPAMD/[^ ]+ 0 EX_OK$') + + +class SpamAssassin(object): + def __init__(self, message, host='127.0.0.1', port=783, timeout=20): + self.score = None + self.symbols = None + + # Connecting + client = socket.socket(socket.AF_INET, socket.SOCK_STREAM) + client.settimeout(timeout) + client.connect((host, port)) + + # Sending + client.sendall(self._build_message(message)) + client.shutdown(socket.SHUT_WR) + + # Reading + resfp = BytesIO() + while True: + ready = select.select([client], [], [], timeout) + if ready[0] is None: + # Kill with Timeout! + logging.info('[SpamAssassin] - Timeout ({0}s)!'.format(str(timeout))) + break + + data = client.recv(4096) + if data == b'': + break + + resfp.write(data) + + # Closing + client.close() + client = None + + self._parse_response(resfp.getvalue()) + + def _build_message(self, message): + reqfp = BytesIO() + data_len = str(len(message)).encode() + reqfp.write(b'REPORT SPAMC/1.2\r\n') + reqfp.write(b'Content-Length: ' + data_len + b'\r\n') + reqfp.write(b'User: cx42\r\n\r\n') + reqfp.write(message) + return reqfp.getvalue() + + def _parse_response(self, response): + if response == b'': + logging.info("[SPAM ASSASSIN] Empty response") + return None + + match = divider_pattern.match(response) + if not match: + logging.error("[SPAM ASSASSIN] Response error:") + logging.error(response) + return None + + first_line = match.group(1) + headers = match.group(2) + body = response[match.end(0):] + + # Checking response is good + match = first_line_pattern.match(first_line) + if not match: + logging.error("[SPAM ASSASSIN] invalid response:") + logging.error(first_line) + return None + + report_list = [s.strip() for s in body.decode('utf-8').strip().split('\n')] + linebreak_num = report_list.index([s for s in report_list if "---" in s][0]) + tablelists = [s for s in report_list[linebreak_num + 1:]] + + self.report_fulltext = '\n'.join(report_list) + + + # join line when current one is only wrap of previous + tablelists_temp = [] + if tablelists: + for counter, tablelist in enumerate(tablelists): + if len(tablelist)>1: + if (tablelist[0].isnumeric() or tablelist[0] == '-') and (tablelist[1].isnumeric() or tablelist[1] == '.'): + tablelists_temp.append(tablelist) + else: + if tablelists_temp: + tablelists_temp[-1] += " " + tablelist + tablelists = tablelists_temp + + # create final json + self.report_json = dict() + for tablelist in tablelists: + wordlist = re.split('\s+', tablelist) + self.report_json[wordlist[1]] = {'partscore': float(wordlist[0]), 'description': ' '.join(wordlist[1:])} + + headers = headers.decode('utf-8').replace(' ', '').replace(':', ';').replace('/', ';').split(';') + self.score = float(headers[2]) + + def get_report_json(self): + return self.report_json + + def get_score(self): + return self.score + + def is_spam(self, level=5): + return self.score is None or self.score > level + + def get_fulltext(self): + return self.report_fulltext + + + diff --git a/server/spamassassin/spamassassin_client b/server/spamassassin/spamassassin_client new file mode 100644 index 0000000..a3fdae3 --- /dev/null +++ b/server/spamassassin/spamassassin_client @@ -0,0 +1,383 @@ +%!PS-Adobe-3.0 +%%Creator: (ImageMagick) +%%Title: (spamassassin_client) +%%CreationDate: (2021-05-17T23:08:26+00:00) +%%BoundingBox: 428 345 508 391 +%%HiResBoundingBox: 428 345 508 391 +%%DocumentData: Clean7Bit +%%LanguageLevel: 1 +%%Orientation: Portrait +%%PageOrder: Ascend +%%Pages: 1 +%%EndComments + +%%BeginDefaults +%%EndDefaults + +%%BeginProlog +% +% Display a color image. The image is displayed in color on +% Postscript viewers or printers that support color, otherwise +% it is displayed as grayscale. +% +/DirectClassPacket +{ + % + % Get a DirectClass packet. + % + % Parameters: + % red. + % green. + % blue. + % length: number of pixels minus one of this color (optional). + % + currentfile color_packet readhexstring pop pop + compression 0 eq + { + /number_pixels 3 def + } + { + currentfile byte readhexstring pop 0 get + /number_pixels exch 1 add 3 mul def + } ifelse + 0 3 number_pixels 1 sub + { + pixels exch color_packet putinterval + } for + pixels 0 number_pixels getinterval +} bind def + +/DirectClassImage +{ + % + % Display a DirectClass image. + % + systemdict /colorimage known + { + columns rows 8 + [ + columns 0 0 + rows neg 0 rows + ] + { DirectClassPacket } false 3 colorimage + } + { + % + % No colorimage operator; convert to grayscale. + % + columns rows 8 + [ + columns 0 0 + rows neg 0 rows + ] + { GrayDirectClassPacket } image + } ifelse +} bind def + +/GrayDirectClassPacket +{ + % + % Get a DirectClass packet; convert to grayscale. + % + % Parameters: + % red + % green + % blue + % length: number of pixels minus one of this color (optional). + % + currentfile color_packet readhexstring pop pop + color_packet 0 get 0.299 mul + color_packet 1 get 0.587 mul add + color_packet 2 get 0.114 mul add + cvi + /gray_packet exch def + compression 0 eq + { + /number_pixels 1 def + } + { + currentfile byte readhexstring pop 0 get + /number_pixels exch 1 add def + } ifelse + 0 1 number_pixels 1 sub + { + pixels exch gray_packet put + } for + pixels 0 number_pixels getinterval +} bind def + +/GrayPseudoClassPacket +{ + % + % Get a PseudoClass packet; convert to grayscale. + % + % Parameters: + % index: index into the colormap. + % length: number of pixels minus one of this color (optional). + % + currentfile byte readhexstring pop 0 get + /offset exch 3 mul def + /color_packet colormap offset 3 getinterval def + color_packet 0 get 0.299 mul + color_packet 1 get 0.587 mul add + color_packet 2 get 0.114 mul add + cvi + /gray_packet exch def + compression 0 eq + { + /number_pixels 1 def + } + { + currentfile byte readhexstring pop 0 get + /number_pixels exch 1 add def + } ifelse + 0 1 number_pixels 1 sub + { + pixels exch gray_packet put + } for + pixels 0 number_pixels getinterval +} bind def + +/PseudoClassPacket +{ + % + % Get a PseudoClass packet. + % + % Parameters: + % index: index into the colormap. + % length: number of pixels minus one of this color (optional). + % + currentfile byte readhexstring pop 0 get + /offset exch 3 mul def + /color_packet colormap offset 3 getinterval def + compression 0 eq + { + /number_pixels 3 def + } + { + currentfile byte readhexstring pop 0 get + /number_pixels exch 1 add 3 mul def + } ifelse + 0 3 number_pixels 1 sub + { + pixels exch color_packet putinterval + } for + pixels 0 number_pixels getinterval +} bind def + +/PseudoClassImage +{ + % + % Display a PseudoClass image. + % + % Parameters: + % class: 0-PseudoClass or 1-Grayscale. + % + currentfile buffer readline pop + token pop /class exch def pop + class 0 gt + { + currentfile buffer readline pop + token pop /depth exch def pop + /grays columns 8 add depth sub depth mul 8 idiv string def + columns rows depth + [ + columns 0 0 + rows neg 0 rows + ] + { currentfile grays readhexstring pop } image + } + { + % + % Parameters: + % colors: number of colors in the colormap. + % colormap: red, green, blue color packets. + % + currentfile buffer readline pop + token pop /colors exch def pop + /colors colors 3 mul def + /colormap colors string def + currentfile colormap readhexstring pop pop + systemdict /colorimage known + { + columns rows 8 + [ + columns 0 0 + rows neg 0 rows + ] + { PseudoClassPacket } false 3 colorimage + } + { + % + % No colorimage operator; convert to grayscale. + % + columns rows 8 + [ + columns 0 0 + rows neg 0 rows + ] + { GrayPseudoClassPacket } image + } ifelse + } ifelse +} bind def + +/DisplayImage +{ + % + % Display a DirectClass or PseudoClass image. + % + % Parameters: + % x & y translation. + % x & y scale. + % label pointsize. + % image label. + % image columns & rows. + % class: 0-DirectClass or 1-PseudoClass. + % compression: 0-none or 1-RunlengthEncoded. + % hex color packets. + % + gsave + /buffer 512 string def + /byte 1 string def + /color_packet 3 string def + /pixels 768 string def + + currentfile buffer readline pop + token pop /x exch def + token pop /y exch def pop + x y translate + currentfile buffer readline pop + token pop /x exch def + token pop /y exch def pop + currentfile buffer readline pop + token pop /pointsize exch def pop + x y scale + currentfile buffer readline pop + token pop /columns exch def + token pop /rows exch def pop + currentfile buffer readline pop + token pop /class exch def pop + currentfile buffer readline pop + token pop /compression exch def pop + class 0 gt { PseudoClassImage } { DirectClassImage } ifelse + 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