Created
November 21, 2014 19:38
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# -*- coding: utf-8 -*- | |
import re | |
from StringIO import StringIO | |
from subprocess import Popen, PIPE | |
sig_rx = re.compile('(-----BEGIN PGP SIGNATURE-----.+?-----END PGP SIGNATURE-----)', re.DOTALL) | |
def extract_signature(s): | |
match = sig_rx.search(s) | |
if match: | |
return match.group(1) | |
return None | |
enarmor_rx = re.compile(r'-----BEGIN PGP ARMORED FILE-----.*?\n\n(.+?)-----END PGP ARMORED FILE-----', re.DOTALL) | |
def enarmor(sig): | |
args = ['gpg', '--enarmor', '--no-emit-version', '--no-comments'] | |
p = Popen(args, stdin=PIPE, stdout=PIPE, stderr=PIPE) | |
out, err = p.communicate(sig) | |
match = enarmor_rx.search(out.replace('\r\n','\n').replace('\r','\n')) | |
if match: | |
new_sig = match.group(1) | |
m = '-----BEGIN PGP SIGNATURE-----\n\n{0}-----END PGP SIGNATURE-----' | |
return m.format(new_sig) | |
return None | |
def dearmor(sig): | |
args = ['gpg', '--dearmor'] | |
p = Popen(args, stdin=PIPE, stdout=PIPE, stderr=PIPE) | |
out, err = p.communicate(sig) | |
return out | |
def replace_sig(msg, new_sig): | |
new_msg = sig_rx.sub(new_sig, msg) | |
return new_msg | |
def gpgsplit(s): | |
args = ['gpgsplit', '--no-split'] | |
p = Popen(args, stdin=PIPE, stdout=PIPE, stderr=PIPE) | |
out, err = p.communicate(s) | |
return (out,err) | |
def combine(files): | |
bin_sigs = [] | |
for f in files: | |
msg = f.read() | |
sig = extract_signature(msg) | |
if not sig: | |
raise Exception('no signature found') | |
bin_sig = dearmor(sig) | |
if not bin_sig: | |
raise Exception('dearmor failed') | |
bin_sigs.append(bin_sig) | |
combined_sig = enarmor(''.join(bin_sigs)) | |
combined_msg = replace_sig(msg, combined_sig) | |
return combined_msg | |
if __name__ == '__main__': | |
deed1 = open('deed1.asc') | |
deed2 = open('deed2.asc') | |
msg = combine([deed1,deed2]) | |
print msg | |
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