def sign(self, confirm=False):
url, headers = self.merge_and_headers(self.url)
try:
check_result = self.simple_check(
url,
token=headers.get("X-TOKEN"),
session=self.session,
)
attestation = check_result["attestation"]
errored = set(map(lambda x: x[0], check_result["errors"]))
key_list = check_result["key_list"]
key_hashes = set(map(lambda x: x[0], key_list))
except CheckError as exc:
if not exc.key_list or not exc.errored or not exc.attestation:
raise exc
attestation = exc.attestation
errored = set(map(lambda x: x[0], exc.errored))
key_list = exc.key_list
key_hashes = set(map(lambda x: x[0], key_list))
if self.hash_key_public not in key_hashes:
raise CheckError("Key is not part of chain")
if not confirm:
return (self.hash_key_public in errored, key_list)
# change to update url
postbox_update = merge_get_url(replace_action(self.url, "update/"),
raw="embed",
search="\x1etype=PostBox\x1e")
# retrieve csrftoken
response = self.session.get(postbox_update, headers=headers)
graph = Graph()
graph.parse(data=response.content, format="html")
csrftoken = list(
graph.objects(predicate=spkcgraph["csrftoken"]))[0].toPython()
fields = dict(
map(
lambda x: (x[0].toPython(), x[1].toPython()),
graph.query(
"""
SELECT DISTINCT ?fieldname ?value
WHERE {
?base spkc:fieldname ?fieldname ;
spkc:value ?value .
}
""",
initNs={"spkc": spkcgraph},
)))
fields["signatures"] = []
own_signature = None
for key in self.client_list:
if key[0] != self.hash_key_public:
signature = key[2]
else:
# currently only one priv key is supported
signature = self.priv_key.sign(
attestation,
padding.PSS(mgf=padding.MGF1(self.hash_algo),
salt_length=padding.PSS.MAX_LENGTH),
self.hash_algo)
if signature:
fields["signatures"].append({
"hash":
f"{self.hash_algo.name}={key[0].hex()}",
"signature":
"{}={}".format(self.hash_algo.name,
base64.b64encode(signature).decode("ascii"))
})
if key[0] == self.hash_key_public:
own_signature = fields["signatures"][-1]["signature"]
fields["signatures"] = json.dumps(fields["signatures"])
# update
response = self.session.post(postbox_update,
data=fields,
headers={
"X-CSRFToken": csrftoken,
**headers
})
try:
response.raise_for_status()
graph = Graph()
graph.parse(data=response.content, format="html")
vals = set(extract_property(graph, "signature").values())
breakpoint()
if own_signature not in vals:
raise SrcException("could not update signature", own_signature)
except SrcException as exc:
raise exc
except Exception as exc:
raise SrcException("could not update signature",
own_signature) from exc
return (self.hash_key_public in errored, key_list)
def send(self,
inp,
receivers,
headers=b"\n",
mode=SendMethod.shared,
aes_key=None):
if not self.ok:
raise NotReady()
if isinstance(receivers, str):
receivers = [receivers]
if isinstance(inp, (bytes, memoryview)):
inp = io.BytesIO(bytes(inp))
elif isinstance(inp, str):
inp = io.BytesIO(inp.encode("utf8"))
# 256 bit
if not aes_key:
aes_key = os.urandom(32)
assert len(aes_key) == 32
nonce = os.urandom(13)
fencryptor = Cipher(algorithms.AES(aes_key),
modes.GCM(nonce),
backend=default_backend()).encryptor()
src_key_list = {}
if mode == SendMethod.stealth:
pass
elif mode == SendMethod.private:
enc = self.priv_key.public_key().encrypt(
aes_key,
padding.OAEP(mgf=padding.MGF1(algorithm=self.hash_algo),
algorithm=self.hash_algo,
label=None))
# encrypt decryption key
src_key_list["%s=%s" % (self.hash_algo.name, self.pub_key_hash
)] = base64.b64encode(enc).decode("ascii")
elif mode == SendMethod.shared:
for k in self.client_list:
enc = k[1].encrypt(
aes_key,
padding.OAEP(mgf=padding.MGF1(algorithm=self.hash_algo),
algorithm=self.hash_algo,
label=None))
# encrypt decryption key
src_key_list["%s=%s" %
(self.hash_algo.name, k[0].hex()
)] = base64.b64encode(enc).decode("ascii")
else:
raise NotImplementedError()
# remove raw as we parse html
message_create_url, src_headers = self.merge_and_headers(
replace_action(self.component_url, "add/MessageContent/"),
raw=None)
response = self.session.get(message_create_url, headers=src_headers)
try:
response.raise_for_status()
except Exception as exc:
raise SrcException("retrieval csrftoken failed",
response.text) from exc
g = Graph()
g.parse(data=response.content, format="html")
csrftoken = list(g.objects(predicate=spkcgraph["csrftoken"]))[0]
# create message object
response = self.session.post(
message_create_url,
data={
"own_hash": self.hash_key_public,
"key_list": json.dumps(src_key_list),
"amount_tokens": len(receivers)
},
headers={
"X-CSRFToken": csrftoken,
**src_headers # only for src
},
files={
"encrypted_content": EncryptedFile(fencryptor, inp, nonce,
headers)
})
try:
response.raise_for_status()
except Exception as exc:
raise SrcException("Message creation failed",
response.text) from exc
if message_create_url == response.url:
raise SrcException("Message creation failed", response.text)
g = Graph()
g.parse(data=response.content, format="html")
fetch_url = list(
map(
lambda x: x.value,
g.query("""
SELECT ?value
WHERE {
?property spkc:name ?name ;
spkc:value ?value .
}
""",
initNs={"spkc": spkcgraph},
initBindings={
"name": Literal("fetch_url", datatype=XSD.string)
})))
tokens = list(
map(
lambda x: x.value,
g.query("""
SELECT ?value
WHERE {
?property spkc:name ?name ;
spkc:value ?value .
}
""",
initNs={"spkc": spkcgraph},
initBindings={
"name": Literal("tokens", datatype=XSD.string)
})))
if not fetch_url or not tokens:
raise SrcException("Message creation failed", response.text)
fetch_url = fetch_url[0].toPython()
exceptions = []
final_fetch_urls = []
for receiver, token in zip(receivers, tokens):
furl = merge_get_url(fetch_url, token=token.toPython())
try:
self._send_dest(aes_key, furl, receiver)
final_fetch_urls.append(furl)
except Exception as exc:
exceptions.append(exc)
# for autoremoval simulate access
self.session.get(furl)
return exceptions, final_fetch_urls, aes_key
def receive(self,
message_id,
outfp=None,
access_method=AccessMethod.view,
extra_key_hashes=None,
max_size=None):
if not self.ok:
raise NotReady()
merged_url, headers = self.merge_and_headers(self.url, raw="embed")
response = self.session.get(merge_get_url(self.url, raw="embed"),
headers=headers)
response.raise_for_status()
graph = Graph()
graph.parse(data=response.content, format="turtle")
self.retrieve_missing(graph, merged_url)
result = list(
graph.query(
"""
SELECT DISTINCT ?base ?hash_algorithm ?type
WHERE {
?base a <https://spkcspider.net/static/schemes/spkcgraph#spkc:Content> ;
spkc:type ?type ;
spkc:properties ?propalg , ?propid .
?propid spkc:name ?idname ;
spkc:value ?idvalue .
?propalg spkc:name ?algname ;
spkc:value ?hash_algorithm .
}
""", # noqa E501
initNs={"spkc": spkcgraph},
initBindings={
"idvalue": Literal(message_id),
"algname": Literal("hash_algorithm", datatype=XSD.string),
"idname": Literal("id", datatype=XSD.string),
}))
if not result or result[0].type.toPython() not in {
"WebReference", "MessageContent"
}:
raise SrcException("No Message")
# every object has it's own copy of the hash algorithm, used
hash_algo = getattr(hashes, result[0].hash_algorithm.upper())()
if not outfp:
outfp = tempfile.TempFile()
if hash_algo == self.hash_algo:
pub_key_hashalg = "%s=%s" % (hash_algo.name,
self.hash_key_public.hex())
else:
digest = hashes.Hash(hash_algo, backend=default_backend())
digest.update(self.pem_key_public)
pub_key_hashalg = "%s=%s" % (hash_algo.name,
digest.finalize().hex())
key_hashes = list()
if extra_key_hashes:
extra_key_hashes = set(extra_key_hashes)
extra_key_hashes.discard(pub_key_hashalg)
for key in self.client_list:
if key[0] in extra_key_hashes:
if hash_algo == self.hash_algo:
key_hashalg = "%s=%s" % (hash_algo.name, key[0])
else:
digest = hashes.Hash(hash_algo,
backend=default_backend())
digest.update(key[1])
key_hashalg = "%s=%s" % (hash_algo.name,
digest.finalize().hex())
key_hashes.append(key_hashalg)
if access_method == AccessMethod.view:
key_hashes.append(pub_key_hashalg)
retrieve_url, headers = self.merge_and_headers(
replace_action(
result[0].base, "bypass/" if
(access_method == AccessMethod.bypass) else "message/"))
data = {}
if access_method != AccessMethod.bypass:
data.update({"max_size": max_size or "", "keyhash": key_hashes})
response = self.session.post(retrieve_url,
stream=True,
headers=headers,
data=data)
try:
response.raise_for_status()
except Exception as exc:
raise DestException("Message retrieval failed",
response.text) from exc
key_list = json.loads(response.headers["X-KEYLIST"])
key = key_list.get(pub_key_hashalg, None)
if not key:
raise WrongRecipient("message not for me")
decrypted_key = self.priv_key.decrypt(
base64.b64decode(key),
padding.OAEP(mgf=padding.MGF1(algorithm=hash_algo),
algorithm=hash_algo,
label=None))
headblock = b""
fdecryptor = None
eparser = emailparser.BytesFeedParser(policy=policy.default)
headers = None
for chunk in response.iter_content(chunk_size=256):
blob = None
if not fdecryptor:
headblock = b"%b%b" % (headblock, chunk)
if b"\0" in headblock:
nonce, headblock = headblock.split(b"\0", 1)
nonce = base64.b64decode(nonce)
fdecryptor = Cipher(algorithms.AES(decrypted_key),
modes.GCM(nonce),
backend=default_backend()).decryptor()
blob = fdecryptor.update(headblock[:-16])
headblock = headblock[-16:]
else:
continue
else:
blob = fdecryptor.update(b"%b%b" % (headblock, chunk[:-16]))
headblock = chunk[-16:]
if not headers:
if b"\n\n" not in blob:
eparser.feed(blob)
continue
headersrest, blob = blob.split(b"\n\n", 1)
eparser.feed(headersrest)
headers = eparser.close()
# check what to do
t = headers.get("SPKC-Type", MessageType.email)
if t == MessageType.email:
outfp.write(
headers.as_bytes(unixfrom=True, policy=policy.SMTP))
outfp.write(blob)
outfp.write(fdecryptor.finalize_with_tag(headblock))
return outfp, headers, decrypted_key
def _send_dest(self, aes_key, fetch_url, dest):
dest_url = merge_get_url(dest,
raw="embed",
search="\x1etype=PostBox\x1e")
response_dest = self.session.get(dest_url, timeout=60)
try:
response_dest.raise_for_status()
g_dest = Graph()
g_dest.parse(data=response_dest.content, format="turtle")
self.retrieve_missing(g_dest, dest_url)
except Exception as exc:
raise DestException("postbox retrieval failed") from exc
dest_postboxes = get_postboxes(g_dest)
if len(dest_postboxes) != 1:
raise DestException("No postbox found/more than one found")
dest_postbox_url, dest_options = next(iter(dest_postboxes.items()))
webref_url = replace_action(dest_postbox_url, "push_webref/")
attestation = dest_options["attestation"]
bdomain = dest_postbox_url.split("?", 1)[0]
result_dest, errors, dest_keys = self.attestation_checker.check(
bdomain,
map(lambda x: (x["key"], x["signature"]),
dest_options["signatures"].values()),
attestation=attestation,
algo=dest_options["hash_algorithm"],
auto_add=True)
if result_dest == AttestationResult.domain_unknown:
logger.info("add domain: %s", bdomain)
self.attestation_checker.attestation.add(
bdomain,
dest_keys,
algo=dest_options["hash_algorithm"],
embed=True)
elif result_dest == AttestationResult.error:
if len(dest_keys) == 0:
raise DestException("No keys found")
raise DestSecurityException("dest contains invalid keys", errors)
dest_key_list = {}
for k in dest_keys:
enc = k[1].encrypt(
aes_key,
padding.OAEP(
mgf=padding.MGF1(algorithm=dest_options["hash_algorithm"]),
algorithm=dest_options["hash_algorithm"],
label=None))
# encrypt decryption key
dest_key_list["%s=%s" %
(dest_options["hash_algorithm"].name,
k[0].hex())] = base64.b64encode(enc).decode("ascii")
try:
response_dest = self.session.post(webref_url,
data={
"url":
fetch_url,
"key_list":
json.dumps(dest_key_list)
},
timeout=60)
response_dest.raise_for_status()
except Exception as exc:
raise DestException("post webref failed") from exc
def update_content(self,
inp,
newob,
update_url=None,
x_token=None,
timeout=60,
session=None,
hash_algo=None):
"""
[summary]
Arguments:
inp {url,graph,keys} -- [description]
update_url {[type]} -- [description]
newob {[type]} -- [description]
Keyword Arguments:
x_token {[type]} -- [description] (default: {None})
timeout {int} -- [description] (default: {60})
session {[type]} -- [description] (default: {None})
hash_algo {} -- (default: {None})
"""
if not session:
session = requests.Session()
if isinstance(inp, (list, tuple)):
# be careful to not include thirdparty keys if incompatible
keys = set(inp)
assert hash_algo and update_url
else:
graph, update_url = self.retrieve_missing(
inp, ["\x1etype=PublicKey\x1e"],
x_token=x_token,
timeout=timeout,
session=session)
info = extract_property(graph)
allow_thirdparty = "\x1eunlisted\x1e" not in info
keys, hash_algo = map_keys(graph, hash_algo=hash_algo or None)
if not allow_thirdparty:
keys = filter(lambda x: x["thirdparty"], keys.values())
keys = list(map(lambda x: x["pubkey"], keys))
update_url = replace_action(update_url, "update/")
update_graph = self.retrieve_missing(update_url, [],
x_token=None,
timeout=timeout,
session=session)
csrftoken = list(update_graph.objects(
predicate=spkcgraph["csrftoken"]))[0].toPython()
body = dict(newob["unencrypted"]["values"])
files = dict(newob["unencrypted"]["files"])
nonce = os.urandom(13)
nonce_b64 = base64.b64encode(nonce)
aes_key = newob.get("aes_key") or os.urandom(32)
nonce_name = newob.get("nonce_name")
key_list_name = newob.get("key_list_name", "key_list")
body[nonce_name] = nonce
cipher = Cipher(algorithms.AES(aes_key),
modes.GCM(nonce),
backend=default_backend())
for k, item in newob["encrypted"]["values"].items():
assert nonce_name != k
e = cipher.encryptor()
if not isinstance(item, (list, set, tuple)):
item = [item]
body[k] = []
for el in item:
if isinstance(el, str):
el = el.encode("utf8")
el = e.update(el)
if not nonce_name:
el = b"%s\0%s" % (nonce_b64, el)
body[k].append(el)
for k, item in newob["encrypted"]["files"].items():
assert nonce_name != k
files[k] = EncryptedFile(cipher.encryptor(),
item,
nonce=nonce if nonce_name else None)
body[key_list_name] = {}
for k in keys:
enc = k[1].encrypt(
aes_key,
padding.OAEP(mgf=padding.MGF1(algorithm=hash_algo),
algorithm=hash_algo,
label=None))
# encrypt decryption key
body[key_list_name]["%s=%s" %
(hash_algo.name, k[0].hex()
)] = base64.b64encode(enc).decode("ascii")
body[key_list_name] = json.dumps(body[key_list_name])
# create message object
response = session.post(update_url,
data=body,
headers={
"X-CSRFToken": csrftoken,
},
files=files)
try:
response.raise_for_status()
except Exception as exc:
raise HttpError("Message creation failed", response.text) from exc
def action_send(argv, priv_key, pub_key_hash, src_keys, session, g_src):
postboxes = get_postboxes(g_src)
if len(postboxes) != 1:
parser.exit(1, "Source cannot create messages, logged in?")
component_uriref, src_options = next(postboxes.items())
dest_url = merge_get_url(
argv.dest, raw="embed", search="\x1etype=PostBox\x1e"
)
response_dest = session.get(dest_url)
if not response_dest.ok:
logger.info("Dest returned error: %s", response_dest.text)
parser.exit(1, "retrieval failed, invalid url?\n")
g_dest = Graph()
g_dest.parse(data=response_dest.content, format="turtle")
for page in get_pages(g_dest)[1]:
with session.get(
merge_get_url(dest_url, page=page)
) as response:
response.raise_for_status()
g_dest.parse(data=response.content, format="turtle")
dest_postboxes = get_postboxes(g_dest)
if len(dest_postboxes) != 1:
parser.exit(1, "Dest has no/too many postboxes")
dest_postbox_url, dest_options = next(dest_postboxes.items())
webref_url = replace_action(dest_postbox_url, "push_webref/")
dest_hash_algo = dest_options["hash_algorithm"]
attestation = dest_options["attestation"]
bdomain = dest_postbox_url.split("?", 1)[0]
result_dest, _, dest_keys = argv.attestation.check(
bdomain,
map(
lambda x: (x["key"], x["signature"]),
dest_options["signatures"].values()
), attestation=attestation,
algo=dest_hash_algo
)
if result_dest == AttestationResult.domain_unknown:
logger.info("add domain: %s", bdomain)
argv.attestation.add(
bdomain,
dest_keys,
algo=dest_hash_algo
)
elif result_dest == AttestationResult.error:
logger.critical("Dest base url contains invalid keys.")
parser.exit(1, "dest contains invalid keys\n")
# 256 bit
aes_key = os.urandom(32)
nonce = os.urandom(13)
fencryptor = Cipher(
algorithms.AES(aes_key),
modes.GCM(nonce),
backend=default_backend()
).encryptor()
src_key_list = {}
dest_key_list = {}
if argv.stealth:
pass
elif src_options["shared"]:
for k in src_keys:
enc = k[1].encrypt(
aes_key,
padding.OAEP(
mgf=padding.MGF1(algorithm=argv.src_hash_algo),
algorithm=argv.src_hash_algo, label=None
)
)
# encrypt decryption key
src_key_list[
"%s=%s" % (argv.src_hash_algo.name, k[0].hex())
] = base64.b64encode(enc).decode("ascii")
else:
enc = priv_key.public_key().encrypt(
aes_key,
padding.OAEP(
mgf=padding.MGF1(algorithm=argv.src_hash_algo),
algorithm=argv.src_hash_algo, label=None
)
)
# encrypt decryption key
src_key_list[
"%s=%s" % (argv.src_hash_algo.name, pub_key_hash)
] = base64.b64encode(enc).decode("ascii")
for k in dest_keys:
enc = k[1].encrypt(
aes_key,
padding.OAEP(
mgf=padding.MGF1(algorithm=dest_hash_algo),
algorithm=dest_hash_algo, label=None
)
)
# encrypt decryption key
dest_key_list[
"%s=%s" % (dest_hash_algo.name, k[0].hex())
] = base64.b64encode(enc).decode("ascii")
headers = b"SPKC-Type: %b\n" % MessageType.file
# remove raw as we parse html
message_create_url = merge_get_url(
replace_action(str(component_uriref), "add/MessageContent/"), raw=None
)
response = session.get(
message_create_url, headers={
"X-TOKEN": argv.token
}
)
if not response.ok:
logger.error("retrieval csrftoken failed: %s", response.text)
parser.exit(1, "retrieval csrftoken failed: %s" % response.text)
g = Graph()
g.parse(data=response.content, format="html")
csrftoken = list(g.objects(predicate=spkcgraph["csrftoken"]))[0]
# create message object
response = session.post(
message_create_url, data={
"own_hash": pub_key_hash,
"key_list": json.dumps(src_key_list),
"amount_tokens": 1
}, headers={
"X-CSRFToken": csrftoken,
"X-TOKEN": argv.token # only for src
},
files={
"encrypted_content": EncryptedFile(
fencryptor, argv.file, nonce, headers
)
}
)
if not response.ok or message_create_url == response.url:
logger.error("Message creation failed: %s", response.text)
parser.exit(1, "Message creation failed: %s" % response.text)
g = Graph()
g.parse(data=response.content, format="html")
fetch_url = list(map(lambda x: x.value, g.query(
"""
SELECT ?value
WHERE {
?property spkc:name ?name ;
spkc:value ?value .
}
""",
initNs={"spkc": spkcgraph},
initBindings={
"name": Literal(
"fetch_url", datatype=XSD.string
)
}
)))
tokens = list(map(lambda x: x.value, g.query(
"""
SELECT ?value
WHERE {
?property spkc:name ?name ;
spkc:value ?value .
}
""",
initNs={"spkc": spkcgraph},
initBindings={
"name": Literal(
"tokens", datatype=XSD.string
)
}
)))
if not fetch_url or not tokens:
logger.error("Message creation failed: %s", response.text)
parser.exit(1, "Message creation failed")
# extract url
response_dest = session.post(
webref_url, data={
"url": merge_get_url(fetch_url[0], token=str(tokens[0])),
"key_list": json.dumps(dest_key_list)
}
)
if not response_dest.ok:
logger.error("Sending message failed: %s", response_dest.text)
parser.exit(1, "Sending message failed")
def action_check(argv, priv_key, pub_key_hash, session, g):
src = {}
postbox = None
for i in g.query(
"""
SELECT DISTINCT
?postbox ?key_base ?key_base_prop ?key_name ?key_value
WHERE {
?postbox spkc:properties ?postbox_prop .
?postbox_prop spkc:name ?postbox_prop_name .
?postbox_prop spkc:value ?key_base .
?key_base spkc:properties ?key_base_prop .
?key_base_prop spkc:name ?key_name ;
spkc:value ?key_value .
}
""",
initNs={"spkc": spkcgraph},
initBindings={
"postbox_prop_name": Literal(
"signatures", datatype=XSD.string
)
}
):
postbox = i.postbox
src.setdefault(str(i.key_base), {})
src[str(i.key_base)][str(i.key_name)] = i.key_value
src_activator_value, errored, key_list = argv.attestation.check_signatures(
map(
lambda x: (x["key"], x["signature"]),
src.values()
), algo=argv.src_hash_algo
)
tmp = list(g.query(
"""
SELECT DISTINCT ?value
WHERE {
?base spkc:name ?name .
?base spkc:value ?value .
}
""",
initNs={"spkc": spkcgraph},
initBindings={
"name": Literal(
"attestation", datatype=XSD.string
),
}
))
if tmp[0][0].toPython() != src_activator_value:
return "activator doesn't match shown activator"
if errored:
pub_key_hash_bin = bytes.fromhex(pub_key_hash)
can_fix = set(filter(
lambda x: x == pub_key_hash_bin,
map(lambda x: x[0], errored)
))
if not argv.fix:
if can_fix and postbox:
print("Can fix signature")
else:
if not can_fix or not postbox:
return ", ".join(map(lambda x: x.hex(), errored))
postbox_update = replace_action(
postbox, "update/"
)
# retrieve token
response = session.get(
postbox_update, headers={
"X-TOKEN": argv.token
}
)
g_token = Graph()
g_token.parse(data=response.content, format="html")
csrftoken = list(g_token.objects(
predicate=spkcgraph["csrftoken"])
)[0].toPython()
fields = dict(map(
lambda x: (x[0].toPython(), x[1].toPython()),
g_token.query(
"""
SELECT DISTINCT ?fieldname ?value
WHERE {
?base spkc:fieldname ?fieldname .
?base spkc:value ?value .
}
""",
initNs={"spkc": spkcgraph},
)
))
fields["signatures"] = []
for key in key_list:
if key[0] not in can_fix:
signature = key[2]
else:
# currently only one priv key is supported
signature = priv_key.sign(
src_activator_value,
padding.PSS(
mgf=padding.MGF1(argv.src_hash_algo),
salt_length=padding.PSS.MAX_LENGTH
),
argv.src_hash_algo
)
if signature:
fields["signatures"].append(
{
"hash":
f"{argv.src_hash_algo.name}={key[0].hex()}",
"signature": "{}={}".format(
argv.src_hash_algo.name,
base64.b64encode(
signature
).decode("ascii")
)
}
)
fields["signatures"] = json.dumps(fields["signatures"])
# update
response = session.post(
postbox_update, data=fields, headers={
"X-CSRFToken": csrftoken,
"X-TOKEN": argv.token
}
)
if not response.ok:
logger.error("Repair failed: %s", response.text)
return ", ".join(map(lambda x: x[0].hex(), errored))
logger.info("Repair succeeded")
errored = list(filter(lambda x: x not in can_fix, errored))
if errored == 0:
return True
return ", ".join(map(lambda x: x[0].hex(), errored))
return True
def action_view(argv, priv_key, pem_public, own_url, session, g_message):
if argv.message_id is not None:
assert isinstance(argv.message_id, int)
result = list(g_message.query(
"""
SELECT DISTINCT ?base ?hash_algorithm ?type
WHERE {
?base a <https://spkcspider.net/static/schemes/spkcgraph#spkc:Content> ;
spkc:type ?type ;
spkc:properties ?propalg , ?propid .
?propid spkc:name ?idname ;
spkc:value ?idvalue .
?propalg spkc:name ?algname ;
spkc:value ?hash_algorithm .
}
""", # noqa E501
initNs={"spkc": spkcgraph},
initBindings={
"idvalue": Literal(argv.message_id),
"algname": Literal(
"hash_algorithm", datatype=XSD.string
),
"idname": Literal(
"id", datatype=XSD.string
),
}
))
if not result or result[0].type.toPython() not in {
"WebReference", "MessageContent"
}:
parser.exit(0, "message not found\n")
pub_key_hasher = getattr(
hashes, result[0].hash_algorithm.upper()
)()
digest = hashes.Hash(pub_key_hasher, backend=default_backend())
digest.update(pem_public)
pub_key_hashalg = "%s=%s" % (
pub_key_hasher.name,
digest.finalize().hex()
)
retrieve_url = merge_get_url(
replace_action(
result[0].base, "message/"
)
)
data = {
"max_size": argv.max
}
if argv.action == "view":
data["keyhash"] = pub_key_hashalg
response = session.post(
retrieve_url, stream=True, headers={
"X-TOKEN": argv.token
}, data=data
)
if not response.ok:
logger.info("Message retrieval failed: %s", response.text)
parser.exit(0, "message could not be fetched\n")
key_list = json.loads(response.headers["X-KEYLIST"])
key = key_list.get(pub_key_hashalg, None)
if not key:
parser.exit(0, "message not for me\n")
decrypted_key = priv_key.decrypt(
base64.b64decode(key),
padding.OAEP(
mgf=padding.MGF1(algorithm=argv.src_hash_algo),
algorithm=argv.src_hash_algo,
label=None
)
)
headblock = b""
fdecryptor = None
eparser = emailparser.BytesFeedParser(policy=policy.default)
headers = None
for chunk in response.iter_content(chunk_size=256):
blob = None
if not fdecryptor:
headblock = b"%b%b" % (headblock, chunk)
if b"\0" in headblock:
nonce, headblock = headblock.split(b"\0", 1)
nonce = base64.b64decode(nonce)
fdecryptor = Cipher(
algorithms.AES(decrypted_key),
modes.GCM(nonce),
backend=default_backend()
).decryptor()
blob = fdecryptor.update(headblock[:-16])
headblock = headblock[-16:]
else:
continue
else:
blob = fdecryptor.update(
b"%b%b" % (headblock, chunk[:-16])
)
headblock = chunk[-16:]
if not headers:
if b"\n\n" not in blob:
eparser.feed(blob)
continue
headersrest, blob = blob.split(b"\n\n", 1)
eparser.feed(headersrest)
headers = eparser.close()
# check what to do
t = headers.get("SPKC-Type", MessageType.email)
if t == MessageType.email:
argv.file.write(headers.as_bytes(
unixfrom=True,
policy=policy.SMTP
))
argv.file.write(blob)
argv.file.write(fdecryptor.finalize_with_tag(headblock))
else:
queried_webrefs = {}
queried_messages = {}
for i in g_message.query(
"""
SELECT DISTINCT ?base ?idvalue ?namevalue ?type
WHERE {
?base a <https://spkcspider.net/static/schemes/spkcgraph#spkc:Content> ;
spkc:type ?type ;
spkc:properties ?propname , ?propid .
?propid spkc:name ?idname ;
spkc:value ?idvalue .
?propname spkc:name ?namename ;
spkc:value ?namevalue .
}
""", # noqa E501
initNs={"spkc": spkcgraph},
initBindings={
"idname": Literal(
"id", datatype=XSD.string
),
"namename": Literal(
"name", datatype=XSD.string
),
}
):
if i.type.toPython() == "WebReference":
queried = queried_webrefs
elif i.type.toPython() == "MessageContent":
queried = queried_messages
else:
continue
queried.setdefault(str(i.base), {})
queried[str(i.base)]["id"] = i.idvalue
queried[str(i.base)]["name"] = i.namevalue
print("Received Messages:")
for i in sorted(queried_webrefs.values(), key=lambda x: x["id"]):
print(i["id"], i["name"])
print("Own Messages:")
for i in sorted(queried_messages.values(), key=lambda x: x["id"]):
print(i["id"], i["name"])
