Prefix names for all IRCv3 modules with "ircv3_"

1 files changed, 0 insertions, 130 deletions

diff --git a/modules/sasl/scram.py b/modules/sasl/scram.py
deleted file mode 100644
index f243d1e6..00000000
--- a/modules/sasl/scram.py
+++ /dev/null
@@ -1,130 +0,0 @@
-import base64, enum, hashlib, hmac, os, typing
-
-# IANA Hash Function Textual Names
-# https://tools.ietf.org/html/rfc5802#section-4
-# https://www.iana.org/assignments/hash-function-text-names/
-# MD2 has been removed as it's unacceptably weak
-ALGORITHMS = [
-    "MD5", "SHA-1", "SHA-224", "SHA-256", "SHA-384", "SHA-512"]
-
-SCRAM_ERRORS = [
-    "invalid-encoding",
-    "extensions-not-supported", # unrecognized 'm' value
-    "invalid-proof",
-    "channel-bindings-dont-match",
-    "server-does-support-channel-binding",
-    "channel-binding-not-supported",
-    "unsupported-channel-binding-type",
-    "unknown-user",
-    "invalid-username-encoding", # invalid utf8 or bad SASLprep
-    "no-resources"
-]
-
-def _scram_nonce() -> bytes:
-    return base64.b64encode(os.urandom(32))
-def _scram_escape(s: bytes) -> bytes:
-    return s.replace(b"=", b"=3D").replace(b",", b"=2C")
-def _scram_unescape(s: bytes) -> bytes:
-    return s.replace(b"=3D", b"=").replace(b"=2C", b",")
-def _scram_xor(s1: bytes, s2: bytes) -> bytes:
-    return bytes(a ^ b for a, b in zip(s1, s2))
-
-class SCRAMState(enum.Enum):
-    Uninitialised = 0
-    ClientFirst = 1
-    ClientFinal = 2
-    Success = 3
-    Failed = 4
-    VerifyFailed = 5
-
-class SCRAMError(Exception):
-    pass
-
-class SCRAM(object):
-    def __init__(self, algo: str, username: str, password: str):
-        if not algo in ALGORITHMS:
-            raise ValueError("Unknown SCRAM algorithm '%s'" % algo)
-
-        self._algo = algo.replace("-", "") # SHA-1 -> SHA1
-        self._username = username.encode("utf8")
-        self._password = password.encode("utf8")
-
-        self.state = SCRAMState.Uninitialised
-        self.error = ""
-        self.raw_error = ""
-
-        self._client_first = b""
-        self._salted_password = b""
-        self._auth_message = b""
-
-    def _get_pieces(self, data: bytes) -> typing.Dict[bytes, bytes]:
-        pieces = (piece.split(b"=", 1) for piece in data.split(b","))
-        return dict((piece[0], piece[1]) for piece in pieces)
-
-    def _hmac(self, key: bytes, msg: bytes) -> bytes:
-        return hmac.new(key, msg, self._algo).digest()
-    def _hash(self, msg: bytes) -> bytes:
-        return hashlib.new(self._algo, msg).digest()
-
-    def _constant_time_compare(self, b1: bytes, b2: bytes):
-        return hmac.compare_digest(b1, b2)
-
-    def client_first(self) -> bytes:
-        self.state = SCRAMState.ClientFirst
-        self._client_first = b"n=%s,r=%s" % (
-            _scram_escape(self._username), _scram_nonce())
-
-        # n,,n=<username>,r=<nonce>
-        return b"n,,%s" % self._client_first
-
-    def server_first(self, data: bytes) -> bytes:
-        self.state = SCRAMState.ClientFinal
-
-        pieces = self._get_pieces(data)
-        nonce = pieces[b"r"] # server combines your nonce with it's own
-        salt = base64.b64decode(pieces[b"s"]) # salt is b64encoded
-        iterations = int(pieces[b"i"])
-
-        salted_password = hashlib.pbkdf2_hmac(self._algo, self._password,
-            salt, iterations, dklen=None)
-        self._salted_password = salted_password
-
-        client_key = self._hmac(salted_password, b"Client Key")
-        stored_key = self._hash(client_key)
-
-        channel = base64.b64encode(b"n,,")
-        auth_noproof = b"c=%s,r=%s" % (channel, nonce)
-        auth_message = b"%s,%s,%s" % (self._client_first, data, auth_noproof)
-        self._auth_message = auth_message
-
-        client_signature = self._hmac(stored_key, auth_message)
-        client_proof_xor = _scram_xor(client_key, client_signature)
-        client_proof = base64.b64encode(client_proof_xor)
-
-        # c=<b64encode("n,,")>,r=<nonce>,p=<proof>
-        return b"%s,p=%s" % (auth_noproof, client_proof)
-
-    def server_final(self, data: bytes) -> bool:
-        pieces = self._get_pieces(data)
-        if b"e" in pieces:
-            error = pieces[b"e"].decode("utf8")
-            self.raw_error = error
-            if error in SCRAM_ERRORS:
-                self.error = error
-            else:
-                self.error = "other-error"
-
-            self.state = SCRAMState.Failed
-            return False
-
-        verifier = base64.b64decode(pieces[b"v"])
-
-        server_key = self._hmac(self._salted_password, b"Server Key")
-        server_signature = self._hmac(server_key, self._auth_message)
-
-        if server_signature == verifier:
-            self.state = SCRAMState.Success
-            return True
-        else:
-            self.state = SCRAMState.VerifyFailed
-            return False