From e0f3cce14cb26d10bc259d431f688fb0d10ab3f5 Mon Sep 17 00:00:00 2001
From: Aldo Cortesi <aldo@nullcube.com>
Date: Thu, 20 Oct 2016 10:38:57 +1300
Subject: netlib.utils.[get,set]bit -> mitmproxy.utils.bits

---
 netlib/tcp.py              |  2 +-
 netlib/utils.py            | 16 ----------------
 netlib/version_check.py    | 43 -------------------------------------------
 netlib/websockets/frame.py | 22 +++++++++++-----------
 4 files changed, 12 insertions(+), 71 deletions(-)
 delete mode 100644 netlib/version_check.py

(limited to 'netlib')

diff --git a/netlib/tcp.py b/netlib/tcp.py
index 4fde657f..4379c9b5 100644
--- a/netlib/tcp.py
+++ b/netlib/tcp.py
@@ -18,7 +18,7 @@ import OpenSSL
 from OpenSSL import SSL
 
 from netlib import certutils
-from netlib import version_check
+from mitmproxy.utils import version_check
 from mitmproxy.types import serializable
 from netlib import exceptions
 from mitmproxy.types import basethread
diff --git a/netlib/utils.py b/netlib/utils.py
index 779eaa27..7b007cb5 100644
--- a/netlib/utils.py
+++ b/netlib/utils.py
@@ -1,21 +1,5 @@
 import re
 
-
-def setbit(byte, offset, value):
-    """
-        Set a bit in a byte to 1 if value is truthy, 0 if not.
-    """
-    if value:
-        return byte | (1 << offset)
-    else:
-        return byte & ~(1 << offset)
-
-
-def getbit(byte, offset):
-    mask = 1 << offset
-    return bool(byte & mask)
-
-
 _label_valid = re.compile(b"(?!-)[A-Z\d-]{1,63}(?<!-)$", re.IGNORECASE)
 
 
diff --git a/netlib/version_check.py b/netlib/version_check.py
deleted file mode 100644
index 547c031c..00000000
--- a/netlib/version_check.py
+++ /dev/null
@@ -1,43 +0,0 @@
-"""
-Having installed a wrong version of pyOpenSSL or netlib is unfortunately a
-very common source of error. Check before every start that both versions
-are somewhat okay.
-"""
-import sys
-import inspect
-import os.path
-
-import OpenSSL
-
-PYOPENSSL_MIN_VERSION = (0, 15)
-
-
-def check_pyopenssl_version(min_version=PYOPENSSL_MIN_VERSION, fp=sys.stderr):
-    min_version_str = u".".join(str(x) for x in min_version)
-    try:
-        v = tuple(int(x) for x in OpenSSL.__version__.split(".")[:2])
-    except ValueError:
-        print(
-            u"Cannot parse pyOpenSSL version: {}"
-            u"mitmproxy requires pyOpenSSL {} or greater.".format(
-                OpenSSL.__version__, min_version_str
-            ),
-            file=fp
-        )
-        return
-    if v < min_version:
-        print(
-            u"You are using an outdated version of pyOpenSSL: "
-            u"mitmproxy requires pyOpenSSL {} or greater.".format(min_version_str),
-            file=fp
-        )
-        # Some users apparently have multiple versions of pyOpenSSL installed.
-        # Report which one we got.
-        pyopenssl_path = os.path.dirname(inspect.getfile(OpenSSL))
-        print(
-            u"Your pyOpenSSL {} installation is located at {}".format(
-                OpenSSL.__version__, pyopenssl_path
-            ),
-            file=fp
-        )
-        sys.exit(1)
diff --git a/netlib/websockets/frame.py b/netlib/websockets/frame.py
index 26303094..bc4ae43a 100644
--- a/netlib/websockets/frame.py
+++ b/netlib/websockets/frame.py
@@ -4,7 +4,7 @@ import io
 
 from netlib import tcp
 from mitmproxy.utils import strutils
-from netlib import utils
+from mitmproxy.utils import bits
 from mitmproxy.utils import human
 from mitmproxy.types import bidi
 from .masker import Masker
@@ -119,13 +119,13 @@ class FrameHeader:
         return "".join(vals)
 
     def __bytes__(self):
-        first_byte = utils.setbit(0, 7, self.fin)
-        first_byte = utils.setbit(first_byte, 6, self.rsv1)
-        first_byte = utils.setbit(first_byte, 5, self.rsv2)
-        first_byte = utils.setbit(first_byte, 4, self.rsv3)
+        first_byte = bits.setbit(0, 7, self.fin)
+        first_byte = bits.setbit(first_byte, 6, self.rsv1)
+        first_byte = bits.setbit(first_byte, 5, self.rsv2)
+        first_byte = bits.setbit(first_byte, 4, self.rsv3)
         first_byte = first_byte | self.opcode
 
-        second_byte = utils.setbit(self.length_code, 7, self.mask)
+        second_byte = bits.setbit(self.length_code, 7, self.mask)
 
         b = bytes([first_byte, second_byte])
 
@@ -152,12 +152,12 @@ class FrameHeader:
           read a websockets frame header
         """
         first_byte, second_byte = fp.safe_read(2)
-        fin = utils.getbit(first_byte, 7)
-        rsv1 = utils.getbit(first_byte, 6)
-        rsv2 = utils.getbit(first_byte, 5)
-        rsv3 = utils.getbit(first_byte, 4)
+        fin = bits.getbit(first_byte, 7)
+        rsv1 = bits.getbit(first_byte, 6)
+        rsv2 = bits.getbit(first_byte, 5)
+        rsv3 = bits.getbit(first_byte, 4)
         opcode = first_byte & 0xF
-        mask_bit = utils.getbit(second_byte, 7)
+        mask_bit = bits.getbit(second_byte, 7)
         length_code = second_byte & 0x7F
 
         # payload_length > 125 indicates you need to read more bytes
-- 
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