python-3.6.zip added from Github

README.cosmo contains the necessary links.

third_party/python/Modules/hashlib.h

@@ -0,0 +1,64 @@
+/* Common code for use by all hashlib related modules. */
+
+/*
+ * Given a PyObject* obj, fill in the Py_buffer* viewp with the result
+ * of PyObject_GetBuffer.  Sets an exception and issues the erraction
+ * on any errors, e.g. 'return NULL' or 'goto error'.
+ */
+#define GET_BUFFER_VIEW_OR_ERROR(obj, viewp, erraction) do { \
+        if (PyUnicode_Check((obj))) { \
+            PyErr_SetString(PyExc_TypeError, \
+                            "Unicode-objects must be encoded before hashing");\
+            erraction; \
+        } \
+        if (!PyObject_CheckBuffer((obj))) { \
+            PyErr_SetString(PyExc_TypeError, \
+                            "object supporting the buffer API required"); \
+            erraction; \
+        } \
+        if (PyObject_GetBuffer((obj), (viewp), PyBUF_SIMPLE) == -1) { \
+            erraction; \
+        } \
+        if ((viewp)->ndim > 1) { \
+            PyErr_SetString(PyExc_BufferError, \
+                            "Buffer must be single dimension"); \
+            PyBuffer_Release((viewp)); \
+            erraction; \
+        } \
+    } while(0)
+
+#define GET_BUFFER_VIEW_OR_ERROUT(obj, viewp) \
+    GET_BUFFER_VIEW_OR_ERROR(obj, viewp, return NULL)
+
+/*
+ * Helper code to synchronize access to the hash object when the GIL is
+ * released around a CPU consuming hashlib operation. All code paths that
+ * access a mutable part of obj must be enclosed in an ENTER_HASHLIB /
+ * LEAVE_HASHLIB block or explicitly acquire and release the lock inside
+ * a PY_BEGIN / END_ALLOW_THREADS block if they wish to release the GIL for
+ * an operation.
+ */
+
+#ifdef WITH_THREAD
+#include "pythread.h"
+    #define ENTER_HASHLIB(obj) \
+        if ((obj)->lock) { \
+            if (!PyThread_acquire_lock((obj)->lock, 0)) { \
+                Py_BEGIN_ALLOW_THREADS \
+                PyThread_acquire_lock((obj)->lock, 1); \
+                Py_END_ALLOW_THREADS \
+            } \
+        }
+    #define LEAVE_HASHLIB(obj) \
+        if ((obj)->lock) { \
+            PyThread_release_lock((obj)->lock); \
+        }
+#else
+    #define ENTER_HASHLIB(obj)
+    #define LEAVE_HASHLIB(obj)
+#endif
+
+/* TODO(gps): We should probably make this a module or EVPobject attribute
+ * to allow the user to optimize based on the platform they're using. */
+#define HASHLIB_GIL_MINSIZE 2048
+