first try of cythonizing the library

cython/.gitignore

@@ -0,0 +1,2 @@
+build/
+*.c

cython/TrezorCrypto.pyx

@@ -0,0 +1,38 @@
+cimport c
+cimport cython
+
+cdef class HDNode:
+
+	cdef c.HDNode node
+
+	def __init__(self, initializer):
+		if isinstance(initializer, HDNode):
+			self.node = (<HDNode>initializer).node
+		elif isinstance(initializer, str) :
+			if c.hdnode_deserialize(initializer, cython.address(self.node)) != 0:
+				raise Exception('Invalid xpub/xprv provided')
+
+	def xpub(self):
+		cdef char[120] string
+		c.hdnode_serialize_public(cython.address(self.node), string, 120)
+		return str(string)
+
+	def xprv(self):
+		cdef char[120] string
+		c.hdnode_serialize_private(cython.address(self.node), string, 120)
+		return str(string)
+
+	def address(self):
+		cdef char[40] string
+		c.ecdsa_get_address(self.node.public_key, 0, string, 40)
+		return str(string)
+
+	def public_ckd(self, int i):
+		x = HDNode(self)
+		c.hdnode_public_ckd(cython.address(x.node), i)
+		return x
+
+	def private_ckd(self, int i):
+		x = HDNode(self)
+		c.hdnode_private_ckd(cython.address(x.node), i)
+		return x

cython/c.pxd

@@ -0,0 +1,22 @@
+from libc.stdint cimport uint32_t, uint8_t
+
+cdef extern from "../bip32.h":
+
+	ctypedef struct HDNode:
+		uint8_t public_key[33]
+
+	int hdnode_from_seed(const uint8_t *seed, int seed_len, HDNode *out)
+
+	int hdnode_private_ckd(HDNode *inout, uint32_t i)
+
+	int hdnode_public_ckd(HDNode *inout, uint32_t i)
+
+	void hdnode_serialize_public(const HDNode *node, char *str, int strsize)
+
+	void hdnode_serialize_private(const HDNode *node, char *str, int strsize)
+
+	int hdnode_deserialize(const char *str, HDNode *node)
+
+cdef extern from "../ecdsa.h":
+
+	void ecdsa_get_address(const uint8_t *pub_key, uint8_t version, char *addr, int addrsize)

cython/setup.py

@@ -0,0 +1,36 @@
+from distutils.core import setup
+from distutils.extension import Extension
+from Cython.Build import cythonize
+from Cython.Distutils import build_ext
+
+crypto_srcs = [
+	'base58.c',
+	'bignum.c',
+	'bip32.c',
+	'ecdsa.c',
+	'hmac.c',
+	'rand.c',
+	'ripemd160.c',
+	'secp256k1.c',
+	'sha2.c',
+]
+
+crypto_srcs = [ '../%s' % x for x in crypto_srcs ]
+
+extensions = [
+	Extension('TrezorCrypto',
+		sources = ['TrezorCrypto.pyx', 'c.pxd'] + crypto_srcs,
+		extra_compile_args = ['-DUSE_PUBKEY_VALIDATE=0'],
+	)
+]
+
+setup(
+	name = 'TrezorCrypto',
+	version = '0',
+	description = 'Cython wrapper around trezor-crypto library',
+	author = 'Pavol Rusnak',
+	author_email = 'stick@satoshilabs.com',
+	url = 'https://github.com/trezor/trezor-crypto',
+	cmdclass = {'build_ext': build_ext},
+	ext_modules = cythonize(extensions),
+)

cython/test.py

@@ -0,0 +1,10 @@
+#!/usr/bin/python
+from TrezorCrypto import HDNode
+
+x = HDNode('xpub6BcjTvRCYD4VvFQ8whztSXhbNyhS56eTd5P3g9Zvd3zPEeUeL5CUqBYX8NSd1b6Thitr8bZcSnesmXZH7KerMcc4tUkenBShYCtQ1L8ebVe')
+
+y = x.public_ckd(0)
+
+for i in range(1000):
+	z = y.public_ckd(i)
+	print i, z.address()