X-Git-Url: http://wagner.pp.ru/gitweb/?a=blobdiff_plain;f=ctypescrypto%2Fec.py;fp=ctypescrypto%2Fec.py;h=d325212c7781d196b1d416575436a5e1845005fe;hb=b4ee51a0aca14c0af5853545b9e524cc1b57b656;hp=0000000000000000000000000000000000000000;hpb=bda9492c89eb38a1aec85220294f6d637ad68724;p=oss%2Fctypescrypto.git

diff --git a/ctypescrypto/ec.py b/ctypescrypto/ec.py
new file mode 100644
index 0000000..d325212
--- /dev/null
+++ b/ctypescrypto/ec.py
@@ -0,0 +1,33 @@
+"""
+Support for EC keypair operation missing form public libcrypto API
+"""
+
+
+def create(curve,num):
+	"""
+		Creates EC keypair from the just secret key and curve name
+		
+		@param curve - name of elliptic curve
+		@param num - long number representing key
+	"""
+	p=libcrypto.EVP_PKEY_new()
+	ec=libcrypto.EC_KEY_new_by_curvename(curve.nid)
+	group=libcrypto.EC_KEY_get0_group(ec)
+	EC_KEY_set_private_key(ec,bn)
+	priv_key=libcrypt.BN_new()
+	ctx=BN_CTX_new()
+	h="%x"%(num)
+	libcrypto.BN_hex2bn(byref(priv_key),h)
+	libcrypto.EC_KEY_set_private_key(ec,priv_key)
+	pub_key=libcrypto.EC_POINT_new(group)
+	libcrypto.EC_POINT_mul(group,pub_key,priv_key,None,None,ctx)
+	libcrypto.BN_free(a)
+	libcrypto.EVP_PKEY_set1_EC_KEY(p,ec)
+	libcrypto.EC_KEY_free(ec)
+	return PKey(ptr=p,cansign=True)
+
+
+libcrypto.EVP_PKEY_new.restype=c_void_p
+libcrypto.BN_new.restype=c_void_p
+libcrypto.BN_hex2bn.argtypes(POINTER(c_void_p),c_char_p)
+libcrypto.EC_KEY_set_private_key