X-Git-Url: https://wagner.pp.ru/gitweb/?a=blobdiff_plain;f=ctypescrypto%2Fec.py;h=b42cfd441c0c41e66db65871647b777bdab74c65;hb=dc3c7b83a9fbf3ae49ec47be6e8e024284b0a91d;hp=7240b39b2e114b10feab3d6c4eee4a38b4cac17f;hpb=954b6dc9e3312f8d8b49f20f8466e6d2a8342f35;p=oss%2Fctypescrypto.git

diff --git a/ctypescrypto/ec.py b/ctypescrypto/ec.py
index 7240b39..b42cfd4 100644
--- a/ctypescrypto/ec.py
+++ b/ctypescrypto/ec.py
@@ -2,78 +2,90 @@
 Support for EC keypair operation missing form public libcrypto API
 """
 from ctypescrypto.pkey import PKey, PKeyError
-from ctypes import c_void_p,c_char_p,c_int,byref
+from ctypes import c_void_p, c_char_p, c_int, byref, POINTER
 from ctypescrypto import libcrypto
 
-__all__ = [ 'create']
+__all__ = ['create']
 
-def create(curve,data):
+def create(curve, data):
     """
-        Creates EC keypair from the just secret key and curve name
-        
-        @param curve - name of elliptic curve
-        @param num - byte array or long number representing key
+    Creates EC keypair from the just secret key and curve name
+
+    @param curve - name of elliptic curve
+    @param num - byte array or long number representing key
     """
-    ec=libcrypto.EC_KEY_new_by_curve_name(curve.nid)
-    if ec is None:  
+    ec_key = libcrypto.EC_KEY_new_by_curve_name(curve.nid)
+    if ec_key is None:
         raise PKeyError("EC_KEY_new_by_curvename")
-    group=libcrypto.EC_KEY_get0_group(ec)
+    group = libcrypto.EC_KEY_get0_group(ec_key)
     if group is None:
         raise PKeyError("EC_KEY_get0_group")
-    libcrypto.EC_GROUP_set_asn1_flag(group,1)
-    raw_key=libcrypto.BN_new()
-    if isinstance(data,int):
-        BN_hex2bn(byref(raw_key),hex(data))
+    libcrypto.EC_GROUP_set_asn1_flag(group, 1)
+    raw_key = libcrypto.BN_new()
+    if isinstance(data, int):
+        libcrypto.BN_hex2bn(byref(raw_key), hex(data))
     else:
         if raw_key is None:
             raise PKeyError("BN_new")
-        if libcrypto.BN_bin2bn(data,len(data),raw_key) is None:
+        if libcrypto.BN_bin2bn(data, len(data), raw_key) is None:
             raise PKeyError("BN_bin2bn")
-    ctx=libcrypto.BN_CTX_new()
+    ctx = libcrypto.BN_CTX_new()
     if ctx is None:
         raise PKeyError("BN_CTX_new")
-    order=libcrypto.BN_new()
+    order = libcrypto.BN_new()
     if order is None:
         raise PKeyError("BN_new")
     priv_key = libcrypto.BN_new()
     if priv_key is None:
         raise PKeyError("BN_new")
-    if libcrypto.EC_GROUP_get_order(group,order,ctx) <=0:
+    if libcrypto.EC_GROUP_get_order(group, order, ctx) <= 0:
         raise PKeyError("EC_GROUP_get_order")
-    if libcrypto.BN_nnmod(priv_key,raw_key,order,ctx) <=0:
+    if libcrypto.BN_nnmod(priv_key, raw_key, order, ctx) <= 0:
         raise PKeyError("BN_nnmod")
-    if libcrypto.EC_KEY_set_private_key(ec,priv_key)<=0:
+    if libcrypto.EC_KEY_set_private_key(ec_key, priv_key) <= 0:
         raise PKeyError("EC_KEY_set_private_key")
-    pub_key=libcrypto.EC_POINT_new(group)
+    pub_key = libcrypto.EC_POINT_new(group)
     if pub_key is None:
         raise PKeyError("EC_POINT_new")
-    if libcrypto.EC_POINT_mul(group,pub_key,priv_key,None,None,ctx)<=0:
+    if libcrypto.EC_POINT_mul(group, pub_key, priv_key, None, None, ctx) <= 0:
         raise PKeyError("EC_POINT_mul")
-    if libcrypto.EC_KEY_set_public_key(ec,pub_key)<=0:
+    if libcrypto.EC_KEY_set_public_key(ec_key, pub_key) <= 0:
         raise PKeyError("EC_KEY_set_public_key")
     libcrypto.BN_free(raw_key)
     libcrypto.BN_free(order)
     libcrypto.BN_free(priv_key)
     libcrypto.BN_CTX_free(ctx)
-    p=libcrypto.EVP_PKEY_new()
-    if p is None:
-        raise PKeyError("EVP_PKEY_new") 
-    if libcrypto.EVP_PKEY_set1_EC_KEY(p,ec)<=0:
+    pkey = libcrypto.EVP_PKEY_new()
+    if pkey is None:
+        raise PKeyError("EVP_PKEY_new")
+    if libcrypto.EVP_PKEY_set1_EC_KEY(pkey, ec_key) <= 0:
         raise PKeyError("EVP_PKEY_set1_EC_KEY")
-    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_free.argtypes=(c_void_p,)
-libcrypto.BN_CTX_new.restype=c_void_p
-libcrypto.BN_CTX_free.argtypes=(c_void_p,)
-libcrypto.BN_bin2bn.argtypes=(c_char_p,c_int,c_void_p)
-libcrypto.EC_KEY_set_private_key.argtypes=(c_void_p,c_void_p)
-libcrypto.EC_POINT_new.argtypes=(c_void_p,)
-libcrypto.EC_POINT_new.restype=c_void_p
-libcrypto.EC_POINT_mul.argtypes=(c_void_p,c_void_p,c_void_p,c_void_p,c_void_p,c_void_p)
-libcrypto.EC_KEY_set_public_key.argtypes=(c_void_p,c_void_p)
-
+    libcrypto.EC_KEY_free(ec_key)
+    return PKey(ptr=pkey, cansign=True)
 
+libcrypto.EVP_PKEY_new.restype = c_void_p
+libcrypto.EC_KEY_new_by_curve_name.restype = c_void_p
+libcrypto.EC_KEY_new_by_curve_name.argtypes = (c_int,)
+libcrypto.BN_new.restype = c_void_p
+libcrypto.BN_free.argtypes = (c_void_p, )
+libcrypto.BN_hex2bn.argtypes = (POINTER(c_void_p), c_char_p)
+libcrypto.BN_bin2bn.argtypes = ( c_char_p, c_int, c_void_p)
+libcrypto.BN_bin2bn.restype = c_void_p
+libcrypto.BN_CTX_new.restype = c_void_p
+libcrypto.BN_CTX_free.argtypes = (c_void_p, )
+libcrypto.BN_bin2bn.argtypes = (c_char_p, c_int, c_void_p)
+libcrypto.BN_nnmod.restype = c_int
+libcrypto.BN_nnmod.argtypes = (c_void_p, c_void_p, c_void_p, c_void_p)
+libcrypto.EC_KEY_set_private_key.argtypes = (c_void_p, c_void_p)
+libcrypto.EC_POINT_new.argtypes = (c_void_p, )
+libcrypto.EC_POINT_new.restype = c_void_p
+libcrypto.EC_POINT_mul.argtypes = (c_void_p, c_void_p, c_void_p, c_void_p,
+                                   c_void_p, c_void_p)
+libcrypto.EC_KEY_set_public_key.argtypes = (c_void_p, c_void_p)
+libcrypto.EC_KEY_get0_group.restype = c_void_p
+libcrypto.EC_KEY_get0_group.argtypes = (c_void_p,)
+libcrypto.EC_KEY_free.argtypes=(c_void_p,)
+libcrypto.EVP_PKEY_set1_EC_KEY.argtypes = (c_void_p, c_void_p)
+libcrypto.EC_GROUP_set_asn1_flag.argtypes = (c_void_p, c_int)
+libcrypto.EC_GROUP_get_order.restype = c_int
+libcrypto.EC_GROUP_get_order.argtypes = (c_void_p, c_void_p, c_void_p)