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
-def create(curve,data):
- """
- Creates EC keypair from the just secret key and curve name
-
- @param curve - name of elliptic curve
- @param num - long number representing key
- """
- ec=libcrypto.EC_KEY_new_by_curve_name(curve.nid)
- if ec is None:
- raise PKeyError("EC_KEY_new_by_curvename")
- group=libcrypto.EC_KEY_get0_group(ec)
- if group is None:
- raise PKeyError("EC_KEY_get0_group")
- libcrypto.EC_GROUP_set_asn1_flag(group,1)
- raw_key=libcrypto.BN_new()
- if raw_key is None:
- raise PKeyError("BN_new")
- ctx=libcrypto.BN_CTX_new()
- if ctx is None:
- raise PKeyError("BN_CTX_new")
- if libcrypto.BN_bin2bn(data,len(data),raw_key) is None:
- raise PKeyError("BN_bin2bn")
- 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:
- raise PKeyError("EC_GROUP_get_order")
- 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:
- raise PKeyError("EC_KEY_set_private_key")
- 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:
- raise PKeyError("EC_POINT_mul")
- if libcrypto.EC_KEY_set_public_key(ec,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:
- raise PKeyError("EVP_PKEY_set1_EC_KEY")
- libcrypto.EC_KEY_free(ec)
- return PKey(ptr=p,cansign=True)
+__all__ = ['create']
+def create(curve, data):
+ """
+ Creates EC keypair from the just secret key and curve name
-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)
-
+ @param curve - name of elliptic curve
+ @param num - byte array or long number representing key
+ """
+ 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_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):
+ 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:
+ raise PKeyError("BN_bin2bn")
+ ctx = libcrypto.BN_CTX_new()
+ if ctx is None:
+ raise PKeyError("BN_CTX_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:
+ raise PKeyError("EC_GROUP_get_order")
+ if libcrypto.BN_nnmod(priv_key, raw_key, order, ctx) <= 0:
+ raise PKeyError("BN_nnmod")
+ 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)
+ if pub_key is None:
+ raise PKeyError("EC_POINT_new")
+ 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_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)
+ 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_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)
projects / oss / ctypescrypto.git / blobdiff