+ @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)