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Make the random generator of _Rsa and RsaPublic configurable. #93

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Make the random generator of _Rsa and RsaPublic configurable. #93

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10 changes: 6 additions & 4 deletions wolfcrypt/ciphers.py
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Original file line number Diff line number Diff line change
Expand Up @@ -651,13 +651,13 @@ class _Rsa(object): # pylint: disable=too-few-public-methods
_mgf = None
_hash_type = None

def __init__(self):
def __init__(self, rng=Random()):
self.native_object = _ffi.new("RsaKey *")
ret = _lib.wc_InitRsaKey(self.native_object, _ffi.NULL)
if ret < 0: # pragma: no cover
raise WolfCryptError("Invalid key error (%d)" % ret)

self._random = Random()
self._random = rng
if _lib.RSA_BLINDING_ENABLED:
ret = _lib.wc_RsaSetRNG(self.native_object,
self._random.native_object)
Expand Down Expand Up @@ -691,12 +691,14 @@ def _get_mgf(self):


class RsaPublic(_Rsa):
def __init__(self, key=None, hash_type=None):
def __init__(self, key=None, hash_type=None, rng=None):
if key != None:
key = t2b(key)
self._hash_type = hash_type
if rng is None:
rng = Random()

_Rsa.__init__(self)
_Rsa.__init__(self, rng)

idx = _ffi.new("word32*")
idx[0] = 0
Expand Down
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