diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/cryptography/hazmat/backends/openssl/backend.py | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/cryptography/hazmat/backends/openssl/backend.py b/src/cryptography/hazmat/backends/openssl/backend.py index 74dedbe0..ee864137 100644 --- a/src/cryptography/hazmat/backends/openssl/backend.py +++ b/src/cryptography/hazmat/backends/openssl/backend.py @@ -334,7 +334,10 @@ class Backend(object): bin_len = self._lib.BN_bn2bin(bn, bin_ptr) # A zero length means the BN has value 0 self.openssl_assert(bin_len >= 0) - return int.from_bytes(self._ffi.buffer(bin_ptr)[:bin_len], "big") + val = int.from_bytes(self._ffi.buffer(bin_ptr)[:bin_len], "big") + if self._lib.BN_is_negative(bn): + val = -val + return val else: # Under Python 2 the best we can do is hex() hex_cdata = self._lib.BN_bn2hex(bn) |