diff options
| -rw-r--r-- | cryptography/hazmat/backends/openssl/backend.py | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/cryptography/hazmat/backends/openssl/backend.py b/cryptography/hazmat/backends/openssl/backend.py index d0c6488b..aa6dc83a 100644 --- a/cryptography/hazmat/backends/openssl/backend.py +++ b/cryptography/hazmat/backends/openssl/backend.py @@ -535,9 +535,10 @@ class _HashContext(object): def finalize(self): buf = self._backend._ffi.new("unsigned char[]", self.algorithm.digest_size) - res = self._backend._lib.EVP_DigestFinal_ex(self._ctx, buf, - self._backend._ffi.NULL) + outlen = self._backend._ffi.new("unsigned int *") + res = self._backend._lib.EVP_DigestFinal_ex(self._ctx, buf, outlen) assert res != 0 + assert outlen[0] == self.algorithm.digest_size res = self._backend._lib.EVP_MD_CTX_cleanup(self._ctx) assert res == 1 return self._backend._ffi.buffer(buf)[:] |