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| author | Paul Kehrer <paul.l.kehrer@gmail.com> | 2014-02-28 11:15:03 -0400 |
|---|---|---|
| committer | Paul Kehrer <paul.l.kehrer@gmail.com> | 2014-02-28 11:15:03 -0400 |
| commit | 7df9094221fd7cf2a76dbc21546569322d770072 (patch) | |
| tree | 7208baeaf02f0e7c8cf5e39d10864d28481df17a | |
| parent | 4ef63b64a9517cb4b1e3f4c5b8068e3467378862 (diff) | |
| download | cryptography-7df9094221fd7cf2a76dbc21546569322d770072.tar.gz cryptography-7df9094221fd7cf2a76dbc21546569322d770072.tar.bz2 cryptography-7df9094221fd7cf2a76dbc21546569322d770072.zip | |
be more pedantic in checking the written size of the digest (refs #696)
| -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 c7ae9141..f3febd94 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)[:] |