diff options
Diffstat (limited to 'src/cryptography/hazmat/backends/openssl/ciphers.py')
| -rw-r--r-- | src/cryptography/hazmat/backends/openssl/ciphers.py | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/cryptography/hazmat/backends/openssl/ciphers.py b/src/cryptography/hazmat/backends/openssl/ciphers.py index 462ffea2..e0ee06ee 100644 --- a/src/cryptography/hazmat/backends/openssl/ciphers.py +++ b/src/cryptography/hazmat/backends/openssl/ciphers.py @@ -199,6 +199,11 @@ class _CipherContext(object): "finalize_with_tag requires OpenSSL >= 1.0.2. To use this " "method please update OpenSSL" ) + if len(tag) < self._mode._min_tag_length: + raise ValueError( + "Authentication tag must be {0} bytes or longer.".format( + self._mode._min_tag_length) + ) res = self._backend._lib.EVP_CIPHER_CTX_ctrl( self._ctx, self._backend._lib.EVP_CTRL_AEAD_SET_TAG, len(tag), tag |