def create_symmetric_decryption_ctx(self, cipher, mode):
if (isinstance(mode, CTR) and isinstance(cipher, AES)
and not self._evp_cipher_supported(cipher, mode)):
# This is needed to provide support for AES CTR mode in OpenSSL
# 0.9.8. It can be removed when we drop 0.9.8 support (RHEL 5
# extended life ends 2020).
return _AESCTRCipherContext(self, cipher, mode)
else:
return _CipherContext(self, cipher, mode, _CipherContext._DECRYPT)
def create_symmetric_decryption_ctx(self, cipher, mode):
if (isinstance(mode, CTR) and isinstance(cipher, AES)
and not self._evp_cipher_supported(cipher, mode)):
# This is needed to provide support for AES CTR mode in OpenSSL
# 0.9.8. It can be removed when we drop 0.9.8 support (RHEL 5
# extended life ends 2020).
return _AESCTRCipherContext(self, cipher, mode)
else:
return _CipherContext(self, cipher, mode, _CipherContext._DECRYPT)
