Cedric Roux
d7931ea412
The main work of this commit is to rewrite cipher_aes_128_cbc_cmac() which was too slow and created issues when running the 4G eNB on some machines (LLL when using a b210). Instead of creating the security context, use it, and delete it, all in cipher_aes_128_cbc_cmac(), we introduce the function init_aes_128_cbc_cmac() to create it, and we change cipher_aes_128_cbc_cmac() to just use it, and we also adapt free_aes_128_cbc_cmac(). The function aes_128_cbc_cmac() is removed, it does not follow the new init/use/free API. Doing so, on the primary test machine used to do this work (a powerful and fast machine where it is possible to set the CPUs' frequencies) it was possible to limit the CPUs' frequencies to 500 MHz (it was not possible to go lower) without any LLL (using a b210, quectel UE in idle, no data traffic, only periodic measurement reports). Before this commit, it was necessary to set a frequency of at least 1.8 GHz otherwise some LLL would appear. Then we need to adapt the rest of the code to take into account those changes. A notion of security container (stream_security_container_t) containing ciphering and integrity contexts is introduced. And the code is harmonized for, hopefully, better readability. The (opaque) type stream_security_context_t is introduced, used by both integrity and ciphering contexts. The idea is to use a init()/use()/free() API for all the security procedures, identical for all the ciphering and integrity procedures.
33 lines
1.4 KiB
C
33 lines
1.4 KiB
C
/*
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* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The OpenAirInterface Software Alliance licenses this file to You under
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* the OAI Public License, Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.openairinterface.org/?page_id=698
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*-------------------------------------------------------------------------------
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* For more information about the OpenAirInterface (OAI) Software Alliance:
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* contact@openairinterface.org
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*/
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#ifndef OAI_NAS_STREAM_EIA2_H
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#define OAI_NAS_STREAM_EIA2_H
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#include "secu_defs.h"
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void nas_stream_encrypt_eia2(nas_stream_cipher_t const* stream_cipher, uint8_t out[4]);
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stream_security_context_t *stream_integrity_init_eia2(const uint8_t *integrity_key);
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void stream_integrity_free_eia2(stream_security_context_t *integrity_context);
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#endif
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