| Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2011-2015 The Linux Foundation. All rights reserved. |
| 3 | * |
| 4 | * Previously licensed under the ISC license by Qualcomm Atheros, Inc. |
| 5 | * |
| 6 | * |
| 7 | * Permission to use, copy, modify, and/or distribute this software for |
| 8 | * any purpose with or without fee is hereby granted, provided that the |
| 9 | * above copyright notice and this permission notice appear in all |
| 10 | * copies. |
| 11 | * |
| 12 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL |
| 13 | * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED |
| 14 | * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE |
| 15 | * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL |
| 16 | * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR |
| 17 | * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
| 18 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR |
| 19 | * PERFORMANCE OF THIS SOFTWARE. |
| 20 | */ |
| 21 | |
| 22 | /* |
| 23 | * This file was originally distributed by Qualcomm Atheros, Inc. |
| 24 | * under proprietary terms before Copyright ownership was assigned |
| 25 | * to the Linux Foundation. |
| 26 | */ |
| 27 | |
| 28 | /* |
| 29 | * |
| 30 | * This file lim_security_utils.h contains the utility definitions |
| 31 | * related to WEP encryption/decryption etc. |
| 32 | * Author: Chandra Modumudi |
| 33 | * Date: 02/13/02 |
| 34 | * History:- |
| 35 | * Date Modified by Modification Information |
| 36 | * -------------------------------------------------------------------- |
| 37 | */ |
| 38 | #ifndef __LIM_SECURITY_UTILS_H |
| 39 | #define __LIM_SECURITY_UTILS_H |
| 40 | #include "sir_mac_prot_def.h" /* for tSirMacAuthFrameBody */ |
| 41 | |
| 42 | #define LIM_ENCR_AUTH_BODY_LEN (sizeof(tSirMacAuthFrameBody) + \ |
| 43 | SIR_MAC_WEP_IV_LENGTH + \ |
| 44 | SIR_MAC_WEP_ICV_LENGTH) |
| 45 | struct tLimPreAuthNode; |
| 46 | |
| 47 | uint8_t lim_is_auth_algo_supported(tpAniSirGlobal, tAniAuthType, tpPESession); |
| 48 | |
| 49 | /* MAC based authentication related functions */ |
| 50 | void lim_init_pre_auth_list(tpAniSirGlobal); |
| 51 | void lim_delete_pre_auth_list(tpAniSirGlobal); |
| 52 | struct tLimPreAuthNode *lim_search_pre_auth_list(tpAniSirGlobal, tSirMacAddr); |
| 53 | void lim_add_pre_auth_node(tpAniSirGlobal, struct tLimPreAuthNode *); |
| 54 | void lim_delete_pre_auth_node(tpAniSirGlobal, tSirMacAddr); |
| 55 | void lim_release_pre_auth_node(tpAniSirGlobal pMac, tpLimPreAuthNode pAuthNode); |
| 56 | void lim_restore_from_auth_state(tpAniSirGlobal, |
| 57 | tSirResultCodes, uint16_t, tpPESession); |
| 58 | uint8_t lim_delete_open_auth_pre_auth_node(tpAniSirGlobal mac_ctx); |
| 59 | |
| 60 | /* Encryption/Decryption related functions */ |
| 61 | void lim_compute_crc32(uint8_t *, uint8_t *, uint8_t); |
| 62 | void lim_rc4(uint8_t *, uint8_t *, uint8_t *, uint32_t, uint16_t); |
| 63 | void lim_encrypt_auth_frame(tpAniSirGlobal, uint8_t, uint8_t *, uint8_t *, |
| 64 | uint8_t *, uint32_t); |
| 65 | uint8_t lim_decrypt_auth_frame(tpAniSirGlobal, uint8_t *, uint8_t *, uint8_t *, |
| 66 | uint32_t, uint16_t); |
| 67 | |
| 68 | void lim_send_set_bss_key_req(tpAniSirGlobal, tLimMlmSetKeysReq *, tpPESession); |
| 69 | void lim_send_set_sta_key_req(tpAniSirGlobal, tLimMlmSetKeysReq *, uint16_t, uint8_t, |
| 70 | tpPESession, bool sendRsp); |
| 71 | void lim_post_sme_set_keys_cnf(tpAniSirGlobal, tLimMlmSetKeysReq *, |
| 72 | tLimMlmSetKeysCnf *); |
| 73 | |
| 74 | #define PTAPS 0xedb88320 |
| 75 | |
| 76 | static inline uint32_t lim_crc_update(uint32_t crc, uint8_t x) |
| 77 | { |
| 78 | |
| 79 | /* Update CRC computation for 8 bits contained in x */ |
| 80 | /* */ |
| 81 | uint32_t z; |
| 82 | uint32_t fb; |
| 83 | int i; |
| 84 | |
| 85 | z = crc ^ x; |
| 86 | for (i = 0; i < 8; i++) { |
| 87 | fb = z & 1; |
| 88 | z >>= 1; |
| 89 | if (fb) |
| 90 | z ^= PTAPS; |
| 91 | } |
| 92 | return z; |
| 93 | } |
| 94 | |
| 95 | #endif /* __LIM_SECURITY_UTILS_H */ |