| /* |
| * Copyright (c) 2013-2016 The Linux Foundation. All rights reserved. |
| * |
| * Previously licensed under the ISC license by Qualcomm Atheros, Inc. |
| * |
| * |
| * Permission to use, copy, modify, and/or distribute this software for |
| * any purpose with or without fee is hereby granted, provided that the |
| * above copyright notice and this permission notice appear in all |
| * copies. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL |
| * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE |
| * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL |
| * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR |
| * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
| * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR |
| * PERFORMANCE OF THIS SOFTWARE. |
| */ |
| |
| /* |
| * This file was originally distributed by Qualcomm Atheros, Inc. |
| * under proprietary terms before Copyright ownership was assigned |
| * to the Linux Foundation. |
| */ |
| |
| /* |
| * |
| * This file lim_utils.cc contains the utility functions |
| * LIM uses. |
| * Author: Chandra Modumudi |
| * Date: 02/13/02 |
| * History:- |
| * Date Modified by Modification Information |
| * -------------------------------------------------------------------- |
| */ |
| |
| #include "ani_global.h" |
| #include "wni_api.h" |
| |
| #include "sir_common.h" |
| #include "wni_cfg.h" |
| #include "cfg_api.h" |
| |
| #include "utils_api.h" |
| #include "lim_utils.h" |
| #include "lim_security_utils.h" |
| #include "lim_ft_defs.h" |
| #include "lim_session.h" |
| |
| #define LIM_SEED_LENGTH 16 |
| /* |
| * preauth node timeout value in interval of 10msec |
| */ |
| #define LIM_OPENAUTH_TIMEOUT 500 |
| |
| /** |
| * lim_is_auth_algo_supported() |
| * |
| ***FUNCTION: |
| * This function is called in various places within LIM code |
| * to determine whether passed authentication algorithm is enabled |
| * or not |
| * |
| ***LOGIC: |
| * |
| ***ASSUMPTIONS: |
| * NA |
| * |
| ***NOTE: |
| * NA |
| * |
| * @param authType Indicates MAC based authentication type |
| * (eSIR_OPEN_SYSTEM or eSIR_SHARED_KEY) |
| * If Shared Key authentication to be used, |
| * 'Privacy Option Implemented' flag is also |
| * checked. |
| * |
| * @return true if passed authType is enabled else false |
| */ |
| uint8_t |
| lim_is_auth_algo_supported(tpAniSirGlobal pMac, tAniAuthType authType, |
| tpPESession psessionEntry) |
| { |
| uint32_t algoEnable, privacyOptImp; |
| |
| if (authType == eSIR_OPEN_SYSTEM) { |
| |
| if (LIM_IS_AP_ROLE(psessionEntry)) { |
| if ((psessionEntry->authType == eSIR_OPEN_SYSTEM) |
| || (psessionEntry->authType == eSIR_AUTO_SWITCH)) |
| return true; |
| else |
| return false; |
| } |
| |
| if (wlan_cfg_get_int(pMac, WNI_CFG_OPEN_SYSTEM_AUTH_ENABLE, |
| &algoEnable) != eSIR_SUCCESS) { |
| /** |
| * Could not get AuthAlgo1 Enable value |
| * from CFG. Log error. |
| */ |
| lim_log(pMac, LOGE, |
| FL("could not retrieve AuthAlgo1 Enable value")); |
| |
| return false; |
| } else |
| return algoEnable > 0 ? true : false; |
| } else { |
| |
| if (LIM_IS_AP_ROLE(psessionEntry)) { |
| if ((psessionEntry->authType == eSIR_SHARED_KEY) |
| || (psessionEntry->authType == eSIR_AUTO_SWITCH)) |
| algoEnable = true; |
| else |
| algoEnable = false; |
| |
| } else |
| |
| if (wlan_cfg_get_int |
| (pMac, WNI_CFG_SHARED_KEY_AUTH_ENABLE, |
| &algoEnable) != eSIR_SUCCESS) { |
| /** |
| * Could not get AuthAlgo2 Enable value |
| * from CFG. Log error. |
| */ |
| lim_log(pMac, LOGE, |
| FL("could not retrieve AuthAlgo2 Enable value")); |
| |
| return false; |
| } |
| |
| if (LIM_IS_AP_ROLE(psessionEntry)) { |
| privacyOptImp = psessionEntry->privacy; |
| } else |
| |
| if (wlan_cfg_get_int(pMac, WNI_CFG_PRIVACY_ENABLED, |
| &privacyOptImp) != eSIR_SUCCESS) { |
| /** |
| * Could not get PrivacyOptionImplemented value |
| * from CFG. Log error. |
| */ |
| lim_log(pMac, LOGE, |
| FL |
| ("could not retrieve PrivacyOptImplemented value")); |
| |
| return false; |
| } |
| return algoEnable && privacyOptImp; |
| } |
| } /****** end lim_is_auth_algo_supported() ******/ |
| |
| /** |
| * lim_init_pre_auth_list |
| * |
| ***FUNCTION: |
| * This function is called while starting a BSS at AP |
| * to initialize MAC authenticated STA list. This may also be called |
| * while joining/starting an IBSS if MAC authentication is allowed |
| * in IBSS mode. |
| * |
| ***LOGIC: |
| * |
| ***ASSUMPTIONS: |
| * |
| ***NOTE: |
| * |
| * @param pMac - Pointer to Global MAC structure |
| * @return None |
| */ |
| |
| void lim_init_pre_auth_list(tpAniSirGlobal pMac) |
| { |
| pMac->lim.pLimPreAuthList = NULL; |
| |
| } /*** end lim_init_pre_auth_list() ***/ |
| |
| /** |
| * lim_delete_pre_auth_list |
| * |
| ***FUNCTION: |
| * This function is called cleanup Pre-auth list either on |
| * AP or on STA when moving from one persona to other. |
| * |
| ***LOGIC: |
| * |
| ***ASSUMPTIONS: |
| * |
| ***NOTE: |
| * |
| * @param pMac - Pointer to Global MAC structure |
| * @return None |
| */ |
| |
| void lim_delete_pre_auth_list(tpAniSirGlobal pMac) |
| { |
| struct tLimPreAuthNode *pCurrNode, *pTempNode; |
| |
| pCurrNode = pTempNode = pMac->lim.pLimPreAuthList; |
| while (pCurrNode != NULL) { |
| pTempNode = pCurrNode->next; |
| |
| PELOG1(lim_log(pMac, LOG1, FL("=====> lim_delete_pre_auth_list "));) |
| lim_release_pre_auth_node(pMac, pCurrNode); |
| |
| pCurrNode = pTempNode; |
| } |
| pMac->lim.pLimPreAuthList = NULL; |
| } /*** end lim_delete_pre_auth_list() ***/ |
| |
| /** |
| * lim_search_pre_auth_list |
| * |
| ***FUNCTION: |
| * This function is called when Authentication frame is received |
| * by AP (or at a STA in IBSS supporting MAC based authentication) |
| * to search if a STA is in the middle of MAC Authentication |
| * transaction sequence. |
| * |
| ***LOGIC: |
| * |
| ***ASSUMPTIONS: |
| * |
| ***NOTE: |
| * |
| * @param macAddr - MAC address of the STA that sent |
| * Authentication frame. |
| * |
| * @return Pointer to pre-auth node if found, else NULL |
| */ |
| |
| struct tLimPreAuthNode *lim_search_pre_auth_list(tpAniSirGlobal pMac, |
| tSirMacAddr macAddr) |
| { |
| struct tLimPreAuthNode *pTempNode = pMac->lim.pLimPreAuthList; |
| |
| while (pTempNode != NULL) { |
| if (!qdf_mem_cmp((uint8_t *) macAddr, |
| (uint8_t *) &pTempNode->peerMacAddr, |
| sizeof(tSirMacAddr))) |
| break; |
| |
| pTempNode = pTempNode->next; |
| } |
| |
| return pTempNode; |
| } /*** end lim_search_pre_auth_list() ***/ |
| |
| /** |
| * lim_delete_open_auth_pre_auth_node() - delete any stale preauth nodes |
| * @mac_ctx: Pointer to Global MAC structure |
| * |
| * This function is called to delete any stale preauth nodes on |
| * receiving authentication frame and existing preauth nodes |
| * reached the maximum allowed limit. |
| * |
| * Return: return true if any preauthnode deleted else false |
| */ |
| uint8_t |
| lim_delete_open_auth_pre_auth_node(tpAniSirGlobal mac_ctx) |
| { |
| struct tLimPreAuthNode *prev_node, *temp_node, *found_node; |
| uint8_t auth_node_freed = false; |
| |
| temp_node = prev_node = mac_ctx->lim.pLimPreAuthList; |
| |
| if (temp_node == NULL) |
| return auth_node_freed; |
| |
| while (temp_node != NULL) { |
| if (temp_node->mlmState == eLIM_MLM_AUTHENTICATED_STATE && |
| temp_node->authType == eSIR_OPEN_SYSTEM && |
| (qdf_mc_timer_get_system_ticks() > |
| (LIM_OPENAUTH_TIMEOUT + temp_node->timestamp) || |
| qdf_mc_timer_get_system_ticks() < temp_node->timestamp)) { |
| /* Found node to be deleted */ |
| auth_node_freed = true; |
| found_node = temp_node; |
| if (mac_ctx->lim.pLimPreAuthList == temp_node) { |
| prev_node = mac_ctx->lim.pLimPreAuthList = |
| temp_node = found_node->next; |
| } else { |
| prev_node->next = temp_node->next; |
| temp_node = prev_node->next; |
| } |
| |
| lim_release_pre_auth_node(mac_ctx, found_node); |
| } else { |
| prev_node = temp_node; |
| temp_node = prev_node->next; |
| } |
| } |
| |
| return auth_node_freed; |
| } |
| |
| /** |
| * lim_add_pre_auth_node |
| * |
| ***FUNCTION: |
| * This function is called at AP while sending Authentication |
| * frame2. |
| * This may also be called on a STA in IBSS if MAC authentication is |
| * allowed in IBSS mode. |
| * |
| ***LOGIC: |
| * Node is always added to the front of the list |
| * |
| ***ASSUMPTIONS: |
| * |
| ***NOTE: |
| * |
| * @param pMac - Pointer to Global MAC structure |
| * @param pAuthNode - Pointer to pre-auth node to be added to the list. |
| * |
| * @return None |
| */ |
| |
| void lim_add_pre_auth_node(tpAniSirGlobal pMac, struct tLimPreAuthNode *pAuthNode) |
| { |
| pMac->lim.gLimNumPreAuthContexts++; |
| |
| pAuthNode->next = pMac->lim.pLimPreAuthList; |
| |
| pMac->lim.pLimPreAuthList = pAuthNode; |
| } /*** end lim_add_pre_auth_node() ***/ |
| |
| /** |
| * lim_release_pre_auth_node |
| * |
| ***FUNCTION: |
| * This function is called to realease the accquired |
| * pre auth node from list. |
| * |
| ***LOGIC: |
| * |
| ***ASSUMPTIONS: |
| * |
| ***NOTE: |
| * |
| * @param pMac - Pointer to Global MAC structure |
| * @param pAuthNode - Pointer to Pre Auth node to be released |
| * @return None |
| */ |
| |
| void lim_release_pre_auth_node(tpAniSirGlobal pMac, tpLimPreAuthNode pAuthNode) |
| { |
| pAuthNode->fFree = 1; |
| MTRACE(mac_trace |
| (pMac, TRACE_CODE_TIMER_DEACTIVATE, NO_SESSION, |
| eLIM_PRE_AUTH_CLEANUP_TIMER)); |
| tx_timer_deactivate(&pAuthNode->timer); |
| pMac->lim.gLimNumPreAuthContexts--; |
| } /*** end lim_release_pre_auth_node() ***/ |
| |
| /** |
| * lim_delete_pre_auth_node |
| * |
| ***FUNCTION: |
| * This function is called at AP when a pre-authenticated STA is |
| * Associated/Reassociated or when AuthFrame4 is received after |
| * Auth Response timeout. |
| * This may also be called on a STA in IBSS if MAC authentication and |
| * Association/Reassociation is allowed in IBSS mode. |
| * |
| ***LOGIC: |
| * |
| ***ASSUMPTIONS: |
| * |
| ***NOTE: |
| * |
| * @param pMac - Pointer to Global MAC structure |
| * @param peerMacAddr - MAC address of the STA that need to be deleted |
| * from pre-auth node list. |
| * |
| * @return None |
| */ |
| |
| void lim_delete_pre_auth_node(tpAniSirGlobal pMac, tSirMacAddr macAddr) |
| { |
| struct tLimPreAuthNode *pPrevNode, *pTempNode; |
| |
| pTempNode = pPrevNode = pMac->lim.pLimPreAuthList; |
| |
| if (pTempNode == NULL) |
| return; |
| |
| if (!qdf_mem_cmp((uint8_t *) macAddr, |
| (uint8_t *) &pTempNode->peerMacAddr, |
| sizeof(tSirMacAddr))) { |
| /* First node to be deleted */ |
| |
| pMac->lim.pLimPreAuthList = pTempNode->next; |
| |
| PELOG1(lim_log |
| (pMac, LOG1, |
| FL |
| ("=====> lim_delete_pre_auth_node : first node to delete")); |
| ) |
| PELOG1(lim_log |
| (pMac, LOG1, |
| FL("Release data entry: %x id %d peer "), pTempNode, |
| pTempNode->authNodeIdx); |
| lim_print_mac_addr(pMac, macAddr, LOG1); |
| ) |
| lim_release_pre_auth_node(pMac, pTempNode); |
| |
| return; |
| } |
| |
| pTempNode = pTempNode->next; |
| |
| while (pTempNode != NULL) { |
| if (!qdf_mem_cmp((uint8_t *) macAddr, |
| (uint8_t *) &pTempNode->peerMacAddr, |
| sizeof(tSirMacAddr))) { |
| /* Found node to be deleted */ |
| |
| pPrevNode->next = pTempNode->next; |
| |
| PELOG1(lim_log |
| (pMac, LOG1, |
| FL |
| ("=====> lim_delete_pre_auth_node : subsequent node to delete")); |
| lim_log(pMac, LOG1, |
| FL("Release data entry: %x id %d peer "), |
| pTempNode, pTempNode->authNodeIdx); |
| lim_print_mac_addr(pMac, macAddr, LOG1); |
| ) |
| lim_release_pre_auth_node(pMac, pTempNode); |
| |
| return; |
| } |
| |
| pPrevNode = pTempNode; |
| pTempNode = pTempNode->next; |
| } |
| |
| /* Should not be here */ |
| /* Log error */ |
| lim_log(pMac, LOGP, FL("peer not found in pre-auth list, addr= ")); |
| lim_print_mac_addr(pMac, macAddr, LOGP); |
| |
| } /*** end lim_delete_pre_auth_node() ***/ |
| |
| /** |
| * limRestoreFromPreAuthState |
| * |
| ***FUNCTION: |
| * This function is called on STA whenever an Authentication |
| * sequence is complete and state prior to auth need to be |
| * restored. |
| * |
| ***LOGIC: |
| * MLM_AUTH_CNF is prepared and sent to SME state machine. |
| * In case of restoring from pre-auth: |
| * - Channel Id is programmed at LO/RF synthesizer |
| * - BSSID is programmed at RHP |
| * |
| ***ASSUMPTIONS: |
| * |
| ***NOTE: |
| * |
| * @param pMac - Pointer to Global MAC structure |
| * @param resultCode - result of authentication attempt |
| * @return None |
| */ |
| |
| void |
| lim_restore_from_auth_state(tpAniSirGlobal pMac, tSirResultCodes resultCode, |
| uint16_t protStatusCode, tpPESession sessionEntry) |
| { |
| tSirMacAddr currentBssId; |
| tLimMlmAuthCnf mlmAuthCnf; |
| |
| #ifdef FEATURE_WLAN_DIAG_SUPPORT |
| lim_diag_event_report(pMac, WLAN_PE_DIAG_AUTH_COMP_EVENT, sessionEntry, |
| resultCode, protStatusCode); |
| #endif |
| |
| qdf_mem_copy((uint8_t *) &mlmAuthCnf.peerMacAddr, |
| (uint8_t *) &pMac->lim.gpLimMlmAuthReq->peerMacAddr, |
| sizeof(tSirMacAddr)); |
| mlmAuthCnf.authType = pMac->lim.gpLimMlmAuthReq->authType; |
| mlmAuthCnf.resultCode = resultCode; |
| mlmAuthCnf.protStatusCode = protStatusCode; |
| |
| /* Update PE session ID */ |
| mlmAuthCnf.sessionId = sessionEntry->peSessionId; |
| |
| /* / Free up buffer allocated */ |
| /* / for pMac->lim.gLimMlmAuthReq */ |
| qdf_mem_free(pMac->lim.gpLimMlmAuthReq); |
| pMac->lim.gpLimMlmAuthReq = NULL; |
| |
| sessionEntry->limMlmState = sessionEntry->limPrevMlmState; |
| |
| MTRACE(mac_trace |
| (pMac, TRACE_CODE_MLM_STATE, sessionEntry->peSessionId, |
| sessionEntry->limMlmState)); |
| |
| /* |
| * Set the auth_ack_status status flag as success as |
| * host have received the auth rsp and no longer auth |
| * retry is needed also cancel the auth rety timer |
| */ |
| pMac->auth_ack_status = LIM_AUTH_ACK_RCD_SUCCESS; |
| /* 'Change' timer for future activations */ |
| lim_deactivate_and_change_timer(pMac, eLIM_AUTH_RETRY_TIMER); |
| |
| /* 'Change' timer for future activations */ |
| lim_deactivate_and_change_timer(pMac, eLIM_AUTH_FAIL_TIMER); |
| |
| sir_copy_mac_addr(currentBssId, sessionEntry->bssId); |
| |
| if (sessionEntry->limSmeState == eLIM_SME_WT_PRE_AUTH_STATE) { |
| pMac->lim.gLimPreAuthChannelNumber = 0; |
| } |
| |
| lim_post_sme_message(pMac, LIM_MLM_AUTH_CNF, (uint32_t *) &mlmAuthCnf); |
| } /*** end lim_restore_from_auth_state() ***/ |
| |
| /** |
| * lim_encrypt_auth_frame() |
| * |
| ***FUNCTION: |
| * This function is called in lim_process_auth_frame() function |
| * to encrypt Authentication frame3 body. |
| * |
| ***LOGIC: |
| * |
| ***ASSUMPTIONS: |
| * NA |
| * |
| ***NOTE: |
| * NA |
| * |
| * @param pMac Pointer to Global MAC structure |
| * @param keyId key id to used |
| * @param pKey Pointer to the key to be used for encryption |
| * @param pPlainText Pointer to the body to be encrypted |
| * @param pEncrBody Pointer to the encrypted auth frame body |
| * @param keyLength 8 (WEP40) or 16 (WEP104) |
| * @return None |
| */ |
| |
| void |
| lim_encrypt_auth_frame(tpAniSirGlobal pMac, uint8_t keyId, uint8_t *pKey, |
| uint8_t *pPlainText, uint8_t *pEncrBody, |
| uint32_t keyLength) |
| { |
| uint8_t seed[LIM_SEED_LENGTH], icv[SIR_MAC_WEP_ICV_LENGTH]; |
| |
| keyLength += 3; |
| |
| /* Bytes 3-7 of seed is key */ |
| qdf_mem_copy((uint8_t *) &seed[3], pKey, keyLength - 3); |
| |
| /* Compute CRC-32 and place them in last 4 bytes of plain text */ |
| lim_compute_crc32(icv, pPlainText, sizeof(tSirMacAuthFrameBody)); |
| |
| qdf_mem_copy(pPlainText + sizeof(tSirMacAuthFrameBody), |
| icv, SIR_MAC_WEP_ICV_LENGTH); |
| |
| /* Run RC4 on plain text with the seed */ |
| lim_rc4(pEncrBody + SIR_MAC_WEP_IV_LENGTH, |
| (uint8_t *) pPlainText, seed, keyLength, |
| LIM_ENCR_AUTH_BODY_LEN - SIR_MAC_WEP_IV_LENGTH); |
| |
| /* Prepare IV */ |
| pEncrBody[0] = seed[0]; |
| pEncrBody[1] = seed[1]; |
| pEncrBody[2] = seed[2]; |
| pEncrBody[3] = keyId << 6; |
| } /****** end lim_encrypt_auth_frame() ******/ |
| |
| /** |
| * lim_compute_crc32() |
| * |
| ***FUNCTION: |
| * This function is called to compute CRC-32 on a given source. |
| * Used while encrypting/decrypting Authentication frame 3. |
| * |
| ***LOGIC: |
| * |
| ***ASSUMPTIONS: |
| * NA |
| * |
| ***NOTE: |
| * NA |
| * |
| * @param pDest Destination location for computed CRC |
| * @param pSrc Source location to be CRC computed |
| * @param len Length over which CRC to be computed |
| * @return None |
| */ |
| |
| void lim_compute_crc32(uint8_t *pDest, uint8_t *pSrc, uint8_t len) |
| { |
| uint32_t crc; |
| int i; |
| |
| crc = 0; |
| crc = ~crc; |
| |
| while (len-- > 0) |
| crc = lim_crc_update(crc, *pSrc++); |
| |
| crc = ~crc; |
| |
| for (i = 0; i < SIR_MAC_WEP_IV_LENGTH; i++) { |
| pDest[i] = (uint8_t) crc; |
| crc >>= 8; |
| } |
| } /****** end lim_compute_crc32() ******/ |
| |
| /** |
| * lim_rc4() |
| * |
| ***FUNCTION: |
| * This function is called to run RC4 algorithm. Called while |
| * encrypting/decrypting Authentication frame 3. |
| * |
| ***LOGIC: |
| * |
| ***ASSUMPTIONS: |
| * NA |
| * |
| ***NOTE: |
| * NA |
| * |
| * @param pDest Destination location for encrypted text |
| * @param pSrc Source location to be encrypted |
| * @param seed Contains seed (IV + key) for PRNG |
| * @param keyLength 8 (WEP40) or 16 (WEP104) |
| * @param frameLen Length of the frame |
| * |
| * @return None |
| */ |
| |
| void |
| lim_rc4(uint8_t *pDest, uint8_t *pSrc, uint8_t *seed, uint32_t keyLength, |
| uint16_t frameLen) |
| { |
| typedef struct { |
| uint8_t i, j; |
| uint8_t sbox[256]; |
| } tRC4Context; |
| |
| tRC4Context ctx; |
| |
| { |
| uint16_t i, j, k; |
| |
| /* */ |
| /* Initialize sbox using seed */ |
| /* */ |
| |
| ctx.i = ctx.j = 0; |
| for (i = 0; i < 256; i++) |
| ctx.sbox[i] = (uint8_t) i; |
| |
| j = 0; |
| k = 0; |
| for (i = 0; i < 256; i++) { |
| uint8_t temp; |
| if (k < LIM_SEED_LENGTH) |
| j = (uint8_t) (j + ctx.sbox[i] + seed[k]); |
| temp = ctx.sbox[i]; |
| ctx.sbox[i] = ctx.sbox[j]; |
| ctx.sbox[j] = temp; |
| |
| if (++k >= keyLength) |
| k = 0; |
| } |
| } |
| |
| { |
| uint8_t i = ctx.i; |
| uint8_t j = ctx.j; |
| uint8_t len = (uint8_t) frameLen; |
| |
| while (len-- > 0) { |
| uint8_t temp1, temp2; |
| |
| i = (uint8_t) (i + 1); |
| temp1 = ctx.sbox[i]; |
| j = (uint8_t) (j + temp1); |
| |
| ctx.sbox[i] = temp2 = ctx.sbox[j]; |
| ctx.sbox[j] = temp1; |
| |
| temp1 = (uint8_t) (temp1 + temp2); |
| temp1 = ctx.sbox[temp1]; |
| temp2 = (uint8_t) (pSrc ? *pSrc++ : 0); |
| |
| *pDest++ = (uint8_t) (temp1 ^ temp2); |
| } |
| |
| ctx.i = i; |
| ctx.j = j; |
| } |
| } /****** end lim_rc4() ******/ |
| |
| /** |
| * lim_decrypt_auth_frame() |
| * |
| ***FUNCTION: |
| * This function is called in lim_process_auth_frame() function |
| * to decrypt received Authentication frame3 body. |
| * |
| ***LOGIC: |
| * |
| ***ASSUMPTIONS: |
| * NA |
| * |
| ***NOTE: |
| * NA |
| * |
| * @param pMac Pointer to Global MAC structure |
| * @param pKey Pointer to the key to be used for decryption |
| * @param pEncrBody Pointer to the body to be decrypted |
| * @param pPlainBody Pointer to the decrypted body |
| * @param keyLength 8 (WEP40) or 16 (WEP104) |
| * |
| * @return Decrypt result - eSIR_SUCCESS for success and |
| * LIM_DECRYPT_ICV_FAIL for ICV mismatch. |
| * If decryption is a success, pBody will |
| * have decrypted auth frame body. |
| */ |
| |
| uint8_t |
| lim_decrypt_auth_frame(tpAniSirGlobal pMac, uint8_t *pKey, uint8_t *pEncrBody, |
| uint8_t *pPlainBody, uint32_t keyLength, uint16_t frameLen) |
| { |
| uint8_t seed[LIM_SEED_LENGTH], icv[SIR_MAC_WEP_ICV_LENGTH]; |
| int i; |
| keyLength += 3; |
| |
| /* Bytes 0-2 of seed is received IV */ |
| qdf_mem_copy((uint8_t *) seed, pEncrBody, SIR_MAC_WEP_IV_LENGTH - 1); |
| |
| /* Bytes 3-7 of seed is key */ |
| qdf_mem_copy((uint8_t *) &seed[3], pKey, keyLength - 3); |
| |
| /* Run RC4 on encrypted text with the seed */ |
| lim_rc4(pPlainBody, |
| pEncrBody + SIR_MAC_WEP_IV_LENGTH, seed, keyLength, frameLen); |
| |
| PELOG4(lim_log(pMac, LOG4, FL("plainbody is ")); |
| sir_dump_buf(pMac, SIR_LIM_MODULE_ID, LOG4, pPlainBody, frameLen); |
| ) |
| /* Compute CRC-32 and place them in last 4 bytes of encrypted body */ |
| lim_compute_crc32(icv, |
| (uint8_t *) pPlainBody, |
| (uint8_t) (frameLen - SIR_MAC_WEP_ICV_LENGTH)); |
| |
| /* Compare RX_ICV with computed ICV */ |
| for (i = 0; i < SIR_MAC_WEP_ICV_LENGTH; i++) { |
| PELOG4(lim_log |
| (pMac, LOG4, FL(" computed ICV%d[%x], rxed ICV%d[%x]"), |
| i, icv[i], i, |
| pPlainBody[frameLen - SIR_MAC_WEP_ICV_LENGTH + i]); |
| ) |
| if (icv[i] != |
| pPlainBody[frameLen - SIR_MAC_WEP_ICV_LENGTH + i]) |
| return LIM_DECRYPT_ICV_FAIL; |
| } |
| |
| return eSIR_SUCCESS; |
| } /****** end lim_decrypt_auth_frame() ******/ |
| |
| /** |
| * lim_post_sme_set_keys_cnf |
| * |
| * A utility API to send MLM_SETKEYS_CNF to SME |
| */ |
| void lim_post_sme_set_keys_cnf(tpAniSirGlobal pMac, |
| tLimMlmSetKeysReq *pMlmSetKeysReq, |
| tLimMlmSetKeysCnf *mlmSetKeysCnf) |
| { |
| /* Prepare and Send LIM_MLM_SETKEYS_CNF */ |
| qdf_copy_macaddr(&mlmSetKeysCnf->peer_macaddr, |
| &pMlmSetKeysReq->peer_macaddr); |
| |
| /* Free up buffer allocated for mlmSetKeysReq */ |
| qdf_mem_free(pMlmSetKeysReq); |
| pMac->lim.gpLimMlmSetKeysReq = NULL; |
| |
| lim_post_sme_message(pMac, |
| LIM_MLM_SETKEYS_CNF, (uint32_t *) mlmSetKeysCnf); |
| } |
| |
| /** |
| * lim_send_set_bss_key_req() |
| * |
| ***FUNCTION: |
| * This function is called from lim_process_mlm_set_keys_req(), |
| * when PE is trying to setup the Group Keys related |
| * to a specified encryption type |
| * |
| ***LOGIC: |
| * |
| ***ASSUMPTIONS: |
| * NA |
| * |
| ***NOTE: |
| * NA |
| * |
| * @param pMac Pointer to Global MAC structure |
| * @param pMlmSetKeysReq Pointer to MLM_SETKEYS_REQ buffer |
| * @return none |
| */ |
| void lim_send_set_bss_key_req(tpAniSirGlobal pMac, |
| tLimMlmSetKeysReq *pMlmSetKeysReq, |
| tpPESession psessionEntry) |
| { |
| tSirMsgQ msgQ; |
| tpSetBssKeyParams pSetBssKeyParams = NULL; |
| tLimMlmSetKeysCnf mlmSetKeysCnf; |
| tSirRetStatus retCode; |
| uint32_t val = 0; |
| |
| if (pMlmSetKeysReq->numKeys > SIR_MAC_MAX_NUM_OF_DEFAULT_KEYS) { |
| lim_log(pMac, LOG1, |
| FL |
| ("numKeys = %d is more than SIR_MAC_MAX_NUM_OF_DEFAULT_KEYS"), |
| pMlmSetKeysReq->numKeys); |
| |
| /* Respond to SME with error code */ |
| mlmSetKeysCnf.resultCode = eSIR_SME_INVALID_PARAMETERS; |
| goto end; |
| } |
| /* Package WMA_SET_BSSKEY_REQ message parameters */ |
| |
| pSetBssKeyParams = qdf_mem_malloc(sizeof(tSetBssKeyParams)); |
| if (NULL == pSetBssKeyParams) { |
| lim_log(pMac, LOGE, |
| FL("Unable to allocate memory during SET_BSSKEY")); |
| |
| /* Respond to SME with error code */ |
| mlmSetKeysCnf.resultCode = eSIR_SME_RESOURCES_UNAVAILABLE; |
| goto end; |
| } else |
| qdf_mem_set((void *)pSetBssKeyParams, |
| sizeof(tSetBssKeyParams), 0); |
| |
| /* Update the WMA_SET_BSSKEY_REQ parameters */ |
| pSetBssKeyParams->bssIdx = psessionEntry->bssIdx; |
| pSetBssKeyParams->encType = pMlmSetKeysReq->edType; |
| |
| if (eSIR_SUCCESS != wlan_cfg_get_int(pMac, WNI_CFG_SINGLE_TID_RC, &val)) { |
| lim_log(pMac, LOGP, FL("Unable to read WNI_CFG_SINGLE_TID_RC")); |
| } |
| |
| pSetBssKeyParams->singleTidRc = (uint8_t) val; |
| |
| /* Update PE session Id */ |
| pSetBssKeyParams->sessionId = psessionEntry->peSessionId; |
| |
| pSetBssKeyParams->smesessionId = pMlmSetKeysReq->smesessionId; |
| |
| if (pMlmSetKeysReq->key[0].keyId && |
| ((pMlmSetKeysReq->edType == eSIR_ED_WEP40) || |
| (pMlmSetKeysReq->edType == eSIR_ED_WEP104)) |
| ) { |
| /* IF the key id is non-zero and encryption type is WEP, Send all the 4 |
| * keys to HAL with filling the key at right index in pSetBssKeyParams->key. */ |
| pSetBssKeyParams->numKeys = SIR_MAC_MAX_NUM_OF_DEFAULT_KEYS; |
| qdf_mem_copy((uint8_t *) &pSetBssKeyParams-> |
| key[pMlmSetKeysReq->key[0].keyId], |
| (uint8_t *) &pMlmSetKeysReq->key[0], |
| sizeof(pMlmSetKeysReq->key[0])); |
| |
| } else { |
| pSetBssKeyParams->numKeys = pMlmSetKeysReq->numKeys; |
| qdf_mem_copy((uint8_t *) &pSetBssKeyParams->key, |
| (uint8_t *) &pMlmSetKeysReq->key, |
| sizeof(tSirKeys) * pMlmSetKeysReq->numKeys); |
| } |
| |
| SET_LIM_PROCESS_DEFD_MESGS(pMac, false); |
| msgQ.type = WMA_SET_BSSKEY_REQ; |
| msgQ.reserved = 0; |
| msgQ.bodyptr = pSetBssKeyParams; |
| msgQ.bodyval = 0; |
| |
| lim_log(pMac, LOGW, FL("Sending WMA_SET_BSSKEY_REQ...")); |
| MTRACE(mac_trace_msg_tx(pMac, psessionEntry->peSessionId, msgQ.type)); |
| retCode = wma_post_ctrl_msg(pMac, &msgQ); |
| if (eSIR_SUCCESS != retCode) { |
| lim_log(pMac, LOGE, |
| FL("Posting SET_BSSKEY to HAL failed, reason=%X"), |
| retCode); |
| |
| /* Respond to SME with LIM_MLM_SETKEYS_CNF */ |
| mlmSetKeysCnf.resultCode = eSIR_SME_HAL_SEND_MESSAGE_FAIL; |
| } else |
| return; /* Continue after WMA_SET_BSSKEY_RSP... */ |
| |
| end: |
| lim_post_sme_set_keys_cnf(pMac, pMlmSetKeysReq, &mlmSetKeysCnf); |
| |
| } |
| |
| /** |
| * @function : lim_send_set_sta_key_req() |
| * |
| * @brief : This function is called from lim_process_mlm_set_keys_req(), |
| * when PE is trying to setup the Unicast Keys related |
| * to a specified STA with specified encryption type |
| * |
| ***LOGIC: |
| * |
| ***ASSUMPTIONS: |
| * NA |
| * |
| ***NOTE: |
| * NA |
| * |
| * @param pMac Pointer to Global MAC structure |
| * @param pMlmSetKeysReq Pointer to MLM_SETKEYS_REQ buffer |
| * @param staIdx STA index for which the keys are being set |
| * @param defWEPIdx The default WEP key index [0..3] |
| * @return none |
| */ |
| void lim_send_set_sta_key_req(tpAniSirGlobal pMac, |
| tLimMlmSetKeysReq *pMlmSetKeysReq, |
| uint16_t staIdx, |
| uint8_t defWEPIdx, |
| tpPESession sessionEntry, bool sendRsp) |
| { |
| tSirMsgQ msgQ; |
| tpSetStaKeyParams pSetStaKeyParams = NULL; |
| tLimMlmSetKeysCnf mlmSetKeysCnf; |
| tSirRetStatus retCode; |
| uint32_t val = 0; |
| |
| /* Package WMA_SET_STAKEY_REQ message parameters */ |
| pSetStaKeyParams = qdf_mem_malloc(sizeof(tSetStaKeyParams)); |
| if (NULL == pSetStaKeyParams) { |
| lim_log(pMac, LOGP, |
| FL("Unable to allocate memory during SET_BSSKEY")); |
| return; |
| } else |
| qdf_mem_set((void *)pSetStaKeyParams, sizeof(tSetStaKeyParams), |
| 0); |
| |
| /* Update the WMA_SET_STAKEY_REQ parameters */ |
| pSetStaKeyParams->staIdx = staIdx; |
| pSetStaKeyParams->encType = pMlmSetKeysReq->edType; |
| |
| if (eSIR_SUCCESS != wlan_cfg_get_int(pMac, WNI_CFG_SINGLE_TID_RC, &val)) { |
| lim_log(pMac, LOGP, FL("Unable to read WNI_CFG_SINGLE_TID_RC")); |
| } |
| |
| pSetStaKeyParams->singleTidRc = (uint8_t) val; |
| |
| /* Update PE session ID */ |
| pSetStaKeyParams->sessionId = sessionEntry->peSessionId; |
| |
| /** |
| * For WEP - defWEPIdx indicates the default WEP |
| * Key to be used for TX |
| * For all others, there's just one key that can |
| * be used and hence it is assumed that |
| * defWEPIdx = 0 (from the caller) |
| */ |
| |
| pSetStaKeyParams->defWEPIdx = defWEPIdx; |
| |
| pSetStaKeyParams->smesessionId = pMlmSetKeysReq->smesessionId; |
| qdf_copy_macaddr(&pSetStaKeyParams->peer_macaddr, |
| &pMlmSetKeysReq->peer_macaddr); |
| |
| if (sendRsp == true) { |
| /** Store the Previous MlmState*/ |
| sessionEntry->limPrevMlmState = sessionEntry->limMlmState; |
| SET_LIM_PROCESS_DEFD_MESGS(pMac, false); |
| } |
| |
| if (LIM_IS_IBSS_ROLE(sessionEntry) |
| && !pMlmSetKeysReq->key[0].unicast) { |
| if (sendRsp == true) |
| sessionEntry->limMlmState = |
| eLIM_MLM_WT_SET_STA_BCASTKEY_STATE; |
| msgQ.type = WMA_SET_STA_BCASTKEY_REQ; |
| } else { |
| if (sendRsp == true) |
| sessionEntry->limMlmState = |
| eLIM_MLM_WT_SET_STA_KEY_STATE; |
| msgQ.type = WMA_SET_STAKEY_REQ; |
| } |
| MTRACE(mac_trace |
| (pMac, TRACE_CODE_MLM_STATE, sessionEntry->peSessionId, |
| sessionEntry->limMlmState)); |
| |
| /** |
| * In the Case of WEP_DYNAMIC, ED_TKIP and ED_CCMP |
| * the Key[0] contains the KEY, so just copy that alone, |
| * for the case of WEP_STATIC the hal gets the key from cfg |
| */ |
| switch (pMlmSetKeysReq->edType) { |
| case eSIR_ED_WEP40: |
| case eSIR_ED_WEP104: |
| /* FIXME! Is this OK? */ |
| if (0 == pMlmSetKeysReq->numKeys) { |
| uint32_t i; |
| |
| for (i = 0; i < SIR_MAC_MAX_NUM_OF_DEFAULT_KEYS; i++) { |
| qdf_mem_copy((uint8_t *) &pSetStaKeyParams-> |
| key[i], |
| (uint8_t *) &pMlmSetKeysReq-> |
| key[i], sizeof(tSirKeys)); |
| } |
| pSetStaKeyParams->wepType = eSIR_WEP_STATIC; |
| sessionEntry->limMlmState = |
| eLIM_MLM_WT_SET_STA_KEY_STATE; |
| MTRACE(mac_trace |
| (pMac, TRACE_CODE_MLM_STATE, |
| sessionEntry->peSessionId, |
| sessionEntry->limMlmState)); |
| } else { |
| /*This case the keys are coming from upper layer so need to fill the |
| * key at the default wep key index and send to the HAL */ |
| if (defWEPIdx < SIR_MAC_MAX_NUM_OF_DEFAULT_KEYS) { |
| qdf_mem_copy((uint8_t *) &pSetStaKeyParams-> |
| key[defWEPIdx], |
| (uint8_t *) &pMlmSetKeysReq-> |
| key[0], |
| sizeof(pMlmSetKeysReq->key[0])); |
| pMlmSetKeysReq->numKeys = |
| SIR_MAC_MAX_NUM_OF_DEFAULT_KEYS; |
| } else { |
| lim_log(pMac, LOGE, FL("Wrong Key Index %d"), |
| defWEPIdx); |
| qdf_mem_free(pSetStaKeyParams); |
| return; |
| } |
| } |
| break; |
| case eSIR_ED_TKIP: |
| case eSIR_ED_CCMP: |
| #ifdef FEATURE_WLAN_WAPI |
| case eSIR_ED_WPI: |
| #endif |
| { |
| qdf_mem_copy((uint8_t *) &pSetStaKeyParams->key, |
| (uint8_t *) &pMlmSetKeysReq->key[0], |
| sizeof(tSirKeys)); |
| } |
| break; |
| default: |
| break; |
| } |
| |
| pSetStaKeyParams->sendRsp = sendRsp; |
| |
| msgQ.reserved = 0; |
| msgQ.bodyptr = pSetStaKeyParams; |
| msgQ.bodyval = 0; |
| |
| lim_log(pMac, LOG1, FL("Sending WMA_SET_STAKEY_REQ...")); |
| MTRACE(mac_trace_msg_tx(pMac, sessionEntry->peSessionId, msgQ.type)); |
| retCode = wma_post_ctrl_msg(pMac, &msgQ); |
| if (eSIR_SUCCESS != retCode) { |
| lim_log(pMac, LOGE, |
| FL("Posting SET_STAKEY to HAL failed, reason=%X"), |
| retCode); |
| /* Respond to SME with LIM_MLM_SETKEYS_CNF */ |
| mlmSetKeysCnf.resultCode = eSIR_SME_HAL_SEND_MESSAGE_FAIL; |
| } else |
| return; /* Continue after WMA_SET_STAKEY_RSP... */ |
| |
| if (sendRsp == true) |
| lim_post_sme_set_keys_cnf(pMac, pMlmSetKeysReq, &mlmSetKeysCnf); |
| } |