1 /* 2 * Copyright (c) 2019 The Linux Foundation. All rights reserved. 3 * 4 * Permission to use, copy, modify, and/or distribute this software for 5 * any purpose with or without fee is hereby granted, provided that the 6 * above copyright notice and this permission notice appear in all 7 * copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL 10 * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED 11 * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE 12 * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 13 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 14 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 15 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 16 * PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 /** 20 * DOC: defines crypto driver functions interfacing with linux kernel 21 */ 22 #include <wlan_crypto_global_def.h> 23 #include <wlan_crypto_global_api.h> 24 #include <wlan_objmgr_vdev_obj.h> 25 #include <wlan_crypto_main_i.h> 26 #include <net/cfg80211.h> 27 #include <wlan_nl_to_crypto_params.h> 28 #include "wlan_cfg80211_crypto.h" 29 #include <wlan_cfg80211.h> 30 31 static void wlan_cfg80211_translate_key(struct wlan_objmgr_vdev *vdev, 32 uint8_t key_index, 33 enum wlan_crypto_key_type key_type, 34 const u8 *mac_addr, 35 struct key_params *params, 36 struct wlan_crypto_key *crypto_key) 37 { 38 qdf_mem_zero(crypto_key, sizeof(*crypto_key)); 39 crypto_key->keylen = params->key_len; 40 crypto_key->keyix = key_index; 41 qdf_mem_copy(&crypto_key->keyval[0], params->key, params->key_len); 42 qdf_mem_copy(&crypto_key->keyrsc[0], params->seq, params->seq_len); 43 44 crypto_key->cipher_type = osif_nl_to_crypto_cipher_type(params->cipher); 45 if (key_type == WLAN_CRYPTO_KEY_TYPE_UNICAST) { 46 qdf_mem_copy(&crypto_key->macaddr, mac_addr, QDF_MAC_ADDR_SIZE); 47 } else { 48 if ((vdev->vdev_mlme.vdev_opmode == QDF_STA_MODE) || 49 (vdev->vdev_mlme.vdev_opmode == QDF_P2P_CLIENT_MODE)) 50 qdf_mem_copy(&crypto_key->macaddr, mac_addr, 51 QDF_MAC_ADDR_SIZE); 52 else 53 qdf_mem_copy(&crypto_key->macaddr, 54 vdev->vdev_mlme.macaddr, 55 QDF_MAC_ADDR_SIZE); 56 } 57 cfg80211_debug("key_type %d, opmode %d, mac %pM", key_type, 58 vdev->vdev_mlme.vdev_opmode, crypto_key->macaddr); 59 } 60 61 int wlan_cfg80211_store_key(struct wlan_objmgr_vdev *vdev, 62 uint8_t key_index, 63 enum wlan_crypto_key_type key_type, 64 const u8 *mac_addr, struct key_params *params) 65 { 66 struct wlan_crypto_key *crypto_key = NULL; 67 enum wlan_crypto_cipher_type cipher; 68 int cipher_len; 69 QDF_STATUS status; 70 71 if (!vdev) { 72 cfg80211_err("vdev is NULL"); 73 return -EINVAL; 74 } 75 if (!params) { 76 cfg80211_err("Key params is NULL"); 77 return -EINVAL; 78 } 79 if ((key_type == WLAN_CRYPTO_KEY_TYPE_UNICAST) && !mac_addr) { 80 cfg80211_err("mac_addr is NULL for pairwise Key"); 81 return -EINVAL; 82 } 83 cipher_len = osif_nl_to_crypto_cipher_len(params->cipher); 84 if (cipher_len < 0 || params->key_len < cipher_len) { 85 cfg80211_err("cipher length %d less than reqd len %d", 86 params->key_len, cipher_len); 87 return -EINVAL; 88 } 89 cipher = osif_nl_to_crypto_cipher_type(params->cipher); 90 status = wlan_crypto_validate_key_params(cipher, key_index, 91 params->key_len, 92 params->seq_len); 93 if (QDF_IS_STATUS_ERROR(status)) { 94 cfg80211_err("Invalid key params"); 95 return -EINVAL; 96 } 97 98 /* 99 * key may already exist at times and may be retrieved only to 100 * update it. 101 */ 102 crypto_key = wlan_crypto_get_key(vdev, key_index); 103 if (!crypto_key) { 104 crypto_key = qdf_mem_malloc(sizeof(*crypto_key)); 105 if (!crypto_key) 106 return -EINVAL; 107 status = wlan_crypto_save_key(vdev, key_index, crypto_key); 108 if (QDF_IS_STATUS_ERROR(status)) { 109 cfg80211_err("Failed to save key"); 110 qdf_mem_free(crypto_key); 111 return -EINVAL; 112 } 113 } 114 115 wlan_cfg80211_translate_key(vdev, key_index, key_type, mac_addr, 116 params, crypto_key); 117 118 return 0; 119 } 120 121 int wlan_cfg80211_crypto_add_key(struct wlan_objmgr_vdev *vdev, 122 enum wlan_crypto_key_type key_type, 123 uint8_t key_index) 124 { 125 struct wlan_crypto_key *crypto_key; 126 QDF_STATUS status; 127 128 crypto_key = wlan_crypto_get_key(vdev, key_index); 129 if (!crypto_key) { 130 cfg80211_err("Crypto KEY is NULL"); 131 return -EINVAL; 132 } 133 status = ucfg_crypto_set_key_req(vdev, crypto_key, key_type); 134 135 return qdf_status_to_os_return(status); 136 } 137 138 #ifdef CONFIG_CRYPTO_COMPONENT 139 int wlan_cfg80211_set_default_key(struct wlan_objmgr_vdev *vdev, 140 uint8_t key_index, struct qdf_mac_addr *bssid) 141 { 142 return wlan_crypto_default_key(vdev, (uint8_t *)bssid, 143 key_index, true); 144 } 145 #endif 146