Changeset a931b7b in mainline for uspace/lib/ieee80211/src/ieee80211_impl.c

Timestamp:

2015-04-13T20:48:33Z (9 years ago)

Author:

Jan Kolarik <kolarik@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

cc575ef9

Parents:

053fc2b

Message:

Added TKIP support, handling old WPA in 4way handshake, some fixes in wifi_supplicant app

File:

• uspace/lib/ieee80211/src/ieee80211_impl.c (modified) (5 diffs)

uspace/lib/ieee80211/src/ieee80211_impl.c

@@ -165 +165 @@
 
 /**
- * Pseudorandom function used for IEEE 802.11 pairwise key computation.
+ * Pseudorandom function used for IEEE 802.11 pairwise key computation
+ * using SHA1 hash algorithm.
  * 
  * @param key Key with PBKDF2 encrypted passphrase.
  * @param data Concatenated sequence of both mac addresses and nonces.
- * @param hash Output parameter for result hash (48 byte value).
- * @param hash_sel Hash function selector.
+ * @param hash Output parameter for result hash.
+ * @param output_size Length of output sequence to be generated.
  * 
  * @return EINVAL when key or data not specified, ENOMEM when pointer for 
@@ -176 +177 @@
  */
 int ieee80211_prf(uint8_t *key, uint8_t *data, uint8_t *hash, 
-        hash_func_t hash_sel)
+        size_t output_size)
 {
         if(!key || !data)
@@ -184 +185 @@
                 return ENOMEM;
         
-        size_t result_length = (hash_sel == HASH_MD5) ? 
-                IEEE80211_PTK_TKIP_LENGTH : IEEE80211_PTK_CCMP_LENGTH;
-        size_t iters = ((result_length * 8) + 159) / 160;
+        size_t iters = ((output_size * 8) + 159) / 160;
         
         const char *a = "Pairwise key expansion";
-        uint8_t result[hash_sel*iters];
-        uint8_t temp[hash_sel];
+        uint8_t result[HASH_SHA1*iters];
+        uint8_t temp[HASH_SHA1];
         size_t data_size = PRF_CRYPT_DATA_LENGTH + str_size(a) + 2;
         uint8_t work_arr[data_size];
@@ -201 +200 @@
                 memcpy(work_arr + data_size - 1, &i, 1);
                 hmac(key, PBKDF2_KEY_LENGTH, work_arr, data_size, temp, 
-                        hash_sel);
-                memcpy(result + i*hash_sel, temp, hash_sel);
-        }
-        
-        memcpy(hash, result, result_length);
-        
-        return EOK;
+                        HASH_SHA1);
+                memcpy(result + i*HASH_SHA1, temp, HASH_SHA1);
+        }
+        
+        memcpy(hash, result, output_size);
+        
+        return EOK;
+}
+
+int ieee80211_rc4_key_unwrap(uint8_t *key, uint8_t *data, size_t data_size,
+        uint8_t *output)
+{
+        return rc4(key, 32, data, data_size, 256, output);
 }
 
@@ -230 +235 @@
         
         memcpy(work_data, data + 8, n*8);
-        for(int j = 5; j >=0; j--) {
+        for(int j = 5; j >= 0; j--) {
                 for(int i = n; i > 0; i--) {
                         for(size_t k = 0; k < 8; k++) {