Import of WPA supplicant 0.4.8

1 files changed, 57 insertions, 0 deletions

diff --git a/contrib/wpa_supplicant/eap_psk_common.c b/contrib/wpa_supplicant/eap_psk_common.c
new file mode 100644
index 0000000..24de66c
--- /dev/null
+++ b/contrib/wpa_supplicant/eap_psk_common.c
@@ -0,0 +1,57 @@
+/*
+ * WPA Supplicant / EAP-PSK shared routines
+ * Copyright (c) 2004-2005, Jouni Malinen <jkmaline@cc.hut.fi>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Alternatively, this software may be distributed under the terms of BSD
+ * license.
+ *
+ * See README and COPYING for more details.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "common.h"
+#include "aes_wrap.h"
+#include "eap_psk_common.h"
+
+#define aes_block_size 16
+
+
+void eap_psk_key_setup(const u8 *psk, u8 *ak, u8 *kdk)
+{
+	memset(ak, 0, aes_block_size);
+	aes_128_encrypt_block(psk, ak, ak);
+	memcpy(kdk, ak, aes_block_size);
+	ak[aes_block_size - 1] ^= 0x01;
+	kdk[aes_block_size - 1] ^= 0x02;
+	aes_128_encrypt_block(psk, ak, ak);
+	aes_128_encrypt_block(psk, kdk, kdk);
+}
+
+
+void eap_psk_derive_keys(const u8 *kdk, const u8 *rand_p, u8 *tek, u8 *msk)
+{
+	u8 hash[aes_block_size];
+	u8 counter = 1;
+	int i;
+
+	aes_128_encrypt_block(kdk, rand_p, hash);
+
+	hash[aes_block_size - 1] ^= counter;
+	aes_128_encrypt_block(kdk, hash, tek);
+	hash[aes_block_size - 1] ^= counter;
+	counter++;
+
+	for (i = 0; i < EAP_PSK_MSK_LEN / aes_block_size; i++) {
+		hash[aes_block_size - 1] ^= counter;
+		aes_128_encrypt_block(kdk, hash, &msk[i * aes_block_size]);
+		hash[aes_block_size - 1] ^= counter;
+		counter++;
+	}
+}