mirror of
https://github.com/bol-van/zapret.git
synced 2024-12-20 23:11:34 +03:00
134 lines
3.7 KiB
Diff
134 lines
3.7 KiB
Diff
Index: WireGuard-0.0.20190123/src/cookie.c
|
|
===================================================================
|
|
--- WireGuard-0.0.20190123.orig/src/cookie.c
|
|
+++ WireGuard-0.0.20190123/src/cookie.c
|
|
@@ -193,6 +193,8 @@ void wg_cookie_message_create(struct mes
|
|
xchacha20poly1305_encrypt(dst->encrypted_cookie, cookie, COOKIE_LEN,
|
|
macs->mac1, COOKIE_LEN, dst->nonce,
|
|
checker->cookie_encryption_key);
|
|
+ // MOD : randomize trash
|
|
+ dst->header.trash = gen_trash();
|
|
}
|
|
|
|
void wg_cookie_message_consume(struct message_handshake_cookie *src,
|
|
Index: WireGuard-0.0.20190123/src/messages.h
|
|
===================================================================
|
|
--- WireGuard-0.0.20190123.orig/src/messages.h
|
|
+++ WireGuard-0.0.20190123/src/messages.h
|
|
@@ -53,23 +53,41 @@ enum limits {
|
|
MAX_QUEUED_PACKETS = 1024 /* TODO: replace this with DQL */
|
|
};
|
|
|
|
+/*
|
|
enum message_type {
|
|
- MESSAGE_INVALID = 0,
|
|
- MESSAGE_HANDSHAKE_INITIATION = 1,
|
|
- MESSAGE_HANDSHAKE_RESPONSE = 2,
|
|
- MESSAGE_HANDSHAKE_COOKIE = 3,
|
|
- MESSAGE_DATA = 4
|
|
+ MESSAGE_INVALID = 0,
|
|
+ MESSAGE_HANDSHAKE_INITIATION = 1,
|
|
+ MESSAGE_HANDSHAKE_RESPONSE = 2,
|
|
+ MESSAGE_HANDSHAKE_COOKIE = 3,
|
|
+ MESSAGE_DATA = 4
|
|
};
|
|
+*/
|
|
+
|
|
+// MOD : message type
|
|
+enum message_type {
|
|
+ MESSAGE_INVALID = 0xE319CCD0,
|
|
+ MESSAGE_HANDSHAKE_INITIATION = 0x48ADE198,
|
|
+ MESSAGE_HANDSHAKE_RESPONSE = 0xFCA6A8F3,
|
|
+ MESSAGE_HANDSHAKE_COOKIE = 0x64A3BB18,
|
|
+ MESSAGE_DATA = 0x391820AA
|
|
+};
|
|
+
|
|
+// MOD : generate fast trash without true RNG
|
|
+__le32 gen_trash(void);
|
|
|
|
struct message_header {
|
|
- /* The actual layout of this that we want is:
|
|
- * u8 type
|
|
- * u8 reserved_zero[3]
|
|
- *
|
|
- * But it turns out that by encoding this as little endian,
|
|
- * we achieve the same thing, and it makes checking faster.
|
|
- */
|
|
- __le32 type;
|
|
+ /* The actual layout of this that we want is:
|
|
+ * u8 type
|
|
+ * u8 reserved_zero[3]
|
|
+ *
|
|
+ * But it turns out that by encoding this as little endian,
|
|
+ * we achieve the same thing, and it makes checking faster.
|
|
+ */
|
|
+
|
|
+ // MOD : trash field to change message size and add 4 byte offset to all fields
|
|
+ __le32 trash;
|
|
+
|
|
+ __le32 type;
|
|
};
|
|
|
|
struct message_macs {
|
|
Index: WireGuard-0.0.20190123/src/noise.c
|
|
===================================================================
|
|
--- WireGuard-0.0.20190123.orig/src/noise.c
|
|
+++ WireGuard-0.0.20190123/src/noise.c
|
|
@@ -17,6 +17,24 @@
|
|
#include <linux/highmem.h>
|
|
#include <crypto/algapi.h>
|
|
|
|
+
|
|
+// MOD : trash generator
|
|
+__le32 gtrash = 0;
|
|
+__le32 gen_trash(void)
|
|
+{
|
|
+ if (gtrash)
|
|
+ gtrash = gtrash*1103515243 + 12345;
|
|
+ else
|
|
+ // first value is true random
|
|
+ get_random_bytes_wait(>rash, sizeof(gtrash));
|
|
+ return gtrash;
|
|
+}
|
|
+
|
|
/* This implements Noise_IKpsk2:
|
|
*
|
|
* <- s
|
|
@@ -515,6 +533,10 @@ wg_noise_handshake_create_initiation(str
|
|
&handshake->entry);
|
|
|
|
handshake->state = HANDSHAKE_CREATED_INITIATION;
|
|
+
|
|
+ // MOD : randomize trash
|
|
+ dst->header.trash = gen_trash();
|
|
+
|
|
ret = true;
|
|
|
|
out:
|
|
@@ -655,6 +677,10 @@ bool wg_noise_handshake_create_response(
|
|
&handshake->entry);
|
|
|
|
handshake->state = HANDSHAKE_CREATED_RESPONSE;
|
|
+
|
|
+ // MOD : randomize trash
|
|
+ dst->header.trash = gen_trash();
|
|
+
|
|
ret = true;
|
|
|
|
out:
|
|
Index: WireGuard-0.0.20190123/src/send.c
|
|
===================================================================
|
|
--- WireGuard-0.0.20190123.orig/src/send.c
|
|
+++ WireGuard-0.0.20190123/src/send.c
|
|
@@ -200,6 +200,10 @@ static bool encrypt_packet(struct sk_buf
|
|
header->header.type = cpu_to_le32(MESSAGE_DATA);
|
|
header->key_idx = keypair->remote_index;
|
|
header->counter = cpu_to_le64(PACKET_CB(skb)->nonce);
|
|
+
|
|
+ // MOD : randomize trash
|
|
+ header->header.trash = gen_trash();
|
|
+
|
|
pskb_put(skb, trailer, trailer_len);
|
|
|
|
/* Now we can encrypt the scattergather segments */
|