packages: sort network related packages into package/network/

[openwrt/openwrt.git] / package / ead / src / ead-crypt.c

diff --git a/package/ead/src/ead-crypt.c b/package/ead/src/ead-crypt.c
deleted file mode 100644 (file)
index 0372172..0000000
--- a/package/ead/src/ead-crypt.c
+++ /dev/null
@@ -1,179 +0,0 @@
-/*
- * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
- *
- * 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
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- */
-
-#include <stddef.h>
-#include <stdint.h>
-#include <stdlib.h>
-#include <stdbool.h>
-#include <string.h>
-#include <unistd.h>
-#include <stdio.h>
-#include "ead.h"
-
-#include "sha1.c"
-#include "aes.c"
-
-#if EAD_DEBUGLEVEL >= 1
-#define DEBUG(n, format, ...) do { \
-       if (EAD_DEBUGLEVEL >= n) \
-               fprintf(stderr, format, ##__VA_ARGS__); \
-} while (0);
-
-#else
-#define DEBUG(n, format, ...) do {} while(0)
-#endif
-
-
-static uint32_t aes_enc_ctx[AES_PRIV_SIZE];
-static uint32_t aes_dec_ctx[AES_PRIV_SIZE];
-static uint32_t ead_rx_iv;
-static uint32_t ead_tx_iv;
-static uint32_t ivofs_vec;
-static unsigned int ivofs_idx = 0;
-static uint32_t W[80]; /* work space for sha1 */
-
-#define EAD_ENC_PAD    64
-
-void
-ead_set_key(unsigned char *skey)
-{
-       uint32_t *ivp = (uint32_t *)skey;
-
-       memset(aes_enc_ctx, 0, sizeof(aes_enc_ctx));
-       memset(aes_dec_ctx, 0, sizeof(aes_dec_ctx));
-
-       /* first 32 bytes of skey are used as aes key for
-        * encryption and decryption */
-       rijndaelKeySetupEnc(aes_enc_ctx, skey);
-       rijndaelKeySetupDec(aes_dec_ctx, skey);
-
-       /* the following bytes are used as initialization vector for messages
-        * (highest byte cleared to avoid overflow) */
-       ivp += 8;
-       ead_rx_iv = ntohl(*ivp) & 0x00ffffff;
-       ead_tx_iv = ead_rx_iv;
-
-       /* the last bytes are used to feed the random iv increment */
-       ivp++;
-       ivofs_vec = *ivp;
-}
-
-
-static bool
-ead_check_rx_iv(uint32_t iv)
-{
-       if (iv <= ead_rx_iv)
-               return false;
-
-       if (iv > ead_rx_iv + EAD_MAX_IV_INCR)
-               return false;
-
-       ead_rx_iv = iv;
-       return true;
-}
-
-
-static uint32_t
-ead_get_tx_iv(void)
-{
-       unsigned int ofs;
-
-       ofs = 1 + ((ivofs_vec >> 2 * ivofs_idx) & 0x3);
-       ivofs_idx = (ivofs_idx + 1) % 16;
-       ead_tx_iv += ofs;
-
-       return ead_tx_iv;
-}
-
-static void
-ead_hash_message(struct ead_msg_encrypted *enc, uint32_t *hash, int len)
-{
-       unsigned char *data = (unsigned char *) enc;
-
-       /* hash the packet with the stored hash part initialized to zero */
-       sha_init(hash);
-       memset(enc->hash, 0, sizeof(enc->hash));
-       while (len > 0) {
-               sha_transform(hash, data, W);
-               len -= 64;
-               data += 64;
-       }
-}
-
-void
-ead_encrypt_message(struct ead_msg *msg, unsigned int len)
-{
-       struct ead_msg_encrypted *enc = EAD_DATA(msg, enc);
-       unsigned char *data = (unsigned char *) enc;
-       uint32_t hash[5];
-       int enclen, i;
-
-       len += sizeof(struct ead_msg_encrypted);
-       enc->pad = (EAD_ENC_PAD - (len % EAD_ENC_PAD)) % EAD_ENC_PAD;
-       enclen = len + enc->pad;
-       msg->len = htonl(enclen);
-       enc->iv = htonl(ead_get_tx_iv());
-
-       ead_hash_message(enc, hash, enclen);
-       for (i = 0; i < 5; i++)
-               enc->hash[i] = htonl(hash[i]);
-       DEBUG(2, "SHA1 generate (0x%08x), len=%d\n", enc->hash[0], enclen);
-
-       while (enclen > 0) {
-               rijndaelEncrypt(aes_enc_ctx, data, data);
-               data += 16;
-               enclen -= 16;
-       }
-}
-
-int
-ead_decrypt_message(struct ead_msg *msg)
-{
-       struct ead_msg_encrypted *enc = EAD_DATA(msg, enc);
-       unsigned char *data = (unsigned char *) enc;
-       uint32_t hash_old[5], hash_new[5];
-       int len = ntohl(msg->len);
-       int i, enclen = len;
-
-       if (!len || (len % EAD_ENC_PAD > 0))
-               return 0;
-
-       while (len > 0) {
-               rijndaelDecrypt(aes_dec_ctx, data, data);
-               data += 16;
-               len -= 16;
-       }
-
-       data = (unsigned char *) enc;
-
-       if (enc->pad >= EAD_ENC_PAD) {
-               DEBUG(2, "Invalid padding length\n");
-               return 0;
-       }
-
-       if (!ead_check_rx_iv(ntohl(enc->iv))) {
-               DEBUG(2, "RX IV mismatch (0x%08x <> 0x%08x)\n", ead_rx_iv, ntohl(enc->iv));
-               return 0;
-       }
-
-       for (i = 0; i < 5; i++)
-               hash_old[i] = ntohl(enc->hash[i]);
-       ead_hash_message(enc, hash_new, enclen);
-       if (memcmp(hash_old, hash_new, sizeof(hash_old)) != 0) {
-               DEBUG(2, "SHA1 mismatch (0x%08x != 0x%08x), len=%d\n", hash_old[0], hash_new[0], enclen);
-               return 0;
-       }
-
-       enclen -= enc->pad + sizeof(struct ead_msg_encrypted);
-       return enclen;
-}