OpenWrt – Blame information for rev 2

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1 office 1 /*
2 * Copyright (C) 2009-2011 Gabor Juhos <juhosg@openwrt.org>
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 as published
6 * by the Free Software Foundation.
7 *
8 */
9  
10 #ifndef _BUFFALO_LIB_H
11 #define _BUFFALO_LIB_H
12  
13 #include <stdint.h>
14  
15 #define ARRAY_SIZE(_a) (sizeof((_a)) / sizeof((_a)[0]))
16 #define BIT(_x) (1UL << (_x))
17  
18 #define TAG_BRAND_LEN 32
19 #define TAG_PRODUCT_LEN 32
20 #define TAG_VERSION_LEN 8
21 #define TAG_REGION_LEN 2
22 #define TAG_LANGUAGE_LEN 8
23 #define TAG_PLATFORM_LEN 8
24 #define TAG_HWVER_LEN 4
25 #define TAG_HWVER_VAL_LEN 4
26  
27 struct buffalo_tag {
28 unsigned char product[TAG_PRODUCT_LEN];
29 unsigned char brand[TAG_BRAND_LEN];
30 unsigned char ver_major[TAG_VERSION_LEN];
31 unsigned char ver_minor[TAG_VERSION_LEN];
32 unsigned char region_code[2];
33 uint32_t region_mask;
34 unsigned char unknown0[2];
35 unsigned char language[TAG_LANGUAGE_LEN];
36 unsigned char platform[TAG_PLATFORM_LEN];
37 unsigned char hwv[TAG_HWVER_LEN];
38 unsigned char hwv_val[TAG_HWVER_VAL_LEN];
39 uint8_t unknown1[24];
40  
41 uint32_t len;
42 uint32_t crc;
43 uint32_t base1;
44 uint32_t base2;
45 uint32_t data_len;
46 uint8_t flag;
47 uint8_t unknown2[3];
48 } __attribute ((packed));
49  
50 struct buffalo_tag2 {
51 unsigned char product[TAG_PRODUCT_LEN];
52 unsigned char brand[TAG_BRAND_LEN];
53 unsigned char ver_major[TAG_VERSION_LEN];
54 unsigned char ver_minor[TAG_VERSION_LEN];
55 unsigned char region_code[2];
56 uint32_t region_mask;
57 unsigned char unknown0[2];
58 unsigned char language[TAG_LANGUAGE_LEN];
59 unsigned char platform[TAG_PLATFORM_LEN];
60 unsigned char hwv[TAG_HWVER_LEN];
61 unsigned char hwv_val[TAG_HWVER_VAL_LEN];
62 uint8_t unknown1[24];
63  
64 uint32_t total_len;
65 uint32_t crc;
66 uint32_t len1;
67 uint32_t len2;
68 uint8_t flag;
69 uint8_t unknown2[3];
70 } __attribute ((packed));
71  
72 struct buffalo_tag3 {
73 unsigned char product[TAG_PRODUCT_LEN];
74 unsigned char brand[TAG_BRAND_LEN];
75 unsigned char ver_major[TAG_VERSION_LEN];
76 unsigned char ver_minor[TAG_VERSION_LEN];
77 unsigned char region_code[2];
78 uint32_t region_mask;
79 unsigned char unknown0[2];
80 unsigned char language[TAG_LANGUAGE_LEN];
81 unsigned char platform[TAG_PLATFORM_LEN];
82 unsigned char hwv[TAG_HWVER_LEN];
83 unsigned char hwv_val[TAG_HWVER_VAL_LEN];
84 uint8_t unknown1[24];
85  
86 uint32_t total_len;
87 uint32_t crc;
88 uint32_t len1;
89 uint32_t base2;
90 } __attribute ((packed));
91  
92 #define ENC_PRODUCT_LEN 32
93 #define ENC_VERSION_LEN 8
94 #define ENC_MAGIC_LEN 6
95  
96 unsigned long enc_compute_header_len(char *product, char *version);
97 unsigned long enc_compute_buf_len(char *product, char *version,
98 unsigned long datalen);
99  
100 struct enc_param {
101 unsigned char *key;
102 unsigned char magic[ENC_MAGIC_LEN];
103 unsigned char product[ENC_PRODUCT_LEN];
104 unsigned char version[ENC_VERSION_LEN];
105 unsigned char seed;
106 int longstate;
107 unsigned datalen;
108 uint32_t csum;
109 };
110  
111 int encrypt_buf(struct enc_param *ep, unsigned char *hdr,
112 unsigned char *data);
113 int decrypt_buf(struct enc_param *ep, unsigned char *data,
114 unsigned long datalen);
115  
116 #define BCRYPT_DEFAULT_STATE_LEN 256
117 #define BCRYPT_MAX_KEYLEN 254
118  
119 struct bcrypt_ctx {
120 unsigned long i;
121 unsigned long j;
122 unsigned char *state;
123 unsigned long state_len;
124 };
125  
126 int bcrypt_init(struct bcrypt_ctx *ctx, void *key, int keylen,
127 unsigned long state_len);
128 int bcrypt_process(struct bcrypt_ctx *ctx, unsigned char *src,
129 unsigned char *dst, unsigned long len);
130 void bcrypt_finish(struct bcrypt_ctx *ctx);
131 int bcrypt_buf(unsigned char seed, unsigned char *key, unsigned char *src,
132 unsigned char *dst, unsigned long len, int longstate);
133  
134 uint32_t buffalo_csum(uint32_t csum, void *buf, unsigned long len);
135 uint32_t buffalo_crc(void *buf, unsigned long len);
136  
137 ssize_t get_file_size(char *name);
138 int read_file_to_buf(char *name, void *buf, ssize_t buflen);
139 int write_buf_to_file(char *name, void *buf, ssize_t buflen);
140  
141 #endif /* _BUFFALO_LIB_H */