122 lines
3.3 KiB
C
122 lines
3.3 KiB
C
/*
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* Copyright (C) 2009-2011 Gabor Juhos <juhosg@openwrt.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*
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*/
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#ifndef _BUFFALO_LIB_H
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#define _BUFFALO_LIB_H
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#include <stdint.h>
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#define ARRAY_SIZE(_a) (sizeof((_a)) / sizeof((_a)[0]))
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#define BIT(_x) (1UL << (_x))
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#define TAG_BRAND_LEN 32
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#define TAG_PRODUCT_LEN 32
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#define TAG_VERSION_LEN 8
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#define TAG_REGION_LEN 2
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#define TAG_LANGUAGE_LEN 8
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#define TAG_PLATFORM_LEN 8
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#define TAG_HWVER_LEN 4
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#define TAG_HWVER_VAL_LEN 4
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struct buffalo_tag {
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unsigned char product[TAG_PRODUCT_LEN];
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unsigned char brand[TAG_BRAND_LEN];
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unsigned char ver_major[TAG_VERSION_LEN];
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unsigned char ver_minor[TAG_VERSION_LEN];
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unsigned char region_code[2];
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uint32_t region_mask;
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unsigned char unknown0[2];
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unsigned char language[TAG_LANGUAGE_LEN];
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unsigned char platform[TAG_PLATFORM_LEN];
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unsigned char hwv[TAG_HWVER_LEN];
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unsigned char hwv_val[TAG_HWVER_VAL_LEN];
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uint8_t unknown1[24];
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uint32_t len;
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uint32_t crc;
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uint32_t base1;
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uint32_t base2;
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uint32_t data_len;
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uint8_t flag;
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uint8_t unknown2[3];
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} __attribute ((packed));
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struct buffalo_tag2 {
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unsigned char product[TAG_PRODUCT_LEN];
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unsigned char brand[TAG_BRAND_LEN];
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unsigned char ver_major[TAG_VERSION_LEN];
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unsigned char ver_minor[TAG_VERSION_LEN];
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unsigned char region_code[2];
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uint32_t region_mask;
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unsigned char unknown0[2];
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unsigned char language[TAG_LANGUAGE_LEN];
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unsigned char platform[TAG_PLATFORM_LEN];
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unsigned char hwv[TAG_HWVER_LEN];
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unsigned char hwv_val[TAG_HWVER_VAL_LEN];
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uint8_t unknown1[24];
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uint32_t total_len;
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uint32_t crc;
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uint32_t len1;
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uint32_t len2;
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uint8_t flag;
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uint8_t unknown2[3];
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} __attribute ((packed));
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#define ENC_PRODUCT_LEN 32
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#define ENC_VERSION_LEN 8
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#define ENC_MAGIC_LEN 6
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unsigned long enc_compute_header_len(char *product, char *version);
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unsigned long enc_compute_buf_len(char *product, char *version,
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unsigned long datalen);
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struct enc_param {
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unsigned char *key;
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unsigned char magic[ENC_MAGIC_LEN];
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unsigned char product[ENC_PRODUCT_LEN];
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unsigned char version[ENC_VERSION_LEN];
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unsigned char seed;
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int longstate;
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unsigned datalen;
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uint32_t csum;
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};
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int encrypt_buf(struct enc_param *ep, unsigned char *hdr,
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unsigned char *data);
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int decrypt_buf(struct enc_param *ep, unsigned char *data,
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unsigned long datalen);
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#define BCRYPT_DEFAULT_STATE_LEN 256
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#define BCRYPT_MAX_KEYLEN 254
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struct bcrypt_ctx {
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unsigned long i;
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unsigned long j;
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unsigned char *state;
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unsigned long state_len;
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};
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int bcrypt_init(struct bcrypt_ctx *ctx, void *key, int keylen,
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unsigned long state_len);
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int bcrypt_process(struct bcrypt_ctx *ctx, unsigned char *src,
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unsigned char *dst, unsigned long len);
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void bcrypt_finish(struct bcrypt_ctx *ctx);
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int bcrypt_buf(unsigned char seed, unsigned char *key, unsigned char *src,
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unsigned char *dst, unsigned long len, int longstate);
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uint32_t buffalo_csum(uint32_t csum, void *buf, unsigned long len);
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uint32_t buffalo_crc(void *buf, unsigned long len);
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ssize_t get_file_size(char *name);
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int read_file_to_buf(char *name, void *buf, ssize_t buflen);
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int write_buf_to_file(char *name, void *buf, ssize_t buflen);
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#endif /* _BUFFALO_LIB_H */
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