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  1. @@ddwrtcg.c:
  2.  
  3. #include <stddef.h>
  4. #include <stdio.h>
  5. #include <stdint.h>
  6. #include <stdlib.h>
  7. #include <string.h>
  8. #include <unistd.h>
  9.  
  10. #define ARC4_STATE_LEN		256
  11. #define ARC4_MAX_STREAMLEN	0x40000000
  12.  
  13. #define DDWRT_KEY_LEN		28
  14. #define DDWRT_CODE_LEN		64
  15.  
  16. struct arc4ctx {
  17. 	unsigned char state[ARC4_STATE_LEN];
  18. 	unsigned long len;
  19. 	unsigned char i;
  20. 	unsigned char j;
  21. };
  22.  
  23. struct ddwrt_key {
  24. 	unsigned char	key[DDWRT_KEY_LEN];
  25. 	uint32_t	crc;
  26. };
  27.  
  28. static const uint32_t crc32tab[256] =
  29. {
  30.     0x00000000, 0x77073096, 0xee0e612c, 0x990951ba,
  31.     0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
  32.     0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
  33.     0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
  34.     0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
  35.     0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
  36.     0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec,
  37.     0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
  38.     0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
  39.     0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
  40.     0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940,
  41.     0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
  42.     0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116,
  43.     0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
  44.     0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
  45.     0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
  46.     0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a,
  47.     0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
  48.     0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818,
  49.     0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
  50.     0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
  51.     0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
  52.     0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c,
  53.     0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
  54.     0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
  55.     0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
  56.     0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
  57.     0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
  58.     0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086,
  59.     0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
  60.     0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4,
  61.     0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
  62.     0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
  63.     0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
  64.     0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
  65.     0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
  66.     0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe,
  67.     0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
  68.     0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
  69.     0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
  70.     0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252,
  71.     0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
  72.     0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60,
  73.     0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
  74.     0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
  75.     0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
  76.     0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04,
  77.     0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
  78.     0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a,
  79.     0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
  80.     0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
  81.     0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
  82.     0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e,
  83.     0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
  84.     0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
  85.     0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
  86.     0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
  87.     0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
  88.     0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0,
  89.     0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
  90.     0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6,
  91.     0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
  92.     0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
  93.     0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
  94. };
  95.  
  96. static uint32_t getcrc32(unsigned char *buf, unsigned long len, uint32_t crc)
  97. {
  98. 	while (len--)
  99. 		crc = (crc >> 8) ^ crc32tab[(crc ^ *buf++) & 0xff];
  100.  
  101. 	return crc;
  102. }
  103.  
  104. static const uint8_t hexchars[16] = "0123456789ABCDEF";
  105. static inline uint8_t hex2char(uint8_t c)
  106. {
  107. 	int i;
  108.  
  109. 	for (i = 0; i < sizeof(hexchars); i++) {
  110. 		if (hexchars[i] == c)
  111. 			return i;
  112. 	}
  113.  
  114. 	return 0;
  115. }
  116.  
  117. static void hex2key(char *hex, unsigned char *code)
  118. {
  119. 	int i;
  120.  
  121. 	for (i = 0; i < 32; i++) {
  122. 		uint8_t c1, c2;
  123.  
  124. 		c1 = hex2char(hex[2 * i]);
  125. 		c2 = hex2char(hex[2 * i + 1]);
  126.  
  127. 		*code++ = (c1 << 4) | c2;
  128. 	}
  129. }
  130.  
  131. static void arc4init(struct arc4ctx *ctx, void *key, int keylen)
  132. {
  133. 	uint8_t *state = ctx->state;
  134. 	uint8_t *p = key;
  135. 	int i;
  136. 	uint8_t j;
  137. 	uint8_t k = 0;
  138.  
  139. 	ctx->len = 0;
  140. 	for (i = 0; i < ARC4_STATE_LEN; i++)
  141. 		state[i] = i;
  142.  
  143. 	ctx->i = 0;
  144. 	ctx->j = 0;
  145.  
  146. 	for(i = 0, j = 0; i < 256; i++, j = (j + 1) % keylen) {
  147. 		uint8_t t;
  148.  
  149. 		t = state[i];
  150. 		state[i] = state[k += p[j] + t];
  151. 		state[k] = t;
  152. 	}
  153.  
  154. }
  155.  
  156. static int arc4crypt(struct arc4ctx *ctx, uint8_t *src, uint8_t *dst, int len)
  157. {
  158. 	uint8_t *state = ctx->state;
  159. 	uint8_t i, j;
  160. 	int k;
  161.  
  162. 	ctx->len +=len;
  163. 	if (ctx->len > ARC4_MAX_STREAMLEN)
  164. 		return -1;
  165.  
  166. 	i = ctx->i;
  167. 	j = ctx->j;
  168. 	for (k = 0; k < len; k++) {
  169. 		uint8_t t;
  170.  
  171. 		t = state[j += state[++i]];
  172. 		state[j] = state[i];
  173. 		state[i] = t;
  174.  
  175. 		dst[k] = src[k] ^ state[(state[i] + state[j]) & 0xff];
  176. 	}
  177. 	ctx->i = i;
  178. 	ctx->j = j;
  179.  
  180. 	return len;
  181. }
  182.  
  183. static void printkey(struct ddwrt_key *key)
  184. {
  185. 	uint8_t *p = (uint8_t *)key;
  186. 	int i;
  187.  
  188. 	for (i = 0; i < 32; i++)
  189. 		printf("%02X", p[i]);
  190.  
  191. 	printf("n");
  192. }
  193.  
  194. static void usage(int err)
  195. {
  196. 	fprintf(stderr, "Usage: ddwrtcg <mode> <code>n"
  197. 			"valid modes:n"
  198. 			"  -a   generate activation code for dd-wrt professionaln"
  199. 			"  -s   generate activation code for dd-wrt's superchannel featuren");
  200. 	exit(err);
  201. }
  202.  
  203. int main(int argc, char *argv[])
  204. {
  205. 	struct arc4ctx ctx;
  206. 	struct ddwrt_key ckey;
  207. 	struct ddwrt_key dkey;
  208. 	uint32_t crc;
  209. 	char *pwd = NULL;
  210. 	char *mode;
  211. 	char *code;
  212.  
  213. 	fprintf(stdout, "DD-WRT v24-sp1 activation code generator by DasIndividuumnn");
  214.  
  215. 	if (argc != 3)
  216. 		usage(1);
  217.  
  218. 	mode = argv[1];
  219. 	if (strcmp(mode, "-a") == 0) {
  220. 		pwd = "quampfmampf";
  221. 	} else if (strcmp(mode, "-s") == 0) {
  222. 		pwd = "schannelsuper";
  223. 	} else {
  224. 		fprintf(stderr, "ddwrtcg: unknown mode "%s"n", mode);
  225. 		usage(2);
  226. 	}
  227.  
  228. 	code = argv[2];
  229. 	if (strlen(code) != DDWRT_CODE_LEN) {
  230. 		fprintf(stderr, "ddwrtcg: code length must be %dn",
  231. 			DDWRT_CODE_LEN);
  232. 		exit(3);
  233. 	}
  234.  
  235. 	hex2key(code, (uint8_t *)&ckey);
  236. 	crc = getcrc32(ckey.key, sizeof(ckey.key), 0xffffffff);
  237. 	if (crc != ckey.crc) {
  238. 		fprintf(stderr, "ddwrtcg: invalid coden");
  239. 		exit(4);
  240. 	}
  241.  
  242. 	arc4init(&ctx, pwd, strlen(pwd));
  243. 	arc4crypt(&ctx, (uint8_t *)&ckey, (uint8_t *)&dkey, sizeof(dkey));
  244.  
  245. 	printkey(&dkey);
  246.  
  247. 	exit(0);
  248. }
  249.  
  250. @@Makefile:
  251. CC = gcc
  252.  
  253. SOURCES = ddwrtcg.c
  254.  
  255. all: ddwrtcg
  256.  
  257. ddwrtcg: $(SOURCES) Makefile
  258. 	$(CC) -Wall $(CFLAGS) $(SOURCES) -o $@
  259.  
  260. clean:
  261. 	rm -f ddwrtcg
  262.  
  263.  
Runtime error #stdin #stdout 0.32s 213696KB
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F1AC9AEE23895DC2AEC2087E4182CBC0303031383444414434374230A52276FA
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https://ideone.com/AIb2x
language:
JavaScript (rhino 1.7.9)
created:
14 years ago
visibility:
public

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