From 249866e3d1e11dc72eaa1305f4bb479ded92ef38 Mon Sep 17 00:00:00 2001 From: Jannis Hoffmann Date: Tue, 9 Jul 2024 13:58:20 +0200 Subject: reorganized file structure Moved c files into src/. Corrected VERSION file. Removed BUILD and FILES. --- dnsstub/dns_random.c | 70 ---------------------------------------------------- 1 file changed, 70 deletions(-) delete mode 100644 dnsstub/dns_random.c (limited to 'dnsstub/dns_random.c') diff --git a/dnsstub/dns_random.c b/dnsstub/dns_random.c deleted file mode 100644 index 200cd6c..0000000 --- a/dnsstub/dns_random.c +++ /dev/null @@ -1,70 +0,0 @@ -#include -#include "taia.h" -#include "uint_t.h" -#include "dnsresolv.h" - -/** - @file dns_random.c - @author djb - @source ucspi-tcp - @brief random use of DNS resolvers given their IP -*/ - -static uint32 seed[32]; -static uint32 in[12]; -static uint32 out[8]; -static int outleft = 0; - -#define ROTATE(x,b) (((x) << (b)) | ((x) >> (32 - (b)))) -#define MUSH(i,b) x = t[i] += (((x ^ seed[i]) + sum) ^ ROTATE(x,b)); - -static void surf(void) -{ - uint32 t[12]; uint32 x; uint32 sum = 0; - int r; int i; int loop; - - for (i = 0; i < 12; ++i) t[i] = in[i] ^ seed[12 + i]; - for (i = 0; i < 8; ++i) out[i] = seed[24 + i]; - x = t[11]; - for (loop = 0; loop < 2; ++loop) { - for (r = 0; r < 16; ++r) { - sum += 0x9e3779b9; - MUSH(0,5) MUSH(1,7) MUSH(2,9) MUSH(3,13) - MUSH(4,5) MUSH(5,7) MUSH(6,9) MUSH(7,13) - MUSH(8,5) MUSH(9,7) MUSH(10,9) MUSH(11,13) - } - for (i = 0; i < 8; ++i) out[i] ^= t[i + 4]; - } -} - -void dns_random_init(const char data[128]) -{ - int i; - struct taia t; - char tpack[16]; - - for (i = 0; i < 32; ++i) - uint32_unpack((char *)data + 4 * i,seed + i); - - taia_now(&t); - taia_pack(tpack,&t); - for (i = 0; i < 4; ++i) - uint32_unpack(tpack + 4 * i,in + 4 + i); - - in[8] = getpid(); - in[9] = getppid(); - /* more space in 10 and 11, but this is probably enough */ -} - -unsigned int dns_random(unsigned int n) -{ - if (!n) return 0; - - if (!outleft) { - if (!++in[0]) if (!++in[1]) if (!++in[2]) ++in[3]; - surf(); - outleft = 8; - } - - return out[--outleft] % n; -} -- cgit v1.2.3