Hi all Just tried to compile a c code which i downloaded from net for my project getting an error with it . Code is too big to copy paste gcc test.c /usr/lib/gcc/i586-suse-linux/4.1.2/../../../crt1.o: In function `_start': (.text+0x18): undefined reference to `main' collect2: ld returned 1 exit status Any help ll be appreciated
I am adding the code ------------------------------- ----------------------start---------------------------------------------------------------------------- Code: /* An implementation of the GSM A3A8 algorithm. (Specifically, COMP128.) */ /* Copyright 1998, Marc Briceno, Ian Goldberg, and David Wagner. * All rights reserved. */ /* * For expository purposes only. Coded in C merely because C is a much * more precise, concise form of expression for these purposes. See Judge * Patel if you have any problems with this... * Of course, it's only authentication, so it should be exportable for the * usual boring reasons. */ typedef unsigned char Byte; #include <stdio.h> /* #define TEST */ /* * rand[0..15]: the challenge from the base station * key[0..15]: the SIM's A3/A8 long-term key Ki * simoutput[0..11]: what you'd get back if you fed rand and key to a real * SIM. * * The GSM spec states that simoutput[0..3] is SRES, * and simoutput[4..11] is Kc (the A5 session key). * (See GSM 11.11, Section 8.16. See also the leaked document * referenced below.) * Note that Kc is bits 74..127 of the COMP128 output, followed by 10 * zeros. * In other words, A5 is keyed with only 54 bits of entropy. This * represents a deliberate weakening of the key used for voice privacy * by a factor of over 1000. * * Verified with a Pacific Bell Schlumberger SIM. Your mileage may vary. * * Marc Briceno <marc@scard.org>, Ian Goldberg <iang@cs.berkeley.edu>, * and David Wagner <daw@cs.berkeley.edu> */ void A3A8(/* in */ Byte rand[16], /* in */ Byte key[16], /* out */ Byte simoutput[12]); /* The compression tables. */ static const Byte table_0[512] = { 102,177,186,162, 2,156,112, 75, 55, 25, 8, 12,251,193,246,188, 109,213,151, 53, 42, 79,191,115,233,242,164,223,209,148,108,161, 252, 37,244, 47, 64,211, 6,237,185,160,139,113, 76,138, 59, 70, 67, 26, 13,157, 63,179,221, 30,214, 36,166, 69,152,124,207,116, 247,194, 41, 84, 71, 1, 49, 14, 95, 35,169, 21, 96, 78,215,225, 182,243, 28, 92,201,118, 4, 74,248,128, 17, 11,146,132,245, 48, 149, 90,120, 39, 87,230,106,232,175, 19,126,190,202,141,137,176, 250, 27,101, 40,219,227, 58, 20, 51,178, 98,216,140, 22, 32,121, 61,103,203, 72, 29,110, 85,212,180,204,150,183, 15, 66,172,196, 56,197,158, 0,100, 45,153, 7,144,222,163,167, 60,135,210,231, 174,165, 38,249,224, 34,220,229,217,208,241, 68,206,189,125,255, 239, 54,168, 89,123,122, 73,145,117,234,143, 99,129,200,192, 82, 104,170,136,235, 93, 81,205,173,236, 94,105, 52, 46,228,198, 5, 57,254, 97,155,142,133,199,171,187, 50, 65,181,127,107,147,226, 184,218,131, 33, 77, 86, 31, 44, 88, 62,238, 18, 24, 43,154, 23, 80,159,134,111, 9,114, 3, 91, 16,130, 83, 10,195,240,253,119, 177,102,162,186,156, 2, 75,112, 25, 55, 12, 8,193,251,188,246, 213,109, 53,151, 79, 42,115,191,242,233,223,164,148,209,161,108, 37,252, 47,244,211, 64,237, 6,160,185,113,139,138, 76, 70, 59, 26, 67,157, 13,179, 63, 30,221, 36,214, 69,166,124,152,116,207, 194,247, 84, 41, 1, 71, 14, 49, 35, 95, 21,169, 78, 96,225,215, 243,182, 92, 28,118,201, 74, 4,128,248, 11, 17,132,146, 48,245, 90,149, 39,120,230, 87,232,106, 19,175,190,126,141,202,176,137, 27,250, 40,101,227,219, 20, 58,178, 51,216, 98, 22,140,121, 32, 103, 61, 72,203,110, 29,212, 85,204,180,183,150, 66, 15,196,172, 197, 56, 0,158, 45,100, 7,153,222,144,167,163,135, 60,231,210, 165,174,249, 38, 34,224,229,220,208,217, 68,241,189,206,255,125, 54,239, 89,168,122,123,145, 73,234,117, 99,143,200,129, 82,192, 170,104,235,136, 81, 93,173,205, 94,236, 52,105,228, 46, 5,198, 254, 57,155, 97,133,142,171,199, 50,187,181, 65,107,127,226,147, 218,184, 33,131, 86, 77, 44, 31, 62, 88, 18,238, 43, 24, 23,154, 159, 80,111,134,114, 9, 91, 3,130, 16, 10, 83,240,195,119,253 }, table_1[256] = { 19, 11, 80,114, 43, 1, 69, 94, 39, 18,127,117, 97, 3, 85, 43, 27,124, 70, 83, 47, 71, 63, 10, 47, 89, 79, 4, 14, 59, 11, 5, 35,107,103, 68, 21, 86, 36, 91, 85,126, 32, 50,109, 94,120, 6, 53, 79, 28, 45, 99, 95, 41, 34, 88, 68, 93, 55,110,125,105, 20, 90, 80, 76, 96, 23, 60, 89, 64,121, 56, 14, 74,101, 8, 19, 78, 76, 66,104, 46,111, 50, 32, 3, 39, 0, 58, 25, 92, 22, 18, 51, 57, 65,119,116, 22,109, 7, 86, 59, 93, 62,110, 78, 99, 77, 67, 12,113, 87, 98,102, 5, 88, 33, 38, 56, 23, 8, 75, 45, 13, 75, 95, 63, 28, 49,123,120, 20,112, 44, 30, 15, 98,106, 2,103, 29, 82,107, 42,124, 24, 30, 41, 16,108,100,117, 40, 73, 40, 7,114, 82,115, 36,112, 12,102,100, 84, 92, 48, 72, 97, 9, 54, 55, 74, 113,123, 17, 26, 53, 58, 4, 9, 69,122, 21,118, 42, 60, 27, 73, 118,125, 34, 15, 65,115, 84, 64, 62, 81, 70, 1, 24,111,121, 83, 104, 81, 49,127, 48,105, 31, 10, 6, 91, 87, 37, 16, 54,116,126, 31, 38, 13, 0, 72,106, 77, 61, 26, 67, 46, 29, 96, 37, 61, 52, 101, 17, 44,108, 71, 52, 66, 57, 33, 51, 25, 90, 2,119,122, 35 }, table_2[128] = { 52, 50, 44, 6, 21, 49, 41, 59, 39, 51, 25, 32, 51, 47, 52, 43, 37, 4, 40, 34, 61, 12, 28, 4, 58, 23, 8, 15, 12, 22, 9, 18, 55, 10, 33, 35, 50, 1, 43, 3, 57, 13, 62, 14, 7, 42, 44, 59, 62, 57, 27, 6, 8, 31, 26, 54, 41, 22, 45, 20, 39, 3, 16, 56, 48, 2, 21, 28, 36, 42, 60, 33, 34, 18, 0, 11, 24, 10, 17, 61, 29, 14, 45, 26, 55, 46, 11, 17, 54, 46, 9, 24, 30, 60, 32, 0, 20, 38, 2, 30, 58, 35, 1, 16, 56, 40, 23, 48, 13, 19, 19, 27, 31, 53, 47, 38, 63, 15, 49, 5, 37, 53, 25, 36, 63, 29, 5, 7 }, table_3[64] = { 1, 5, 29, 6, 25, 1, 18, 23, 17, 19, 0, 9, 24, 25, 6, 31, 28, 20, 24, 30, 4, 27, 3, 13, 15, 16, 14, 18, 4, 3, 8, 9, 20, 0, 12, 26, 21, 8, 28, 2, 29, 2, 15, 7, 11, 22, 14, 10, 17, 21, 12, 30, 26, 27, 16, 31, 11, 7, 13, 23, 10, 5, 22, 19 }, table_4[32] = { 15, 12, 10, 4, 1, 14, 11, 7, 5, 0, 14, 7, 1, 2, 13, 8, 10, 3, 4, 9, 6, 0, 3, 2, 5, 6, 8, 9, 11, 13, 15, 12 }, *table[5] = { table_0, table_1, table_2, table_3, table_4 }; /* * This code derived from a leaked document from the GSM standards. * Some missing pieces were filled in by reverse-engineering a working SIM. * We have verified that this is the correct COMP128 algorithm. * * The first page of the document identifies it as * _Technical Information: GSM System Security Study_. * 10-1617-01, 10th June 1988. * The bottom of the title page is marked * Racal Research Ltd. * Worton Drive, Worton Grange Industrial Estate, * Reading, Berks. RG2 0SB, England. * Telephone: Reading (0734) 868601 Telex: 847152 * The relevant bits are in Part I, Section 20 (pages 66--67). Enjoy! * * Note: There are three typos in the spec (discovered by * reverse-engineering). * First, "z = (2 * x[n] + x[n]) mod 2^(9-j)" should clearly read * "z = (2 * x[m] + x[n]) mod 2^(9-j)". * Second, the "k" loop in the "Form bits from bytes" section is severely * botched: the k index should run only from 0 to 3, and clearly the range * on "the (8-k)th bit of byte j" is also off (should be 0..7, not 1..8, * to be consistent with the subsequent section). * Third, SRES is taken from the first 8 nibbles of x[], not the last 8 as * claimed in the document. (And the document doesn't specify how Kc is * derived, but that was also easily discovered with reverse engineering.) * All of these typos have been corrected in the following code. */ void A3A8(/* in */ Byte rand[16], /* in */ Byte key[16], /* out */ Byte simoutput[12]) { Byte x[32], bit[128]; int i, j, k, l, m, n, y, z, next_bit; /* ( Load RAND into last 16 bytes of input ) */ for (i=16; i<32; i++) x[i] = rand[i-16]; /* ( Loop eight times ) */ for (i=1; i<9; i++) { /* ( Load key into first 16 bytes of input ) */ for (j=0; j<16; j++) x[j] = key[j]; /* ( Perform substitutions ) */ for (j=0; j<5; j++) for (k=0; k<(1<<j); k++) for (l=0; l<(1<<(4-j)); l++) { m = l + k*(1<<(5-j)); n = m + (1<<(4-j)); y = (x[m]+2*x[n]) % (1<<(9-j)); z = (2*x[m]+x[n]) % (1<<(9-j)); x[m] = table[j][y]; x[n] = table[j][z]; } /* ( Form bits from bytes ) */ for (j=0; j<32; j++) for (k=0; k<4; k++) bit[4*j+k] = (x[j]>>(3-k)) & 1; /* ( Permutation but not on the last loop ) */ if (i < 8) for (j=0; j<16; j++) { x[j+16] = 0; for (k=0; k<8; k++) { next_bit = ((8*j + k)*17) % 128; x[j+16] |= bit[next_bit] << (7-k); } } } /* * ( At this stage the vector x[] consists of 32 nibbles. * The first 8 of these are taken as the output SRES. ) */ /* The remainder of the code is not given explicitly in the * standard, but was derived by reverse-engineering. */ for (i=0; i<4; i++) simoutput[i] = (x[2*i]<<4) | x[2*i+1]; for (i=0; i<6; i++) simoutput[4+i] = (x[2*i+18]<<6) | (x[2*i+18+1]<<2) | (x[2*i+18+2]>>2); simoutput[4+6] = (x[2*6+18]<<6) | (x[2*6+18+1]<<2); simoutput[4+7] = 0; } #ifdef TEST int hextoint(char x) { x = toupper(x); if (x >= 'A' && x <= 'F') return x-'A'+10; else if (x >= '0' && x <= '9') return x-'0'; fprintf(stderr, "bad input.\n"); exit(1); } int main(int argc, char **argv) { Byte key[16], rand[16], simoutput[12]; int i; if (argc != 3 || strlen(argv[1]) != 34 || strlen(argv[2]) != 34 || strncmp(argv[1], "0x", 2) != 0 || strncmp(argv[2], "0x", 2) != 0) { fprintf(stderr, "Usage: %s 0x<key> 0x<rand>\n", argv[0]); exit(1); } for (i=0; i<16; i++) key[i] = (hextoint(argv[1][2*i+2])<<4) | hextoint(argv[1][2*i+3]); for (i=0; i<16; i++) rand[i] = (hextoint(argv[2][2*i+2])<<4) | hextoint(argv[2][2*i+3]); A3A8(key, rand, simoutput); printf("simoutput: "); for (i=0; i<12; i++) printf("%02X", simoutput[i]); printf("\n"); return 0; } #endif ------------------------**--END --------------------------------------------------- root: ~/punith #
hi punith try this " sudo apt-cdrom add sudo apt-get install build-essential sudo apt-get install libc6-dev" this'll solve ur prob!!!!
That won't solve his problem unless he uncomments #define TEST. The main function follows a preprocessor directive, #ifdef TEST, that will prevent the main function (and other functions in that block) from being submitted to the compiler.
