modif pour tp2 (68c8b472) · Commits · Alexander Camatchy / TP Introduction à la sécurité L2

src/bignum.c

+19 −0

Changes for src/bignum.c: 19 added lines, 0 removed lines.
Original line number	Diff line number	Diff line
		#include <stdlib.h>
		#include <stdio.h>
		#include <gmp.h>

		typedef mpz_t* bignum_t;
		@@ -91,6 +92,24 @@ bignum_t bignum_pow(bignum_t x, bignum_t exp){
		return z;
		}

		bignum_t bignum_gcd(bignum_t a, bignum_t b){
		bignum_t g = bignum_zero();
		mpz_gcd(g, a, *b);
		return g;
		}

		bignum_t bignum_from_MD5(unsigned char* md5sum, size_t len){
		char s[100];
		size_t r = 0;
		bignum_t res = bignum_zero();

		for(size_t i = 0; i < len; i++)
		r = r + sprintf(s+r, "%x", md5sum[i]);

		mpz_set_str(*res, s, 16);
		return res;
		}

		char* bignum_to_str(bignum_t x){
		return mpz_get_str(NULL, 10, *x);
		}

+4 −0

Changes for src/bignum.h: 4 added lines, 0 removed lines.
Original line number	Diff line number	Diff line
		@@ -24,5 +24,9 @@ bignum_t bignum_mod(bignum_t, bignum_t);
		bignum_t bignum_powm(bignum_t, bignum_t, bignum_t);
		bignum_t bignum_pow(bignum_t, bignum_t);

		bignum_t bignum_gcd(bignum_t, bignum_t);

		bignum_t bignum_from_MD5(unsigned char* md5sum, size_t len);

		char* bignum_to_str(bignum_t);
		#endif