bigint looks good but needs more testing

[arm-crypto-lib.git] / bigint / bigint.c

diff --git a/bigint/bigint.c b/bigint/bigint.c
index d7ee059473407006498537c407a0579c62312c73..c133faae826a538325d101f25d6fcdabd3f0e02d 100644 (file)
--- a/bigint/bigint.c
+++ b/bigint/bigint.c
@@ -675,9 +675,9 @@ void bigint_expmod_u(bigint_t* dest, const bigint_t* a, const bigint_t* exp, con
        }
 
        bigint_t res, base;
-       bigint_word_t base_b[MAX(a->length_B,r->length_B*2)], res_b[r->length_B*2];
+       bigint_word_t t, base_b[MAX(a->length_B,r->length_B*2)], res_b[r->length_B*2];
        uint16_t i;
-       uint8_t j, t;
+       uint8_t j;
        res.wordv = res_b;
        base.wordv = base_b;
        bigint_copy(&base, a);
@@ -688,7 +688,7 @@ void bigint_expmod_u(bigint_t* dest, const bigint_t* a, const bigint_t* exp, con
        bigint_adjust(&res);
        for(i=0; i+1<exp->length_B; ++i){
                t=exp->wordv[i];
-               for(j=0; j<8; ++j){
+               for(j=0; j<BIGINT_WORD_SIZE; ++j){
                        if(t&1){
                                bigint_mul_u(&res, &res, &base);
                                bigint_reduce(&res, r);
@@ -738,8 +738,8 @@ void bigint_gcdext(bigint_t* gcd, bigint_t* a, bigint_t* b, const bigint_t* x, c
         x_.info = y_.info = 0;
         x_.length_B = x->length_B-i;
         y_.length_B = y->length_B-i;
-        memcpy(x_.wordv, x->wordv+i, x_.length_B);
-        memcpy(y_.wordv, y->wordv+i, y_.length_B);
+        memcpy(x_.wordv, x->wordv+i, x_.length_B*sizeof(bigint_word_t));
+        memcpy(y_.wordv, y->wordv+i, y_.length_B*sizeof(bigint_word_t));
         for(i=0; (x_.wordv[0]&(1<<i))==0 && (y_.wordv[0]&(1<<i))==0; ++i){
         }