Merge pull request #200 from libtom/cast-cleanup

remove unnecessary size_t casts, fix Wconversion/Wsign-conversion issues

Author: sjaeckel

bn_mp_get_long.c

@@ -23,7 +23,7 @@ unsigned long mp_get_long(const mp_int *a)
    }
 
    /* get number of digits of the lsb we have to read */
-   i = MIN(a->used, ((((int)sizeof(unsigned long) * CHAR_BIT) + DIGIT_BIT - 1) / DIGIT_BIT)) - 1;
+   i = MIN(a->used, (((CHAR_BIT * (int)sizeof(unsigned long)) + DIGIT_BIT - 1) / DIGIT_BIT)) - 1;
 
    /* get most significant digit of result */
    res = (unsigned long)a->dp[i];

bn_mp_get_long_long.c

@@ -23,7 +23,7 @@ unsigned long long mp_get_long_long(const mp_int *a)
    }
 
    /* get number of digits of the lsb we have to read */
-   i = MIN(a->used, ((((int)sizeof(unsigned long long) * CHAR_BIT) + DIGIT_BIT - 1) / DIGIT_BIT)) - 1;
+   i = MIN(a->used, (((CHAR_BIT * (int)sizeof(unsigned long long)) + DIGIT_BIT - 1) / DIGIT_BIT)) - 1;
 
    /* get most significant digit of result */
    res = (unsigned long long)a->dp[i];

bn_mp_grow.c

@@ -29,7 +29,7 @@ int mp_grow(mp_int *a, int size)
        * in case the operation failed we don't want
        * to overwrite the dp member of a.
        */
-      tmp = (mp_digit *) XREALLOC(a->dp, sizeof(mp_digit) * (size_t)size);
+      tmp = (mp_digit *) XREALLOC(a->dp, (size_t)size * sizeof(mp_digit));
       if (tmp == NULL) {
          /* reallocation failed but "a" is still valid [can be freed] */
          return MP_MEM;

bn_mp_init.c

@@ -18,7 +18,7 @@ int mp_init(mp_int *a)
    int i;
 
    /* allocate memory required and clear it */
-   a->dp = (mp_digit *) XMALLOC(sizeof(mp_digit) * (size_t)MP_PREC);
+   a->dp = (mp_digit *) XMALLOC(MP_PREC * sizeof(mp_digit));
    if (a->dp == NULL) {
       return MP_MEM;
    }

bn_mp_init_size.c

@@ -21,7 +21,7 @@ int mp_init_size(mp_int *a, int size)
    size += (MP_PREC * 2) - (size % MP_PREC);
 
    /* alloc mem */
-   a->dp = (mp_digit *) XMALLOC(sizeof(mp_digit) * (size_t)size);
+   a->dp = (mp_digit *) XMALLOC((size_t)size * sizeof(mp_digit));
    if (a->dp == NULL) {
       return MP_MEM;
    }

bn_mp_montgomery_reduce.c

@@ -28,7 +28,7 @@ int mp_montgomery_reduce(mp_int *x, const mp_int *n, mp_digit rho)
    if ((digs < (int)MP_WARRAY) &&
        (x->used <= (int)MP_WARRAY) &&
        (n->used <
-        (int)(1u << (((size_t)CHAR_BIT * sizeof(mp_word)) - (2u * (size_t)DIGIT_BIT))))) {
+        (int)(1u << ((CHAR_BIT * sizeof(mp_word)) - (2u * (size_t)DIGIT_BIT))))) {
       return fast_mp_montgomery_reduce(x, n, rho);
    }
 

bn_mp_mul.c

@@ -42,7 +42,7 @@ int mp_mul(const mp_int *a, const mp_int *b, mp_int *c)
 #ifdef BN_FAST_S_MP_MUL_DIGS_C
          if ((digs < (int)MP_WARRAY) &&
              (MIN(a->used, b->used) <=
-              (int)(1u << (((size_t)CHAR_BIT * sizeof(mp_word)) - (2u * (size_t)DIGIT_BIT))))) {
+              (int)(1u << ((CHAR_BIT * sizeof(mp_word)) - (2u * (size_t)DIGIT_BIT))))) {
             res = fast_s_mp_mul_digs(a, b, c, digs);
          } else
 #endif

bn_mp_prime_is_prime.c

@@ -300,7 +300,7 @@ int mp_prime_is_prime(const mp_int *a, int t, int *result)
             if ((err = mp_rand(&b, 1)) != MP_OKAY) {
                goto LBL_B;
             }
-            fips_rand <<= sizeof(mp_digit) * CHAR_BIT;
+            fips_rand <<= CHAR_BIT * sizeof(mp_digit);
             fips_rand |= (unsigned int) b.dp[0];
             fips_rand &= mask;
          }

bn_mp_prime_random_ex.c

@@ -52,13 +52,13 @@ int mp_prime_random_ex(mp_int *a, int t, int size, int flags, ltm_prime_callback
    }
 
    /* calc the maskAND value for the MSbyte*/
-   maskAND = ((size&7) == 0) ? 0xFF : (0xFF >> (8 - (size & 7)));
+   maskAND = ((size&7) == 0) ? 0xFF : (unsigned char)(0xFF >> (8 - (size & 7)));
 
    /* calc the maskOR_msb */
    maskOR_msb        = 0;
    maskOR_msb_offset = ((size & 7) == 1) ? 1 : 0;
    if ((flags & LTM_PRIME_2MSB_ON) != 0) {
-      maskOR_msb       |= 0x80 >> ((9 - size) & 7);
+      maskOR_msb       |= (unsigned char)(0x80 >> ((9 - size) & 7));
    }
 
    /* get the maskOR_lsb */
@@ -76,7 +76,7 @@ int mp_prime_random_ex(mp_int *a, int t, int size, int flags, ltm_prime_callback
 
       /* work over the MSbyte */
       tmp[0]    &= maskAND;
-      tmp[0]    |= 1 << ((size - 1) & 7);
+      tmp[0]    |= (unsigned char)(1 << ((size - 1) & 7));
 
       /* mix in the maskORs */
       tmp[maskOR_msb_offset]   |= maskOR_msb;

bn_mp_rand.c

@@ -86,7 +86,7 @@ static int s_read_win_csp(mp_digit *p)
 
 static int s_read_getrandom(mp_digit *p)
 {
-   int ret;
+   ssize_t ret;
    do {
       ret = getrandom(p, sizeof(*p), 0);
    } while ((ret == -1) && (errno == EINTR));