math descriptor: add parameter "b" to isprime()

src/math/gmp_desc.c

@@ -442,11 +442,14 @@ static int exptmod(void *a, void *b, void *c, void *d)
    return CRYPT_OK;
 }
 
-static int isprime(void *a, int *b)
+static int isprime(void *a, int b, int *c)
 {
    LTC_ARGCHK(a != NULL);
-   LTC_ARGCHK(b != NULL);
-   *b = mpz_probab_prime_p(a, 8) > 0 ? LTC_MP_YES : LTC_MP_NO;
+   LTC_ARGCHK(c != NULL);
+   if (b == 0) {
+       b = 8;
+   } /* if */
+   *c = mpz_probab_prime_p(a, b) > 0 ? LTC_MP_YES : LTC_MP_NO;
    return CRYPT_OK;
 }
 

src/math/ltm_desc.c

@@ -400,13 +400,16 @@ static int exptmod(void *a, void *b, void *c, void *d)
    return mpi_to_ltc_error(mp_exptmod(a,b,c,d));
 }
 
-static int isprime(void *a, int *b)
+static int isprime(void *a, int b, int *c)
 {
    int err;
    LTC_ARGCHK(a != NULL);
-   LTC_ARGCHK(b != NULL);
-   err = mpi_to_ltc_error(mp_prime_is_prime(a, 8, b));
-   *b = (*b == MP_YES) ? LTC_MP_YES : LTC_MP_NO;
+   LTC_ARGCHK(c != NULL);
+   if (b == 0) {
+       b = 8;
+   } /* if */
+   err = mpi_to_ltc_error(mp_prime_is_prime(a, b, c));
+   *c = (*c == MP_YES) ? LTC_MP_YES : LTC_MP_NO;
    return err;
 }
 

src/math/tfm_desc.c

@@ -413,11 +413,12 @@ static int exptmod(void *a, void *b, void *c, void *d)
    return tfm_to_ltc_error(fp_exptmod(a,b,c,d));
 }
 
-static int isprime(void *a, int *b)
+static int isprime(void *a, int b, int *c)
 {
    LTC_ARGCHK(a != NULL);
-   LTC_ARGCHK(b != NULL);
-   *b = (fp_isprime(a) == FP_YES) ? LTC_MP_YES : LTC_MP_NO;
+   LTC_ARGCHK(c != NULL);
+   (void)b;
+   *c = (fp_isprime(a) == FP_YES) ? LTC_MP_YES : LTC_MP_NO;
    return CRYPT_OK;
 }