gmp: Fix compatibility with older libgmp releases

Older releases don't have mpz_powm_sec() and mpz_inits() yet.

Fixes #2505.

diff --git a/src/libstrongswan/plugins/gmp/gmp_rsa_private_key.c b/src/libstrongswan/plugins/gmp/gmp_rsa_private_key.c
index aca232c8654058def83c322769d0f01463896937..241ef7d3b12beda532810c2b0f00d0266ebb8198 100644 (file)
--- a/src/libstrongswan/plugins/gmp/gmp_rsa_private_key.c
+++ b/src/libstrongswan/plugins/gmp/gmp_rsa_private_key.c
@@ -936,7 +936,12 @@ static bool calculate_pq(private_gmp_rsa_private_key_t *this)
        bool success = FALSE;
 
        gmp_randinit_default(rstate);
-       mpz_inits(k, r, g, y, n1, x, NULL);
+       mpz_init(k);
+       mpz_init(r);
+       mpz_init(g);
+       mpz_init(y);
+       mpz_init(n1);
+       mpz_init(x);
        /* k = (d * e) - 1 */
        mpz_mul(k, *this->d, this->e);
        mpz_sub_ui(k, k, 1);
@@ -956,7 +961,7 @@ static bool calculate_pq(private_gmp_rsa_private_key_t *this)
        {       /* generate random integer g in [0, n-1] */
                mpz_urandomm(g, rstate, this->n);
                /* y = g^r mod n */
-               mpz_powm_sec(y, g, r, this->n);
+               mpz_powm(y, g, r, this->n);
                /* try again if y == 1 or y == n-1 */
                if (mpz_cmp_ui(y, 1) == 0 || mpz_cmp(y, n1) == 0)
                {