fix comment

Author: sjaeckel

src/pk/rsa/rsa_make_key.c

@@ -78,8 +78,8 @@ int rsa_make_key(prng_state *prng, int wprng, int size, long e, rsa_key *key)
 
    /* optimize for CRT now */
    /* find d mod q-1 and d mod p-1 */
-   if ((err = mp_sub_d( p, 1,  tmp1)) != CRYPT_OK)                     { goto errkey; } /* tmp1 = q-1 */
-   if ((err = mp_sub_d( q, 1,  tmp2)) != CRYPT_OK)                     { goto errkey; } /* tmp2 = p-1 */
+   if ((err = mp_sub_d( p, 1,  tmp1)) != CRYPT_OK)                     { goto errkey; } /* tmp1 = p-1 */
+   if ((err = mp_sub_d( q, 1,  tmp2)) != CRYPT_OK)                     { goto errkey; } /* tmp2 = q-1 */
    if ((err = mp_mod( key->d,  tmp1,  key->dP)) != CRYPT_OK)           { goto errkey; } /* dP = d mod p-1 */
    if ((err = mp_mod( key->d,  tmp2,  key->dQ)) != CRYPT_OK)           { goto errkey; } /* dQ = d mod q-1 */
    if ((err = mp_invmod( q,  p,  key->qP)) != CRYPT_OK)                { goto errkey; } /* qP = 1/q mod p */