- if (!BN_mod(r1,I,rsa->q,ctx)) goto err;
- if (!(rsa->flags & RSA_FLAG_NO_EXP_CONSTTIME))
+ BN_init(&local_q);
+ q = &local_q;
+ BN_with_flags(q, rsa->q, BN_FLG_CONSTTIME);
+ }
+ else
+ {
+ p = rsa->p;
+ q = rsa->q;
+ }
+
+ if (rsa->flags & RSA_FLAG_CACHE_PRIVATE)
+ {
+ if (!BN_MONT_CTX_set_locked(&rsa->_method_mod_p, CRYPTO_LOCK_RSA, p, ctx))
+ goto err;
+ if (!BN_MONT_CTX_set_locked(&rsa->_method_mod_q, CRYPTO_LOCK_RSA, q, ctx))
+ goto err;
+ }
+ }
+
+ if (rsa->flags & RSA_FLAG_CACHE_PUBLIC)
+ if (!BN_MONT_CTX_set_locked(&rsa->_method_mod_n, CRYPTO_LOCK_RSA, rsa->n, ctx))
+ goto err;
+
+ /* compute I mod q */
+ if (!(rsa->flags & RSA_FLAG_NO_CONSTTIME))
+ {
+ c = &local_c;
+ BN_with_flags(c, I, BN_FLG_CONSTTIME);
+ if (!BN_mod(r1,c,rsa->q,ctx)) goto err;
+ }
+ else
+ {
+ if (!BN_mod(r1,I,rsa->q,ctx)) goto err;
+ }
+
+ /* compute r1^dmq1 mod q */
+ if (!(rsa->flags & RSA_FLAG_NO_CONSTTIME))