Fix SRP client key computation

Signed-off-by: Kurt Roeckx <kurt@roeckx.be>
Reviewed-by: Matt Caswell <matt@openssl.org>
GH: #1017
(cherry picked from commit c9141a43e246d527ec8b5a97b98e93fc31b0f0b8)

diff --git a/crypto/srp/srp_lib.c b/crypto/srp/srp_lib.c
index e9a2e058f687740aa2d251f24e3551c49ffc7024..b3e5fbbb8f502054e3be1a0184fd187085aaea84 100644 (file)
--- a/crypto/srp/srp_lib.c
+++ b/crypto/srp/srp_lib.c
@@ -279,9 +279,9 @@ BIGNUM *SRP_Calc_client_key(BIGNUM *N, BIGNUM *B, BIGNUM *g, BIGNUM *x,
     if (!BN_mod_sub(tmp, B, tmp2, N, bn_ctx))
         goto err;
 
-    if (!BN_mod_mul(tmp3, u, x, N, bn_ctx))
+    if (!BN_mul(tmp3, u, x, bn_ctx))
         goto err;
-    if (!BN_mod_add(tmp2, a, tmp3, N, bn_ctx))
+    if (!BN_add(tmp2, a, tmp3))
         goto err;
     if (!BN_mod_exp(K, tmp, tmp2, N, bn_ctx))
         goto err;