From 6767646e548da9f6578fa0954c843aa267f227c8 Mon Sep 17 00:00:00 2001
From: Takashi Kojo <kojo@wolfssl.com>
Date: Tue, 20 Oct 2020 19:11:35 +0900
Subject: [PATCH] set tag for zero len case

---
 wolfcrypt/src/evp.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/wolfcrypt/src/evp.c b/wolfcrypt/src/evp.c
index fb859d41a..8477434e7 100644
--- a/wolfcrypt/src/evp.c
+++ b/wolfcrypt/src/evp.c
@@ -624,9 +624,6 @@ WOLFSSL_API int wolfSSL_EVP_CipherUpdate(WOLFSSL_EVP_CIPHER_CTX *ctx,
     }
 
     *outl = 0;
-    if (inl == 0) {
-        return WOLFSSL_SUCCESS;
-    }
 
 #if !defined(NO_AES) && defined(HAVE_AESGCM)
         switch (ctx->cipherType) {
@@ -645,7 +642,10 @@ WOLFSSL_API int wolfSSL_EVP_CipherUpdate(WOLFSSL_EVP_CIPHER_CTX *ctx,
         return WOLFSSL_FAILURE;
     }
 
-
+    /* if(inl == 0)wolfSSL_EVP_CipherUpdate_GCM to get tag */ 
+    if (inl == 0) {
+        return WOLFSSL_SUCCESS;
+    }
     if (ctx->bufUsed > 0) { /* concatenate them if there is anything */
         fill = fillBuff(ctx, in, inl);
         inl -= fill;