From b4f71beaf0e375491714b5db33b142e9854fa203 Mon Sep 17 00:00:00 2001
From: Pol Henarejos <pol.henarejos@cttc.es>
Date: Tue, 2 Jan 2024 01:57:55 +0100
Subject: [PATCH] Fix SM verification for long messages.

Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>
---
 src/eac.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/eac.c b/src/eac.c
index 7311c2c..d53d1c7 100644
--- a/src/eac.c
+++ b/src/eac.c
@@ -229,7 +229,7 @@ void sm_update_iv() {
 }
 
 int sm_verify() {
-    uint8_t input[1024];
+    uint8_t input[4096];
     memset(input, 0, sizeof(input));
     uint16_t input_len = 0;
     int r = 0;
@@ -238,7 +238,7 @@ int sm_verify() {
     if (data_len % sm_blocksize) {
         data_len += sm_blocksize;
     }
-    if (data_len + (add_header ? sm_blocksize : 0) > 1024) {
+    if (data_len + (add_header ? sm_blocksize : 0) > 4096) {
         return CCID_WRONG_LENGTH;
     }
     mbedtls_mpi ssc;