From eda800f478a914ecf27442da2e8ef764992ef995 Mon Sep 17 00:00:00 2001
From: Azim Khan <Azim.Khan@arm.com>
Date: Wed, 21 Feb 2018 10:39:44 +0000
Subject: [PATCH] Specify signature buffer length properly

---
 programs/x509/cert_write.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/programs/x509/cert_write.c b/programs/x509/cert_write.c
index 0266cdadd..075ceb205 100644
--- a/programs/x509/cert_write.c
+++ b/programs/x509/cert_write.c
@@ -554,7 +554,7 @@ static int remote_sign_func(void *ctx, mbedtls_md_type_t md_alg,
     offset += hash_len;
 
     if( serial_xfer( remote_ctx->serial_port, func_buffer, offset, sig,
-                     100/* FIXME */, sig_len ) != 0 )
+                     MBEDTLS_ECDSA_MAX_SIG_LEN(256), sig_len ) != 0 )
     {
         mbedtls_printf( " failed\n  !  Serial error in signing\n\n" );
         return( -1 );