From 0216cc1beed7bf225771ae2c6610251c1855bb67 Mon Sep 17 00:00:00 2001
From: Paul Bakker <p.j.bakker@polarssl.org>
Date: Sat, 26 Mar 2011 13:40:23 +0000
Subject: [PATCH]  - Added flag to disable Chinese Remainder Theorem when using
 RSA private operation (POLARSSL_RSA_NO_CRT)

---
 include/polarssl/config.h | 10 ++++++++++
 library/rsa.c             |  2 +-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/include/polarssl/config.h b/include/polarssl/config.h
index f248bdc84..09807fa77 100644
--- a/include/polarssl/config.h
+++ b/include/polarssl/config.h
@@ -143,6 +143,16 @@
  *
 #define POLARSSL_AES_ROM_TABLES
  */
+
+/**
+ * \def POLARSSL_RSA_NO_CRT
+ *
+ * Do not use the Chinese Remainder Theorem for the RSA private operation.
+ *
+ * Uncomment this macro to disable the use of CRT in RSA.
+ *
+#define POLARSSL_RSA_NO_CRT
+ */
 /* \} name */
 
 /**
diff --git a/library/rsa.c b/library/rsa.c
index 0a6c490f0..a0f750ea2 100644
--- a/library/rsa.c
+++ b/library/rsa.c
@@ -253,7 +253,7 @@ int rsa_private( rsa_context *ctx,
         return( POLARSSL_ERR_RSA_BAD_INPUT_DATA );
     }
 
-#if 0
+#if defined(POLARSSL_RSA_NO_CRT)
     MPI_CHK( mpi_exp_mod( &T, &T, &ctx->D, &ctx->N, &ctx->RN ) );
 #else
     /*