From 84a4c677412054dff4b8dd4ffc6e20641f86a287 Mon Sep 17 00:00:00 2001
From: Robert Cragie <Robert.Cragie@arm.com>
Date: Mon, 14 Dec 2015 17:13:29 +0000
Subject: [PATCH] Added CMAC as proper low-level module and changed error
 returns

---
 include/mbedtls/cmac.h     |  4 ++--
 include/mbedtls/error.h    |  1 +
 library/error.c            | 11 +++++++++++
 scripts/generate_errors.pl |  2 +-
 4 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/include/mbedtls/cmac.h b/include/mbedtls/cmac.h
index 08483f685..65017ef5c 100644
--- a/include/mbedtls/cmac.h
+++ b/include/mbedtls/cmac.h
@@ -25,8 +25,8 @@
 
 #include "cipher.h"
 
-#define MBEDTLS_ERR_CMAC_BAD_INPUT      -0x000D /**< Bad input parameters to function. */
-#define MBEDTLS_ERR_CMAC_VERIFY_FAILED  -0x000F /**< Verification failed. */
+#define MBEDTLS_ERR_CMAC_BAD_INPUT      -0x0011 /**< Bad input parameters to function. */
+#define MBEDTLS_ERR_CMAC_VERIFY_FAILED  -0x0013 /**< Verification failed. */
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/include/mbedtls/error.h b/include/mbedtls/error.h
index 5e549f6b6..703233ae9 100644
--- a/include/mbedtls/error.h
+++ b/include/mbedtls/error.h
@@ -66,6 +66,7 @@
  * PBKDF2    1  0x007C-0x007C
  * HMAC_DRBG 4  0x0003-0x0009
  * CCM       2                  0x000D-0x000F
+ * CMAC      2                  0x0011-0x0013
  *
  * High-level module nr (3 bits - 0x0...-0x7...)
  * Name      ID  Nr of Errors
diff --git a/library/error.c b/library/error.c
index 71d4faa70..8c38cf294 100644
--- a/library/error.c
+++ b/library/error.c
@@ -69,6 +69,10 @@
 #include "mbedtls/cipher.h"
 #endif
 
+#if defined(MBEDTLS_CMAC_C)
+#include "mbedtls/cmac.h"
+#endif
+
 #if defined(MBEDTLS_CTR_DRBG_C)
 #include "mbedtls/ctr_drbg.h"
 #endif
@@ -578,6 +582,13 @@ void mbedtls_strerror( int ret, char *buf, size_t buflen )
         mbedtls_snprintf( buf, buflen, "CCM - Authenticated decryption failed" );
 #endif /* MBEDTLS_CCM_C */
 
+#if defined(MBEDTLS_CMAC_C)
+    if( use_ret == -(MBEDTLS_ERR_CMAC_BAD_INPUT) )
+        mbedtls_snprintf( buf, buflen, "CMAC - Bad input parameters to function" );
+    if( use_ret == -(MBEDTLS_ERR_CMAC_VERIFY_FAILED) )
+        mbedtls_snprintf( buf, buflen, "CMAC - Verification failed" );
+#endif /* MBEDTLS_CMAC_C */
+
 #if defined(MBEDTLS_CTR_DRBG_C)
     if( use_ret == -(MBEDTLS_ERR_CTR_DRBG_ENTROPY_SOURCE_FAILED) )
         mbedtls_snprintf( buf, buflen, "CTR_DRBG - The entropy source failed" );
diff --git a/scripts/generate_errors.pl b/scripts/generate_errors.pl
index cfcf07c8f..dd91151d6 100755
--- a/scripts/generate_errors.pl
+++ b/scripts/generate_errors.pl
@@ -33,7 +33,7 @@ my @low_level_modules = ( "AES", "ASN1", "BLOWFISH", "CAMELLIA", "BIGNUM",
                           "BASE64", "XTEA", "PBKDF2", "OID",
                           "PADLOCK", "DES", "NET", "CTR_DRBG", "ENTROPY",
                           "HMAC_DRBG", "MD2", "MD4", "MD5", "RIPEMD160",
-                          "SHA1", "SHA256", "SHA512", "GCM", "THREADING", "CCM" );
+                          "SHA1", "SHA256", "SHA512", "GCM", "THREADING", "CCM", "CMAC" );
 my @high_level_modules = ( "PEM", "X509", "DHM", "RSA", "ECP", "MD", "CIPHER", "SSL",
                            "PK", "PKCS12", "PKCS5" );