From ad6cb11461c1b734f328b8638458794c8aea4551 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Manuel=20P=C3=A9gouri=C3=A9-Gonnard?= <mpg@elzevir.fr>
Date: Wed, 17 Jul 2019 14:58:03 +0200
Subject: [PATCH] Declare new config.h option MBEDTLS_SHA512_NO_SHA384

---
 include/mbedtls/config.h     | 10 ++++++++++
 library/version_features.c   |  3 +++
 programs/test/query_config.c |  8 ++++++++
 scripts/config.py            |  1 +
 4 files changed, 22 insertions(+)

diff --git a/include/mbedtls/config.h b/include/mbedtls/config.h
index a4db6ba49..205c7bec7 100644
--- a/include/mbedtls/config.h
+++ b/include/mbedtls/config.h
@@ -1033,6 +1033,16 @@
  */
 //#define MBEDTLS_SHA512_SMALLER
 
+/**
+ * \def MBEDTLS_SHA512_NO_SHA384
+ *
+ * Disable the SHA-384 option of the SHA-512 module. Use this to save some
+ * code size on devices that don't use SHA-384.
+ *
+ * Uncomment to disable SHA-384
+ */
+//#define MBEDTLS_SHA512_NO_SHA384
+
 /**
  * \def MBEDTLS_THREADING_ALT
  *
diff --git a/library/version_features.c b/library/version_features.c
index a91723fcf..e2dc9b152 100644
--- a/library/version_features.c
+++ b/library/version_features.c
@@ -414,6 +414,9 @@ static const char * const features[] = {
 #if defined(MBEDTLS_SHA512_SMALLER)
     "MBEDTLS_SHA512_SMALLER",
 #endif /* MBEDTLS_SHA512_SMALLER */
+#if defined(MBEDTLS_SHA512_NO_SHA384)
+    "MBEDTLS_SHA512_NO_SHA384",
+#endif /* MBEDTLS_SHA512_NO_SHA384 */
 #if defined(MBEDTLS_THREADING_ALT)
     "MBEDTLS_THREADING_ALT",
 #endif /* MBEDTLS_THREADING_ALT */
diff --git a/programs/test/query_config.c b/programs/test/query_config.c
index 1832b2c88..b6cbb09f7 100644
--- a/programs/test/query_config.c
+++ b/programs/test/query_config.c
@@ -1132,6 +1132,14 @@ int query_config( const char *config )
     }
 #endif /* MBEDTLS_SHA512_SMALLER */
 
+#if defined(MBEDTLS_SHA512_NO_SHA384)
+    if( strcmp( "MBEDTLS_SHA512_NO_SHA384", config ) == 0 )
+    {
+        MACRO_EXPANSION_TO_STR( MBEDTLS_SHA512_NO_SHA384 );
+        return( 0 );
+    }
+#endif /* MBEDTLS_SHA512_NO_SHA384 */
+
 #if defined(MBEDTLS_THREADING_ALT)
     if( strcmp( "MBEDTLS_THREADING_ALT", config ) == 0 )
     {
diff --git a/scripts/config.py b/scripts/config.py
index cb0e1c5fe..6d4828a95 100755
--- a/scripts/config.py
+++ b/scripts/config.py
@@ -183,6 +183,7 @@ def include_in_full(name):
             'MBEDTLS_PSA_CRYPTO_SPM',
             'MBEDTLS_PSA_INJECT_ENTROPY',
             'MBEDTLS_RSA_NO_CRT',
+            'MBEDTLS_SHA512_NO_SHA384',
             'MBEDTLS_TEST_NULL_ENTROPY',
     ]:
         return False