commit fd56f409b3c3d864c545957600df662fe0679c2e
author Andrzej Kurek <andrzej.kurek@arm.com> Mon May 25 11:52:05 2020 -0400
committer Andrzej Kurek <andrzej.kurek@arm.com> Fri Jun 05 12:26:07 2020 -0400
tree 60e7e6393de887d223b9c521608319419478d555
parent 2d21e3e47b93e7f3722c04d4e92d2d0b8e9be735

Change the default value of status variables to an error


Signed-off-by: Andrzej Kurek <andrzej.kurek@arm.com>

library/hmac_drbg.c

diff --git a/library/hmac_drbg.c b/library/hmac_drbg.c
index dd895be..d197f24 100644
--- a/library/hmac_drbg.c
+++ b/library/hmac_drbg.c
@@ -199,7 +199,7 @@
     unsigned char seed[MBEDTLS_HMAC_DRBG_MAX_SEED_INPUT];
     size_t seedlen = 0;
     size_t total_entropy_len;
-    int ret;
+    int ret = MBEDTLS_ERR_PLATFORM_FAULT_DETECTED;
 
     if( use_nonce == HMAC_NONCE_NO )
         total_entropy_len = ctx->entropy_len;
@@ -298,7 +298,7 @@
                     const unsigned char *custom,
                     size_t len )
 {
-    int ret;
+    int ret = MBEDTLS_ERR_PLATFORM_FAULT_DETECTED;
     size_t md_size;
 
     if( ( ret = mbedtls_md_setup( &ctx->md_ctx, md_info, 1 ) ) != 0 )
@@ -375,7 +375,7 @@
                                unsigned char *output, size_t out_len,
                                const unsigned char *additional, size_t add_len )
 {
-    int ret;
+    int ret = MBEDTLS_ERR_PLATFORM_FAULT_DETECTED;
     volatile unsigned char *output_fi = output;
     volatile size_t out_len_fi = out_len;
     mbedtls_hmac_drbg_context *ctx = (mbedtls_hmac_drbg_context *) p_rng;
@@ -461,7 +461,7 @@
  */
 int mbedtls_hmac_drbg_random( void *p_rng, unsigned char *output, size_t out_len )
 {
-    int ret;
+    int ret = MBEDTLS_ERR_PLATFORM_FAULT_DETECTED;
     mbedtls_hmac_drbg_context *ctx = (mbedtls_hmac_drbg_context *) p_rng;
 
 #if defined(MBEDTLS_THREADING_C)