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Dependencies: FXOS8700CQ NTPClient azure_umqtt_c iothub_mqtt_transport mbed-rtos mbed wolfSSL Socket lwip-eth lwip-sys lwip
Fork of
FXOS8700CQ_To_Azure_IoT
by 
Mark Radbourne
Diff: azure_c_shared_utility/hmacsha256.c
- Revision:
- 3:c0556ff7b8e3
diff -r 2b9acda15ef0 -r c0556ff7b8e3 azure_c_shared_utility/hmacsha256.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/azure_c_shared_utility/hmacsha256.c Thu Dec 08 00:11:40 2016 +0000
@@ -0,0 +1,40 @@
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+#include <stdlib.h>
+#ifdef _CRTDBG_MAP_ALLOC
+#include <crtdbg.h>
+#endif
+#include "azure_c_shared_utility/gballoc.h"
+
+#include "azure_c_shared_utility/hmacsha256.h"
+#include "azure_c_shared_utility/hmac.h"
+#include "azure_c_shared_utility/strings.h"
+
+HMACSHA256_RESULT HMACSHA256_ComputeHash(const unsigned char* key, size_t keyLen, const unsigned char* payload, size_t payloadLen, BUFFER_HANDLE hash)
+{
+ HMACSHA256_RESULT result;
+
+ if (key == NULL ||
+ keyLen == 0 ||
+ payload == NULL ||
+ payloadLen == 0 ||
+ hash == NULL)
+ {
+ result = HMACSHA256_INVALID_ARG;
+ }
+ else
+ {
+ if ((BUFFER_enlarge(hash, 32) != 0) ||
+ (hmac(SHA256, payload, (int)payloadLen, key, (int)keyLen, BUFFER_u_char(hash) ) != 0))
+ {
+ result = HMACSHA256_ERROR;
+ }
+ else
+ {
+ result = HMACSHA256_OK;
+ }
+ }
+
+ return result;
+}