Import Mbed OS hard-float snapshot

connectivity/nanostack/sal-stack-nanostack/source/Service_Libs/hmac/hmac_sha1.c

@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2016-2019, Arm Limited and affiliates.
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "nsconfig.h"
+#include <string.h>
+#include "ns_types.h"
+#include "ns_list.h"
+#include "ns_trace.h"
+#include "mbedtls/md.h"
+#include "Service_Libs/hmac/hmac_sha1.h"
+
+#define TRACE_GROUP "hmac"
+
+int8_t hmac_sha1_calc(const uint8_t *key, uint16_t key_len, const uint8_t *data, uint16_t data_len, uint8_t *result, uint8_t result_len)
+{
+#ifdef EXTRA_DEBUG_INFO
+    // Extensive debug for now, to be disabled later
+    tr_debug("hmac_sha_1 key %s\n", trace_array(key, key_len));
+
+    const uint8_t *print_data = data;
+    uint16_t print_data_len = data_len;
+    while (true) {
+        tr_debug("hmac_sha_1 data %s\n", trace_array(print_data, print_data_len > 32 ? 32 : print_data_len));
+        if (print_data_len > 32) {
+            print_data_len -= 32;
+            print_data += 32;
+        } else {
+            break;
+        }
+    }
+#endif
+
+    const mbedtls_md_type_t md_type = MBEDTLS_MD_SHA1;
+    const mbedtls_md_info_t *md_info = mbedtls_md_info_from_type(md_type);
+    if (md_info == NULL) {
+        return -1;
+    }
+
+    mbedtls_md_context_t ctx;
+
+    mbedtls_md_init(&ctx);
+    if (mbedtls_md_setup(&ctx, md_info, 1) != 0) {
+        return -1;
+    }
+    if (mbedtls_md_hmac_starts(&ctx, (const unsigned char *) key, key_len) != 0) {
+        goto error;
+    }
+    if (mbedtls_md_hmac_update(&ctx, (const unsigned char *) data, data_len) != 0) {
+        goto error;
+    }
+
+    uint8_t result_value[20];
+    if (mbedtls_md_hmac_finish(&ctx, result_value) != 0) {
+        goto error;
+    }
+    mbedtls_md_free(&ctx);
+
+    if (result_len > 20) {
+        result_len = 20;
+    }
+
+    memcpy(result, result_value, result_len);
+
+#ifdef EXTRA_DEBUG_INFO
+    tr_debug("hmac_sha_1 result %s\n", trace_array(result_value, 20));
+#endif
+    return 0;
+
+error:
+    mbedtls_md_free(&ctx);
+    return -1;
+}