Diff: source/PassphraseAuthenticator.cpp

Revision:

13:9edad7677211

Child:

24:c92984bede9c

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/source/PassphraseAuthenticator.cpp	Wed Jun 08 22:32:08 2016 +0000
@@ -0,0 +1,92 @@
+/**
+ * @file    PassphraseAuthenticator.cpp
+ * @brief   mbed CoAP Endpoint Device Management Passphrase-based Authenticator class
+ * @author  Doug Anson
+ * @version 1.0
+ * @see
+ *
+ * Copyright (c) 2016
+ *
+ * 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.
+ */
+ 
+// Class support
+#include "mbed-connector-interface/PassphraseAuthenticator.h"
+
+// demarshalling support
+#include "mbed-client/m2mresource.h"
+ 
+// constructor
+PassphraseAuthenticator::PassphraseAuthenticator(const Logger *logger,const void *passphrase) : Authenticator(logger,passphrase) {
+}
+
+// copy constructor
+PassphraseAuthenticator::PassphraseAuthenticator(const PassphraseAuthenticator &authenticator) : Authenticator(authenticator) {
+}
+
+// destructor
+PassphraseAuthenticator::~PassphraseAuthenticator() {
+}
+
+// basic (trivial passphrase authentication)
+bool PassphraseAuthenticator::authenticate(void *challenge) {
+#if defined (HAS_EXECUTE_PARAMS)
+    // use simple, trivial passphrase based comparison as the check... 
+    char *passphrase = (char *)this->m_secret;
+    char *input_passphrase = NULL;
+    
+    // unmarshall the challenge... its a simple string
+    M2MResource::M2MExecuteParameter* param = (M2MResource::M2MExecuteParameter*)challenge;
+    if (param != NULL) {
+        // use parameters to extract the passphrase
+        String object_name = param->get_argument_object_name();
+        int instance_id = (int)param->get_argument_object_instance_id();
+        String resource_name = param->get_argument_resource_name();
+        string value = this->coapDataToString(param->get_argument_value(),param->get_argument_value_length());
+        input_passphrase = (char *)value.c_str();
+    }
+    
+    // DEBUG
+    //this->m_logger->log("Authenticator(passphrase): passphrase: [%s] challenge: [%s]",passphrase,input_passphrase);
+    
+    // parameter checks...the compare passphrases and return the result
+    if (passphrase != NULL && input_passphrase != NULL && strcmp(passphrase,input_passphrase) == 0) {
+        // DEBUG
+        this->m_logger->log("Authenticator(passphrase): Passphrases MATCH. Authenticated.");
+    
+        // passphrases match
+        return true;
+    }
+    
+    // DEBUG
+    this->m_logger->log("Authenticator(passphrase): Passphrases do not match");
+    
+    // authentication failure
+    return false;
+#else
+    // DEBUG
+    this->m_logger->log("Authenticator(passphrase): OLD mbed-client detected. Authentication OK (passthru)");
+    return true;
+#endif
+}
+
+// convenience method to get the URI from its buffer field...
+string PassphraseAuthenticator::coapDataToString(uint8_t *coap_data_ptr,int coap_data_ptr_length) {
+    if (coap_data_ptr != NULL && coap_data_ptr_length > 0) {
+        char buf[MAX_VALUE_BUFFER_LENGTH+1];
+        memset(buf,0,MAX_VALUE_BUFFER_LENGTH+1);
+        memcpy(buf,(char *)coap_data_ptr,coap_data_ptr_length);
+        return string(buf);
+    }
+    return string("");
+}
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