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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,190 @@ | ||
| /* This Source Code Form is subject to the terms of the Mozilla Public | ||
| * License, v. 2.0. If a copy of the MPL was not distributed with this | ||
| * file, You can obtain one at http://mozilla.org/MPL/2.0/. | ||
| * | ||
| * Copyright 2018 (c) Kalycito Infotech Private Limited | ||
| */ | ||
|
|
||
| #include <stdio.h> | ||
| #include <errno.h> | ||
|
|
||
| #include "open62541.h" | ||
|
|
||
| #define MIN_ARGS 3 | ||
| #define FAILURE 1 | ||
| #define CONNECTION_STRING "opc.tcp://localhost:4840" | ||
|
|
||
| /* loadFile parses the certificate file. | ||
| * | ||
| * @param path specifies the file name given in argv[] | ||
| * @return Returns the file content after parsing */ | ||
| static UA_ByteString loadFile(const char *const path) { | ||
| UA_ByteString fileContents = UA_BYTESTRING_NULL; | ||
| if(path == NULL) | ||
| return fileContents; | ||
|
|
||
| /* Open the file */ | ||
| FILE *fp = fopen(path, "rb"); | ||
| if(!fp) { | ||
| errno = 0; /* We read errno also from the tcp layer */ | ||
| return fileContents; | ||
| } | ||
|
|
||
| /* Get the file length, allocate the data and read */ | ||
| fseek(fp, 0, SEEK_END); | ||
| fileContents.length = (size_t)ftell(fp); | ||
| fileContents.data = (UA_Byte*)UA_malloc(fileContents.length * sizeof(UA_Byte)); | ||
| if(fileContents.data) { | ||
| fseek(fp, 0, SEEK_SET); | ||
| size_t read = fread(fileContents.data, sizeof(UA_Byte), fileContents.length, fp); | ||
| if(read != fileContents.length) | ||
| UA_ByteString_deleteMembers(&fileContents); | ||
| } else { | ||
| fileContents.length = 0; | ||
| } | ||
|
|
||
| fclose(fp); | ||
| return fileContents; | ||
| } | ||
|
|
||
| /* cleanupClient deletes the memory allocated for client configuration. | ||
| * | ||
| * @param client client configuration that need to be deleted | ||
| * @param remoteCertificate server certificate */ | ||
| static void cleanupClient(UA_Client* client, UA_ByteString* remoteCertificate) { | ||
| UA_ByteString_delete(remoteCertificate); /* Dereference the memory */ | ||
| UA_Client_delete(client); /* Disconnects the client internally */ | ||
| } | ||
|
|
||
| /* main function for secure client implementation. | ||
| * | ||
| * @param argc count of command line variable provided | ||
| * @param argv[] array of strings include certificate, private key, | ||
| * trust list and revocation list | ||
| * @return Return an integer representing success or failure of application */ | ||
| int main(int argc, char* argv[]) { | ||
| UA_Client* client = NULL; | ||
| UA_ByteString* remoteCertificate = NULL; | ||
| UA_StatusCode retval = UA_STATUSCODE_GOOD; | ||
| UA_ByteString* trustList = NULL; | ||
| size_t trustListSize = 0; | ||
| UA_ByteString* revocationList = NULL; | ||
| size_t revocationListSize = 0; | ||
|
|
||
| /* endpointArray is used to hold the available endpoints in the server | ||
| * endpointArraySize is used to hold the number of endpoints available */ | ||
| UA_EndpointDescription* endpointArray = NULL; | ||
| size_t endpointArraySize = 0; | ||
|
|
||
| /* Load certificate and private key */ | ||
| UA_ByteString certificate = loadFile(argv[1]); | ||
| UA_ByteString privateKey = loadFile(argv[2]); | ||
|
|
||
| if(argc < MIN_ARGS) { | ||
| UA_LOG_FATAL(UA_Log_Stdout, UA_LOGCATEGORY_USERLAND, | ||
| "The Certificate and key is missing." | ||
| "The required arguments are " | ||
| "<client-certificate.der> <client-private-key.der> " | ||
| "[<trustlist1.crl>, ...]"); | ||
| return FAILURE; | ||
| } | ||
|
|
||
| /* The Get endpoint (discovery service) is done with | ||
| * security mode as none to see the server's capability | ||
| * and certificate */ | ||
| client = UA_Client_new(UA_ClientConfig_default); | ||
| remoteCertificate = UA_ByteString_new(); | ||
| retval = UA_Client_getEndpoints(client, CONNECTION_STRING, | ||
| &endpointArraySize, &endpointArray); | ||
| if(retval != UA_STATUSCODE_GOOD) { | ||
| UA_Array_delete(endpointArray, endpointArraySize, | ||
| &UA_TYPES[UA_TYPES_ENDPOINTDESCRIPTION]); | ||
| cleanupClient(client, remoteCertificate); | ||
| return (int)retval; | ||
| } | ||
|
|
||
| printf("%i endpoints found\n", (int)endpointArraySize); | ||
| for(size_t endPointCount = 0; endPointCount < endpointArraySize; endPointCount++) { | ||
| printf("URL of endpoint %i is %.*s\n", (int)endPointCount, | ||
| (int)endpointArray[endPointCount].endpointUrl.length, | ||
| endpointArray[endPointCount].endpointUrl.data); | ||
| if(endpointArray[endPointCount].securityMode == UA_MESSAGESECURITYMODE_SIGNANDENCRYPT) | ||
| UA_ByteString_copy(&endpointArray[endPointCount].serverCertificate, remoteCertificate); | ||
| } | ||
|
|
||
| if(UA_ByteString_equal(remoteCertificate, &UA_BYTESTRING_NULL)) { | ||
| UA_LOG_FATAL(UA_Log_Stdout, UA_LOGCATEGORY_USERLAND, | ||
| "Server does not support Security Mode of" | ||
| " UA_MESSAGESECURITYMODE_SIGNANDENCRYPT"); | ||
| cleanupClient(client, remoteCertificate); | ||
| return FAILURE; | ||
| } | ||
|
|
||
| UA_Array_delete(endpointArray, endpointArraySize, | ||
| &UA_TYPES[UA_TYPES_ENDPOINTDESCRIPTION]); | ||
|
|
||
| /* Load the trustList. Load revocationList is not supported now */ | ||
| if(argc > MIN_ARGS) { | ||
| trustListSize = (size_t)argc-MIN_ARGS; | ||
| retval = UA_ByteString_allocBuffer(trustList, trustListSize); | ||
| if(retval != UA_STATUSCODE_GOOD) { | ||
| cleanupClient(client, remoteCertificate); | ||
| return (int)retval; | ||
| } | ||
|
|
||
| for(size_t trustListCount = 0; trustListCount < trustListSize; trustListCount++) { | ||
| trustList[trustListCount] = loadFile(argv[trustListCount+3]); | ||
| } | ||
| } | ||
|
|
||
| /* Secure client initialization */ | ||
| client = UA_Client_secure_new(UA_ClientConfig_default, | ||
| certificate, privateKey, | ||
| remoteCertificate, | ||
| trustList, trustListSize, | ||
| revocationList, revocationListSize); | ||
| if(client == NULL) { | ||
| UA_ByteString_delete(remoteCertificate); /* Dereference the memory */ | ||
| return FAILURE; | ||
| } | ||
|
|
||
| UA_ByteString_deleteMembers(&certificate); | ||
| UA_ByteString_deleteMembers(&privateKey); | ||
| for(size_t deleteCount = 0; deleteCount < trustListSize; deleteCount++) { | ||
| UA_ByteString_deleteMembers(&trustList[deleteCount]); | ||
| } | ||
|
|
||
| if(!client) { | ||
| UA_LOG_FATAL(UA_Log_Stdout, UA_LOGCATEGORY_USERLAND, | ||
| "Could not create the server config"); | ||
| cleanupClient(client, remoteCertificate); | ||
| return FAILURE; | ||
| } | ||
|
|
||
| /* Secure client connect */ | ||
| retval = UA_Client_connect(client, CONNECTION_STRING); | ||
| if(retval != UA_STATUSCODE_GOOD) { | ||
| cleanupClient(client, remoteCertificate); | ||
| return (int)retval; | ||
| } | ||
|
|
||
| UA_Variant value; | ||
| UA_Variant_init(&value); | ||
|
|
||
| /* NodeId of the variable holding the current time */ | ||
| const UA_NodeId nodeId = UA_NODEID_NUMERIC(0, UA_NS0ID_SERVER_SERVERSTATUS_CURRENTTIME); | ||
| retval = UA_Client_readValueAttribute(client, nodeId, &value); | ||
|
|
||
| if(retval == UA_STATUSCODE_GOOD && | ||
| UA_Variant_hasScalarType(&value, &UA_TYPES[UA_TYPES_DATETIME])) { | ||
| UA_DateTime raw_date = *(UA_DateTime *) value.data; | ||
| UA_DateTimeStruct dts = UA_DateTime_toStruct(raw_date); | ||
| UA_LOG_INFO(UA_Log_Stdout, UA_LOGCATEGORY_USERLAND, "date is: %u-%u-%u %u:%u:%u.%03u\n", | ||
| dts.day, dts.month, dts.year, dts.hour, dts.min, dts.sec, dts.milliSec); | ||
| } | ||
|
|
||
| /* Clean up */ | ||
| UA_Variant_deleteMembers(&value); | ||
| cleanupClient(client, remoteCertificate); | ||
| return (int)retval; | ||
| } |
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