adding add_client to server

src/client_backend/security.cpp

@@ -0,0 +1,60 @@
+#include "security.h"
+
+int check_cert(const char*cert,const char*secrets_path) {
+	FILE* fp;
+	if (fopen_s(&fp, secrets_path, "r") != 0) {
+		return 1;
+	}
+	else {
+		char*secrets = new char[300];
+		while (!feof(fp)) {
+			fscanf_s(fp, "%s", secrets, 295); // get the secret
+			if (strcmp("cert", secrets) == 0) {
+				fscanf_s(fp, "%s", secrets, 295); // get the secret
+				if (strcmp(cert, secrets) == 0) {
+					delete[] secrets;
+					return 0;
+				}
+			}
+		}
+		delete[] secrets;
+		return 2;
+	}
+
+}
+char* get_apikey(const char* secrets_path) {
+	FILE* fp;
+	if (fopen_s(&fp, secrets_path, "r") != 0) {
+		return 0;
+	}
+	else {
+		char*secrets = new char[300];
+		while (!feof(fp)) {
+			fscanf_s(fp, "%s", secrets, 295); // get the secret
+			if (strcmp("apikey", secrets) == 0) {
+				fscanf_s(fp, "%s", secrets, 295); // get the secret
+				return secrets;
+			}
+		}
+		delete[] secrets;
+		return 0;
+	}
+}
+char* get_machineid(const char*secrets_path){
+	FILE* fp;
+	if (fopen_s(&fp, secrets_path, "r") != 0) {
+		return 0;
+	}
+	else {
+		char* secrets = new char[300];
+		while (!feof(fp)) {
+			fscanf_s(fp, "%s", secrets, 295); // get the secret
+			if (strcmp("machineid", secrets) == 0) {
+				fscanf_s(fp, "%s", secrets, 295); // get the secret
+				return secrets;
+			}
+		}
+		delete[] secrets;
+		return 0;
+	}
+}