add crypto library, begin writing createUser function

dub.json

@@ -4,6 +4,7 @@
 		"Sean Bailey"
 	],
 	"dependencies": {
+		"crypto": "~>0.2.13",
 		"ddbus": "~>2.3.0",
 		"jsonizer": "~master"
 	},

dub.selections.json

@@ -2,8 +2,10 @@
 	"fileVersion": 1,
 	"versions": {
 		"asdf": "0.5.7",
+		"crypto": "0.2.13",
 		"ddbus": "2.3.0",
 		"dunit": "1.0.16",
+		"intel-intrinsics": "1.2.3",
 		"jsonizer": "~master"
 	}
 }

source/daemon.d

@@ -94,7 +94,7 @@ string daemonCall(string name, string data) {
 	
 	// call dbus method
 	User user;
-	user.id = to!string(getlogin());
+	user.name = to!string(getlogin());
 	string resultJson = daemon_proxy.call!string(name, user.toJSONString(), data);
 
 	// parse JSON status/result

source/model/instance.d

@@ -11,8 +11,8 @@ struct Instance {
 
 	@jsonize {
 		string name;    // project git name
-		string owner; // project owner name
-		int[] ports;  // reserved port numbers (or null)
+		string owner;   // project owner name
+		int[] ports;    // reserved port numbers (or null)
 	}
 
 	bool opEquals(Instance other) {

source/model/user.d

@@ -7,10 +7,20 @@ struct User {
 	mixin JsonizeMe;
 
 	@jsonize {
-		string id; // user id
+		string name;         // username
+		string[] instances;  // owned projects
+		bool admin;
+	}
+
+	string id() {
+		return name;
 	}
 
 	bool opEquals(User other) {
-		return this.id != null && this.id == other.id;
+		return this.name != null && this.name == other.name;
+	}
+
+	string getPath() {
+		return "/home/" ~ name;
 	}
 }

source/service/users.d

@@ -0,0 +1,42 @@
+module service.users;
+
+import config.global : GlobalConfig;
+import model.user : User;
+import jsonizer.tojson;
+
+import std.file : isDir, mkdir, write, FileException;
+import core.stdc.errno : EEXIST;
+
+import crypto.rsa;
+
+/**
+ * Args: (string) username
+ * Returns: (User) created user
+ */
+string createUser(GlobalConfig conf, User caller, string username) {
+	if (!caller.admin)
+		throw new Exception("Only administrators can create a new user!");
+	
+	User user;
+	user.name = username;
+
+	if (!isDir(user.getPath()))
+		throw new Exception("The user directory doesn't exist! " ~ user.getPath());
+	
+	string horrificDir = user.getPath() ~ "/.horrific";
+	try {
+		mkdir(horrificDir);
+	} catch (FileException e) {
+		// only catch exception if EEXIST (dir already exists)
+		if (e.errno != EEXIST)
+			throw e;
+	}
+
+	RSAKeyPair keyPair = RSA.generateKeyPair(1024);
+	write(horrificDir ~ "/id_rsa", keyPair.privateKey);
+	write(horrificDir ~ "/id_rsa_pub", keyPair.publicKey);
+
+	conf.users.insert(user.id(), user);
+	conf.users.save();
+	return user.toJSONString();
+}