From 7e33d4d446d6b7d9a136290993363f833fc13908 Mon Sep 17 00:00:00 2001
From: Nikolaus Gotsche <n@softwarefools.com>
Date: Sun, 24 Sep 2017 22:51:36 +0200
Subject: First Commit of Project Hexfool

getuuid - Demonstration how linux's uuidgen can be used in go

jsonrest - api for restful json usage

signup - login on top of an mysql db
---
 signup.go | 105 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 105 insertions(+)
 create mode 100644 signup.go

(limited to 'signup.go')

diff --git a/signup.go b/signup.go
new file mode 100644
index 0000000..e659505
--- /dev/null
+++ b/signup.go
@@ -0,0 +1,105 @@
+package main
+
+import "database/sql"
+import _ "github.com/go-sql-driver/mysql"
+
+import "golang.org/x/crypto/bcrypt"
+
+import "net/http"
+
+import "os/exec"
+
+var db *sql.DB
+var err error
+
+func signupPage(res http.ResponseWriter, req *http.Request) {
+    if req.Method != "POST" {
+        http.ServeFile(res, req, "html/signup.html")
+        return
+    }
+
+    username := req.FormValue("username")
+    password := req.FormValue("password")
+
+    var user string
+
+    err := db.QueryRow("SELECT username FROM players WHERE username=?",username).Scan(&user)
+
+    switch {
+    case err == sql.ErrNoRows:
+        hashedPassword, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost)
+        if err != nil {
+            http.Error(res, "Server Error creating Password. Unable to create account! You Fool...", 500)
+            return
+        }
+        newuuid, uiderr := exec.Command("uuidgen").Output()
+        if uiderr != nil{
+            http.Error(res, "Server Error creating UUID. Unable to create account! You Fool...", 500)
+            return
+        }
+
+        _, err = db.Exec("INSERT INTO players(username, password, uuid) VALUES(?, ?, ?)", username, hashedPassword, newuuid)
+        if err != nil {
+            http.Error(res, "Server Error Inserting User. Unable to create account! You Fool...", 500)
+            return
+        }
+        res.Write([]byte("User Created Successfully!"))
+        return
+    case err != nil:
+        http.Error(res, "Server Error! Something fucked up", 500)
+        return
+    default:
+        http.Redirect(res, req, "/", 301)
+    }
+}
+
+func loginPage(res http.ResponseWriter, req *http.Request) {
+    if req.Method != "POST" {
+        http.ServeFile(res, req, "html/login.html")
+        return
+    }
+
+    username := req.FormValue("username")
+    password := req.FormValue("password")
+
+    var databaseUsername string
+    var databasePassword string
+    var databaseUUID string
+
+    err := db.QueryRow("SELECT username, password, uuid FROM players WHERE username=?", username).Scan(&databaseUsername, &databasePassword, &databaseUUID)
+
+    if err != nil {
+        http.Redirect(res, req, "/login", 301)
+        return
+    }
+
+    err = bcrypt.CompareHashAndPassword([]byte(databasePassword), []byte(password))
+    if err != nil {
+        http.Redirect(res, req, "/login", 301)
+        return
+    }
+
+    res.Write([]byte("Hello "+ databaseUsername + "! Your UUID is "+ databaseUUID))
+}
+
+func homePage(res http.ResponseWriter, req *http.Request) {
+    http.ServeFile(res, req, "html/index.html")
+}
+
+func main() {
+    db, err = sql.Open("mysql", "hexmaster:waSIdocHneTdUobeRoarscH@tcp(192.168.0.16)/hexmaster")
+    if err != nil {
+        panic(err.Error())
+    }
+    defer db.Close()
+
+    err = db.Ping()
+    if err != nil {
+        panic(err.Error())
+    }
+
+    http.HandleFunc("/signup", signupPage)
+    http.HandleFunc("/login", loginPage)
+    http.HandleFunc("/", homePage)
+    http.ListenAndServe(":8088", nil)
+}
-- 
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