From 75f83568938f4c6f70e79ce27612ebf197c30c49 Mon Sep 17 00:00:00 2001
From: Caleb Gardner <calebq23@gmail.com>
Date: Sat, 18 May 2024 10:00:37 -0500
Subject: [PATCH] Getting basics down

---
 go.mod                                       |  7 +++
 go.sum                                       |  6 ++
 internal/darkstorm_backend/README.md         |  4 ++
 internal/darkstorm_backend/app.go            | 10 +++-
 internal/darkstorm_backend/crash.go          |  4 ++
 internal/darkstorm_backend/darkstorm_test.go |  1 +
 internal/darkstorm_backend/user.go           | 62 ++++++++++++++++++++
 internal/db/interface.go                     |  5 ++
 8 files changed, 98 insertions(+), 1 deletion(-)
 create mode 100644 internal/darkstorm_backend/crash.go
 create mode 100644 internal/darkstorm_backend/darkstorm_test.go
 create mode 100644 internal/darkstorm_backend/user.go
 create mode 100644 internal/db/interface.go

diff --git a/go.mod b/go.mod
index e88cfaf..3b03944 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,10 @@
 module github.com/CalebQ42/darkstorm-server
 
 go 1.22.3
+
+require golang.org/x/crypto v0.23.0
+
+require (
+	github.com/google/uuid v1.6.0 // indirect
+	golang.org/x/sys v0.20.0 // indirect
+)
diff --git a/go.sum b/go.sum
index e69de29..4297843 100644
--- a/go.sum
+++ b/go.sum
@@ -0,0 +1,6 @@
+github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
+github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+golang.org/x/crypto v0.23.0 h1:dIJU/v2J8Mdglj/8rJ6UUOM3Zc9zLZxVZwwxMooUSAI=
+golang.org/x/crypto v0.23.0/go.mod h1:CKFgDieR+mRhux2Lsu27y0fO304Db0wZe70UKqHu0v8=
+golang.org/x/sys v0.20.0 h1:Od9JTbYCk261bKm4M/mw7AklTlFYIa0bIp9BgSm1S8Y=
+golang.org/x/sys v0.20.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
diff --git a/internal/darkstorm_backend/README.md b/internal/darkstorm_backend/README.md
index 9d244c2..35e8bbf 100644
--- a/internal/darkstorm_backend/README.md
+++ b/internal/darkstorm_backend/README.md
@@ -28,7 +28,11 @@ This is a purposefully "simple" application backend made specifically for _my_ a
   username: "username",
   password: "hashed password",
   salt: "password salt",
+  email: "email",
   passwordChange: 0, // unix timestamp of last password change
+  perm: {
+    appID: "user", // Optional. Apps should have a default permission level if thier appID is not in perm.
+  }
 }
 ```
 
diff --git a/internal/darkstorm_backend/app.go b/internal/darkstorm_backend/app.go
index a1e2aca..4ebdc4b 100644
--- a/internal/darkstorm_backend/app.go
+++ b/internal/darkstorm_backend/app.go
@@ -1,3 +1,11 @@
 package darkstorm
 
-type App interface{}
\ No newline at end of file
+type App interface {
+	//TODO
+}
+
+type CrashApp interface {
+	App
+	AddCrash(CrashReport)
+	// TODO
+}
diff --git a/internal/darkstorm_backend/crash.go b/internal/darkstorm_backend/crash.go
new file mode 100644
index 0000000..043f315
--- /dev/null
+++ b/internal/darkstorm_backend/crash.go
@@ -0,0 +1,4 @@
+package darkstorm
+
+type CrashReport struct{}
+
diff --git a/internal/darkstorm_backend/darkstorm_test.go b/internal/darkstorm_backend/darkstorm_test.go
new file mode 100644
index 0000000..a8fface
--- /dev/null
+++ b/internal/darkstorm_backend/darkstorm_test.go
@@ -0,0 +1 @@
+package darkstorm
diff --git a/internal/darkstorm_backend/user.go b/internal/darkstorm_backend/user.go
new file mode 100644
index 0000000..439299d
--- /dev/null
+++ b/internal/darkstorm_backend/user.go
@@ -0,0 +1,62 @@
+package darkstorm
+
+import (
+	"crypto/rand"
+	"encoding/base64"
+
+	"github.com/google/uuid"
+	"golang.org/x/crypto/argon2"
+)
+
+func generateSalt() (string, error) {
+	out := make([]byte, 16)
+	_, err := rand.Read(out)
+	return base64.RawStdEncoding.EncodeToString(out), err
+}
+
+type User struct {
+	Perm           map[string]string
+	ID             string
+	Username       string
+	Password       string
+	Salt           string
+	Email          string
+	PasswordChange uint64
+}
+
+func NewUser(username, password, email string) (*User, error) {
+	id, err := uuid.NewV7()
+	if err != nil {
+		return nil, err
+	}
+	salt, err := generateSalt()
+	if err != nil {
+		return nil, err
+	}
+	out := &User{
+		Perm:     make(map[string]string),
+		ID:       id.String(),
+		Username: username,
+		Salt:     salt,
+		Email:    email,
+	}
+	out.Password, err = out.HashPassword(password)
+	return out, err
+}
+
+func (u *User) HashPassword(password string) (string, error) {
+	salt, err := base64.RawStdEncoding.DecodeString(u.Salt)
+	if err != nil {
+		return "", err
+	}
+	res := argon2.IDKey([]byte(password), salt, 1, 64*1024, 4, 32)
+	return base64.RawStdEncoding.EncodeToString(res), nil
+}
+
+func (u *User) ValidatePassword(password string) (bool, error) {
+	hsh, err := u.HashPassword(password)
+	if err != nil {
+		return false, err
+	}
+	return hsh == u.Password, nil
+}
diff --git a/internal/db/interface.go b/internal/db/interface.go
new file mode 100644
index 0000000..8a2770a
--- /dev/null
+++ b/internal/db/interface.go
@@ -0,0 +1,5 @@
+package db
+
+type DB interface {
+	//TODO
+}