From fbcac585cf626917e2baf1d0065c7b632341ba01 Mon Sep 17 00:00:00 2001
From: Gabriel Arakaki Giovanini <mail@gabrielgio.me>
Date: Wed, 19 Jul 2023 21:01:23 +0200
Subject: ref: Move auth functions to service

---
 pkg/ext/auth.go       | 72 ---------------------------------------------------
 pkg/ext/auth_test.go  | 40 ----------------------------
 pkg/ext/middleware.go |  9 ++++---
 3 files changed, 5 insertions(+), 116 deletions(-)
 delete mode 100644 pkg/ext/auth.go
 delete mode 100644 pkg/ext/auth_test.go

(limited to 'pkg/ext')

diff --git a/pkg/ext/auth.go b/pkg/ext/auth.go
deleted file mode 100644
index ed122bb..0000000
--- a/pkg/ext/auth.go
+++ /dev/null
@@ -1,72 +0,0 @@
-package ext
-
-import (
-	"bytes"
-	"crypto/aes"
-	"crypto/cipher"
-	"crypto/rand"
-	"encoding/gob"
-	"errors"
-	"io"
-)
-
-type Token struct {
-	UserID   uint
-	Username string
-}
-
-func ReadToken(data []byte, key []byte) (*Token, error) {
-	block, err := aes.NewCipher(key)
-	if err != nil {
-		return nil, err
-	}
-
-	aesgcm, err := cipher.NewGCM(block)
-	if err != nil {
-		panic(err.Error())
-	}
-
-	nonceSize := aesgcm.NonceSize()
-	if len(data) < nonceSize {
-		return nil, errors.New("nonce size greater than data's size")
-	}
-
-	nonce, ciphertext := data[:nonceSize], data[nonceSize:]
-	plaintext, err := aesgcm.Open(nil, nonce, ciphertext, nil)
-	if err != nil {
-		return nil, err
-	}
-
-	r := bytes.NewReader(plaintext)
-	var token Token
-	dec := gob.NewDecoder(r)
-	if err = dec.Decode(&token); err != nil {
-		return nil, err
-	}
-	return &token, nil
-}
-
-func WriteToken(token *Token, key []byte) ([]byte, error) {
-	block, err := aes.NewCipher(key)
-	if err != nil {
-		return nil, err
-	}
-
-	aesgcm, err := cipher.NewGCM(block)
-	if err != nil {
-		return nil, err
-	}
-
-	var buffer bytes.Buffer
-	enc := gob.NewEncoder(&buffer)
-	if err := enc.Encode(token); err != nil {
-		return nil, err
-	}
-	nonce := make([]byte, aesgcm.NonceSize())
-	if _, err = io.ReadFull(rand.Reader, nonce); err != nil {
-		return nil, err
-	}
-
-	ciphertext := aesgcm.Seal(nonce, nonce, buffer.Bytes(), nil)
-	return ciphertext, nil
-}
diff --git a/pkg/ext/auth_test.go b/pkg/ext/auth_test.go
deleted file mode 100644
index dc72a0c..0000000
--- a/pkg/ext/auth_test.go
+++ /dev/null
@@ -1,40 +0,0 @@
-//go:build unit
-
-package ext
-
-import (
-	"testing"
-
-	"git.sr.ht/~gabrielgio/img/pkg/testkit"
-)
-
-func TestReadWriteToken(t *testing.T) {
-	t.Parallel()
-
-	testCases := []struct {
-		name  string
-		key   []byte
-		token *Token
-	}{
-		{
-			name: "Normal write",
-			key:  []byte("AES256Key-32Characters1234567890"),
-			token: &Token{
-				UserID:   3,
-				Username: "username",
-			},
-		},
-	}
-
-	for _, tc := range testCases {
-		t.Run(tc.name, func(t *testing.T) {
-			data, err := WriteToken(tc.token, tc.key)
-			testkit.TestFatalError(t, "WriteToken", err)
-
-			token, err := ReadToken(data, tc.key)
-			testkit.TestFatalError(t, "ReadToken", err)
-
-			testkit.TestValue(t, "ReadWriteToken", token, tc.token)
-		})
-	}
-}
diff --git a/pkg/ext/middleware.go b/pkg/ext/middleware.go
index 2dd1cca..bcc6c5f 100644
--- a/pkg/ext/middleware.go
+++ b/pkg/ext/middleware.go
@@ -8,6 +8,7 @@ import (
 	"github.com/valyala/fasthttp"
 
 	"git.sr.ht/~gabrielgio/img/pkg/database/repository"
+	"git.sr.ht/~gabrielgio/img/pkg/service"
 )
 
 func HTML(next fasthttp.RequestHandler) fasthttp.RequestHandler {
@@ -77,7 +78,7 @@ func (a *AuthMiddleware) LoggedIn(next fasthttp.RequestHandler) fasthttp.Request
 			return
 		}
 
-		token, err := ReadToken(auth, a.key)
+		token, err := service.ReadToken(auth, a.key)
 		if err != nil {
 			a.entry.Error(err)
 			ctx.Redirect(redirectLogin, 307)
@@ -92,9 +93,9 @@ func (a *AuthMiddleware) LoggedIn(next fasthttp.RequestHandler) fasthttp.Request
 	}
 }
 
-func GetTokenFromCtx(ctx *fasthttp.RequestCtx) *Token {
+func GetTokenFromCtx(ctx *fasthttp.RequestCtx) *service.Token {
 	tokenValue := ctx.UserValue("token")
-	if token, ok := tokenValue.(*Token); ok {
+	if token, ok := tokenValue.(*service.Token); ok {
 		return token
 	}
 	return nil
@@ -113,7 +114,7 @@ func NewInitialSetupMiddleware(userRepository repository.UserRepository) *Initia
 func (i *InitialSetupMiddleware) Check(next fasthttp.RequestHandler) fasthttp.RequestHandler {
 	return func(ctx *fasthttp.RequestCtx) {
 		// if user has been set to context it is logged in already
-		_, ok := ctx.UserValue("token").(*Token)
+		_, ok := ctx.UserValue("token").(*service.Token)
 		if ok {
 			next(ctx)
 			return
-- 
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