1 files changed, 27 insertions, 1 deletions
diff --git a/user/user.go b/user/user.go
index 1324c0e..68ceb47 100644
--- a/user/user.go
+++ b/user/user.go
@@ -18,15 +18,22 @@
 package user
 
 import (
-	"gorm.io/gorm"
 	d "vidhukant.com/openbills/db"
+	e "vidhukant.com/openbills/errors"
+	"golang.org/x/crypto/bcrypt"
+	"gorm.io/gorm"
+	"github.com/spf13/viper"
+	"errors"
 )
 
+var COST int
 var db *gorm.DB
 func init() {
 	db = d.DB
 
 	db.AutoMigrate(&User{})
+
+	COST = viper.GetInt("cryptography.password_hashing_cost")
 }
 
 type User struct {
@@ -36,3 +43,22 @@ type User struct {
 	Password   string
 	IsVerified bool
 }
+
+func CheckPassword(id uint, pass string) error {
+	var user User
+	err := GetUser(&user, id)
+	if err != nil {
+		return err
+	}
+
+	err = bcrypt.CompareHashAndPassword([]byte(user.Password), []byte(pass))
+	if err != nil {
+		if errors.Is(err, bcrypt.ErrMismatchedHashAndPassword) {
+			return e.ErrWrongPassword
+		}
+
+		return err
+	}
+
+	return nil
+}