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User.go
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User.go
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package models
import (
"crypto/aes"
"crypto/cipher"
"crypto/rand"
"errors"
"io"
"github.com/roger-king/tasker/utils"
"github.com/sirupsen/logrus"
)
type User struct {
Email string `json:"email" bson:"email"`
Name string `json:"name" bson:"name"`
UserName string `json:"username" bson:"username"`
EncryptedAccessToken string `json:"-" bson:"accessToken"`
AccessToken string `json:"-" bson:"-"`
Bio string `json:"bio" bson:"bio"`
GitHubURL string `json:"githubURL" bson:"githubURL"`
}
func (u *User) BeforeCreate() error {
bKey := []byte(u.AccessToken)
encryptedToken, err := encrypt(bKey, []byte(utils.TaskerSecret))
if err != nil {
logrus.Error("error", err)
return err
}
u.EncryptedAccessToken = string(encryptedToken)
return nil
}
func (u *User) GetAccessToken() (string, error) {
secret := utils.TaskerSecret
token, err := decrypt([]byte(u.EncryptedAccessToken), []byte(secret))
return string(token), err
}
func encrypt(plaintext []byte, secret []byte) ([]byte, error) {
c, err := aes.NewCipher(secret)
if err != nil {
return nil, err
}
gcm, err := cipher.NewGCM(c)
if err != nil {
return nil, err
}
nonce := make([]byte, gcm.NonceSize())
if _, err = io.ReadFull(rand.Reader, nonce); err != nil {
return nil, err
}
return gcm.Seal(nonce, nonce, plaintext, nil), nil
}
func decrypt(ciphertext []byte, secret []byte) ([]byte, error) {
c, err := aes.NewCipher(secret)
if err != nil {
return nil, err
}
gcm, err := cipher.NewGCM(c)
if err != nil {
return nil, err
}
nonceSize := gcm.NonceSize()
if len(ciphertext) < nonceSize {
return nil, errors.New("ciphertext too short")
}
nonce, ciphertext := ciphertext[:nonceSize], ciphertext[nonceSize:]
return gcm.Open(nil, nonce, ciphertext, nil)
}