soft-serve

 1package backend
 2
 3import (
 4	"crypto/rand"
 5	"crypto/sha256"
 6	"encoding/hex"
 7
 8	"github.com/charmbracelet/log/v2"
 9	"golang.org/x/crypto/bcrypt"
10)
11
12const saltySalt = "salty-soft-serve"
13
14// HashPassword hashes the password using bcrypt.
15func HashPassword(password string) (string, error) {
16	crypt, err := bcrypt.GenerateFromPassword([]byte(password+saltySalt), bcrypt.DefaultCost)
17	if err != nil {
18		return "", err
19	}
20
21	return string(crypt), nil
22}
23
24// VerifyPassword verifies the password against the hash.
25func VerifyPassword(password, hash string) bool {
26	err := bcrypt.CompareHashAndPassword([]byte(hash), []byte(password+saltySalt))
27	return err == nil
28}
29
30// GenerateToken returns a random unique token.
31func GenerateToken() string {
32	buf := make([]byte, 20)
33	if _, err := rand.Read(buf); err != nil {
34		log.Error("unable to generate access token")
35		return ""
36	}
37
38	return "ss_" + hex.EncodeToString(buf)
39}
40
41// HashToken hashes the token using sha256.
42func HashToken(token string) string {
43	sum := sha256.Sum256([]byte(token + saltySalt))
44	return hex.EncodeToString(sum[:])
45}