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focalboard/server/services/auth/password.go

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2020-10-28 15:35:41 +02:00
package auth
import (
"fmt"
"math/rand"
"strings"
"time"
"golang.org/x/crypto/bcrypt"
)
var passwordRandomSource = rand.NewSource(time.Now().Unix())
const (
PasswordMaximumLength = 64
PasswordSpecialChars = "!\"\\#$%&'()*+,-./:;<=>?@[]^_`|~"
PasswordNumbers = "0123456789"
PasswordUpperCaseLetters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
PasswordLowerCaseLetters = "abcdefghijklmnopqrstuvwxyz"
PasswordAllChars = PasswordSpecialChars + PasswordNumbers + PasswordUpperCaseLetters + PasswordLowerCaseLetters
InvalidLowercasePassword = "lowercase"
InvalidMinLengthPassword = "min-length"
InvalidMaxLengthPassword = "max-length"
InvalidNumberPassword = "number"
InvalidUppercasePassword = "uppercase"
InvalidSymbolPassword = "symbol"
)
// HashPassword generates a hash using the bcrypt.GenerateFromPassword
func HashPassword(password string) string {
hash, err := bcrypt.GenerateFromPassword([]byte(password), 10)
if err != nil {
panic(err)
}
return string(hash)
}
// ComparePassword compares the hash
func ComparePassword(hash string, password string) bool {
if len(password) == 0 || len(hash) == 0 {
return false
}
err := bcrypt.CompareHashAndPassword([]byte(hash), []byte(password))
return err == nil
}
func GeneratePassword(minimumLength int) string {
r := rand.New(passwordRandomSource)
// Make sure we are guaranteed at least one of each type to meet any possible password complexity requirements.
password := string([]rune(PasswordUpperCaseLetters)[r.Intn(len(PasswordUpperCaseLetters))]) +
string([]rune(PasswordNumbers)[r.Intn(len(PasswordNumbers))]) +
string([]rune(PasswordLowerCaseLetters)[r.Intn(len(PasswordLowerCaseLetters))]) +
string([]rune(PasswordSpecialChars)[r.Intn(len(PasswordSpecialChars))])
for len(password) < minimumLength {
i := r.Intn(len(PasswordAllChars))
password = password + string([]rune(PasswordAllChars)[i])
}
return password
}
type InvalidPasswordError struct {
FailingCriterias []string
}
func (ipe *InvalidPasswordError) Error() string {
return fmt.Sprintf("invalid password, failing criterias: %s", strings.Join(ipe.FailingCriterias, ", "))
}
type PasswordSettings struct {
MinimumLength int
Lowercase bool
Number bool
Uppercase bool
Symbol bool
}
func (as *AuthService) IsPasswordValid(password string) error {
err := &InvalidPasswordError{
FailingCriterias: []string{},
}
if len(password) < as.passwordSettings.MinimumLength {
err.FailingCriterias = append(err.FailingCriterias, InvalidMinLengthPassword)
}
if len(password) > PasswordMaximumLength {
err.FailingCriterias = append(err.FailingCriterias, InvalidMaxLengthPassword)
}
if as.passwordSettings.Lowercase {
if !strings.ContainsAny(password, PasswordLowerCaseLetters) {
err.FailingCriterias = append(err.FailingCriterias, InvalidLowercasePassword)
}
}
if as.passwordSettings.Uppercase {
if !strings.ContainsAny(password, PasswordUpperCaseLetters) {
err.FailingCriterias = append(err.FailingCriterias, InvalidUppercasePassword)
}
}
if as.passwordSettings.Number {
if !strings.ContainsAny(password, PasswordNumbers) {
err.FailingCriterias = append(err.FailingCriterias, InvalidNumberPassword)
}
}
if as.passwordSettings.Symbol {
if !strings.ContainsAny(password, PasswordSpecialChars) {
err.FailingCriterias = append(err.FailingCriterias, InvalidSymbolPassword)
}
}
if len(err.FailingCriterias) > 0 {
return err
}
return nil
}