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Change all license headers to comply with REUSE specification. Fix #16132 Co-authored-by: flynnnnnnnnnn <flynnnnnnnnnn@github> Co-authored-by: John Olheiser <john.olheiser@gmail.com>
127 lines
3.0 KiB
Go
127 lines
3.0 KiB
Go
// Copyright 2019 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package password
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import (
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"bytes"
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goContext "context"
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"crypto/rand"
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"math/big"
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"strings"
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"sync"
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"code.gitea.io/gitea/modules/context"
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"code.gitea.io/gitea/modules/setting"
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)
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// complexity contains information about a particular kind of password complexity
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type complexity struct {
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ValidChars string
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TrNameOne string
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}
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var (
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matchComplexityOnce sync.Once
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validChars string
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requiredList []complexity
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charComplexities = map[string]complexity{
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"lower": {
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`abcdefghijklmnopqrstuvwxyz`,
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"form.password_lowercase_one",
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},
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"upper": {
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`ABCDEFGHIJKLMNOPQRSTUVWXYZ`,
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"form.password_uppercase_one",
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},
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"digit": {
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`0123456789`,
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"form.password_digit_one",
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},
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"spec": {
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` !"#$%&'()*+,-./:;<=>?@[\]^_{|}~` + "`",
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"form.password_special_one",
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},
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}
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)
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// NewComplexity for preparation
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func NewComplexity() {
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matchComplexityOnce.Do(func() {
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setupComplexity(setting.PasswordComplexity)
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})
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}
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func setupComplexity(values []string) {
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if len(values) != 1 || values[0] != "off" {
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for _, val := range values {
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if complex, ok := charComplexities[val]; ok {
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validChars += complex.ValidChars
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requiredList = append(requiredList, complex)
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}
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}
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if len(requiredList) == 0 {
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// No valid character classes found; use all classes as default
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for _, complex := range charComplexities {
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validChars += complex.ValidChars
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requiredList = append(requiredList, complex)
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}
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}
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}
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if validChars == "" {
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// No complexities to check; provide a sensible default for password generation
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validChars = charComplexities["lower"].ValidChars + charComplexities["upper"].ValidChars + charComplexities["digit"].ValidChars
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}
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}
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// IsComplexEnough return True if password meets complexity settings
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func IsComplexEnough(pwd string) bool {
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NewComplexity()
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if len(validChars) > 0 {
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for _, req := range requiredList {
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if !strings.ContainsAny(req.ValidChars, pwd) {
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return false
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}
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}
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}
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return true
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}
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// Generate a random password
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func Generate(n int) (string, error) {
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NewComplexity()
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buffer := make([]byte, n)
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max := big.NewInt(int64(len(validChars)))
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for {
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for j := 0; j < n; j++ {
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rnd, err := rand.Int(rand.Reader, max)
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if err != nil {
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return "", err
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}
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buffer[j] = validChars[rnd.Int64()]
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}
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pwned, err := IsPwned(goContext.Background(), string(buffer))
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if err != nil {
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return "", err
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}
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if IsComplexEnough(string(buffer)) && !pwned && string(buffer[0]) != " " && string(buffer[n-1]) != " " {
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return string(buffer), nil
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}
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}
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}
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// BuildComplexityError builds the error message when password complexity checks fail
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func BuildComplexityError(ctx *context.Context) string {
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var buffer bytes.Buffer
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buffer.WriteString(ctx.Tr("form.password_complexity"))
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buffer.WriteString("<ul>")
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for _, c := range requiredList {
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buffer.WriteString("<li>")
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buffer.WriteString(ctx.Tr(c.TrNameOne))
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buffer.WriteString("</li>")
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}
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buffer.WriteString("</ul>")
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return buffer.String()
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}
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