131 lines
3.2 KiB
Go
131 lines
3.2 KiB
Go
// Copyright 2016 The Gogs Authors. All rights reserved.
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// Copyright 2020 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package validation
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import (
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"fmt"
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"net/mail"
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"regexp"
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"strings"
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"code.gitea.io/gitea/modules/setting"
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"code.gitea.io/gitea/modules/util"
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"github.com/gobwas/glob"
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)
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// ErrEmailNotActivated e-mail address has not been activated error
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var ErrEmailNotActivated = util.NewInvalidArgumentErrorf("e-mail address has not been activated")
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// ErrEmailCharIsNotSupported e-mail address contains unsupported character
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type ErrEmailCharIsNotSupported struct {
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Email string
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}
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// IsErrEmailCharIsNotSupported checks if an error is an ErrEmailCharIsNotSupported
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func IsErrEmailCharIsNotSupported(err error) bool {
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_, ok := err.(ErrEmailCharIsNotSupported)
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return ok
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}
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func (err ErrEmailCharIsNotSupported) Error() string {
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return fmt.Sprintf("e-mail address contains unsupported character [email: %s]", err.Email)
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}
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// ErrEmailInvalid represents an error where the email address does not comply with RFC 5322
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// or has a leading '-' character
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type ErrEmailInvalid struct {
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Email string
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}
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// IsErrEmailInvalid checks if an error is an ErrEmailInvalid
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func IsErrEmailInvalid(err error) bool {
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_, ok := err.(ErrEmailInvalid)
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return ok
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}
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func (err ErrEmailInvalid) Error() string {
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return fmt.Sprintf("e-mail invalid [email: %s]", err.Email)
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}
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func (err ErrEmailInvalid) Unwrap() error {
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return util.ErrInvalidArgument
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}
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var emailRegexp = regexp.MustCompile("^[a-zA-Z0-9.!#$%&'*+-/=?^_`{|}~]*@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$")
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// check if email is a valid address with allowed domain
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func ValidateEmail(email string) error {
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if err := validateEmailBasic(email); err != nil {
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return err
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}
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return validateEmailDomain(email)
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}
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// check if email is a valid address when admins manually add or edit users
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func ValidateEmailForAdmin(email string) error {
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return validateEmailBasic(email)
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// In this case we do not need to check the email domain
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}
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// validateEmailBasic checks whether the email complies with the rules
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func validateEmailBasic(email string) error {
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if len(email) == 0 {
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return ErrEmailInvalid{email}
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}
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if !emailRegexp.MatchString(email) {
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return ErrEmailCharIsNotSupported{email}
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}
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if email[0] == '-' {
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return ErrEmailInvalid{email}
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}
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if _, err := mail.ParseAddress(email); err != nil {
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return ErrEmailInvalid{email}
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}
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return nil
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}
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func validateEmailDomain(email string) error {
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if !IsEmailDomainAllowed(email) {
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return ErrEmailInvalid{email}
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}
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return nil
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}
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func IsEmailDomainAllowed(email string) bool {
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if len(setting.Service.EmailDomainAllowList) == 0 {
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return !isEmailDomainListed(setting.Service.EmailDomainBlockList, email)
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}
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return isEmailDomainListed(setting.Service.EmailDomainAllowList, email)
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}
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// isEmailDomainListed checks whether the domain of an email address
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// matches a list of domains
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func isEmailDomainListed(globs []glob.Glob, email string) bool {
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if len(globs) == 0 {
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return false
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}
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n := strings.LastIndex(email, "@")
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if n <= 0 {
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return false
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}
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domain := strings.ToLower(email[n+1:])
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for _, g := range globs {
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if g.Match(domain) {
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return true
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}
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}
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return false
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}
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