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package validator
import (
"errors"
"fmt"
"net/url"
"strings"
"github.com/authelia/authelia/internal/configuration/schema"
"github.com/authelia/authelia/internal/utils"
)
//nolint:gocyclo // TODO: Consider refactoring/simplifying, time permitting
func validateFileAuthenticationBackend(configuration *schema.FileAuthenticationBackendConfiguration, validator *schema.StructValidator) {
if configuration.Path == "" {
validator.Push(errors.New("Please provide a `path` for the users database in `authentication_backend`"))
}
if configuration.Password == nil {
configuration.Password = &schema.DefaultPasswordConfiguration
} else {
if configuration.Password.Algorithm == "" {
configuration.Password.Algorithm = schema.DefaultPasswordConfiguration.Algorithm
} else {
configuration.Password.Algorithm = strings.ToLower(configuration.Password.Algorithm)
if configuration.Password.Algorithm != argon2id && configuration.Password.Algorithm != sha512 {
validator.Push(fmt.Errorf("Unknown hashing algorithm supplied, valid values are argon2id and sha512, you configured '%s'", configuration.Password.Algorithm))
}
}
// Iterations (time)
if configuration.Password.Iterations == 0 {
if configuration.Password.Algorithm == argon2id {
configuration.Password.Iterations = schema.DefaultPasswordConfiguration.Iterations
} else {
configuration.Password.Iterations = schema.DefaultPasswordSHA512Configuration.Iterations
}
} else if configuration.Password.Iterations < 1 {
validator.Push(fmt.Errorf("The number of iterations specified is invalid, must be 1 or more, you configured %d", configuration.Password.Iterations))
}
//Salt Length
if configuration.Password.SaltLength == 0 {
configuration.Password.SaltLength = schema.DefaultPasswordConfiguration.SaltLength
} else if configuration.Password.SaltLength < 2 {
validator.Push(fmt.Errorf("The salt length must be 2 or more, you configured %d", configuration.Password.SaltLength))
} else if configuration.Password.SaltLength > 16 {
validator.Push(fmt.Errorf("The salt length must be 16 or less, you configured %d", configuration.Password.SaltLength))
}
if configuration.Password.Algorithm == argon2id {
// Parallelism
if configuration.Password.Parallelism == 0 {
configuration.Password.Parallelism = schema.DefaultPasswordConfiguration.Parallelism
} else if configuration.Password.Parallelism < 1 {
validator.Push(fmt.Errorf("Parallelism for argon2id must be 1 or more, you configured %d", configuration.Password.Parallelism))
}
// Memory
if configuration.Password.Memory == 0 {
configuration.Password.Memory = schema.DefaultPasswordConfiguration.Memory
} else if configuration.Password.Memory < configuration.Password.Parallelism*8 {
validator.Push(fmt.Errorf("Memory for argon2id must be %d or more (parallelism * 8), you configured memory as %d and parallelism as %d", configuration.Password.Parallelism*8, configuration.Password.Memory, configuration.Password.Parallelism))
}
// Key Length
if configuration.Password.KeyLength == 0 {
configuration.Password.KeyLength = schema.DefaultPasswordConfiguration.KeyLength
} else if configuration.Password.KeyLength < 16 {
validator.Push(fmt.Errorf("Key length for argon2id must be 16, you configured %d", configuration.Password.KeyLength))
}
}
}
}
func validateLdapURL(ldapURL string, validator *schema.StructValidator) string {
u, err := url.Parse(ldapURL)
if err != nil {
validator.Push(errors.New("Unable to parse URL to ldap server. The scheme is probably missing: ldap:// or ldaps://"))
return ""
}
if !(u.Scheme == schemeLDAP || u.Scheme == schemeLDAPS) {
validator.Push(errors.New("Unknown scheme for ldap url, should be ldap:// or ldaps://"))
return ""
}
if u.Scheme == schemeLDAP && u.Port() == "" {
u.Host += ":389"
} else if u.Scheme == schemeLDAPS && u.Port() == "" {
u.Host += ":636"
}
if !u.IsAbs() {
validator.Push(fmt.Errorf("URL to LDAP %s is still not absolute, it should be something like ldap://127.0.0.1:389", u.String()))
}
return u.String()
}
//nolint:gocyclo // TODO: Consider refactoring/simplifying, time permitting
func validateLdapAuthenticationBackend(configuration *schema.LDAPAuthenticationBackendConfiguration, validator *schema.StructValidator) {
if configuration.URL == "" {
validator.Push(errors.New("Please provide a URL to the LDAP server"))
} else {
configuration.URL = validateLdapURL(configuration.URL, validator)
}
// TODO: see if it's possible to disable this check if disable_reset_password is set and when anonymous/user binding is supported (#101 and #387)
if configuration.User == "" {
validator.Push(errors.New("Please provide a user name to connect to the LDAP server"))
}
// TODO: see if it's possible to disable this check if disable_reset_password is set and when anonymous/user binding is supported (#101 and #387)
if configuration.Password == "" {
validator.Push(errors.New("Please provide a password to connect to the LDAP server"))
}
if configuration.BaseDN == "" {
validator.Push(errors.New("Please provide a base DN to connect to the LDAP server"))
}
if configuration.UsersFilter == "" {
validator.Push(errors.New("Please provide a users filter with `users_filter` attribute"))
} else {
if !strings.HasPrefix(configuration.UsersFilter, "(") || !strings.HasSuffix(configuration.UsersFilter, ")") {
validator.Push(errors.New("The users filter should contain enclosing parenthesis. For instance uid={input} should be (uid={input})"))
}
// This test helps the user know that users_filter is broken after the breaking change induced by this commit.
if !strings.Contains(configuration.UsersFilter, "{0}") && !strings.Contains(configuration.UsersFilter, "{input}") {
validator.Push(errors.New("Unable to detect {input} placeholder in users_filter, your configuration might be broken. " +
"Please review configuration options listed at https://docs.authelia.com/configuration/authentication/ldap.html"))
}
}
if configuration.GroupsFilter == "" {
validator.Push(errors.New("Please provide a groups filter with `groups_filter` attribute"))
} else {
if !strings.HasPrefix(configuration.GroupsFilter, "(") || !strings.HasSuffix(configuration.GroupsFilter, ")") {
validator.Push(errors.New("The groups filter should contain enclosing parenthesis. For instance cn={input} should be (cn={input})"))
}
}
if configuration.UsernameAttribute == "" {
validator.Push(errors.New("Please provide a username attribute with `username_attribute`"))
}
if configuration.GroupNameAttribute == "" {
configuration.GroupNameAttribute = schema.DefaultLDAPAuthenticationBackendConfiguration.GroupNameAttribute
}
if configuration.MailAttribute == "" {
configuration.MailAttribute = schema.DefaultLDAPAuthenticationBackendConfiguration.MailAttribute
}
}
// ValidateAuthenticationBackend validates and update authentication backend configuration.
func ValidateAuthenticationBackend(configuration *schema.AuthenticationBackendConfiguration, validator *schema.StructValidator) {
if configuration.Ldap == nil && configuration.File == nil {
validator.Push(errors.New("Please provide `ldap` or `file` object in `authentication_backend`"))
}
if configuration.Ldap != nil && configuration.File != nil {
validator.Push(errors.New("You cannot provide both `ldap` and `file` objects in `authentication_backend`"))
}
if configuration.File != nil {
validateFileAuthenticationBackend(configuration.File, validator)
} else if configuration.Ldap != nil {
validateLdapAuthenticationBackend(configuration.Ldap, validator)
}
if configuration.RefreshInterval == "" {
configuration.RefreshInterval = schema.RefreshIntervalDefault
} else {
_, err := utils.ParseDurationString(configuration.RefreshInterval)
if err != nil && configuration.RefreshInterval != schema.ProfileRefreshDisabled && configuration.RefreshInterval != schema.ProfileRefreshAlways {
validator.Push(fmt.Errorf("Auth Backend `refresh_interval` is configured to '%s' but it must be either a duration notation or one of 'disable', or 'always'. Error from parser: %s", configuration.RefreshInterval, err))
}
}
}
|
