265 lines
12 KiB
Go
265 lines
12 KiB
Go
package validator
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import (
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"errors"
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"fmt"
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"net/url"
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"strings"
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"github.com/authelia/authelia/internal/configuration/schema"
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"github.com/authelia/authelia/internal/utils"
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)
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//nolint:gocyclo // TODO: Consider refactoring/simplifying, time permitting.
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func validateFileAuthenticationBackend(configuration *schema.FileAuthenticationBackendConfiguration, validator *schema.StructValidator) {
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if configuration.Path == "" {
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validator.Push(errors.New("Please provide a `path` for the users database in `authentication_backend`"))
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}
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if configuration.Password == nil {
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configuration.Password = &schema.DefaultPasswordConfiguration
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} else {
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if configuration.Password.Algorithm == "" {
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configuration.Password.Algorithm = schema.DefaultPasswordConfiguration.Algorithm
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} else {
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configuration.Password.Algorithm = strings.ToLower(configuration.Password.Algorithm)
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if configuration.Password.Algorithm != argon2id && configuration.Password.Algorithm != sha512 {
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validator.Push(fmt.Errorf("Unknown hashing algorithm supplied, valid values are argon2id and sha512, you configured '%s'", configuration.Password.Algorithm))
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}
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}
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// Iterations (time)
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if configuration.Password.Iterations == 0 {
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if configuration.Password.Algorithm == argon2id {
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configuration.Password.Iterations = schema.DefaultPasswordConfiguration.Iterations
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} else {
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configuration.Password.Iterations = schema.DefaultPasswordSHA512Configuration.Iterations
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}
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} else if configuration.Password.Iterations < 1 {
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validator.Push(fmt.Errorf("The number of iterations specified is invalid, must be 1 or more, you configured %d", configuration.Password.Iterations))
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}
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// Salt Length
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switch {
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case configuration.Password.SaltLength == 0:
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configuration.Password.SaltLength = schema.DefaultPasswordConfiguration.SaltLength
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case configuration.Password.SaltLength < 8:
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validator.Push(fmt.Errorf("The salt length must be 2 or more, you configured %d", configuration.Password.SaltLength))
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}
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if configuration.Password.Algorithm == argon2id {
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// Parallelism
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if configuration.Password.Parallelism == 0 {
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configuration.Password.Parallelism = schema.DefaultPasswordConfiguration.Parallelism
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} else if configuration.Password.Parallelism < 1 {
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validator.Push(fmt.Errorf("Parallelism for argon2id must be 1 or more, you configured %d", configuration.Password.Parallelism))
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}
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// Memory
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if configuration.Password.Memory == 0 {
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configuration.Password.Memory = schema.DefaultPasswordConfiguration.Memory
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} else if configuration.Password.Memory < configuration.Password.Parallelism*8 {
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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))
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}
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// Key Length
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if configuration.Password.KeyLength == 0 {
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configuration.Password.KeyLength = schema.DefaultPasswordConfiguration.KeyLength
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} else if configuration.Password.KeyLength < 16 {
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validator.Push(fmt.Errorf("Key length for argon2id must be 16, you configured %d", configuration.Password.KeyLength))
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}
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}
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}
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}
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// Wrapper for test purposes to exclude the hostname from the return.
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func validateLdapURLSimple(ldapURL string, validator *schema.StructValidator) (finalURL string) {
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finalURL, _ = validateLdapURL(ldapURL, validator)
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return finalURL
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}
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func validateLdapURL(ldapURL string, validator *schema.StructValidator) (finalURL string, hostname string) {
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parsedURL, err := url.Parse(ldapURL)
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if err != nil {
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validator.Push(errors.New("Unable to parse URL to ldap server. The scheme is probably missing: ldap:// or ldaps://"))
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return "", ""
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}
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if !(parsedURL.Scheme == schemeLDAP || parsedURL.Scheme == schemeLDAPS) {
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validator.Push(errors.New("Unknown scheme for ldap url, should be ldap:// or ldaps://"))
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return "", ""
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}
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return parsedURL.String(), parsedURL.Hostname()
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}
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//nolint:gocyclo // TODO: Consider refactoring/simplifying, time permitting.
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func validateLdapAuthenticationBackend(configuration *schema.LDAPAuthenticationBackendConfiguration, validator *schema.StructValidator) {
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if configuration.Implementation == "" {
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configuration.Implementation = schema.DefaultLDAPAuthenticationBackendConfiguration.Implementation
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}
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nilTLS := configuration.TLS == nil
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if nilTLS {
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configuration.TLS = schema.DefaultLDAPAuthenticationBackendConfiguration.TLS
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}
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// Deprecated. Maps deprecated values to the new ones. TODO: Remove in 4.28 (if block).
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if configuration.SkipVerify != nil {
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validator.PushWarning(errors.New("DEPRECATED: LDAP Auth Backend `skip_verify` option has been replaced by `authentication_backend.ldap.tls.skip_verify` (will be removed in 4.28.0)"))
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if nilTLS {
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configuration.TLS.SkipVerify = *configuration.SkipVerify
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}
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}
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// Deprecated. Maps deprecated values to the new ones. TODO: Remove in 4.28 (if block).
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if configuration.MinimumTLSVersion != "" {
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validator.PushWarning(errors.New("DEPRECATED: LDAP Auth Backend `minimum_tls_version` option has been replaced by `authentication_backend.ldap.tls.minimum_version` (will be removed in 4.28.0)"))
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if nilTLS {
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configuration.TLS.MinimumVersion = configuration.MinimumTLSVersion
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}
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}
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if configuration.TLS.MinimumVersion == "" {
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configuration.TLS.MinimumVersion = schema.DefaultLDAPAuthenticationBackendConfiguration.TLS.MinimumVersion
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}
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if _, err := utils.TLSStringToTLSConfigVersion(configuration.TLS.MinimumVersion); err != nil {
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validator.Push(fmt.Errorf("error occurred validating the LDAP minimum_tls_version key with value %s: %v", configuration.TLS.MinimumVersion, err))
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}
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switch configuration.Implementation {
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case schema.LDAPImplementationCustom:
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setDefaultImplementationCustomLdapAuthenticationBackend(configuration)
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case schema.LDAPImplementationActiveDirectory:
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setDefaultImplementationActiveDirectoryLdapAuthenticationBackend(configuration)
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default:
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validator.Push(fmt.Errorf("authentication backend ldap implementation must be blank or one of the following values `%s`, `%s`", schema.LDAPImplementationCustom, schema.LDAPImplementationActiveDirectory))
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}
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if configuration.URL == "" {
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validator.Push(errors.New("Please provide a URL to the LDAP server"))
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} else {
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ldapURL, serverName := validateLdapURL(configuration.URL, validator)
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configuration.URL = ldapURL
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if configuration.TLS.ServerName == "" {
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configuration.TLS.ServerName = serverName
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}
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}
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// 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)
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if configuration.User == "" {
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validator.Push(errors.New("Please provide a user name to connect to the LDAP server"))
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}
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// 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)
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if configuration.Password == "" {
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validator.Push(errors.New("Please provide a password to connect to the LDAP server"))
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}
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if configuration.BaseDN == "" {
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validator.Push(errors.New("Please provide a base DN to connect to the LDAP server"))
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}
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if configuration.UsersFilter == "" {
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validator.Push(errors.New("Please provide a users filter with `users_filter` attribute"))
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} else {
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if !strings.HasPrefix(configuration.UsersFilter, "(") || !strings.HasSuffix(configuration.UsersFilter, ")") {
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validator.Push(errors.New("The users filter should contain enclosing parenthesis. For instance {username_attribute}={input} should be ({username_attribute}={input})"))
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}
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if !strings.Contains(configuration.UsersFilter, "{username_attribute}") {
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validator.Push(errors.New("Unable to detect {username_attribute} placeholder in users_filter, your configuration is broken. " +
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"Please review configuration options listed at https://www.authelia.com/docs/configuration/authentication/ldap.html"))
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}
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// This test helps the user know that users_filter is broken after the breaking change induced by this commit.
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if !strings.Contains(configuration.UsersFilter, "{0}") && !strings.Contains(configuration.UsersFilter, "{input}") {
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validator.Push(errors.New("Unable to detect {input} placeholder in users_filter, your configuration might be broken. " +
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"Please review configuration options listed at https://www.authelia.com/docs/configuration/authentication/ldap.html"))
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}
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}
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if configuration.GroupsFilter == "" {
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validator.Push(errors.New("Please provide a groups filter with `groups_filter` attribute"))
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} else if !strings.HasPrefix(configuration.GroupsFilter, "(") || !strings.HasSuffix(configuration.GroupsFilter, ")") {
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validator.Push(errors.New("The groups filter should contain enclosing parenthesis. For instance cn={input} should be (cn={input})"))
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}
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}
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func setDefaultImplementationActiveDirectoryLdapAuthenticationBackend(configuration *schema.LDAPAuthenticationBackendConfiguration) {
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if configuration.UsersFilter == "" {
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configuration.UsersFilter = schema.DefaultLDAPAuthenticationBackendImplementationActiveDirectoryConfiguration.UsersFilter
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}
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if configuration.UsernameAttribute == "" {
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configuration.UsernameAttribute = schema.DefaultLDAPAuthenticationBackendImplementationActiveDirectoryConfiguration.UsernameAttribute
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}
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if configuration.DisplayNameAttribute == "" {
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configuration.DisplayNameAttribute = schema.DefaultLDAPAuthenticationBackendImplementationActiveDirectoryConfiguration.DisplayNameAttribute
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}
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if configuration.MailAttribute == "" {
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configuration.MailAttribute = schema.DefaultLDAPAuthenticationBackendImplementationActiveDirectoryConfiguration.MailAttribute
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}
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if configuration.GroupsFilter == "" {
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configuration.GroupsFilter = schema.DefaultLDAPAuthenticationBackendImplementationActiveDirectoryConfiguration.GroupsFilter
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}
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if configuration.GroupNameAttribute == "" {
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configuration.GroupNameAttribute = schema.DefaultLDAPAuthenticationBackendImplementationActiveDirectoryConfiguration.GroupNameAttribute
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}
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}
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func setDefaultImplementationCustomLdapAuthenticationBackend(configuration *schema.LDAPAuthenticationBackendConfiguration) {
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if configuration.UsernameAttribute == "" {
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configuration.UsernameAttribute = schema.DefaultLDAPAuthenticationBackendConfiguration.UsernameAttribute
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}
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if configuration.GroupNameAttribute == "" {
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configuration.GroupNameAttribute = schema.DefaultLDAPAuthenticationBackendConfiguration.GroupNameAttribute
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}
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if configuration.MailAttribute == "" {
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configuration.MailAttribute = schema.DefaultLDAPAuthenticationBackendConfiguration.MailAttribute
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}
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if configuration.DisplayNameAttribute == "" {
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configuration.DisplayNameAttribute = schema.DefaultLDAPAuthenticationBackendConfiguration.DisplayNameAttribute
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}
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}
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// ValidateAuthenticationBackend validates and update authentication backend configuration.
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func ValidateAuthenticationBackend(configuration *schema.AuthenticationBackendConfiguration, validator *schema.StructValidator) {
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if configuration.Ldap == nil && configuration.File == nil {
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validator.Push(errors.New("Please provide `ldap` or `file` object in `authentication_backend`"))
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}
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if configuration.Ldap != nil && configuration.File != nil {
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validator.Push(errors.New("You cannot provide both `ldap` and `file` objects in `authentication_backend`"))
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}
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if configuration.File != nil {
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validateFileAuthenticationBackend(configuration.File, validator)
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} else if configuration.Ldap != nil {
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validateLdapAuthenticationBackend(configuration.Ldap, validator)
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}
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if configuration.RefreshInterval == "" {
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configuration.RefreshInterval = schema.RefreshIntervalDefault
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} else {
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_, err := utils.ParseDurationString(configuration.RefreshInterval)
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if err != nil && configuration.RefreshInterval != schema.ProfileRefreshDisabled && configuration.RefreshInterval != schema.ProfileRefreshAlways {
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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))
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}
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}
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}
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