122 lines
4.2 KiB
Go
122 lines
4.2 KiB
Go
package http
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import (
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"bytes"
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"html/template"
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"log"
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"github.com/rclone/rclone/fs"
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"github.com/rclone/rclone/fs/config/flags"
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"github.com/spf13/pflag"
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)
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// AuthHelp returns text describing the http authentication to add to the command help.
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func AuthHelp(prefix string) string {
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help := `#### Authentication
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By default this will serve files without needing a login.
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You can either use an htpasswd file which can take lots of users, or
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set a single username and password with the ` + "`--{{ .Prefix }}user` and `--{{ .Prefix }}pass`" + ` flags.
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If no static users are configured by either of the above methods, and client
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certificates are required by the ` + "`--client-ca`" + ` flag passed to the server, the
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client certificate common name will be considered as the username.
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Use ` + "`--{{ .Prefix }}htpasswd /path/to/htpasswd`" + ` to provide an htpasswd file. This is
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in standard apache format and supports MD5, SHA1 and BCrypt for basic
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authentication. Bcrypt is recommended.
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To create an htpasswd file:
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touch htpasswd
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htpasswd -B htpasswd user
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htpasswd -B htpasswd anotherUser
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The password file can be updated while rclone is running.
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Use ` + "`--{{ .Prefix }}realm`" + ` to set the authentication realm.
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Use ` + "`--{{ .Prefix }}salt`" + ` to change the password hashing salt from the default.
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`
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tmpl, err := template.New("auth help").Parse(help)
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if err != nil {
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log.Fatal("Fatal error parsing template", err)
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}
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data := struct {
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Prefix string
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}{
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Prefix: prefix,
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}
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buf := &bytes.Buffer{}
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err = tmpl.Execute(buf, data)
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if err != nil {
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log.Fatal("Fatal error executing template", err)
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}
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return buf.String()
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}
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// CustomAuthFn if used will be used to authenticate user, pass. If an error
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// is returned then the user is not authenticated.
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//
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// If a non nil value is returned then it is added to the context under the key
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type CustomAuthFn func(user, pass string) (value interface{}, err error)
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// AuthConfigInfo descripts the Options in use
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var AuthConfigInfo = fs.Options{{
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Name: "htpasswd",
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Default: "",
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Help: "A htpasswd file - if not provided no authentication is done",
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}, {
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Name: "realm",
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Default: "",
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Help: "Realm for authentication",
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}, {
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Name: "user",
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Default: "",
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Help: "User name for authentication",
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}, {
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Name: "pass",
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Default: "",
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Help: "Password for authentication",
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}, {
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Name: "salt",
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Default: "dlPL2MqE",
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Help: "Password hashing salt",
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}}
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// AuthConfig contains options for the http authentication
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type AuthConfig struct {
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HtPasswd string `config:"htpasswd"` // htpasswd file - if not provided no authentication is done
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Realm string `config:"realm"` // realm for authentication
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BasicUser string `config:"user"` // single username for basic auth if not using Htpasswd
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BasicPass string `config:"pass"` // password for BasicUser
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Salt string `config:"salt"` // password hashing salt
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CustomAuthFn CustomAuthFn `json:"-" config:"-"` // custom Auth (not set by command line flags)
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}
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// AddFlagsPrefix adds flags to the flag set for AuthConfig
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func (cfg *AuthConfig) AddFlagsPrefix(flagSet *pflag.FlagSet, prefix string) {
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flags.StringVarP(flagSet, &cfg.HtPasswd, prefix+"htpasswd", "", cfg.HtPasswd, "A htpasswd file - if not provided no authentication is done", prefix)
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flags.StringVarP(flagSet, &cfg.Realm, prefix+"realm", "", cfg.Realm, "Realm for authentication", prefix)
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flags.StringVarP(flagSet, &cfg.BasicUser, prefix+"user", "", cfg.BasicUser, "User name for authentication", prefix)
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flags.StringVarP(flagSet, &cfg.BasicPass, prefix+"pass", "", cfg.BasicPass, "Password for authentication", prefix)
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flags.StringVarP(flagSet, &cfg.Salt, prefix+"salt", "", cfg.Salt, "Password hashing salt", prefix)
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}
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// AddAuthFlagsPrefix adds flags to the flag set for AuthConfig
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func AddAuthFlagsPrefix(flagSet *pflag.FlagSet, prefix string, cfg *AuthConfig) {
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cfg.AddFlagsPrefix(flagSet, prefix)
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}
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// DefaultAuthCfg returns a new config which can be customized by command line flags
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//
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// Note that this needs to be kept in sync with AuthConfigInfo above and
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// can be removed when all callers have been converted.
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func DefaultAuthCfg() AuthConfig {
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return AuthConfig{
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Salt: "dlPL2MqE",
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}
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}
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