109 lines
2.0 KiB
Go
109 lines
2.0 KiB
Go
package home
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import (
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"bytes"
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"encoding/binary"
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"io"
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"net"
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"net/http"
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"os"
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"time"
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"github.com/AdguardTeam/golibs/ioutil"
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"github.com/AdguardTeam/golibs/log"
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"github.com/josharian/native"
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)
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// GLMode - enable GL-Inet compatibility mode
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var GLMode bool
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var glFilePrefix = "/tmp/gl_token_"
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const (
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glTokenTimeoutSeconds = 3600
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glCookieName = "Admin-Token"
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)
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func glProcessRedirect(w http.ResponseWriter, r *http.Request) bool {
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if !GLMode {
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return false
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}
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// redirect to gl-inet login
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host, _, _ := net.SplitHostPort(r.Host)
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url := "http://" + host
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log.Debug("Auth: redirecting to %s", url)
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http.Redirect(w, r, url, http.StatusFound)
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return true
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}
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func glProcessCookie(r *http.Request) bool {
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if !GLMode {
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return false
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}
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glCookie, glerr := r.Cookie(glCookieName)
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if glerr != nil {
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return false
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}
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log.Debug("Auth: GL cookie value: %s", glCookie.Value)
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if glCheckToken(glCookie.Value) {
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return true
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}
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log.Info("Auth: invalid GL cookie value: %s", glCookie)
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return false
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}
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func glCheckToken(sess string) bool {
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tokenName := glFilePrefix + sess
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_, err := os.Stat(tokenName)
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if err != nil {
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log.Error("os.Stat: %s", err)
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return false
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}
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tokenDate := glGetTokenDate(tokenName)
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now := uint32(time.Now().UTC().Unix())
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return now <= (tokenDate + glTokenTimeoutSeconds)
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}
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// MaxFileSize is a maximum file length in bytes.
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const MaxFileSize = 1024 * 1024
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func glGetTokenDate(file string) uint32 {
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f, err := os.Open(file)
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if err != nil {
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log.Error("os.Open: %s", err)
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return 0
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}
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defer func() {
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derr := f.Close()
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if derr != nil {
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log.Error("glinet: closing file: %s", err)
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}
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}()
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fileReader := ioutil.LimitReader(f, MaxFileSize)
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var dateToken uint32
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// This use of ReadAll is now safe, because we limited reader.
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bs, err := io.ReadAll(fileReader)
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if err != nil {
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log.Error("reading token: %s", err)
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return 0
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}
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buf := bytes.NewBuffer(bs)
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err = binary.Read(buf, native.Endian, &dateToken)
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if err != nil {
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log.Error("decoding token: %s", err)
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return 0
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}
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return dateToken
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}
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