Thanos did someting

[bytom/vapor.git] / vendor / golang.org / x / net / xsrftoken / xsrf.go

diff --git a/vendor/golang.org/x/net/xsrftoken/xsrf.go b/vendor/golang.org/x/net/xsrftoken/xsrf.go
deleted file mode 100644 (file)
index bc861e1..0000000
--- a/vendor/golang.org/x/net/xsrftoken/xsrf.go
+++ /dev/null
@@ -1,94 +0,0 @@
-// Copyright 2012 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package xsrftoken provides methods for generating and validating secure XSRF tokens.
-package xsrftoken // import "golang.org/x/net/xsrftoken"
-
-import (
-       "crypto/hmac"
-       "crypto/sha1"
-       "crypto/subtle"
-       "encoding/base64"
-       "fmt"
-       "strconv"
-       "strings"
-       "time"
-)
-
-// Timeout is the duration for which XSRF tokens are valid.
-// It is exported so clients may set cookie timeouts that match generated tokens.
-const Timeout = 24 * time.Hour
-
-// clean sanitizes a string for inclusion in a token by replacing all ":"s.
-func clean(s string) string {
-       return strings.Replace(s, ":", "_", -1)
-}
-
-// Generate returns a URL-safe secure XSRF token that expires in 24 hours.
-//
-// key is a secret key for your application; it must be non-empty.
-// userID is an optional unique identifier for the user.
-// actionID is an optional action the user is taking (e.g. POSTing to a particular path).
-func Generate(key, userID, actionID string) string {
-       return generateTokenAtTime(key, userID, actionID, time.Now())
-}
-
-// generateTokenAtTime is like Generate, but returns a token that expires 24 hours from now.
-func generateTokenAtTime(key, userID, actionID string, now time.Time) string {
-       if len(key) == 0 {
-               panic("zero length xsrf secret key")
-       }
-       // Round time up and convert to milliseconds.
-       milliTime := (now.UnixNano() + 1e6 - 1) / 1e6
-
-       h := hmac.New(sha1.New, []byte(key))
-       fmt.Fprintf(h, "%s:%s:%d", clean(userID), clean(actionID), milliTime)
-
-       // Get the padded base64 string then removing the padding.
-       tok := string(h.Sum(nil))
-       tok = base64.URLEncoding.EncodeToString([]byte(tok))
-       tok = strings.TrimRight(tok, "=")
-
-       return fmt.Sprintf("%s:%d", tok, milliTime)
-}
-
-// Valid reports whether a token is a valid, unexpired token returned by Generate.
-func Valid(token, key, userID, actionID string) bool {
-       return validTokenAtTime(token, key, userID, actionID, time.Now())
-}
-
-// validTokenAtTime reports whether a token is valid at the given time.
-func validTokenAtTime(token, key, userID, actionID string, now time.Time) bool {
-       if len(key) == 0 {
-               panic("zero length xsrf secret key")
-       }
-       // Extract the issue time of the token.
-       sep := strings.LastIndex(token, ":")
-       if sep < 0 {
-               return false
-       }
-       millis, err := strconv.ParseInt(token[sep+1:], 10, 64)
-       if err != nil {
-               return false
-       }
-       issueTime := time.Unix(0, millis*1e6)
-
-       // Check that the token is not expired.
-       if now.Sub(issueTime) >= Timeout {
-               return false
-       }
-
-       // Check that the token is not from the future.
-       // Allow 1 minute grace period in case the token is being verified on a
-       // machine whose clock is behind the machine that issued the token.
-       if issueTime.After(now.Add(1 * time.Minute)) {
-               return false
-       }
-
-       expected := generateTokenAtTime(key, userID, actionID, issueTime)
-
-       // Check that the token matches the expected value.
-       // Use constant time comparison to avoid timing attacks.
-       return subtle.ConstantTimeCompare([]byte(token), []byte(expected)) == 1
-}