mirror of
https://github.com/woodpecker-ci/woodpecker.git
synced 2024-12-30 10:11:23 +02:00
99 lines
2.7 KiB
Go
99 lines
2.7 KiB
Go
// Copyright 2014 Manu Martinez-Almeida. All rights reserved.
|
|
// Use of this source code is governed by a MIT style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package gin
|
|
|
|
import (
|
|
"crypto/subtle"
|
|
"encoding/base64"
|
|
"strconv"
|
|
)
|
|
|
|
const (
|
|
AuthUserKey = "user"
|
|
)
|
|
|
|
type (
|
|
Accounts map[string]string
|
|
authPair struct {
|
|
Value string
|
|
User string
|
|
}
|
|
authPairs []authPair
|
|
)
|
|
|
|
func (a authPairs) searchCredential(authValue string) (string, bool) {
|
|
if len(authValue) == 0 {
|
|
return "", false
|
|
}
|
|
for _, pair := range a {
|
|
if pair.Value == authValue {
|
|
return pair.User, true
|
|
}
|
|
}
|
|
return "", false
|
|
}
|
|
|
|
// Implements a basic Basic HTTP Authorization. It takes as arguments a map[string]string where
|
|
// the key is the user name and the value is the password, as well as the name of the Realm
|
|
// (see http://tools.ietf.org/html/rfc2617#section-1.2)
|
|
func BasicAuthForRealm(accounts Accounts, realm string) HandlerFunc {
|
|
if realm == "" {
|
|
realm = "Authorization Required"
|
|
}
|
|
realm = "Basic realm=" + strconv.Quote(realm)
|
|
pairs := processAccounts(accounts)
|
|
return func(c *Context) {
|
|
// Search user in the slice of allowed credentials
|
|
user, found := pairs.searchCredential(c.Request.Header.Get("Authorization"))
|
|
if !found {
|
|
// Credentials doesn't match, we return 401 and abort handlers chain.
|
|
c.Header("WWW-Authenticate", realm)
|
|
c.AbortWithStatus(401)
|
|
} else {
|
|
// The user credentials was found, set user's id to key AuthUserKey in this context, the userId can be read later using
|
|
// c.MustGet(gin.AuthUserKey)
|
|
c.Set(AuthUserKey, user)
|
|
}
|
|
}
|
|
}
|
|
|
|
// Implements a basic Basic HTTP Authorization. It takes as argument a map[string]string where
|
|
// the key is the user name and the value is the password.
|
|
func BasicAuth(accounts Accounts) HandlerFunc {
|
|
return BasicAuthForRealm(accounts, "")
|
|
}
|
|
|
|
func processAccounts(accounts Accounts) authPairs {
|
|
if len(accounts) == 0 {
|
|
panic("Empty list of authorized credentials")
|
|
}
|
|
pairs := make(authPairs, 0, len(accounts))
|
|
for user, password := range accounts {
|
|
if len(user) == 0 {
|
|
panic("User can not be empty")
|
|
}
|
|
value := authorizationHeader(user, password)
|
|
pairs = append(pairs, authPair{
|
|
Value: value,
|
|
User: user,
|
|
})
|
|
}
|
|
return pairs
|
|
}
|
|
|
|
func authorizationHeader(user, password string) string {
|
|
base := user + ":" + password
|
|
return "Basic " + base64.StdEncoding.EncodeToString([]byte(base))
|
|
}
|
|
|
|
func secureCompare(given, actual string) bool {
|
|
if subtle.ConstantTimeEq(int32(len(given)), int32(len(actual))) == 1 {
|
|
return subtle.ConstantTimeCompare([]byte(given), []byte(actual)) == 1
|
|
} else {
|
|
/* Securely compare actual to itself to keep constant time, but always return false */
|
|
return subtle.ConstantTimeCompare([]byte(actual), []byte(actual)) == 1 && false
|
|
}
|
|
}
|