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85 lines
2.6 KiB
Go
85 lines
2.6 KiB
Go
// Copyright 2014 Manu Martinez-Almeida. All rights reserved.
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// Use of this source code is governed by a MIT style
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// license that can be found in the LICENSE file.
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package gin
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import (
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"encoding/base64"
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"net/http"
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"strconv"
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"github.com/gin-gonic/gin/internal/bytesconv"
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)
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// AuthUserKey is the cookie name for user credential in basic auth.
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const AuthUserKey = "user"
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// Accounts defines a key/value for user/pass list of authorized logins.
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type Accounts map[string]string
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// authKVMap defines a key/value for Authorization token / user
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type authKVMap map[string]string
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func (a authKVMap) searchCredential(authValue string) (string, bool) {
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if authValue == "" {
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return "", false
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}
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user,ok:=a[authValue]
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if !ok{
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return "", false
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}
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return user,true
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}
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// BasicAuthForRealm returns a Basic HTTP Authorization middleware. It takes as arguments a map[string]string where
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// the key is the user name and the value is the password, as well as the name of the Realm.
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// If the realm is empty, "Authorization Required" will be used by default.
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// (see http://tools.ietf.org/html/rfc2617#section-1.2)
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func BasicAuthForRealm(accounts Accounts, realm string) HandlerFunc {
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if realm == "" {
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realm = "Authorization Required"
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}
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realm = "Basic realm=" + strconv.Quote(realm)
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pairMap := processAccounts(accounts)
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return func(c *Context) {
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// Search user in the slice of allowed credentials
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user, found := pairMap.searchCredential(c.requestHeader("Authorization"))
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if !found {
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// Credentials doesn't match, we return 401 and abort handlers chain.
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c.Header("WWW-Authenticate", realm)
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c.AbortWithStatus(http.StatusUnauthorized)
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return
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}
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// The user credentials was found, set user's id to key AuthUserKey in this context, the user's id can be read later using
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// c.MustGet(gin.AuthUserKey).
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c.Set(AuthUserKey, user)
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}
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}
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// BasicAuth returns a Basic HTTP Authorization middleware. It takes as argument a map[string]string where
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// the key is the user name and the value is the password.
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func BasicAuth(accounts Accounts) HandlerFunc {
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return BasicAuthForRealm(accounts, "")
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}
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func processAccounts(accounts Accounts) authKVMap {
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length := len(accounts)
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assert1(length > 0, "Empty list of authorized credentials")
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pairMap := make(authKVMap)
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for user, password := range accounts {
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assert1(user != "", "User can not be empty")
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value := authorizationHeader(user, password)
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pairMap[value]=user
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}
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return pairMap
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}
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func authorizationHeader(user, password string) string {
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base := user + ":" + password
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return "Basic " + base64.StdEncoding.EncodeToString(bytesconv.StringToBytes(base))
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}
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