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gitea/vendor/github.com/go-openapi/runtime/security/authenticator.go

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// Copyright 2015 go-swagger maintainers
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package security
import (
"context"
"net/http"
"strings"
"github.com/go-openapi/errors"
"github.com/go-openapi/runtime"
)
const (
query = "query"
header = "header"
)
// HttpAuthenticator is a function that authenticates a HTTP request
func HttpAuthenticator(handler func(*http.Request) (bool, interface{}, error)) runtime.Authenticator {
return runtime.AuthenticatorFunc(func(params interface{}) (bool, interface{}, error) {
if request, ok := params.(*http.Request); ok {
return handler(request)
}
if scoped, ok := params.(*ScopedAuthRequest); ok {
return handler(scoped.Request)
}
return false, nil, nil
})
}
// ScopedAuthenticator is a function that authenticates a HTTP request against a list of valid scopes
func ScopedAuthenticator(handler func(*ScopedAuthRequest) (bool, interface{}, error)) runtime.Authenticator {
return runtime.AuthenticatorFunc(func(params interface{}) (bool, interface{}, error) {
if request, ok := params.(*ScopedAuthRequest); ok {
return handler(request)
}
return false, nil, nil
})
}
// UserPassAuthentication authentication function
type UserPassAuthentication func(string, string) (interface{}, error)
// UserPassAuthenticationCtx authentication function with context.Context
type UserPassAuthenticationCtx func(context.Context, string, string) (context.Context, interface{}, error)
// TokenAuthentication authentication function
type TokenAuthentication func(string) (interface{}, error)
// TokenAuthenticationCtx authentication function with context.Context
type TokenAuthenticationCtx func(context.Context, string) (context.Context, interface{}, error)
// ScopedTokenAuthentication authentication function
type ScopedTokenAuthentication func(string, []string) (interface{}, error)
// ScopedTokenAuthenticationCtx authentication function with context.Context
type ScopedTokenAuthenticationCtx func(context.Context, string, []string) (context.Context, interface{}, error)
var DefaultRealmName = "API"
type secCtxKey uint8
const (
failedBasicAuth secCtxKey = iota
oauth2SchemeName
)
func FailedBasicAuth(r *http.Request) string {
return FailedBasicAuthCtx(r.Context())
}
func FailedBasicAuthCtx(ctx context.Context) string {
v, ok := ctx.Value(failedBasicAuth).(string)
if !ok {
return ""
}
return v
}
func OAuth2SchemeName(r *http.Request) string {
return OAuth2SchemeNameCtx(r.Context())
}
func OAuth2SchemeNameCtx(ctx context.Context) string {
v, ok := ctx.Value(oauth2SchemeName).(string)
if !ok {
return ""
}
return v
}
// BasicAuth creates a basic auth authenticator with the provided authentication function
func BasicAuth(authenticate UserPassAuthentication) runtime.Authenticator {
return BasicAuthRealm(DefaultRealmName, authenticate)
}
// BasicAuthRealm creates a basic auth authenticator with the provided authentication function and realm name
func BasicAuthRealm(realm string, authenticate UserPassAuthentication) runtime.Authenticator {
if realm == "" {
realm = DefaultRealmName
}
return HttpAuthenticator(func(r *http.Request) (bool, interface{}, error) {
if usr, pass, ok := r.BasicAuth(); ok {
p, err := authenticate(usr, pass)
if err != nil {
*r = *r.WithContext(context.WithValue(r.Context(), failedBasicAuth, realm))
}
return true, p, err
}
*r = *r.WithContext(context.WithValue(r.Context(), failedBasicAuth, realm))
return false, nil, nil
})
}
// BasicAuthCtx creates a basic auth authenticator with the provided authentication function with support for context.Context
func BasicAuthCtx(authenticate UserPassAuthenticationCtx) runtime.Authenticator {
return BasicAuthRealmCtx(DefaultRealmName, authenticate)
}
// BasicAuthRealmCtx creates a basic auth authenticator with the provided authentication function and realm name with support for context.Context
func BasicAuthRealmCtx(realm string, authenticate UserPassAuthenticationCtx) runtime.Authenticator {
if realm == "" {
realm = DefaultRealmName
}
return HttpAuthenticator(func(r *http.Request) (bool, interface{}, error) {
if usr, pass, ok := r.BasicAuth(); ok {
ctx, p, err := authenticate(r.Context(), usr, pass)
if err != nil {
ctx = context.WithValue(ctx, failedBasicAuth, realm)
}
*r = *r.WithContext(ctx)
return true, p, err
}
*r = *r.WithContext(context.WithValue(r.Context(), failedBasicAuth, realm))
return false, nil, nil
})
}
// APIKeyAuth creates an authenticator that uses a token for authorization.
// This token can be obtained from either a header or a query string
func APIKeyAuth(name, in string, authenticate TokenAuthentication) runtime.Authenticator {
inl := strings.ToLower(in)
if inl != query && inl != header {
// panic because this is most likely a typo
panic(errors.New(500, "api key auth: in value needs to be either \"query\" or \"header\"."))
}
var getToken func(*http.Request) string
switch inl {
case header:
getToken = func(r *http.Request) string { return r.Header.Get(name) }
case query:
getToken = func(r *http.Request) string { return r.URL.Query().Get(name) }
}
return HttpAuthenticator(func(r *http.Request) (bool, interface{}, error) {
token := getToken(r)
if token == "" {
return false, nil, nil
}
p, err := authenticate(token)
return true, p, err
})
}
// APIKeyAuthCtx creates an authenticator that uses a token for authorization with support for context.Context.
// This token can be obtained from either a header or a query string
func APIKeyAuthCtx(name, in string, authenticate TokenAuthenticationCtx) runtime.Authenticator {
inl := strings.ToLower(in)
if inl != query && inl != header {
// panic because this is most likely a typo
panic(errors.New(500, "api key auth: in value needs to be either \"query\" or \"header\"."))
}
var getToken func(*http.Request) string
switch inl {
case header:
getToken = func(r *http.Request) string { return r.Header.Get(name) }
case query:
getToken = func(r *http.Request) string { return r.URL.Query().Get(name) }
}
return HttpAuthenticator(func(r *http.Request) (bool, interface{}, error) {
token := getToken(r)
if token == "" {
return false, nil, nil
}
ctx, p, err := authenticate(r.Context(), token)
*r = *r.WithContext(ctx)
return true, p, err
})
}
// ScopedAuthRequest contains both a http request and the required scopes for a particular operation
type ScopedAuthRequest struct {
Request *http.Request
RequiredScopes []string
}
// BearerAuth for use with oauth2 flows
func BearerAuth(name string, authenticate ScopedTokenAuthentication) runtime.Authenticator {
const prefix = "Bearer "
return ScopedAuthenticator(func(r *ScopedAuthRequest) (bool, interface{}, error) {
var token string
hdr := r.Request.Header.Get("Authorization")
if strings.HasPrefix(hdr, prefix) {
token = strings.TrimPrefix(hdr, prefix)
}
if token == "" {
qs := r.Request.URL.Query()
token = qs.Get("access_token")
}
//#nosec
ct, _, _ := runtime.ContentType(r.Request.Header)
if token == "" && (ct == "application/x-www-form-urlencoded" || ct == "multipart/form-data") {
token = r.Request.FormValue("access_token")
}
if token == "" {
return false, nil, nil
}
rctx := context.WithValue(r.Request.Context(), oauth2SchemeName, name)
*r.Request = *r.Request.WithContext(rctx)
p, err := authenticate(token, r.RequiredScopes)
return true, p, err
})
}
// BearerAuthCtx for use with oauth2 flows with support for context.Context.
func BearerAuthCtx(name string, authenticate ScopedTokenAuthenticationCtx) runtime.Authenticator {
const prefix = "Bearer "
return ScopedAuthenticator(func(r *ScopedAuthRequest) (bool, interface{}, error) {
var token string
hdr := r.Request.Header.Get("Authorization")
if strings.HasPrefix(hdr, prefix) {
token = strings.TrimPrefix(hdr, prefix)
}
if token == "" {
qs := r.Request.URL.Query()
token = qs.Get("access_token")
}
//#nosec
ct, _, _ := runtime.ContentType(r.Request.Header)
if token == "" && (ct == "application/x-www-form-urlencoded" || ct == "multipart/form-data") {
token = r.Request.FormValue("access_token")
}
if token == "" {
return false, nil, nil
}
rctx := context.WithValue(r.Request.Context(), oauth2SchemeName, name)
ctx, p, err := authenticate(rctx, token, r.RequiredScopes)
*r.Request = *r.Request.WithContext(ctx)
return true, p, err
})
}