mirror of
https://github.com/go-gitea/gitea.git
synced 2024-12-15 05:42:47 +08:00
503 lines
16 KiB
Go
503 lines
16 KiB
Go
// Copyright 2019 The Gitea Authors. All rights reserved.
|
|
// Use of this source code is governed by a MIT-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package user
|
|
|
|
import (
|
|
"encoding/base64"
|
|
"fmt"
|
|
"net/url"
|
|
"strings"
|
|
|
|
"code.gitea.io/gitea/models"
|
|
"code.gitea.io/gitea/modules/auth"
|
|
"code.gitea.io/gitea/modules/base"
|
|
"code.gitea.io/gitea/modules/context"
|
|
"code.gitea.io/gitea/modules/log"
|
|
"code.gitea.io/gitea/modules/setting"
|
|
"code.gitea.io/gitea/modules/timeutil"
|
|
|
|
"gitea.com/macaron/binding"
|
|
"github.com/dgrijalva/jwt-go"
|
|
)
|
|
|
|
const (
|
|
tplGrantAccess base.TplName = "user/auth/grant"
|
|
tplGrantError base.TplName = "user/auth/grant_error"
|
|
)
|
|
|
|
// TODO move error and responses to SDK or models
|
|
|
|
// AuthorizeErrorCode represents an error code specified in RFC 6749
|
|
type AuthorizeErrorCode string
|
|
|
|
const (
|
|
// ErrorCodeInvalidRequest represents the according error in RFC 6749
|
|
ErrorCodeInvalidRequest AuthorizeErrorCode = "invalid_request"
|
|
// ErrorCodeUnauthorizedClient represents the according error in RFC 6749
|
|
ErrorCodeUnauthorizedClient AuthorizeErrorCode = "unauthorized_client"
|
|
// ErrorCodeAccessDenied represents the according error in RFC 6749
|
|
ErrorCodeAccessDenied AuthorizeErrorCode = "access_denied"
|
|
// ErrorCodeUnsupportedResponseType represents the according error in RFC 6749
|
|
ErrorCodeUnsupportedResponseType AuthorizeErrorCode = "unsupported_response_type"
|
|
// ErrorCodeInvalidScope represents the according error in RFC 6749
|
|
ErrorCodeInvalidScope AuthorizeErrorCode = "invalid_scope"
|
|
// ErrorCodeServerError represents the according error in RFC 6749
|
|
ErrorCodeServerError AuthorizeErrorCode = "server_error"
|
|
// ErrorCodeTemporaryUnavailable represents the according error in RFC 6749
|
|
ErrorCodeTemporaryUnavailable AuthorizeErrorCode = "temporarily_unavailable"
|
|
)
|
|
|
|
// AuthorizeError represents an error type specified in RFC 6749
|
|
type AuthorizeError struct {
|
|
ErrorCode AuthorizeErrorCode `json:"error" form:"error"`
|
|
ErrorDescription string
|
|
State string
|
|
}
|
|
|
|
// Error returns the error message
|
|
func (err AuthorizeError) Error() string {
|
|
return fmt.Sprintf("%s: %s", err.ErrorCode, err.ErrorDescription)
|
|
}
|
|
|
|
// AccessTokenErrorCode represents an error code specified in RFC 6749
|
|
type AccessTokenErrorCode string
|
|
|
|
const (
|
|
// AccessTokenErrorCodeInvalidRequest represents an error code specified in RFC 6749
|
|
AccessTokenErrorCodeInvalidRequest AccessTokenErrorCode = "invalid_request"
|
|
// AccessTokenErrorCodeInvalidClient represents an error code specified in RFC 6749
|
|
AccessTokenErrorCodeInvalidClient = "invalid_client"
|
|
// AccessTokenErrorCodeInvalidGrant represents an error code specified in RFC 6749
|
|
AccessTokenErrorCodeInvalidGrant = "invalid_grant"
|
|
// AccessTokenErrorCodeUnauthorizedClient represents an error code specified in RFC 6749
|
|
AccessTokenErrorCodeUnauthorizedClient = "unauthorized_client"
|
|
// AccessTokenErrorCodeUnsupportedGrantType represents an error code specified in RFC 6749
|
|
AccessTokenErrorCodeUnsupportedGrantType = "unsupported_grant_type"
|
|
// AccessTokenErrorCodeInvalidScope represents an error code specified in RFC 6749
|
|
AccessTokenErrorCodeInvalidScope = "invalid_scope"
|
|
)
|
|
|
|
// AccessTokenError represents an error response specified in RFC 6749
|
|
type AccessTokenError struct {
|
|
ErrorCode AccessTokenErrorCode `json:"error" form:"error"`
|
|
ErrorDescription string `json:"error_description"`
|
|
}
|
|
|
|
// Error returns the error message
|
|
func (err AccessTokenError) Error() string {
|
|
return fmt.Sprintf("%s: %s", err.ErrorCode, err.ErrorDescription)
|
|
}
|
|
|
|
// TokenType specifies the kind of token
|
|
type TokenType string
|
|
|
|
const (
|
|
// TokenTypeBearer represents a token type specified in RFC 6749
|
|
TokenTypeBearer TokenType = "bearer"
|
|
// TokenTypeMAC represents a token type specified in RFC 6749
|
|
TokenTypeMAC = "mac"
|
|
)
|
|
|
|
// AccessTokenResponse represents a successful access token response
|
|
type AccessTokenResponse struct {
|
|
AccessToken string `json:"access_token"`
|
|
TokenType TokenType `json:"token_type"`
|
|
ExpiresIn int64 `json:"expires_in"`
|
|
RefreshToken string `json:"refresh_token"`
|
|
}
|
|
|
|
func newAccessTokenResponse(grant *models.OAuth2Grant) (*AccessTokenResponse, *AccessTokenError) {
|
|
if setting.OAuth2.InvalidateRefreshTokens {
|
|
if err := grant.IncreaseCounter(); err != nil {
|
|
return nil, &AccessTokenError{
|
|
ErrorCode: AccessTokenErrorCodeInvalidGrant,
|
|
ErrorDescription: "cannot increase the grant counter",
|
|
}
|
|
}
|
|
}
|
|
// generate access token to access the API
|
|
expirationDate := timeutil.TimeStampNow().Add(setting.OAuth2.AccessTokenExpirationTime)
|
|
accessToken := &models.OAuth2Token{
|
|
GrantID: grant.ID,
|
|
Type: models.TypeAccessToken,
|
|
StandardClaims: jwt.StandardClaims{
|
|
ExpiresAt: expirationDate.AsTime().Unix(),
|
|
},
|
|
}
|
|
signedAccessToken, err := accessToken.SignToken()
|
|
if err != nil {
|
|
return nil, &AccessTokenError{
|
|
ErrorCode: AccessTokenErrorCodeInvalidRequest,
|
|
ErrorDescription: "cannot sign token",
|
|
}
|
|
}
|
|
|
|
// generate refresh token to request an access token after it expired later
|
|
refreshExpirationDate := timeutil.TimeStampNow().Add(setting.OAuth2.RefreshTokenExpirationTime * 60 * 60).AsTime().Unix()
|
|
refreshToken := &models.OAuth2Token{
|
|
GrantID: grant.ID,
|
|
Counter: grant.Counter,
|
|
Type: models.TypeRefreshToken,
|
|
StandardClaims: jwt.StandardClaims{
|
|
ExpiresAt: refreshExpirationDate,
|
|
},
|
|
}
|
|
signedRefreshToken, err := refreshToken.SignToken()
|
|
if err != nil {
|
|
return nil, &AccessTokenError{
|
|
ErrorCode: AccessTokenErrorCodeInvalidRequest,
|
|
ErrorDescription: "cannot sign token",
|
|
}
|
|
}
|
|
|
|
return &AccessTokenResponse{
|
|
AccessToken: signedAccessToken,
|
|
TokenType: TokenTypeBearer,
|
|
ExpiresIn: setting.OAuth2.AccessTokenExpirationTime,
|
|
RefreshToken: signedRefreshToken,
|
|
}, nil
|
|
}
|
|
|
|
// AuthorizeOAuth manages authorize requests
|
|
func AuthorizeOAuth(ctx *context.Context, form auth.AuthorizationForm) {
|
|
errs := binding.Errors{}
|
|
errs = form.Validate(ctx.Context, errs)
|
|
if len(errs) > 0 {
|
|
errstring := ""
|
|
for _, e := range errs {
|
|
errstring += e.Error() + "\n"
|
|
}
|
|
ctx.ServerError("AuthorizeOAuth: Validate: ", fmt.Errorf("errors occurred during validation: %s", errstring))
|
|
return
|
|
}
|
|
|
|
app, err := models.GetOAuth2ApplicationByClientID(form.ClientID)
|
|
if err != nil {
|
|
if models.IsErrOauthClientIDInvalid(err) {
|
|
handleAuthorizeError(ctx, AuthorizeError{
|
|
ErrorCode: ErrorCodeUnauthorizedClient,
|
|
ErrorDescription: "Client ID not registered",
|
|
State: form.State,
|
|
}, "")
|
|
return
|
|
}
|
|
ctx.ServerError("GetOAuth2ApplicationByClientID", err)
|
|
return
|
|
}
|
|
if err := app.LoadUser(); err != nil {
|
|
ctx.ServerError("LoadUser", err)
|
|
return
|
|
}
|
|
|
|
if !app.ContainsRedirectURI(form.RedirectURI) {
|
|
handleAuthorizeError(ctx, AuthorizeError{
|
|
ErrorCode: ErrorCodeInvalidRequest,
|
|
ErrorDescription: "Unregistered Redirect URI",
|
|
State: form.State,
|
|
}, "")
|
|
return
|
|
}
|
|
|
|
if form.ResponseType != "code" {
|
|
handleAuthorizeError(ctx, AuthorizeError{
|
|
ErrorCode: ErrorCodeUnsupportedResponseType,
|
|
ErrorDescription: "Only code response type is supported.",
|
|
State: form.State,
|
|
}, form.RedirectURI)
|
|
return
|
|
}
|
|
|
|
// pkce support
|
|
switch form.CodeChallengeMethod {
|
|
case "S256":
|
|
case "plain":
|
|
if err := ctx.Session.Set("CodeChallengeMethod", form.CodeChallengeMethod); err != nil {
|
|
handleAuthorizeError(ctx, AuthorizeError{
|
|
ErrorCode: ErrorCodeServerError,
|
|
ErrorDescription: "cannot set code challenge method",
|
|
State: form.State,
|
|
}, form.RedirectURI)
|
|
return
|
|
}
|
|
if err := ctx.Session.Set("CodeChallengeMethod", form.CodeChallenge); err != nil {
|
|
handleAuthorizeError(ctx, AuthorizeError{
|
|
ErrorCode: ErrorCodeServerError,
|
|
ErrorDescription: "cannot set code challenge",
|
|
State: form.State,
|
|
}, form.RedirectURI)
|
|
return
|
|
}
|
|
case "":
|
|
break
|
|
default:
|
|
handleAuthorizeError(ctx, AuthorizeError{
|
|
ErrorCode: ErrorCodeInvalidRequest,
|
|
ErrorDescription: "unsupported code challenge method",
|
|
State: form.State,
|
|
}, form.RedirectURI)
|
|
return
|
|
}
|
|
|
|
grant, err := app.GetGrantByUserID(ctx.User.ID)
|
|
if err != nil {
|
|
handleServerError(ctx, form.State, form.RedirectURI)
|
|
return
|
|
}
|
|
|
|
// Redirect if user already granted access
|
|
if grant != nil {
|
|
code, err := grant.GenerateNewAuthorizationCode(form.RedirectURI, form.CodeChallenge, form.CodeChallengeMethod)
|
|
if err != nil {
|
|
handleServerError(ctx, form.State, form.RedirectURI)
|
|
return
|
|
}
|
|
redirect, err := code.GenerateRedirectURI(form.State)
|
|
if err != nil {
|
|
handleServerError(ctx, form.State, form.RedirectURI)
|
|
return
|
|
}
|
|
ctx.Redirect(redirect.String(), 302)
|
|
return
|
|
}
|
|
|
|
// show authorize page to grant access
|
|
ctx.Data["Application"] = app
|
|
ctx.Data["RedirectURI"] = form.RedirectURI
|
|
ctx.Data["State"] = form.State
|
|
ctx.Data["ApplicationUserLink"] = "<a href=\"" + setting.AppURL + app.User.LowerName + "\">@" + app.User.Name + "</a>"
|
|
ctx.Data["ApplicationRedirectDomainHTML"] = "<strong>" + form.RedirectURI + "</strong>"
|
|
// TODO document SESSION <=> FORM
|
|
err = ctx.Session.Set("client_id", app.ClientID)
|
|
if err != nil {
|
|
handleServerError(ctx, form.State, form.RedirectURI)
|
|
log.Error(err.Error())
|
|
return
|
|
}
|
|
err = ctx.Session.Set("redirect_uri", form.RedirectURI)
|
|
if err != nil {
|
|
handleServerError(ctx, form.State, form.RedirectURI)
|
|
log.Error(err.Error())
|
|
return
|
|
}
|
|
err = ctx.Session.Set("state", form.State)
|
|
if err != nil {
|
|
handleServerError(ctx, form.State, form.RedirectURI)
|
|
log.Error(err.Error())
|
|
return
|
|
}
|
|
ctx.HTML(200, tplGrantAccess)
|
|
}
|
|
|
|
// GrantApplicationOAuth manages the post request submitted when a user grants access to an application
|
|
func GrantApplicationOAuth(ctx *context.Context, form auth.GrantApplicationForm) {
|
|
if ctx.Session.Get("client_id") != form.ClientID || ctx.Session.Get("state") != form.State ||
|
|
ctx.Session.Get("redirect_uri") != form.RedirectURI {
|
|
ctx.Error(400)
|
|
return
|
|
}
|
|
app, err := models.GetOAuth2ApplicationByClientID(form.ClientID)
|
|
if err != nil {
|
|
ctx.ServerError("GetOAuth2ApplicationByClientID", err)
|
|
return
|
|
}
|
|
grant, err := app.CreateGrant(ctx.User.ID)
|
|
if err != nil {
|
|
handleAuthorizeError(ctx, AuthorizeError{
|
|
State: form.State,
|
|
ErrorDescription: "cannot create grant for user",
|
|
ErrorCode: ErrorCodeServerError,
|
|
}, form.RedirectURI)
|
|
return
|
|
}
|
|
|
|
var codeChallenge, codeChallengeMethod string
|
|
codeChallenge, _ = ctx.Session.Get("CodeChallenge").(string)
|
|
codeChallengeMethod, _ = ctx.Session.Get("CodeChallengeMethod").(string)
|
|
|
|
code, err := grant.GenerateNewAuthorizationCode(form.RedirectURI, codeChallenge, codeChallengeMethod)
|
|
if err != nil {
|
|
handleServerError(ctx, form.State, form.RedirectURI)
|
|
return
|
|
}
|
|
redirect, err := code.GenerateRedirectURI(form.State)
|
|
if err != nil {
|
|
handleServerError(ctx, form.State, form.RedirectURI)
|
|
return
|
|
}
|
|
ctx.Redirect(redirect.String(), 302)
|
|
}
|
|
|
|
// AccessTokenOAuth manages all access token requests by the client
|
|
func AccessTokenOAuth(ctx *context.Context, form auth.AccessTokenForm) {
|
|
if form.ClientID == "" {
|
|
authHeader := ctx.Req.Header.Get("Authorization")
|
|
authContent := strings.SplitN(authHeader, " ", 2)
|
|
if len(authContent) == 2 && authContent[0] == "Basic" {
|
|
payload, err := base64.StdEncoding.DecodeString(authContent[1])
|
|
if err != nil {
|
|
handleAccessTokenError(ctx, AccessTokenError{
|
|
ErrorCode: AccessTokenErrorCodeInvalidRequest,
|
|
ErrorDescription: "cannot parse basic auth header",
|
|
})
|
|
return
|
|
}
|
|
pair := strings.SplitN(string(payload), ":", 2)
|
|
if len(pair) != 2 {
|
|
handleAccessTokenError(ctx, AccessTokenError{
|
|
ErrorCode: AccessTokenErrorCodeInvalidRequest,
|
|
ErrorDescription: "cannot parse basic auth header",
|
|
})
|
|
return
|
|
}
|
|
form.ClientID = pair[0]
|
|
form.ClientSecret = pair[1]
|
|
}
|
|
}
|
|
switch form.GrantType {
|
|
case "refresh_token":
|
|
handleRefreshToken(ctx, form)
|
|
return
|
|
case "authorization_code":
|
|
handleAuthorizationCode(ctx, form)
|
|
return
|
|
default:
|
|
handleAccessTokenError(ctx, AccessTokenError{
|
|
ErrorCode: AccessTokenErrorCodeUnsupportedGrantType,
|
|
ErrorDescription: "Only refresh_token or authorization_code grant type is supported",
|
|
})
|
|
}
|
|
}
|
|
|
|
func handleRefreshToken(ctx *context.Context, form auth.AccessTokenForm) {
|
|
token, err := models.ParseOAuth2Token(form.RefreshToken)
|
|
if err != nil {
|
|
handleAccessTokenError(ctx, AccessTokenError{
|
|
ErrorCode: AccessTokenErrorCodeUnauthorizedClient,
|
|
ErrorDescription: "client is not authorized",
|
|
})
|
|
return
|
|
}
|
|
// get grant before increasing counter
|
|
grant, err := models.GetOAuth2GrantByID(token.GrantID)
|
|
if err != nil || grant == nil {
|
|
handleAccessTokenError(ctx, AccessTokenError{
|
|
ErrorCode: AccessTokenErrorCodeInvalidGrant,
|
|
ErrorDescription: "grant does not exist",
|
|
})
|
|
return
|
|
}
|
|
|
|
// check if token got already used
|
|
if setting.OAuth2.InvalidateRefreshTokens && (grant.Counter != token.Counter || token.Counter == 0) {
|
|
handleAccessTokenError(ctx, AccessTokenError{
|
|
ErrorCode: AccessTokenErrorCodeUnauthorizedClient,
|
|
ErrorDescription: "token was already used",
|
|
})
|
|
log.Warn("A client tried to use a refresh token for grant_id = %d was used twice!", grant.ID)
|
|
return
|
|
}
|
|
accessToken, tokenErr := newAccessTokenResponse(grant)
|
|
if tokenErr != nil {
|
|
handleAccessTokenError(ctx, *tokenErr)
|
|
return
|
|
}
|
|
ctx.JSON(200, accessToken)
|
|
}
|
|
|
|
func handleAuthorizationCode(ctx *context.Context, form auth.AccessTokenForm) {
|
|
app, err := models.GetOAuth2ApplicationByClientID(form.ClientID)
|
|
if err != nil {
|
|
handleAccessTokenError(ctx, AccessTokenError{
|
|
ErrorCode: AccessTokenErrorCodeInvalidClient,
|
|
ErrorDescription: fmt.Sprintf("cannot load client with client id: '%s'", form.ClientID),
|
|
})
|
|
return
|
|
}
|
|
if !app.ValidateClientSecret([]byte(form.ClientSecret)) {
|
|
handleAccessTokenError(ctx, AccessTokenError{
|
|
ErrorCode: AccessTokenErrorCodeUnauthorizedClient,
|
|
ErrorDescription: "client is not authorized",
|
|
})
|
|
return
|
|
}
|
|
if form.RedirectURI != "" && !app.ContainsRedirectURI(form.RedirectURI) {
|
|
handleAccessTokenError(ctx, AccessTokenError{
|
|
ErrorCode: AccessTokenErrorCodeUnauthorizedClient,
|
|
ErrorDescription: "client is not authorized",
|
|
})
|
|
return
|
|
}
|
|
authorizationCode, err := models.GetOAuth2AuthorizationByCode(form.Code)
|
|
if err != nil || authorizationCode == nil {
|
|
handleAccessTokenError(ctx, AccessTokenError{
|
|
ErrorCode: AccessTokenErrorCodeUnauthorizedClient,
|
|
ErrorDescription: "client is not authorized",
|
|
})
|
|
return
|
|
}
|
|
// check if code verifier authorizes the client, PKCE support
|
|
if !authorizationCode.ValidateCodeChallenge(form.CodeVerifier) {
|
|
handleAccessTokenError(ctx, AccessTokenError{
|
|
ErrorCode: AccessTokenErrorCodeUnauthorizedClient,
|
|
ErrorDescription: "client is not authorized",
|
|
})
|
|
return
|
|
}
|
|
// check if granted for this application
|
|
if authorizationCode.Grant.ApplicationID != app.ID {
|
|
handleAccessTokenError(ctx, AccessTokenError{
|
|
ErrorCode: AccessTokenErrorCodeInvalidGrant,
|
|
ErrorDescription: "invalid grant",
|
|
})
|
|
return
|
|
}
|
|
// remove token from database to deny duplicate usage
|
|
if err := authorizationCode.Invalidate(); err != nil {
|
|
handleAccessTokenError(ctx, AccessTokenError{
|
|
ErrorCode: AccessTokenErrorCodeInvalidRequest,
|
|
ErrorDescription: "cannot proceed your request",
|
|
})
|
|
}
|
|
resp, tokenErr := newAccessTokenResponse(authorizationCode.Grant)
|
|
if tokenErr != nil {
|
|
handleAccessTokenError(ctx, *tokenErr)
|
|
return
|
|
}
|
|
// send successful response
|
|
ctx.JSON(200, resp)
|
|
}
|
|
|
|
func handleAccessTokenError(ctx *context.Context, acErr AccessTokenError) {
|
|
ctx.JSON(400, acErr)
|
|
}
|
|
|
|
func handleServerError(ctx *context.Context, state string, redirectURI string) {
|
|
handleAuthorizeError(ctx, AuthorizeError{
|
|
ErrorCode: ErrorCodeServerError,
|
|
ErrorDescription: "A server error occurred",
|
|
State: state,
|
|
}, redirectURI)
|
|
}
|
|
|
|
func handleAuthorizeError(ctx *context.Context, authErr AuthorizeError, redirectURI string) {
|
|
if redirectURI == "" {
|
|
log.Warn("Authorization failed: %v", authErr.ErrorDescription)
|
|
ctx.Data["Error"] = authErr
|
|
ctx.HTML(400, tplGrantError)
|
|
return
|
|
}
|
|
redirect, err := url.Parse(redirectURI)
|
|
if err != nil {
|
|
ctx.ServerError("url.Parse", err)
|
|
return
|
|
}
|
|
q := redirect.Query()
|
|
q.Set("error", string(authErr.ErrorCode))
|
|
q.Set("error_description", authErr.ErrorDescription)
|
|
q.Set("state", authErr.State)
|
|
redirect.RawQuery = q.Encode()
|
|
ctx.Redirect(redirect.String(), 302)
|
|
}
|