116 lines
4.2 KiB
Go
116 lines
4.2 KiB
Go
/*
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GoToSocial
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Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package auth
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import (
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"errors"
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"net/http"
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"github.com/gin-contrib/sessions"
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"github.com/gin-gonic/gin"
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"github.com/superseriousbusiness/gotosocial/internal/db/gtsmodel"
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"golang.org/x/crypto/bcrypt"
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)
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type login struct {
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Email string `form:"username"`
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Password string `form:"password"`
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}
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// signInGETHandler should be served at https://example.org/auth/sign_in.
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// The idea is to present a sign in page to the user, where they can enter their username and password.
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// The form will then POST to the sign in page, which will be handled by SignInPOSTHandler
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func (m *authModule) signInGETHandler(c *gin.Context) {
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m.log.WithField("func", "SignInGETHandler").Trace("serving sign in html")
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c.HTML(http.StatusOK, "sign-in.tmpl", gin.H{})
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}
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// signInPOSTHandler should be served at https://example.org/auth/sign_in.
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// The idea is to present a sign in page to the user, where they can enter their username and password.
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// The handler will then redirect to the auth handler served at /auth
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func (m *authModule) signInPOSTHandler(c *gin.Context) {
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l := m.log.WithField("func", "SignInPOSTHandler")
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s := sessions.Default(c)
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form := &login{}
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if err := c.ShouldBind(form); err != nil {
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c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
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return
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}
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l.Tracef("parsed form: %+v", form)
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userid, err := m.validatePassword(form.Email, form.Password)
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if err != nil {
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c.String(http.StatusForbidden, err.Error())
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return
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}
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s.Set("userid", userid)
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if err := s.Save(); err != nil {
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c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
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return
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}
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l.Trace("redirecting to auth page")
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c.Redirect(http.StatusFound, oauthAuthorizePath)
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}
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// validatePassword takes an email address and a password.
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// The goal is to authenticate the password against the one for that email
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// address stored in the database. If OK, we return the userid (a uuid) for that user,
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// so that it can be used in further Oauth flows to generate a token/retreieve an oauth client from the db.
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func (m *authModule) validatePassword(email string, password string) (userid string, err error) {
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l := m.log.WithField("func", "ValidatePassword")
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// make sure an email/password was provided and bail if not
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if email == "" || password == "" {
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l.Debug("email or password was not provided")
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return incorrectPassword()
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}
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// first we select the user from the database based on email address, bail if no user found for that email
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gtsUser := >smodel.User{}
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if err := m.db.GetWhere("email", email, gtsUser); err != nil {
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l.Debugf("user %s was not retrievable from db during oauth authorization attempt: %s", email, err)
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return incorrectPassword()
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}
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// make sure a password is actually set and bail if not
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if gtsUser.EncryptedPassword == "" {
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l.Warnf("encrypted password for user %s was empty for some reason", gtsUser.Email)
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return incorrectPassword()
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}
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// compare the provided password with the encrypted one from the db, bail if they don't match
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if err := bcrypt.CompareHashAndPassword([]byte(gtsUser.EncryptedPassword), []byte(password)); err != nil {
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l.Debugf("password hash didn't match for user %s during login attempt: %s", gtsUser.Email, err)
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return incorrectPassword()
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}
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// If we've made it this far the email/password is correct, so we can just return the id of the user.
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userid = gtsUser.ID
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l.Tracef("returning (%s, %s)", userid, err)
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return
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}
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// incorrectPassword is just a little helper function to use in the ValidatePassword function
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func incorrectPassword() (string, error) {
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return "", errors.New("password/email combination was incorrect")
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}
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