From dd136858f1ea40ad3c94191d647487fa4f31926c Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel@debian.org>
Date: Fri, 18 Oct 2024 20:33:49 +0200
Subject: Adding upstream version 9.0.0.

Signed-off-by: Daniel Baumann <daniel@debian.org>
---
 routers/web/user/setting/security/webauthn.go | 137 ++++++++++++++++++++++++++
 1 file changed, 137 insertions(+)
 create mode 100644 routers/web/user/setting/security/webauthn.go

(limited to 'routers/web/user/setting/security/webauthn.go')

diff --git a/routers/web/user/setting/security/webauthn.go b/routers/web/user/setting/security/webauthn.go
new file mode 100644
index 0000000..bfbc06c
--- /dev/null
+++ b/routers/web/user/setting/security/webauthn.go
@@ -0,0 +1,137 @@
+// Copyright 2018 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package security
+
+import (
+	"errors"
+	"net/http"
+	"strconv"
+	"time"
+
+	"code.gitea.io/gitea/models/auth"
+	wa "code.gitea.io/gitea/modules/auth/webauthn"
+	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/web"
+	"code.gitea.io/gitea/services/context"
+	"code.gitea.io/gitea/services/forms"
+	"code.gitea.io/gitea/services/mailer"
+
+	"github.com/go-webauthn/webauthn/protocol"
+	"github.com/go-webauthn/webauthn/webauthn"
+)
+
+// WebAuthnRegister initializes the webauthn registration procedure
+func WebAuthnRegister(ctx *context.Context) {
+	form := web.GetForm(ctx).(*forms.WebauthnRegistrationForm)
+	if form.Name == "" {
+		// Set name to the hexadecimal of the current time
+		form.Name = strconv.FormatInt(time.Now().UnixNano(), 16)
+	}
+
+	cred, err := auth.GetWebAuthnCredentialByName(ctx, ctx.Doer.ID, form.Name)
+	if err != nil && !auth.IsErrWebAuthnCredentialNotExist(err) {
+		ctx.ServerError("GetWebAuthnCredentialsByUID", err)
+		return
+	}
+	if cred != nil {
+		ctx.Error(http.StatusConflict, "Name already taken")
+		return
+	}
+
+	_ = ctx.Session.Delete("webauthnRegistration")
+	if err := ctx.Session.Set("webauthnName", form.Name); err != nil {
+		ctx.ServerError("Unable to set session key for webauthnName", err)
+		return
+	}
+
+	credentialOptions, sessionData, err := wa.WebAuthn.BeginRegistration((*wa.User)(ctx.Doer))
+	if err != nil {
+		ctx.ServerError("Unable to BeginRegistration", err)
+		return
+	}
+
+	// Save the session data as marshaled JSON
+	if err = ctx.Session.Set("webauthnRegistration", sessionData); err != nil {
+		ctx.ServerError("Unable to set session", err)
+		return
+	}
+
+	ctx.JSON(http.StatusOK, credentialOptions)
+}
+
+// WebauthnRegisterPost receives the response of the security key
+func WebauthnRegisterPost(ctx *context.Context) {
+	name, ok := ctx.Session.Get("webauthnName").(string)
+	if !ok || name == "" {
+		ctx.ServerError("Get webauthnName", errors.New("no webauthnName"))
+		return
+	}
+
+	// Load the session data
+	sessionData, ok := ctx.Session.Get("webauthnRegistration").(*webauthn.SessionData)
+	if !ok || sessionData == nil {
+		ctx.ServerError("Get registration", errors.New("no registration"))
+		return
+	}
+	defer func() {
+		_ = ctx.Session.Delete("webauthnRegistration")
+	}()
+
+	// Verify that the challenge succeeded
+	cred, err := wa.WebAuthn.FinishRegistration((*wa.User)(ctx.Doer), *sessionData, ctx.Req)
+	if err != nil {
+		if pErr, ok := err.(*protocol.Error); ok {
+			log.Error("Unable to finish registration due to error: %v\nDevInfo: %s", pErr, pErr.DevInfo)
+		}
+		ctx.ServerError("CreateCredential", err)
+		return
+	}
+
+	dbCred, err := auth.GetWebAuthnCredentialByName(ctx, ctx.Doer.ID, name)
+	if err != nil && !auth.IsErrWebAuthnCredentialNotExist(err) {
+		ctx.ServerError("GetWebAuthnCredentialsByUID", err)
+		return
+	}
+	if dbCred != nil {
+		ctx.Error(http.StatusConflict, "Name already taken")
+		return
+	}
+
+	// Create the credential
+	_, err = auth.CreateCredential(ctx, ctx.Doer.ID, name, cred)
+	if err != nil {
+		ctx.ServerError("CreateCredential", err)
+		return
+	}
+	_ = ctx.Session.Delete("webauthnName")
+
+	ctx.JSON(http.StatusCreated, cred)
+}
+
+// WebauthnDelete deletes an security key by id
+func WebauthnDelete(ctx *context.Context) {
+	form := web.GetForm(ctx).(*forms.WebauthnDeleteForm)
+	cred, err := auth.GetWebAuthnCredentialByID(ctx, form.ID)
+	if err != nil || cred.UserID != ctx.Doer.ID {
+		if err != nil && !auth.IsErrWebAuthnCredentialNotExist(err) {
+			log.Error("GetWebAuthnCredentialByID: %v", err)
+		}
+
+		ctx.JSONRedirect(setting.AppSubURL + "/user/settings/security")
+		return
+	}
+
+	if _, err := auth.DeleteCredential(ctx, form.ID, ctx.Doer.ID); err != nil {
+		ctx.ServerError("GetWebAuthnCredentialByID", err)
+		return
+	}
+
+	if err := mailer.SendRemovedSecurityKey(ctx, ctx.Doer, cred.Name); err != nil {
+		ctx.ServerError("SendRemovedSecurityKey", err)
+		return
+	}
+
+	ctx.JSONRedirect(setting.AppSubURL + "/user/settings/security")
+}
-- 
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