--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/curl/lib/vauth/oauth2.c	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,126 @@
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at https://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ * RFC6749 OAuth 2.0 Authorization Framework
+ *
+ ***************************************************************************/
+
+#include "curl_setup.h"
+
+#if !defined(CURL_DISABLE_IMAP) || !defined(CURL_DISABLE_SMTP) || \
+  !defined(CURL_DISABLE_POP3)
+
+#include <curl/curl.h>
+#include "urldata.h"
+
+#include "vauth/vauth.h"
+#include "curl_base64.h"
+#include "warnless.h"
+#include "curl_printf.h"
+
+/* The last #include files should be: */
+#include "curl_memory.h"
+#include "memdebug.h"
+
+/*
+ * Curl_auth_create_oauth_bearer_message()
+ *
+ * This is used to generate an already encoded OAuth 2.0 message ready for
+ * sending to the recipient.
+ *
+ * Parameters:
+ *
+ * data[in]         - The session handle.
+ * user[in]         - The user name.
+ * host[in]         - The host name.
+ * port[in]         - The port(when not Port 80).
+ * bearer[in]       - The bearer token.
+ * outptr[in / out] - The address where a pointer to newly allocated memory
+ *                    holding the result will be stored upon completion.
+ * outlen[out]      - The length of the output message.
+ *
+ * Returns CURLE_OK on success.
+ */
+CURLcode Curl_auth_create_oauth_bearer_message(struct Curl_easy *data,
+                                               const char *user,
+                                               const char *host,
+                                               const long port,
+                                               const char *bearer,
+                                               char **outptr, size_t *outlen)
+{
+  CURLcode result = CURLE_OK;
+  char *oauth = NULL;
+
+  /* Generate the message */
+  if(port == 0 || port == 80)
+    oauth = aprintf("n,a=%s,\1host=%s\1auth=Bearer %s\1\1", user, host,
+                    bearer);
+  else
+    oauth = aprintf("n,a=%s,\1host=%s\1port=%ld\1auth=Bearer %s\1\1", user,
+                    host, port, bearer);
+  if(!oauth)
+    return CURLE_OUT_OF_MEMORY;
+
+  /* Base64 encode the reply */
+  result = Curl_base64_encode(data, oauth, strlen(oauth), outptr, outlen);
+
+  free(oauth);
+
+  return result;
+}
+
+/*
+ * Curl_auth_create_xoauth_bearer_message()
+ *
+ * This is used to generate an already encoded XOAuth 2.0 message ready for
+ * sending to the recipient.
+ *
+ * Parameters:
+ *
+ * data[in]         - The session handle.
+ * user[in]         - The user name.
+ * bearer[in]       - The bearer token.
+ * outptr[in / out] - The address where a pointer to newly allocated memory
+ *                    holding the result will be stored upon completion.
+ * outlen[out]      - The length of the output message.
+ *
+ * Returns CURLE_OK on success.
+ */
+CURLcode Curl_auth_create_xoauth_bearer_message(struct Curl_easy *data,
+                                               const char *user,
+                                               const char *bearer,
+                                               char **outptr, size_t *outlen)
+{
+  CURLcode result = CURLE_OK;
+
+  /* Generate the message */
+  char *xoauth = aprintf("user=%s\1auth=Bearer %s\1\1", user, bearer);
+  if(!xoauth)
+    return CURLE_OUT_OF_MEMORY;
+
+  /* Base64 encode the reply */
+  result = Curl_base64_encode(data, xoauth, strlen(xoauth), outptr, outlen);
+
+  free(xoauth);
+
+  return result;
+}
+#endif /* disabled, no users */
+