--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/curl/lib/ssh.h	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,254 @@
+#ifndef HEADER_CURL_SSH_H
+#define HEADER_CURL_SSH_H
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  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.
+ *
+ ***************************************************************************/
+
+#include "curl_setup.h"
+
+#if defined(HAVE_LIBSSH2_H)
+#include <libssh2.h>
+#include <libssh2_sftp.h>
+#elif defined(HAVE_LIBSSH_LIBSSH_H)
+#include <libssh/libssh.h>
+#include <libssh/sftp.h>
+#endif /* HAVE_LIBSSH2_H */
+
+/****************************************************************************
+ * SSH unique setup
+ ***************************************************************************/
+typedef enum {
+  SSH_NO_STATE = -1,  /* Used for "nextState" so say there is none */
+  SSH_STOP = 0,       /* do nothing state, stops the state machine */
+
+  SSH_INIT,           /* First state in SSH-CONNECT */
+  SSH_S_STARTUP,      /* Session startup */
+  SSH_HOSTKEY,        /* verify hostkey */
+  SSH_AUTHLIST,
+  SSH_AUTH_PKEY_INIT,
+  SSH_AUTH_PKEY,
+  SSH_AUTH_PASS_INIT,
+  SSH_AUTH_PASS,
+  SSH_AUTH_AGENT_INIT, /* initialize then wait for connection to agent */
+  SSH_AUTH_AGENT_LIST, /* ask for list then wait for entire list to come */
+  SSH_AUTH_AGENT,      /* attempt one key at a time */
+  SSH_AUTH_HOST_INIT,
+  SSH_AUTH_HOST,
+  SSH_AUTH_KEY_INIT,
+  SSH_AUTH_KEY,
+  SSH_AUTH_GSSAPI,
+  SSH_AUTH_DONE,
+  SSH_SFTP_INIT,
+  SSH_SFTP_REALPATH,   /* Last state in SSH-CONNECT */
+
+  SSH_SFTP_QUOTE_INIT, /* First state in SFTP-DO */
+  SSH_SFTP_POSTQUOTE_INIT, /* (Possibly) First state in SFTP-DONE */
+  SSH_SFTP_QUOTE,
+  SSH_SFTP_NEXT_QUOTE,
+  SSH_SFTP_QUOTE_STAT,
+  SSH_SFTP_QUOTE_SETSTAT,
+  SSH_SFTP_QUOTE_SYMLINK,
+  SSH_SFTP_QUOTE_MKDIR,
+  SSH_SFTP_QUOTE_RENAME,
+  SSH_SFTP_QUOTE_RMDIR,
+  SSH_SFTP_QUOTE_UNLINK,
+  SSH_SFTP_QUOTE_STATVFS,
+  SSH_SFTP_GETINFO,
+  SSH_SFTP_FILETIME,
+  SSH_SFTP_TRANS_INIT,
+  SSH_SFTP_UPLOAD_INIT,
+  SSH_SFTP_CREATE_DIRS_INIT,
+  SSH_SFTP_CREATE_DIRS,
+  SSH_SFTP_CREATE_DIRS_MKDIR,
+  SSH_SFTP_READDIR_INIT,
+  SSH_SFTP_READDIR,
+  SSH_SFTP_READDIR_LINK,
+  SSH_SFTP_READDIR_BOTTOM,
+  SSH_SFTP_READDIR_DONE,
+  SSH_SFTP_DOWNLOAD_INIT,
+  SSH_SFTP_DOWNLOAD_STAT, /* Last state in SFTP-DO */
+  SSH_SFTP_CLOSE,    /* Last state in SFTP-DONE */
+  SSH_SFTP_SHUTDOWN, /* First state in SFTP-DISCONNECT */
+  SSH_SCP_TRANS_INIT, /* First state in SCP-DO */
+  SSH_SCP_UPLOAD_INIT,
+  SSH_SCP_DOWNLOAD_INIT,
+  SSH_SCP_DOWNLOAD,
+  SSH_SCP_DONE,
+  SSH_SCP_SEND_EOF,
+  SSH_SCP_WAIT_EOF,
+  SSH_SCP_WAIT_CLOSE,
+  SSH_SCP_CHANNEL_FREE,   /* Last state in SCP-DONE */
+  SSH_SESSION_DISCONNECT, /* First state in SCP-DISCONNECT */
+  SSH_SESSION_FREE,       /* Last state in SCP/SFTP-DISCONNECT */
+  SSH_QUIT,
+  SSH_LAST  /* never used */
+} sshstate;
+
+/* this struct is used in the HandleData struct which is part of the
+   Curl_easy, which means this is used on a per-easy handle basis.
+   Everything that is strictly related to a connection is banned from this
+   struct. */
+struct SSHPROTO {
+  char *path;                  /* the path we operate on */
+};
+
+/* ssh_conn is used for struct connection-oriented data in the connectdata
+   struct */
+struct ssh_conn {
+  const char *authlist;       /* List of auth. methods, managed by libssh2 */
+
+  /* common */
+  const char *passphrase;     /* pass-phrase to use */
+  char *rsa_pub;              /* path name */
+  char *rsa;                  /* path name */
+  bool authed;                /* the connection has been authenticated fine */
+  sshstate state;             /* always use ssh.c:state() to change state! */
+  sshstate nextstate;         /* the state to goto after stopping */
+  CURLcode actualcode;        /* the actual error code */
+  struct curl_slist *quote_item; /* for the quote option */
+  char *quote_path1;          /* two generic pointers for the QUOTE stuff */
+  char *quote_path2;
+
+  bool acceptfail;            /* used by the SFTP_QUOTE (continue if
+                                 quote command fails) */
+  char *homedir;              /* when doing SFTP we figure out home dir in the
+                                 connect phase */
+  size_t readdir_len, readdir_totalLen, readdir_currLen;
+  char *readdir_line;
+  char *readdir_linkPath;
+  /* end of READDIR stuff */
+
+  int secondCreateDirs;         /* counter use by the code to see if the
+                                   second attempt has been made to change
+                                   to/create a directory */
+  char *slash_pos;              /* used by the SFTP_CREATE_DIRS state */
+
+  int orig_waitfor;             /* default READ/WRITE bits wait for */
+
+#if defined(USE_LIBSSH)
+/* our variables */
+  unsigned kbd_state; /* 0 or 1 */
+  ssh_key privkey;
+  ssh_key pubkey;
+  int auth_methods;
+  ssh_session ssh_session;
+  ssh_scp scp_session;
+  sftp_session sftp_session;
+  sftp_file sftp_file;
+  sftp_dir sftp_dir;
+
+  unsigned sftp_recv_state; /* 0 or 1 */
+  int sftp_file_index; /* for async read */
+  sftp_attributes readdir_attrs; /* used by the SFTP readdir actions */
+  sftp_attributes readdir_link_attrs; /* used by the SFTP readdir actions */
+  sftp_attributes quote_attrs; /* used by the SFTP_QUOTE state */
+
+  const char *readdir_filename; /* points within readdir_attrs */
+  const char *readdir_longentry;
+  char *readdir_tmp;
+#elif defined(USE_LIBSSH2)
+  char *readdir_filename;
+  char *readdir_longentry;
+
+  LIBSSH2_SFTP_ATTRIBUTES quote_attrs; /* used by the SFTP_QUOTE state */
+
+  /* Here's a set of struct members used by the SFTP_READDIR state */
+  LIBSSH2_SFTP_ATTRIBUTES readdir_attrs;
+  LIBSSH2_SESSION *ssh_session; /* Secure Shell session */
+  LIBSSH2_CHANNEL *ssh_channel; /* Secure Shell channel handle */
+  LIBSSH2_SFTP *sftp_session;   /* SFTP handle */
+  LIBSSH2_SFTP_HANDLE *sftp_handle;
+
+#ifdef HAVE_LIBSSH2_AGENT_API
+  LIBSSH2_AGENT *ssh_agent;     /* proxy to ssh-agent/pageant */
+  struct libssh2_agent_publickey *sshagent_identity,
+                                 *sshagent_prev_identity;
+#endif
+
+  /* note that HAVE_LIBSSH2_KNOWNHOST_API is a define set in the libssh2.h
+     header */
+#ifdef HAVE_LIBSSH2_KNOWNHOST_API
+  LIBSSH2_KNOWNHOSTS *kh;
+#endif
+#endif /* USE_LIBSSH */
+};
+
+#if defined(USE_LIBSSH)
+
+#define CURL_LIBSSH_VERSION ssh_version(0)
+
+extern const struct Curl_handler Curl_handler_scp;
+extern const struct Curl_handler Curl_handler_sftp;
+
+#elif defined(USE_LIBSSH2)
+
+/* Feature detection based on version numbers to better work with
+   non-configure platforms */
+
+#if !defined(LIBSSH2_VERSION_NUM) || (LIBSSH2_VERSION_NUM < 0x001000)
+#  error "SCP/SFTP protocols require libssh2 0.16 or later"
+#endif
+
+#if LIBSSH2_VERSION_NUM >= 0x010000
+#define HAVE_LIBSSH2_SFTP_SEEK64 1
+#endif
+
+#if LIBSSH2_VERSION_NUM >= 0x010100
+#define HAVE_LIBSSH2_VERSION 1
+#endif
+
+#if LIBSSH2_VERSION_NUM >= 0x010205
+#define HAVE_LIBSSH2_INIT 1
+#define HAVE_LIBSSH2_EXIT 1
+#endif
+
+#if LIBSSH2_VERSION_NUM >= 0x010206
+#define HAVE_LIBSSH2_KNOWNHOST_CHECKP 1
+#define HAVE_LIBSSH2_SCP_SEND64 1
+#endif
+
+#if LIBSSH2_VERSION_NUM >= 0x010208
+#define HAVE_LIBSSH2_SESSION_HANDSHAKE 1
+#endif
+
+#ifdef HAVE_LIBSSH2_VERSION
+/* get it run-time if possible */
+#define CURL_LIBSSH2_VERSION libssh2_version(0)
+#else
+/* use build-time if run-time not possible */
+#define CURL_LIBSSH2_VERSION LIBSSH2_VERSION
+#endif
+
+extern const struct Curl_handler Curl_handler_scp;
+extern const struct Curl_handler Curl_handler_sftp;
+#endif /* USE_LIBSSH2 */
+
+#ifdef USE_SSH
+/* generic SSH backend functions */
+CURLcode Curl_ssh_init(void);
+void Curl_ssh_cleanup(void);
+size_t Curl_ssh_version(char *buffer, size_t buflen);
+#else
+/* for non-SSH builds */
+#define Curl_ssh_cleanup()
+#endif
+
+#endif /* HEADER_CURL_SSH_H */