--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/curl/lib/vtls/vtls.h	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,277 @@
+#ifndef HEADER_CURL_VTLS_H
+#define HEADER_CURL_VTLS_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"
+
+struct connectdata;
+struct ssl_connect_data;
+
+#define SSLSUPP_CA_PATH      (1<<0) /* supports CAPATH */
+#define SSLSUPP_CERTINFO     (1<<1) /* supports CURLOPT_CERTINFO */
+#define SSLSUPP_PINNEDPUBKEY (1<<2) /* supports CURLOPT_PINNEDPUBLICKEY */
+#define SSLSUPP_SSL_CTX      (1<<3) /* supports CURLOPT_SSL_CTX */
+#define SSLSUPP_HTTPS_PROXY  (1<<4) /* supports access via HTTPS proxies */
+#define SSLSUPP_TLS13_CIPHERSUITES (1<<5) /* supports TLS 1.3 ciphersuites */
+
+struct Curl_ssl {
+  /*
+   * This *must* be the first entry to allow returning the list of available
+   * backends in curl_global_sslset().
+   */
+  curl_ssl_backend info;
+  unsigned int supports; /* bitfield, see above */
+  size_t sizeof_ssl_backend_data;
+
+  int (*init)(void);
+  void (*cleanup)(void);
+
+  size_t (*version)(char *buffer, size_t size);
+  int (*check_cxn)(struct connectdata *cxn);
+  int (*shut_down)(struct connectdata *conn, int sockindex);
+  bool (*data_pending)(const struct connectdata *conn,
+                       int connindex);
+
+  /* return 0 if a find random is filled in */
+  CURLcode (*random)(struct Curl_easy *data, unsigned char *entropy,
+                     size_t length);
+  bool (*cert_status_request)(void);
+
+  CURLcode (*connect_blocking)(struct connectdata *conn, int sockindex);
+  CURLcode (*connect_nonblocking)(struct connectdata *conn, int sockindex,
+                                  bool *done);
+  void *(*get_internals)(struct ssl_connect_data *connssl, CURLINFO info);
+  void (*close_one)(struct connectdata *conn, int sockindex);
+  void (*close_all)(struct Curl_easy *data);
+  void (*session_free)(void *ptr);
+
+  CURLcode (*set_engine)(struct Curl_easy *data, const char *engine);
+  CURLcode (*set_engine_default)(struct Curl_easy *data);
+  struct curl_slist *(*engines_list)(struct Curl_easy *data);
+
+  bool (*false_start)(void);
+
+  CURLcode (*md5sum)(unsigned char *input, size_t inputlen,
+                     unsigned char *md5sum, size_t md5sumlen);
+  CURLcode (*sha256sum)(const unsigned char *input, size_t inputlen,
+                    unsigned char *sha256sum, size_t sha256sumlen);
+};
+
+#ifdef USE_SSL
+extern const struct Curl_ssl *Curl_ssl;
+#endif
+
+int Curl_none_init(void);
+void Curl_none_cleanup(void);
+int Curl_none_shutdown(struct connectdata *conn, int sockindex);
+int Curl_none_check_cxn(struct connectdata *conn);
+CURLcode Curl_none_random(struct Curl_easy *data, unsigned char *entropy,
+                          size_t length);
+void Curl_none_close_all(struct Curl_easy *data);
+void Curl_none_session_free(void *ptr);
+bool Curl_none_data_pending(const struct connectdata *conn, int connindex);
+bool Curl_none_cert_status_request(void);
+CURLcode Curl_none_set_engine(struct Curl_easy *data, const char *engine);
+CURLcode Curl_none_set_engine_default(struct Curl_easy *data);
+struct curl_slist *Curl_none_engines_list(struct Curl_easy *data);
+bool Curl_none_false_start(void);
+bool Curl_ssl_tls13_ciphersuites(void);
+CURLcode Curl_none_md5sum(unsigned char *input, size_t inputlen,
+                          unsigned char *md5sum, size_t md5len);
+
+#include "openssl.h"        /* OpenSSL versions */
+#include "gtls.h"           /* GnuTLS versions */
+#include "nssg.h"           /* NSS versions */
+#include "gskit.h"          /* Global Secure ToolKit versions */
+#include "polarssl.h"       /* PolarSSL versions */
+#include "wolfssl.h"        /* wolfSSL versions */
+#include "schannel.h"       /* Schannel SSPI version */
+#include "sectransp.h"      /* SecureTransport (Darwin) version */
+#include "mbedtls.h"        /* mbedTLS versions */
+#include "mesalink.h"       /* MesaLink versions */
+
+#ifndef MAX_PINNED_PUBKEY_SIZE
+#define MAX_PINNED_PUBKEY_SIZE 1048576 /* 1MB */
+#endif
+
+#ifndef MD5_DIGEST_LENGTH
+#ifndef LIBWOLFSSL_VERSION_HEX /* because WolfSSL borks this */
+#define MD5_DIGEST_LENGTH 16 /* fixed size */
+#endif
+#endif
+
+#ifndef CURL_SHA256_DIGEST_LENGTH
+#define CURL_SHA256_DIGEST_LENGTH 32 /* fixed size */
+#endif
+
+/* see https://tools.ietf.org/html/draft-ietf-tls-applayerprotoneg-04 */
+#define ALPN_HTTP_1_1_LENGTH 8
+#define ALPN_HTTP_1_1 "http/1.1"
+
+/* set of helper macros for the backends to access the correct fields. For the
+   proxy or for the remote host - to properly support HTTPS proxy */
+
+#define SSL_IS_PROXY() (CURLPROXY_HTTPS == conn->http_proxy.proxytype && \
+  ssl_connection_complete != conn->proxy_ssl[conn->sock[SECONDARYSOCKET] == \
+  CURL_SOCKET_BAD ? FIRSTSOCKET : SECONDARYSOCKET].state)
+#define SSL_SET_OPTION(var) (SSL_IS_PROXY() ? data->set.proxy_ssl.var : \
+                             data->set.ssl.var)
+#define SSL_CONN_CONFIG(var) (SSL_IS_PROXY() ?          \
+  conn->proxy_ssl_config.var : conn->ssl_config.var)
+
+bool Curl_ssl_config_matches(struct ssl_primary_config* data,
+                             struct ssl_primary_config* needle);
+bool Curl_clone_primary_ssl_config(struct ssl_primary_config *source,
+                                   struct ssl_primary_config *dest);
+void Curl_free_primary_ssl_config(struct ssl_primary_config* sslc);
+int Curl_ssl_getsock(struct connectdata *conn, curl_socket_t *socks);
+
+int Curl_ssl_backend(void);
+
+#ifdef USE_SSL
+int Curl_ssl_init(void);
+void Curl_ssl_cleanup(void);
+CURLcode Curl_ssl_connect(struct connectdata *conn, int sockindex);
+CURLcode Curl_ssl_connect_nonblocking(struct connectdata *conn,
+                                      int sockindex,
+                                      bool *done);
+/* tell the SSL stuff to close down all open information regarding
+   connections (and thus session ID caching etc) */
+void Curl_ssl_close_all(struct Curl_easy *data);
+void Curl_ssl_close(struct connectdata *conn, int sockindex);
+CURLcode Curl_ssl_shutdown(struct connectdata *conn, int sockindex);
+CURLcode Curl_ssl_set_engine(struct Curl_easy *data, const char *engine);
+/* Sets engine as default for all SSL operations */
+CURLcode Curl_ssl_set_engine_default(struct Curl_easy *data);
+struct curl_slist *Curl_ssl_engines_list(struct Curl_easy *data);
+
+/* init the SSL session ID cache */
+CURLcode Curl_ssl_initsessions(struct Curl_easy *, size_t);
+size_t Curl_ssl_version(char *buffer, size_t size);
+bool Curl_ssl_data_pending(const struct connectdata *conn,
+                           int connindex);
+int Curl_ssl_check_cxn(struct connectdata *conn);
+
+/* Certificate information list handling. */
+
+void Curl_ssl_free_certinfo(struct Curl_easy *data);
+CURLcode Curl_ssl_init_certinfo(struct Curl_easy *data, int num);
+CURLcode Curl_ssl_push_certinfo_len(struct Curl_easy *data, int certnum,
+                                    const char *label, const char *value,
+                                    size_t valuelen);
+CURLcode Curl_ssl_push_certinfo(struct Curl_easy *data, int certnum,
+                                const char *label, const char *value);
+
+/* Functions to be used by SSL library adaptation functions */
+
+/* Lock session cache mutex.
+ * Call this before calling other Curl_ssl_*session* functions
+ * Caller should unlock this mutex as soon as possible, as it may block
+ * other SSL connection from making progress.
+ * The purpose of explicitly locking SSL session cache data is to allow
+ * individual SSL engines to manage session lifetime in their specific way.
+ */
+void Curl_ssl_sessionid_lock(struct connectdata *conn);
+
+/* Unlock session cache mutex */
+void Curl_ssl_sessionid_unlock(struct connectdata *conn);
+
+/* extract a session ID
+ * Sessionid mutex must be locked (see Curl_ssl_sessionid_lock).
+ * Caller must make sure that the ownership of returned sessionid object
+ * is properly taken (e.g. its refcount is incremented
+ * under sessionid mutex).
+ */
+bool Curl_ssl_getsessionid(struct connectdata *conn,
+                           void **ssl_sessionid,
+                           size_t *idsize, /* set 0 if unknown */
+                           int sockindex);
+/* add a new session ID
+ * Sessionid mutex must be locked (see Curl_ssl_sessionid_lock).
+ * Caller must ensure that it has properly shared ownership of this sessionid
+ * object with cache (e.g. incrementing refcount on success)
+ */
+CURLcode Curl_ssl_addsessionid(struct connectdata *conn,
+                               void *ssl_sessionid,
+                               size_t idsize,
+                               int sockindex);
+/* Kill a single session ID entry in the cache
+ * Sessionid mutex must be locked (see Curl_ssl_sessionid_lock).
+ * This will call engine-specific curlssl_session_free function, which must
+ * take sessionid object ownership from sessionid cache
+ * (e.g. decrement refcount).
+ */
+void Curl_ssl_kill_session(struct curl_ssl_session *session);
+/* delete a session from the cache
+ * Sessionid mutex must be locked (see Curl_ssl_sessionid_lock).
+ * This will call engine-specific curlssl_session_free function, which must
+ * take sessionid object ownership from sessionid cache
+ * (e.g. decrement refcount).
+ */
+void Curl_ssl_delsessionid(struct connectdata *conn, void *ssl_sessionid);
+
+/* get N random bytes into the buffer */
+CURLcode Curl_ssl_random(struct Curl_easy *data, unsigned char *buffer,
+                         size_t length);
+CURLcode Curl_ssl_md5sum(unsigned char *tmp, /* input */
+                         size_t tmplen,
+                         unsigned char *md5sum, /* output */
+                         size_t md5len);
+/* Check pinned public key. */
+CURLcode Curl_pin_peer_pubkey(struct Curl_easy *data,
+                              const char *pinnedpubkey,
+                              const unsigned char *pubkey, size_t pubkeylen);
+
+bool Curl_ssl_cert_status_request(void);
+
+bool Curl_ssl_false_start(void);
+
+#define SSL_SHUTDOWN_TIMEOUT 10000 /* ms */
+
+#else /* if not USE_SSL */
+
+/* When SSL support is not present, just define away these function calls */
+#define Curl_ssl_init() 1
+#define Curl_ssl_cleanup() Curl_nop_stmt
+#define Curl_ssl_connect(x,y) CURLE_NOT_BUILT_IN
+#define Curl_ssl_close_all(x) Curl_nop_stmt
+#define Curl_ssl_close(x,y) Curl_nop_stmt
+#define Curl_ssl_shutdown(x,y) CURLE_NOT_BUILT_IN
+#define Curl_ssl_set_engine(x,y) CURLE_NOT_BUILT_IN
+#define Curl_ssl_set_engine_default(x) CURLE_NOT_BUILT_IN
+#define Curl_ssl_engines_list(x) NULL
+#define Curl_ssl_send(a,b,c,d,e) -1
+#define Curl_ssl_recv(a,b,c,d,e) -1
+#define Curl_ssl_initsessions(x,y) CURLE_OK
+#define Curl_ssl_version(x,y) 0
+#define Curl_ssl_data_pending(x,y) 0
+#define Curl_ssl_check_cxn(x) 0
+#define Curl_ssl_free_certinfo(x) Curl_nop_stmt
+#define Curl_ssl_connect_nonblocking(x,y,z) CURLE_NOT_BUILT_IN
+#define Curl_ssl_kill_session(x) Curl_nop_stmt
+#define Curl_ssl_random(x,y,z) ((void)x, CURLE_NOT_BUILT_IN)
+#define Curl_ssl_cert_status_request() FALSE
+#define Curl_ssl_false_start() FALSE
+#define Curl_ssl_tls13_ciphersuites() FALSE
+#endif
+
+#endif /* HEADER_CURL_VTLS_H */