mesalink: remove supportbagder/rm-mesalink

Mesalink has ceased development. We can no longer encourage use of it.
It seems to be continued under the name TabbySSL, but no attempts have
(yet) been to make curl support it.

Fixes #8188
Closes #8191

1 files changed, 0 insertions, 679 deletions

diff --git a/lib/vtls/mesalink.c b/lib/vtls/mesalink.c
deleted file mode 100644
index 35a916586..000000000
--- a/lib/vtls/mesalink.c
+++ /dev/null
@@ -1,679 +0,0 @@
-/***************************************************************************
- *                                  _   _ ____  _
- *  Project                     ___| | | |  _ \| |
- *                             / __| | | | |_) | |
- *                            | (__| |_| |  _ <| |___
- *                             \___|\___/|_| \_\_____|
- *
- * Copyright (C) 2017 - 2018, Yiming Jing, <jingyiming@baidu.com>
- * Copyright (C) 1998 - 2021, 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.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.
- *
- ***************************************************************************/
-
-/*
- * Source file for all MesaLink-specific code for the TLS/SSL layer. No code
- * but vtls.c should ever call or use these functions.
- *
- */
-
-/*
- * Based upon the CyaSSL implementation in cyassl.c and cyassl.h:
- *   Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
- *
- * Thanks for code and inspiration!
- */
-
-#include "curl_setup.h"
-
-#ifdef USE_MESALINK
-
-#include <mesalink/options.h>
-#include <mesalink/version.h>
-
-#include "urldata.h"
-#include "sendf.h"
-#include "inet_pton.h"
-#include "vtls.h"
-#include "parsedate.h"
-#include "connect.h" /* for the connect timeout */
-#include "select.h"
-#include "strcase.h"
-#include "x509asn1.h"
-#include "curl_printf.h"
-
-#include "mesalink.h"
-#include <mesalink/openssl/ssl.h>
-#include <mesalink/openssl/err.h>
-
-/* The last #include files should be: */
-#include "curl_memory.h"
-#include "memdebug.h"
-
-#define MESALINK_MAX_ERROR_SZ 80
-
-struct ssl_backend_data
-{
-  SSL_CTX *ctx;
-  SSL *handle;
-};
-
-static Curl_recv mesalink_recv;
-static Curl_send mesalink_send;
-
-static int do_file_type(const char *type)
-{
-  if(!type || !type[0])
-    return SSL_FILETYPE_PEM;
-  if(strcasecompare(type, "PEM"))
-    return SSL_FILETYPE_PEM;
-  if(strcasecompare(type, "DER"))
-    return SSL_FILETYPE_ASN1;
-  return -1;
-}
-
-/*
- * This function loads all the client/CA certificates and CRLs. Setup the TLS
- * layer and do all necessary magic.
- */
-static CURLcode
-mesalink_connect_step1(struct Curl_easy *data,
-                       struct connectdata *conn, int sockindex)
-{
-  char *ciphers;
-  struct ssl_connect_data *connssl = &conn->ssl[sockindex];
-  struct in_addr addr4;
-#ifdef ENABLE_IPV6
-  struct in6_addr addr6;
-#endif
-  const char * const hostname = SSL_HOST_NAME();
-  size_t hostname_len = strlen(hostname);
-  SSL_METHOD *req_method = NULL;
-  curl_socket_t sockfd = conn->sock[sockindex];
-  struct ssl_backend_data *backend = connssl->backend;
-
-  if(connssl->state == ssl_connection_complete)
-    return CURLE_OK;
-
-  if(SSL_CONN_CONFIG(version_max) != CURL_SSLVERSION_MAX_NONE) {
-    failf(data, "MesaLink does not support to set maximum SSL/TLS version");
-    return CURLE_SSL_CONNECT_ERROR;
-  }
-
-  switch(SSL_CONN_CONFIG(version)) {
-  case CURL_SSLVERSION_SSLv3:
-  case CURL_SSLVERSION_TLSv1:
-  case CURL_SSLVERSION_TLSv1_0:
-  case CURL_SSLVERSION_TLSv1_1:
-    failf(data, "MesaLink does not support SSL 3.0, TLS 1.0, or TLS 1.1");
-    return CURLE_NOT_BUILT_IN;
-  case CURL_SSLVERSION_DEFAULT:
-  case CURL_SSLVERSION_TLSv1_2:
-    req_method = TLSv1_2_client_method();
-    break;
-  case CURL_SSLVERSION_TLSv1_3:
-    req_method = TLSv1_3_client_method();
-    break;
-  case CURL_SSLVERSION_SSLv2:
-    failf(data, "MesaLink does not support SSLv2");
-    return CURLE_SSL_CONNECT_ERROR;
-  default:
-    failf(data, "Unrecognized parameter passed via CURLOPT_SSLVERSION");
-    return CURLE_SSL_CONNECT_ERROR;
-  }
-
-  if(!req_method) {
-    failf(data, "SSL: couldn't create a method!");
-    return CURLE_OUT_OF_MEMORY;
-  }
-
-  if(backend->ctx)
-    SSL_CTX_free(backend->ctx);
-  backend->ctx = SSL_CTX_new(req_method);
-
-  if(!backend->ctx) {
-    failf(data, "SSL: couldn't create a context!");
-    return CURLE_OUT_OF_MEMORY;
-  }
-
-  SSL_CTX_set_verify(
-    backend->ctx, SSL_CONN_CONFIG(verifypeer) ?
-      SSL_VERIFY_PEER : SSL_VERIFY_NONE, NULL);
-
-  if(SSL_CONN_CONFIG(CAfile) || SSL_CONN_CONFIG(CApath)) {
-    if(!SSL_CTX_load_verify_locations(backend->ctx, SSL_CONN_CONFIG(CAfile),
-                                      SSL_CONN_CONFIG(CApath))) {
-      if(SSL_CONN_CONFIG(verifypeer)) {
-        failf(data,
-              "error setting certificate verify locations: "
-              " CAfile: %s CApath: %s",
-              SSL_CONN_CONFIG(CAfile) ?
-              SSL_CONN_CONFIG(CAfile) : "none",
-              SSL_CONN_CONFIG(CApath) ?
-              SSL_CONN_CONFIG(CApath) : "none");
-        return CURLE_SSL_CACERT_BADFILE;
-      }
-      infof(data,
-          "error setting certificate verify locations,"
-          " continuing anyway:");
-    }
-    else {
-      infof(data, "successfully set certificate verify locations:");
-    }
-    infof(data, " CAfile: %s",
-          SSL_CONN_CONFIG(CAfile) ? SSL_CONN_CONFIG(CAfile): "none");
-    infof(data, " CApath: %s",
-          SSL_CONN_CONFIG(CApath) ? SSL_CONN_CONFIG(CApath): "none");
-  }
-
-  if(SSL_SET_OPTION(primary.clientcert) && SSL_SET_OPTION(key)) {
-    int file_type = do_file_type(SSL_SET_OPTION(cert_type));
-
-    if(SSL_CTX_use_certificate_chain_file(backend->ctx,
-                                          SSL_SET_OPTION(primary.clientcert),
-                                          file_type) != 1) {
-      failf(data, "unable to use client certificate (no key or wrong pass"
-            " phrase?)");
-      return CURLE_SSL_CONNECT_ERROR;
-    }
-
-    file_type = do_file_type(SSL_SET_OPTION(key_type));
-    if(SSL_CTX_use_PrivateKey_file(backend->ctx, SSL_SET_OPTION(key),
-                                   file_type) != 1) {
-      failf(data, "unable to set private key");
-      return CURLE_SSL_CONNECT_ERROR;
-    }
-    infof(data,
-          "client cert: %s",
-          SSL_CONN_CONFIG(clientcert)?
-          SSL_CONN_CONFIG(clientcert): "none");
-  }
-
-  ciphers = SSL_CONN_CONFIG(cipher_list);
-  if(ciphers) {
-#ifdef MESALINK_HAVE_CIPHER
-    if(!SSL_CTX_set_cipher_list(backend->ctx, ciphers)) {
-      failf(data, "failed setting cipher list: %s", ciphers);
-      return CURLE_SSL_CIPHER;
-    }
-#endif
-    infof(data, "Cipher selection: %s", ciphers);
-  }
-
-  if(backend->handle)
-    SSL_free(backend->handle);
-  backend->handle = SSL_new(backend->ctx);
-  if(!backend->handle) {
-    failf(data, "SSL: couldn't create a context (handle)!");
-    return CURLE_OUT_OF_MEMORY;
-  }
-
-  if((hostname_len < USHRT_MAX) &&
-     (0 == Curl_inet_pton(AF_INET, hostname, &addr4))
-#ifdef ENABLE_IPV6
-     && (0 == Curl_inet_pton(AF_INET6, hostname, &addr6))
-#endif
-  ) {
-    /* hostname is not a valid IP address */
-    if(SSL_set_tlsext_host_name(backend->handle, hostname) != SSL_SUCCESS) {
-      failf(data,
-            "WARNING: failed to configure server name indication (SNI) "
-            "TLS extension\n");
-      return CURLE_SSL_CONNECT_ERROR;
-    }
-  }
-  else {
-#ifdef CURLDEBUG
-    /* Check if the hostname is 127.0.0.1 or [::1];
-     * otherwise reject because MesaLink always wants a valid DNS Name
-     * specified in RFC 5280 Section 7.2 */
-    if(strncmp(hostname, "127.0.0.1", 9) == 0
-#ifdef ENABLE_IPV6
-       || strncmp(hostname, "[::1]", 5) == 0
-#endif
-    ) {
-      SSL_set_tlsext_host_name(backend->handle, "localhost");
-    }
-    else
-#endif
-    {
-      failf(data,
-            "ERROR: MesaLink does not accept an IP address as a hostname\n");
-      return CURLE_SSL_CONNECT_ERROR;
-    }
-  }
-
-#ifdef MESALINK_HAVE_SESSION
-  if(SSL_SET_OPTION(primary.sessionid)) {
-    void *ssl_sessionid = NULL;
-
-    Curl_ssl_sessionid_lock(data);
-    if(!Curl_ssl_getsessionid(data, conn,
-                              SSL_IS_PROXY() ? TRUE : FALSE,
-                              &ssl_sessionid, NULL, sockindex)) {
-      /* we got a session id, use it! */
-      if(!SSL_set_session(backend->handle, ssl_sessionid)) {
-        Curl_ssl_sessionid_unlock(data);
-        failf(
-          data,
-          "SSL: SSL_set_session failed: %s",
-          ERR_error_string(SSL_get_error(backend->handle, 0), error_buffer));
-        return CURLE_SSL_CONNECT_ERROR;
-      }
-      /* Informational message */
-      infof(data, "SSL re-using session ID");
-    }
-    Curl_ssl_sessionid_unlock(data);
-  }
-#endif /* MESALINK_HAVE_SESSION */
-
-  if(SSL_set_fd(backend->handle, (int)sockfd) != SSL_SUCCESS) {
-    failf(data, "SSL: SSL_set_fd failed");
-    return CURLE_SSL_CONNECT_ERROR;
-  }
-
-  connssl->connecting_state = ssl_connect_2;
-  return CURLE_OK;
-}
-
-static CURLcode
-mesalink_connect_step2(struct Curl_easy *data,
-                       struct connectdata *conn, int sockindex)
-{
-  int ret = -1;
-  struct ssl_connect_data *connssl = &conn->ssl[sockindex];
-  struct ssl_backend_data *backend = connssl->backend;
-
-  conn->recv[sockindex] = mesalink_recv;
-  conn->send[sockindex] = mesalink_send;
-
-  ret = SSL_connect(backend->handle);
-  if(ret != SSL_SUCCESS) {
-    int detail = SSL_get_error(backend->handle, ret);
-
-    if(SSL_ERROR_WANT_CONNECT == detail || SSL_ERROR_WANT_READ == detail) {
-      connssl->connecting_state = ssl_connect_2_reading;
-      return CURLE_OK;
-    }
-    else {
-      char error_buffer[MESALINK_MAX_ERROR_SZ];
-      failf(data,
-            "SSL_connect failed with error %d: %s",
-            detail,
-            ERR_error_string_n(detail, error_buffer, sizeof(error_buffer)));
-      ERR_print_errors_fp(stderr);
-      if(detail && SSL_CONN_CONFIG(verifypeer)) {
-        detail &= ~0xFF;
-        if(detail == TLS_ERROR_WEBPKI_ERRORS) {
-          failf(data, "Cert verify failed");
-          return CURLE_PEER_FAILED_VERIFICATION;
-        }
-      }
-      return CURLE_SSL_CONNECT_ERROR;
-    }
-  }
-
-  connssl->connecting_state = ssl_connect_3;
-  infof(data,
-        "SSL connection using %s / %s",
-        SSL_get_version(backend->handle),
-        SSL_get_cipher_name(backend->handle));
-
-  return CURLE_OK;
-}
-
-static CURLcode
-mesalink_connect_step3(struct connectdata *conn, int sockindex)
-{
-  CURLcode result = CURLE_OK;
-  struct ssl_connect_data *connssl = &conn->ssl[sockindex];
-
-  DEBUGASSERT(ssl_connect_3 == connssl->connecting_state);
-
-#ifdef MESALINK_HAVE_SESSION
-  if(SSL_SET_OPTION(primary.sessionid)) {
-    bool incache;
-    SSL_SESSION *our_ssl_sessionid;
-    void *old_ssl_sessionid = NULL;
-    bool isproxy = SSL_IS_PROXY() ? TRUE : FALSE;
-    struct ssl_backend_data *backend = connssl->backend;
-
-    our_ssl_sessionid = SSL_get_session(backend->handle);
-
-    Curl_ssl_sessionid_lock(data);
-    incache =
-      !(Curl_ssl_getsessionid(data, conn, isproxy, &old_ssl_sessionid, NULL,
-                              sockindex));
-    if(incache) {
-      if(old_ssl_sessionid != our_ssl_sessionid) {
-        infof(data, "old SSL session ID is stale, removing");
-        Curl_ssl_delsessionid(data, old_ssl_sessionid);
-        incache = FALSE;
-      }
-    }
-
-    if(!incache) {
-      result =
-        Curl_ssl_addsessionid(data, conn, isproxy, our_ssl_sessionid, 0,
-                              sockindex, NULL);
-      if(result) {
-        Curl_ssl_sessionid_unlock(data);
-        failf(data, "failed to store ssl session");
-        return result;
-      }
-    }
-    Curl_ssl_sessionid_unlock(data);
-  }
-#endif /* MESALINK_HAVE_SESSION */
-
-  connssl->connecting_state = ssl_connect_done;
-
-  return result;
-}
-
-static ssize_t
-mesalink_send(struct Curl_easy *data, int sockindex, const void *mem,
-              size_t len, CURLcode *curlcode)
-{
-  struct connectdata *conn = data->conn;
-  struct ssl_connect_data *connssl = &conn->ssl[sockindex];
-  struct ssl_backend_data *backend = connssl->backend;
-  char error_buffer[MESALINK_MAX_ERROR_SZ];
-  int memlen = (len > (size_t)INT_MAX) ? INT_MAX : (int)len;
-  int rc = SSL_write(backend->handle, mem, memlen);
-
-  if(rc < 0) {
-    int err = SSL_get_error(backend->handle, rc);
-    switch(err) {
-    case SSL_ERROR_WANT_READ:
-    case SSL_ERROR_WANT_WRITE:
-      /* there's data pending, re-invoke SSL_write() */
-      *curlcode = CURLE_AGAIN;
-      return -1;
-    default:
-      failf(data,
-            "SSL write: %s, errno %d",
-            ERR_error_string_n(err, error_buffer, sizeof(error_buffer)),
-            SOCKERRNO);
-      *curlcode = CURLE_SEND_ERROR;
-      return -1;
-    }
-  }
-  return rc;
-}
-
-static void
-mesalink_close(struct Curl_easy *data, struct connectdata *conn, int sockindex)
-{
-  struct ssl_connect_data *connssl = &conn->ssl[sockindex];
-  struct ssl_backend_data *backend = connssl->backend;
-
-  (void) data;
-
-  if(backend->handle) {
-    (void)SSL_shutdown(backend->handle);
-    SSL_free(backend->handle);
-    backend->handle = NULL;
-  }
-  if(backend->ctx) {
-    SSL_CTX_free(backend->ctx);
-    backend->ctx = NULL;
-  }
-}
-
-static ssize_t
-mesalink_recv(struct Curl_easy *data, int num, char *buf, size_t buffersize,
-              CURLcode *curlcode)
-{
-  struct connectdata *conn = data->conn;
-  struct ssl_connect_data *connssl = &conn->ssl[num];
-  struct ssl_backend_data *backend = connssl->backend;
-  char error_buffer[MESALINK_MAX_ERROR_SZ];
-  int buffsize = (buffersize > (size_t)INT_MAX) ? INT_MAX : (int)buffersize;
-  int nread = SSL_read(backend->handle, buf, buffsize);
-
-  if(nread <= 0) {
-    int err = SSL_get_error(backend->handle, nread);
-
-    switch(err) {
-    case SSL_ERROR_ZERO_RETURN: /* no more data */
-    case IO_ERROR_CONNECTION_ABORTED:
-      break;
-    case SSL_ERROR_WANT_READ:
-    case SSL_ERROR_WANT_WRITE:
-      /* there's data pending, re-invoke SSL_read() */
-      *curlcode = CURLE_AGAIN;
-      return -1;
-    default:
-      failf(data,
-            "SSL read: %s, errno %d",
-            ERR_error_string_n(err, error_buffer, sizeof(error_buffer)),
-            SOCKERRNO);
-      *curlcode = CURLE_RECV_ERROR;
-      return -1;
-    }
-  }
-  return nread;
-}
-
-static size_t
-mesalink_version(char *buffer, size_t size)
-{
-  return msnprintf(buffer, size, "MesaLink/%s", MESALINK_VERSION_STRING);
-}
-
-static int
-mesalink_init(void)
-{
-  return (SSL_library_init() == SSL_SUCCESS);
-}
-
-/*
- * This function is called to shut down the SSL layer but keep the
- * socket open (CCC - Clear Command Channel)
- */
-static int
-mesalink_shutdown(struct Curl_easy *data,
-                  struct connectdata *conn, int sockindex)
-{
-  int retval = 0;
-  struct ssl_connect_data *connssl = &conn->ssl[sockindex];
-  struct ssl_backend_data *backend = connssl->backend;
-
-  (void) data;
-
-  if(backend->handle) {
-    SSL_free(backend->handle);
-    backend->handle = NULL;
-  }
-  return retval;
-}
-
-static CURLcode
-mesalink_connect_common(struct Curl_easy *data, struct connectdata *conn,
-                        int sockindex, bool nonblocking, bool *done)
-{
-  CURLcode result;
-  struct ssl_connect_data *connssl = &conn->ssl[sockindex];
-  curl_socket_t sockfd = conn->sock[sockindex];
-  timediff_t timeout_ms;
-  int what;
-
-  /* check if the connection has already been established */
-  if(ssl_connection_complete == connssl->state) {
-    *done = TRUE;
-    return CURLE_OK;
-  }
-
-  if(ssl_connect_1 == connssl->connecting_state) {
-    /* Find out how much more time we're allowed */
-    timeout_ms = Curl_timeleft(data, NULL, TRUE);
-
-    if(timeout_ms < 0) {
-      /* no need to continue if time already is up */
-      failf(data, "SSL connection timeout");
-      return CURLE_OPERATION_TIMEDOUT;
-    }
-
-    result = mesalink_connect_step1(data, conn, sockindex);
-    if(result)
-      return result;
-  }
-
-  while(ssl_connect_2 == connssl->connecting_state ||
-        ssl_connect_2_reading == connssl->connecting_state ||
-        ssl_connect_2_writing == connssl->connecting_state) {
-
-    /* check allowed time left */
-    timeout_ms = Curl_timeleft(data, NULL, TRUE);
-
-    if(timeout_ms < 0) {
-      /* no need to continue if time already is up */
-      failf(data, "SSL connection timeout");
-      return CURLE_OPERATION_TIMEDOUT;
-    }
-
-    /* if ssl is expecting something, check if it's available. */
-    if(connssl->connecting_state == ssl_connect_2_reading ||
-       connssl->connecting_state == ssl_connect_2_writing) {
-
-      curl_socket_t writefd =
-        ssl_connect_2_writing == connssl->connecting_state ? sockfd
-                                                           : CURL_SOCKET_BAD;
-      curl_socket_t readfd = ssl_connect_2_reading == connssl->connecting_state
-                               ? sockfd
-                               : CURL_SOCKET_BAD;
-
-      what = Curl_socket_check(readfd, CURL_SOCKET_BAD, writefd,
-                               nonblocking ? 0 : timeout_ms);
-      if(what < 0) {
-        /* fatal error */
-        failf(data, "select/poll on SSL socket, errno: %d", SOCKERRNO);
-        return CURLE_SSL_CONNECT_ERROR;
-      }
-      else if(0 == what) {
-        if(nonblocking) {
-          *done = FALSE;
-          return CURLE_OK;
-        }
-        else {
-          /* timeout */
-          failf(data, "SSL connection timeout");
-          return CURLE_OPERATION_TIMEDOUT;
-        }
-      }
-      /* socket is readable or writable */
-    }
-
-    /* Run transaction, and return to the caller if it failed or if
-     * this connection is part of a multi handle and this loop would
-     * execute again. This permits the owner of a multi handle to
-     * abort a connection attempt before step2 has completed while
-     * ensuring that a client using select() or epoll() will always
-     * have a valid fdset to wait on.
-     */
-    result = mesalink_connect_step2(data, conn, sockindex);
-
-    if(result ||
-       (nonblocking && (ssl_connect_2 == connssl->connecting_state ||
-                        ssl_connect_2_reading == connssl->connecting_state ||
-                        ssl_connect_2_writing == connssl->connecting_state))) {
-      return result;
-    }
-  } /* repeat step2 until all transactions are done. */
-
-  if(ssl_connect_3 == connssl->connecting_state) {
-    result = mesalink_connect_step3(conn, sockindex);
-    if(result)
-      return result;
-  }
-
-  if(ssl_connect_done == connssl->connecting_state) {
-    connssl->state = ssl_connection_complete;
-    conn->recv[sockindex] = mesalink_recv;
-    conn->send[sockindex] = mesalink_send;
-    *done = TRUE;
-  }
-  else
-    *done = FALSE;
-
-  /* Reset our connect state machine */
-  connssl->connecting_state = ssl_connect_1;
-
-  return CURLE_OK;
-}
-
-static CURLcode
-mesalink_connect_nonblocking(struct Curl_easy *data, struct connectdata *conn,
-                             int sockindex, bool *done)
-{
-  return mesalink_connect_common(data, conn, sockindex, TRUE, done);
-}
-
-static CURLcode
-mesalink_connect(struct Curl_easy *data, struct connectdata *conn,
-                 int sockindex)
-{
-  CURLcode result;
-  bool done = FALSE;
-
-  result = mesalink_connect_common(data, conn, sockindex, FALSE, &done);
-  if(result)
-    return result;
-
-  DEBUGASSERT(done);
-
-  return CURLE_OK;
-}
-
-static void *
-mesalink_get_internals(struct ssl_connect_data *connssl,
-                       CURLINFO info UNUSED_PARAM)
-{
-  struct ssl_backend_data *backend = connssl->backend;
-  (void)info;
-  return backend->handle;
-}
-
-const struct Curl_ssl Curl_ssl_mesalink = {
-  { CURLSSLBACKEND_MESALINK, "MesaLink" }, /* info */
-
-  SSLSUPP_SSL_CTX,
-
-  sizeof(struct ssl_backend_data),
-
-  mesalink_init,                 /* init */
-  Curl_none_cleanup,             /* cleanup */
-  mesalink_version,              /* version */
-  Curl_none_check_cxn,           /* check_cxn */
-  mesalink_shutdown,             /* shutdown */
-  Curl_none_data_pending,        /* data_pending */
-  Curl_none_random,              /* random */
-  Curl_none_cert_status_request, /* cert_status_request */
-  mesalink_connect,              /* connect */
-  mesalink_connect_nonblocking,  /* connect_nonblocking */
-  Curl_ssl_getsock,              /* getsock */
-  mesalink_get_internals,        /* get_internals */
-  mesalink_close,                /* close_one */
-  Curl_none_close_all,           /* close_all */
-  Curl_none_session_free,        /* session_free */
-  Curl_none_set_engine,          /* set_engine */
-  Curl_none_set_engine_default,  /* set_engine_default */
-  Curl_none_engines_list,        /* engines_list */
-  Curl_none_false_start,         /* false_start */
-  NULL,                          /* sha256sum */
-  NULL,                          /* associate_connection */
-  NULL                           /* disassociate_connection */
-};
-
-#endif