1 files changed, 0 insertions, 579 deletions

diff --git a/libs/libcurl/src/security.c b/libs/libcurl/src/security.c
deleted file mode 100644
index fbfa707413..0000000000
--- a/libs/libcurl/src/security.c
+++ /dev/null
@@ -1,579 +0,0 @@
-/* This source code was modified by Martin Hedenfalk <mhe@stacken.kth.se> for
- * use in Curl. His latest changes were done 2000-09-18.
- *
- * It has since been patched and modified a lot by Daniel Stenberg
- * <daniel@haxx.se> to make it better applied to curl conditions, and to make
- * it not use globals, pollute name space and more. This source code awaits a
- * rewrite to work around the paragraph 2 in the BSD licenses as explained
- * below.
- *
- * Copyright (c) 1998, 1999, 2017 Kungliga Tekniska Högskolan
- * (Royal Institute of Technology, Stockholm, Sweden).
- *
- * Copyright (C) 2001 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
- *
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * 3. Neither the name of the Institute nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.  */
-
-#include "curl_setup.h"
-
-#ifndef CURL_DISABLE_FTP
-#ifdef HAVE_GSSAPI
-
-#ifdef HAVE_NETDB_H
-#include <netdb.h>
-#endif
-
-#include <limits.h>
-
-#include "urldata.h"
-#include "curl_base64.h"
-#include "curl_memory.h"
-#include "curl_sec.h"
-#include "ftp.h"
-#include "sendf.h"
-#include "strcase.h"
-#include "warnless.h"
-#include "strdup.h"
-/* The last 3 #include files should be in this order */
-#include "curl_printf.h"
-#include "curl_memory.h"
-#include "memdebug.h"
-
-static const struct {
-  enum protection_level level;
-  const char *name;
-} level_names[] = {
-  { PROT_CLEAR, "clear" },
-  { PROT_SAFE, "safe" },
-  { PROT_CONFIDENTIAL, "confidential" },
-  { PROT_PRIVATE, "private" }
-};
-
-static enum protection_level
-name_to_level(const char *name)
-{
-  int i;
-  for(i = 0; i < (int)sizeof(level_names)/(int)sizeof(level_names[0]); i++)
-    if(checkprefix(name, level_names[i].name))
-      return level_names[i].level;
-  return PROT_NONE;
-}
-
-/* Convert a protocol |level| to its char representation.
-   We take an int to catch programming mistakes. */
-static char level_to_char(int level)
-{
-  switch(level) {
-  case PROT_CLEAR:
-    return 'C';
-  case PROT_SAFE:
-    return 'S';
-  case PROT_CONFIDENTIAL:
-    return 'E';
-  case PROT_PRIVATE:
-    return 'P';
-  case PROT_CMD:
-    /* Fall through */
-  default:
-    /* Those 2 cases should not be reached! */
-    break;
-  }
-  DEBUGASSERT(0);
-  /* Default to the most secure alternative. */
-  return 'P';
-}
-
-/* Send an FTP command defined by |message| and the optional arguments. The
-   function returns the ftp_code. If an error occurs, -1 is returned. */
-static int ftp_send_command(struct connectdata *conn, const char *message, ...)
-{
-  int ftp_code;
-  ssize_t nread = 0;
-  va_list args;
-  char print_buffer[50];
-
-  va_start(args, message);
-  mvsnprintf(print_buffer, sizeof(print_buffer), message, args);
-  va_end(args);
-
-  if(Curl_ftpsend(conn, print_buffer)) {
-    ftp_code = -1;
-  }
-  else {
-    if(Curl_GetFTPResponse(&nread, conn, &ftp_code))
-      ftp_code = -1;
-  }
-
-  (void)nread; /* Unused */
-  return ftp_code;
-}
-
-/* Read |len| from the socket |fd| and store it in |to|. Return a CURLcode
-   saying whether an error occurred or CURLE_OK if |len| was read. */
-static CURLcode
-socket_read(curl_socket_t fd, void *to, size_t len)
-{
-  char *to_p = to;
-  CURLcode result;
-  ssize_t nread = 0;
-
-  while(len > 0) {
-    result = Curl_read_plain(fd, to_p, len, &nread);
-    if(!result) {
-      len -= nread;
-      to_p += nread;
-    }
-    else {
-      if(result == CURLE_AGAIN)
-        continue;
-      return result;
-    }
-  }
-  return CURLE_OK;
-}
-
-
-/* Write |len| bytes from the buffer |to| to the socket |fd|. Return a
-   CURLcode saying whether an error occurred or CURLE_OK if |len| was
-   written. */
-static CURLcode
-socket_write(struct connectdata *conn, curl_socket_t fd, const void *to,
-             size_t len)
-{
-  const char *to_p = to;
-  CURLcode result;
-  ssize_t written;
-
-  while(len > 0) {
-    result = Curl_write_plain(conn, fd, to_p, len, &written);
-    if(!result) {
-      len -= written;
-      to_p += written;
-    }
-    else {
-      if(result == CURLE_AGAIN)
-        continue;
-      return result;
-    }
-  }
-  return CURLE_OK;
-}
-
-static CURLcode read_data(struct connectdata *conn,
-                          curl_socket_t fd,
-                          struct krb5buffer *buf)
-{
-  int len;
-  CURLcode result;
-
-  result = socket_read(fd, &len, sizeof(len));
-  if(result)
-    return result;
-
-  if(len) {
-    /* only realloc if there was a length */
-    len = ntohl(len);
-    buf->data = Curl_saferealloc(buf->data, len);
-  }
-  if(!len || !buf->data)
-    return CURLE_OUT_OF_MEMORY;
-
-  result = socket_read(fd, buf->data, len);
-  if(result)
-    return result;
-  buf->size = conn->mech->decode(conn->app_data, buf->data, len,
-                                 conn->data_prot, conn);
-  buf->index = 0;
-  return CURLE_OK;
-}
-
-static size_t
-buffer_read(struct krb5buffer *buf, void *data, size_t len)
-{
-  if(buf->size - buf->index < len)
-    len = buf->size - buf->index;
-  memcpy(data, (char *)buf->data + buf->index, len);
-  buf->index += len;
-  return len;
-}
-
-/* Matches Curl_recv signature */
-static ssize_t sec_recv(struct connectdata *conn, int sockindex,
-                        char *buffer, size_t len, CURLcode *err)
-{
-  size_t bytes_read;
-  size_t total_read = 0;
-  curl_socket_t fd = conn->sock[sockindex];
-
-  *err = CURLE_OK;
-
-  /* Handle clear text response. */
-  if(conn->sec_complete == 0 || conn->data_prot == PROT_CLEAR)
-      return sread(fd, buffer, len);
-
-  if(conn->in_buffer.eof_flag) {
-    conn->in_buffer.eof_flag = 0;
-    return 0;
-  }
-
-  bytes_read = buffer_read(&conn->in_buffer, buffer, len);
-  len -= bytes_read;
-  total_read += bytes_read;
-  buffer += bytes_read;
-
-  while(len > 0) {
-    if(read_data(conn, fd, &conn->in_buffer))
-      return -1;
-    if(conn->in_buffer.size == 0) {
-      if(bytes_read > 0)
-        conn->in_buffer.eof_flag = 1;
-      return bytes_read;
-    }
-    bytes_read = buffer_read(&conn->in_buffer, buffer, len);
-    len -= bytes_read;
-    total_read += bytes_read;
-    buffer += bytes_read;
-  }
-  return total_read;
-}
-
-/* Send |length| bytes from |from| to the |fd| socket taking care of encoding
-   and negotiating with the server. |from| can be NULL. */
-static void do_sec_send(struct connectdata *conn, curl_socket_t fd,
-                        const char *from, int length)
-{
-  int bytes, htonl_bytes; /* 32-bit integers for htonl */
-  char *buffer = NULL;
-  char *cmd_buffer;
-  size_t cmd_size = 0;
-  CURLcode error;
-  enum protection_level prot_level = conn->data_prot;
-  bool iscmd = (prot_level == PROT_CMD)?TRUE:FALSE;
-
-  DEBUGASSERT(prot_level > PROT_NONE && prot_level < PROT_LAST);
-
-  if(iscmd) {
-    if(!strncmp(from, "PASS ", 5) || !strncmp(from, "ACCT ", 5))
-      prot_level = PROT_PRIVATE;
-    else
-      prot_level = conn->command_prot;
-  }
-  bytes = conn->mech->encode(conn->app_data, from, length, prot_level,
-                             (void **)&buffer);
-  if(!buffer || bytes <= 0)
-    return; /* error */
-
-  if(iscmd) {
-    error = Curl_base64_encode(conn->data, buffer, curlx_sitouz(bytes),
-                               &cmd_buffer, &cmd_size);
-    if(error) {
-      free(buffer);
-      return; /* error */
-    }
-    if(cmd_size > 0) {
-      static const char *enc = "ENC ";
-      static const char *mic = "MIC ";
-      if(prot_level == PROT_PRIVATE)
-        socket_write(conn, fd, enc, 4);
-      else
-        socket_write(conn, fd, mic, 4);
-
-      socket_write(conn, fd, cmd_buffer, cmd_size);
-      socket_write(conn, fd, "\r\n", 2);
-      infof(conn->data, "Send: %s%s\n", prot_level == PROT_PRIVATE?enc:mic,
-            cmd_buffer);
-      free(cmd_buffer);
-    }
-  }
-  else {
-    htonl_bytes = htonl(bytes);
-    socket_write(conn, fd, &htonl_bytes, sizeof(htonl_bytes));
-    socket_write(conn, fd, buffer, curlx_sitouz(bytes));
-  }
-  free(buffer);
-}
-
-static ssize_t sec_write(struct connectdata *conn, curl_socket_t fd,
-                         const char *buffer, size_t length)
-{
-  ssize_t tx = 0, len = conn->buffer_size;
-
-  len -= conn->mech->overhead(conn->app_data, conn->data_prot,
-                              curlx_sztosi(len));
-  if(len <= 0)
-    len = length;
-  while(length) {
-    if(length < (size_t)len)
-      len = length;
-
-    do_sec_send(conn, fd, buffer, curlx_sztosi(len));
-    length -= len;
-    buffer += len;
-    tx += len;
-  }
-  return tx;
-}
-
-/* Matches Curl_send signature */
-static ssize_t sec_send(struct connectdata *conn, int sockindex,
-                        const void *buffer, size_t len, CURLcode *err)
-{
-  curl_socket_t fd = conn->sock[sockindex];
-  *err = CURLE_OK;
-  return sec_write(conn, fd, buffer, len);
-}
-
-int Curl_sec_read_msg(struct connectdata *conn, char *buffer,
-                      enum protection_level level)
-{
-  /* decoded_len should be size_t or ssize_t but conn->mech->decode returns an
-     int */
-  int decoded_len;
-  char *buf;
-  int ret_code = 0;
-  size_t decoded_sz = 0;
-  CURLcode error;
-
-  if(!conn->mech)
-    /* not inititalized, return error */
-    return -1;
-
-  DEBUGASSERT(level > PROT_NONE && level < PROT_LAST);
-
-  error = Curl_base64_decode(buffer + 4, (unsigned char **)&buf, &decoded_sz);
-  if(error || decoded_sz == 0)
-    return -1;
-
-  if(decoded_sz > (size_t)INT_MAX) {
-    free(buf);
-    return -1;
-  }
-  decoded_len = curlx_uztosi(decoded_sz);
-
-  decoded_len = conn->mech->decode(conn->app_data, buf, decoded_len,
-                                   level, conn);
-  if(decoded_len <= 0) {
-    free(buf);
-    return -1;
-  }
-
-  if(conn->data->set.verbose) {
-    buf[decoded_len] = '\n';
-    Curl_debug(conn->data, CURLINFO_HEADER_IN, buf, decoded_len + 1);
-  }
-
-  buf[decoded_len] = '\0';
-  if(decoded_len <= 3)
-    /* suspiciously short */
-    return 0;
-
-  if(buf[3] != '-')
-    /* safe to ignore return code */
-    (void)sscanf(buf, "%d", &ret_code);
-
-  if(buf[decoded_len - 1] == '\n')
-    buf[decoded_len - 1] = '\0';
-  strcpy(buffer, buf);
-  free(buf);
-  return ret_code;
-}
-
-static int sec_set_protection_level(struct connectdata *conn)
-{
-  int code;
-  enum protection_level level = conn->request_data_prot;
-
-  DEBUGASSERT(level > PROT_NONE && level < PROT_LAST);
-
-  if(!conn->sec_complete) {
-    infof(conn->data, "Trying to change the protection level after the"
-                      " completion of the data exchange.\n");
-    return -1;
-  }
-
-  /* Bail out if we try to set up the same level */
-  if(conn->data_prot == level)
-    return 0;
-
-  if(level) {
-    char *pbsz;
-    static unsigned int buffer_size = 1 << 20; /* 1048576 */
-
-    code = ftp_send_command(conn, "PBSZ %u", buffer_size);
-    if(code < 0)
-      return -1;
-
-    if(code/100 != 2) {
-      failf(conn->data, "Failed to set the protection's buffer size.");
-      return -1;
-    }
-    conn->buffer_size = buffer_size;
-
-    pbsz = strstr(conn->data->state.buffer, "PBSZ=");
-    if(pbsz) {
-      /* ignore return code, use default value if it fails */
-      (void)sscanf(pbsz, "PBSZ=%u", &buffer_size);
-      if(buffer_size < conn->buffer_size)
-        conn->buffer_size = buffer_size;
-    }
-  }
-
-  /* Now try to negiociate the protection level. */
-  code = ftp_send_command(conn, "PROT %c", level_to_char(level));
-
-  if(code < 0)
-    return -1;
-
-  if(code/100 != 2) {
-    failf(conn->data, "Failed to set the protection level.");
-    return -1;
-  }
-
-  conn->data_prot = level;
-  if(level == PROT_PRIVATE)
-    conn->command_prot = level;
-
-  return 0;
-}
-
-int
-Curl_sec_request_prot(struct connectdata *conn, const char *level)
-{
-  enum protection_level l = name_to_level(level);
-  if(l == PROT_NONE)
-    return -1;
-  DEBUGASSERT(l > PROT_NONE && l < PROT_LAST);
-  conn->request_data_prot = l;
-  return 0;
-}
-
-static CURLcode choose_mech(struct connectdata *conn)
-{
-  int ret;
-  struct Curl_easy *data = conn->data;
-  void *tmp_allocation;
-  const struct Curl_sec_client_mech *mech = &Curl_krb5_client_mech;
-
-  tmp_allocation = realloc(conn->app_data, mech->size);
-  if(tmp_allocation == NULL) {
-    failf(data, "Failed realloc of size %zu", mech->size);
-    mech = NULL;
-    return CURLE_OUT_OF_MEMORY;
-  }
-  conn->app_data = tmp_allocation;
-
-  if(mech->init) {
-    ret = mech->init(conn->app_data);
-    if(ret) {
-      infof(data, "Failed initialization for %s. Skipping it.\n",
-            mech->name);
-      return CURLE_FAILED_INIT;
-    }
-  }
-
-  infof(data, "Trying mechanism %s...\n", mech->name);
-  ret = ftp_send_command(conn, "AUTH %s", mech->name);
-  if(ret < 0)
-    return CURLE_COULDNT_CONNECT;
-
-  if(ret/100 != 3) {
-    switch(ret) {
-    case 504:
-      infof(data, "Mechanism %s is not supported by the server (server "
-            "returned ftp code: 504).\n", mech->name);
-      break;
-    case 534:
-      infof(data, "Mechanism %s was rejected by the server (server returned "
-            "ftp code: 534).\n", mech->name);
-      break;
-    default:
-      if(ret/100 == 5) {
-        infof(data, "server does not support the security extensions\n");
-        return CURLE_USE_SSL_FAILED;
-      }
-      break;
-    }
-    return CURLE_LOGIN_DENIED;
-  }
-
-  /* Authenticate */
-  ret = mech->auth(conn->app_data, conn);
-
-  if(ret != AUTH_CONTINUE) {
-    if(ret != AUTH_OK) {
-      /* Mechanism has dumped the error to stderr, don't error here. */
-      return -1;
-    }
-    DEBUGASSERT(ret == AUTH_OK);
-
-    conn->mech = mech;
-    conn->sec_complete = 1;
-    conn->recv[FIRSTSOCKET] = sec_recv;
-    conn->send[FIRSTSOCKET] = sec_send;
-    conn->recv[SECONDARYSOCKET] = sec_recv;
-    conn->send[SECONDARYSOCKET] = sec_send;
-    conn->command_prot = PROT_SAFE;
-    /* Set the requested protection level */
-    /* BLOCKING */
-    (void)sec_set_protection_level(conn);
-  }
-
-  return CURLE_OK;
-}
-
-CURLcode
-Curl_sec_login(struct connectdata *conn)
-{
-  return choose_mech(conn);
-}
-
-
-void
-Curl_sec_end(struct connectdata *conn)
-{
-  if(conn->mech != NULL && conn->mech->end)
-    conn->mech->end(conn->app_data);
-  free(conn->app_data);
-  conn->app_data = NULL;
-  if(conn->in_buffer.data) {
-    free(conn->in_buffer.data);
-    conn->in_buffer.data = NULL;
-    conn->in_buffer.size = 0;
-    conn->in_buffer.index = 0;
-    conn->in_buffer.eof_flag = 0;
-  }
-  conn->sec_complete = 0;
-  conn->data_prot = PROT_CLEAR;
-  conn->mech = NULL;
-}
-
-#endif /* HAVE_GSSAPI */
-
-#endif /* CURL_DISABLE_FTP */