| /*************************************************************************** |
| * _ _ ____ _ |
| * 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(USE_SSH) |
| |
| #include <curl/curl.h> |
| #include "curl_memory.h" |
| #include "curl_path.h" |
| #include "escape.h" |
| #include "memdebug.h" |
| |
| /* figure out the path to work with in this particular request */ |
| CURLcode Curl_getworkingpath(struct connectdata *conn, |
| char *homedir, /* when SFTP is used */ |
| char **path) /* returns the allocated |
| real path to work with */ |
| { |
| struct Curl_easy *data = conn->data; |
| char *real_path = NULL; |
| char *working_path; |
| size_t working_path_len; |
| CURLcode result = |
| Curl_urldecode(data, data->state.up.path, 0, &working_path, |
| &working_path_len, FALSE); |
| if(result) |
| return result; |
| |
| /* Check for /~/, indicating relative to the user's home directory */ |
| if(conn->handler->protocol & CURLPROTO_SCP) { |
| real_path = malloc(working_path_len + 1); |
| if(real_path == NULL) { |
| free(working_path); |
| return CURLE_OUT_OF_MEMORY; |
| } |
| if((working_path_len > 3) && (!memcmp(working_path, "/~/", 3))) |
| /* It is referenced to the home directory, so strip the leading '/~/' */ |
| memcpy(real_path, working_path + 3, working_path_len - 2); |
| else |
| memcpy(real_path, working_path, 1 + working_path_len); |
| } |
| else if(conn->handler->protocol & CURLPROTO_SFTP) { |
| if((working_path_len > 1) && (working_path[1] == '~')) { |
| size_t homelen = strlen(homedir); |
| real_path = malloc(homelen + working_path_len + 1); |
| if(real_path == NULL) { |
| free(working_path); |
| return CURLE_OUT_OF_MEMORY; |
| } |
| /* It is referenced to the home directory, so strip the |
| leading '/' */ |
| memcpy(real_path, homedir, homelen); |
| real_path[homelen] = '/'; |
| real_path[homelen + 1] = '\0'; |
| if(working_path_len > 3) { |
| memcpy(real_path + homelen + 1, working_path + 3, |
| 1 + working_path_len -3); |
| } |
| } |
| else { |
| real_path = malloc(working_path_len + 1); |
| if(real_path == NULL) { |
| free(working_path); |
| return CURLE_OUT_OF_MEMORY; |
| } |
| memcpy(real_path, working_path, 1 + working_path_len); |
| } |
| } |
| |
| free(working_path); |
| |
| /* store the pointer for the caller to receive */ |
| *path = real_path; |
| |
| return CURLE_OK; |
| } |
| |
| /* The get_pathname() function is being borrowed from OpenSSH sftp.c |
| version 4.6p1. */ |
| /* |
| * Copyright (c) 2001-2004 Damien Miller <djm@openbsd.org> |
| * |
| * Permission to use, copy, modify, and distribute this software for any |
| * purpose with or without fee is hereby granted, provided that the above |
| * copyright notice and this permission notice appear in all copies. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| */ |
| CURLcode Curl_get_pathname(const char **cpp, char **path, char *homedir) |
| { |
| const char *cp = *cpp, *end; |
| char quot; |
| unsigned int i, j; |
| size_t fullPathLength, pathLength; |
| bool relativePath = false; |
| static const char WHITESPACE[] = " \t\r\n"; |
| |
| if(!*cp) { |
| *cpp = NULL; |
| *path = NULL; |
| return CURLE_QUOTE_ERROR; |
| } |
| /* Ignore leading whitespace */ |
| cp += strspn(cp, WHITESPACE); |
| /* Allocate enough space for home directory and filename + separator */ |
| fullPathLength = strlen(cp) + strlen(homedir) + 2; |
| *path = malloc(fullPathLength); |
| if(*path == NULL) |
| return CURLE_OUT_OF_MEMORY; |
| |
| /* Check for quoted filenames */ |
| if(*cp == '\"' || *cp == '\'') { |
| quot = *cp++; |
| |
| /* Search for terminating quote, unescape some chars */ |
| for(i = j = 0; i <= strlen(cp); i++) { |
| if(cp[i] == quot) { /* Found quote */ |
| i++; |
| (*path)[j] = '\0'; |
| break; |
| } |
| if(cp[i] == '\0') { /* End of string */ |
| /*error("Unterminated quote");*/ |
| goto fail; |
| } |
| if(cp[i] == '\\') { /* Escaped characters */ |
| i++; |
| if(cp[i] != '\'' && cp[i] != '\"' && |
| cp[i] != '\\') { |
| /*error("Bad escaped character '\\%c'", |
| cp[i]);*/ |
| goto fail; |
| } |
| } |
| (*path)[j++] = cp[i]; |
| } |
| |
| if(j == 0) { |
| /*error("Empty quotes");*/ |
| goto fail; |
| } |
| *cpp = cp + i + strspn(cp + i, WHITESPACE); |
| } |
| else { |
| /* Read to end of filename - either to white space or terminator */ |
| end = strpbrk(cp, WHITESPACE); |
| if(end == NULL) |
| end = strchr(cp, '\0'); |
| /* return pointer to second parameter if it exists */ |
| *cpp = end + strspn(end, WHITESPACE); |
| pathLength = 0; |
| relativePath = (cp[0] == '/' && cp[1] == '~' && cp[2] == '/'); |
| /* Handling for relative path - prepend home directory */ |
| if(relativePath) { |
| strcpy(*path, homedir); |
| pathLength = strlen(homedir); |
| (*path)[pathLength++] = '/'; |
| (*path)[pathLength] = '\0'; |
| cp += 3; |
| } |
| /* Copy path name up until first "white space" */ |
| memcpy(&(*path)[pathLength], cp, (int)(end - cp)); |
| pathLength += (int)(end - cp); |
| (*path)[pathLength] = '\0'; |
| } |
| return CURLE_OK; |
| |
| fail: |
| Curl_safefree(*path); |
| return CURLE_QUOTE_ERROR; |
| } |
| |
| #endif /* if SSH is used */ |
