392 строки
10 KiB
C
392 строки
10 KiB
C
/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) 1998 - 2022, Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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* SPDX-License-Identifier: curl
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*
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***************************************************************************/
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#include "curl_setup.h"
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#ifndef CURL_DISABLE_FTP
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#include <curl/curl.h>
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#include "curl_fnmatch.h"
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#include "curl_memory.h"
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/* The last #include file should be: */
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#include "memdebug.h"
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#ifndef HAVE_FNMATCH
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#define CURLFNM_CHARSET_LEN (sizeof(char) * 256)
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#define CURLFNM_CHSET_SIZE (CURLFNM_CHARSET_LEN + 15)
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#define CURLFNM_NEGATE CURLFNM_CHARSET_LEN
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#define CURLFNM_ALNUM (CURLFNM_CHARSET_LEN + 1)
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#define CURLFNM_DIGIT (CURLFNM_CHARSET_LEN + 2)
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#define CURLFNM_XDIGIT (CURLFNM_CHARSET_LEN + 3)
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#define CURLFNM_ALPHA (CURLFNM_CHARSET_LEN + 4)
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#define CURLFNM_PRINT (CURLFNM_CHARSET_LEN + 5)
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#define CURLFNM_BLANK (CURLFNM_CHARSET_LEN + 6)
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#define CURLFNM_LOWER (CURLFNM_CHARSET_LEN + 7)
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#define CURLFNM_GRAPH (CURLFNM_CHARSET_LEN + 8)
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#define CURLFNM_SPACE (CURLFNM_CHARSET_LEN + 9)
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#define CURLFNM_UPPER (CURLFNM_CHARSET_LEN + 10)
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typedef enum {
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CURLFNM_SCHS_DEFAULT = 0,
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CURLFNM_SCHS_RIGHTBR,
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CURLFNM_SCHS_RIGHTBRLEFTBR
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} setcharset_state;
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typedef enum {
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CURLFNM_PKW_INIT = 0,
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CURLFNM_PKW_DDOT
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} parsekey_state;
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typedef enum {
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CCLASS_OTHER = 0,
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CCLASS_DIGIT,
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CCLASS_UPPER,
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CCLASS_LOWER
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} char_class;
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#define SETCHARSET_OK 1
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#define SETCHARSET_FAIL 0
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static int parsekeyword(unsigned char **pattern, unsigned char *charset)
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{
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parsekey_state state = CURLFNM_PKW_INIT;
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#define KEYLEN 10
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char keyword[KEYLEN] = { 0 };
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int found = FALSE;
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int i;
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unsigned char *p = *pattern;
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for(i = 0; !found; i++) {
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char c = *p++;
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if(i >= KEYLEN)
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return SETCHARSET_FAIL;
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switch(state) {
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case CURLFNM_PKW_INIT:
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if(ISLOWER(c))
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keyword[i] = c;
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else if(c == ':')
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state = CURLFNM_PKW_DDOT;
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else
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return SETCHARSET_FAIL;
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break;
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case CURLFNM_PKW_DDOT:
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if(c == ']')
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found = TRUE;
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else
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return SETCHARSET_FAIL;
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}
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}
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#undef KEYLEN
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*pattern = p; /* move caller's pattern pointer */
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if(strcmp(keyword, "digit") == 0)
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charset[CURLFNM_DIGIT] = 1;
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else if(strcmp(keyword, "alnum") == 0)
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charset[CURLFNM_ALNUM] = 1;
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else if(strcmp(keyword, "alpha") == 0)
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charset[CURLFNM_ALPHA] = 1;
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else if(strcmp(keyword, "xdigit") == 0)
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charset[CURLFNM_XDIGIT] = 1;
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else if(strcmp(keyword, "print") == 0)
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charset[CURLFNM_PRINT] = 1;
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else if(strcmp(keyword, "graph") == 0)
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charset[CURLFNM_GRAPH] = 1;
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else if(strcmp(keyword, "space") == 0)
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charset[CURLFNM_SPACE] = 1;
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else if(strcmp(keyword, "blank") == 0)
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charset[CURLFNM_BLANK] = 1;
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else if(strcmp(keyword, "upper") == 0)
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charset[CURLFNM_UPPER] = 1;
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else if(strcmp(keyword, "lower") == 0)
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charset[CURLFNM_LOWER] = 1;
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else
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return SETCHARSET_FAIL;
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return SETCHARSET_OK;
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}
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/* Return the character class. */
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static char_class charclass(unsigned char c)
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{
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if(ISUPPER(c))
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return CCLASS_UPPER;
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if(ISLOWER(c))
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return CCLASS_LOWER;
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if(ISDIGIT(c))
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return CCLASS_DIGIT;
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return CCLASS_OTHER;
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}
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/* Include a character or a range in set. */
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static void setcharorrange(unsigned char **pp, unsigned char *charset)
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{
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unsigned char *p = (*pp)++;
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unsigned char c = *p++;
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charset[c] = 1;
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if(ISALNUM(c) && *p++ == '-') {
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char_class cc = charclass(c);
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unsigned char endrange = *p++;
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if(endrange == '\\')
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endrange = *p++;
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if(endrange >= c && charclass(endrange) == cc) {
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while(c++ != endrange)
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if(charclass(c) == cc) /* Chars in class may be not consecutive. */
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charset[c] = 1;
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*pp = p;
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}
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}
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}
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/* returns 1 (true) if pattern is OK, 0 if is bad ("p" is pattern pointer) */
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static int setcharset(unsigned char **p, unsigned char *charset)
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{
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setcharset_state state = CURLFNM_SCHS_DEFAULT;
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bool something_found = FALSE;
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unsigned char c;
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memset(charset, 0, CURLFNM_CHSET_SIZE);
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for(;;) {
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c = **p;
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if(!c)
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return SETCHARSET_FAIL;
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switch(state) {
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case CURLFNM_SCHS_DEFAULT:
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if(c == ']') {
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if(something_found)
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return SETCHARSET_OK;
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something_found = TRUE;
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state = CURLFNM_SCHS_RIGHTBR;
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charset[c] = 1;
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(*p)++;
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}
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else if(c == '[') {
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unsigned char *pp = *p + 1;
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if(*pp++ == ':' && parsekeyword(&pp, charset))
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*p = pp;
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else {
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charset[c] = 1;
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(*p)++;
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}
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something_found = TRUE;
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}
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else if(c == '^' || c == '!') {
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if(!something_found) {
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if(charset[CURLFNM_NEGATE]) {
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charset[c] = 1;
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something_found = TRUE;
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}
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else
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charset[CURLFNM_NEGATE] = 1; /* negate charset */
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}
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else
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charset[c] = 1;
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(*p)++;
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}
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else if(c == '\\') {
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c = *(++(*p));
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if(c)
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setcharorrange(p, charset);
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else
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charset['\\'] = 1;
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something_found = TRUE;
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}
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else {
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setcharorrange(p, charset);
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something_found = TRUE;
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}
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break;
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case CURLFNM_SCHS_RIGHTBR:
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if(c == '[') {
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state = CURLFNM_SCHS_RIGHTBRLEFTBR;
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charset[c] = 1;
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(*p)++;
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}
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else if(c == ']') {
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return SETCHARSET_OK;
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}
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else if(ISPRINT(c)) {
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charset[c] = 1;
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(*p)++;
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state = CURLFNM_SCHS_DEFAULT;
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}
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else
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/* used 'goto fail' instead of 'return SETCHARSET_FAIL' to avoid a
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* nonsense warning 'statement not reached' at end of the fnc when
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* compiling on Solaris */
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goto fail;
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break;
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case CURLFNM_SCHS_RIGHTBRLEFTBR:
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if(c == ']')
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return SETCHARSET_OK;
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state = CURLFNM_SCHS_DEFAULT;
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charset[c] = 1;
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(*p)++;
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break;
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}
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}
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fail:
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return SETCHARSET_FAIL;
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}
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static int loop(const unsigned char *pattern, const unsigned char *string,
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int maxstars)
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{
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unsigned char *p = (unsigned char *)pattern;
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unsigned char *s = (unsigned char *)string;
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unsigned char charset[CURLFNM_CHSET_SIZE] = { 0 };
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for(;;) {
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unsigned char *pp;
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switch(*p) {
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case '*':
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if(!maxstars)
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return CURL_FNMATCH_NOMATCH;
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/* Regroup consecutive stars and question marks. This can be done because
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'*?*?*' can be expressed as '??*'. */
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for(;;) {
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if(*++p == '\0')
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return CURL_FNMATCH_MATCH;
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if(*p == '?') {
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if(!*s++)
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return CURL_FNMATCH_NOMATCH;
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}
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else if(*p != '*')
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break;
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}
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/* Skip string characters until we find a match with pattern suffix. */
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for(maxstars--; *s; s++) {
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if(loop(p, s, maxstars) == CURL_FNMATCH_MATCH)
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return CURL_FNMATCH_MATCH;
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}
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return CURL_FNMATCH_NOMATCH;
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case '?':
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if(!*s)
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return CURL_FNMATCH_NOMATCH;
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s++;
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p++;
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break;
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case '\0':
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return *s? CURL_FNMATCH_NOMATCH: CURL_FNMATCH_MATCH;
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case '\\':
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if(p[1])
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p++;
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if(*s++ != *p++)
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return CURL_FNMATCH_NOMATCH;
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break;
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case '[':
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pp = p + 1; /* Copy in case of syntax error in set. */
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if(setcharset(&pp, charset)) {
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int found = FALSE;
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if(!*s)
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return CURL_FNMATCH_NOMATCH;
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if(charset[(unsigned int)*s])
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found = TRUE;
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else if(charset[CURLFNM_ALNUM])
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found = ISALNUM(*s);
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else if(charset[CURLFNM_ALPHA])
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found = ISALPHA(*s);
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else if(charset[CURLFNM_DIGIT])
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found = ISDIGIT(*s);
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else if(charset[CURLFNM_XDIGIT])
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found = ISXDIGIT(*s);
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else if(charset[CURLFNM_PRINT])
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found = ISPRINT(*s);
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else if(charset[CURLFNM_SPACE])
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found = ISSPACE(*s);
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else if(charset[CURLFNM_UPPER])
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found = ISUPPER(*s);
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else if(charset[CURLFNM_LOWER])
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found = ISLOWER(*s);
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else if(charset[CURLFNM_BLANK])
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found = ISBLANK(*s);
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else if(charset[CURLFNM_GRAPH])
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found = ISGRAPH(*s);
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if(charset[CURLFNM_NEGATE])
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found = !found;
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if(!found)
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return CURL_FNMATCH_NOMATCH;
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p = pp + 1;
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s++;
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break;
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}
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/* Syntax error in set; mismatch! */
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return CURL_FNMATCH_NOMATCH;
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default:
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if(*p++ != *s++)
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return CURL_FNMATCH_NOMATCH;
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break;
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}
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}
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}
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/*
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* @unittest: 1307
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*/
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int Curl_fnmatch(void *ptr, const char *pattern, const char *string)
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{
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(void)ptr; /* the argument is specified by the curl_fnmatch_callback
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prototype, but not used by Curl_fnmatch() */
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if(!pattern || !string) {
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return CURL_FNMATCH_FAIL;
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}
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return loop((unsigned char *)pattern, (unsigned char *)string, 2);
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}
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#else
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#include <fnmatch.h>
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/*
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* @unittest: 1307
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*/
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int Curl_fnmatch(void *ptr, const char *pattern, const char *string)
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{
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int rc;
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(void)ptr; /* the argument is specified by the curl_fnmatch_callback
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prototype, but not used by Curl_fnmatch() */
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if(!pattern || !string) {
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return CURL_FNMATCH_FAIL;
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}
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rc = fnmatch(pattern, string, 0);
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switch(rc) {
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case 0:
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return CURL_FNMATCH_MATCH;
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case FNM_NOMATCH:
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return CURL_FNMATCH_NOMATCH;
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default:
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return CURL_FNMATCH_FAIL;
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}
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/* not reached */
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}
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#endif
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#endif /* if FTP is disabled */
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