| /*************************************************************************** |
| * _ _ ____ _ |
| * Project ___| | | | _ \| | |
| * / __| | | | |_) | | |
| * | (__| |_| | _ <| |___ |
| * \___|\___/|_| \_\_____| |
| * |
| * Copyright (C) 1998 - 2020, Daniel Stenberg, <[email protected]>, 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. |
| * |
| ***************************************************************************/ |
| |
| #include "curl_setup.h" |
| #ifndef CURL_DISABLE_FTP |
| #include <curl/curl.h> |
| |
| #include "curl_fnmatch.h" |
| #include "curl_memory.h" |
| |
| /* The last #include file should be: */ |
| #include "memdebug.h" |
| |
| #ifndef HAVE_FNMATCH |
| |
| #define CURLFNM_CHARSET_LEN (sizeof(char) * 256) |
| #define CURLFNM_CHSET_SIZE (CURLFNM_CHARSET_LEN + 15) |
| |
| #define CURLFNM_NEGATE CURLFNM_CHARSET_LEN |
| |
| #define CURLFNM_ALNUM (CURLFNM_CHARSET_LEN + 1) |
| #define CURLFNM_DIGIT (CURLFNM_CHARSET_LEN + 2) |
| #define CURLFNM_XDIGIT (CURLFNM_CHARSET_LEN + 3) |
| #define CURLFNM_ALPHA (CURLFNM_CHARSET_LEN + 4) |
| #define CURLFNM_PRINT (CURLFNM_CHARSET_LEN + 5) |
| #define CURLFNM_BLANK (CURLFNM_CHARSET_LEN + 6) |
| #define CURLFNM_LOWER (CURLFNM_CHARSET_LEN + 7) |
| #define CURLFNM_GRAPH (CURLFNM_CHARSET_LEN + 8) |
| #define CURLFNM_SPACE (CURLFNM_CHARSET_LEN + 9) |
| #define CURLFNM_UPPER (CURLFNM_CHARSET_LEN + 10) |
| |
| typedef enum { |
| CURLFNM_SCHS_DEFAULT = 0, |
| CURLFNM_SCHS_RIGHTBR, |
| CURLFNM_SCHS_RIGHTBRLEFTBR |
| } setcharset_state; |
| |
| typedef enum { |
| CURLFNM_PKW_INIT = 0, |
| CURLFNM_PKW_DDOT |
| } parsekey_state; |
| |
| typedef enum { |
| CCLASS_OTHER = 0, |
| CCLASS_DIGIT, |
| CCLASS_UPPER, |
| CCLASS_LOWER |
| } char_class; |
| |
| #define SETCHARSET_OK 1 |
| #define SETCHARSET_FAIL 0 |
| |
| static int parsekeyword(unsigned char **pattern, unsigned char *charset) |
| { |
| parsekey_state state = CURLFNM_PKW_INIT; |
| #define KEYLEN 10 |
| char keyword[KEYLEN] = { 0 }; |
| int found = FALSE; |
| int i; |
| unsigned char *p = *pattern; |
| for(i = 0; !found; i++) { |
| char c = *p++; |
| if(i >= KEYLEN) |
| return SETCHARSET_FAIL; |
| switch(state) { |
| case CURLFNM_PKW_INIT: |
| if(ISLOWER(c)) |
| keyword[i] = c; |
| else if(c == ':') |
| state = CURLFNM_PKW_DDOT; |
| else |
| return SETCHARSET_FAIL; |
| break; |
| case CURLFNM_PKW_DDOT: |
| if(c == ']') |
| found = TRUE; |
| else |
| return SETCHARSET_FAIL; |
| } |
| } |
| #undef KEYLEN |
| |
| *pattern = p; /* move caller's pattern pointer */ |
| if(strcmp(keyword, "digit") == 0) |
| charset[CURLFNM_DIGIT] = 1; |
| else if(strcmp(keyword, "alnum") == 0) |
| charset[CURLFNM_ALNUM] = 1; |
| else if(strcmp(keyword, "alpha") == 0) |
| charset[CURLFNM_ALPHA] = 1; |
| else if(strcmp(keyword, "xdigit") == 0) |
| charset[CURLFNM_XDIGIT] = 1; |
| else if(strcmp(keyword, "print") == 0) |
| charset[CURLFNM_PRINT] = 1; |
| else if(strcmp(keyword, "graph") == 0) |
| charset[CURLFNM_GRAPH] = 1; |
| else if(strcmp(keyword, "space") == 0) |
| charset[CURLFNM_SPACE] = 1; |
| else if(strcmp(keyword, "blank") == 0) |
| charset[CURLFNM_BLANK] = 1; |
| else if(strcmp(keyword, "upper") == 0) |
| charset[CURLFNM_UPPER] = 1; |
| else if(strcmp(keyword, "lower") == 0) |
| charset[CURLFNM_LOWER] = 1; |
| else |
| return SETCHARSET_FAIL; |
| return SETCHARSET_OK; |
| } |
| |
| /* Return the character class. */ |
| static char_class charclass(unsigned char c) |
| { |
| if(ISUPPER(c)) |
| return CCLASS_UPPER; |
| if(ISLOWER(c)) |
| return CCLASS_LOWER; |
| if(ISDIGIT(c)) |
| return CCLASS_DIGIT; |
| return CCLASS_OTHER; |
| } |
| |
| /* Include a character or a range in set. */ |
| static void setcharorrange(unsigned char **pp, unsigned char *charset) |
| { |
| unsigned char *p = (*pp)++; |
| unsigned char c = *p++; |
| |
| charset[c] = 1; |
| if(ISALNUM(c) && *p++ == '-') { |
| char_class cc = charclass(c); |
| unsigned char endrange = *p++; |
| |
| if(endrange == '\\') |
| endrange = *p++; |
| if(endrange >= c && charclass(endrange) == cc) { |
| while(c++ != endrange) |
| if(charclass(c) == cc) /* Chars in class may be not consecutive. */ |
| charset[c] = 1; |
| *pp = p; |
| } |
| } |
| } |
| |
| /* returns 1 (true) if pattern is OK, 0 if is bad ("p" is pattern pointer) */ |
| static int setcharset(unsigned char **p, unsigned char *charset) |
| { |
| setcharset_state state = CURLFNM_SCHS_DEFAULT; |
| bool something_found = FALSE; |
| unsigned char c; |
| |
| memset(charset, 0, CURLFNM_CHSET_SIZE); |
| for(;;) { |
| c = **p; |
| if(!c) |
| return SETCHARSET_FAIL; |
| |
| switch(state) { |
| case CURLFNM_SCHS_DEFAULT: |
| if(c == ']') { |
| if(something_found) |
| return SETCHARSET_OK; |
| something_found = TRUE; |
| state = CURLFNM_SCHS_RIGHTBR; |
| charset[c] = 1; |
| (*p)++; |
| } |
| else if(c == '[') { |
| unsigned char *pp = *p + 1; |
| |
| if(*pp++ == ':' && parsekeyword(&pp, charset)) |
| *p = pp; |
| else { |
| charset[c] = 1; |
| (*p)++; |
| } |
| something_found = TRUE; |
| } |
| else if(c == '^' || c == '!') { |
| if(!something_found) { |
| if(charset[CURLFNM_NEGATE]) { |
| charset[c] = 1; |
| something_found = TRUE; |
| } |
| else |
| charset[CURLFNM_NEGATE] = 1; /* negate charset */ |
| } |
| else |
| charset[c] = 1; |
| (*p)++; |
| } |
| else if(c == '\\') { |
| c = *(++(*p)); |
| if(c) |
| setcharorrange(p, charset); |
| else |
| charset['\\'] = 1; |
| something_found = TRUE; |
| } |
| else { |
| setcharorrange(p, charset); |
| something_found = TRUE; |
| } |
| break; |
| case CURLFNM_SCHS_RIGHTBR: |
| if(c == '[') { |
| state = CURLFNM_SCHS_RIGHTBRLEFTBR; |
| charset[c] = 1; |
| (*p)++; |
| } |
| else if(c == ']') { |
| return SETCHARSET_OK; |
| } |
| else if(ISPRINT(c)) { |
| charset[c] = 1; |
| (*p)++; |
| state = CURLFNM_SCHS_DEFAULT; |
| } |
| else |
| /* used 'goto fail' instead of 'return SETCHARSET_FAIL' to avoid a |
| * nonsense warning 'statement not reached' at end of the fnc when |
| * compiling on Solaris */ |
| goto fail; |
| break; |
| case CURLFNM_SCHS_RIGHTBRLEFTBR: |
| if(c == ']') |
| return SETCHARSET_OK; |
| state = CURLFNM_SCHS_DEFAULT; |
| charset[c] = 1; |
| (*p)++; |
| break; |
| } |
| } |
| fail: |
| return SETCHARSET_FAIL; |
| } |
| |
| static int loop(const unsigned char *pattern, const unsigned char *string, |
| int maxstars) |
| { |
| unsigned char *p = (unsigned char *)pattern; |
| unsigned char *s = (unsigned char *)string; |
| unsigned char charset[CURLFNM_CHSET_SIZE] = { 0 }; |
| |
| for(;;) { |
| unsigned char *pp; |
| |
| switch(*p) { |
| case '*': |
| if(!maxstars) |
| return CURL_FNMATCH_NOMATCH; |
| /* Regroup consecutive stars and question marks. This can be done because |
| '*?*?*' can be expressed as '??*'. */ |
| for(;;) { |
| if(*++p == '\0') |
| return CURL_FNMATCH_MATCH; |
| if(*p == '?') { |
| if(!*s++) |
| return CURL_FNMATCH_NOMATCH; |
| } |
| else if(*p != '*') |
| break; |
| } |
| /* Skip string characters until we find a match with pattern suffix. */ |
| for(maxstars--; *s; s++) { |
| if(loop(p, s, maxstars) == CURL_FNMATCH_MATCH) |
| return CURL_FNMATCH_MATCH; |
| } |
| return CURL_FNMATCH_NOMATCH; |
| case '?': |
| if(!*s) |
| return CURL_FNMATCH_NOMATCH; |
| s++; |
| p++; |
| break; |
| case '\0': |
| return *s? CURL_FNMATCH_NOMATCH: CURL_FNMATCH_MATCH; |
| case '\\': |
| if(p[1]) |
| p++; |
| if(*s++ != *p++) |
| return CURL_FNMATCH_NOMATCH; |
| break; |
| case '[': |
| pp = p + 1; /* Copy in case of syntax error in set. */ |
| if(setcharset(&pp, charset)) { |
| int found = FALSE; |
| if(!*s) |
| return CURL_FNMATCH_NOMATCH; |
| if(charset[(unsigned int)*s]) |
| found = TRUE; |
| else if(charset[CURLFNM_ALNUM]) |
| found = ISALNUM(*s); |
| else if(charset[CURLFNM_ALPHA]) |
| found = ISALPHA(*s); |
| else if(charset[CURLFNM_DIGIT]) |
| found = ISDIGIT(*s); |
| else if(charset[CURLFNM_XDIGIT]) |
| found = ISXDIGIT(*s); |
| else if(charset[CURLFNM_PRINT]) |
| found = ISPRINT(*s); |
| else if(charset[CURLFNM_SPACE]) |
| found = ISSPACE(*s); |
| else if(charset[CURLFNM_UPPER]) |
| found = ISUPPER(*s); |
| else if(charset[CURLFNM_LOWER]) |
| found = ISLOWER(*s); |
| else if(charset[CURLFNM_BLANK]) |
| found = ISBLANK(*s); |
| else if(charset[CURLFNM_GRAPH]) |
| found = ISGRAPH(*s); |
| |
| if(charset[CURLFNM_NEGATE]) |
| found = !found; |
| |
| if(!found) |
| return CURL_FNMATCH_NOMATCH; |
| p = pp + 1; |
| s++; |
| break; |
| } |
| /* Syntax error in set; mismatch! */ |
| return CURL_FNMATCH_NOMATCH; |
| |
| default: |
| if(*p++ != *s++) |
| return CURL_FNMATCH_NOMATCH; |
| break; |
| } |
| } |
| } |
| |
| /* |
| * @unittest: 1307 |
| */ |
| int Curl_fnmatch(void *ptr, const char *pattern, const char *string) |
| { |
| (void)ptr; /* the argument is specified by the curl_fnmatch_callback |
| prototype, but not used by Curl_fnmatch() */ |
| if(!pattern || !string) { |
| return CURL_FNMATCH_FAIL; |
| } |
| return loop((unsigned char *)pattern, (unsigned char *)string, 2); |
| } |
| #else |
| #include <fnmatch.h> |
| /* |
| * @unittest: 1307 |
| */ |
| int Curl_fnmatch(void *ptr, const char *pattern, const char *string) |
| { |
| int rc; |
| (void)ptr; /* the argument is specified by the curl_fnmatch_callback |
| prototype, but not used by Curl_fnmatch() */ |
| if(!pattern || !string) { |
| return CURL_FNMATCH_FAIL; |
| } |
| rc = fnmatch(pattern, string, 0); |
| switch(rc) { |
| case 0: |
| return CURL_FNMATCH_MATCH; |
| case FNM_NOMATCH: |
| return CURL_FNMATCH_NOMATCH; |
| default: |
| return CURL_FNMATCH_FAIL; |
| } |
| /* not reached */ |
| } |
| |
| #endif |
| |
| #endif /* if FTP is disabled */ |
