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https://github.com/moparisthebest/curl
synced 2024-12-23 08:38:49 -05:00
fnmatch: pattern syntax can no longer fail
Whenever an expected pattern syntax rule cannot be matched, the character starting the rule loses its special meaning and the parsing is resumed: - backslash at the end of pattern string matches itself. - Error in [:keyword:] results in set containing :\[dekorwy. Unit test 1307 updated for this new situation. Closes #2273
This commit is contained in:
Patrick Monnerat
parent
fcaa1826bd
commit
da5f4b1d84
@ -46,11 +46,6 @@
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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_LOOP_DEFAULT = 0,
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CURLFNM_LOOP_BACKSLASH
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} loop_state;
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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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@ -86,12 +81,12 @@ static int parsekeyword(unsigned char **pattern, unsigned char *charset)
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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(ISALPHA(c) && ISLOWER(c))
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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 0;
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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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@ -186,15 +181,10 @@ static int setcharset(unsigned char **p, unsigned char *charset)
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(*p)++;
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}
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else if(c == '[') {
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char c2 = *((*p) + 1);
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if(c2 == ':') { /* there has to be a keyword */
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(*p) += 2;
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if(parsekeyword(p, charset)) {
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state = CURLFNM_SCHS_DEFAULT;
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}
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else
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return SETCHARSET_FAIL;
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}
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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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@ -248,14 +238,11 @@ static int setcharset(unsigned char **p, unsigned char *charset)
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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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if(c == ']')
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return SETCHARSET_OK;
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}
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else {
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state = CURLFNM_SCHS_DEFAULT;
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charset[c] = 1;
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(*p)++;
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}
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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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@ -266,108 +253,88 @@ fail:
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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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loop_state state = CURLFNM_LOOP_DEFAULT;
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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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int rc = 0;
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for(;;) {
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switch(state) {
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case CURLFNM_LOOP_DEFAULT:
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if(*p == '*') {
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if(!maxstars)
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return CURL_FNMATCH_NOMATCH;
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while(*(p + 1) == '*') /* eliminate multiple stars */
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p++;
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if(*s == '\0' && *(p + 1) == '\0')
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return CURL_FNMATCH_MATCH;
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rc = loop(p + 1, s, maxstars - 1); /* *.txt matches .txt <=>
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.txt matches .txt */
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if(rc == CURL_FNMATCH_MATCH)
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return CURL_FNMATCH_MATCH;
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if(*s) /* let the star eat up one character */
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s++;
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else
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return CURL_FNMATCH_NOMATCH;
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}
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else if(*p == '?') {
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if(ISPRINT(*s)) {
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s++;
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p++;
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}
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else if(*s == '\0')
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return CURL_FNMATCH_NOMATCH;
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else
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return CURL_FNMATCH_FAIL; /* cannot deal with other character */
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}
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else if(*p == '\0') {
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if(*s == '\0')
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return CURL_FNMATCH_MATCH;
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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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}
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else if(*p == '\\') {
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state = CURLFNM_LOOP_BACKSLASH;
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while(p[1] == '*') /* eliminate multiple stars */
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p++;
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}
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else if(*p == '[') {
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unsigned char *pp = p + 1; /* cannot handle with pointer to register */
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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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p = pp + 1;
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s++;
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}
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else
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return CURL_FNMATCH_NOMATCH;
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}
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else {
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if(*p++ != *s++)
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return CURL_FNMATCH_NOMATCH;
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}
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}
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else {
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if(*p++ != *s++)
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return CURL_FNMATCH_NOMATCH;
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}
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if(*s == '\0' && p[1] == '\0')
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return CURL_FNMATCH_MATCH;
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rc = loop(p + 1, s, maxstars - 1); /* *.txt matches .txt <=>
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.txt matches .txt */
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if(rc == CURL_FNMATCH_MATCH)
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return CURL_FNMATCH_MATCH;
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if(!*s)
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return CURL_FNMATCH_NOMATCH;
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s++; /* let the star eat up one character */
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break;
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case CURLFNM_LOOP_BACKSLASH:
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if(ISPRINT(*p)) {
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if(*p++ == *s++)
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state = CURLFNM_LOOP_DEFAULT;
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else
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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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else
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return CURL_FNMATCH_FAIL;
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/* Syntax error in set: this must be taken as a regular character. */
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/* FALLTHROUGH */
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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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@ -25,7 +25,6 @@
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#define MATCH CURL_FNMATCH_MATCH
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#define NOMATCH CURL_FNMATCH_NOMATCH
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#define RE_ERR CURL_FNMATCH_FAIL
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struct testcase {
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const char *pattern;
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@ -135,6 +134,8 @@ static const struct testcase tests[] = {
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{ "[^[:blank:]]", "\t", NOMATCH },
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{ "[^[:print:]]", "\10", MATCH },
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{ "[[:lower:]][[:lower:]]", "ll", MATCH },
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{ "[[:foo:]]", "bar", NOMATCH },
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{ "[[:foo:]]", "f]", MATCH },
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{ "Curl[[:blank:]];-)", "Curl ;-)", MATCH },
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{ "*[[:blank:]]*", " ", MATCH },
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@ -172,7 +173,7 @@ static const struct testcase tests[] = {
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{ "x", "", NOMATCH },
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/* backslash */
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{ "\\", "\\", RE_ERR },
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{ "\\", "\\", MATCH },
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{ "\\\\", "\\", MATCH },
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{ "\\\\", "\\\\", NOMATCH },
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{ "\\?", "?", MATCH },
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