Annotation of parser3/src/main/untaint.C, revision 1.152
1.7 paf 1: /** @file
1.8 paf 2: Parser: String class part: untaint mechanizm.
3:
1.135 paf 4: Copyright(c) 2001-2005 ArtLebedev Group (http://www.artlebedev.com)
1.89 paf 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.103 paf 6: */
1.8 paf 7:
1.152 ! misha 8: static const char * const IDENT_UNTAINT_C="$Date: 2009-08-21 08:38:55 $";
1.117 paf 9:
1.1 paf 10:
11: #include "pa_string.h"
12: #include "pa_hash.h"
13: #include "pa_exception.h"
1.13 paf 14: #include "pa_table.h"
1.32 paf 15: #include "pa_globals.h"
1.58 parser 16: #include "pa_dictionary.h"
1.66 parser 17: #include "pa_common.h"
1.85 paf 18: #include "pa_charset.h"
1.117 paf 19: #include "pa_request_charsets.h"
20: #include "pa_sapi.h"
1.1 paf 21:
1.117 paf 22: extern "C" { // author forgot to do that
23: #include "ec.h"
24: }
1.91 paf 25:
1.117 paf 26: #include "pa_sql_connection.h"
1.91 paf 27:
1.117 paf 28: // defines
29:
30: #undef CORD_ec_append
31: // redefining to intercept flushes and implement whitespace optimization
32: // of all consequent white space chars leaving only first one
33: #define CORD_ec_append(x, c) \
34: { \
35: bool skip=false; \
36: if(optimize) switch(c) { \
1.131 paf 37: case ' ': case '\n': case '\t': \
1.117 paf 38: if(whitespace) \
39: skip=true; /*skipping subsequent*/ \
40: else \
41: whitespace=true; \
42: break; \
43: default: \
44: whitespace=false; \
45: break; \
46: } \
47: if(!skip) { \
48: if ((x)[0].ec_bufptr == (x)[0].ec_buf + CORD_BUFSZ) { \
49: CORD_ec_flush_buf(x); \
50: } \
51: *((x)[0].ec_bufptr)++ = (c); \
52: } \
53: }
54:
55:
1.140 misha 56: #define escape_fragment(action) \
1.119 paf 57: for(; fragment_length--; CORD_next(info->pos)) { \
58: char c=CORD_pos_fetch(info->pos); \
1.117 paf 59: action \
1.1 paf 60: }
1.133 paf 61: #define _default CORD_ec_append(info->result, c)
1.117 paf 62: #define encode(need_encode_func, prefix, otherwise) \
63: if(need_encode_func(c)) { \
64: static const char* hex="0123456789ABCDEF"; \
1.119 paf 65: CORD_ec_append(info->result, prefix); \
66: CORD_ec_append(info->result, hex[((unsigned char)c)/0x10]); \
67: CORD_ec_append(info->result, hex[((unsigned char)c)%0x10]); \
1.117 paf 68: } else \
1.119 paf 69: CORD_ec_append(info->result, otherwise);
1.126 paf 70: #define to_char(c) { CORD_ec_append(info->result, c); whitespace=false; }
71: #define to_string(s) { CORD_ec_append_cord(info->result, s); whitespace=false; }
1.4 paf 72:
1.9 paf 73: inline bool need_file_encode(unsigned char c){
1.108 paf 74: // russian letters and space ENABLED
75: // encoding only these...
76: return strchr(
1.143 misha 77: "*?'\"<>|"
1.108 paf 78: #ifndef WIN32
1.143 misha 79: ":\\"
1.31 paf 80: #endif
1.143 misha 81: , c)!=0;
1.9 paf 82: }
1.143 misha 83:
1.5 paf 84: inline bool need_uri_encode(unsigned char c){
1.152 ! misha 85: if((c>='0') && (c<='9') || (c>='A') && (c<='Z') || (c>='a') && (c<='z'))
1.4 paf 86: return false;
87:
1.143 misha 88: return !strchr("_-./", c);
1.5 paf 89: }
1.143 misha 90:
1.36 paf 91: inline bool need_http_header_encode(unsigned char c){
1.143 misha 92: if(strchr(" , :", c))
1.5 paf 93: return false;
94:
95: return need_uri_encode(c);
1.4 paf 96: }
1.143 misha 97:
1.136 paf 98: inline bool need_regex_escape(unsigned char c){
1.142 misha 99: return strchr("\\^$.[]|()?*+{}-", c)!=0;
1.136 paf 100: }
1.1 paf 101:
1.150 misha 102: inline bool need_parser_code_escape(unsigned char c){
103: return strchr("^$;@()[]{}:#\"", c)!=0;
104: }
105:
1.1 paf 106: // String
107:
1.41 paf 108: /*
109: HTTP-header = field-name ":" [ field-value ] CRLF
110:
1.152 ! misha 111: field-name = token
! 112: field-value = *( field-content | LWS )
1.41 paf 113:
1.152 ! misha 114: field-content = <the OCTETs making up the field-value
1.41 paf 115: and consisting of either *TEXT or combinations
116: of token, tspecials, and quoted-string>
117:
118:
1.152 ! misha 119: token = 1*<any CHAR except CTLs or tspecials>
1.41 paf 120: word = token | quoted-string
1.152 ! misha 121: quoted-string = ( <"> *(qdtext | quoted-pair ) <"> )
! 122: qdtext = <any TEXT except <">>
! 123: quoted-pair = "\" CHAR
1.41 paf 124:
1.152 ! misha 125: OCTET = <any 8-bit sequence of data>
! 126: CHAR = <any US-ASCII character (octets 0 - 127)>
1.41 paf 127:
128: tspecials = "(" | ")" | "<" | ">" | "@"
1.152 ! misha 129: | "," | ";" | ":" | "\" | <">
! 130: | "/" | "[" | "]" | "?" | "="
! 131: | "{" | "}" | SP | HT
1.41 paf 132:
133: SP = <US-ASCII SP, space (32)>
134: HT = <US-ASCII HT, horizontal-tab (9)>
135:
136: LWS = [CRLF] 1*( SP | HT )
1.152 ! misha 137: TEXT = <any OCTET except CTLs, but including LWS>
! 138: CTL = <any US-ASCII control character (octets 0 - 31) and DEL (127)>
1.41 paf 139:
140:
141: if(strchr("()<>@,;:\\\"/[]?={} \t", *ptr))
142: */
1.117 paf 143: inline bool need_quote_http_header(const char* ptr, size_t size) {
1.41 paf 144: for(; size--; ptr++)
1.42 paf 145: if(strchr(";\\\"= \t" /* excluded ()<>@, :/ ? []{} */, *ptr))
1.41 paf 146: return true;
147: return false;
148: }
149:
1.119 paf 150: #ifndef DOXYGEN
151: struct Append_fragment_info {
152: String::Language lang;
153: String::Languages* dest_languages;
154: size_t dest_body_plan_length;
155: };
156: #endif
157: int append_fragment_optimizing(char alang, size_t asize, Append_fragment_info* info) {
158: const String::Language lang=(String::Language)(unsigned char)alang;
159: // main idea here:
160: // tainted piece would get OPTIMIZED bit from 'lang'
161: // clean piece would be marked OPTIMIZED manually
162: // pieces with determined languages [not tainted|clean] would retain theirs langs
163: info->dest_languages->append(info->dest_body_plan_length,
1.120 paf 164: lang==String::L_TAINTED?
1.119 paf 165: info->lang
1.120 paf 166: :lang==String::L_CLEAN?
167: (String::Language)(String::L_CLEAN|String::L_OPTIMIZE_BIT) // ORing with OPTIMIZED flag
1.119 paf 168: :lang,
169: asize);
170: info->dest_body_plan_length+=asize;
171:
172: return 0; // 0=continue
173: }
174: int append_fragment_nonoptimizing(char alang, size_t asize, Append_fragment_info* info) {
175: const String::Language lang=(String::Language)(unsigned char)alang;
176: // The core idea: tainted pieces got marked with context's lang
177: info->dest_languages->append(info->dest_body_plan_length,
1.120 paf 178: lang==String::L_TAINTED?
1.119 paf 179: info->lang
180: :lang,
181: asize);
182: info->dest_body_plan_length+=asize;
183:
184: return 0; // 0=continue
185: }
1.117 paf 186:
1.91 paf 187: /**
1.117 paf 188: appends to other String,
1.91 paf 189: marking all tainted pieces of it with @a lang.
1.92 paf 190: or marking ALL pieces of it with a @a lang when @a forced to,
191: and propagating OPTIMIZE language bit.
1.117 paf 192: */
1.147 misha 193: String& String::append_to(String& dest, Language ilang, bool forced) const {
1.117 paf 194: if(is_empty())
195: return dest;
1.91 paf 196:
1.119 paf 197: // first: fragment infos
1.117 paf 198:
1.147 misha 199: if(ilang==L_PASS_APPENDED) // without language-change?
200: dest.langs.appendHelper(dest.body, langs, body);
1.117 paf 201: else if(forced) //forcing passed lang?
1.147 misha 202: dest.langs.appendHelper(dest.body, ilang, body);
203: else {
204: if(langs.opt.is_not_just_lang){
205: Append_fragment_info info={ilang, &dest.langs, dest.body.length()};
206: langs.for_each(body, ilang&L_OPTIMIZE_BIT?
207: append_fragment_optimizing
208: :append_fragment_nonoptimizing, &info);
209: } else {
210: Language lang=langs.opt.lang;
211: // see append_fragment_* for explanation
212: if(ilang&L_OPTIMIZE_BIT){
213: dest.langs.appendHelper(dest.body,
214: lang==String::L_TAINTED?
215: ilang
216: :lang==String::L_CLEAN?
217: (String::Language)(String::L_CLEAN|String::L_OPTIMIZE_BIT)
218: :lang,
219: body);
220: } else {
221: dest.langs.appendHelper(dest.body, lang==String::L_TAINTED ? ilang:lang, body);
222: }
223: }
1.91 paf 224: }
225:
1.119 paf 226: // next: letters
227: dest.body<<body;
228:
1.117 paf 229: ASSERT_STRING_INVARIANT(dest);
1.75 paf 230: return dest;
1.51 parser 231: }
232:
1.109 paf 233: /** http://www.ietf.org/rfc/rfc2047.txt
234: RFC
235: (3) As a replacement for a 'word' entity within a 'phrase', for example,
236: one that precedes an address in a From, To, or Cc header. The ABNF
237: definition for 'phrase' from RFC 822 thus becomes:
238:
239: phrase = 1*( encoded-word / word )
240:
241: In this case the set of characters that may be used in a "Q"-encoded
242: 'encoded-word' is restricted to: <upper and lower case ASCII
243: letters, decimal digits, "!", "*", "+", "-", "/", "=", and "_"
244: (underscore, ASCII 95.)>. An 'encoded-word' that appears within a
245: 'phrase' MUST be separated from any adjacent 'word', 'text' or
246: 'special' by 'linear-white-space'.
247: ...
248: (2) The 8-bit hexadecimal value 20 (e.g., ISO-8859-1 SPACE) may be
249: represented as "_" (underscore, ASCII 95.). (This character may
250: not pass through some internetwork mail gateways, but its use
251: will greatly enhance readability of "Q" encoded data with mail
252: readers that do not support this encoding.) Note that the "_"
253: always represents hexadecimal 20, even if the SPACE character
254: occupies a different code position in the character set in use.
255:
256: paf: obviously,
257: without "=", or one could not differ "=E0" and "russian letter a"
258: and without "_", or in would mean 0x20
259: */
1.117 paf 260: inline bool mail_header_char_valid_within_Qencoded(char c) {
1.109 paf 261: return c>='A' && c<='Z'
262: || c>='a' && c<='Z'
263: || c>='0' && c<='9'
264: || strchr("!*+-/", c);
265: }
1.118 paf 266: inline bool addr_spec_soon(const char *src) {
1.124 paf 267: for(char c; (c=*src); src++)
1.118 paf 268: if(c=='<')
269: return true;
270: else if(!(c==' ' || c=='\t'))
271: return false;
272: return false;
273: }
1.117 paf 274: /**
275: RFC
276: Upper case should be used for hexadecimal digits "A" through "F"
277: The 8-bit hexadecimal value 20 (e.g., ISO-8859-1 SPACE)
278: may be represented as "_"
279: */
280: inline bool mail_header_nonspace_char(char c) {
281: return c != 0x20;
282: }
1.125 paf 283:
1.117 paf 284: inline void ec_append(CORD_ec& result, bool& optimize, bool& whitespace, CORD_pos pos, size_t size) {
285: while(size--) {
286: CORD_ec_append(result, CORD_pos_fetch(pos));
287: CORD_next(pos);
288: }
289: }
290: inline void pa_CORD_pos_advance(CORD_pos pos, size_t n) {
291: while(true) {
1.125 paf 292: long avail=CORD_pos_chars_left(pos);
293: if(avail<=0) {
1.117 paf 294: CORD_next(pos);
295: if(!--n)
296: break;
1.125 paf 297: } else if((size_t)avail<n) {
1.117 paf 298: CORD_pos_advance(pos, avail);
299: n-=avail;
300: } else { // avail>=n
301: CORD_pos_advance(pos, n);
302: break;
303: }
304: }
305: }
306:
1.119 paf 307: #ifndef DOXYGEN
308: struct Cstr_to_string_body_block_info {
309: // input
310: String::Language lang;
311: SQL_Connection* connection;
312: const Request_charsets* charsets;
313: const String::Body* body;
314:
315: // output
316: CORD_ec result;
317:
318: // private
319: CORD_pos pos;
320: size_t fragment_begin;
321: bool whitespace;
1.138 misha 322: const char* exception;
1.119 paf 323: };
324: #endif
1.151 misha 325:
326: // @todo: replace info->body->mid with something that uses info->pos
1.148 misha 327: int cstr_to_string_body_block(String::Language to_lang, size_t fragment_length, Cstr_to_string_body_block_info* info) {
1.119 paf 328: bool& whitespace=info->whitespace;
329: size_t fragment_end=info->fragment_begin+fragment_length;
1.148 misha 330: //fprintf(stderr, "%d, %d =%s=\n", to_lang, fragment_length, info->body->cstr());
1.119 paf 331:
1.120 paf 332: bool optimize=(to_lang & String::L_OPTIMIZE_BIT)!=0;
1.119 paf 333: if(!optimize)
334: whitespace=false;
335:
1.120 paf 336: switch(to_lang & ~String::L_OPTIMIZE_BIT) {
337: case String::L_CLEAN:
338: case String::L_TAINTED:
339: case String::L_AS_IS:
1.119 paf 340: // clean piece
341:
342: // tainted piece, but undefined untaint language
343: // for VString.as_double of tainted values
344: // for ^process{body} evaluation
345:
346: // tainted, untaint language: as-is
347: ec_append(info->result, optimize, whitespace, info->pos, fragment_length);
348: break;
1.120 paf 349: case String::L_FILE_SPEC:
1.119 paf 350: // tainted, untaint language: file [name]
1.140 misha 351: {
352: bool is1251=(info->charsets && info->charsets->source().NAME()=="WINDOWS-1251");
353: escape_fragment(
354: // Macintosh has problems with small Russian letter 'r'
355: if( is1251 && c=='\xF0' ) {
356: // fixing that letter for most common charset
357: to_char('p');
358: } else // fallback to default
359: encode(need_file_encode, '_', c);
360: );
361: }
1.119 paf 362: break;
1.144 misha 363: case String::L_FILE_POST:
364: {
365: escape_fragment(switch(c) {
366: case '\0': to_string("\\0"); break;
367: case '\\': to_string("\\\\"); break;
368: default: _default; break;
369: });
370: }
371: break;
1.120 paf 372: case String::L_URI:
373: case String::L_HTTP_HEADER:
1.119 paf 374: // tainted, untaint language: http-field-content-text
1.140 misha 375: escape_fragment(
1.119 paf 376: encode(need_uri_encode, '%', c);
377: );
378: break;
1.120 paf 379: case String::L_MAIL_HEADER:
1.119 paf 380: // tainted, untaint language: mail-header
381: // http://www.ietf.org/rfc/rfc2047.txt
382: if(info->charsets) {
383: size_t mail_size;
384: const char *mail_ptr=
385: info->body->mid(info->fragment_begin, mail_size=fragment_length).cstr();
386: // skip source [we use recoded version]
387: pa_CORD_pos_advance(info->pos, mail_size);
388:
389: const char* charset_name=info->charsets->mail().NAME().cstr();
390:
391: // Subject: Re: parser3: =?koi8-r?Q?=D3=C5=CD=C9=CE=C1=D2?=
392: bool to_quoted_printable=false;
393:
394: bool email=false;
395: uchar c;
1.124 paf 396: for(const char* src=mail_ptr; (c=(uchar)*src++); ) {
1.137 paf 397: if(c=='\r' || c=='\n')
398: c=' ';
1.130 paf 399: if(to_quoted_printable && (c==',' || c == '"' || addr_spec_soon(src-1/*position to 'c'*/))) {
1.119 paf 400: email=c=='<';
401: to_string("?=");
402: to_quoted_printable=false;
403: }
1.130 paf 404: //RFC + An 'encoded-word' MUST NOT appear in any portion of an 'addr-spec'.
1.119 paf 405: if(!email && (
406: !to_quoted_printable && (c & 0x80) // starting quote-printable-encoding on first 8bit char
407: || to_quoted_printable && !mail_header_char_valid_within_Qencoded(c)
408: )) {
409: if(!to_quoted_printable) {
410: to_string("=?");
411: to_string(charset_name);
412: to_string("?Q?");
413: to_quoted_printable=true;
1.105 paf 414: }
1.119 paf 415: encode(mail_header_nonspace_char, '=', '_');
416: } else
417: to_char(c);
418: if(c=='>')
419: email=false;
420: }
421: if(to_quoted_printable) // close
422: to_string("?=");
423:
424: } else
425: ec_append(info->result, optimize, whitespace, info->pos, fragment_length);
426: break;
1.120 paf 427: case String::L_SQL:
1.119 paf 428: // tainted, untaint language: sql
429: if(info->connection) {
430: const char *fragment_str=info->body->mid(info->fragment_begin, fragment_length).cstr();
431: // skip source [we use recoded version]
432: pa_CORD_pos_advance(info->pos, fragment_length);
433:
434: to_string(info->connection->quote(fragment_str, fragment_length));
1.138 misha 435: } else {
436: info->exception="untaint in SQL language failed - no connection specified";
437: info->fragment_begin=fragment_end;
438: return 1; // stop processing. can't throw exception here
439: }
1.119 paf 440: break;
1.120 paf 441: case String::L_JS:
1.140 misha 442: escape_fragment(switch(c) {
443: case '\n': to_string("\\n"); break;
1.119 paf 444: case '"': to_string("\\\""); break;
445: case '\'': to_string("\\'"); break;
446: case '\\': to_string("\\\\"); break;
447: case '\xFF': to_string("\\\xFF"); break;
1.146 misha 448: case '\r': to_string("\\r"); break;
1.133 paf 449: default: _default; break;
1.119 paf 450: });
451: break;
1.120 paf 452: case String::L_XML:
1.133 paf 453: // [2] Char ::= #x9 | #xA | #xD | [#x20-#xD7FF] | [#xE000-#xFFFD] | [#x10000-#x10FFFF]
1.140 misha 454: escape_fragment(switch(c) {
455: case '\x20':
456: case '\x9':
457: case '\xA':
1.133 paf 458: case '\xD': // this is usually removed on input
459: _default;
460: break;
1.119 paf 461: case '&': to_string("&"); break;
462: case '>': to_string(">"); break;
463: case '<': to_string("<"); break;
464: case '"': to_string("""); break;
465: case '\'': to_string("'"); break;
1.133 paf 466: default:
467: if(((unsigned char)c)<0x20) {
468: // fixing it, so that libxml would not result
469: // in fatal error parsing text
470: // though it really violates standard.
471: // to indicate there were an error
472: // replace bad char not to it's code,
473: // which we can do,
474: // but rather to '!' to show that input were actually
475: // invalid.
476: // life: shows that MSIE can somehow garble form values
477: // so that they contain these chars.
478: to_char('!');
479: } else {
480: _default;
481: }
482: break;
1.119 paf 483: });
484: break;
1.120 paf 485: case String::L_HTML:
1.140 misha 486: escape_fragment(switch(c) {
1.119 paf 487: case '&': to_string("&"); break;
488: case '>': to_string(">"); break;
489: case '<': to_string("<"); break;
490: case '"': to_string("""); break;
1.133 paf 491: default: _default; break;
1.119 paf 492: });
493: break;
1.136 paf 494: case String::L_REGEX:
495: // tainted, untaint language: regex
1.140 misha 496: escape_fragment(
1.136 paf 497: if(need_regex_escape(c))
498: to_char('\\')
499: _default;
500: );
501: break;
1.140 misha 502: case String::L_HTTP_COOKIE:
503: // tainted, untaint language: cookie (3.3.0 and higher: %uXXXX in UTF-8)
504: {
505: const char *fragment_str=info->body->mid(info->fragment_begin, fragment_length).cstr();
506: // skip source [we use recoded version]
507: pa_CORD_pos_advance(info->pos, fragment_length);
508: String::C output(fragment_str, fragment_length);
509:
510: output=Charset::escape(output, info->charsets->source());
511: //throw Exception(0, 0, output);
512: to_string(output);
513:
514: }
515: break;
1.150 misha 516: case String::L_PARSER_CODE:
517: // for auto-untaint in process
518: escape_fragment(
519: if(need_parser_code_escape(c))
520: to_char('^');
521: _default;
522: );
523: break;
1.119 paf 524: default:
1.127 paf 525: SAPI::abort("unknown untaint language #%d",
1.119 paf 526: static_cast<int>(to_lang)); // should never
527: break; // never
1.117 paf 528: }
1.55 parser 529:
1.119 paf 530: info->fragment_begin=fragment_end;
531:
532: return 0; // 0=continue
533: }
534:
535:
1.148 misha 536: String::Body String::cstr_to_string_body_taint(Language lang, SQL_Connection* connection, const Request_charsets *charsets) const {
1.134 paf 537: if(is_empty())
538: return String::Body();
1.119 paf 539:
540: Cstr_to_string_body_block_info info;
541: // input
542: info.lang=lang;
543: info.connection=connection;
544: info.charsets=charsets;
545: info.body=&body;
546: // output
547: CORD_ec_init(info.result);
548: // private
549: body.set_pos(info.pos, 0);
550: info.fragment_begin=0;
1.138 misha 551: info.exception=0;
1.119 paf 552: info.whitespace=true;
553:
1.148 misha 554: cstr_to_string_body_block(lang, length(), &info);
555:
556: if(info.exception)
557: throw Exception(0,
558: 0,
559: info.exception);
560:
561: return String::Body(CORD_ec_to_cord(info.result));
562: }
563:
564: int cstr_to_string_body_block_untaint(char alang, size_t fragment_length, Cstr_to_string_body_block_info* info){
565: const String::Language lang=(String::Language)(unsigned char)alang;
566: // see append_fragment_* for explanation
567: if(info->lang&String::L_OPTIMIZE_BIT)
568: return cstr_to_string_body_block(
569: lang==String::L_TAINTED?
570: info->lang
571: :lang==String::L_CLEAN?
572: (String::Language)(String::L_CLEAN|String::L_OPTIMIZE_BIT)
573: :lang,
574: fragment_length, info);
575: else
576: return cstr_to_string_body_block(lang==String::L_TAINTED ? info->lang:lang, fragment_length, info);
577: }
578:
579: String::Body String::cstr_to_string_body_untaint(Language lang, SQL_Connection* connection, const Request_charsets *charsets) const {
580: if(is_empty())
581: return String::Body();
582:
583: Cstr_to_string_body_block_info info;
584: // input
585: info.lang=lang;
586: info.connection=connection;
587: info.charsets=charsets;
588: info.body=&body;
589: // output
590: CORD_ec_init(info.result);
591: // private
592: body.set_pos(info.pos, 0);
593: info.fragment_begin=0;
594: info.exception=0;
595: info.whitespace=true;
596:
597: langs.for_each(body, cstr_to_string_body_block_untaint, &info);
1.151 misha 598:
599: if(info.exception)
600: throw Exception(0,
601: 0,
602: info.exception);
603:
604: return String::Body(CORD_ec_to_cord(info.result));
605: }
606:
607: const char* String::transcode_and_untaint_cstr(Language lang, const Request_charsets *charsets) const {
608: if(charsets && &charsets->source() != &charsets->client()){
609: return cstr_to_string_body_transcode_and_untaint(lang, charsets).cstr();
610: } else {
611: return cstr_to_string_body_untaint(lang, 0, charsets).cstr();
612: }
613: }
614:
615: int cstr_to_string_body_block_transcode_and_untaint(char alang, size_t fragment_length, Cstr_to_string_body_block_info* info){
616: String::C output_c=Charset::transcode(
617: String::C(info->body->mid(info->fragment_begin, fragment_length).cstr(), fragment_length),
618: info->charsets->source(),
619: info->charsets->client()
620: );
621: String::Body output_body=String::Body(output_c);
622:
623: size_t fragment_end=info->fragment_begin+fragment_length;
624: const String::Body* info_body=info->body;
625:
626: info->fragment_begin=0;
627: info->body=&output_body;
628: info->body->set_pos(info->pos, 0);
629:
630: int result=cstr_to_string_body_block_untaint(alang, output_c.length, info);
631:
632: info->fragment_begin=fragment_end;
633: info->body=info_body;
634:
635: return result;
636: }
637:
638: String::Body String::cstr_to_string_body_transcode_and_untaint(Language lang, const Request_charsets *charsets) const {
639: if(is_empty())
640: return String::Body();
641:
642: Cstr_to_string_body_block_info info;
643: // input
644: info.lang=lang;
645: info.connection=0;
646: info.charsets=charsets;
647: info.body=&body;
648: // output
649: CORD_ec_init(info.result);
650: // private
651: body.set_pos(info.pos, 0);
652: info.fragment_begin=0;
653: info.exception=0;
654: info.whitespace=true;
655:
656: langs.for_each(body, cstr_to_string_body_block_transcode_and_untaint, &info);
657:
1.148 misha 658: if(info.exception)
1.138 misha 659: throw Exception(0,
660: 0,
661: info.exception);
662:
1.119 paf 663: return String::Body(CORD_ec_to_cord(info.result));
1.1 paf 664: }
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