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| version 1.24, 2001/03/28 13:21:30 | version 1.50, 2001/05/19 19:10:20 |
|---|---|
| Line 8 | Line 8 |
| $Id$ | $Id$ |
| */ | */ |
| #include "pa_config_includes.h" | |
| #include "pa_pool.h" | #include "pa_pool.h" |
| #include "pa_string.h" | #include "pa_string.h" |
| #include "pa_hash.h" | #include "pa_hash.h" |
| #include "pa_exception.h" | #include "pa_exception.h" |
| #include "pa_table.h" | #include "pa_table.h" |
| #include "pa_globals.h" | |
| #include "pa_sql_connection.h" | |
| #define escape(action) \ | #define escape(action) \ |
| { \ | { \ |
| Line 43 inline bool need_file_encode(unsigned ch | Line 43 inline bool need_file_encode(unsigned ch |
| if((c>='0') &&(c<='9') ||(c>='A') &&(c<='Z') ||(c>='a') &&(c<='z')) | if((c>='0') &&(c<='9') ||(c>='A') &&(c<='Z') ||(c>='a') &&(c<='z')) |
| return false; | return false; |
| return !strchr("./", c); | return !strchr( |
| #ifdef WIN32 | |
| ":\\~" | |
| #endif | |
| "./()_-", c); | |
| } | } |
| inline bool need_uri_encode(unsigned char c){ | inline bool need_uri_encode(unsigned char c){ |
| if((c>='0') &&(c<='9') ||(c>='A') &&(c<='Z') ||(c>='a') &&(c<='z')) | if((c>='0') &&(c<='9') ||(c>='A') &&(c<='Z') ||(c>='a') &&(c<='z')) |
| Line 51 inline bool need_uri_encode(unsigned cha | Line 55 inline bool need_uri_encode(unsigned cha |
| return !strchr("_-./", c); | return !strchr("_-./", c); |
| } | } |
| inline bool need_header_encode(unsigned char c){ | inline bool need_http_header_encode(unsigned char c){ |
| if(strchr(" , :", c)) | if(strchr(" , :", c)) |
| return false; | return false; |
| Line 65 static bool typo_present(Array::Item *va | Line 69 static bool typo_present(Array::Item *va |
| const char *src=static_cast<const char *>(info); | const char *src=static_cast<const char *>(info); |
| int partial; | int partial; |
| row->get_string(0)->cmp(src, partial); | row->get_string(0)->cmp(partial, src); |
| return | return |
| partial==0 || // full match | partial==0 || // full match |
| partial==1; // typo left column starts 'src' | partial==1; // typo left column starts 'src' |
| } | } |
| /// @todo @b now: optimize whitespaces for all but 'html' | /* |
| char *String::store_to(char *dest) const { | |
| HTTP-header = field-name ":" [ field-value ] CRLF | |
| field-name = token | |
| field-value = *( field-content | LWS ) | |
| field-content = <the OCTETs making up the field-value | |
| and consisting of either *TEXT or combinations | |
| of token, tspecials, and quoted-string> | |
| word = token | quoted-string | |
| token = 1*<any CHAR except CTLs or tspecials> | |
| tspecials = "(" | ")" | "<" | ">" | "@" | |
| | "," | ";" | ":" | "\" | <"> | |
| | "/" | "[" | "]" | "?" | "=" | |
| | "{" | "}" | SP | HT | |
| SP = <US-ASCII SP, space (32)> | |
| HT = <US-ASCII HT, horizontal-tab (9)> | |
| LWS = [CRLF] 1*( SP | HT ) | |
| TEXT = <any OCTET except CTLs, | |
| but including LWS> | |
| quoted-pair = "\" CHAR | |
| if(strchr("()<>@,;:\\\"/[]?={} \t", *ptr)) | |
| */ | |
| inline bool need_quote_http_header(const char *ptr, size_t size) { | |
| for(; size--; ptr++) | |
| if(strchr(";\\\"= \t" /* excluded ()<>@, :/ ? []{} */, *ptr)) | |
| return true; | |
| return false; | |
| } | |
| /** | |
| @todo fix theoretical \n mem overrun in TYPO replacements | |
| */ | |
| char *String::store_to(char *dest, Untaint_lang lang, | |
| SQL_Connection *connection, | |
| const char *charset) const { | |
| // $MAIN:html-typo table | // $MAIN:html-typo table |
| Table *user_typo_table=static_cast<Table *>(pool().tag()); | Table *user_typo_table=static_cast<Table *>(pool().tag()); |
| Table *typo_table=user_typo_table?user_typo_table:default_typo_table; | Table *typo_table=user_typo_table?user_typo_table:default_typo_table; |
| bool whitespace=true; | |
| const Chunk *chunk=&head; | const Chunk *chunk=&head; |
| do { | do { |
| const Chunk::Row *row=chunk->rows; | const Chunk::Row *row=chunk->rows; |
| for(int i=0; i<chunk->count; i++) { | for(size_t i=0; i<chunk->count; i++, row++) { |
| if(row==append_here) | if(row==append_here) |
| goto break2; | goto break2; |
| // WARNING: | // WARNING: |
| // string can grow only UNTAINT_TIMES_BIGGER | // string can grow only UNTAINT_TIMES_BIGGER |
| switch(row->item.lang) { | switch(lang==UL_UNSPECIFIED?row->item.lang:lang) { |
| case UL_NO: | case UL_CLEAN: |
| // clean piece | // clean piece |
| case UL_YES: | { // optimizing whitespace |
| const char *src=row->item.ptr; | |
| for(int size=row->item.size; size--; src++) | |
| switch(*src) { | |
| case ' ': case '\n': case '\r': case '\t': | |
| if(!whitespace) { | |
| *dest++=*src; | |
| whitespace=true; | |
| } | |
| break; | |
| default: | |
| whitespace=false; | |
| *dest++=*src; | |
| break; | |
| } | |
| } | |
| break; | |
| case UL_TAINTED: | |
| // tainted piece, but undefined untaint language | // tainted piece, but undefined untaint language |
| // for VString.as_double of tainted values | // for VString.as_double of tainted values |
| // for ^process{body} evaluation | // for ^process{body} evaluation |
| Line 102 char *String::store_to(char *dest) const | Line 170 char *String::store_to(char *dest) const |
| // tainted, untaint language: file [name] | // tainted, untaint language: file [name] |
| escape(switch(*src) { | escape(switch(*src) { |
| case ' ': to_char('_'); break; | case ' ': to_char('_'); break; |
| encode(need_file_encode, '-'); | encode(need_file_encode, '+'); |
| }); | }); |
| break; | break; |
| case UL_URI: | case UL_URI: |
| Line 112 char *String::store_to(char *dest) const | Line 180 char *String::store_to(char *dest) const |
| encode(need_uri_encode, '%'); | encode(need_uri_encode, '%'); |
| }); | }); |
| break; | break; |
| case UL_HEADER: | case UL_HTTP_HEADER: |
| // tainted, untaint language: header | // tainted, untaint language: http-header |
| escape(switch(*src) { | if(need_quote_http_header(row->item.ptr, row->item.size)) { |
| encode(need_header_encode, '%'); | *dest++='\"'; |
| }); | escape(switch(*src) { |
| case '\"': to_string("\\\"", 2); break; | |
| _default; | |
| }); | |
| *dest++='\"'; | |
| } else { | |
| memcpy(dest, row->item.ptr, row->item.size); | |
| dest+=row->item.size; | |
| } | |
| break; | |
| case UL_MAIL_HEADER: | |
| // tainted, untaint language: mail-header | |
| if(charset) { | |
| // Subject: Re: parser3: =?koi8-r?Q?=D3=C5=CD=C9=CE=C1=D2?= | |
| const char *src=row->item.ptr; | |
| bool to_base_64=false; | |
| for(int size=row->item.size; size--; src++) { | |
| if(*src & 0x80) { | |
| if(!to_base_64) { | |
| dest+=sprintf(dest, "=?%.15s?Q?", charset); | |
| to_base_64=true; | |
| } | |
| dest+=sprintf(dest, "=%02X", *src & 0xFF); | |
| } else { | |
| *dest++=*src; | |
| } | |
| } | |
| if(to_base_64) // close | |
| dest+=sprintf(dest, "?="); | |
| } else { | |
| memcpy(dest, row->item.ptr, row->item.size); | |
| dest+=row->item.size; | |
| } | |
| break; | break; |
| case UL_TABLE: | case UL_TABLE: |
| // tainted, untaint language: table | // tainted, untaint language: table |
| Line 128 char *String::store_to(char *dest) const | Line 228 char *String::store_to(char *dest) const |
| break; | break; |
| case UL_SQL: | case UL_SQL: |
| // tainted, untaint language: sql | // tainted, untaint language: sql |
| // TODO: зависимость от sql сервера | if(connection) |
| memset(dest, '?', row->item.size); | dest+=connection->quote(dest, row->item.ptr, row->item.size); |
| dest+=row->item.size; | else |
| THROW(0, 0, | |
| this, | |
| "untaint in SQL language failed - no connection specified"); | |
| break; | break; |
| case UL_JS: | case UL_JS: |
| escape(switch(*src) { | escape(switch(*src) { |
| Line 152 char *String::store_to(char *dest) const | Line 255 char *String::store_to(char *dest) const |
| _default; | _default; |
| }); | }); |
| break; | break; |
| case UL_HTML_TYPO: { | case UL_USER_HTML: { |
| // tainted, untaint language: html-typo | // tainted, untaint language: html-typo |
| char *html_for_typo=(char *)malloc(size()*2/* '\n' -> '\' 'n' */+1); | char *html_for_typo= |
| (char *)malloc(row->item.size*2/* '\n' -> '\' 'n' */+1); | |
| // note: | // note: |
| // there still is a possibility that user | // there still is a possibility that user |
| // would not replace \n as she supposed to | // would not replace \n as she supposed to |
| // and rather replace \ and n into huge strings | // and rather replace \ and n into huge strings |
| // thus causing memory overrun | // thus causing memory overrun |
| // this can be dealed by allocating *2 memory, but that's too expensive | // this can be dealed by allocating *2 memory, but that's too expensive |
| // todo parser4: fix that | |
| size_t html_for_typo_size; | size_t html_for_typo_size; |
| { // local dest | { // local dest |
| char *dest=html_for_typo; | char *dest=html_for_typo; |
| Line 208 char *String::store_to(char *dest) const | Line 311 char *String::store_to(char *dest) const |
| &b, | &b, |
| "is %g times longer then '%s', " | "is %g times longer then '%s', " |
| "while maximum, handled by Parser, is %d", | "while maximum, handled by Parser, is %d", |
| ((double)b.size())/a.size(), | ((double)b.size())/a.size(), |
| a.cstr(), | a.cstr(), |
| UNTAINT_TIMES_BIGGER); | UNTAINT_TIMES_BIGGER); |
| } | } |
| // skip 'a' in 'src' | // skip 'a' in 'src' |
| Line 228 char *String::store_to(char *dest) const | Line 331 char *String::store_to(char *dest) const |
| this, | this, |
| "unknown untaint language #%d of %d piece", | "unknown untaint language #%d of %d piece", |
| static_cast<int>(row->item.lang), | static_cast<int>(row->item.lang), |
| i); | i); // never |
| break; // never | |
| } | } |
| row++; | |
| if((lang==UL_UNSPECIFIED?row->item.lang:lang)!=UL_CLEAN) | |
| whitespace=false; | |
| } | } |
| chunk=row->link; | chunk=row->link; |
| } while(chunk); | } while(chunk); |