--- parser3/src/classes/math.C 2006/11/13 13:46:17 1.43 +++ parser3/src/classes/math.C 2015/10/12 21:04:58 1.79 @@ -1,37 +1,29 @@ /** @file Parser: @b math parser class. - Copyright(c) 2001-2005 ArtLebedev Group(http://www.artlebedev.com) + Copyright (c) 2001-2012 Art. Lebedev Studio (http://www.artlebedev.com) Author: Alexandr Petrosian (http://paf.design.ru) portions from gen_uuid.c, Copyright (C) 1996, 1997, 1998, 1999 Theodore Ts'o. */ -static const char * const IDENT_MATH_C="$Date: 2006/11/13 13:46:17 $"; - #include "pa_vmethod_frame.h" #include "pa_common.h" #include "pa_vint.h" #include "pa_vmath.h" +#include "pa_vfile.h" #include "pa_request.h" #include "pa_md5.h" -#include "pa_threads.h" - -#ifdef WIN32 -# define _WIN32_WINNT 0x400 -# include -# include -#endif +#include "pa_sha2.h" +#include "pa_random.h" #ifdef HAVE_CRYPT -# ifdef HAVE_CRYPT_H -# include -# endif -#else - extern char *crypt(const char* , const char* ); +extern "C" char *crypt(const char* , const char* ); #endif +volatile const char * IDENT_MATH_C="$Id: math.C,v 1.79 2015/10/12 21:04:58 moko Exp $"; + // defines #define MAX_SALT 8 @@ -50,123 +42,12 @@ public: // Methoded DECLARE_CLASS_VAR(math, 0 /*fictive*/, new MMath); -#ifdef WIN32 -class Random_provider { - HCRYPTPROV fhProv; - - void acquire() { - SYNCHRONIZED; - - if(fhProv) - return; - - if(!CryptAcquireContext(&fhProv, NULL, NULL, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT)) - throw Exception(0, - 0, - "CryptAcquireContext failed"); - } - void release() { - if(fhProv) - CryptReleaseContext(fhProv, 0); - } - -public: - Random_provider(): fhProv(0) {} - ~Random_provider() { release(); } - void generate(void *buffer, size_t size) { - acquire(); - - if(!CryptGenRandom(fhProv, size, (BYTE*)buffer)) - throw Exception(0, - 0, - "CryptGenRandom failed"); - } -} - random_provider; - -#else - -/// from gen_uuid.c -static int get_random_fd(void) -{ - struct timeval tv; - static int fd = -2; - int i; - - if (fd == -2) { - gettimeofday(&tv, 0); - fd = open("/dev/urandom", O_RDONLY); - if (fd == -1) - fd = open("/dev/random", O_RDONLY | O_NONBLOCK); - srand((getpid() << 16) ^ getuid() ^ tv.tv_sec ^ tv.tv_usec); - } - /* Crank the random number generator a few times */ - gettimeofday(&tv, 0); - for (i = (tv.tv_sec ^ tv.tv_usec) & 0x1F; i > 0; i--) - rand(); - return fd; -} - - -/* - * Generate a series of random bytes. Use /dev/urandom if possible, - * and if not, use srandom/random. - */ -static void get_random_bytes(void *buf, int nbytes) -{ - int i, fd = get_random_fd(); - int lose_counter = 0; - char *cp = (char *) buf; - - if (fd >= 0) { - while (nbytes > 0) { - i = read(fd, cp, nbytes); - if (i <= 0) { - if (lose_counter++ > 16) - break; - continue; - } - nbytes -= i; - cp += i; - lose_counter = 0; - } - } - - /* XXX put something better here if no /dev/random! */ - for (i = 0; i < nbytes; i++) - *cp++ = rand() & 0xFF; - return; -} - - -#endif - - -// helpers - -static void random(void *buffer, size_t size) { -#ifdef WIN32 - random_provider.generate(buffer, size); -#else - get_random_bytes(buffer, size); -#endif -} - - // methods -#define MAX_UINT 0xFFFFFFFFu - -static inline int _random(uint top) { - uint raw; - random(&raw, sizeof(raw)); - return int(double(raw) / MAX_UINT * top ); -} - static void _random(Request& r, MethodParams& params) { double top=params.as_double(0, "range must be expression", r); if(top<=0 || top>MAX_UINT) - throw Exception("parser.runtime", + throw Exception(PARSER_RUNTIME, 0, "top(%g) must be [1..%u]", top, MAX_UINT); @@ -189,19 +70,31 @@ static void math1(Request& r, MethodPara static void _##name(Request& r, MethodParams& params) {\ math1(r, params, &name);\ } + #define MATH1P(name_parser, name_c) \ static void _##name_parser(Request& r, MethodParams& params) {\ math1(r, params, &name_c);\ } -MATH1(round); MATH1(floor); MATH1P(ceiling, ceil); -MATH1(trunc); MATH1(frac); -MATH1P(abs, fabs); MATH1(sign); -MATH1(exp); MATH1(log); -MATH1(sin); MATH1(asin); -MATH1(cos); MATH1(acos); -MATH1(tan); MATH1(atan); -MATH1(degrees); MATH1(radians); -MATH1(sqrt); + +MATH1(round) +MATH1(floor) +MATH1P(ceiling, ceil) +MATH1(trunc) +MATH1(frac) +MATH1P(abs, fabs) +MATH1(sign) +MATH1(exp) +MATH1(log) +MATH1(log10) +MATH1(sin) +MATH1(asin) +MATH1(cos) +MATH1(acos) +MATH1(tan) +MATH1(atan) +MATH1(degrees) +MATH1(radians) +MATH1(sqrt) typedef double (*math2_func_ptr)(double, double); @@ -216,11 +109,13 @@ static void math2(Request& r, MethodPara static void _##name(Request& r, MethodParams& params) {\ math2(r, params, &name);\ } -MATH2(pow); -inline bool is_salt_body_char(int c) { - return isalnum(c) || c == '.' || c=='/'; +MATH2(pow) + +inline bool is_salt_body_char(unsigned char c) { + return pa_isalnum(c) || c == '.' || c=='/'; } + static size_t calc_prefix_size(const char* salt) { if(strlen(salt)) { if(!is_salt_body_char((unsigned char)salt[0])) { // $... {... @@ -253,54 +148,36 @@ static void _crypt(Request& r, MethodPar } else normal_salt=maybe_bodyless_salt; - /* FreeBSD style MD5 string - */ - if(strncmp(normal_salt, PA_MD5PW_ID, PA_MD5PW_IDLEN) == 0) { + /* FreeBSD style MD5 string + */ + if(strncmp(normal_salt, PA_MD5PW_ID, PA_MD5PW_IDLEN) == 0) { const size_t sample_size=120; char *sample_buf=new(PointerFreeGC) char[sample_size]; pa_MD5Encode((const unsigned char *)password, (const unsigned char *)normal_salt, sample_buf, sample_size); String sample(sample_buf); r.write_pass_lang(sample); - } else { + } else { #ifdef HAVE_CRYPT const char* static_sample_buf=crypt(password, normal_salt); if(!static_sample_buf // nothing generated || !static_sample_buf[0] // generated nothing || strncmp(static_sample_buf, normal_salt, prefix_size)!=0) // salt prefix not preserved - throw Exception("parser.runtime", + throw Exception(PARSER_RUNTIME, 0, "crypt on this platform does not support '%.*s' salt prefix", prefix_size, normal_salt); r.write_pass_lang(String(pa_strdup(static_sample_buf))); #else - throw Exception("parser.runtime", + throw Exception(PARSER_RUNTIME, 0, "salt must start with '" PA_MD5PW_ID "'"); #endif } } -static const char* hex_string(unsigned char* bytes, size_t size, bool upcase) { - char *bytes_hex=new(PointerFreeGC) char [size*2/*byte->hh*/+1/*for zero-teminator*/]; - unsigned char *src=bytes; - unsigned char *end=bytes+size; - char *dest=bytes_hex; - - const char *hex=upcase?"0123456789ABCDEF":"0123456789abcdef"; - - for(; src> (32-(bits)))) +void SHA1ProcessMessageBlock(SHA1Context *); +void SHA1PadMessage(SHA1Context *); +void SHA1Reset(SHA1Context *context) { + context->Length_Low = context->Length_High = context->Message_Block_Index = 0; + context->Message_Digest[0] = 0x67452301; + context->Message_Digest[1] = 0xEFCDAB89; + context->Message_Digest[2] = 0x98BADCFE; + context->Message_Digest[3] = 0x10325476; + context->Message_Digest[4] = 0xC3D2E1F0; + context->Computed = context->Corrupted = 0; +} + +int SHA1Result(SHA1Context *context) { + if (context->Corrupted) + return 0; + if (!context->Computed) { + SHA1PadMessage(context); + context->Computed = 1; + } + return 1; +} + +void SHA1Input(SHA1Context *context, const unsigned char *message_array, unsigned length) { + if (!length) + return; + if (context->Computed || context->Corrupted) { + context->Corrupted = 1; + return; + } + + while(length-- && !context->Corrupted) { + context->Message_Block[context->Message_Block_Index++] = (*message_array & 0xFF); + context->Length_Low += 8; + context->Length_Low &= 0xFFFFFFFF; + if (!context->Length_Low && !(context->Length_High=((1+context->Length_High)&0xFFFFFFFF))) + context->Corrupted = 1; // too long message + if (context->Message_Block_Index == 64) + SHA1ProcessMessageBlock(context); + message_array++; + } +} + +void SHA1ProcessMessageBlock(SHA1Context *context) { + const unsigned K[] = {0x5A827999, 0x6ED9EBA1, 0x8F1BBCDC, 0xCA62C1D6 }; + int t; + unsigned temp, W[80], buf[5]; + unsigned &A=buf[0], &B=buf[1], &C=buf[2], &D=buf[3], &E=buf[4]; + + for(t = 0; t < 16; t++) + W[t] = (((unsigned) context->Message_Block[t * 4]) << 24) | (((unsigned) context->Message_Block[t * 4 + 1]) << 16) | (((unsigned) context->Message_Block[t * 4 + 2]) << 8) | ((unsigned) context->Message_Block[t * 4 + 3]); + + for(t = 16; t < 80; t++) + W[t] = SHA1CircularShift(1,W[t-3] ^ W[t-8] ^ W[t-14] ^ W[t-16]); + + memcpy (buf, context->Message_Digest, sizeof(buf)); + for(t = 0; t < 20; t++) { + temp = (SHA1CircularShift(5,A) + ((B & C) | ((~B) & D)) + E + W[t] + K[0]) & 0xFFFFFFFF; + E = D; D = C; + C = SHA1CircularShift(30,B); + B = A; A = temp; + } + + for(t = 20; t < 40; t++) { + temp = (SHA1CircularShift(5,A) + (B ^ C ^ D) + E + W[t] + K[1]) & 0xFFFFFFFF; + E = D; D = C; + C = SHA1CircularShift(30,B); + B = A; A = temp; + } + + for(t = 40; t < 60; t++) { + temp = (SHA1CircularShift(5,A) + ((B & C) | (B & D) | (C & D)) + E + W[t] + K[2]) & 0xFFFFFFFF; + E = D; D = C; + C = SHA1CircularShift(30,B); + B = A; A = temp; + } + + for(t = 60; t < 80; t++) { + temp = (SHA1CircularShift(5,A) + (B ^ C ^ D) + E + W[t] + K[3]) & 0xFFFFFFFF; + E = D; D = C; + C = SHA1CircularShift(30,B); + B = A; A = temp; + } + + for (t = 0; t < 5; t++) + context->Message_Digest[t] = (context->Message_Digest[t] + buf[t]) & 0xFFFFFFFF; + + context->Message_Block_Index = 0; +} + +void SHA1PadMessage(SHA1Context *context) { + context->Message_Block[context->Message_Block_Index++] = 0x80; + if (context->Message_Block_Index > 56) { + //was 55, one shift + while(context->Message_Block_Index < 64) + context->Message_Block[context->Message_Block_Index++] = 0; + SHA1ProcessMessageBlock(context); + while(context->Message_Block_Index < 56) + context->Message_Block[context->Message_Block_Index++] = 0; + } else + while(context->Message_Block_Index < 56) + context->Message_Block[context->Message_Block_Index++] = 0; + context->Message_Block[56] = (context->Length_High >> 24) & 0xFF; + context->Message_Block[57] = (context->Length_High >> 16) & 0xFF; + context->Message_Block[58] = (context->Length_High >> 8) & 0xFF; + context->Message_Block[59] = (context->Length_High) & 0xFF; + context->Message_Block[60] = (context->Length_Low >> 24) & 0xFF; + context->Message_Block[61] = (context->Length_Low >> 16) & 0xFF; + context->Message_Block[62] = (context->Length_Low >> 8) & 0xFF; + context->Message_Block[63] = (context->Length_Low) & 0xFF; + SHA1ProcessMessageBlock(context); +} + +#ifdef PA_BIG_ENDIAN +#define SWAP(n) (n) +#else +#define SWAP(n) (((n) << 24) | (((n) & 0xff00) << 8) | (((n) >> 8) & 0xff00) | ((n) >> 24)) +#endif + +void SHA1ReadDigest(void *buf, SHA1Context *c) +{ + if(!SHA1Result(c)) + throw Exception (PARSER_RUNTIME, 0, "Can not compute SHA1"); + + ((uint32_t *)buf)[0] = SWAP(c->Message_Digest[0]); + ((uint32_t *)buf)[1] = SWAP(c->Message_Digest[1]); + ((uint32_t *)buf)[2] = SWAP(c->Message_Digest[2]); + ((uint32_t *)buf)[3] = SWAP(c->Message_Digest[3]); + ((uint32_t *)buf)[4] = SWAP(c->Message_Digest[4]); +} + +static void _sha1(Request& r, MethodParams& params) { + const char *string = params.as_string(0, PARAMETER_MUST_BE_STRING).cstr_to_string_body_untaint(String::L_AS_IS, r.connection(false), &r.charsets).cstr(); + + SHA1Context c; + unsigned char digest[20]; + SHA1Reset (&c); + SHA1Input (&c, (const unsigned char*)string, strlen(string)); + SHA1ReadDigest(digest, &c); + + r.write_pass_lang(*new String(hex_string(digest, sizeof(digest), false))); +} + +void memxor(char *dest, const char *src, size_t n){ + for (;n>0;n--) *dest++ ^= *src++; +} + +#define IPAD 0x36 +#define OPAD 0x5c + +#define HMAC(key,init,update,final,blocklen,digestlen){ \ + unsigned char tempdigest[digestlen], keydigest[digestlen]; \ + size_t keylen=strlen(key); \ + /* Reduce the key's size, so that it becomes <= blocklen bytes. */ \ + if (keylen > blocklen){ \ + init(&c); \ + update(&c,(const unsigned char*)hmac, keylen); \ + final(keydigest, &c); \ + key = (char *)keydigest; \ + keylen = digestlen; \ + } \ + /* Compute TEMP from KEY and STRING. */ \ + char block[blocklen]; \ + memset (block, IPAD, blocklen); \ + memxor (block, key, keylen); \ + init(&c); \ + update(&c, (const unsigned char*)block, blocklen); \ + update(&c, (const unsigned char*)data.str, data.length); \ + final(tempdigest, &c); \ + /* Compute result from KEY and TEMP. */ \ + memset (block, OPAD, blocklen); \ + memxor (block, key, keylen); \ + init(&c); \ + update(&c, (const unsigned char*)block, blocklen); \ + update(&c, (const unsigned char*)tempdigest, digestlen); \ +} + +static void _digest(Request& r, MethodParams& params) { + const String &smethod = params.as_string(0, PARAMETER_MUST_BE_STRING); + + Value& vdata=params.as_no_junction(1, "parameter must be string or file"); + + String::C data; + if(const String* sdata=vdata.get_string()){ + String::Body body=sdata->cstr_to_string_body_untaint(String::L_AS_IS, r.connection(false), &r.charsets); // explode content, honor tainting changes + data=String::C(body.cstr(), body.length()); + } else { + VFile *file=vdata.as_vfile(String::L_AS_IS); + data=String::C(file->value_ptr(),file->value_size()); + } + + enum Method { M_MD5, M_SHA1, M_SHA256, M_SHA512 } method; + + if (smethod == "md5") method = M_MD5; + else if (smethod == "sha1" ) method = M_SHA1; + else if (smethod == "sha256" ) method = M_SHA256; + else if (smethod == "sha512" ) method = M_SHA512; + else throw Exception(PARSER_RUNTIME, &smethod, "must be 'md5' or 'sha1'"); + + const char *hmac=0; + enum Format { F_HEX, F_BASE64 } format = F_HEX; + + if(params.count() == 3) + if(HashStringValue* options=params.as_hash(2)) { + int valid_options=0; + if(Value* value=options->get("hmac")) { + hmac=value->as_string().cstr(); + valid_options++; + } + if(Value* value=options->get("format")) { + const String& sformat=value->as_string(); + if (sformat == "hex") format = F_HEX; + else if (sformat == "base64" ) format = F_BASE64; + else throw Exception(PARSER_RUNTIME, &sformat, "must be 'hex' or 'base64'"); + valid_options++; + } + if(valid_options!=options->count()) + throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION); + } + + String::C digest; + + if(method == M_MD5){ + PA_MD5_CTX c; + if(hmac){ + HMAC(hmac, pa_MD5Init, pa_MD5Update, pa_MD5Final, 64, 16); + } else { + pa_MD5Init(&c); + pa_MD5Update(&c, (const unsigned char*)data.str, data.length); + } + char *str=(char *)pa_malloc(16); + pa_MD5Final((unsigned char *)str, &c); + digest = String::C(str, 16); + } + + if(method == M_SHA1){ + SHA1Context c; + if(hmac){ + HMAC(hmac, SHA1Reset, SHA1Input, SHA1ReadDigest, 64, 20); + } else { + SHA1Reset(&c); + SHA1Input(&c, (const unsigned char*)data.str, data.length); + } + char *str=(char *)pa_malloc(20); + SHA1ReadDigest(str, &c); + digest = String::C(str, 20); + } + + if(method == M_SHA256){ + SHA256_CTX c; + if(hmac){ + HMAC(hmac, pa_SHA256_Init, pa_SHA256_Update, pa_SHA256_Final, 64, SHA256_DIGEST_LENGTH); + } else { + pa_SHA256_Init(&c); + pa_SHA256_Update(&c, (const unsigned char*)data.str, data.length); + } + char *str=(char *)pa_malloc(SHA256_DIGEST_LENGTH); + pa_SHA256_Final((unsigned char *)str, &c); + digest = String::C(str, SHA256_DIGEST_LENGTH); + } + + if(method == M_SHA512){ + SHA512_CTX c; + if(hmac){ + HMAC(hmac, pa_SHA512_Init, pa_SHA512_Update, pa_SHA512_Final, 128, SHA512_DIGEST_LENGTH); + } else { + pa_SHA512_Init(&c); + pa_SHA512_Update(&c, (const unsigned char*)data.str, data.length); + } + char *str=(char *)pa_malloc(SHA512_DIGEST_LENGTH); + pa_SHA512_Final((unsigned char *)str, &c); + digest = String::C(str, SHA512_DIGEST_LENGTH); + } + + if(format == F_HEX){ + r.write_pass_lang(*new String(hex_string((unsigned char *)digest.str, digest.length, false))); + } + if(format == F_BASE64){ + r.write_pass_lang(*new String(pa_base64_encode(digest.str, digest.length))); + } +} + static void _uuid(Request& r, MethodParams& /*params*/) { + uuid uuid=get_uuid(); + + const size_t bufsize=36+1/*zero-teminator*/+1/*for faulty snprintfs*/; + char* cstr=new(PointerFreeGC) char[bufsize]; - // random - struct uuid uuid; - random(&uuid, sizeof(uuid)); - - // http://www.opengroup.org/onlinepubs/9629399/apdxa.htm#tagtcjh_35 - // ~ - // version = DCE Security version, with embedded POSIX UIDs. - // variant = DCE - // - // DCE=Distributed Computing Environment - // http://www.opengroup.org/dce/ - // - // they say this influences comparison&such, - // but could not figure out how, hence structure layout specified strictly - // anyhow, uuidgen on Win32 yield those values - // - // xxxxxxxx-xxxx-4xxx-{8,9,A,B}xxx-xxxxxxxxxxxx - uuid.clock_seq = (uuid.clock_seq & 0x3FFF) | 0x8000; - uuid.time_hi_and_version = (uuid.time_hi_and_version & 0x0FFF) | 0x4000; - - // format - const int uuid_cstr_bufsize=36+1/*for zero-teminator*/+1/*for faulty snprintfs*/; - char *uuid_cstr=new(PointerFreeGC) char[uuid_cstr_bufsize]; - snprintf(uuid_cstr, uuid_cstr_bufsize, - "%08X-%04X-%04X-%02X%02X-%02X%02X%02X%02X%02X%02X", - uuid.time_low, uuid.time_mid, uuid.time_hi_and_version, - uuid.clock_seq >> 8, uuid.clock_seq & 0xFF, - uuid.node[0], uuid.node[1], uuid.node[2], - uuid.node[3], uuid.node[4], uuid.node[5]); + snprintf(cstr, bufsize, + "%08X-%04X-%04X-%02X%02X-%02X%02X%02X%02X%02X%02X", + uuid.time_low, uuid.time_mid, uuid.time_hi_and_version, + uuid.clock_seq >> 8, uuid.clock_seq & 0xFF, + uuid.node[0], uuid.node[1], uuid.node[2], + uuid.node[3], uuid.node[4], uuid.node[5]); - r.write_pass_lang(*new String(uuid_cstr)); + r.write_pass_lang(*new String(cstr)); } static void _uid64(Request& r, MethodParams& /*params*/) { @@ -363,10 +504,55 @@ static void _uid64(Request& r, MethodPar } static void _crc32(Request& r, MethodParams& params) { - const char *string=params.as_string(0, "parameter must be string").cstr(); + const char *string=params.as_string(0, PARAMETER_MUST_BE_STRING).cstr(); r.write_no_lang(*new VInt(pa_crc32(string, strlen(string)))); } +static void toBase(unsigned long long int value, unsigned int base, char*& ptr){ + static const char* hex="0123456789ABCDEF"; + unsigned int rest = (unsigned int)(value % base); + if(value >= base) + toBase( (value-rest)/base, base, ptr); + *ptr++=(char)hex[rest]; +} + +static void _convert(Request& r, MethodParams& params) { + const char *str=params.as_string(0, PARAMETER_MUST_BE_STRING).cstr(); + + int base_from=params.as_int(1, "base from must be integer", r); + if(base_from < 2 || base_from > 16) + throw Exception(PARSER_RUNTIME, 0, "base from must be an integer from 2 to 16"); + + int base_to=params.as_int(2, "base to must be integer", r); + if(base_to < 2 || base_to > 16) + throw Exception(PARSER_RUNTIME, 0, "base to must be an integer from 2 to 16"); + + while(isspace(*str)) + str++; + + if(!*str) + return; + + bool negative=false; + if(str[0]=='-') { + negative=true; + str++; + } else if(str[0]=='+') { + str++; + } + + unsigned long long int value=pa_atoul(str, base_from); + + char result_cstr[sizeof(unsigned long long int)*8+1/*minus for negative number*/+1/*terminator*/]; + char* ptr=result_cstr; + if(negative) + *ptr++='-'; + + toBase(value, base_to, ptr); + *ptr=0; + r.write_pass_lang(*new String(pa_strdup(result_cstr))); +} + // constructor MMath::MMath(): Methoded("math") { @@ -380,7 +566,8 @@ MMath::MMath(): Methoded("math") { ADD1(round); ADD1(floor); ADD1(ceiling); ADD1(trunc); ADD1(frac); ADD1(abs); ADD1(sign); - ADD1(exp); ADD1(log); + ADD1(exp); + ADD1(log); ADD1(log10); ADD1(sin); ADD1(asin); ADD1(cos); ADD1(acos); ADD1(tan); ADD1(atan); @@ -388,20 +575,30 @@ MMath::MMath(): Methoded("math") { ADD1(sqrt); ADD1(random); - // ^pow(x;y) + // ^math:pow(x;y) ADD2(pow); - // ^crypt[password;salt] + // ^math:crypt[password;salt] ADD2(crypt); - // ^md5[string] + // ^math:md5[string] ADD1(md5); + // ^math:sha1[string] + ADD1(sha1); + + // ^math:digest[method;string|file;options] + add_native_method("digest", Method::CT_STATIC, _digest, 2, 3); + + // ^math:crc32[string] ADD1(crc32); - // ^uuid[] + // ^math:uuid[] ADD0(uuid); - // ^uid64[] + // ^math:uid64[] ADD0(uid64); + + // ^math:convert[number](base-from;base-to) + add_native_method("convert", Method::CT_STATIC, _convert, 3, 3); }