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| version 1.18, 2002/04/18 10:51:00 | version 1.28, 2003/04/15 11:34:03 |
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| Line 1 | Line 1 |
| /** @file | /** @file |
| Parser: @b math parser class. | Parser: @b math parser class. |
| Copyright (c) 2001, 2002 ArtLebedev Group (http://www.artlebedev.com) | Copyright(c) 2001, 2003 ArtLebedev Group(http://www.artlebedev.com) |
| Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru) | Author: Alexandr Petrosian <paf@design.ru>(http://paf.design.ru) |
| $Id$ | portions from gen_uuid.c, |
| Copyright (C) 1996, 1997, 1998, 1999 Theodore Ts'o. | |
| */ | */ |
| static const char* IDENT_MATH_C="$Date$"; | |
| #include "pa_common.h" | #include "pa_common.h" |
| #include "pa_vint.h" | #include "pa_vint.h" |
| #include "pa_vmath.h" | #include "pa_vmath.h" |
| #include "pa_request.h" | #include "pa_request.h" |
| #include "pa_md5.h" | |
| #include "pa_threads.h" | |
| #ifdef WIN32 | #ifdef WIN32 |
| # define _WIN32_WINNT 0x400 | |
| # include <windows.h> | # include <windows.h> |
| # include <wincrypt.h> | |
| #endif | |
| #ifdef HAVE_CRYPT_H | |
| #include <crypt.h> | |
| #endif | #endif |
| // defines | // defines |
| #define PI 3.1415926535 | #define PI 3.1415926535 |
| #define MAX_SALT 8 | |
| // class | // class |
| class MMath : public Methoded { | class MMath : public Methoded { |
| public: | public: |
| MMath(Pool& pool); | MMath(Pool& pool); |
| void configure_admin(Request& r); | |
| public: // Methoded | public: // Methoded |
| bool used_directly() { return false; } | bool used_directly() { return false; } |
| }; | }; |
| #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 | // methods |
| static unsigned int randomizer=0; | static inline int _random(uint top) { |
| uint raw; | |
| random(&raw, sizeof(raw)); | |
| return int(double(raw) / 0x100000000 * top ); | |
| } | |
| static void _random(Request& r, const String& method_name, MethodParams *params) { | static void _random(Request& r, const String& method_name, MethodParams *params) { |
| Pool& pool=r.pool(); | Pool& pool=r.pool(); |
| Value& range=params->as_junction(0, "range must be expression"); | Value& range=params->as_junction(0, "range must be expression"); |
| double top=r.process_to_value(range).as_double(); | double top=r.process_to_value(range).as_double(); |
| if(top<=1) | if(top<=0) |
| throw Exception("parser.runtime", | throw Exception("parser.runtime", |
| &method_name, | &method_name, |
| "top must be above 1 (%g)", top); | "top must be above 0(%g)", top); |
| int result=(int)( ((double)((randomizer=rand())% RAND_MAX)) / RAND_MAX * uint(top) ); | r.write_no_lang(*new(pool) VInt(pool, _random(uint(top)))); |
| r.write_no_lang(*new(pool) VInt(pool, result)); | |
| } | } |
| typedef double (*math1_func_ptr)(double); | typedef double(*math1_func_ptr)(double); |
| static double frac(double param) { return param-trunc(param); } | static double frac(double param) { return param-trunc(param); } |
| static double degrees(double param) { return param /PI *180; } | static double degrees(double param) { return param /PI *180; } |
| static double radians(double param) { return param /180 *PI; } | static double radians(double param) { return param /180 *PI; } |
| Line 102 static void math2(Request& r, | Line 218 static void math2(Request& r, |
| } | } |
| MATH2(pow); | MATH2(pow); |
| inline bool is_salt_body_char(int c) { | |
| return isalnum(c) || c == '.' || c=='/'; | |
| } | |
| static size_t calc_prefix_size(const char *salt) { | |
| if(size_t salt_size=strlen(salt)) { | |
| if(!is_salt_body_char(salt[0])) { // $... {... | |
| const char *cur=salt+1; // skip | |
| while(is_salt_body_char(*cur++)) // ...$ ...} | |
| ; | |
| return cur-salt; | |
| } else | |
| return 0; | |
| } else | |
| return 0; | |
| } | |
| static void _crypt(Request& r, const String& method_name, MethodParams *params) { | |
| Pool& pool=r.pool(); | |
| const char *password=params->as_string(0, "password must be string").cstr(); | |
| const char *maybe_bodyless_salt=params->as_string(1, "salt must be string").cstr(); | |
| size_t prefix_size=calc_prefix_size(maybe_bodyless_salt); | |
| const char *normal_salt; | |
| char normalize_buf[MAX_STRING]; | |
| if(prefix_size==strlen(maybe_bodyless_salt)) { // bodyless? | |
| strncpy(normalize_buf, maybe_bodyless_salt, MAX_STRING-MAX_SALT-1); | |
| char *cur=normalize_buf+strlen(normalize_buf); | |
| // sould add up MAX_SALT random chars | |
| static unsigned char itoa64[] = /* 0 ... 63 => ASCII - 64 */ | |
| "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; | |
| for(int i=0; i<MAX_SALT; i++) | |
| *cur++=itoa64[_random(64)]; | |
| *cur=0; | |
| normal_salt=normalize_buf; | |
| } else | |
| normal_salt=maybe_bodyless_salt; | |
| /* FreeBSD style MD5 string | |
| */ | |
| if(strncmp(normal_salt, PA_MD5PW_ID, PA_MD5PW_IDLEN) == 0) { | |
| const size_t sample_size=120; | |
| char *sample_buf=(char *)pool.malloc(sample_size); | |
| PA_MD5Encode((const unsigned char *)password, | |
| (const unsigned char *)normal_salt, 1/*TRUE: mix in magic string*/, | |
| sample_buf, sample_size); | |
| r.write_pass_lang(*new(pool) String(pool, sample_buf)); | |
| } else { | |
| #ifdef HAVE_CRYPT | |
| const char *sample_buf=crypt(password, normal_salt); | |
| if(!sample_buf // nothing generated | |
| || !sample_buf[0] // generated nothing | |
| || strncmp(sample_buf, normal_salt, prefix_size)!=0) // salt prefix not preserved | |
| throw Exception("parser.runtime", | |
| &method_name, | |
| "on this platform does not support '%.*s' salt prefix", prefix_size, normal_salt); | |
| r.write_pass_lang(*new(pool) String(pool, sample_buf)); | |
| #else | |
| throw Exception("parser.runtime", | |
| &method_name, | |
| "salt must start with '" PA_MD5PW_ID "'"); | |
| #endif | |
| } | |
| } | |
| static void _md5(Request& r, const String& method_name, MethodParams *params) { | |
| Pool& pool=r.pool(); | |
| const char *string=params->as_string(0, "parameter must be string").cstr(); | |
| PA_MD5_CTX context; | |
| unsigned char digest[16]; | |
| PA_MD5Init(&context); | |
| PA_MD5Update(&context, (const unsigned char*)string, strlen(string)); | |
| PA_MD5Final(digest, &context); | |
| char *digest_bytes_hex=(char *)pool.malloc(sizeof(digest)*2/*byte->hh*/+1/*for zero-teminator*/); | |
| unsigned char *src=digest; | |
| unsigned char *end=digest+sizeof(digest); | |
| char *dest=digest_bytes_hex; | |
| while(src<end) | |
| dest+=snprintf(dest, 3, "%02x", *src++); | |
| r.write_pass_lang(*new(pool) String(pool, digest_bytes_hex)); | |
| } | |
| /// to hell with extra bytes on 64bit platforms | |
| struct uuid { | |
| unsigned int time_low; | |
| unsigned short time_mid; | |
| unsigned short time_hi_and_version; | |
| unsigned short clock_seq; | |
| unsigned char node[6]; | |
| }; | |
| static void _guid(Request& r, const String& method_name, MethodParams *params) { | |
| Pool& pool=r.pool(); | |
| // 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 guid_cstr_bufsize=32+1/*for zero-teminator*/; | |
| char *guid_cstr=(char *)pool.malloc(guid_cstr_bufsize); | |
| snprintf(guid_cstr, guid_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(pool) String(pool, guid_cstr)); | |
| } | |
| // constructor | // constructor |
| MMath::MMath(Pool& apool) : Methoded(apool, "math") { | MMath::MMath(Pool& apool) : Methoded(apool, "math") { |
| // ^FUNC(expr) | // ^FUNC(expr) |
| #define ADD1(name) \ | #define ADDX(name, X) \ |
| add_native_method(#name, Method::CT_STATIC, _##name, 1, 1) | add_native_method(#name, Method::CT_STATIC, _##name, X, X) |
| #define ADD0(name) ADDX(name, 0) | |
| #define ADD1(name) ADDX(name, 1) | |
| #define ADD2(name) ADDX(name, 2) | |
| ADD1(round); ADD1(floor); ADD1(ceiling); | ADD1(round); ADD1(floor); ADD1(ceiling); |
| ADD1(trunc); ADD1(frac); | ADD1(trunc); ADD1(frac); |
| Line 120 MMath::MMath(Pool& apool) : Methoded(apo | Line 368 MMath::MMath(Pool& apool) : Methoded(apo |
| ADD1(sqrt); | ADD1(sqrt); |
| ADD1(random); | ADD1(random); |
| #define ADD2(name) \ | |
| add_native_method(#name, Method::CT_STATIC, _##name, 2, 2) | |
| // ^pow(x;y) | // ^pow(x;y) |
| ADD2(pow); | ADD2(pow); |
| } | // ^crypt[password;salt] |
| ADD2(crypt); | |
| // in MSVC each thread has it's own pseudo-random sequence | // ^md5[string] |
| // in win32 apache each thread can handle multiple requests | ADD1(md5); |
| // so to get proper randoms we remember random generated in one thread | |
| void MMath::configure_admin(Request&) { | // ^guid[] |
| // setting seed | ADD0(guid); |
| srand( | |
| randomizer | |
| #ifdef WIN32 | |
| ^ GetCurrentThreadId() | |
| #else | |
| ^ getpid() | |
| #endif | |
| ^ (unsigned int)time(NULL) | |
| ); | |
| if(!randomizer) | |
| randomizer=rand(); | |
| } | } |
| // global variables | // global variables |