--- parser3/src/classes/math.C 2003/04/15 07:17:42 1.27 +++ parser3/src/classes/math.C 2003/04/15 11:34:03 1.28 @@ -3,19 +3,24 @@ Copyright(c) 2001, 2003 ArtLebedev Group(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* IDENT_MATH_C="$Date: 2003/04/15 07:17:42 $"; +static const char* IDENT_MATH_C="$Date: 2003/04/15 11:34:03 $"; #include "pa_common.h" #include "pa_vint.h" #include "pa_vmath.h" #include "pa_request.h" #include "pa_md5.h" +#include "pa_threads.h" #ifdef WIN32 -// for threadID +# define _WIN32_WINNT 0x400 # include +# include #endif #ifdef HAVE_CRYPT_H @@ -32,16 +37,118 @@ static const char* IDENT_MATH_C="$Date: class MMath : public Methoded { public: MMath(Pool& pool); - void configure_admin(Request& r); public: // Methoded 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 -static unsigned int randomizer=0; static inline int _random(uint top) { - return (int)(((double)((randomizer=rand())% RAND_MAX)) / RAND_MAX * top ); + uint raw; + random(&raw, sizeof(raw)); + return int(double(raw) / 0x100000000 * top ); } static void _random(Request& r, const String& method_name, MethodParams *params) { Pool& pool=r.pool(); @@ -196,12 +303,59 @@ static void _md5(Request& r, const Strin 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 MMath::MMath(Pool& apool) : Methoded(apool, "math") { // ^FUNC(expr) -#define ADD1(name) \ - add_native_method(#name, Method::CT_STATIC, _##name, 1, 1) +#define ADDX(name, X) \ + 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(trunc); ADD1(frac); @@ -214,9 +368,6 @@ MMath::MMath(Pool& apool) : Methoded(apo ADD1(sqrt); ADD1(random); -#define ADD2(name) \ - add_native_method(#name, Method::CT_STATIC, _##name, 2, 2) - // ^pow(x;y) ADD2(pow); @@ -225,24 +376,9 @@ MMath::MMath(Pool& apool) : Methoded(apo // ^md5[string] ADD1(md5); -} -// in MSVC each thread has it's own pseudo-random sequence -// in win32 apache each thread can handle multiple requests -// so to get proper randoms we remember random generated in one thread -void MMath::configure_admin(Request&) { - // setting seed - srand( - randomizer -#ifdef WIN32 - ^ GetCurrentThreadId() -#else - ^ getpid() -#endif - ^(unsigned int)time(NULL) - ); - if(!randomizer) - randomizer=rand(); + // ^guid[] + ADD0(guid); } // global variables