Annotation of parser3/src/classes/math.C, revision 1.58
1.1 parser 1: /** @file
2: Parser: @b math parser class.
3:
1.40 paf 4: Copyright(c) 2001-2005 ArtLebedev Group(http://www.artlebedev.com)
1.20 paf 5: Author: Alexandr Petrosian <paf@design.ru>(http://paf.design.ru)
1.28 paf 6:
7: portions from gen_uuid.c,
8: Copyright (C) 1996, 1997, 1998, 1999 Theodore Ts'o.
1.22 paf 9: */
1.1 parser 10:
1.58 ! misha 11: static const char * const IDENT_MATH_C="$Date: 2010-10-13 11:30:08 $";
1.1 parser 12:
1.34 paf 13: #include "pa_vmethod_frame.h"
1.1 parser 14: #include "pa_common.h"
15: #include "pa_vint.h"
1.2 parser 16: #include "pa_vmath.h"
1.1 parser 17: #include "pa_request.h"
1.19 paf 18: #include "pa_md5.h"
1.55 misha 19: #include "pa_random.h"
1.1 parser 20:
1.5 parser 21: #ifdef WIN32
1.28 paf 22: # define _WIN32_WINNT 0x400
1.5 parser 23: # include <windows.h>
1.28 paf 24: # include <wincrypt.h>
1.5 parser 25: #endif
26:
1.34 paf 27: #ifdef HAVE_CRYPT
28: # ifdef HAVE_CRYPT_H
29: # include <crypt.h>
30: # endif
31: #else
32: extern char *crypt(const char* , const char* );
1.20 paf 33: #endif
34:
1.1 parser 35: // defines
36:
1.20 paf 37: #define MAX_SALT 8
1.1 parser 38:
39: // class
40:
1.34 paf 41: class MMath: public Methoded {
1.1 parser 42: public:
1.34 paf 43: MMath();
1.5 parser 44:
1.1 parser 45: public: // Methoded
1.15 paf 46: bool used_directly() { return false; }
1.1 parser 47: };
48:
1.34 paf 49: // global variables
50:
51: DECLARE_CLASS_VAR(math, 0 /*fictive*/, new MMath);
52:
1.1 parser 53: // methods
1.34 paf 54:
55: static void _random(Request& r, MethodParams& params) {
1.41 paf 56: double top=params.as_double(0, "range must be expression", r);
1.34 paf 57: if(top<=0 || top>MAX_UINT)
1.45 misha 58: throw Exception(PARSER_RUNTIME,
1.34 paf 59: 0,
60: "top(%g) must be [1..%u]", top, MAX_UINT);
1.1 parser 61:
1.34 paf 62: r.write_no_lang(*new VInt(_random(uint(top))));
1.1 parser 63: }
64:
65:
1.20 paf 66: typedef double(*math1_func_ptr)(double);
1.3 parser 67: static double frac(double param) { return param-trunc(param); }
68: static double degrees(double param) { return param /PI *180; }
69: static double radians(double param) { return param /180 *PI; }
1.1 parser 70:
1.34 paf 71: static void math1(Request& r, MethodParams& params, math1_func_ptr func) {
1.41 paf 72: double param=params.as_double(0, "parameter must be expression", r);
73: double result=func(param);
1.34 paf 74: r.write_no_lang(*new VDouble(result));
1.1 parser 75: }
76:
77: #define MATH1(name) \
1.34 paf 78: static void _##name(Request& r, MethodParams& params) {\
79: math1(r, params, &name);\
1.1 parser 80: }
81: #define MATH1P(name_parser, name_c) \
1.34 paf 82: static void _##name_parser(Request& r, MethodParams& params) {\
83: math1(r, params, &name_c);\
1.1 parser 84: }
85: MATH1(round); MATH1(floor); MATH1P(ceiling, ceil);
1.3 parser 86: MATH1(trunc); MATH1(frac);
1.1 parser 87: MATH1P(abs, fabs); MATH1(sign);
1.46 misha 88: MATH1(exp);
1.48 misha 89: MATH1(log); MATH1(log10);
1.1 parser 90: MATH1(sin); MATH1(asin);
91: MATH1(cos); MATH1(acos);
92: MATH1(tan); MATH1(atan);
1.3 parser 93: MATH1(degrees); MATH1(radians);
1.1 parser 94: MATH1(sqrt);
95:
96:
97: typedef double (*math2_func_ptr)(double, double);
1.34 paf 98: static void math2(Request& r, MethodParams& params, math2_func_ptr func) {
1.41 paf 99: double a=params.as_double(0, "parameter must be expression", r);
100: double b=params.as_double(1, "parameter must be expression", r);
101: double result=func(a, b);
1.34 paf 102: r.write_no_lang(*new VDouble(result));
1.1 parser 103: }
104:
105: #define MATH2(name) \
1.34 paf 106: static void _##name(Request& r, MethodParams& params) {\
107: math2(r, params, &name);\
1.1 parser 108: }
109: MATH2(pow);
110:
1.20 paf 111: inline bool is_salt_body_char(int c) {
112: return isalnum(c) || c == '.' || c=='/';
113: }
1.34 paf 114: static size_t calc_prefix_size(const char* salt) {
1.37 paf 115: if(strlen(salt)) {
1.39 paf 116: if(!is_salt_body_char((unsigned char)salt[0])) { // $... {...
1.34 paf 117: const char* cur=salt+1; // skip
1.39 paf 118: while(is_salt_body_char((unsigned char)*cur++)) // ...$ ...}
1.20 paf 119: ;
120: return cur-salt;
121: } else
122: return 0;
123: } else
124: return 0;
125: }
1.34 paf 126: static void _crypt(Request& r, MethodParams& params) {
127: const char* password=params.as_string(0, "password must be string").cstr();
128: const char* maybe_bodyless_salt=params.as_string(1, "salt must be string").cstr();
1.20 paf 129:
130: size_t prefix_size=calc_prefix_size(maybe_bodyless_salt);
1.34 paf 131: const char* normal_salt;
1.20 paf 132: char normalize_buf[MAX_STRING];
133: if(prefix_size==strlen(maybe_bodyless_salt)) { // bodyless?
134: strncpy(normalize_buf, maybe_bodyless_salt, MAX_STRING-MAX_SALT-1);
135: char *cur=normalize_buf+strlen(normalize_buf);
136: // sould add up MAX_SALT random chars
137: static unsigned char itoa64[] = /* 0 ... 63 => ASCII - 64 */
138: "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
139: for(int i=0; i<MAX_SALT; i++)
140: *cur++=itoa64[_random(64)];
141: *cur=0;
142: normal_salt=normalize_buf;
143: } else
144: normal_salt=maybe_bodyless_salt;
1.19 paf 145:
1.54 misha 146: /* FreeBSD style MD5 string
147: */
148: if(strncmp(normal_salt, PA_MD5PW_ID, PA_MD5PW_IDLEN) == 0) {
1.19 paf 149: const size_t sample_size=120;
1.34 paf 150: char *sample_buf=new(PointerFreeGC) char[sample_size];
151: pa_MD5Encode((const unsigned char *)password,
152: (const unsigned char *)normal_salt, sample_buf, sample_size);
153: String sample(sample_buf);
154: r.write_pass_lang(sample);
1.54 misha 155: } else {
1.20 paf 156: #ifdef HAVE_CRYPT
1.34 paf 157: const char* static_sample_buf=crypt(password, normal_salt);
158: if(!static_sample_buf // nothing generated
159: || !static_sample_buf[0] // generated nothing
160: || strncmp(static_sample_buf, normal_salt, prefix_size)!=0) // salt prefix not preserved
1.45 misha 161: throw Exception(PARSER_RUNTIME,
1.34 paf 162: 0,
163: "crypt on this platform does not support '%.*s' salt prefix", prefix_size, normal_salt);
1.20 paf 164:
1.34 paf 165: r.write_pass_lang(String(pa_strdup(static_sample_buf)));
1.20 paf 166: #else
1.45 misha 167: throw Exception(PARSER_RUNTIME,
1.34 paf 168: 0,
1.19 paf 169: "salt must start with '" PA_MD5PW_ID "'");
1.20 paf 170: #endif
171: }
1.19 paf 172: }
173:
1.34 paf 174: static void _md5(Request& r, MethodParams& params) {
1.51 misha 175: const char *string=params.as_string(0, PARAMETER_MUST_BE_STRING).cstr();
1.27 paf 176:
177: PA_MD5_CTX context;
178: unsigned char digest[16];
1.34 paf 179: pa_MD5Init(&context);
180: pa_MD5Update(&context, (const unsigned char*)string, strlen(string));
181: pa_MD5Final(digest, &context);
1.27 paf 182:
1.34 paf 183: r.write_pass_lang(*new String(hex_string(digest, sizeof(digest), false)));
1.26 paf 184: }
185:
1.49 misha 186:
187: //SHA-1:
188:
1.50 misha 189: struct SHA1Context {
1.54 misha 190: unsigned Message_Digest[5], Length_Low, Length_High;
191: unsigned int Message_Block[64];
192: int Message_Block_Index, Computed, Corrupted;
1.50 misha 193: };
1.49 misha 194:
195: #define SHA1CircularShift(bits,word) ((((word) << (bits)) & 0xFFFFFFFF)|((word) >> (32-(bits))))
196: void SHA1ProcessMessageBlock(SHA1Context *);
197: void SHA1PadMessage(SHA1Context *);
1.50 misha 198: void SHA1Reset(SHA1Context *context) {
1.54 misha 199: context->Length_Low = context->Length_High = context->Message_Block_Index = 0;
200: context->Message_Digest[0] = 0x67452301;
201: context->Message_Digest[1] = 0xEFCDAB89;
202: context->Message_Digest[2] = 0x98BADCFE;
203: context->Message_Digest[3] = 0x10325476;
204: context->Message_Digest[4] = 0xC3D2E1F0;
205: context->Computed = context->Corrupted = 0;
1.50 misha 206: }
1.49 misha 207:
1.50 misha 208: int SHA1Result(SHA1Context *context) {
1.54 misha 209: if (context->Corrupted)
210: return 0;
211: if (!context->Computed) {
212: SHA1PadMessage(context);
213: context->Computed = 1;
214: }
215: return 1;
216: }
217:
218: void SHA1Input(SHA1Context *context, const unsigned char *message_array, unsigned length) {
219: if (!length)
220: return;
221: if (context->Computed || context->Corrupted) {
222: context->Corrupted = 1;
223: return;
224: }
225:
226: while(length-- && !context->Corrupted) {
227: context->Message_Block[context->Message_Block_Index++] = (*message_array & 0xFF);
228: context->Length_Low += 8;
229: context->Length_Low &= 0xFFFFFFFF;
230: if (!context->Length_Low && !(context->Length_High=((1+context->Length_High)&0xFFFFFFFF)))
231: context->Corrupted = 1; // too long message
232: if (context->Message_Block_Index == 64)
233: SHA1ProcessMessageBlock(context);
234: message_array++;
1.49 misha 235: }
1.50 misha 236: }
1.49 misha 237:
1.50 misha 238: void SHA1ProcessMessageBlock(SHA1Context *context) {
1.54 misha 239: const unsigned K[] = {0x5A827999, 0x6ED9EBA1, 0x8F1BBCDC, 0xCA62C1D6 };
240: int t;
241: unsigned temp, W[80], buf[5];
242: unsigned &A=buf[0], &B=buf[1], &C=buf[2], &D=buf[3], &E=buf[4];
1.50 misha 243:
1.54 misha 244: for(t = 0; t < 16; t++)
245: 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]);
1.50 misha 246:
1.54 misha 247: for(t = 16; t < 80; t++)
248: W[t] = SHA1CircularShift(1,W[t-3] ^ W[t-8] ^ W[t-14] ^ W[t-16]);
1.49 misha 249:
1.54 misha 250: memcpy (buf, context->Message_Digest, sizeof(buf));
251: for(t = 0; t < 20; t++) {
252: temp = (SHA1CircularShift(5,A) + ((B & C) | ((~B) & D)) + E + W[t] + K[0]) & 0xFFFFFFFF;
253: E = D; D = C;
254: C = SHA1CircularShift(30,B);
255: B = A; A = temp;
1.49 misha 256: }
257:
1.54 misha 258: for(t = 20; t < 40; t++) {
259: temp = (SHA1CircularShift(5,A) + (B ^ C ^ D) + E + W[t] + K[1]) & 0xFFFFFFFF;
260: E = D; D = C;
261: C = SHA1CircularShift(30,B);
262: B = A; A = temp;
1.49 misha 263: }
264:
1.54 misha 265: for(t = 40; t < 60; t++) {
266: temp = (SHA1CircularShift(5,A) + ((B & C) | (B & D) | (C & D)) + E + W[t] + K[2]) & 0xFFFFFFFF;
267: E = D; D = C;
268: C = SHA1CircularShift(30,B);
269: B = A; A = temp;
1.49 misha 270: }
271:
1.54 misha 272: for(t = 60; t < 80; t++) {
273: temp = (SHA1CircularShift(5,A) + (B ^ C ^ D) + E + W[t] + K[3]) & 0xFFFFFFFF;
274: E = D; D = C;
275: C = SHA1CircularShift(30,B);
276: B = A; A = temp;
1.49 misha 277: }
278:
1.54 misha 279: for (t = 0; t < 5; t++)
280: context->Message_Digest[t] = (context->Message_Digest[t] + buf[t]) & 0xFFFFFFFF;
1.50 misha 281:
1.54 misha 282: context->Message_Block_Index = 0;
1.50 misha 283: }
1.49 misha 284:
1.50 misha 285: void SHA1PadMessage(SHA1Context *context) {
1.54 misha 286: context->Message_Block[context->Message_Block_Index++] = 0x80;
1.50 misha 287: if (context->Message_Block_Index > 56) {
288: //was 55, one shift
1.54 misha 289: while(context->Message_Block_Index < 64)
290: context->Message_Block[context->Message_Block_Index++] = 0;
291: SHA1ProcessMessageBlock(context);
292: while(context->Message_Block_Index < 56)
293: context->Message_Block[context->Message_Block_Index++] = 0;
1.50 misha 294: } else
1.54 misha 295: while(context->Message_Block_Index < 56)
296: context->Message_Block[context->Message_Block_Index++] = 0;
297: context->Message_Block[56] = (context->Length_High >> 24) & 0xFF;
298: context->Message_Block[57] = (context->Length_High >> 16) & 0xFF;
299: context->Message_Block[58] = (context->Length_High >> 8) & 0xFF;
300: context->Message_Block[59] = (context->Length_High) & 0xFF;
301: context->Message_Block[60] = (context->Length_Low >> 24) & 0xFF;
302: context->Message_Block[61] = (context->Length_Low >> 16) & 0xFF;
303: context->Message_Block[62] = (context->Length_Low >> 8) & 0xFF;
304: context->Message_Block[63] = (context->Length_Low) & 0xFF;
305: SHA1ProcessMessageBlock(context);
1.50 misha 306: }
1.49 misha 307:
1.54 misha 308: static void _sha1(Request& r, MethodParams& params) {
309: const char *string = params.as_string(0, PARAMETER_MUST_BE_STRING).cstr();
1.49 misha 310:
1.54 misha 311: SHA1Context c;
312: SHA1Reset (&c);
313: SHA1Input (&c, (const unsigned char*)string, strlen(string));
314: if(!SHA1Result(&c))
315: throw Exception (PARSER_RUNTIME, 0, "Can not compute SHA1");
316:
1.56 misha 317: const size_t bufsize=40+1/*zero-teminator*/+1/*for faulty snprintfs*/;
1.55 misha 318: char* cstr=new(PointerFreeGC) char[bufsize];
319:
320: snprintf(cstr, bufsize,
1.54 misha 321: "%08x%08x%08x%08x%08x",
322: c.Message_Digest[0],
323: c.Message_Digest[1],
324: c.Message_Digest[2],
325: c.Message_Digest[3],
326: c.Message_Digest[4]);
1.49 misha 327:
1.55 misha 328: r.write_pass_lang(*new String(cstr));
1.54 misha 329: }
1.49 misha 330:
1.55 misha 331: static void _uuid(Request& r, MethodParams& /*params*/) {
332: uuid uuid=get_uuid();
1.49 misha 333:
1.55 misha 334: const size_t bufsize=36+1/*zero-teminator*/+1/*for faulty snprintfs*/;
335: char* cstr=new(PointerFreeGC) char[bufsize];
1.28 paf 336:
1.55 misha 337: snprintf(cstr, bufsize,
338: "%08X-%04X-%04X-%02X%02X-%02X%02X%02X%02X%02X%02X",
339: uuid.time_low, uuid.time_mid, uuid.time_hi_and_version,
340: uuid.clock_seq >> 8, uuid.clock_seq & 0xFF,
341: uuid.node[0], uuid.node[1], uuid.node[2],
342: uuid.node[3], uuid.node[4], uuid.node[5]);
1.28 paf 343:
1.55 misha 344: r.write_pass_lang(*new String(cstr));
1.28 paf 345: }
346:
1.34 paf 347: static void _uid64(Request& r, MethodParams& /*params*/) {
1.30 paf 348:
349: unsigned char id[64/8];
350: random(&id, sizeof(id));
351:
1.34 paf 352: r.write_pass_lang(*new String(hex_string(id, sizeof(id), true)));
1.30 paf 353: }
354:
1.43 misha 355: static void _crc32(Request& r, MethodParams& params) {
1.51 misha 356: const char *string=params.as_string(0, PARAMETER_MUST_BE_STRING).cstr();
1.43 misha 357: r.write_no_lang(*new VInt(pa_crc32(string, strlen(string))));
358: }
359:
1.57 misha 360: static void toBase(long value, int base, char*& ptr){
361: static const char* hex="0123456789ABCDEF";
362: int rest = value % base;
1.58 ! misha 363: if(value >= base)
1.57 misha 364: toBase( (value-rest)/base, base, ptr);
365: *ptr++=(char)hex[rest];
366: }
367:
368: static void _convert(Request& r, MethodParams& params) {
369: const char *string=params.as_string(0, PARAMETER_MUST_BE_STRING).cstr();
370: int base_from=params.as_int(1, "base from must be integer", r);
371: if(base_from < 2 || base_from > 16)
372: throw Exception(PARSER_RUNTIME, 0, "base from must be an integer from 2 to 16");
373:
374: char *error_pos;
375: long value=strtol(string, &error_pos, base_from);
376: while(char c=*error_pos++)
377: if(!isspace((unsigned char)c))
378: throw Exception("number.format",
379: 0,
380: "'%s' is invalid number (int)", string);
381:
382: int base_to=params.as_int(2, "base to must be integer", r);
383: if(base_to < 2 || base_to > 16)
384: throw Exception(PARSER_RUNTIME, 0, "base to must be an integer from 2 to 16");
385:
386: char result_cstr[sizeof(long)*8+1/*minus for negative number*/+1/*terminator*/];
387: char* ptr=(char *)&result_cstr;
388: if(value < 0){
389: *ptr++='-';
390: value=-value;
391: }
392: toBase(value, base_to, ptr);
393: *ptr=0;
394: r.write_pass_lang(*new String(pa_strdup(result_cstr)));
395: }
396:
1.1 parser 397: // constructor
398:
1.34 paf 399: MMath::MMath(): Methoded("math") {
1.1 parser 400: // ^FUNC(expr)
1.28 paf 401: #define ADDX(name, X) \
402: add_native_method(#name, Method::CT_STATIC, _##name, X, X)
403: #define ADD0(name) ADDX(name, 0)
404: #define ADD1(name) ADDX(name, 1)
405: #define ADD2(name) ADDX(name, 2)
1.1 parser 406:
407: ADD1(round); ADD1(floor); ADD1(ceiling);
1.3 parser 408: ADD1(trunc); ADD1(frac);
1.1 parser 409: ADD1(abs); ADD1(sign);
1.46 misha 410: ADD1(exp);
1.48 misha 411: ADD1(log); ADD1(log10);
1.1 parser 412: ADD1(sin); ADD1(asin);
413: ADD1(cos); ADD1(acos);
414: ADD1(tan); ADD1(atan);
1.3 parser 415: ADD1(degrees); ADD1(radians);
1.1 parser 416: ADD1(sqrt);
1.3 parser 417: ADD1(random);
1.1 parser 418:
1.49 misha 419: // ^math:pow(x;y)
1.1 parser 420: ADD2(pow);
421:
1.49 misha 422: // ^math:crypt[password;salt]
1.19 paf 423: ADD2(crypt);
1.26 paf 424:
1.49 misha 425: // ^math:md5[string]
1.26 paf 426: ADD1(md5);
1.5 parser 427:
1.49 misha 428: // ^math:sha1[string]
429: ADD1(sha1);
430:
431: // ^math:crc32[string]
1.43 misha 432: ADD1(crc32);
433:
1.49 misha 434: // ^math:uuid[]
1.29 paf 435: ADD0(uuid);
436:
1.49 misha 437: // ^math:uid64[]
1.30 paf 438: ADD0(uid64);
1.57 misha 439:
440: // ^math:convert[number](base-from;base-to)
441: add_native_method("convert", Method::CT_STATIC, _convert, 3, 3);
1.1 parser 442: }
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