1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459
|
/* $Id: MD2.xs,v 1.3 2003/07/23 06:33:38 gisle Exp $ */
/*
* This library is free software; you can redistribute it and/or
* modify it under the same terms as Perl itself.
*
* Copyright 1998-2003 Gisle Aas.
* Copyright 1990-1992 RSA Data Security, Inc.
*
* This code is derived from the reference implementation in RFC 1231
* which comes with this message:
*
* Copyright (C) 1990-2, RSA Data Security, Inc. Created 1990. All
* rights reserved.
*
* License to copy and use this software is granted for
* non-commercial Internet Privacy-Enhanced Mail provided that it is
* identified as the "RSA Data Security, Inc. MD2 Message Digest
* Algorithm" in all material mentioning or referencing this software
* or this function.
*
* RSA Data Security, Inc. makes no representations concerning either
* the merchantability of this software or the suitability of this
* software for any particular purpose. It is provided "as is"
* without express or implied warranty of any kind.
*
* These notices must be retained in any copies of any part of this
* documentation and/or software.
*/
#ifdef __cplusplus
extern "C" {
#endif
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#ifdef __cplusplus
}
#endif
#ifndef PERL_VERSION
# include <patchlevel.h>
# if !(defined(PERL_VERSION) || (SUBVERSION > 0 && defined(PATCHLEVEL)))
# include <could_not_find_Perl_patchlevel.h>
# endif
# define PERL_REVISION 5
# define PERL_VERSION PATCHLEVEL
# define PERL_SUBVERSION SUBVERSION
#endif
#if PERL_VERSION <= 4 && !defined(PL_dowarn)
#define PL_dowarn dowarn
#endif
#ifdef G_WARN_ON
#define DOWARN (PL_dowarn & G_WARN_ON)
#else
#define DOWARN PL_dowarn
#endif
#ifdef SvPVbyte
#if PERL_REVISION == 5 && PERL_VERSION < 7
/* SvPVbyte does not work in perl-5.6.1, borrowed version for 5.7.3 */
#undef SvPVbyte
#define SvPVbyte(sv, lp) \
((SvFLAGS(sv) & (SVf_POK|SVf_UTF8)) == (SVf_POK) \
? ((lp = SvCUR(sv)), SvPVX(sv)) : my_sv_2pvbyte(aTHX_ sv, &lp))
static char *
my_sv_2pvbyte(pTHX_ register SV *sv, STRLEN *lp)
{
sv_utf8_downgrade(sv,0);
return SvPV(sv,*lp);
}
#endif
#else
#define SvPVbyte SvPV
#endif
typedef struct {
unsigned char state[16]; /* state */
unsigned char checksum[16]; /* checksum */
unsigned int count; /* number of bytes, modulo 16 */
unsigned char buffer[16]; /* input buffer */
} MD2_CTX;
/* Permutation of 0..255 constructed from the digits of pi. It gives a
"random" nonlinear byte substitution operation.
*/
static U8 PI_SUBST[256] = {
41, 46, 67, 201, 162, 216, 124, 1, 61, 54, 84, 161, 236, 240, 6,
19, 98, 167, 5, 243, 192, 199, 115, 140, 152, 147, 43, 217, 188,
76, 130, 202, 30, 155, 87, 60, 253, 212, 224, 22, 103, 66, 111, 24,
138, 23, 229, 18, 190, 78, 196, 214, 218, 158, 222, 73, 160, 251,
245, 142, 187, 47, 238, 122, 169, 104, 121, 145, 21, 178, 7, 63,
148, 194, 16, 137, 11, 34, 95, 33, 128, 127, 93, 154, 90, 144, 50,
39, 53, 62, 204, 231, 191, 247, 151, 3, 255, 25, 48, 179, 72, 165,
181, 209, 215, 94, 146, 42, 172, 86, 170, 198, 79, 184, 56, 210,
150, 164, 125, 182, 118, 252, 107, 226, 156, 116, 4, 241, 69, 157,
112, 89, 100, 113, 135, 32, 134, 91, 207, 101, 230, 45, 168, 2, 27,
96, 37, 173, 174, 176, 185, 246, 28, 70, 97, 105, 52, 64, 126, 15,
85, 71, 163, 35, 221, 81, 175, 58, 195, 92, 249, 206, 186, 197,
234, 38, 44, 83, 13, 110, 133, 40, 132, 9, 211, 223, 205, 244, 65,
129, 77, 82, 106, 220, 55, 200, 108, 193, 171, 250, 36, 225, 123,
8, 12, 189, 177, 74, 120, 136, 149, 139, 227, 99, 232, 109, 233,
203, 213, 254, 59, 0, 29, 57, 242, 239, 183, 14, 102, 88, 208, 228,
166, 119, 114, 248, 235, 117, 75, 10, 49, 68, 80, 180, 143, 237,
31, 26, 219, 153, 141, 51, 159, 17, 131, 20
};
static U8 *PADDING[] = {
(U8 *)"",
(U8 *)"\001",
(U8 *)"\002\002",
(U8 *)"\003\003\003",
(U8 *)"\004\004\004\004",
(U8 *)"\005\005\005\005\005",
(U8 *)"\006\006\006\006\006\006",
(U8 *)"\007\007\007\007\007\007\007",
(U8 *)"\010\010\010\010\010\010\010\010",
(U8 *)"\011\011\011\011\011\011\011\011\011",
(U8 *)"\012\012\012\012\012\012\012\012\012\012",
(U8 *)"\013\013\013\013\013\013\013\013\013\013\013",
(U8 *)"\014\014\014\014\014\014\014\014\014\014\014\014",
(U8 *)"\015\015\015\015\015\015\015\015\015\015\015\015\015",
(U8 *)"\016\016\016\016\016\016\016\016\016\016\016\016\016\016",
(U8 *)"\017\017\017\017\017\017\017\017\017\017\017\017\017\017\017",
(U8 *)"\020\020\020\020\020\020\020\020\020\020\020\020\020\020\020\020"
};
static void
MD2Init(MD2_CTX* context)
{
Zero(context, 1, MD2_CTX);
context->count = 0;
}
static void
MD2Transform (U8* state, U8* checksum, U8* block)
{
unsigned int i, j, t;
U8 x[48];
/* Form encryption block from state, block, state ^ block.
*/
Copy(state, x, 16, char);
Copy(block, x+16, 16, char);
for (i = 0; i < 16; i++)
x[i+32] = state[i] ^ block[i];
/* Encrypt block (18 rounds).
*/
t = 0;
for (i = 0; i < 18; i++) {
for (j = 0; j < 48; j++)
t = x[j] ^= PI_SUBST[t];
t = (t + i) & 0xff;
}
Copy(x, state, 16, char); /* Save new state */
/* Update checksum.
*/
t = checksum[15];
for (i = 0; i < 16; i++)
t = checksum[i] ^= PI_SUBST[block[i] ^ t];
Zero(x, 1, x); /* Zeroize sensitive information. */
}
static void
MD2Update (MD2_CTX* context, U8 *input, STRLEN inputLen)
{
unsigned int i, index, partLen;
/* Update number of bytes mod 16 */
index = context->count;
context->count = (index + inputLen) & 0xf;
partLen = 16 - index;
/* Transform as many times as possible.
*/
if (inputLen >= partLen) {
Copy(input, context->buffer+index, partLen, char);
MD2Transform (context->state, context->checksum, context->buffer);
for (i = partLen; i + 15 < inputLen; i += 16)
MD2Transform (context->state, context->checksum, &input[i]);
index = 0;
}
else
i = 0;
/* Buffer remaining input */
Copy(input+i, context->buffer + index, inputLen-i, char);
}
static void
MD2Final (U8* digest, MD2_CTX *context)
{
unsigned int index, padLen;
/* Pad out to multiple of 16 */
index = context->count;
padLen = 16 - index;
MD2Update (context, PADDING[padLen], padLen);
/* Extend with checksum */
MD2Update (context, context->checksum, 16);
Copy(context->state, digest, 16, char); /* Store state in digest */
Zero(context, 1, MD2_CTX); /* Zeroize sensitive information. */
}
/*----------------------------------------------------------------*/
#ifndef INT2PTR
#define INT2PTR(any,d) (any)(d)
#endif
static MD2_CTX* get_md2_ctx(SV* sv)
{
if (sv_derived_from(sv, "Digest::MD2"))
return INT2PTR(MD2_CTX*, SvIV(SvRV(sv)));
croak("Not a reference to a Digest::MD2 object");
return (MD2_CTX*)0; /* some compilers insist on a return value */
}
static char* hex_16(const unsigned char* from, char* to)
{
static char *hexdigits = "0123456789abcdef";
const unsigned char *end = from + 16;
char *d = to;
while (from < end) {
*d++ = hexdigits[(*from >> 4)];
*d++ = hexdigits[(*from & 0x0F)];
from++;
}
*d = '\0';
return to;
}
static char* base64_16(const unsigned char* from, char* to)
{
static char* base64 =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
const unsigned char *end = from + 16;
unsigned char c1, c2, c3;
char *d = to;
while (1) {
c1 = *from++;
*d++ = base64[c1>>2];
if (from == end) {
*d++ = base64[(c1 & 0x3) << 4];
break;
}
c2 = *from++;
c3 = *from++;
*d++ = base64[((c1 & 0x3) << 4) | ((c2 & 0xF0) >> 4)];
*d++ = base64[((c2 & 0xF) << 2) | ((c3 & 0xC0) >>6)];
*d++ = base64[c3 & 0x3F];
}
*d = '\0';
return to;
}
/* Formats */
#define F_BIN 0
#define F_HEX 1
#define F_B64 2
static SV* make_mortal_sv(const unsigned char *src, int type)
{
STRLEN len;
char result[33];
char *ret;
switch (type) {
case F_BIN:
ret = (char*)src;
len = 16;
break;
case F_HEX:
ret = hex_16(src, result);
len = 32;
break;
case F_B64:
ret = base64_16(src, result);
len = 22;
break;
default:
croak("Bad convertion type (%d)", type);
break;
}
return sv_2mortal(newSVpv(ret,len));
}
/********************************************************************/
typedef PerlIO* InputStream;
MODULE = Digest::MD2 PACKAGE = Digest::MD2
PROTOTYPES: DISABLE
void
new(xclass)
SV* xclass
PREINIT:
MD2_CTX* context;
PPCODE:
if (!SvROK(xclass)) {
STRLEN my_na;
char *sclass = SvPV(xclass, my_na);
New(55, context, 1, MD2_CTX);
ST(0) = sv_newmortal();
sv_setref_pv(ST(0), sclass, (void*)context);
SvREADONLY_on(SvRV(ST(0)));
} else {
context = get_md2_ctx(xclass);
}
MD2Init(context);
XSRETURN(1);
void
clone(self)
SV* self
PREINIT:
MD2_CTX* cont = get_md2_ctx(self);
char *myname = sv_reftype(SvRV(self),TRUE);
MD2_CTX* context;
PPCODE:
STRLEN my_na;
New(55, context, 1, MD2_CTX);
ST(0) = sv_newmortal();
sv_setref_pv(ST(0), myname , (void*)context);
SvREADONLY_on(SvRV(ST(0)));
memcpy(context,cont,sizeof(MD2_CTX));
XSRETURN(1);
void
DESTROY(context)
MD2_CTX* context
CODE:
Safefree(context);
void
add(self, ...)
SV* self
PREINIT:
MD2_CTX* context = get_md2_ctx(self);
int i;
unsigned char *data;
STRLEN len;
PPCODE:
for (i = 1; i < items; i++) {
data = (unsigned char *)(SvPVbyte(ST(i), len));
MD2Update(context, data, len);
}
XSRETURN(1); /* self */
void
addfile(self, fh)
SV* self
InputStream fh
PREINIT:
MD2_CTX* context = get_md2_ctx(self);
unsigned char buffer[4096];
int n;
CODE:
if (fh) {
/* Process blocks until EOF */
while ( (n = PerlIO_read(fh, buffer, sizeof(buffer))) > 0) {
MD2Update(context, buffer, n);
}
if (PerlIO_error(fh)) {
croak("Reading from filehandle failed");
}
}
else {
croak("No filehandle passed");
}
XSRETURN(1); /* self */
void
digest(context)
MD2_CTX* context
ALIAS:
Digest::MD2::digest = F_BIN
Digest::MD2::hexdigest = F_HEX
Digest::MD2::b64digest = F_B64
PREINIT:
unsigned char digeststr[16];
PPCODE:
MD2Final(digeststr, context);
MD2Init(context); /* In case it is reused */
ST(0) = make_mortal_sv(digeststr, ix);
XSRETURN(1);
void
md2(...)
ALIAS:
Digest::MD2::md2 = F_BIN
Digest::MD2::md2_hex = F_HEX
Digest::MD2::md2_base64 = F_B64
PREINIT:
MD2_CTX ctx;
int i;
unsigned char *data;
STRLEN len;
unsigned char digeststr[16];
PPCODE:
MD2Init(&ctx);
if (DOWARN) {
char *msg = 0;
if (items == 1) {
if (SvROK(ST(0))) {
SV* sv = SvRV(ST(0));
if (SvOBJECT(sv) && strEQ(HvNAME(SvSTASH(sv)), "Digest::MD2"))
msg = "probably called as method";
else
msg = "called with reference argument";
}
}
else if (items > 1) {
data = (unsigned char *)SvPVbyte(ST(0), len);
if (len == 11 && memEQ("Digest::MD2", data, 11)) {
msg = "probably called as class method";
}
}
if (msg) {
char *f = (ix == F_BIN) ? "md2" :
(ix == F_HEX) ? "md2_hex" : "md2_base64";
warn("&Digest::MD2::%s function %s", f, msg);
}
}
for (i = 0; i < items; i++) {
data = (unsigned char *)(SvPVbyte(ST(i), len));
MD2Update(&ctx, data, len);
}
MD2Final(digeststr, &ctx);
ST(0) = make_mortal_sv(digeststr, ix);
XSRETURN(1);
|