/* * 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 # if !(defined(PERL_VERSION) || (SUBVERSION > 0 && defined(PATCHLEVEL))) # include # 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);