/* $Id: MD5.xs,v 1.42 2003/12/06 22:35:16 gisle Exp $ */ /* * This library is free software; you can redistribute it and/or * modify it under the same terms as Perl itself. * * Copyright 1998-2000 Gisle Aas. * Copyright 1995-1996 Neil Winton. * Copyright 1991-1992 RSA Data Security, Inc. * * This code is derived from Neil Winton's MD5-1.7 Perl module, which in * turn is derived from the reference implementation in RFC 1321 which * comes with this message: * * Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All * rights reserved. * * License to copy and use this software is granted provided that it * is identified as the "RSA Data Security, Inc. MD5 Message-Digest * Algorithm" in all material mentioning or referencing this software * or this function. * * License is also granted to make and use derivative works provided * that such works are identified as "derived from the RSA Data * Security, Inc. MD5 Message-Digest Algorithm" in all material * mentioning or referencing the derived work. * * 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 #define PERL_NO_GET_CONTEXT /* we want efficiency */ #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 #ifndef dTHX #define pTHX_ #define aTHX_ #endif /* Perl does not guarantee that U32 is exactly 32 bits. Some system * has no integral type with exactly 32 bits. For instance, A Cray has * short, int and long all at 64 bits so we need to apply this macro * to reduce U32 values to 32 bits at appropriate places. If U32 * really does have 32 bits then this is a no-op. */ #if BYTEORDER > 0x4321 || defined(TRUNCATE_U32) #define TO32(x) ((x) & 0xFFFFffff) #define TRUNC32(x) ((x) &= 0xFFFFffff) #else #define TO32(x) (x) #define TRUNC32(x) /*nothing*/ #endif /* The MD5 algorithm is defined in terms of little endian 32-bit * values. The following macros (and functions) allow us to convert * between native integers and such values. */ #undef BYTESWAP #ifndef U32_ALIGNMENT_REQUIRED #if BYTEORDER == 0x1234 /* 32-bit little endian */ #define BYTESWAP(x) (x) /* no-op */ #elif BYTEORDER == 0x4321 /* 32-bit big endian */ #define BYTESWAP(x) ((((x)&0xFF)<<24) \ |(((x)>>24)&0xFF) \ |(((x)&0x0000FF00)<<8) \ |(((x)&0x00FF0000)>>8) ) #endif #endif #ifndef BYTESWAP static void u2s(U32 u, U8* s) { *s++ = (U8)(u & 0xFF); *s++ = (U8)((u >> 8) & 0xFF); *s++ = (U8)((u >> 16) & 0xFF); *s = (U8)((u >> 24) & 0xFF); } #define s2u(s,u) ((u) = (U32)(*s) | \ ((U32)(*(s+1)) << 8) | \ ((U32)(*(s+2)) << 16) | \ ((U32)(*(s+3)) << 24)) #endif #define MD5_CTX_SIGNATURE 200003165 /* This stucture keeps the current state of algorithm. */ typedef struct { U32 signature; /* safer cast in get_md5_ctx() */ U32 A, B, C, D; /* current digest */ U32 bytes_low; /* counts bytes in message */ U32 bytes_high; /* turn it into a 64-bit counter */ U8 buffer[128]; /* collect complete 64 byte blocks */ } MD5_CTX; /* Padding is added at the end of the message in order to fill a * complete 64 byte block (- 8 bytes for the message length). The * padding is also the reason the buffer in MD5_CTX have to be * 128 bytes. */ static const unsigned char PADDING[64] = { 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; /* Constants for MD5Transform routine. */ #define S11 7 #define S12 12 #define S13 17 #define S14 22 #define S21 5 #define S22 9 #define S23 14 #define S24 20 #define S31 4 #define S32 11 #define S33 16 #define S34 23 #define S41 6 #define S42 10 #define S43 15 #define S44 21 /* F, G, H and I are basic MD5 functions. */ #define F(x, y, z) ((((x) & ((y) ^ (z))) ^ (z))) #define G(x, y, z) F(z, x, y) #define H(x, y, z) ((x) ^ (y) ^ (z)) #define I(x, y, z) ((y) ^ ((x) | (~z))) /* ROTATE_LEFT rotates x left n bits. */ #define ROTATE_LEFT(x, n) (((x) << (n) | ((x) >> (32-(n))))) /* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4. * Rotation is separate from addition to prevent recomputation. */ #define FF(a, b, c, d, s, ac) \ (a) += F ((b), (c), (d)) + (NEXTx) + (U32)(ac); \ TRUNC32((a)); \ (a) = ROTATE_LEFT ((a), (s)); \ (a) += (b); \ TRUNC32((a)); #define GG(a, b, c, d, x, s, ac) \ (a) += G ((b), (c), (d)) + X[x] + (U32)(ac); \ TRUNC32((a)); \ (a) = ROTATE_LEFT ((a), (s)); \ (a) += (b); \ TRUNC32((a)); #define HH(a, b, c, d, x, s, ac) \ (a) += H ((b), (c), (d)) + X[x] + (U32)(ac); \ TRUNC32((a)); \ (a) = ROTATE_LEFT ((a), (s)); \ (a) += (b); \ TRUNC32((a)); #define II(a, b, c, d, x, s, ac) \ (a) += I ((b), (c), (d)) + X[x] + (U32)(ac); \ TRUNC32((a)); \ (a) = ROTATE_LEFT ((a), (s)); \ (a) += (b); \ TRUNC32((a)); static void MD5Init(MD5_CTX *ctx) { /* Start state */ ctx->A = 0x67452301; ctx->B = 0xefcdab89; ctx->C = 0x98badcfe; ctx->D = 0x10325476; /* message length */ ctx->bytes_low = ctx->bytes_high = 0; } static void MD5Transform(MD5_CTX* ctx, const U8* buf, STRLEN blocks) { #ifdef MD5_DEBUG static int tcount = 0; #endif U32 A = ctx->A; U32 B = ctx->B; U32 C = ctx->C; U32 D = ctx->D; #ifndef U32_ALIGNMENT_REQUIRED const U32 *x = (U32*)buf; /* really just type casting */ #endif do { U32 a = A; U32 b = B; U32 c = C; U32 d = D; #if BYTEORDER == 0x1234 && !defined(U32_ALIGNMENT_REQUIRED) const U32 *X = x; #define NEXTx (*x++) #else U32 X[16]; /* converted values, used in round 2-4 */ U32 *uptr = X; U32 tmp; #ifdef BYTESWAP #define NEXTx (tmp=*x++, *uptr++ = BYTESWAP(tmp)) #else #define NEXTx (s2u(buf,tmp), buf += 4, *uptr++ = tmp) #endif #endif #ifdef MD5_DEBUG if (buf == ctx->buffer) fprintf(stderr,"%5d: Transform ctx->buffer", ++tcount); else fprintf(stderr,"%5d: Transform %p (%d)", ++tcount, buf, blocks); { int i; fprintf(stderr,"["); for (i = 0; i < 16; i++) { fprintf(stderr,"%x,", x[i]); } fprintf(stderr,"]\n"); } #endif /* Round 1 */ FF (a, b, c, d, S11, 0xd76aa478); /* 1 */ FF (d, a, b, c, S12, 0xe8c7b756); /* 2 */ FF (c, d, a, b, S13, 0x242070db); /* 3 */ FF (b, c, d, a, S14, 0xc1bdceee); /* 4 */ FF (a, b, c, d, S11, 0xf57c0faf); /* 5 */ FF (d, a, b, c, S12, 0x4787c62a); /* 6 */ FF (c, d, a, b, S13, 0xa8304613); /* 7 */ FF (b, c, d, a, S14, 0xfd469501); /* 8 */ FF (a, b, c, d, S11, 0x698098d8); /* 9 */ FF (d, a, b, c, S12, 0x8b44f7af); /* 10 */ FF (c, d, a, b, S13, 0xffff5bb1); /* 11 */ FF (b, c, d, a, S14, 0x895cd7be); /* 12 */ FF (a, b, c, d, S11, 0x6b901122); /* 13 */ FF (d, a, b, c, S12, 0xfd987193); /* 14 */ FF (c, d, a, b, S13, 0xa679438e); /* 15 */ FF (b, c, d, a, S14, 0x49b40821); /* 16 */ /* Round 2 */ GG (a, b, c, d, 1, S21, 0xf61e2562); /* 17 */ GG (d, a, b, c, 6, S22, 0xc040b340); /* 18 */ GG (c, d, a, b, 11, S23, 0x265e5a51); /* 19 */ GG (b, c, d, a, 0, S24, 0xe9b6c7aa); /* 20 */ GG (a, b, c, d, 5, S21, 0xd62f105d); /* 21 */ GG (d, a, b, c, 10, S22, 0x2441453); /* 22 */ GG (c, d, a, b, 15, S23, 0xd8a1e681); /* 23 */ GG (b, c, d, a, 4, S24, 0xe7d3fbc8); /* 24 */ GG (a, b, c, d, 9, S21, 0x21e1cde6); /* 25 */ GG (d, a, b, c, 14, S22, 0xc33707d6); /* 26 */ GG (c, d, a, b, 3, S23, 0xf4d50d87); /* 27 */ GG (b, c, d, a, 8, S24, 0x455a14ed); /* 28 */ GG (a, b, c, d, 13, S21, 0xa9e3e905); /* 29 */ GG (d, a, b, c, 2, S22, 0xfcefa3f8); /* 30 */ GG (c, d, a, b, 7, S23, 0x676f02d9); /* 31 */ GG (b, c, d, a, 12, S24, 0x8d2a4c8a); /* 32 */ /* Round 3 */ HH (a, b, c, d, 5, S31, 0xfffa3942); /* 33 */ HH (d, a, b, c, 8, S32, 0x8771f681); /* 34 */ HH (c, d, a, b, 11, S33, 0x6d9d6122); /* 35 */ HH (b, c, d, a, 14, S34, 0xfde5380c); /* 36 */ HH (a, b, c, d, 1, S31, 0xa4beea44); /* 37 */ HH (d, a, b, c, 4, S32, 0x4bdecfa9); /* 38 */ HH (c, d, a, b, 7, S33, 0xf6bb4b60); /* 39 */ HH (b, c, d, a, 10, S34, 0xbebfbc70); /* 40 */ HH (a, b, c, d, 13, S31, 0x289b7ec6); /* 41 */ HH (d, a, b, c, 0, S32, 0xeaa127fa); /* 42 */ HH (c, d, a, b, 3, S33, 0xd4ef3085); /* 43 */ HH (b, c, d, a, 6, S34, 0x4881d05); /* 44 */ HH (a, b, c, d, 9, S31, 0xd9d4d039); /* 45 */ HH (d, a, b, c, 12, S32, 0xe6db99e5); /* 46 */ HH (c, d, a, b, 15, S33, 0x1fa27cf8); /* 47 */ HH (b, c, d, a, 2, S34, 0xc4ac5665); /* 48 */ /* Round 4 */ II (a, b, c, d, 0, S41, 0xf4292244); /* 49 */ II (d, a, b, c, 7, S42, 0x432aff97); /* 50 */ II (c, d, a, b, 14, S43, 0xab9423a7); /* 51 */ II (b, c, d, a, 5, S44, 0xfc93a039); /* 52 */ II (a, b, c, d, 12, S41, 0x655b59c3); /* 53 */ II (d, a, b, c, 3, S42, 0x8f0ccc92); /* 54 */ II (c, d, a, b, 10, S43, 0xffeff47d); /* 55 */ II (b, c, d, a, 1, S44, 0x85845dd1); /* 56 */ II (a, b, c, d, 8, S41, 0x6fa87e4f); /* 57 */ II (d, a, b, c, 15, S42, 0xfe2ce6e0); /* 58 */ II (c, d, a, b, 6, S43, 0xa3014314); /* 59 */ II (b, c, d, a, 13, S44, 0x4e0811a1); /* 60 */ II (a, b, c, d, 4, S41, 0xf7537e82); /* 61 */ II (d, a, b, c, 11, S42, 0xbd3af235); /* 62 */ II (c, d, a, b, 2, S43, 0x2ad7d2bb); /* 63 */ II (b, c, d, a, 9, S44, 0xeb86d391); /* 64 */ A += a; TRUNC32(A); B += b; TRUNC32(B); C += c; TRUNC32(C); D += d; TRUNC32(D); } while (--blocks); ctx->A = A; ctx->B = B; ctx->C = C; ctx->D = D; } #ifdef MD5_DEBUG static char* ctx_dump(MD5_CTX* ctx) { static char buf[1024]; sprintf(buf, "{A=%x,B=%x,C=%x,D=%x,%d,%d(%d)}", ctx->A, ctx->B, ctx->C, ctx->D, ctx->bytes_low, ctx->bytes_high, (ctx->bytes_low&0x3F)); return buf; } #endif static void MD5Update(MD5_CTX* ctx, const U8* buf, STRLEN len) { STRLEN blocks; STRLEN fill = ctx->bytes_low & 0x3F; #ifdef MD5_DEBUG static int ucount = 0; fprintf(stderr,"%5i: Update(%s, %p, %d)\n", ++ucount, ctx_dump(ctx), buf, len); #endif ctx->bytes_low += len; if (ctx->bytes_low < len) /* wrap around */ ctx->bytes_high++; if (fill) { STRLEN missing = 64 - fill; if (len < missing) { Copy(buf, ctx->buffer + fill, len, U8); return; } Copy(buf, ctx->buffer + fill, missing, U8); MD5Transform(ctx, ctx->buffer, 1); buf += missing; len -= missing; } blocks = len >> 6; if (blocks) MD5Transform(ctx, buf, blocks); if ( (len &= 0x3F)) { Copy(buf + (blocks << 6), ctx->buffer, len, U8); } } static void MD5Final(U8* digest, MD5_CTX *ctx) { STRLEN fill = ctx->bytes_low & 0x3F; STRLEN padlen = (fill < 56 ? 56 : 120) - fill; U32 bits_low, bits_high; #ifdef MD5_DEBUG fprintf(stderr," Final: %s\n", ctx_dump(ctx)); #endif Copy(PADDING, ctx->buffer + fill, padlen, U8); fill += padlen; bits_low = ctx->bytes_low << 3; bits_high = (ctx->bytes_high << 3) | (ctx->bytes_low >> 29); #ifdef BYTESWAP *(U32*)(ctx->buffer + fill) = BYTESWAP(bits_low); fill += 4; *(U32*)(ctx->buffer + fill) = BYTESWAP(bits_high); fill += 4; #else u2s(bits_low, ctx->buffer + fill); fill += 4; u2s(bits_high, ctx->buffer + fill); fill += 4; #endif MD5Transform(ctx, ctx->buffer, fill >> 6); #ifdef MD5_DEBUG fprintf(stderr," Result: %s\n", ctx_dump(ctx)); #endif #ifdef BYTESWAP *(U32*)digest = BYTESWAP(ctx->A); digest += 4; *(U32*)digest = BYTESWAP(ctx->B); digest += 4; *(U32*)digest = BYTESWAP(ctx->C); digest += 4; *(U32*)digest = BYTESWAP(ctx->D); #else u2s(ctx->A, digest); u2s(ctx->B, digest+4); u2s(ctx->C, digest+8); u2s(ctx->D, digest+12); #endif } #ifndef INT2PTR #define INT2PTR(any,d) (any)(d) #endif static MD5_CTX* get_md5_ctx(pTHX_ SV* sv) { if (SvROK(sv)) { sv = SvRV(sv); if (SvIOK(sv)) { MD5_CTX* ctx = INT2PTR(MD5_CTX*, SvIV(sv)); if (ctx && ctx->signature == MD5_CTX_SIGNATURE) { return ctx; } } } croak("Not a reference to a Digest::MD5 object"); return (MD5_CTX*)0; /* some compilers insist on a return value */ } static char* hex_16(const unsigned char* from, char* to) { static const 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 const 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(pTHX_ 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::MD5 PACKAGE = Digest::MD5 PROTOTYPES: DISABLE void new(xclass) SV* xclass PREINIT: MD5_CTX* context; PPCODE: if (!SvROK(xclass)) { STRLEN my_na; char *sclass = SvPV(xclass, my_na); New(55, context, 1, MD5_CTX); context->signature = MD5_CTX_SIGNATURE; ST(0) = sv_newmortal(); sv_setref_pv(ST(0), sclass, (void*)context); SvREADONLY_on(SvRV(ST(0))); } else { context = get_md5_ctx(aTHX_ xclass); } MD5Init(context); XSRETURN(1); void clone(self) SV* self PREINIT: MD5_CTX* cont = get_md5_ctx(aTHX_ self); char *myname = sv_reftype(SvRV(self),TRUE); MD5_CTX* context; PPCODE: STRLEN my_na; New(55, context, 1, MD5_CTX); ST(0) = sv_newmortal(); sv_setref_pv(ST(0), myname , (void*)context); SvREADONLY_on(SvRV(ST(0))); memcpy(context,cont,sizeof(MD5_CTX)); XSRETURN(1); void DESTROY(context) MD5_CTX* context CODE: Safefree(context); void add(self, ...) SV* self PREINIT: MD5_CTX* context = get_md5_ctx(aTHX_ self); int i; unsigned char *data; STRLEN len; PPCODE: for (i = 1; i < items; i++) { data = (unsigned char *)(SvPVbyte(ST(i), len)); MD5Update(context, data, len); } XSRETURN(1); /* self */ void addfile(self, fh) SV* self InputStream fh PREINIT: MD5_CTX* context = get_md5_ctx(aTHX_ self); STRLEN fill = context->bytes_low & 0x3F; #ifdef USE_HEAP_INSTEAD_OF_STACK unsigned char* buffer; #else unsigned char buffer[4096]; #endif int n; CODE: if (fh) { #ifdef USE_HEAP_INSTEAD_OF_STACK New(0, buffer, 4096, unsigned char); assert(buffer); #endif if (fill) { /* The MD5Update() function is faster if it can work with * complete blocks. This will fill up any buffered block * first. */ STRLEN missing = 64 - fill; if ( (n = PerlIO_read(fh, buffer, missing)) > 0) MD5Update(context, buffer, n); else XSRETURN(1); /* self */ } /* Process blocks until EOF or error */ while ( (n = PerlIO_read(fh, buffer, sizeof(buffer))) > 0) { MD5Update(context, buffer, n); } #ifdef USE_HEAP_INSTEAD_OF_STACK Safefree(buffer); #endif if (PerlIO_error(fh)) { croak("Reading from filehandle failed"); } } else { croak("No filehandle passed"); } XSRETURN(1); /* self */ void digest(context) MD5_CTX* context ALIAS: Digest::MD5::digest = F_BIN Digest::MD5::hexdigest = F_HEX Digest::MD5::b64digest = F_B64 PREINIT: unsigned char digeststr[16]; PPCODE: MD5Final(digeststr, context); MD5Init(context); /* In case it is reused */ ST(0) = make_mortal_sv(aTHX_ digeststr, ix); XSRETURN(1); void md5(...) ALIAS: Digest::MD5::md5 = F_BIN Digest::MD5::md5_hex = F_HEX Digest::MD5::md5_base64 = F_B64 PREINIT: MD5_CTX ctx; int i; unsigned char *data; STRLEN len; unsigned char digeststr[16]; PPCODE: MD5Init(&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::MD5")) 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::MD5", data, 11)) { msg = "probably called as class method"; } } if (msg) { char *f = (ix == F_BIN) ? "md5" : (ix == F_HEX) ? "md5_hex" : "md5_base64"; warn("&Digest::MD5::%s function %s", f, msg); } } for (i = 0; i < items; i++) { data = (unsigned char *)(SvPVbyte(ST(i), len)); MD5Update(&ctx, data, len); } MD5Final(digeststr, &ctx); ST(0) = make_mortal_sv(aTHX_ digeststr, ix); XSRETURN(1);