/* * DBSQL uses this code for testing only. It is not a part of * the DBSQL library. This file implements two new TCL commands * "md5" and "md5file" that compute md5 checksums on arbitrary text * and on complete files. These commands are used by the "testfixture" * program to help verify the correct operation of the DBSQL library. * * The original use of these TCL commands was to test the ROLLBACK * feature of DBSQL. First compute the MD5-checksum of the database. * Then make some changes but rollback the changes rather than commit * them. Compute a second MD5-checksum of the file and verify that the * two checksums are the same. Such is the original use of this code. * New uses may have been added since this comment was written. */ /* * This code implements the MD5 message-digest algorithm. * The algorithm is due to Ron Rivest. This code was * written by Colin Plumb in 1993, no copyright is claimed. * This code is in the public domain; do with it what you wish. * * Equivalent code is available from RSA Data Security, Inc. * This code has been tested against that, and is equivalent, * except that you don't need to include two pages of legalese * with every copy. * * To compute the message digest of a chunk of bytes, declare an * MD5Context structure, pass it to MD5Init, call MD5Update as * needed on buffers full of bytes, and then call MD5Final, which * will fill a supplied 16-byte array with the digest. */ #ifndef NO_SYSTEM_INCLUDES #include #endif #include #include #include #include /* The four core functions - F1 is optimized somewhat */ #define F1(x, y, z) (z ^ (x & (y ^ z))) /* F1(x, y, z) (x & y | ~x & z) */ #define F2(x, y, z) F1(z, x, y) #define F3(x, y, z) (x ^ y ^ z) #define F4(x, y, z) (y ^ (x | ~z)) /* This is the central step in the MD5 algorithm. */ #define MD5STEP(f, w, x, y, z, data, s) \ ( w += f(x, y, z) + data, w = w<>(32-s), w += x ) struct Context { u_int32_t buf[4]; u_int32_t bits[2]; unsigned char in[64]; }; typedef char MD5Context[88]; /* * Note: this code is harmless on little-endian machines. */ static void byteReverse(buf, longs) unsigned char *buf; unsigned longs; { u_int32_t t; do { t = (u_int32_t)((unsigned)buf[3] << 8 | buf[2]) << 16 | ((unsigned)buf[1] << 8 | buf[0]); *(u_int32_t *)buf = t; buf += 4; } while (--longs); } /* * The core of the MD5 algorithm, this alters an existing MD5 hash to * reflect the addition of 16 longwords of new data. MD5Update blocks * the data and converts bytes into longwords for this routine. */ static void MD5Transform(buf, in) u_int32_t buf[4]; const u_int32_t in[16]; { register u_int32_t a, b, c, d; a = buf[0]; b = buf[1]; c = buf[2]; d = buf[3]; MD5STEP(F1, a, b, c, d, in[ 0]+0xd76aa478, 7); MD5STEP(F1, d, a, b, c, in[ 1]+0xe8c7b756, 12); MD5STEP(F1, c, d, a, b, in[ 2]+0x242070db, 17); MD5STEP(F1, b, c, d, a, in[ 3]+0xc1bdceee, 22); MD5STEP(F1, a, b, c, d, in[ 4]+0xf57c0faf, 7); MD5STEP(F1, d, a, b, c, in[ 5]+0x4787c62a, 12); MD5STEP(F1, c, d, a, b, in[ 6]+0xa8304613, 17); MD5STEP(F1, b, c, d, a, in[ 7]+0xfd469501, 22); MD5STEP(F1, a, b, c, d, in[ 8]+0x698098d8, 7); MD5STEP(F1, d, a, b, c, in[ 9]+0x8b44f7af, 12); MD5STEP(F1, c, d, a, b, in[10]+0xffff5bb1, 17); MD5STEP(F1, b, c, d, a, in[11]+0x895cd7be, 22); MD5STEP(F1, a, b, c, d, in[12]+0x6b901122, 7); MD5STEP(F1, d, a, b, c, in[13]+0xfd987193, 12); MD5STEP(F1, c, d, a, b, in[14]+0xa679438e, 17); MD5STEP(F1, b, c, d, a, in[15]+0x49b40821, 22); MD5STEP(F2, a, b, c, d, in[ 1]+0xf61e2562, 5); MD5STEP(F2, d, a, b, c, in[ 6]+0xc040b340, 9); MD5STEP(F2, c, d, a, b, in[11]+0x265e5a51, 14); MD5STEP(F2, b, c, d, a, in[ 0]+0xe9b6c7aa, 20); MD5STEP(F2, a, b, c, d, in[ 5]+0xd62f105d, 5); MD5STEP(F2, d, a, b, c, in[10]+0x02441453, 9); MD5STEP(F2, c, d, a, b, in[15]+0xd8a1e681, 14); MD5STEP(F2, b, c, d, a, in[ 4]+0xe7d3fbc8, 20); MD5STEP(F2, a, b, c, d, in[ 9]+0x21e1cde6, 5); MD5STEP(F2, d, a, b, c, in[14]+0xc33707d6, 9); MD5STEP(F2, c, d, a, b, in[ 3]+0xf4d50d87, 14); MD5STEP(F2, b, c, d, a, in[ 8]+0x455a14ed, 20); MD5STEP(F2, a, b, c, d, in[13]+0xa9e3e905, 5); MD5STEP(F2, d, a, b, c, in[ 2]+0xfcefa3f8, 9); MD5STEP(F2, c, d, a, b, in[ 7]+0x676f02d9, 14); MD5STEP(F2, b, c, d, a, in[12]+0x8d2a4c8a, 20); MD5STEP(F3, a, b, c, d, in[ 5]+0xfffa3942, 4); MD5STEP(F3, d, a, b, c, in[ 8]+0x8771f681, 11); MD5STEP(F3, c, d, a, b, in[11]+0x6d9d6122, 16); MD5STEP(F3, b, c, d, a, in[14]+0xfde5380c, 23); MD5STEP(F3, a, b, c, d, in[ 1]+0xa4beea44, 4); MD5STEP(F3, d, a, b, c, in[ 4]+0x4bdecfa9, 11); MD5STEP(F3, c, d, a, b, in[ 7]+0xf6bb4b60, 16); MD5STEP(F3, b, c, d, a, in[10]+0xbebfbc70, 23); MD5STEP(F3, a, b, c, d, in[13]+0x289b7ec6, 4); MD5STEP(F3, d, a, b, c, in[ 0]+0xeaa127fa, 11); MD5STEP(F3, c, d, a, b, in[ 3]+0xd4ef3085, 16); MD5STEP(F3, b, c, d, a, in[ 6]+0x04881d05, 23); MD5STEP(F3, a, b, c, d, in[ 9]+0xd9d4d039, 4); MD5STEP(F3, d, a, b, c, in[12]+0xe6db99e5, 11); MD5STEP(F3, c, d, a, b, in[15]+0x1fa27cf8, 16); MD5STEP(F3, b, c, d, a, in[ 2]+0xc4ac5665, 23); MD5STEP(F4, a, b, c, d, in[ 0]+0xf4292244, 6); MD5STEP(F4, d, a, b, c, in[ 7]+0x432aff97, 10); MD5STEP(F4, c, d, a, b, in[14]+0xab9423a7, 15); MD5STEP(F4, b, c, d, a, in[ 5]+0xfc93a039, 21); MD5STEP(F4, a, b, c, d, in[12]+0x655b59c3, 6); MD5STEP(F4, d, a, b, c, in[ 3]+0x8f0ccc92, 10); MD5STEP(F4, c, d, a, b, in[10]+0xffeff47d, 15); MD5STEP(F4, b, c, d, a, in[ 1]+0x85845dd1, 21); MD5STEP(F4, a, b, c, d, in[ 8]+0x6fa87e4f, 6); MD5STEP(F4, d, a, b, c, in[15]+0xfe2ce6e0, 10); MD5STEP(F4, c, d, a, b, in[ 6]+0xa3014314, 15); MD5STEP(F4, b, c, d, a, in[13]+0x4e0811a1, 21); MD5STEP(F4, a, b, c, d, in[ 4]+0xf7537e82, 6); MD5STEP(F4, d, a, b, c, in[11]+0xbd3af235, 10); MD5STEP(F4, c, d, a, b, in[ 2]+0x2ad7d2bb, 15); MD5STEP(F4, b, c, d, a, in[ 9]+0xeb86d391, 21); buf[0] += a; buf[1] += b; buf[2] += c; buf[3] += d; } /* * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious * initialization constants. */ static void MD5Init(pCtx) MD5Context *pCtx; { struct Context *ctx = (struct Context *)pCtx; ctx->buf[0] = 0x67452301; ctx->buf[1] = 0xefcdab89; ctx->buf[2] = 0x98badcfe; ctx->buf[3] = 0x10325476; ctx->bits[0] = 0; ctx->bits[1] = 0; } /* * Update context to reflect the concatenation of another buffer full * of bytes. */ static void MD5Update(pCtx, buf, len) MD5Context *pCtx; const unsigned char *buf; unsigned int len; { struct Context *ctx = (struct Context *)pCtx; u_int32_t t; /* Update bitcount */ t = ctx->bits[0]; if ((ctx->bits[0] = t + ((u_int32_t)len << 3)) < t) ctx->bits[1]++; /* Carry from low to high */ ctx->bits[1] += len >> 29; t = (t >> 3) & 0x3f; /* Bytes already in shsInfo->data */ /* Handle any leading odd-sized chunks */ if ( t ) { unsigned char *p = (unsigned char *)ctx->in + t; t = 64-t; if (len < t) { memcpy(p, buf, len); return; } memcpy(p, buf, t); byteReverse(ctx->in, 16); MD5Transform(ctx->buf, (u_int32_t *)ctx->in); buf += t; len -= t; } /* Process data in 64-byte chunks */ while (len >= 64) { memcpy(ctx->in, buf, 64); byteReverse(ctx->in, 16); MD5Transform(ctx->buf, (u_int32_t *)ctx->in); buf += 64; len -= 64; } /* Handle any remaining bytes of data. */ memcpy(ctx->in, buf, len); } /* * Final wrapup - pad to 64-byte boundary with the bit pattern * 1 0* (64-bit count of bits processed, MSB-first) */ static void MD5Final(digest, pCtx) unsigned char digest[16]; MD5Context *pCtx; { struct Context *ctx = (struct Context *)pCtx; unsigned count; unsigned char *p; /* Compute number of bytes mod 64 */ count = (ctx->bits[0] >> 3) & 0x3F; /* Set the first char of padding to 0x80. This is safe since there is always at least one byte free */ p = ctx->in + count; *p++ = 0x80; /* Bytes of padding needed to make 64 bytes */ count = 64 - 1 - count; /* Pad out to 56 mod 64 */ if (count < 8) { /* Two lots of padding: Pad the first block to 64 bytes */ memset(p, 0, count); byteReverse(ctx->in, 16); MD5Transform(ctx->buf, (u_int32_t *)ctx->in); /* Now fill the next block with 56 bytes */ memset(ctx->in, 0, 56); } else { /* Pad block to 56 bytes */ memset(p, 0, count-8); } byteReverse(ctx->in, 14); /* Append length in bits and transform */ ((u_int32_t *)ctx->in)[ 14 ] = ctx->bits[0]; ((u_int32_t *)ctx->in)[ 15 ] = ctx->bits[1]; MD5Transform(ctx->buf, (u_int32_t *)ctx->in); byteReverse((unsigned char *)ctx->buf, 4); memcpy(digest, ctx->buf, 16); memset(ctx, 0, sizeof(ctx)); /* In case it's sensitive */ } /* * Convert a digest into base-16. digest should be declared as * "unsigned char digest[16]" in the calling function. The MD5 * digest is stored in the first 16 bytes. zBuf should * be "char zBuf[33]". */ static void DigestToBase16(digest, zBuf) unsigned char *digest; char *zBuf; { static char const zEncode[] = "0123456789abcdef"; int i, j; for(j=i=0; i<16; i++){ int a = digest[i]; zBuf[j++] = zEncode[(a>>4)&0xf]; zBuf[j++] = zEncode[a & 0xf]; } zBuf[j] = 0; } /* * A TCL command for md5. The argument is the text to be hashed. The * Result is the hash in base64. */ static int md5_cmd(cd, interp, argc, argv) void *cd; Tcl_Interp *interp; int argc; const char **argv; { MD5Context ctx; unsigned char digest[16]; if( argc!=2 ){ Tcl_AppendResult(interp,"wrong # args: should be \"", argv[0], " TEXT\"", 0); return TCL_ERROR; } MD5Init(&ctx); MD5Update(&ctx, (unsigned char*)argv[1], (unsigned)strlen(argv[1])); MD5Final(digest, &ctx); DigestToBase16(digest, interp->result); return TCL_OK; } /* * A TCL command to take the md5 hash of a file. The argument is the * name of the file. */ static int md5file_cmd(cd, interp, argc, argv) void *cd; Tcl_Interp *interp; int argc; const char **argv; { FILE *in; MD5Context ctx; unsigned char digest[16]; char zBuf[10240]; if( argc!=2 ){ Tcl_AppendResult(interp,"wrong # args: should be \"", argv[0], " FILENAME\"", 0); return TCL_ERROR; } in = fopen(argv[1],"rb"); if( in==0 ){ Tcl_AppendResult(interp,"unable to open file \"", argv[1], "\" for reading", 0); return TCL_ERROR; } MD5Init(&ctx); for(;;){ int n; n = fread(zBuf, 1, sizeof(zBuf), in); if( n<=0 ) break; MD5Update(&ctx, (unsigned char*)zBuf, (unsigned)n); } fclose(in); MD5Final(digest, &ctx); DigestToBase16(digest, interp->result); return TCL_OK; } /* * Register the two TCL commands above with the TCL interpreter. */ int __testset_MD5_init(interp) Tcl_Interp *interp; { Tcl_CreateCommand(interp, "md5", (Tcl_CmdProc*)md5_cmd, 0, 0); Tcl_CreateCommand(interp, "md5file", (Tcl_CmdProc*)md5file_cmd, 0, 0); return TCL_OK; } /* * During testing, the special md5sum() aggregate function is available. * inside DBSQL. The following routines implement that function. */ void __tcl_sql_func_md5step(context, argc, argv) dbsql_func_t *context; int argc; const char **argv; { MD5Context *p; int i; if( argc<1 ) return; p = dbsql_aggregate_context(context, sizeof(*p)); if( p==0 ) return; if( dbsql_aggregate_count(context)==1 ){ MD5Init(p); } for(i=0; i