Difference between revisions of "MD5"
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{{LSLC|Library}}{{LSLC|Examples}} | {{LSLC|Library}}{{LSLC|Examples}} | ||
[[Category: LSL Encryption]] | |||
Revision as of 12:38, 1 January 2008
| LSL Portal | Functions | Events | Types | Operators | Constants | Flow Control | Script Library | Categorized Library | Tutorials |
Preforms a MD5 Hash on the text. Similar to and SHA1 hash, although less secure. Two versions of the function are provided, one for UTF-8 Strings (all strings in LSL are UTF-8) and the other is for Base64 Strings (you need to tell it how many bits long the data is).
There is also an SHA1 & two SHA2 implementations (224 & 256).
View http://en.wikipedia.org/wiki/MD5 for more information.
<lsl>////////////////////////////////////////////////////////////////////////////////////// // // UTF-8 MD5 // Version 1.0 Alpha // ESL Compiled: "Nov 29 2007", "09:02:26" // Copyright (C) 2007 Strife Onizuka // Based on Pseudo-code from http://en.wikipedia.org/wiki/MD5 // // // This library is free software; you can redistribute it and/or // modify it under the terms of the GNU Lesser General Public License // as published by the Free Software Foundation; // version 3 of the License. // // This library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU Lesser General Public License for more details. // // You should have received a copy of the GNU Lesser General Public License // along with this library. If not, see <http://www.gnu.org/licenses/> // or write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, // Boston, MA 02111-1307 USA // //////////////////////////////////////////////////////////////////////////////////////
//===================================================// // Combined Library // // "Nov 29 2007", "09:02:26" // // Copyright (C) 2004-2007, Strife Onizuka (cc-by) // // http://creativecommons.org/licenses/by/3.0/ // //===================================================// //{
//Functions marked "Mono Safe" are safe for use in LSLEditor & Mono //Functions marked "LSO Safe" are safe for use in LSO //Functions marked "Double Safe" are safe for use in VM's that support doubles (Mono, LSLEditor). //Mono is the future VM for LSL, LSO is the current VM of LSL. //To achieve safety, the functions require more bytecode and sacrifice a bit of performance.
string TrimRight(string src, string chrs)//Mono Safe, LSO Safe {
integer i = llStringLength(src); integer j = i; do;while(~llSubStringIndex(chrs, llGetSubString(src, i = (~-(j = i)), i)) && j); return llDeleteSubString(src, j, 0xFFFF);
}
string hexc="0123456789abcdef";
//} Combined Library
list r1 = [7, 12, 17, 22]; list r2 = [5, 9, 14, 20]; list r3 = [4, 11, 16, 23]; list r4 = [6, 10, 15, 21];
list k1 = [
0xd76aa478, 0xe8c7b756, 0x242070db, 0xc1bdceee, 0xf57c0faf, 0x4787c62a, 0xa8304613, 0xfd469501, 0x698098d8, 0x8b44f7af, 0xffff5bb1, 0x895cd7be, 0x6b901122, 0xfd987193, 0xa679438e, 0x49b40821];
list k2 = [
0xf61e2562, 0xc040b340, 0x265e5a51, 0xe9b6c7aa, 0xd62f105d, 0x02441453, 0xd8a1e681, 0xe7d3fbc8, 0x21e1cde6, 0xc33707d6, 0xf4d50d87, 0x455a14ed, 0xa9e3e905, 0xfcefa3f8, 0x676f02d9, 0x8d2a4c8a];
list k3 = [
0xfffa3942, 0x8771f681, 0x6d9d6122, 0xfde5380c, 0xa4beea44, 0x4bdecfa9, 0xf6bb4b60, 0xbebfbc70, 0x289b7ec6, 0xeaa127fa, 0xd4ef3085, 0x04881d05, 0xd9d4d039, 0xe6db99e5, 0x1fa27cf8, 0xc4ac5665];
list k4 = [
0xf4292244, 0x432aff97, 0xab9423a7, 0xfc93a039, 0x655b59c3, 0x8f0ccc92, 0xffeff47d, 0x85845dd1, 0x6fa87e4f, 0xfe2ce6e0, 0xa3014314, 0x4e0811a1, 0xf7537e82, 0xbd3af235, 0x2ad7d2bb, 0xeb86d391];
string UTF8_MD5(string plain) {
integer H1 = 1732584193; integer H2 = -271733879; integer H3 = -1732584194; integer H4 = 271733878;
//OR on the extra bit.
integer j = llStringLength(plain) << 3;
integer b = (~-(((j + 552) & -512) >> 5));
integer T = llBase64ToInteger((TrimRight(llGetSubString(plain = llStringToBase64(plain), -4, -1),"=")) + "AAAA");
string buf = "AAA";
integer i = -5;
do buf += buf; while((i = -~i));
if(j)
{
i = 0x800000;
if(T & 0xFF00)
i = 0x00000080;
else if(T & 0xFF0000)
i = 0x00008000;
}
else
T = 0x80000000;//T is corrupt because of https://jira.secondlife.com/browse/SVC-104
// llOwnerSay(llList2CSV([i,j]));
plain = llGetSubString( llDeleteSubString(plain, -4, -1) +
llGetSubString(llIntegerToBase64(T | i), 0, 5) +
buf, 0, ((b << 4) / 3) - 7) +
llGetSubString(llIntegerToBase64((((j & 0xFF) << 20) | ((j & 0xFF00) << 4) | ((j >> 12) & 0xFF0) | ((j >> 28) & 0xF)) >> ((b % 3) << 1)), 0, 5) +
"AAAAAAAA";
integer S = i = 0;
list x;
do
{
integer A = H1;
integer B = H2;
integer C = H3;
integer D = H4;
j = 0;
x = [];
do
{
T = llBase64ToInteger(buf = llGetSubString(plain, T = ((i + j) << 4) / 3, T+6)) << (S = (((i + j) % 3) << 1));
if(S)
T = T | (llBase64ToInteger("A" + (llDeleteSubString(buf, 0, 1))) >> (6 - S));
x += (T = (((T & 0xFF) << 24) | ((T & 0xFF00) << 8) | ((T >> 8) & 0xFF00) | ((T >> 24) & 0xFF)));
S = A + llList2Integer(k1, j) + T + (D ^ (B & (C ^ D)));
T = llList2Integer(r1, j & 3);
A = D;
D = C;
C = B;
B += (S << T) | ((S >> (32 - T)) & ~(-1 << T));
}
while(16 > (j = -~j));
do
{
S = A + llList2Integer(k2, j & 15) + (C ^ (D & (B ^ C))) + llList2Integer(x, (5 * j + 1) & 15);
T = llList2Integer(r2, j & 3);
A = D;
D = C;
C = B;
B += (S << T) | ((S >> (32 - T)) & ~(-1 << T));
}
while(32 > (j = -~j));
do
{
S = A + llList2Integer(k3, j & 15) + (B ^ C ^ D) + llList2Integer(x, (3 * j + 5) & 15);
T = llList2Integer(r3, j & 3);
A = D;
D = C;
C = B;
B += (S << T) | ((S >> (32 - T)) & ~(-1 << T));
}
while(48 > (j = -~j));
do
{
T = llList2Integer(r4, j & 3);
S = A + llList2Integer(k4, j & 15) + (C ^ (B | (~D))) + llList2Integer(x, (7 * j) & 15);
A = D;
D = C;
C = B;
B += (S << T) | ((S >> (32 - T)) & ~(-1 << T));
}
while(64 > (j = -~j));
// llOwnerSay(llList2CSV(x));
H1 += A;
H2 += B;
H3 += C;
H4 += D;
}while(b > (i += 16));
x = [H4, H3, H2, H1];
i = -4;
buf = "";
do
{
T = llList2Integer(x,i);
j = 32;
do
buf = llGetSubString(hexc, b = ((T >> (j - 4)) & 0xF), b) + llGetSubString(hexc, b = ((T >> (j - 8)) & 0xF), b) + buf;
while ((j -= 8));
}while ((i = -~i));
return buf;
}
string Base64_MD5(string plain, integer bit_length) { //$[E20009]
integer H1 = 1732584193; integer H2 = -271733879; integer H3 = -1732584194; integer H4 = 271733878;
//OR on the extra bit.
integer b = (~-(((bit_length + 552) & -512) >> 5));
integer T = llBase64ToInteger((TrimRight(llGetSubString(plain = llStringToBase64(plain), -4, -1),"=")) + "AAAA");
string buf = "AAA";
integer i = -5;
do buf += buf; while((i = -~i));
if(bit_length)
{
i = 0x800000;
if(T & 0xFF00)
i = 0x00000080;
else if(T & 0xFF0000)
i = 0x00008000;
}
else
T = 0x80000000;//T is corrupt because of https://jira.secondlife.com/browse/SVC-104
// llOwnerSay(llList2CSV([i,j]));
plain = llGetSubString( llDeleteSubString(plain, -4, -1) +
llGetSubString(llIntegerToBase64(T | i), 0, 5) +
buf, 0, ((b << 4) / 3) - 7) +
llGetSubString(llIntegerToBase64((((bit_length & 0xFF) << 20) | ((bit_length & 0xFF00) << 4) | ((bit_length >> 12) & 0xFF0) | ((bit_length >> 28) & 0xF)) >> ((b % 3) << 1)), 0, 5) +
"AAAAAAAA";
integer S = i = 0;
list x;
do
{
integer A = H1;
integer B = H2;
integer C = H3;
integer D = H4;
bit_length = 0;
x = [];
do
{
T = llBase64ToInteger(buf = llGetSubString(plain, T = ((i + bit_length) << 4) / 3, T+6)) << (S = (((i + bit_length) % 3) << 1));
if(S)
T = T | (llBase64ToInteger("A" + (llDeleteSubString(buf, 0, 1))) >> (6 - S));
x += (T = (((T & 0xFF) << 24) | ((T & 0xFF00) << 8) | ((T >> 8) & 0xFF00) | ((T >> 24) & 0xFF)));
S = A + llList2Integer(k1, bit_length) + T + (D ^ (B & (C ^ D)));
T = llList2Integer(r1, bit_length & 3);
A = D;
D = C;
C = B;
B += (S << T) | ((S >> (32 - T)) & ~(-1 << T));
}
while(16 > (bit_length = -~bit_length));
do
{
S = A + llList2Integer(k2, bit_length & 15) + (C ^ (D & (B ^ C))) + llList2Integer(x, (5 * bit_length + 1) & 15);
T = llList2Integer(r2, bit_length & 3);
A = D;
D = C;
C = B;
B += (S << T) | ((S >> (32 - T)) & ~(-1 << T));
}
while(32 > (bit_length = -~bit_length));
do
{
S = A + llList2Integer(k3, bit_length & 15) + (B ^ C ^ D) + llList2Integer(x, (3 * bit_length + 5) & 15);
T = llList2Integer(r3, bit_length & 3);
A = D;
D = C;
C = B;
B += (S << T) | ((S >> (32 - T)) & ~(-1 << T));
}
while(48 > (bit_length = -~bit_length));
do
{
T = llList2Integer(r4, bit_length & 3);
S = A + llList2Integer(k4, bit_length & 15) + (C ^ (B | (~D))) + llList2Integer(x, (7 * bit_length) & 15);
A = D;
D = C;
C = B;
B += (S << T) | ((S >> (32 - T)) & ~(-1 << T));
}
while(64 > (bit_length = -~bit_length));
// llOwnerSay(llList2CSV(x));
H1 += A;
H2 += B;
H3 += C;
H4 += D;
}while(b > (i += 16));
x = [H4, H3, H2, H1];
i = -4;
buf = "";
do
{
T = llList2Integer(x,i);
bit_length = 32;
do
buf = llGetSubString(hexc, b = ((T >> (bit_length - 4)) & 0xF), b) + llGetSubString(hexc, b = ((T >> (bit_length - 8)) & 0xF), b) + buf;
while ((bit_length -= 8));
}while ((i = -~i));
return buf;
}
integer go(string in, string answer) {
llOwnerSay("");
llResetTime();
string out = UTF8_MD5(in);
float t = llGetTime();
llOwnerSay(llDumpList2String(([out,t,llStringLength(in)]),","));
if((answer = llToLower(answer)))
{
llOwnerSay(answer);
return answer == out;
}
return TRUE;
}
integer secret;
default {
state_entry()
{
llListen(0, "", "", "");
llListen(1, "", "", "");
if(go("","D41D8CD98F00B204E9800998ECF8427E"))
if(go("abc","900150983CD24FB0D6963F7D28E17F72"))
go("The quick brown fox jumps over the lazy dog","9E107D9D372BB6826BD81D3542A419D6");
// llOwnerSay((string)llGetTime());
}
listen(integer a, string b, key c, string d)
{
if(a)
secret = (integer)d;
else
{
llOwnerSay(UTF8_MD5(d));
llOwnerSay(UTF8_MD5(d + ":" + (string)secret));
llOwnerSay(llMD5String(d,secret));
}
}
} </lsl>