Porting SHA512 Javascript implemention to Actionscript
https://stackoverflow.com/questions/1267873
-
13-09-2019 - |
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I am wondering if anyone can help me in porting a SHA-512 implemention in Javascript to Actionscript. Since both Javascript and Actionscript share the same origin, I think porting it will be easy for people who are used to Actionscript.
The code for sha512 in javascript can be found here:
http://pajhome.org.uk/crypt/md5/sha512.html
Thank you.
Solution
Here is the code ported by me. The code is separated between two files Int64.as and Sha512.as, both of them belong to the com.crypto package.
com/crypto/Int64.as
/*
* Int64 for ActionScript
* Ported by: AAA
* Ported from: See below
*/
/*
* A JavaScript implementation of the Secure Hash Algorithm, SHA-512, as defined
* in FIPS 180-2
* Version 2.2 Copyright Anonymous Contributor, Paul Johnston 2000 - 2009.
* Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
* Distributed under the BSD License
* See http://pajhome.org.uk/crypt/md5 for details.
*/
package com.crypto {
public class Int64 {
public var h;
public var l;
public function Int64(h, l) {
this.h = h;
this.l = l;
}
public function copy(src) {
this.h = src.h;
this.l = src.l;
}
public function rrot(x, shift) {
this.l = (x.l >>> shift) | (x.h << (32-shift));
this.h = (x.h >>> shift) | (x.l << (32-shift));
}
public function revrrot(x, shift) {
this.l = (x.h >>> shift) | (x.l << (32-shift));
this.h = (x.l >>> shift) | (x.h << (32-shift));
}
public function shr(x, shift) {
this.l = (x.l >>> shift) | (x.h << (32-shift));
this.h = (x.h >>> shift);
}
public function add(x, y) {
var w0 = (x.l & 0xffff) + (y.l & 0xffff);
var w1 = (x.l >>> 16) + (y.l >>> 16) + (w0 >>> 16);
var w2 = (x.h & 0xffff) + (y.h & 0xffff) + (w1 >>> 16);
var w3 = (x.h >>> 16) + (y.h >>> 16) + (w2 >>> 16);
this.l = (w0 & 0xffff) | (w1 << 16);
this.h = (w2 & 0xffff) | (w3 << 16);
}
public function add4(a, b, c, d) {
var w0 = (a.l & 0xffff) + (b.l & 0xffff) + (c.l & 0xffff) + (d.l & 0xffff);
var w1 = (a.l >>> 16) + (b.l >>> 16) + (c.l >>> 16) + (d.l >>> 16) + (w0 >>> 16);
var w2 = (a.h & 0xffff) + (b.h & 0xffff) + (c.h & 0xffff) + (d.h & 0xffff) + (w1 >>> 16);
var w3 = (a.h >>> 16) + (b.h >>> 16) + (c.h >>> 16) + (d.h >>> 16) + (w2 >>> 16);
this.l = (w0 & 0xffff) | (w1 << 16);
this.h = (w2 & 0xffff) | (w3 << 16);
}
public function add5(a, b, c, d, e) {
var w0 = (a.l & 0xffff) + (b.l & 0xffff) + (c.l & 0xffff) + (d.l & 0xffff) + (e.l & 0xffff);
var w1 = (a.l >>> 16) + (b.l >>> 16) + (c.l >>> 16) + (d.l >>> 16) + (e.l >>> 16) + (w0 >>> 16);
var w2 = (a.h & 0xffff) + (b.h & 0xffff) + (c.h & 0xffff) + (d.h & 0xffff) + (e.h & 0xffff) + (w1 >>> 16);
var w3 = (a.h >>> 16) + (b.h >>> 16) + (c.h >>> 16) + (d.h >>> 16) + (e.h >>> 16) + (w2 >>> 16);
this.l = (w0 & 0xffff) | (w1 << 16);
this.h = (w2 & 0xffff) | (w3 << 16);
}
}
}
com/crypto/Sha512.as
/*
* SHA-512 for ActionScript
* Ported by: AAA
* Ported from: See below
*/
/*
* A JavaScript implementation of the Secure Hash Algorithm, SHA-512, as defined
* in FIPS 180-2
* Version 2.2 Copyright Anonymous Contributor, Paul Johnston 2000 - 2009.
* Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
* Distributed under the BSD License
* See http://pajhome.org.uk/crypt/md5 for details.
*/
package com.crypto {
public class Sha512 {
public var hexcase = 0;
public var b64pad = "";
public function Sha512() {
}
public function hex_sha512(s) { return rstr2hex(rstr_sha512(str2rstr_utf8(s))); }
public function b64_sha512(s) { return rstr2b64(rstr_sha512(str2rstr_utf8(s))); }
public function any_sha512(s, e) { return rstr2any(rstr_sha512(str2rstr_utf8(s)), e);}
public function hex_hmac_sha512(k, d) { return rstr2hex(rstr_hmac_sha512(str2rstr_utf8(k), str2rstr_utf8(d))); }
public function b64_hmac_sha512(k, d) { return rstr2b64(rstr_hmac_sha512(str2rstr_utf8(k), str2rstr_utf8(d))); }
public function any_hmac_sha512(k, d, e) { return rstr2any(rstr_hmac_sha512(str2rstr_utf8(k), str2rstr_utf8(d)), e);}
public function sha512_vm_test() {
return hex_sha512("abc").toLowerCase() == "ddaf35a193617abacc417349ae20413112e6fa4e89a97ea20a9eeee64b55d39a"
+ "2192992a274fc1a836ba3c23a3feebbd454d4423643ce80e2a9ac94fa54ca49f";
}
private function rstr_sha512(s) {
return binb2rstr(binb_sha512(rstr2binb(s), s.length * 8));
}
private function rstr_hmac_sha512(key, data) {
var bkey = rstr2binb(key);
if(bkey.length > 32) bkey = binb_sha512(bkey, key.length * 8);
var ipad = new Array(32)
var opad = new Array(32);
for(var i = 0; i < 32; i++) {
ipad[i] = bkey[i] ^ 0x36363636;
opad[i] = bkey[i] ^ 0x5C5C5C5C;
}
var hash = binb_sha512(ipad.concat(rstr2binb(data)), 1024 + data.length * 8);
return binb2rstr(binb_sha512(opad.concat(hash), 1024 + 512));
}
private function rstr2hex(input) {
try { hexcase } catch(e) { hexcase=0; }
var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
var output = "";
var x;
for(var i = 0; i < input.length; i++) {
x = input.charCodeAt(i);
output += hex_tab.charAt((x >>> 4) & 0x0F) + hex_tab.charAt(x & 0x0F);
}
return output;
}
private function rstr2b64(input)
{
try { b64pad } catch(e) { b64pad=''; }
var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
var output = "";
var len = input.length;
for(var i = 0; i < len; i += 3) {
var triplet = (input.charCodeAt(i) << 16)
| (i + 1 < len ? input.charCodeAt(i+1) << 8 : 0)
| (i + 2 < len ? input.charCodeAt(i+2) : 0);
for(var j = 0; j < 4; j++) {
if(i * 8 + j * 6 > input.length * 8) output += b64pad;
else output += tab.charAt((triplet >>> 6*(3-j)) & 0x3F);
}
}
return output;
}
private function rstr2any(input, encoding) {
var divisor = encoding.length;
var i, j, q, x, quotient;
var dividend = new Array(Math.ceil(input.length / 2));
for(i = 0; i < dividend.length; i++) {
dividend[i] = (input.charCodeAt(i * 2) << 8) | input.charCodeAt(i * 2 + 1);
}
var full_length = Math.ceil(input.length * 8 / (Math.log(encoding.length) / Math.log(2)));
var remainders = new Array(full_length);
for(j = 0; j < full_length; j++) {
quotient = new Array();
x = 0;
for(i = 0; i < dividend.length; i++) {
x = (x << 16) + dividend[i];
q = Math.floor(x / divisor);
x -= q * divisor;
if(quotient.length > 0 || q > 0)
quotient[quotient.length] = q;
}
remainders[j] = x;
dividend = quotient;
}
var output = "";
for(i = remainders.length - 1; i >= 0; i--)
output += encoding.charAt(remainders[i]);
return output;
}
private function str2rstr_utf8(input) {
var output = "";
var i = -1;
var x, y;
while(++i < input.length) {
x = input.charCodeAt(i);
y = i + 1 < input.length ? input.charCodeAt(i + 1) : 0;
if(0xD800 <= x && x <= 0xDBFF && 0xDC00 <= y && y <= 0xDFFF) {
x = 0x10000 + ((x & 0x03FF) << 10) + (y & 0x03FF);
i++;
}
if(x <= 0x7F)
output += String.fromCharCode(x);
else if(x <= 0x7FF)
output += String.fromCharCode(0xC0 | ((x >>> 6 ) & 0x1F), 0x80 | ( x & 0x3F));
else if(x <= 0xFFFF)
output += String.fromCharCode(0xE0 | ((x >>> 12) & 0x0F),
0x80 | ((x >>> 6 ) & 0x3F),
0x80 | ( x & 0x3F));
else if(x <= 0x1FFFFF)
output += String.fromCharCode(0xF0 | ((x >>> 18) & 0x07),
0x80 | ((x >>> 12) & 0x3F),
0x80 | ((x >>> 6 ) & 0x3F),
0x80 | ( x & 0x3F));
}
return output;
}
private function str2rstr_utf16le(input) {
var output = "";
for(var i = 0; i < input.length; i++)
output += String.fromCharCode( input.charCodeAt(i) & 0xFF,
(input.charCodeAt(i) >>> 8) & 0xFF);
return output;
}
private function str2rstr_utf16be(input) {
var output = "";
for(var i = 0; i < input.length; i++)
output += String.fromCharCode((input.charCodeAt(i) >>> 8) & 0xFF,
input.charCodeAt(i) & 0xFF);
return output;
}
private function rstr2binb(input) {
var output = new Array(input.length >> 2);
for(var i = 0; i < output.length; i++)
output[i] = 0;
for(var i = 0; i < input.length * 8; i += 8)
output[i>>5] |= (input.charCodeAt(i / 8) & 0xFF) << (24 - i % 32);
return output;
}
private function binb2rstr(input) {
var output = "";
for(var i = 0; i < input.length * 32; i += 8)
output += String.fromCharCode((input[i>>5] >>> (24 - i % 32)) & 0xFF);
return output;
}
var sha512_k;
private function binb_sha512(x, len) {
if(sha512_k == undefined) {
sha512_k = new Array(
new Int64(0x428a2f98, -685199838), new Int64(0x71374491, 0x23ef65cd),
new Int64(-1245643825, -330482897), new Int64(-373957723, -2121671748),
new Int64(0x3956c25b, -213338824), new Int64(0x59f111f1, -1241133031),
new Int64(-1841331548, -1357295717), new Int64(-1424204075, -630357736),
new Int64(-670586216, -1560083902), new Int64(0x12835b01, 0x45706fbe),
new Int64(0x243185be, 0x4ee4b28c), new Int64(0x550c7dc3, -704662302),
new Int64(0x72be5d74, -226784913), new Int64(-2132889090, 0x3b1696b1),
new Int64(-1680079193, 0x25c71235), new Int64(-1046744716, -815192428),
new Int64(-459576895, -1628353838), new Int64(-272742522, 0x384f25e3),
new Int64(0xfc19dc6, -1953704523), new Int64(0x240ca1cc, 0x77ac9c65),
new Int64(0x2de92c6f, 0x592b0275), new Int64(0x4a7484aa, 0x6ea6e483),
new Int64(0x5cb0a9dc, -1119749164), new Int64(0x76f988da, -2096016459),
new Int64(-1740746414, -295247957), new Int64(-1473132947, 0x2db43210),
new Int64(-1341970488, -1728372417), new Int64(-1084653625, -1091629340),
new Int64(-958395405, 0x3da88fc2), new Int64(-710438585, -1828018395),
new Int64(0x6ca6351, -536640913), new Int64(0x14292967, 0xa0e6e70),
new Int64(0x27b70a85, 0x46d22ffc), new Int64(0x2e1b2138, 0x5c26c926),
new Int64(0x4d2c6dfc, 0x5ac42aed), new Int64(0x53380d13, -1651133473),
new Int64(0x650a7354, -1951439906), new Int64(0x766a0abb, 0x3c77b2a8),
new Int64(-2117940946, 0x47edaee6), new Int64(-1838011259, 0x1482353b),
new Int64(-1564481375, 0x4cf10364), new Int64(-1474664885, -1136513023),
new Int64(-1035236496, -789014639), new Int64(-949202525, 0x654be30),
new Int64(-778901479, -688958952), new Int64(-694614492, 0x5565a910),
new Int64(-200395387, 0x5771202a), new Int64(0x106aa070, 0x32bbd1b8),
new Int64(0x19a4c116, -1194143544), new Int64(0x1e376c08, 0x5141ab53),
new Int64(0x2748774c, -544281703), new Int64(0x34b0bcb5, -509917016),
new Int64(0x391c0cb3, -976659869), new Int64(0x4ed8aa4a, -482243893),
new Int64(0x5b9cca4f, 0x7763e373), new Int64(0x682e6ff3, -692930397),
new Int64(0x748f82ee, 0x5defb2fc), new Int64(0x78a5636f, 0x43172f60),
new Int64(-2067236844, -1578062990), new Int64(-1933114872, 0x1a6439ec),
new Int64(-1866530822, 0x23631e28), new Int64(-1538233109, -561857047),
new Int64(-1090935817, -1295615723), new Int64(-965641998, -479046869),
new Int64(-903397682, -366583396), new Int64(-779700025, 0x21c0c207),
new Int64(-354779690, -840897762), new Int64(-176337025, -294727304),
new Int64(0x6f067aa, 0x72176fba), new Int64(0xa637dc5, -1563912026),
new Int64(0x113f9804, -1090974290), new Int64(0x1b710b35, 0x131c471b),
new Int64(0x28db77f5, 0x23047d84), new Int64(0x32caab7b, 0x40c72493),
new Int64(0x3c9ebe0a, 0x15c9bebc), new Int64(0x431d67c4, -1676669620),
new Int64(0x4cc5d4be, -885112138), new Int64(0x597f299c, -60457430),
new Int64(0x5fcb6fab, 0x3ad6faec), new Int64(0x6c44198c, 0x4a475817));
}
var H = new Array(
new Int64(0x6a09e667, -205731576),
new Int64(-1150833019, -2067093701),
new Int64(0x3c6ef372, -23791573),
new Int64(-1521486534, 0x5f1d36f1),
new Int64(0x510e527f, -1377402159),
new Int64(-1694144372, 0x2b3e6c1f),
new Int64(0x1f83d9ab, -79577749),
new Int64(0x5be0cd19, 0x137e2179));
var T1 = new Int64(0, 0),
T2 = new Int64(0, 0),
a = new Int64(0,0),
b = new Int64(0,0),
c = new Int64(0,0),
d = new Int64(0,0),
e = new Int64(0,0),
f = new Int64(0,0),
g = new Int64(0,0),
h = new Int64(0,0),
s0 = new Int64(0, 0),
s1 = new Int64(0, 0),
Ch = new Int64(0, 0),
Maj = new Int64(0, 0),
r1 = new Int64(0, 0),
r2 = new Int64(0, 0),
r3 = new Int64(0, 0);
var j, i;
var W = new Array(80);
for(i=0; i<80; i++)
W[i] = new Int64(0, 0);
x[len >> 5] |= 0x80 << (24 - (len & 0x1f));
x[((len + 128 >> 10)<< 5) + 31] = len;
for(i = 0; i<x.length; i+=32) {
a.copy(H[0]);
b.copy(H[1]);
c.copy(H[2]);
d.copy(H[3]);
e.copy(H[4]);
f.copy(H[5]);
g.copy(H[6]);
h.copy(H[7]);
for(j=0; j<16; j++) {
W[j].h = x[i + 2*j];
W[j].l = x[i + 2*j + 1];
}
for(j=16; j<80; j++) {
r1.rrot(W[j-2], 19);
r2.revrrot(W[j-2], 29);
r3.shr(W[j-2], 6);
s1.l = r1.l ^ r2.l ^ r3.l;
s1.h = r1.h ^ r2.h ^ r3.h;
r1.rrot(W[j-15], 1);
r2.rrot(W[j-15], 8);
r3.shr(W[j-15], 7);
s0.l = r1.l ^ r2.l ^ r3.l;
s0.h = r1.h ^ r2.h ^ r3.h;
W[j].add4(s1, W[j-7], s0, W[j-16]);
}
for(j = 0; j < 80; j++) {
Ch.l = (e.l & f.l) ^ (~e.l & g.l);
Ch.h = (e.h & f.h) ^ (~e.h & g.h);
r1.rrot(e, 14);
r2.rrot(e, 18);
r3.revrrot(e, 9);
s1.l = r1.l ^ r2.l ^ r3.l;
s1.h = r1.h ^ r2.h ^ r3.h;
r1.rrot(a, 28);
r2.revrrot(a, 2);
r3.revrrot(a, 7);
s0.l = r1.l ^ r2.l ^ r3.l;
s0.h = r1.h ^ r2.h ^ r3.h;
Maj.l = (a.l & b.l) ^ (a.l & c.l) ^ (b.l & c.l);
Maj.h = (a.h & b.h) ^ (a.h & c.h) ^ (b.h & c.h);
T1.add5(h, s1, Ch, sha512_k[j], W[j]);
T2.add(s0, Maj);
h.copy(g);
g.copy(f);
f.copy(e);
e.add(d, T1);
d.copy(c);
c.copy(b);
b.copy(a);
a.add(T1, T2);
}
H[0].add(H[0], a);
H[1].add(H[1], b);
H[2].add(H[2], c);
H[3].add(H[3], d);
H[4].add(H[4], e);
H[5].add(H[5], f);
H[6].add(H[6], g);
H[7].add(H[7], h);
}
var hash = new Array(16);
for(i=0; i<8; i++) {
hash[2*i] = H[i].h;
hash[2*i + 1] = H[i].l;
}
return hash;
}
}
}
Sorry, I could not find a proper place to upload them.
OTHER TIPS
I am not able to post a comment on the above (where this should be), but there is an error with some signatures using this code due to Actionscript's imaginative behaviour when appending the null character to a string (it doesn't).
For a quick and dirty fix to the hex encoded hmac which is what I am using, I changed the hex_hmac_sha512 function (just for the encoding it calls) and added a binb2hex function as follows:
private function hex_hmac_sha512(key, data) {
key = str2rstr_utf8(key);
data = str2rstr_utf8(data);
var bkey = rstr2binb(key);
if(bkey.length > 32) bkey = binb_sha512(bkey, key.length * 8);
var ipad = new Array(32)
var opad = new Array(32);
for(var i = 0; i < 32; i++) {
ipad[i] = bkey[i] ^ 0x36363636;
opad[i] = bkey[i] ^ 0x5C5C5C5C;
}
var hash = binb_sha512(ipad.concat(rstr2binb(data)), 1024 + data.length * 8);
return binb2hex(binb_sha512(opad.concat(hash), 1024 + 512));
}
private function binb2hex(input) {
var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
var output = "";
for(var i = 0; i < input.length * 32; i += 8){
var schar = (input[i>>5] >>> (24 - i % 32)) & 0xFF;
output += hex_tab.charAt((schar >>> 4) & 0x0F) + hex_tab.charAt(schar & 0x0F);
}
return output;
}
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