X-Git-Url: http://git.cyclocoop.org/?p=velocampus%2Fweb%2Fwww.git;a=blobdiff_plain;f=www%2Fprive%2Fjavascript%2Fsha256.js;fp=www%2Fprive%2Fjavascript%2Fsha256.js;h=a29ec0622a2f93cc4ad59dd908640f7cf66e3577;hp=0000000000000000000000000000000000000000;hb=80b4d3e85f78d402ed2e73f8f5d1bf4c19962eed;hpb=aaf970bf4cdaf76689ecc10609048e18d073820c

diff --git a/www/prive/javascript/sha256.js b/www/prive/javascript/sha256.js
new file mode 100644
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--- /dev/null
+++ b/www/prive/javascript/sha256.js
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+/* A JavaScript implementation of the Secure Hash Algorithm, SHA-256
+ * Version 0.3 Copyright Angel Marin 2003-2004 - http://anmar.eu.org/
+ * Distributed under the BSD License
+ * Some bits taken from Paul Johnston's SHA-1 implementation
+ */
+var chrsz = 8;  /* bits per input character. 8 - ASCII; 16 - Unicode  */
+function safe_add (x, y) {
+  var lsw = (x & 0xFFFF) + (y & 0xFFFF);
+  var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
+  return (msw << 16) | (lsw & 0xFFFF);
+}
+function S (X, n) {return ( X >>> n ) | (X << (32 - n));}
+function R (X, n) {return ( X >>> n );}
+function Ch(x, y, z) {return ((x & y) ^ ((~x) & z));}
+function Maj(x, y, z) {return ((x & y) ^ (x & z) ^ (y & z));}
+function Sigma0256(x) {return (S(x, 2) ^ S(x, 13) ^ S(x, 22));}
+function Sigma1256(x) {return (S(x, 6) ^ S(x, 11) ^ S(x, 25));}
+function Gamma0256(x) {return (S(x, 7) ^ S(x, 18) ^ R(x, 3));}
+function Gamma1256(x) {return (S(x, 17) ^ S(x, 19) ^ R(x, 10));}
+function core_sha256 (m, l) {
+    var K = new Array(0x428A2F98,0x71374491,0xB5C0FBCF,0xE9B5DBA5,0x3956C25B,0x59F111F1,0x923F82A4,0xAB1C5ED5,0xD807AA98,0x12835B01,0x243185BE,0x550C7DC3,0x72BE5D74,0x80DEB1FE,0x9BDC06A7,0xC19BF174,0xE49B69C1,0xEFBE4786,0xFC19DC6,0x240CA1CC,0x2DE92C6F,0x4A7484AA,0x5CB0A9DC,0x76F988DA,0x983E5152,0xA831C66D,0xB00327C8,0xBF597FC7,0xC6E00BF3,0xD5A79147,0x6CA6351,0x14292967,0x27B70A85,0x2E1B2138,0x4D2C6DFC,0x53380D13,0x650A7354,0x766A0ABB,0x81C2C92E,0x92722C85,0xA2BFE8A1,0xA81A664B,0xC24B8B70,0xC76C51A3,0xD192E819,0xD6990624,0xF40E3585,0x106AA070,0x19A4C116,0x1E376C08,0x2748774C,0x34B0BCB5,0x391C0CB3,0x4ED8AA4A,0x5B9CCA4F,0x682E6FF3,0x748F82EE,0x78A5636F,0x84C87814,0x8CC70208,0x90BEFFFA,0xA4506CEB,0xBEF9A3F7,0xC67178F2);
+    var HASH = new Array(0x6A09E667, 0xBB67AE85, 0x3C6EF372, 0xA54FF53A, 0x510E527F, 0x9B05688C, 0x1F83D9AB, 0x5BE0CD19);
+    var W = new Array(64);
+    var a, b, c, d, e, f, g, h, i, j;
+    var T1, T2;
+    /* append padding */
+    m[l >> 5] |= 0x80 << (24 - l % 32);
+    m[((l + 64 >> 9) << 4) + 15] = l;
+    for ( var i = 0; i<m.length; i+=16 ) {
+        a = HASH[0]; b = HASH[1]; c = HASH[2]; d = HASH[3]; e = HASH[4]; f = HASH[5]; g = HASH[6]; h = HASH[7];
+        for ( var j = 0; j<64; j++) {
+            if (j < 16) W[j] = m[j + i];
+            else W[j] = safe_add(safe_add(safe_add(Gamma1256(W[j - 2]), W[j - 7]), Gamma0256(W[j - 15])), W[j - 16]);
+            T1 = safe_add(safe_add(safe_add(safe_add(h, Sigma1256(e)), Ch(e, f, g)), K[j]), W[j]);
+            T2 = safe_add(Sigma0256(a), Maj(a, b, c));
+            h = g; g = f; f = e; e = safe_add(d, T1); d = c; c = b; b = a; a = safe_add(T1, T2);
+        }
+        HASH[0] = safe_add(a, HASH[0]); HASH[1] = safe_add(b, HASH[1]); HASH[2] = safe_add(c, HASH[2]); HASH[3] = safe_add(d, HASH[3]); HASH[4] = safe_add(e, HASH[4]); HASH[5] = safe_add(f, HASH[5]); HASH[6] = safe_add(g, HASH[6]); HASH[7] = safe_add(h, HASH[7]);
+    }
+    return HASH;
+}
+function str2binb (str) {
+  var bin = Array();
+	var i;
+	chrsz=8;
+  for(i = 0; i < str.length; i ++)
+		if (str.charCodeAt(i)>0x7F)
+			chrsz = 16;
+	
+  var mask = (1 << chrsz) - 1;
+  for(i = 0; i < str.length * chrsz; i += chrsz)
+    bin[i>>5] |= (str.charCodeAt(i / chrsz) & mask) << (24 - i%32);
+  return bin;
+}
+function binb2hex (binarray) {
+  var hexcase = 0; /* hex output format. 0 - lowercase; 1 - uppercase */
+  var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
+  var str = "";
+  for (var i = 0; i < binarray.length * 4; i++) {
+    str += hex_tab.charAt((binarray[i>>2] >> ((3 - i%4)*8+4)) & 0xF) + hex_tab.charAt((binarray[i>>2] >> ((3 - i%4)*8  )) & 0xF);
+  }
+  return str;
+}
+function hex_sha256(s){return binb2hex(core_sha256(str2binb(s),s.length * chrsz));}
+/* test if the JS-interpreter is working properly */
+function sha256_self_test(){
+	return hex_sha256("message digest") == "f7846f55cf23e14eebeab5b4e1550cad5b509e3348fbc4efa3a1413d393cb650";
+}