/*
Script de verification des reponses du blindtest
Version originale par Dew http://www.estvideo.com/dew/

*/
String.prototype.sans_accents = function() {
 var ch = this.replace(/é|è|ê|ë|É|È|Ê|Ë/g, "e");
 ch = ch.replace(/à|â|ä|À|Â|Ä|Å/g, "a");
 ch = ch.replace(/ç|Ç/g, "c");
 ch = ch.replace(/î|ï/g, "i");
 ch = ch.replace(/ô|ö|Ô|Ö/g, "o");
 ch = ch.replace(/ù|û|ü|Ù|Û|Ü/g, "u");
 return ch;
}

function checkQ(obj,rep) {
	//alert(obj.value.toUpperCase().toLowerCase().sans_accents());
	if(sha1Hash(obj.value.toUpperCase().toLowerCase().sans_accents()) == rep) {
		valid(obj);
	}	else {
		faux(obj);
	}
	
}

function valid(obj) {
		obj.readOnly = true ;
		obj.className = 'blind-valide';
		/*obj.style.border = '2px solid #00ff00';*/
}

function faux(obj) {
	if(obj.value=='') {
		obj.className= 'blind-vide';
		/*obj.style.border = '1px solid #88ABCE';*/
	} else {
		obj.className= 'blind-faux';
		/*obj.style.border = '1px solid #F06600';*/
	}
}

function sha1Hash(msg) {
    var K = [0x5a827999, 0x6ed9eba1, 0x8f1bbcdc, 0xca62c1d6];
    msg += String.fromCharCode(0x80);

    var l = Math.ceil(msg.length/4) + 2;
    var N = Math.ceil(l/16);
    var M = new Array(N);

    for (var i=0; i<N; i++) {
        M[i] = new Array(16);
        for (var j=0; j<16; j++) {
            M[i][j] = (msg.charCodeAt(i*64+j*4)<<24) | (msg.charCodeAt(i*64+j*4+1)<<16) | 
                      (msg.charCodeAt(i*64+j*4+2)<<8) | (msg.charCodeAt(i*64+j*4+3));
        }
    }
    M[N-1][14] = ((msg.length-1) >>> 30) * 8;
    M[N-1][15] = ((msg.length-1)*8) & 0xffffffff;

    var H0 = 0x67452301;
    var H1 = 0xefcdab89;
    var H2 = 0x98badcfe;
    var H3 = 0x10325476;
    var H4 = 0xc3d2e1f0;

    var W = new Array(80); var a, b, c, d, e;
    for (var i=0; i<N; i++) {

        for (var t=0;  t<16; t++) W[t] = M[i][t];
        for (var t=16; t<80; t++) W[t] = ROTL(W[t-3] ^ W[t-8] ^ W[t-14] ^ W[t-16], 1);

        a = H0; b = H1; c = H2; d = H3; e = H4;

        for (var t=0; t<80; t++) {
			var s = Math.floor(t/20);
			var T = (ROTL(a,5) + f(s,b,c,d) + e + K[s] + W[t]) & 0xffffffff;
			e = d;
			d = c;
			c = ROTL(b, 30);
			b = a;
			a = T;
		}
		H0 = (H0+a) & 0xffffffff;
		H1 = (H1+b) & 0xffffffff; 
		H2 = (H2+c) & 0xffffffff; 
		H3 = (H3+d) & 0xffffffff; 
		H4 = (H4+e) & 0xffffffff;
	}
	return H0.toHexStr() + H1.toHexStr() + H2.toHexStr() + H3.toHexStr() + H4.toHexStr();
}

function f(s, x, y, z) 
{
    switch (s) {
    case 0: return (x & y) ^ (~x & z);
    case 1: return x ^ y ^ z;
    case 2: return (x & y) ^ (x & z) ^ (y & z);
    case 3: return x ^ y ^ z;
    }
}

function ROTL(x, n) {
    return (x<<n) | (x>>>(32-n));
}

Number.prototype.toHexStr = function() {
    var s="", v;
    for (var i=7; i>=0; i--) { v = (this>>>(i*4)) & 0xf; s += v.toString(16); }
    return s;
}