/*	copyright www.laRouteDuNet.fr 2007

    MD5 implémentation
    exemple:
    alert(MD5.sign('hello'))

    SHA1 implémentation
    exemple:
    alert(SHA1.sign('hello'))

*/
function MD5(){}
MD5.prototype={
    /*
     * A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
     * Digest Algorithm, as defined in RFC 1321.
     * Copyright (C) Paul Johnston 1999 - 2000.
     * Updated by Greg Holt 2000 - 2001.
     * See http://pajhome.org.uk/site/legal.html for details.
     * json by espace ASP http://www.laRouteDuNet.fr
     */

    /*
     * Convert a 32-bit number to a hex string with ls-byte first
     */
    rhex: function(num)
    {
        var hex_chr = "0123456789abcdef";
        str = "";
        for(j = 0; j <= 3; j++)
            str += hex_chr.charAt((num >> (j * 8 + 4)) & 0x0F) + hex_chr.charAt((num >> (j * 8)) & 0x0F);
        return str;
    },

    /*
     * Convert a string to a sequence of 16-word blocks, stored as an array.
     * Append padding bits and the length, as described in the MD5 standard.
     */
    str2blks_MD5: function(str)
    {
        nblk = ((str.length + 8) >> 6) + 1;
        blks = new Array(nblk * 16);
        for(i = 0; i < nblk * 16; i++) blks[i] = 0;
        for(i = 0; i < str.length; i++)
            blks[i >> 2] |= str.charCodeAt(i) << ((i % 4) * 8);
        blks[i >> 2] |= 0x80 << ((i % 4) * 8);
        blks[nblk * 16 - 2] = str.length * 8;
        return blks;
    },

    /*
     * Add integers, wrapping at 2^32. This uses 16-bit operations internally 
     * to work around bugs in some JS interpreters.
     */
    add: function(x, y)
    {
        var lsw = (x & 0xFFFF) + (y & 0xFFFF);
        var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
        return (msw << 16) | (lsw & 0xFFFF);
    },

    /*
     * Bitwise rotate a 32-bit number to the left
     */
    rol: function(num, cnt)
    {
        return (num << cnt) | (num >>> (32 - cnt));
    },

    /*
     * These functions implement the basic operation for each round of the
     * algorithm.
     */
    cmn: function(q, a, b, x, s, t)
    {
        return this.add(this.rol(this.add(this.add(a, q), this.add(x, t)), s), b);
    },
    ff: function(a, b, c, d, x, s, t)
    {
        return this.cmn((b & c) | ((~b) & d), a, b, x, s, t);
    },
    gg: function(a, b, c, d, x, s, t)
    {
        return this.cmn((b & d) | (c & (~d)), a, b, x, s, t);
    },
    hh: function(a, b, c, d, x, s, t)
    {
        return this.cmn(b ^ c ^ d, a, b, x, s, t);
    },
    ii: function(a, b, c, d, x, s, t)
    {
        return this.cmn(c ^ (b | (~d)), a, b, x, s, t);
    },

    /*
     * Take a string and return the hex representation of its MD5.
     */
    sign: function (str)
    {
        x = this.str2blks_MD5(str);
        a =  1732584193;
        b = -271733879;
        c = -1732584194;
        d =  271733878;

        for(i = 0; i < x.length; i += 16) {
            olda = a;
            oldb = b;
            oldc = c;
            oldd = d;

            a = this.ff(a, b, c, d, x[i+ 0], 7 , -680876936);
            d = this.ff(d, a, b, c, x[i+ 1], 12, -389564586);
            c = this.ff(c, d, a, b, x[i+ 2], 17,  606105819);
            b = this.ff(b, c, d, a, x[i+ 3], 22, -1044525330);
            a = this.ff(a, b, c, d, x[i+ 4], 7 , -176418897);
            d = this.ff(d, a, b, c, x[i+ 5], 12,  1200080426);
            c = this.ff(c, d, a, b, x[i+ 6], 17, -1473231341);
            b = this.ff(b, c, d, a, x[i+ 7], 22, -45705983);
            a = this.ff(a, b, c, d, x[i+ 8], 7 ,  1770035416);
            d = this.ff(d, a, b, c, x[i+ 9], 12, -1958414417);
            c = this.ff(c, d, a, b, x[i+10], 17, -42063);
            b = this.ff(b, c, d, a, x[i+11], 22, -1990404162);
            a = this.ff(a, b, c, d, x[i+12], 7 ,  1804603682);
            d = this.ff(d, a, b, c, x[i+13], 12, -40341101);
            c = this.ff(c, d, a, b, x[i+14], 17, -1502002290);
            b = this.ff(b, c, d, a, x[i+15], 22,  1236535329);    

            a = this.gg(a, b, c, d, x[i+ 1], 5 , -165796510);
            d = this.gg(d, a, b, c, x[i+ 6], 9 , -1069501632);
            c = this.gg(c, d, a, b, x[i+11], 14,  643717713);
            b = this.gg(b, c, d, a, x[i+ 0], 20, -373897302);
            a = this.gg(a, b, c, d, x[i+ 5], 5 , -701558691);
            d = this.gg(d, a, b, c, x[i+10], 9 ,  38016083);
            c = this.gg(c, d, a, b, x[i+15], 14, -660478335);
            b = this.gg(b, c, d, a, x[i+ 4], 20, -405537848);
            a = this.gg(a, b, c, d, x[i+ 9], 5 ,  568446438);
            d = this.gg(d, a, b, c, x[i+14], 9 , -1019803690);
            c = this.gg(c, d, a, b, x[i+ 3], 14, -187363961);
            b = this.gg(b, c, d, a, x[i+ 8], 20,  1163531501);
            a = this.gg(a, b, c, d, x[i+13], 5 , -1444681467);
            d = this.gg(d, a, b, c, x[i+ 2], 9 , -51403784);
            c = this.gg(c, d, a, b, x[i+ 7], 14,  1735328473);
            b = this.gg(b, c, d, a, x[i+12], 20, -1926607734);
            
            a = this.hh(a, b, c, d, x[i+ 5], 4 , -378558);
            d = this.hh(d, a, b, c, x[i+ 8], 11, -2022574463);
            c = this.hh(c, d, a, b, x[i+11], 16,  1839030562);
            b = this.hh(b, c, d, a, x[i+14], 23, -35309556);
            a = this.hh(a, b, c, d, x[i+ 1], 4 , -1530992060);
            d = this.hh(d, a, b, c, x[i+ 4], 11,  1272893353);
            c = this.hh(c, d, a, b, x[i+ 7], 16, -155497632);
            b = this.hh(b, c, d, a, x[i+10], 23, -1094730640);
            a = this.hh(a, b, c, d, x[i+13], 4 ,  681279174);
            d = this.hh(d, a, b, c, x[i+ 0], 11, -358537222);
            c = this.hh(c, d, a, b, x[i+ 3], 16, -722521979);
            b = this.hh(b, c, d, a, x[i+ 6], 23,  76029189);
            a = this.hh(a, b, c, d, x[i+ 9], 4 , -640364487);
            d = this.hh(d, a, b, c, x[i+12], 11, -421815835);
            c = this.hh(c, d, a, b, x[i+15], 16,  530742520);
            b = this.hh(b, c, d, a, x[i+ 2], 23, -995338651);

            a = this.ii(a, b, c, d, x[i+ 0], 6 , -198630844);
            d = this.ii(d, a, b, c, x[i+ 7], 10,  1126891415);
            c = this.ii(c, d, a, b, x[i+14], 15, -1416354905);
            b = this.ii(b, c, d, a, x[i+ 5], 21, -57434055);
            a = this.ii(a, b, c, d, x[i+12], 6 ,  1700485571);
            d = this.ii(d, a, b, c, x[i+ 3], 10, -1894986606);
            c = this.ii(c, d, a, b, x[i+10], 15, -1051523);
            b = this.ii(b, c, d, a, x[i+ 1], 21, -2054922799);
            a = this.ii(a, b, c, d, x[i+ 8], 6 ,  1873313359);
            d = this.ii(d, a, b, c, x[i+15], 10, -30611744);
            c = this.ii(c, d, a, b, x[i+ 6], 15, -1560198380);
            b = this.ii(b, c, d, a, x[i+13], 21,  1309151649);
            a = this.ii(a, b, c, d, x[i+ 4], 6 , -145523070);
            d = this.ii(d, a, b, c, x[i+11], 10, -1120210379);
            c = this.ii(c, d, a, b, x[i+ 2], 15,  718787259);
            b = this.ii(b, c, d, a, x[i+ 9], 21, -343485551);

            a = this.add(a, olda);
            b = this.add(b, oldb);
            c = this.add(c, oldc);
            d = this.add(d, oldd);
        }
        return this.rhex(a) + this.rhex(b) + this.rhex(c) + this.rhex(d);
    }

}
var MD5=new MD5();
/*
    exemple:
    alert(MD5.sign('hello'))
*/


function SHA1(){}
SHA1.prototype={
	rotate_left: function(n,s) {
		var t4 = ( n<<s ) | (n>>>(32-s));
		return t4;
	},
	lsb_hex: function(val) {
		var str='';
		var vh;
		var vl;
		for (var i=0; i<=6; i+=2 ) {
			vh = (val>>>(i*4+4))&0x0f;
			vl = (val>>>(i*4))&0x0f;
			str += vh.toString(16) + vl.toString(16);
		}
		return str;
	},
	cvt_hex: function(val) {
		var str='';
		var v;
		for (var i=7; i>=0; i-- ) {
			v = (val>>>(i*4))&0x0f;
			str += v.toString(16);
		}
		return str;
	},
	Utf8Encode: function(string) {
		string = string.replace(/\r\n/g,"\n");
		var utftext = '';

		for (var n = 0; n < string.length; n++) {
			var c = string.charCodeAt(n);
			if (c < 128) {
				utftext += String.fromCharCode(c);
			}
			else if ((c > 127) && (c < 2048)) {
				utftext += String.fromCharCode((c >> 6) | 192);
				utftext += String.fromCharCode((c & 63) | 128);
			}
			else {
				utftext += String.fromCharCode((c >> 12) | 224);
				utftext += String.fromCharCode(((c >> 6) & 63) | 128);
				utftext += String.fromCharCode((c & 63) | 128);
			}
		}
		return utftext;
	},
	
    /*
     * Take a string and return the hex representation of its SHA1.
     */
	sign: function(str) {
	    var blockstart;
	    var i, j;
	    var W = new Array(80);
	    var H0 = 0x67452301;
	    var H1 = 0xEFCDAB89;
	    var H2 = 0x98BADCFE;
	    var H3 = 0x10325476;
	    var H4 = 0xC3D2E1F0;
	    var A, B, C, D, E;
	    var temp;

	    str = this.Utf8Encode(str);

	    var str_len = str.length;

	    var word_array = new Array();
	    for( i=0; i<str_len-3; i+=4 ) {
		    j = str.charCodeAt(i)<<24 | str.charCodeAt(i+1)<<16 |
		    str.charCodeAt(i+2)<<8 | str.charCodeAt(i+3);
		    word_array.push( j );
	    }

	    switch( str_len % 4 ) {
	    case 0:
		    i = 0x080000000;
		    break;
	    case 1:
		    i = str.charCodeAt(str_len-1)<<24 | 0x0800000;
		    break;
	    case 2:
		    i = str.charCodeAt(str_len-2)<<24 | str.charCodeAt(str_len-1)<<16 | 0x08000;
		    break;
	    case 3:
		    i = str.charCodeAt(str_len-3)<<24 | str.charCodeAt(str_len-2)<<16 | str.charCodeAt(str_len-1)<<8	| 0x80;
		    break;
	    }

	    word_array.push( i );

	    while( (word_array.length % 16) != 14 )
	        word_array.push( 0 );

	    word_array.push( str_len>>>29 );
	    word_array.push( (str_len<<3)&0x0ffffffff );


	    for ( blockstart=0; blockstart<word_array.length; blockstart+=16 ) {

		    for( i=0; i<16; i++ )
		        W[i] = word_array[blockstart+i];
		    for( i=16; i<=79; i++ )
		        W[i] = this.rotate_left(W[i-3] ^ W[i-8] ^ W[i-14] ^ W[i-16], 1);

		    A = H0;
		    B = H1;
		    C = H2;
		    D = H3;
		    E = H4;

		    for( i= 0; i<=19; i++ ) {
			    temp = (this.rotate_left(A,5) + ((B&C) | (~B&D)) + E + W[i] + 0x5A827999) & 0x0ffffffff;
			    E = D;
			    D = C;
			    C = this.rotate_left(B,30);
			    B = A;
			    A = temp;
		    }

		    for( i=20; i<=39; i++ ) {
			    temp = (this.rotate_left(A,5) + (B ^ C ^ D) + E + W[i] + 0x6ED9EBA1) & 0x0ffffffff;
			    E = D;
			    D = C;
			    C = this.rotate_left(B,30);
			    B = A;
			    A = temp;
		    }

		    for( i=40; i<=59; i++ ) {
			    temp = (this.rotate_left(A,5) + ((B&C) | (B&D) | (C&D)) + E + W[i] + 0x8F1BBCDC) & 0x0ffffffff;
			    E = D;
			    D = C;
			    C = this.rotate_left(B,30);
			    B = A;
			    A = temp;
		    }

		    for( i=60; i<=79; i++ ) {
			    temp = (this.rotate_left(A,5) + (B ^ C ^ D) + E + W[i] + 0xCA62C1D6) & 0x0ffffffff;
			    E = D;
			    D = C;
			    C = this.rotate_left(B,30);
			    B = A;
			    A = temp;
		    }

		    H0 = (H0 + A) & 0x0ffffffff;
		    H1 = (H1 + B) & 0x0ffffffff;
		    H2 = (H2 + C) & 0x0ffffffff;
		    H3 = (H3 + D) & 0x0ffffffff;
		    H4 = (H4 + E) & 0x0ffffffff;

	    }

	    var temp = this.cvt_hex(H0) + this.cvt_hex(H1) + this.cvt_hex(H2) + this.cvt_hex(H3) + this.cvt_hex(H4);

	    return temp.toLowerCase();
    }
}

var SHA1=new SHA1();
/*
    exemple:
    alert(SHA1.sign('hello'))
*/