Comment générer des identités aléatoires?

Question

Je suis à la recherche de la façon la plus simple de générer identicons aléatoire sans égard à l'information comme un e-mail de l'utilisateur ou l'adresse IP, etc.

Answer 1

Wikipédia énumère un certain nombre d'implémentations qui permettent ceci:

• http://en.wikipedia.org/wiki/Identicon#Implementations

Vous pouvez graver un appel de bibliothèque avec les données aléatoires de votre choix.

Answer 2

j'ai écrit l'autre jour: http://jsfiddle.net/pHv6W/

Il va générer un hachage hexadécimal aléatoire et afficher une Identicon et un MonsterID de gravatar.com

// Load the MD5 script 
MD5 = makeMD5(); 

seed = randomString(); 

image = document.getElementById('image'); 
image2 = document.getElementById('image2'); 
hash = MD5.hex(seed); 
image.src = 'http://www.gravatar.com/avatar/'+hash+'?d=identicon&s=150'; 
image2.src = 'http://www.gravatar.com/avatar/'+hash+'?d=monsterid&s=150'; 

function randomString(length) { 
    var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz'.split(''); 

    if (! length) { 
     length = Math.floor(Math.random() * chars.length); 
    } 

    var str = ''; 
    for (var i = 0; i < length; i++) { 
     str += chars[Math.floor(Math.random() * chars.length)]; 
    } 
    return str; 
} 

/* 
* A JavaScript implementation of the RSA Data Security, Inc. MD5 Message 
* Digest Algorithm, as defined in RFC 1321. 
* Version 2.1 Copyright (C) Paul Johnston 1999 - 2002. 
* Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet 
* Distributed under the BSD License 
* See http://pajhome.org.uk/crypt/md5 for more info. 
*/ 

function makeMD5() { 
/* 
* Calculate the MD5 of an array of little-endian words, and a bit length 
*/ 
function core_md5(x, len) { 
    /* append padding */ 
    x[len >> 5] |= 0x80 << ((len) % 32); 
    x[(((len + 64) >>> 9) << 4) + 14] = len; 

    var a = 1732584193; 
    var b = -271733879; 
    var c = -1732584194; 
    var d = 271733878; 

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

    a = md5_ff(a, b, c, d, x[i+ 0], 7 , -680876936); 
    d = md5_ff(d, a, b, c, x[i+ 1], 12, -389564586); 
    c = md5_ff(c, d, a, b, x[i+ 2], 17, 606105819); 
    b = md5_ff(b, c, d, a, x[i+ 3], 22, -1044525330); 
    a = md5_ff(a, b, c, d, x[i+ 4], 7 , -176418897); 
    d = md5_ff(d, a, b, c, x[i+ 5], 12, 1200080426); 
    c = md5_ff(c, d, a, b, x[i+ 6], 17, -1473231341); 
    b = md5_ff(b, c, d, a, x[i+ 7], 22, -45705983); 
    a = md5_ff(a, b, c, d, x[i+ 8], 7 , 1770035416); 
    d = md5_ff(d, a, b, c, x[i+ 9], 12, -1958414417); 
    c = md5_ff(c, d, a, b, x[i+10], 17, -42063); 
    b = md5_ff(b, c, d, a, x[i+11], 22, -1990404162); 
    a = md5_ff(a, b, c, d, x[i+12], 7 , 1804603682); 
    d = md5_ff(d, a, b, c, x[i+13], 12, -40341101); 
    c = md5_ff(c, d, a, b, x[i+14], 17, -1502002290); 
    b = md5_ff(b, c, d, a, x[i+15], 22, 1236535329); 

    a = md5_gg(a, b, c, d, x[i+ 1], 5 , -165796510); 
    d = md5_gg(d, a, b, c, x[i+ 6], 9 , -1069501632); 
    c = md5_gg(c, d, a, b, x[i+11], 14, 643717713); 
    b = md5_gg(b, c, d, a, x[i+ 0], 20, -373897302); 
    a = md5_gg(a, b, c, d, x[i+ 5], 5 , -701558691); 
    d = md5_gg(d, a, b, c, x[i+10], 9 , 38016083); 
    c = md5_gg(c, d, a, b, x[i+15], 14, -660478335); 
    b = md5_gg(b, c, d, a, x[i+ 4], 20, -405537848); 
    a = md5_gg(a, b, c, d, x[i+ 9], 5 , 568446438); 
    d = md5_gg(d, a, b, c, x[i+14], 9 , -1019803690); 
    c = md5_gg(c, d, a, b, x[i+ 3], 14, -187363961); 
    b = md5_gg(b, c, d, a, x[i+ 8], 20, 1163531501); 
    a = md5_gg(a, b, c, d, x[i+13], 5 , -1444681467); 
    d = md5_gg(d, a, b, c, x[i+ 2], 9 , -51403784); 
    c = md5_gg(c, d, a, b, x[i+ 7], 14, 1735328473); 
    b = md5_gg(b, c, d, a, x[i+12], 20, -1926607734); 

    a = md5_hh(a, b, c, d, x[i+ 5], 4 , -378558); 
    d = md5_hh(d, a, b, c, x[i+ 8], 11, -2022574463); 
    c = md5_hh(c, d, a, b, x[i+11], 16, 1839030562); 
    b = md5_hh(b, c, d, a, x[i+14], 23, -35309556); 
    a = md5_hh(a, b, c, d, x[i+ 1], 4 , -1530992060); 
    d = md5_hh(d, a, b, c, x[i+ 4], 11, 1272893353); 
    c = md5_hh(c, d, a, b, x[i+ 7], 16, -155497632); 
    b = md5_hh(b, c, d, a, x[i+10], 23, -1094730640); 
    a = md5_hh(a, b, c, d, x[i+13], 4 , 681279174); 
    d = md5_hh(d, a, b, c, x[i+ 0], 11, -358537222); 
    c = md5_hh(c, d, a, b, x[i+ 3], 16, -722521979); 
    b = md5_hh(b, c, d, a, x[i+ 6], 23, 76029189); 
    a = md5_hh(a, b, c, d, x[i+ 9], 4 , -640364487); 
    d = md5_hh(d, a, b, c, x[i+12], 11, -421815835); 
    c = md5_hh(c, d, a, b, x[i+15], 16, 530742520); 
    b = md5_hh(b, c, d, a, x[i+ 2], 23, -995338651); 

    a = md5_ii(a, b, c, d, x[i+ 0], 6 , -198630844); 
    d = md5_ii(d, a, b, c, x[i+ 7], 10, 1126891415); 
    c = md5_ii(c, d, a, b, x[i+14], 15, -1416354905); 
    b = md5_ii(b, c, d, a, x[i+ 5], 21, -57434055); 
    a = md5_ii(a, b, c, d, x[i+12], 6 , 1700485571); 
    d = md5_ii(d, a, b, c, x[i+ 3], 10, -1894986606); 
    c = md5_ii(c, d, a, b, x[i+10], 15, -1051523); 
    b = md5_ii(b, c, d, a, x[i+ 1], 21, -2054922799); 
    a = md5_ii(a, b, c, d, x[i+ 8], 6 , 1873313359); 
    d = md5_ii(d, a, b, c, x[i+15], 10, -30611744); 
    c = md5_ii(c, d, a, b, x[i+ 6], 15, -1560198380); 
    b = md5_ii(b, c, d, a, x[i+13], 21, 1309151649); 
    a = md5_ii(a, b, c, d, x[i+ 4], 6 , -145523070); 
    d = md5_ii(d, a, b, c, x[i+11], 10, -1120210379); 
    c = md5_ii(c, d, a, b, x[i+ 2], 15, 718787259); 
    b = md5_ii(b, c, d, a, x[i+ 9], 21, -343485551); 

    a = safe_add(a, olda); 
    b = safe_add(b, oldb); 
    c = safe_add(c, oldc); 
    d = safe_add(d, oldd); 
    } 
    return [a, b, c, d]; 
} 

/* 
* These functions implement the four basic operations the algorithm uses. 
*/ 
function md5_cmn(q, a, b, x, s, t) { 
    return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s),b); 
} 
function md5_ff(a, b, c, d, x, s, t) { 
    return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t); 
} 
function md5_gg(a, b, c, d, x, s, t) { 
    return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t); 
} 
function md5_hh(a, b, c, d, x, s, t) { 
    return md5_cmn(b^c^d, a, b, x, s, t); 
} 
function md5_ii(a, b, c, d, x, s, t) { 
    return md5_cmn(c^(b | (~d)), a, b, x, s, t); 
} 

/* 
* Calculate the HMAC-MD5, of a key and some data 
*/ 
function core_hmac_md5(key, data) { 
    var bkey = str2binl(key); 
    if(bkey.length > 16) bkey = core_md5(bkey, key.length * MD5.chrsz); 

    var ipad = [], opad = []; 
    for(var i = 0; i < 16; i++) { 
    ipad[i] = bkey[i]^0x36363636; 
    opad[i] = bkey[i]^0x5C5C5C5C; 
    } 

    var hash = core_md5(ipad.concat(str2binl(data)), 512 + data.length * MD5.chrsz); 
    return core_md5(opad.concat(hash), 512 + 128); 
} 

/* 
* Add integers, wrapping at 2^32. This uses 16-bit operations internally 
* to work around bugs in some JS interpreters. 
*/ 
function safe_add(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. 
*/ 
function bit_rol(num, cnt) { 
    return (num << cnt) | (num >>> (32 - cnt)); 
} 

/* 
* Convert a string to an array of little-endian words 
* If chrsz is ASCII, characters >255 have their hi-byte silently ignored. 
*/ 
function str2binl(str) { 
    var bin = [], chrsz = MD5.chrsz; 
    var mask = (1 << chrsz) - 1; 
    for(var i = 0; i < str.length * chrsz; i += chrsz) 
    bin[i>>5] |= (str.charCodeAt(i/chrsz) & mask) << (i%32); 
    return bin; 
} 

/* 
* Convert an array of little-endian words to a string 
*/ 
function binl2str(bin) { 
    var str = "", chrsz = MD5.chrsz; 
    var mask = (1 << chrsz) - 1; 
    for(var i = 0; i < bin.length * 32; i += chrsz) 
    str += String.fromCharCode((bin[i>>5] >>> (i % 32)) & mask); 
    return str; 
} 

/* 
* Convert an array of little-endian words to a hex string. 
*/ 
function binl2hex(binarray) { 
    var hex_tab = MD5.hexcase ? "ABCDEF" : "abcdef"; 
    var str = ""; 
    for(var i = 0; i < binarray.length * 4; i++) { 
    str += hex_tab.charAt((binarray[i>>2] >> ((i%4)*8+4)) & 0xF) + 
      hex_tab.charAt((binarray[i>>2] >> ((i%4)*8 )) & 0xF); 
    } 
    return str; 
} 

/* 
* Convert an array of little-endian words to a base-64 string 
*/ 
function binl2b64(binarray) { 
    var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz/"; 
    var str = ""; 
    for(var i = 0; i < binarray.length * 4; i += 3) { 
    var triplet = (((binarray[i >> 2] >> 8 * (i %4)) & 0xFF) << 16) 
       | (((binarray[i+1 >> 2] >> 8 * ((i+1)%4)) & 0xFF) << 8) 
       | ((binarray[i+2 >> 2] >> 8 * ((i+2)%4)) & 0xFF); 
    for(var j = 0; j < 4; j++) { 
     if(i * 8 + j * 6 > binarray.length * 32) str += MD5.b64pad; 
     else str += tab.charAt((triplet >> 6*(3-j)) & 0x3F); 
    } 
    } 
    return str; 
} 

    return { 
/* 
* Configurable variables. You may need to tweak these to be compatible with 
* the server-side, but the defaults work in most cases. 
*/ 
    hexcase: 0, // hex output format. 0 - lowercase; 1 - uppercase 
    b64pad: "", // base-64 pad character. "=" for strict RFC compliance 
    chrsz: 8, // bits per input character. 8 - ASCII; 16 - Unicode 

/* 
* These are the functions you'll usually want to call 
* They take string arguments and return either hex or base-64 encoded strings 
*/ 
    hex:function(s) { 
     return binl2hex(core_md5(str2binl(s), s.length * MD5.chrsz)); 
    }, 

    base64:function(s) { 
     return binl2b64(core_md5(str2binl(s), s.length * MD5.chrsz)); 
    }, 

    string:function(s) { 
     return binl2str(core_md5(str2binl(s), s.length * MD5.chrsz)); 
    }, 

    hmac:{ 
     hex:function(key, data) { 
     return binl2hex(core_hmac_md5(key, data)); 
     }, 

     base64:function(key, data) { 
     return binl2b64(core_hmac_md5(key, data)); 
     }, 

     string:function(key, data) { 
     return binl2str(core_hmac_md5(key, data)); 
     } 
    }, 

    test:function() { // Perform a simple self-test to see if the VM is working 
     return this.hex("abc") == "900150983cd24fb0d6963f7d28e17f72"; 
    } 
    }; 
} 

Answer 3

J'ai fait un plugin jQuery pour résoudre ce problème : Vous avez juste besoin de fournir la valeur de hachage.

Démo: http://francisshanahan.com/identicon5/test.html

jQuery Page: http://plugins.jquery.com/project/identicon5

Projet Page: http://francisshanahan.com/index.php/identicon5