JS常用加密编码与算法实例总结
程序员文章站
2023-09-29 09:17:07
本文实例讲述了js常用加密编码与算法。分享给大家供大家参考，具体如下：
一：utf8编码函数
function urlencode(str){
if(str...
本文实例讲述了js常用加密编码与算法。分享给大家供大家参考，具体如下：
一：utf8编码函数
function urlencode(str){
if(str==null||str=="")
return "";
var newstr="";
function tocase(sstr){
return sstr.tostring(16).touppercase();
}
for(var i=0,icode,len=str.length;i<len;i++){
icode=str.charcodeat(i);
if( icode<0x10)
newstr+="%0"+icode.tostring(16).touppercase();
else if(icode<0x80){
if(icode==0x20)
newstr+="+";
else if((icode>=0x30&&icode<=0x39)||(icode>=0x41&&icode<=0x5a)||(icode>=0x61&&icode<=0x7a))
newstr+=str.charat(i);
else
newstr+="%"+tocase(icode);
}
else if(icode<0x800){
newstr+="%"+tocase(0xc0+(icode>>6));
newstr+="%"+tocase(0x80+icode%0x40);
}
else{
newstr+="%"+tocase(0xe0+(icode>>12));
newstr+="%"+tocase(0x80+(icode>>6)%0x40);
newstr+="%"+tocase(0x80+icode%0x40);
}
}
return newstr;
}
二：base64编码,解码函数
var base64encodechars = "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz0123456789+/";
var base64decodechars = new array(
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63,
52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1,
-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1,
-1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1);
function base64encode(str) {
var out, i, len;
var c1, c2, c3;
len = str.length;
i = 0;
out = "";
while(i < len) {
c1 = str.charcodeat(i++) & 0xff;
if(i == len)
{
out += base64encodechars.charat(c1 >> 2);
out += base64encodechars.charat((c1 & 0x3) << 4);
out += "==";
break;
}
c2 = str.charcodeat(i++);
if(i == len)
{
out += base64encodechars.charat(c1 >> 2);
out += base64encodechars.charat(((c1 & 0x3)<< 4) | ((c2 & 0xf0) >> 4));
out += base64encodechars.charat((c2 & 0xf) << 2);
out += "=";
break;
}
c3 = str.charcodeat(i++);
out += base64encodechars.charat(c1 >> 2);
out += base64encodechars.charat(((c1 & 0x3)<< 4) | ((c2 & 0xf0) >> 4));
out += base64encodechars.charat(((c2 & 0xf) << 2) | ((c3 & 0xc0) >>6));
out += base64encodechars.charat(c3 & 0x3f);
}
return out;
}
function base64decode(str) {
var c1, c2, c3, c4;
var i, len, out;
len = str.length;
i = 0;
out = "";
while(i < len) {
/* c1 */
do {
c1 = base64decodechars[str.charcodeat(i++) & 0xff];
} while(i < len && c1 == -1);
if(c1 == -1)
break;
/* c2 */
do {
c2 = base64decodechars[str.charcodeat(i++) & 0xff];
} while(i < len && c2 == -1);
if(c2 == -1)
break;
out += string.fromcharcode((c1 << 2) | ((c2 & 0x30) >> 4));
/* c3 */
do {
c3 = str.charcodeat(i++) & 0xff;
if(c3 == 61)
return out;
c3 = base64decodechars[c3];
} while(i < len && c3 == -1);
if(c3 == -1)
break;
out += string.fromcharcode(((c2 & 0xf) << 4) | ((c3 & 0x3c) >> 2));
/* c4 */
do {
c4 = str.charcodeat(i++) & 0xff;
if(c4 == 61)
return out;
c4 = base64decodechars[c4];
} while(i < len && c4 == -1);
if(c4 == -1)
break;
out += string.fromcharcode(((c3 & 0x03) << 6) | c4);
}
return out;
}
function utf16to8(str) {
var out, i, len, c;
out = "";
len = str.length;
for(i = 0; i < len; i++) {
c = str.charcodeat(i);
if ((c >= 0x0001) && (c <= 0x007f)) {
out += str.charat(i);
} else if (c > 0x07ff) {
out += string.fromcharcode(0xe0 | ((c >> 12) & 0x0f));
out += string.fromcharcode(0x80 | ((c >> 6) & 0x3f));
out += string.fromcharcode(0x80 | ((c >> 0) & 0x3f));
} else {
out += string.fromcharcode(0xc0 | ((c >> 6) & 0x1f));
out += string.fromcharcode(0x80 | ((c >> 0) & 0x3f));
}
}
return out;
}
function utf8to16(str) {
var out, i, len, c;
var char2, char3;
out = "";
len = str.length;
i = 0;
while(i < len) {
c = str.charcodeat(i++);
switch(c >> 4)
{
case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
// 0xxxxxxx
out += str.charat(i-1);
break;
case 12: case 13:
// 110x xxxx 10xx xxxx
char2 = str.charcodeat(i++);
out += string.fromcharcode(((c & 0x1f) << 6) | (char2 & 0x3f));
break;
case 14:
// 1110 xxxx 10xx xxxx 10xx xxxx
char2 = str.charcodeat(i++);
char3 = str.charcodeat(i++);
out += string.fromcharcode(((c & 0x0f) << 12) |
((char2 & 0x3f) << 6) |
((char3 & 0x3f) << 0));
break;
}
}
return out;
}
function doit() {
var f = document.f
f.output.value = base64encode(utf16to8(f.source.value))
f.decode.value = utf8to16(base64decode(f.output.value))
}
三：md5
/*
* 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.
*/
/*
* configurable variables. you may need to tweak these to be compatible with
* the server-side, but the defaults work in most cases.
*/
var hexcase = 0; /* hex output format. 0 - lowercase; 1 - uppercase */
var b64pad = ""; /* base-64 pad character. "=" for strict rfc compliance */
var 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
*/
function hex_md5(s){ return binl2hex(core_md5(str2binl(s), s.length * chrsz));}
function b64_md5(s){ return binl2b64(core_md5(str2binl(s), s.length * chrsz));}
function str_md5(s){ return binl2str(core_md5(str2binl(s), s.length * chrsz));}
function hex_hmac_md5(key, data) { return binl2hex(core_hmac_md5(key, data)); }
function b64_hmac_md5(key, data) { return binl2b64(core_hmac_md5(key, data)); }
function str_hmac_md5(key, data) { return binl2str(core_hmac_md5(key, data)); }
/*
* perform a simple self-test to see if the vm is working
*/
function md5_vm_test()
{
return hex_md5("abc") == "900150983cd24fb0d6963f7d28e17f72";
}
/*
* 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 array(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 * chrsz);
var ipad = array(16), opad = array(16);
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 * 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 = array();
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 = "";
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 = hexcase ? "0123456789abcdef" : "0123456789abcdef";
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 = "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz0123456789+/";
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 += b64pad;
else str += tab.charat((triplet >> 6*(3-j)) & 0x3f);
}
}
return str;
}
md4算法
/*
* a javascript implementation of the rsa data security, inc. md4 message
* digest algorithm, as defined in rfc 1320.
* version 2.1 copyright (c) jerrad pierce, 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.
*/
/*
* configurable variables. you may need to tweak these to be compatible with
* the server-side, but the defaults work in most cases.
*/
var hexcase = 0; /* hex output format. 0 - lowercase; 1 - uppercase */
var b64pad = ""; /* base-64 pad character. "=" for strict rfc compliance */
var chrsz = 8; /* bits per input character. 8 - ascii; 16 - unicode */
/*
* these are the functions you'll usually want to call
*/
function hex_md4(s){ return binl2hex(core_md4(str2binl(s), s.length * chrsz));}
function b64_md4(s){ return binl2b64(core_md4(str2binl(s), s.length * chrsz));}
function str_md4(s){ return binl2str(core_md4(str2binl(s), s.length * chrsz));}
function hex_hmac_md4(key, data) { return binl2hex(core_hmac_md4(key, data)); }
function b64_hmac_md4(key, data) { return binl2b64(core_hmac_md4(key, data)); }
function str_hmac_md4(key, data) { return binl2str(core_hmac_md4(key, data)); }
/*
* perform a simple self-test to see if the vm is working
*/
function md4_vm_test()
{
return hex_md4("abc") == "a448017aaf21d8525fc10ae87aa6729d";
}
/*
* calculate the md4 of an array of little-endian words, and a bit length
*/
function core_md4(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 = md4_ff(a, b, c, d, x[i+ 0], 3 );
d = md4_ff(d, a, b, c, x[i+ 1], 7 );
c = md4_ff(c, d, a, b, x[i+ 2], 11);
b = md4_ff(b, c, d, a, x[i+ 3], 19);
a = md4_ff(a, b, c, d, x[i+ 4], 3 );
d = md4_ff(d, a, b, c, x[i+ 5], 7 );
c = md4_ff(c, d, a, b, x[i+ 6], 11);
b = md4_ff(b, c, d, a, x[i+ 7], 19);
a = md4_ff(a, b, c, d, x[i+ 8], 3 );
d = md4_ff(d, a, b, c, x[i+ 9], 7 );
c = md4_ff(c, d, a, b, x[i+10], 11);
b = md4_ff(b, c, d, a, x[i+11], 19);
a = md4_ff(a, b, c, d, x[i+12], 3 );
d = md4_ff(d, a, b, c, x[i+13], 7 );
c = md4_ff(c, d, a, b, x[i+14], 11);
b = md4_ff(b, c, d, a, x[i+15], 19);
a = md4_gg(a, b, c, d, x[i+ 0], 3 );
d = md4_gg(d, a, b, c, x[i+ 4], 5 );
c = md4_gg(c, d, a, b, x[i+ 8], 9 );
b = md4_gg(b, c, d, a, x[i+12], 13);
a = md4_gg(a, b, c, d, x[i+ 1], 3 );
d = md4_gg(d, a, b, c, x[i+ 5], 5 );
c = md4_gg(c, d, a, b, x[i+ 9], 9 );
b = md4_gg(b, c, d, a, x[i+13], 13);
a = md4_gg(a, b, c, d, x[i+ 2], 3 );
d = md4_gg(d, a, b, c, x[i+ 6], 5 );
c = md4_gg(c, d, a, b, x[i+10], 9 );
b = md4_gg(b, c, d, a, x[i+14], 13);
a = md4_gg(a, b, c, d, x[i+ 3], 3 );
d = md4_gg(d, a, b, c, x[i+ 7], 5 );
c = md4_gg(c, d, a, b, x[i+11], 9 );
b = md4_gg(b, c, d, a, x[i+15], 13);
a = md4_hh(a, b, c, d, x[i+ 0], 3 );
d = md4_hh(d, a, b, c, x[i+ 8], 9 );
c = md4_hh(c, d, a, b, x[i+ 4], 11);
b = md4_hh(b, c, d, a, x[i+12], 15);
a = md4_hh(a, b, c, d, x[i+ 2], 3 );
d = md4_hh(d, a, b, c, x[i+10], 9 );
c = md4_hh(c, d, a, b, x[i+ 6], 11);
b = md4_hh(b, c, d, a, x[i+14], 15);
a = md4_hh(a, b, c, d, x[i+ 1], 3 );
d = md4_hh(d, a, b, c, x[i+ 9], 9 );
c = md4_hh(c, d, a, b, x[i+ 5], 11);
b = md4_hh(b, c, d, a, x[i+13], 15);
a = md4_hh(a, b, c, d, x[i+ 3], 3 );
d = md4_hh(d, a, b, c, x[i+11], 9 );
c = md4_hh(c, d, a, b, x[i+ 7], 11);
b = md4_hh(b, c, d, a, x[i+15], 15);
a = safe_add(a, olda);
b = safe_add(b, oldb);
c = safe_add(c, oldc);
d = safe_add(d, oldd);
}
return array(a, b, c, d);
}
/*
* these functions implement the basic operation for each round of the
* algorithm.
*/
function md4_cmn(q, a, b, x, s, t)
{
return safe_add(rol(safe_add(safe_add(a, q), safe_add(x, t)), s), b);
}
function md4_ff(a, b, c, d, x, s)
{
return md4_cmn((b & c) | ((~b) & d), a, 0, x, s, 0);
}
function md4_gg(a, b, c, d, x, s)
{
return md4_cmn((b & c) | (b & d) | (c & d), a, 0, x, s, 1518500249);
}
function md4_hh(a, b, c, d, x, s)
{
return md4_cmn(b ^ c ^ d, a, 0, x, s, 1859775393);
}
/*
* calculate the hmac-md4, of a key and some data
*/
function core_hmac_md4(key, data)
{
var bkey = str2binl(key);
if(bkey.length > 16) bkey = core_md4(bkey, key.length * chrsz);
var ipad = array(16), opad = array(16);
for(var i = 0; i < 16; i++)
{
ipad[i] = bkey[i] ^ 0x36363636;
opad[i] = bkey[i] ^ 0x5c5c5c5c;
}
var hash = core_md4(ipad.concat(str2binl(data)), 512 + data.length * chrsz);
return core_md4(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 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 = array();
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 = "";
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 = hexcase ? "0123456789abcdef" : "0123456789abcdef";
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 = "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz0123456789+/";
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 += b64pad;
else str += tab.charat((triplet >> 6*(3-j)) & 0x3f);
}
}
return str;
}
sha1算法
/*
* a javascript implementation of the secure hash algorithm, sha-1, as defined
* in fips pub 180-1
* version 2.1a copyright paul johnston 2000 - 2002.
* other contributors: greg holt, andrew kepert, ydnar, lostinet
* distributed under the bsd license
* see http://pajhome.org.uk/crypt/md5 for details.
*/
/*
* configurable variables. you may need to tweak these to be compatible with
* the server-side, but the defaults work in most cases.
*/
var hexcase = 0; /* hex output format. 0 - lowercase; 1 - uppercase */
var b64pad = ""; /* base-64 pad character. "=" for strict rfc compliance */
var 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
*/
function hex_sha1(s){return binb2hex(core_sha1(str2binb(s),s.length * chrsz));}
function b64_sha1(s){return binb2b64(core_sha1(str2binb(s),s.length * chrsz));}
function str_sha1(s){return binb2str(core_sha1(str2binb(s),s.length * chrsz));}
function hex_hmac_sha1(key, data){ return binb2hex(core_hmac_sha1(key, data));}
function b64_hmac_sha1(key, data){ return binb2b64(core_hmac_sha1(key, data));}
function str_hmac_sha1(key, data){ return binb2str(core_hmac_sha1(key, data));}
/*
* perform a simple self-test to see if the vm is working
*/
function sha1_vm_test()
{
return hex_sha1("abc") == "a9993e364706816aba3e25717850c26c9cd0d89d";
}
/*
* calculate the sha-1 of an array of big-endian words, and a bit length
*/
function core_sha1(x, len)
{
/* append padding */
x[len >> 5] |= 0x80 << (24 - len % 32);
x[((len + 64 >> 9) << 4) + 15] = len;
var w = array(80);
var a = 1732584193;
var b = -271733879;
var c = -1732584194;
var d = 271733878;
var e = -1009589776;
for(var i = 0; i < x.length; i += 16)
{
var olda = a;
var oldb = b;
var oldc = c;
var oldd = d;
var olde = e;
for(var j = 0; j < 80; j++)
{
if(j < 16) w[j] = x[i + j];
else w[j] = rol(w[j-3] ^ w[j-8] ^ w[j-14] ^ w[j-16], 1);
var t = safe_add(safe_add(rol(a, 5), sha1_ft(j, b, c, d)),
safe_add(safe_add(e, w[j]), sha1_kt(j)));
e = d;
d = c;
c = rol(b, 30);
b = a;
a = t;
}
a = safe_add(a, olda);
b = safe_add(b, oldb);
c = safe_add(c, oldc);
d = safe_add(d, oldd);
e = safe_add(e, olde);
}
return array(a, b, c, d, e);
}
/*
* perform the appropriate triplet combination function for the current
* iteration
*/
function sha1_ft(t, b, c, d)
{
if(t < 20) return (b & c) | ((~b) & d);
if(t < 40) return b ^ c ^ d;
if(t < 60) return (b & c) | (b & d) | (c & d);
return b ^ c ^ d;
}
/*
* determine the appropriate additive constant for the current iteration
*/
function sha1_kt(t)
{
return (t < 20) ? 1518500249 : (t < 40) ? 1859775393 :
(t < 60) ? -1894007588 : -899497514;
}
/*
* calculate the hmac-sha1 of a key and some data
*/
function core_hmac_sha1(key, data)
{
var bkey = str2binb(key);
if(bkey.length > 16) bkey = core_sha1(bkey, key.length * chrsz);
var ipad = array(16), opad = array(16);
for(var i = 0; i < 16; i++)
{
ipad[i] = bkey[i] ^ 0x36363636;
opad[i] = bkey[i] ^ 0x5c5c5c5c;
}
var hash = core_sha1(ipad.concat(str2binb(data)), 512 + data.length * chrsz);
return core_sha1(opad.concat(hash), 512 + 160);
}
/*
* 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 rol(num, cnt)
{
return (num << cnt) | (num >>> (32 - cnt));
}
/*
* convert an 8-bit or 16-bit string to an array of big-endian words
* in 8-bit function, characters >255 have their hi-byte silently ignored.
*/
function str2binb(str)
{
var bin = array();
var mask = (1 << chrsz) - 1;
for(var i = 0; i < str.length * chrsz; i += chrsz)
bin[i>>5] |= (str.charcodeat(i / chrsz) & mask) << (32 - chrsz - i%32);
return bin;
}
/*
* convert an array of big-endian words to a string
*/
function binb2str(bin)
{
var str = "";
var mask = (1 << chrsz) - 1;
for(var i = 0; i < bin.length * 32; i += chrsz)
str += string.fromcharcode((bin[i>>5] >>> (32 - chrsz - i%32)) & mask);
return str;
}
/*
* convert an array of big-endian words to a hex string.
*/
function binb2hex(binarray)
{
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;
}
/*
* convert an array of big-endian words to a base-64 string
*/
function binb2b64(binarray)
{
var tab = "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz0123456789+/";
var str = "";
for(var i = 0; i < binarray.length * 4; i += 3)
{
var triplet = (((binarray[i >> 2] >> 8 * (3 - i %4)) & 0xff) << 16)
| (((binarray[i+1 >> 2] >> 8 * (3 - (i+1)%4)) & 0xff) << 8 )
| ((binarray[i+2 >> 2] >> 8 * (3 - (i+2)%4)) & 0xff);
for(var j = 0; j < 4; j++)
{
if(i * 8 + j * 6 > binarray.length * 32) str += b64pad;
else str += tab.charat((triplet >> 6*(3-j)) & 0x3f);
}
}
return str;
}
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更多关于javascript相关内容可查看本站专题：《javascript加密解密技巧汇总》、《javascript切换特效与技巧总结》、《javascript查找算法技巧总结》、《javascript动画特效与技巧汇总》、《javascript错误与调试技巧总结》、《javascript数据结构与算法技巧总结》、《javascript遍历算法与技巧总结》及《javascript数学运算用法总结》
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