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SHA1
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// ==ClosureCompiler== | |
// @output_file_name default.js | |
// @compilation_level ADVANCED_OPTIMIZATIONS | |
// ==/ClosureCompiler== | |
/** | |
* | |
* Secure Hash Algorithm (SHA1) | |
* http://www.webtoolkit.info/ | |
* | |
**/ | |
function SHA1 (msg) { | |
function rotate_left(n,s) { | |
var t4 = ( n<<s ) | (n>>>(32-s)); | |
return t4; | |
}; | |
function lsb_hex(val) { | |
var str=""; | |
var i; | |
var vh; | |
var vl; | |
for( 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; | |
}; | |
function cvt_hex(val) { | |
var str=""; | |
var i; | |
var v; | |
for( i=7; i>=0; i-- ) { | |
v = (val>>>(i*4))&0x0f; | |
str += v.toString(16); | |
} | |
return str; | |
}; | |
function Utf8Encode(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; | |
}; | |
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; | |
msg = Utf8Encode(msg); | |
var msg_len = msg.length; | |
var word_array = new Array(); | |
for( i=0; i<msg_len-3; i+=4 ) { | |
j = msg.charCodeAt(i)<<24 | msg.charCodeAt(i+1)<<16 | | |
msg.charCodeAt(i+2)<<8 | msg.charCodeAt(i+3); | |
word_array.push( j ); | |
} | |
switch( msg_len % 4 ) { | |
case 0: | |
i = 0x080000000; | |
break; | |
case 1: | |
i = msg.charCodeAt(msg_len-1)<<24 | 0x0800000; | |
break; | |
case 2: | |
i = msg.charCodeAt(msg_len-2)<<24 | msg.charCodeAt(msg_len-1)<<16 | 0x08000; | |
break; | |
case 3: | |
i = msg.charCodeAt(msg_len-3)<<24 | msg.charCodeAt(msg_len-2)<<16 | msg.charCodeAt(msg_len-1)<<8 | 0x80; | |
break; | |
} | |
word_array.push( i ); | |
while( (word_array.length % 16) != 14 ) word_array.push( 0 ); | |
word_array.push( msg_len>>>29 ); | |
word_array.push( (msg_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] = 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 = (rotate_left(A,5) + ((B&C) | (~B&D)) + E + W[i] + 0x5A827999) & 0x0ffffffff; | |
E = D; | |
D = C; | |
C = rotate_left(B,30); | |
B = A; | |
A = temp; | |
} | |
for( i=20; i<=39; i++ ) { | |
temp = (rotate_left(A,5) + (B ^ C ^ D) + E + W[i] + 0x6ED9EBA1) & 0x0ffffffff; | |
E = D; | |
D = C; | |
C = rotate_left(B,30); | |
B = A; | |
A = temp; | |
} | |
for( i=40; i<=59; i++ ) { | |
temp = (rotate_left(A,5) + ((B&C) | (B&D) | (C&D)) + E + W[i] + 0x8F1BBCDC) & 0x0ffffffff; | |
E = D; | |
D = C; | |
C = rotate_left(B,30); | |
B = A; | |
A = temp; | |
} | |
for( i=60; i<=79; i++ ) { | |
temp = (rotate_left(A,5) + (B ^ C ^ D) + E + W[i] + 0xCA62C1D6) & 0x0ffffffff; | |
E = D; | |
D = C; | |
C = 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; | |
} | |
temp = cvt_hex(H0) + cvt_hex(H1) + cvt_hex(H2) + cvt_hex(H3) + cvt_hex(H4); | |
return temp.toLowerCase(); | |
} | |
window['SHA1']=SHA1; |
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