JavaScript实现的SHA-1加密算法完整实例
网络编程 2021-07-04 21:04www.168986.cn编程入门
这篇文章主要介绍了JavaScript实现的SHA-1加密算法,以完整实例形式分析了SHA-1加密算法的具体实现技巧,需要的朋友可以参考下
本文实例讲述了JavaScript实现的SHA-1加密算法。分享给大家供大家参考,具体如下:
/** * * Secure Hash Algorithm (SHA1) * http://.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; } var temp = cvt_hex(H0) + cvt_hex(H1) + cvt_hex(H2) + cvt_hex(H3) + cvt_hex(H4); return temp.toLowerCase(); }
更多关于JavaScript相关内容感兴趣的读者可查看本站专题:《》及《》
希望本文所述对大家JavaScript程序设计有所帮助。
编程语言
- 机械手焊接机器人编程 机械手焊接设备编程
- vb数据库编程实例,vb做数据库
- tiobe世界编程语言排行榜,全球编程语言排行
- 成都java编程培训 成都it编程培训中心
- 编程基础培训,编程基础知识培训
- flash游戏编程基础教程,flash游戏开发教程
- 不会英语能学编程吗 不会英语可以学程序员吗
- 爱心代码编程C语言 爱心代码编程c语言公式
- c语言编程学习入门 c语言编程快速入门
- 西门子plc编程培训 西门子plc编程培训班
- 哪里可以学编程 台州哪里可以学编程
- 少儿编程哪个好 少儿编程哪个品牌好
- 编程是什么意思,图形编程是什么意思
- c语言编程软件下载,c语言编程软件在哪下载
- java编程软件下载,java编程下载手机版
- ug编程培训学校,ug编程培训教程