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1、JS实现的base64加密解密完整实例_ 这篇文章主要介绍了JS实现的base64加密解密,以完整实例形式分析了JavaScript基于base64编码实现加密与解密的具体步骤与相关技巧,并附带了相关的加密解密在线工具地址供大家参考,需要的伴侣可以参考下 本文实例讲解并描述了JS实现的base64加密解密。分享给大家供大家参考，具体如下： 完整的代码： HTML HEAD TITLEBase64/TITLE script language=javascript var base64EncodeChars = ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopq
2、rstuvwxyz0123456789+/; 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
3、, -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); HTML HEAD TITLEBase64/TITLE script language=Java
4、Script 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,
5、-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,
6、 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+); i
7、f(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 +=
8、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 = base64DecodeCharsstr.charCodeAt(i+) 0xff; while(i len c1 = -1); if(
9、c1 = -1) break; /* c2 */ do c2 = base64DecodeCharsstr.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 = base64DecodeCharsc3; while(i len c3 = -1); if(c3 = -1) break; ou
10、t += String.fromCharCode(c2 0XF) 4) | (c3 0x3C) 2); /* c4 */ do c4 = str.charCodeAt(i+) 0xff; if(c4 = 61) return out; c4 = base64DecodeCharsc4; 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 =
11、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
12、(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 ou
13、t += 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 xxxx10xx xxxx10xx xxxx char2 = str.charCodeAt(i+); char3 = str.charCodeAt(i+); out += String.fromCharCode(c 0x0F) 12) | (char2
14、 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) /script /HEAD BODY H1Base64/H1 FORM NAME=f 原码BR TEXTAREA NAME=source ROWS=4 COLS=60 WRAP=soft/TEXTAREABRBR Base64 encodeBR TEXTAREA NAME=output ROWS=4 COLS=60 WRAP=soft/TEXTAREABRBR Base64 decodeBR TEXTAREA NAME=decode ROWS=4 COLS=60 WRAP=soft/TEXTAREABRBR INPUT TYPE=BUTTON VALUE=转换 ONCLICK=doit() /FORM /BODY 盼望本文所述对大家JavaScript程序设计有所关心。 .