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javascript客户端生成MD5值的函数代码

　　测试代码:

　　

<img src="/_New/_cj/myeditor/sysimage/space.gif" class="ewebeditor__script" _ewebeditor_fake_tag="script" _ewebeditor_fake_value="%3Cscript%20language%3Djavascript%3E%20%0D%0A%2F*%20%0D%0A*%20A%20JavaScript%20implementation%20of%20the%20RSA%20Data%20Security%2C%20Inc.%20MD5%20Message%20%0D%0A*%20Digest%20Algorithm%2C%20as%20defined%20in%20RFC%201321.%20%0D%0A*%20Copyright%20(C)%20Paul%20Johnston%201999%20-%202000.%20%0D%0A*%20Updated%20by%20Greg%20Holt%202000%20-%202001.%20%0D%0A*%20See%20http%3A%2F%2Fpajhome.org.uk%2Fsite%2Flegal.html%20for%20details.%20%0D%0A*%2F%20%0D%0Avar%20hex_chr%20%3D%20%220123456789abcdef%22%3B%20%0D%0Afunction%20rhex(num)%20%0D%0A%7B%20%0D%0Astr%20%3D%20%22%22%3B%20%0D%0Afor(j%20%3D%200%3B%20j%20%3C%3D%203%3B%20j%2B%2B)%20%0D%0Astr%20%2B%3D%20hex_chr.charAt((num%20%3E%3E%20(j%20*%208%20%2B%204))%20%26%200x0F)%20%2B%20%0D%0Ahex_chr.charAt((num%20%3E%3E%20(j%20*%208))%20%26%200x0F)%3B%20%0D%0Areturn%20str%3B%20%0D%0A%7D%20%0D%0Afunction%20str2blks_MD5(str)%20%0D%0A%7B%20%0D%0Anblk%20%3D%20((str.length%20%2B%208)%20%3E%3E%206)%20%2B%201%3B%20%0D%0Ablks%20%3D%20new%20Array(nblk%20*%2016)%3B%20%0D%0Afor(i%20%3D%200%3B%20i%20%3C%20nblk%20*%2016%3B%20i%2B%2B)%20blks%5Bi%5D%20%3D%200%3B%20%0D%0Afor(i%20%3D%200%3B%20i%20%3C%20str.length%3B%20i%2B%2B)%20%0D%0Ablks%5Bi%20%3E%3E%202%5D%20%7C%3D%20str.charCodeAt(i)%20%3C%3C%20((i%20%25%204)%20*%208)%3B%20%0D%0Ablks%5Bi%20%3E%3E%202%5D%20%7C%3D%200x80%20%3C%3C%20((i%20%25%204)%20*%208)%3B%20%0D%0Ablks%5Bnblk%20*%2016%20-%202%5D%20%3D%20str.length%20*%208%3B%20%0D%0Areturn%20blks%3B%20%0D%0A%7D%20%0D%0Afunction%20add(x%2C%20y)%20%0D%0A%7B%20%0D%0Avar%20lsw%20%3D%20(x%20%26%200xFFFF)%20%2B%20(y%20%26%200xFFFF)%3B%20%0D%0Avar%20msw%20%3D%20(x%20%3E%3E%2016)%20%2B%20(y%20%3E%3E%2016)%20%2B%20(lsw%20%3E%3E%2016)%3B%20%0D%0Areturn%20(msw%20%3C%3C%2016)%20%7C%20(lsw%20%26%200xFFFF)%3B%20%0D%0A%7D%20%0D%0Afunction%20rol(num%2C%20cnt)%20%0D%0A%7B%20%0D%0Areturn%20(num%20%3C%3C%20cnt)%20%7C%20(num%20%3E%3E%3E%20(32%20-%20cnt))%3B%20%0D%0A%7D%20%0D%0Afunction%20cmn(q%2C%20a%2C%20b%2C%20x%2C%20s%2C%20t)%20%0D%0A%7B%20%0D%0Areturn%20add(rol(add(add(a%2C%20q)%2C%20add(x%2C%20t))%2C%20s)%2C%20b)%3B%20%0D%0A%7D%20%0D%0Afunction%20ff(a%2C%20b%2C%20c%2C%20d%2C%20x%2C%20s%2C%20t)%20%0D%0A%7B%20%0D%0Areturn%20cmn((b%20%26%20c)%20%7C%20((~b)%20%26%20d)%2C%20a%2C%20b%2C%20x%2C%20s%2C%20t)%3B%20%0D%0A%7D%20%0D%0Afunction%20gg(a%2C%20b%2C%20c%2C%20d%2C%20x%2C%20s%2C%20t)%20%0D%0A%7B%20%0D%0Areturn%20cmn((b%20%26%20d)%20%7C%20(c%20%26%20(~d))%2C%20a%2C%20b%2C%20x%2C%20s%2C%20t)%3B%20%0D%0A%7D%20%0D%0Afunction%20hh(a%2C%20b%2C%20c%2C%20d%2C%20x%2C%20s%2C%20t)%20%0D%0A%7B%20%0D%0Areturn%20cmn(b%20%5E%20c%20%5E%20d%2C%20a%2C%20b%2C%20x%2C%20s%2C%20t)%3B%20%0D%0A%7D%20%0D%0Afunction%20ii(a%2C%20b%2C%20c%2C%20d%2C%20x%2C%20s%2C%20t)%20%0D%0A%7B%20%0D%0Areturn%20cmn(c%20%5E%20(b%20%7C%20(~d))%2C%20a%2C%20b%2C%20x%2C%20s%2C%20t)%3B%20%0D%0A%7D%20%0D%0Afunction%20MD5(str)%20%0D%0A%7B%20%0D%0Ax%20%3D%20str2blks_MD5(str)%3B%20%0D%0Avar%20a%20%3D%201732584193%3B%20%0D%0Avar%20b%20%3D%20-271733879%3B%20%0D%0Avar%20c%20%3D%20-1732584194%3B%20%0D%0Avar%20d%20%3D%20271733878%3B%20%0D%0Afor(i%20%3D%200%3B%20i%20%3C%20x.length%3B%20i%20%2B%3D%2016)%20%0D%0A%7B%20%0D%0Avar%20olda%20%3D%20a%3B%20%0D%0Avar%20oldb%20%3D%20b%3B%20%0D%0Avar%20oldc%20%3D%20c%3B%20%0D%0Avar%20oldd%20%3D%20d%3B%20%0D%0Aa%20%3D%20ff(a%2C%20b%2C%20c%2C%20d%2C%20x%5Bi%2B%200%5D%2C%207%20%2C%20-680876936)%3B%20%0D%0Ad%20%3D%20ff(d%2C%20a%2C%20b%2C%20c%2C%20x%5Bi%2B%201%5D%2C%2012%2C%20-389564586)%3B%20%0D%0Ac%20%3D%20ff(c%2C%20d%2C%20a%2C%20b%2C%20x%5Bi%2B%202%5D%2C%2017%2C%20606105819)%3B%20%0D%0Ab%20%3D%20ff(b%2C%20c%2C%20d%2C%20a%2C%20x%5Bi%2B%203%5D%2C%2022%2C%20-1044525330)%3B%20%0D%0Aa%20%3D%20ff(a%2C%20b%2C%20c%2C%20d%2C%20x%5Bi%2B%204%5D%2C%207%20%2C%20-176418897)%3B%20%0D%0Ad%20%3D%20ff(d%2C%20a%2C%20b%2C%20c%2C%20x%5Bi%2B%205%5D%2C%2012%2C%201200080426)%3B%20%0D%0Ac%20%3D%20ff(c%2C%20d%2C%20a%2C%20b%2C%20x%5Bi%2B%206%5D%2C%2017%2C%20-1473231341)%3B%20%0D%0Ab%20%3D%20ff(b%2C%20c%2C%20d%2C%20a%2C%20x%5Bi%2B%207%5D%2C%2022%2C%20-45705983)%3B%20%0D%0Aa%20%3D%20ff(a%2C%20b%2C%20c%2C%20d%2C%20x%5Bi%2B%208%5D%2C%207%20%2C%201770035416)%3B%20%0D%0Ad%20%3D%20ff(d%2C%20a%2C%20b%2C%20c%2C%20x%5Bi%2B%209%5D%2C%2012%2C%20-1958414417)%3B%20%0D%0Ac%20%3D%20ff(c%2C%20d%2C%20a%2C%20b%2C%20x%5Bi%2B10%5D%2C%2017%2C%20-42063)%3B%20%0D%0Ab%20%3D%20ff(b%2C%20c%2C%20d%2C%20a%2C%20x%5Bi%2B11%5D%2C%2022%2C%20-1990404162)%3B%20%0D%0Aa%20%3D%20ff(a%2C%20b%2C%20c%2C%20d%2C%20x%5Bi%2B12%5D%2C%207%20%2C%201804603682)%3B%20%0D%0Ad%20%3D%20ff(d%2C%20a%2C%20b%2C%20c%2C%20x%5Bi%2B13%5D%2C%2012%2C%20-40341101)%3B%20%0D%0Ac%20%3D%20ff(c%2C%20d%2C%20a%2C%20b%2C%20x%5Bi%2B14%5D%2C%2017%2C%20-1502002290)%3B%20%0D%0Ab%20%3D%20ff(b%2C%20c%2C%20d%2C%20a%2C%20x%5Bi%2B15%5D%2C%2022%2C%201236535329)%3B%20%0D%0Aa%20%3D%20gg(a%2C%20b%2C%20c%2C%20d%2C%20x%5Bi%2B%201%5D%2C%205%20%2C%20-165796510)%3B%20%0D%0Ad%20%3D%20gg(d%2C%20a%2C%20b%2C%20c%2C%20x%5Bi%2B%206%5D%2C%209%20%2C%20-1069501632)%3B%20%0D%0Ac%20%3D%20gg(c%2C%20d%2C%20a%2C%20b%2C%20x%5Bi%2B11%5D%2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