MD5类库(hex_md5)

最新推荐文章于 2024-07-22 11:25:50 发布

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最新推荐文章于 2024-07-22 11:25:50 发布

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文章标签： c# python javascript ViewUI

原文链接：http://www.cnblogs.com/CaptainLin/p/4347375.html

本文介绍了JavaScript中MD5算法的实现，包括核心函数、自我测试及不同编码方式的转换。通过阅读，你可以理解MD5如何对字符串进行哈希运算，并提供hex、base-64等编码结果。

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/* * 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; &