md5 | 易学教程

How to calculate md5 checksum of blob using CryptoJS

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问题 Uploading file in chunks using Blob API. Here I want to check the md5 checksum of the blob. When I tried the below code it is working fine for text files, but it is returning different value for binary files. var reader = new FileReader(); reader.readAsBinaryString(blob); reader.onloadend = function () { var mdsum = CryptoJS.MD5(reader.result); console.log("MD5 Checksum",mdsum.toString()); }; How to calculate the md5 checksum of blob correctly for all types of files ? 回答1: Use the following

How secure is MD5 and SHA1

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问题 Hey just a simple questions, as im tryng to understand a bit more on Hash functions, I know how they work and what they do but how secure are they? I would appreciate a simple answer not links as I never find them useful. 回答1: With nowadays technology, both can be cracked. There are also hash dictionaries that help find what a hash means for short strings. If they are secure or not, highly depends on what you want to protect. If you are building an online banking system, they are not

Is MD5 guaranteed to be available for use with MessageDigest in Android?

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问题 I want to know if the MD5 digest algorithm is guaranteed to be available in all Android devices before I bluntly ignore the checked exception that MessageDigest.getInstance("MD5") can throw. 回答1: The Android JCE (Java Cryptography Extension) is based off the bouncycastle implementation but stripped down. bouncycastle provides a ton of different MessageDigests which can be found here. There's no guarantee that every Android device supports MD5 but it's extremely common and is likely to be on

MD5加密

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前言：这是我项目中运用到的地方，希望能帮到大家。 MD5.js地址 http://xiazai.sogou.com/detail/34/16/-883576791258902919.html?e=1970 进去下载，链接到网页中 <script type="text/javascript" src="md5.js" ></script> MD5的用法 hex_md5（document.getElementById("text").value）； MD5的用处 MD5也可以应用在对密码得加密，那么加密后有什么作用呢？和加密前有什么区别呢？ 1.因为是不可逆的，所以在数据库里面看到的密码是无用的，你不是检验用户的密码，而是检验用户输入的密码经md5加密以后和数据库内的是否相符 2.你不希望你的邮件服务器的管理员知道你的信用卡密码吧？ MD5在线测试地址 http://www.cmd5.com/ MD5案列： body： <input type="text" id="text" /> <input type="button" value="点击" id="aaa" /> <div id="result"></div> js $(document).on("click","#aaa",function(){ var hash=hex_md5(document.getElementById(

How do I calculate the MD5 checksum of a file contents in Python?

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问题 the scenario is: I have generated md5 checksum for the pdf file which stored on the server using the following code: def createMd5Hash(self, file_path, pdf_title, pdf_author): md5_returned = None try: md5 = hashlib.md5() with open(file_path, 'rb') as file_to_check: for chunk in file_to_check: md5.update(chunk) md5_file = md5.hexdigest() custom_key = 'xyzkey-{}'.format(md5_file) md5.update(custom_key.encode()) md5_returned = md5.hexdigest() except Exception as e: print("Error while calculate

c# get md5 hash of an embedded resource before extracting it

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问题 We have an embedded resource and need to get the md5 hash of the file before extracting it in order to know if it is different from an already existing file, (becouse if we have to extract it to compare them it would be better to replace the file directly) Any suggestion is appreciated 回答1: What sort of embedded resource is it? If it's one you get hold of using Assembly.GetManifestResourceStream() , then the simplest approach is: using (Stream stream = Assembly.GetManifestResourceStream(...))

c# get md5 hash of an embedded resource before extracting it

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Trying to reproduce PHP's pack(“H*”) function in C#

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问题 this is my code in C# : public static String MD5Encrypt(String str, Boolean raw_output=false) { // Use input string to calculate MD5 hash String output; MD5 md5 = System.Security.Cryptography.MD5.Create(); byte[] inputBytes = System.Text.Encoding.ASCII.GetBytes(str); byte[] hashBytes = md5.ComputeHash(inputBytes); // Convert the byte array to hexadecimal string StringBuilder sb = new StringBuilder(); for (int i = 0; i < hashBytes.Length; i++) { sb.Append(hashBytes[i].ToString("x2")); } output

What is FreeBSD MD5 and why does it produce hashes in non-hexadecimal notation?

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问题 I am doing a hacking challenge from Hack This Site in which I found a password hash and then cracked it by brute forcing possibilities. The format that my hash cracker (John the Ripper) used was something called "FreeBSD MD5". The password and hash are the following: PW: shadow HASH: $1$AAODv...$gXPqGkIO3Cu6dnclE/sok1 My question is, doesn't MD5 normally only have the charset 0123456789abcdef (hexadecimal)? Why is this hash suddenly including a bunch of other characters? Screenshot: 回答1: This

What is FreeBSD MD5 and why does it produce hashes in non-hexadecimal notation?

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