hmac | 易学教程

PBKDF2-HMAC-SHA2 test vectors

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问题 There are test vectors for PBKDF2-HMAC-SHA1 in RFC6070. There are test vectors for HMAC-SHA2 in RFC4231. But so far I haven't found test vectors for PBKDF2-HMAC-SHA2 anywhere. I'm most interested in SHA256, so I'll post some vectors I calculated with my implementation. I'd be happy if someone could verify/confirm them, or contribute their own. 回答1: I implemented PBKDF2 using the standard hashlib and hmac modules in Python and checked the output against both the RFC 6070 vectors and the

PHP: How can I generate a HmacSHA256 signature of a string

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问题 Is there any way to create a HmacSHA256 signature of a string in php? 回答1: Use hash_hmac: $sig = hash_hmac('sha256', $string, $secret) Where $secret is your key. 回答2: The hash_hmac() function could help, here : Generate a keyed hash value using the HMAC method For example, the following portion of code : $hash = hash_hmac('sha256', 'hello, world!', 'mykey'); var_dump($hash); Gives the following output : string '07a932dd17adc59b49561f33980ec5254688a41f133b8a26e76c611073ade89b' (length=64) And,

中国空气质量在线监测分析平台之JS加密、JS混淆处理

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中国空气质量在线监测分析平台数据爬取分析页面分析：确定url、请求方式、请求参数、响应数据　　 1.访问网站首页： https://www.aqistudy.cn/html/city_detail.html ，通过抓包工具分析首页请求并没有获取到页面内的数据信息　　 2.因此可以确定页面内的数据是动态加载的，通过抓包工具捕获加密的响应对象，　　 3.加密响应对象是通过post请求携带加密的参数发起（2次）。　　 4.综上分析可以确定，动态请求时在搜索按钮触发时发起的，因此通过火狐firefox浏览器分析页面搜索按钮的绑定事件以及定位到具体的代码在哪一行。　　 5.通过标签绑定事件可以确定是触发了getData()函数，因此对应转包工具捕获到的两次请求，进入js代码，找到函数的执行过程。　　 6。在当前js中搜索找到getAQIData();和getWeatherData();函数，也没发现ajax发起的post请求，但都调用了getServerData函数，只是唯一一个参数不同method = 'GETDETAIL';method = 'GETCITYWEATHER';，因此继续分析getServerData函数。　　 7.在当前js中为找到getServerData 函数定义，切换到google浏览器对请求响应进行全局搜索，获取函数定义--- js反混淆。　　

How to implement HMAC Authentication in a RESTful WCF API

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问题 We are building a RESTful API using WCF (currently .Net 3.5, but will be moving to .Net 4 soon). We have a functional framework in place, but it is currently unsecured. It will need to be accessible from .Net applications as well as iOS, Android, and web applications. We would like to use an HMAC Authentication scheme as described here and here, but both examples seem to fall apart when describing how to validate the hash. The first example fails to describe the UserKeys object (hashtable?)

HMAC-SHA1: How to do it properly in Java?

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问题 I'm hashing some values using HMAC-SHA1, using the following code in Java: public static String hmacSha1(String value, String key) { try { // Get an hmac_sha1 key from the raw key bytes byte[] keyBytes = key.getBytes(); SecretKeySpec signingKey = new SecretKeySpec(keyBytes, "HmacSHA1"); // Get an hmac_sha1 Mac instance and initialize with the signing key Mac mac = Mac.getInstance("HmacSHA1"); mac.init(signingKey); // Compute the hmac on input data bytes byte[] rawHmac = mac.doFinal(value

How do I sign a POST request using HMAC-SHA512 and the Python requests library?

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问题 I'm trying to use Python to access the trading API at poloniex.com, a cryptocurrency exchange. To do this I must follow this prescription: All calls to the trading API are sent via HTTP POST to https://poloniex.com/tradingApi and must contain the following headers: Key - Your API key. Sign - The query's POST data signed by your key's "secret" according to the HMAC-SHA512 method. Additionally, all queries must include a "nonce" POST parameter. The nonce parameter is an integer which must

HMAC SHA1 ColdFusion

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问题 Please help! I have been pulling out my hair over this one. :) I have a site that I need to HMAC SHA1 for authentication. It currently works with another language but now I need to move it to ColdFusion. For the life of me I cannot get the strings to match. Any assistance would be much appreciated. Data: https%3A%2F%2Fwww%2Etestwebsite%2Ecom%3Fid%3D5447 Key: 265D5C01D1B4C8FA28DC55C113B4D21005BB2B348859F674977B24E0F37C81B05FAE85FB75EA9CF53ABB9A174C59D98C7A61E2985026D2AA70AE4452A6E3F2F9 Correct

How to generate an HMAC in Java equivalent to a Python example?

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问题 I'm looking at implementing an app getting Twitter authorization via Oauth in Java. The first step is getting a request token. Here is a Python example for app engine. To test my code, I am running Python and checking output with Java. Here is an example of Python generating a Hash-Based Message Authentication Code (HMAC): #!/usr/bin/python from hashlib import sha1 from hmac import new as hmac key = "qnscAdgRlkIhAUPY44oiexBKtQbGY0orf7OV1I50" message = "foo" print "%s" % hmac(key, message,

How to send password securely via HTTP using Javascript in absence of HTTPS?

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问题 The very basic issue all developers face: Whenever user submits the form, the password is sent via network and it must be protected. The site I develop for doesn't have HTTPS. Neither does the owner want to buy a SSL certificate, nor is he interested in a self-signed one. So I want to protect the password sent via HTTP using Javascript when submitting form. To eager downvoters: How to send password securely over HTTP? DOES NOT give any sensible solution and I am in another situation. If I use

Objective-C sample code for HMAC-SHA1 [closed]

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I need to generate HMAC-SHA1 in Objective C. But i didnt find anything that works. I tried with CommonCrypto, using CCHMAC, but didnt works. I need to generate a hmac and after generate HOTP number. Somebody have any example code in Objective C or C? Here's how you generate an HMAC using SHA-256: NSString *key; NSString *data; const char *cKey = [key cStringUsingEncoding:NSASCIIStringEncoding]; const char *cData = [data cStringUsingEncoding:NSASCIIStringEncoding]; unsigned char cHMAC[CC_SHA256_DIGEST_LENGTH]; CCHmac(kCCHmacAlgSHA256, cKey, strlen(cKey), cData, strlen(cData), cHMAC); NSData