aes | 易学教程

C#: AES error: Padding is invalid and cannot be removed. Same key and everything, help

阅读更多关于 C#: AES error: Padding is invalid and cannot be removed. Same key and everything, help

问题 I'm quite new to C# so please be patient with me. I know this question was asked a lot if times, but I couldn't find an answer to my problem. I'm saving some data and before writing it to a file I convert it to binary and store it in array, which I encrypt and then write to file. I encrypt data in chunks (32 bytes). In the same way I read data in chunks of 32 bytes and then decrypt that data and then this should repeat till the end of file. But when it comes to decryption the following error

Is AES256 encryption decryption possible in Java without unlimited strength JCE files?

阅读更多关于 Is AES256 encryption decryption possible in Java without unlimited strength JCE files?

The project I am working on has a segment which requires AES encryption and decryption. From all the possible internet source that I could look up, it was hard to find any reference to AES256 encryption without having to download and install the Unlimited Strength JCE files from Sun's (now Oracle's website). Besides whatever legal issues that exist with the distribution of the same, it is not helping us very practically when it comes to asking an end user to visit a particular website and download some files, put them in a directory and then add things to classpath if on Windows etc! There

Is it possible to hide the password in MySQL General/Slow Query Logs?

阅读更多关于 Is it possible to hide the password in MySQL General/Slow Query Logs?

问题 Sometimes I look through my MySQL logs and I stumble upon some AES_ENCRYPT/AES_DECRYPT requests showing the password in plaintext. If I create the logs inside PHP I would be able to delete them. But what about MySQL general/slow query logs. Is their an option available or is it possible to set a mySQL variable that won't be saved in the logs? 回答1: Unfortunately, I know of no way to disable MySQL logging for individual statements. The MySQL documentation advises to keep the logs secured for

Is it possible to use AES CTR mode encryption using the EVP API?

阅读更多关于 Is it possible to use AES CTR mode encryption using the EVP API?

问题 I'm new to OpenSSL. I understand that encryption should be performed using the EVP API which acts as a common interface to all the ciphers. AES CTR mode seems to be present in the version of OpenSSL that I have, but the definition for EVP_aes_128_ctr is disabled in evp.h: #if 0 const EVP_CIPHER *EVP_aes_128_ctr(void); #endif Any idea why this is? Can I just remove the #if 0? Any other pointers on getting 128 bit AES CTR mode encryption to work in OpenSSL would be appreciated! Thanks! 回答1: Btw

iPHone - AES 256 encryption without padding

阅读更多关于 iPHone - AES 256 encryption without padding

I've seen some of the posts for AES 256 encryption on iphone usign cocoa. One of the post is http://pastie.org/426530 But all the posts are using some kind of padding. How can I use AES256 encryption without using any padding? Because, I'm communicating with a server on which encryption/decryption is handled without padding. But on iphone, I can use kCCOptionPKCS7Padding or kCCOptionECBMode modes only. How can I code my iphone app so that encryption/decryption happens successfully? Block ciphers will always be a multiple of their block size. When data does not fit exactly into the cipher

Is AES256 encryption decryption possible in Java without unlimited strength JCE files?

阅读更多关于 Is AES256 encryption decryption possible in Java without unlimited strength JCE files?

问题 The project I am working on has a segment which requires AES encryption and decryption. From all the possible internet source that I could look up, it was hard to find any reference to AES256 encryption without having to download and install the Unlimited Strength JCE files from Sun's (now Oracle's website). Besides whatever legal issues that exist with the distribution of the same, it is not helping us very practically when it comes to asking an end user to visit a particular website and

利用Python爬取基于AES对称加密算法的网易云音乐用户评论数据

阅读更多关于利用Python爬取基于AES对称加密算法的网易云音乐用户评论数据

本文利用Python2.7根据网易云音乐歌曲ID爬取了该歌曲的所有用户评论数据。以id是28875120的歌曲《小岁月太着急》为示例，通过Chrome的DevTools工具获取已加密评论数据，然后基于AES对称加密算法对已加密数据进行解密实现，最后使用Python成功实现了对用户评论数据的抓取与保存。本文部分算法实现参考于知乎回答，全部代码可在 Github项目地址查看。利用DevTools工具获取加密数据进入 http://music.163.com/#/song?id=28875120 页面，打开Chrome的DevTools工具选择Network并重载页面，找到与评论数据相关的请求即name为R_SO_4_28875120?csrf_token=90e04572eb42b040167323ec2fcdd79f的POST请求，如下图所示：查看该请求信息，可知Request Headers参数如下：其中的POST Request URL完整地址为： http://music.163.com/weapi/v1/resource/comments/R_SO_4_28875120?csrf_token=90e04572eb42b040167323ec2fcdd79f 并且，该Form Data含有params和encSecKey两个参数，显然

AVPlayer Stops Playing AES encrypted offline HLS Video in online mode

阅读更多关于 AVPlayer Stops Playing AES encrypted offline HLS Video in online mode

问题 I have written a code to download HLS video and play it in offline mode. This code works fine for encoded video. Now I have a video which is AES encrypted and we are having custom encryption key for it. After downloading AES encrypted HLS video I am using below given code to supply key for decryption of video. - (BOOL)resourceLoader:(AVAssetResourceLoader *)resourceLoader shouldWaitForLoadingOfRequestedResource:(AVAssetResourceLoadingRequest *)loadingRequest { NSString *scheme =

Java BC SicBlockCipher direct output equivalent in c#

阅读更多关于 Java BC SicBlockCipher direct output equivalent in c#

问题 I am implementing something in C#, for which I have a separate spec and fairly clear understanding of what I need to do, but at the same time as a reference I have a Java implementation and would like to follow the Java implementation in this case as close as I can. The code involves an encrypted stream and the Java source is here The relevant lines are here: private final StreamCipher enc; ... BlockCipher cipher; enc = new SICBlockCipher(cipher = new AESEngine()); enc.init(true, new

How use AES/ECB/PKCS7Padding algorithm in Windows Phone 7?

阅读更多关于 How use AES/ECB/PKCS7Padding algorithm in Windows Phone 7?

I am new in windows phone development. How can I use AES/ECB/PKCS7Padding algorithm in WP7 ?. While googled I saw many suggested about Bouncy Castle. But I did not clearly understood about this Bouncy Castle. Is this an algorithm ?. I need to encrypt/decrypt password for sending to server. In all other phone (Android, iPhone, Blackberry), we use AES/ECB/PKCS7Padding algorithm for this. They all give same ecrypted/decrypt result for our input. But in windows phone I used AesManaged Class for the encryption. But it gives different encrypted result. In the msdn documentation ( MSDN documentation