aes-example | Learn how to build AES encryption | Encryption library
kandi X-RAY | aes-example Summary
kandi X-RAY | aes-example Summary
AES implementations are available in many languages, including Java and JavaScript. In Java, the javax.crypto.* packages are part of the standard, and in JavaScript, the excellent [CryptoJS][1] provides an implementation for many cryptographic algorithms. However, due to different default settings and various implementation details, it is not trivial to use the APIs in a way, that the result is the same on all platforms.
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Top functions reviewed by kandi - BETA
- Encrypt a plaintext with a password and passphrase
- Generates a secret key
- Encrypt the given bytes with the encryption mode
- Decode a hex string to a byte array
- Encodes the given byte array as a base 64 string
- Fail IllegalStateException
- Performs a basic decrypt method
- Decrypts the given ciphertext with the given salt and passphrase
- Generates a random salt
aes-example Key Features
aes-example Examples and Code Snippets
Community Discussions
Trending Discussions on aes-example
QUESTION
I have tried to encrypt some plaintext, which is in bytes, with a key, which is in bytes. However, the output I am getting is not what I am expecting.
...ANSWER
Answered 2018-Nov-09 at 23:11There are two things incorrect in your code.
You use PKCS5 padding while the original example doesn't use any padding.
You incorrectly copied the plain text.
So:
QUESTION
I'm trying to implement a aes/cbc/pkcs5padding algorithm. I started off with some CryptoJS in JS and found out how wonderful the encryption and decryption works in some seconds. I searched for many compatible solutions because the value that got returned was always wrong.
Unimportant: My goal is the following concept:
- The user account is created server-side and the password is hashed with SHA-256
- The user tries to log-in on the webpage (client-side JS) where a packet is sent to the server beginning with his plain username followed by an AES encrypted JSONObject with a simple success message. The key for the AES is the SHA-256 of the user's password hashed locally
- The server receives this packet and checks for all user accounts if any of the names match with the beginning of the packet. In that case, the application separates the AES part of it and tries to decrypt it with the SHA-256 hashed password the server knows since the creation of the user
- If the decryption succeeded, client and server will continue using this key and have a nice communication without transmitting the plain AES key with the websocket at any time. If the decryption fails, the user gets an error message "credentials incorrect"
That's just for your information to help me ;) Because I could not know what CryptoJS exactly does with the data it gets I started with Java and ended up with the following Java implementation:
...ANSWER
Answered 2018-Jan-10 at 22:24I got it working after implementing the aes example from https://github.com/mpetersen/aes-example as in the sourcecode, not the description. I modified it to pass the data within one string, so you only need the password and the key for the encryption/decryption. Here is my sourcecode (modified version of mpetersens aes-example):
JavaScript:
QUESTION
I'm looking at an C# AES asymmetric encryption and decryption example here and not sure if i should store the IV in a safe place (also encrypted??). Or i can just attach it to the encrypted text for using later when i with to decrypt. From a short reading about AES it seems it's not needed at all for decryption but i'm not sure i got it right and also the aes.CreateDecryptor(keyBytes, iv)
need it as parameter.
I use a single key for all encryptions.
...ANSWER
Answered 2017-Jun-22 at 16:02It's fairly standard to transmit the encrypted data as IV.Concat(cipherText)
. It's also fairly standard to put the IV off to the side, like in PKCS#5.
The IV-on-the-side approach matches more closely with how .NET wants to process the data, since it's somewhat annoying to slice off the IV to pass it separately to the IV parameter (or property), and then to have a more complicated slicing operation with the ciphertext (or recovered plaintext).
But the IV is usually transmitted in the clear either way.
So, glue it together, or make it a separate column... whatever fits your program and structure better.
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
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Install aes-example
You can use aes-example like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the aes-example component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .
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