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Questions tagged [aes-gcm]

Galois/Counter mode of the Advanced Encryption Standard: A mode of operation of the AES block cipher which both encrypts and authenticates its input data.

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Android - javax.crypto.AEADBadTagException

I'm currently getting an AEADBadTagException when trying to decrypt a file I have encrypted. I have searched pretty much everywhere on stackoverflow and unable to find a solution, and hoping there is just a small mistake I have made or something to…
FalseNull
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Cannot decrypt AES-256 GCM with Java

I have a node module that can both encrypt and decrypt with AES-256 GCM. Now I am also trying to decrypt with Java whatever the node module encrypts, but I keep getting a AEADBadTagException. I have tested the node module by itself and can confirm…
bitscuit
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GCMParameterSpec throws InvalidAlgorithmParameterException: unknown parameter type

I am doing android data encryption to save in SharedPreferences. GCMParameterSpec was introduced in Android in API 19 which I'm using for AES/GCM/NoPadding encryption. This is how I'm implementing it: Cipher c =…
Ricardo
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GCM encryption and decryption in xws-security (webservices-rt)

I've successfully implemented support for GCM encryption in xws-security (EncryptionProcessor.java) using JDK8 as tested against other systems. However I have a problem with decryption. The first problem was as…
tkr
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xmlsec with AES-GCM

I have compiled the newest release of XMLSec from https://www.aleksey.com/xmlsec/news.html in a cygwin enviroment. Now i am following this example to encrypt a XML file using a session key and digital signatures.…
chenino
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Is it possible to use AES128 with GCM mode on iOS?

So my question for you stackoverflow geniuses is: if there a way (native, library, framework, whatever..) to encrypt data with AES (preferably 128 but could be 256 too) using a strong Authenticated encryption algorithm, let's say GCM mode? Question…
tanou
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Adding additional authenticated data to AES-GCM on Android

I'm trying to add the additional authenticated data (AAD) to AES-GCM on Android. I see the Java 7 version of Cipher notes about using GCMParameterSpec and the updateAAD(...) method but given Android is Java 6 based I'm all out of ideas. I'm using…
scottyab
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Decryption of AES-GCM files using openssl

I'm currently trying to decrypt a given text using openssl. I tried to make my own code using the example given there : Late authentication in OpenSSL GCM decryption but i still have a bad result in the end. My decryption function is as followed…
user1970271
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Late authentication in OpenSSL GCM decryption

I am using OpenSSL's EVP interfaces to implement AES encryption using GCM mode. Now GCM, being one of the authentication modes, provides cipher text integrity. Meaning it generates a tag (MAC - message authentication code) on the cipher text (and…
sg1
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BouncyCastle GCM/CCM ArrayIndexOutOfBoundsException

can anyone give me an example for using GCM and/or CCM modes with AES in BouncyCastle? My code is this: SecretKeySpec key = new SecretKeySpec(keyBytes, "AES"); IvParameterSpec ivSpec = new IvParameterSpec(ivBytes); Cipher cipher =…
RYN
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Decrypt an encrypted message with AES GCM in Python

I use the AES method to encrypt a sentance called from a txt file. I used the GCM Mode and created a specific key too. Everything is working (the code is below). from Crypto.Cipher import AES from Crypto.Protocol.KDF import scrypt from…
Julien
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Different generated Ciphertext from AES-CTR & AES-GCM

To verify my understanding on AES-GCM & AES-CTR modes, I'm creating a simple example using python Crpyto.Cipher library. I'm expecting the same ciphertext is generated from both modes where both are using CTR method. Since my intention is just to…
Pi-Turn
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Java large file AES Encryption is very slow

I'm trying to encrypt a 512 Mb file with AES/CBC algorithm. It is taking around 7 sec which is too much. How to reduce the encryption time and make it faster. I'm using a fixed key and tried using CipherOutStream as well as cipher.update() instead…
Seelam Venkatanagasiva
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AES-GCM 256 decryption fails even with correct data

I have a given encrypted message (decrypted, it is "encrypted secret message") and I'm trying to retrieve this original string from the AES-GCM 256 encrypted one. I use the aes-gcm crate to do this: use aes_gcm::Aes256Gcm; use aead::{Aead, NewAead,…
CypElf
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Encrypting large byte array

I am using a Cipher for encryption/decryption. It has always been fine, but now I am having problem when dealing with large array bytes. This is my implementation: val cipher = Cipher.getInstance("AES/GCM/NoPadding") cipher.init(Cipher.ENCRYPT_MODE,…
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