Python equivalent of NodeJS AES 256 CTR algorithm
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I have been encrypting messages with a nodejs module like so:
var crypto = require('crypto'),
algorithm = 'aes-256-ctr',
password = 'd6F3Efeq';
function encrypt(text)
var cipher = crypto.createCipher(algorithm,password)
var crypted = cipher.update(text,'utf8','hex')
crypted += cipher.final('hex');
return crypted;
(from here:https://lollyrock.com/articles/nodejs-encryption/)
However, using the same secret, same algorithm and same mode I cannot decrypt this using cryptography in Python.
Here's one of the things I've tried:
crypto = AES.new(password, AES.MODE_CTR)
print(crypto.decrypt(message.decode("hex")))
Returns binary data. Encoding it in UTF-8 fails, and most interestingly:
it seems AWS.new generates a random iv each time, and the result of the decryption is different for each run!
.. Now, the nodeJS library does not return a Nonce, so I don't know what else to bring with me from the NodeJS function apart from the ciphertext and the password (secret) - any ideas?
python node.js encryption cryptography aes
asked Nov 9 at 18:05
Alex
4,13621117
add a comment |
up vote
0
down vote
favorite
I have been encrypting messages with a nodejs module like so:
var crypto = require('crypto'),
algorithm = 'aes-256-ctr',
password = 'd6F3Efeq';
function encrypt(text)
var cipher = crypto.createCipher(algorithm,password)
var crypted = cipher.update(text,'utf8','hex')
crypted += cipher.final('hex');
return crypted;
(from here:https://lollyrock.com/articles/nodejs-encryption/)
However, using the same secret, same algorithm and same mode I cannot decrypt this using cryptography in Python.
Here's one of the things I've tried:
crypto = AES.new(password, AES.MODE_CTR)
print(crypto.decrypt(message.decode("hex")))
Returns binary data. Encoding it in UTF-8 fails, and most interestingly:
it seems AWS.new generates a random iv each time, and the result of the decryption is different for each run!
.. Now, the nodeJS library does not return a Nonce, so I don't know what else to bring with me from the NodeJS function apart from the ciphertext and the password (secret) - any ideas?
python node.js encryption cryptography aes
asked Nov 9 at 18:05
Alex
4,13621117
which python crypto module are you using?
– James K Polk
Nov 9 at 19:12
3
From the crypto documentation:Users should not use ciphers with counter mode (e.g. CTR, GCM, or CCM) in crypto.createCipher()this is why you have no nonce. Usecrypto.createCipheriv() tinstead and provide a large random nonce (IV=Nonce).
– Robert
Nov 9 at 19:21
1
Yep, your node code is invoking undefined behavior. Using that in production would be a very poor idea. See the code examples in this repository.
– Luke Joshua Park
Nov 9 at 19:48
This might help you
– kelalaka
Nov 9 at 20:22
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
I have been encrypting messages with a nodejs module like so:
var crypto = require('crypto'),
algorithm = 'aes-256-ctr',
password = 'd6F3Efeq';
function encrypt(text)
var cipher = crypto.createCipher(algorithm,password)
var crypted = cipher.update(text,'utf8','hex')
crypted += cipher.final('hex');
return crypted;
(from here:https://lollyrock.com/articles/nodejs-encryption/)
However, using the same secret, same algorithm and same mode I cannot decrypt this using cryptography in Python.
Here's one of the things I've tried:
crypto = AES.new(password, AES.MODE_CTR)
print(crypto.decrypt(message.decode("hex")))
Returns binary data. Encoding it in UTF-8 fails, and most interestingly:
it seems AWS.new generates a random iv each time, and the result of the decryption is different for each run!
.. Now, the nodeJS library does not return a Nonce, so I don't know what else to bring with me from the NodeJS function apart from the ciphertext and the password (secret) - any ideas?
python node.js encryption cryptography aes
asked Nov 9 at 18:05
Alex
4,13621117
I have been encrypting messages with a nodejs module like so:
var crypto = require('crypto'),
algorithm = 'aes-256-ctr',
password = 'd6F3Efeq';
function encrypt(text)
var cipher = crypto.createCipher(algorithm,password)
var crypted = cipher.update(text,'utf8','hex')
crypted += cipher.final('hex');
return crypted;
(from here:https://lollyrock.com/articles/nodejs-encryption/)
However, using the same secret, same algorithm and same mode I cannot decrypt this using cryptography in Python.
Here's one of the things I've tried:
crypto = AES.new(password, AES.MODE_CTR)
print(crypto.decrypt(message.decode("hex")))
Returns binary data. Encoding it in UTF-8 fails, and most interestingly:
it seems AWS.new generates a random iv each time, and the result of the decryption is different for each run!
.. Now, the nodeJS library does not return a Nonce, so I don't know what else to bring with me from the NodeJS function apart from the ciphertext and the password (secret) - any ideas?
python node.js encryption cryptography aes
python node.js encryption cryptography aes
asked Nov 9 at 18:05
Alex
4,13621117
asked Nov 9 at 18:05
Alex
4,13621117
asked Nov 9 at 18:05
Alex
4,13621117
asked Nov 9 at 18:05
Alex
4,13621117
asked Nov 9 at 18:05
Alex
4,13621117
4,13621117
which python crypto module are you using?
– James K Polk
Nov 9 at 19:12
3
From the crypto documentation:Users should not use ciphers with counter mode (e.g. CTR, GCM, or CCM) in crypto.createCipher()this is why you have no nonce. Usecrypto.createCipheriv() tinstead and provide a large random nonce (IV=Nonce).
– Robert
Nov 9 at 19:21
1
Yep, your node code is invoking undefined behavior. Using that in production would be a very poor idea. See the code examples in this repository.
– Luke Joshua Park
Nov 9 at 19:48
This might help you
– kelalaka
Nov 9 at 20:22
add a comment |
which python crypto module are you using?
– James K Polk
Nov 9 at 19:12
3
From the crypto documentation:Users should not use ciphers with counter mode (e.g. CTR, GCM, or CCM) in crypto.createCipher()this is why you have no nonce. Usecrypto.createCipheriv() tinstead and provide a large random nonce (IV=Nonce).
– Robert
Nov 9 at 19:21
1
Yep, your node code is invoking undefined behavior. Using that in production would be a very poor idea. See the code examples in this repository.
– Luke Joshua Park
Nov 9 at 19:48
This might help you
– kelalaka
Nov 9 at 20:22
which python crypto module are you using?
– James K Polk
Nov 9 at 19:12
which python crypto module are you using?
– James K Polk
Nov 9 at 19:12
3
3
From the crypto documentation:
Users should not use ciphers with counter mode (e.g. CTR, GCM, or CCM) in crypto.createCipher() this is why you have no nonce. Use crypto.createCipheriv() t instead and provide a large random nonce (IV=Nonce).– Robert
Nov 9 at 19:21
From the crypto documentation:
Users should not use ciphers with counter mode (e.g. CTR, GCM, or CCM) in crypto.createCipher() this is why you have no nonce. Use crypto.createCipheriv() t instead and provide a large random nonce (IV=Nonce).– Robert
Nov 9 at 19:21
1
1
Yep, your node code is invoking undefined behavior. Using that in production would be a very poor idea. See the code examples in this repository.
– Luke Joshua Park
Nov 9 at 19:48
Yep, your node code is invoking undefined behavior. Using that in production would be a very poor idea. See the code examples in this repository.
– Luke Joshua Park
Nov 9 at 19:48
This might help you
– kelalaka
Nov 9 at 20:22
This might help you
– kelalaka
Nov 9 at 20:22
add a comment |
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which python crypto module are you using?
– James K Polk
Nov 9 at 19:12
3
From the crypto documentation:
Users should not use ciphers with counter mode (e.g. CTR, GCM, or CCM) in crypto.createCipher()this is why you have no nonce. Usecrypto.createCipheriv() tinstead and provide a large random nonce (IV=Nonce).– Robert
Nov 9 at 19:21
1
Yep, your node code is invoking undefined behavior. Using that in production would be a very poor idea. See the code examples in this repository.
– Luke Joshua Park
Nov 9 at 19:48
This might help you
– kelalaka
Nov 9 at 20:22