Error "module 'Crypto.Cipher.AES' has no attribute 'MODE_CCM'" in sqsQueue.py when subscribing to RD

oleksiy.bondarenko1

Error "module 'Crypto.Cipher.AES' has no attribute 'MODE_CCM'" pops up , in sqsQueue.py when subscribing to RDP newsAlerts

Curable by 'pip install pycryptodomex', and amending the sqsQueue.py as:

10: from Crypto.Cipher import AES

to

10: from Cryptodome.Cipher import AES

Could you please adjust the https://developers.refinitiv.com/refinitiv-data-platform/refinitiv-data-platform-apis/downloads "Quickstart and Python tutorials source code" accourdingly.

Or recommend an alternative solution.

Gurpreet

pycryptodome was chosen since it is a fork of popular PyCrypto and a drop in replacement. It does not expose the module as Cryptodome.Cipher but as Crypto.Cipher.

Gurpreet

Hi @oleksiy.bondarenko1,

Can you please elaborate your question - why do you need CCM? Both the News and Research alerts are encrypted using AES-GCM. The tutorial and the comment in the sample file state that it depends on pycryptodome module for decryption.

Does that not work? Thanks.

oleksiy.bondarenko1

Indeed

The error I get under default anaconda-packaged pycrypto 2.6.1 , on both linux and windows, since late 2019, is

AttributeError: module 'Crypto.Cipher.AES' has no attribute 'MODE_GCM'

from Crypto.Cipher import AES (this import is used in your sample code)

dir(AES)

Out[53]:

['AESCipher',

'MODE_CBC',

'MODE_CFB',

'MODE_CTR',

'MODE_ECB',

'MODE_OFB',

'MODE_OPENPGP',

'MODE_PGP',

'_AES',

...

So I need to pip install pycryptodome (or pycryptodomex)

from Cryptodome.Cipher import AES (need to change the import to this, i.e. Cryptodome)

dir(AES)

Out[55]:

['MODE_CBC',

'MODE_CCM',

'MODE_CFB',

'MODE_CTR',

'MODE_EAX',

'MODE_ECB',

'MODE_GCM',

...

Gurpreet

Well, the tutorial and the sample explicitly state that it uses pycryptodome.

oleksiy.bondarenko1

Then you can be as explicit, and have

from Cryptodome.Cipher import AES (rather than from Crypto.Cipher import AES )