Some sensitive data is transformed into something unreadable, save for the entity who knows the decryption key.

There is asymmetric encryption and there is digital signature.Īsymmetric encryption is about keeping confidentiality. How can I do this? Or maybe there is a better way of achieving my desired result that I haven't considered?Īllow me a bit of terminology. So when I convert it to a string for writing to file, I'll need to convert it back to type 'tuple' when I'm decrypting. RSAkey.encrypt(key, '') returns type 'tuple', so I figure RSA.decrypt() expects this type as well, but I can't write that type to a textfile. The code is as follows: RSAkey = custom_readfile_function('private_key.txt', 'r')Įnc_key = custom_readfile_function('enc_key.txt', 'r')Ĭustom_writefile_function('key.txt', str(aes_key), 'w') Return (self, ciphertext)įile '/usr/lib/python2.7/dist-packages/Crypto/PublicKey/pubkey.py', line 93, in decryptįile '/usr/lib/python2.7/dist-packages/Crypto/PublicKey/RSA.py', line 237, in _decrypt crypt(str(RSAkey.encrypt(key, '')))įile '/usr/lib/python2.7/dist-packages/Crypto/PublicKey/RSA.py', line 174, in decrypt The problem however, is that in another script, meant for decrypting enc_key to get the original AES key used to encrypt the files, trying to decrypt the enc_key which has been converted to a string produces an error: I am converting the enc_key to a string so that I can write it to a text file, otherwise enc_key.txt will contain rubbish. RSAkey = '-BEGIN PUBLIC KEY- Some RSA Key here -END PUBLIC KEY-'Ĭustom_writefile_function('enc_key.txt', enc_key) The code is as follows: from Crypto.PublicKey import RSA The encrypted AES key will be shared with authorized persons in possession of the private key to decrypt it.

I am trying to implement a script that will encrypt a file using a randomly generated AES key then encrypt said AES key with an RSA public key.

Decrypt rsa 1024 python pycrypto