Python how to encode with RSA using modulus + exponent

Question

Hello i need to encode text with RSA using modulus and exponent + input

I have tried this, but am getting errors

            rsa_modulus = data['publickey_mod']
            rsa_exponent = data['publickey_exp']
            rsa_timestamp = data['timestamp']
            rsa_publickey = rsa.PublicKey(rsa_modulus, rsa_exponent)
            encrypted = rsa.encrypt(password,rsa_publickey)
            print(encrypted)

AttributeError: 'str' object has no attribute 'bit_length'

Nobody here has any idea about what `data` contains, nor can we determine which line is raising that exception, so it will be hard to help. In fact, we don't *really* know what crypto library you're using either. Perhaps you can add some clarification. — President James K. Polk, Oct 13 '19 at 23:39

score 1 · Answer 1 · answered Oct 13 '19 at 19:48

1

Hopefully you are doing this as a demonstration, and not for an actual security critical application. Because using just RSA in this manner without any random padding is not secure.

See How do you encrypt a password by using the RSA Algorithm?

answered Oct 13 '19 at 19:48

vy32

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score 0 · Accepted Answer · answered Oct 13 '19 at 19:23

0

Try to encode your password:

encrypted = rsa.encrypt(password.encode('utf8'), rsa_publickey)

rsa.Encrypt takes a byte object

answered Oct 13 '19 at 19:23

Joe

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should i transfer rsa_publickey to byte object too ? – Stringsko Oct 15 '19 at 04:40
I didnt need to when i recreated the issue – Joe Oct 15 '19 at 20:54

Python how to encode with RSA using modulus + exponent

2 Answers2