Verify = rsa.verify(msg1, b64decode(signature), public) Signature = b64encode(rsa.sign(msg1, private, "SHA-512")) # decodes the Base64 encoded bytes-like object or ASCII string sĭecrypted = rsa.decrypt(b64decode(encrypted), private) #RSA encryption protocol according to PKCS#1 OAEPĭef sign(message, priv_key, hashAlg="SHA-256"):Įncrypted = b64encode(rsa.encrypt(msg1, private)) Key = RSA.generate(keysize, random_generator) # signing, verifying signatures & keys generationįrom Crypto.Hash import SHA512, SHA384, SHA256, SHA, MD5 # Python helper class to perform RSA encryption, decryption,
And that's why there is a dedicated signature package in P圜rypto - this effectively does what you described, but also additionally takes care of the things I mentioned"Īdapting this link I came to the following code that should solve your question: # RSA helper class for pycrypto "As it turns out, P圜rypto is only trying to prevent you from mistaking one for the other here, OpenSSL or Ruby OpenSSL allow you for example to do both: public_encrypt/public_decrypt and private_encrypt/private_decryptĪdditional things need to be taken care of to make the result usable in practice. I was curious about your problem and then I started to try to codeĪfter a while I realized that if you run this snippet you will see that it correctly works: #!/usr/bin/env pythonĮncoded = encrypt_private_key(message, public)īut if you now change two of the final lines into: encoded = encrypt_private_key(message, private)Īnd rerun the program you will get the TypeError: No private key the code that you are using doesn't allow you to do that for security reasons.Private_key, public_key = generate_keys()Įncoded = encrypt_private_key(message, private_key)ĭecoded = decrypt_public_key(encoded, public_key)īut it raises the next error: TypeError: This is not a private key. Private_key = RSA.generate(modulus_lenght, Random.new().read)ĭef encrypt_private_key(a_message, private_key):Įncrypted_msg = encryptor.encrypt(a_message)Įncoded_encrypted_msg = base64.b64encode(encrypted_msg)ĭef decrypt_public_key(encoded_encrypted_msg, public_key):ĭecoded_encrypted_msg = base64.b64decode(encoded_encrypted_msg)ĭecoded_decrypted_msg = crypt(decoded_encrypted_msg) I've tried to do this: from Crypto import Random I want to do an app where the message is public but it can only be seen if you have the public key.
More than secure encryption I'm looking for some kind of obfuscation. Is it possible to encrypt a message with a private key in python using pycryptodome or any other library? I know that you are not supposed to encrypt with the private key and decrypt with the public key, but my purpose is to encrypt with the private one so the receiver could be sure that the message was send by the real author.
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