node-rsa errors when trying to decrypt message with private key

Question

So I\'ve been trying to use node with node-rsa and javascript with jsencrypt to create a website (for an assignment) where the javascript client gets the public key generate

Answer 1

It seems that the ciphertext is a buffer, i.e. binary data. Then it is transported using JSON, which consists of text. You need to use a text encoding over the binary data to transport it over a text based interface.

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Check the following definition of the encrypt method:

key.encrypt(buffer, [encoding], [source_encoding]);

with the reminder that the default is 'buffer' for [encoding].

So you should be using:

var encrypted = myEncrypter.encrypt(message, 'base64', 'utf-8');

where 'base64' is for the ciphertext encoding and 'utf-8' is for the plaintext encoding.

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The decryption routine should automatically use base64 decoding of the ciphertext:

var clearMessage = myDecrypter.decrypt(message.message, 'utf8');

should be just fine.