RSA Private Key Example

Let’s assume that you already have an RSA public key and a private key, designated as pub.key and private.key respectively. The subsequent Python code will read the ‘private.key’ file and will output an encoded string representing your private key value.

import sys
import base64

def encode_key_to_base64(private_key_file):
    # The private key file is read
    with open(private_key_file, 'rb') as file:
        private_key = file.read()

    # The private key's content is converted into a Base64 encoded string
    return base64.b64encode(private_key).decode()

if __name__ == "__main__":
    if len(sys.argv) != 2:
        print("Usage: python script.py <path_to_private_key>")
        sys.exit(1)

    private_key_file = sys.argv[1]
    encoded_key = encode_key_to_base64(private_key_file)
    print(encoded_key)

Save the preceding code as a Python file, for instance, gen_hlssk.py. Execute it using the following command:

python gen_hlssk.py private.key

Afterwards, you will obtain the encoded string of ‘private.key’, which might look like:

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