Encryption and decryption with asymmetric keys is computationally expensive.
This is how encrypt works, in order to allow each piece of data
in a data frame to be decrypted without compromise of the whole data frame.
This works on the presumption that each cell contains less than 245 bytes of
data.
encrypt_file(.path, crypt_file_name = NULL, public_key_path = "id_rsa.pub")
| .path | Quoted path to file to encrypt. |
|---|---|
| crypt_file_name | Optional new name to give encrypted file. Must end with ".encrypter.bin". |
| public_key_path | Quoted path to public key, created with
|
The encrypted file is saved.
File encryption requires a different approach as files are often larger in
size. This function encrypts a file using a a symmetric "session" key and the
AES-256 cipher. This key is itself then encrypted using a public key
generated using genkeys. In OpenSSL this combination is
referred to as an envelope.
# This will run: # Create example file to encrypt # write.csv(gp, "gp.csv") # genkeys() # encrypt_file("gp.csv") # For CRAN and testing: if (FALSE) { # Run only once in decrypt_file example temp_dir = tempdir() # temp directory for testing only genkeys(file.path(temp_dir, "id_rsa")) write.csv(gp, file.path(temp_dir, "gp.csv")) encrypt_file(file.path(temp_dir, "gp.csv"), public_key_path = file.path(temp_dir, "id_rsa.pub")) }