Low-level RSA encryption
Asymmetric encryption and decryption with RSA. Because RSA can only encrypt messages
smaller than the size of the key, it is typically used only for exchanging a random
session-key. This session key is used to encipher arbitrary sized data via a stream
cipher such as aes_cbc. See encrypt_envelope for a high-level
wrappers combining RSA and AES in this way.
rsa_encrypt(data, pubkey = my_pubkey()) rsa_decrypt(data, key = my_key(), password = askpass)
data |
raw vector of max 245 bytes (for 2048 bit keys) with data to encrypt/decrypt |
pubkey |
public key or file path. See |
key |
private key or file path. See |
password |
string or a function to read protected keys. See |
# Generate test keys
key <- rsa_keygen()
pubkey <- key$pubkey
# Encrypt data with AES
tempkey <- rand_bytes(32)
iv <- rand_bytes(16)
blob <- aes_cbc_encrypt(system.file("CITATION"), tempkey, iv = iv)
# Encrypt tempkey using receivers public RSA key
ciphertext <- rsa_encrypt(tempkey, pubkey)
# Receiver decrypts tempkey from private RSA key
tempkey <- rsa_decrypt(ciphertext, key)
message <- aes_cbc_decrypt(blob, tempkey, iv)
out <- rawToChar(message)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.