rsa_encrypt | R Documentation |
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 or pkcs7_encrypt for a high-level wrappers combining RSA and AES in this way.
rsa_encrypt(data, pubkey = my_pubkey(), oaep = FALSE)
rsa_decrypt(data, key = my_key(), password = askpass, oaep = FALSE)
data |
raw vector of max 245 bytes (for 2048 bit keys) with data to encrypt/decrypt |
pubkey |
public key or file path. See |
oaep |
if TRUE, changes padding to EME-OAEP as defined in PKCS #1 v2.0 |
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)
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