Crypt::RSA::ES::OAEP - Plaintext-aware encryption with RSA.
my $oaep = new Crypt::RSA::ES::OAEP;
my $ct = $oaep->encrypt( Key => $key, Message => $message ) ||
my $pt = $oaep->decrypt( Key => $key, Cyphertext => $ct ) ||
This module implements Optimal Asymmetric Encryption, a plaintext-aware
encryption scheme based on RSA. The notion of plaintext-aware implies it's
computationally infeasible to obtain full or partial information about a
message from a cyphertext, and computationally infeasible to generate a valid
cyphertext without knowing the corresponding message. Plaintext-aware schemes,
such as OAEP, are semantically secure, non-malleable and secure against
chosen-ciphertext attack. For more information on OAEP and plaintext-aware
encryption, see ,  & .
Returns the version number of the module.
Encrypts a string with a public key and returns the encrypted string on success.
encrypt() takes a hash argument with the following mandatory keys:
Decrypts cyphertext with a private key and returns plaintext on success.
$self->errstr is set to "Decryption
Error." or appropriate error on failure. decrypt() takes a hash
argument with the following mandatory keys:
- A string to be encrypted. The length of this string should not exceed k-42
octets, where k is the octet length of the RSA modulus. If Message is
longer than k-42, the method will fail and set
$self->errstr to "Message too long."
This means the key must be at least _336_ bits long if you are to use
- Public key of the recipient, a Crypt::RSA::Key::Public object.
See ERROR HANDLING in Crypt::RSA(3) manpage.
See BIBLIOGRAPHY in Crypt::RSA(3) manpage.
Vipul Ved Prakash, <email@example.com>
- A string encrypted with encrypt(). The length of the cyphertext
must be k octets, where k is the length of the RSA modulus.
- Private key of the receiver, a Crypt::RSA::Key::Private object.
- Version of the module that was used for creating the Cyphertext. This is
an optional argument. When present, decrypt() will ensure before
proceeding that the installed version of the module can successfully
decrypt the Cyphertext.