7.1. Public Key Encryption (PKE)¶

Data Types:

PKEEncKey

The RSA public key for public-key encryption with RSA.

PKEDecKey

The RSA private key, used for RSA decryption.

Functions:

PKEKeyGen() (PKEEncKey, PKEDecKey, error)¶

Generate a 2048-bit RSA key pair for public-key encryption.

Return type

PKEEncKey, PKEDecKey, error

PKEEnc(ek PKEEncKey, plaintext []byte) ([]byte, error)¶

Use the RSA public key to encrypt a message.

Parameters

• ek (PKEEncKey) – RSA encryption (public) key

• plaintext ([]byte) – Message to encrypt, no longer than 126 bytes

Return type

[]byte, error

PKEDec(dk PKEDecKey, ciphertext []byte) ([]byte, error)¶

Use the RSA private key to decrypt a ciphertext.

Parameters

• ek (PKEDecKey) – RSA encryption (private) key

• ciphertext ([]byte) – Message to decrypt

Return type

[]byte, error