Struct SenderContext 

pub struct SenderContext(/* private fields */);

HPKE sender context. Callers may use seal() to encrypt messages for the recipient.

Implementations

impl SenderContext

pub fn new( params: &Params, recipient_pub_key: &[u8], info: &[u8], ) -> Option<(Self, Vec<u8>)>

Performs the SetupBaseS HPKE operation and returns a sender context plus an encapsulated shared secret for recipient_pub_key.

Returns None if recipient_pub_key is invalid.

On success, callers may use seal() to encrypt messages for the recipient.

pub fn seal(&mut self, plaintext: &[u8], aad: &[u8]) -> Vec<u8>

Seal encrypts plaintext, and authenticates aad, returning the resulting ciphertext.

Note that HPKE encryption is stateful and ordered. The sender’s first call to seal() must correspond to the recipient’s first call to open(), etc.

This function panics if adding the plaintext length and bssl_sys::EVP_HPKE_CTX_max_overhead overflows.

pub fn export(&mut self, context: &[u8], out_len: usize) -> Vec<u8>

Exports a secret of length out_len from the HPKE context using context as the context string.