Function seal [src]

Encrypt a message m for a recipient whose public key is public_key. c must be seal_length bytes larger than m, so that the required metadata can be added.

Prototype

pub fn seal(c: []u8, m: []const u8, public_key: [public_length]u8) (WeakPublicKeyError || IdentityElementError)!void

Parameters

c: []u8m: []const u8public_key: [public_length]u8

Source

  pub fn seal(c: []u8, m: []const u8, public_key: [public_length]u8) (WeakPublicKeyError || IdentityElementError)!void {
    debug.assert(c.len == m.len + seal_length);
    var ekp = KeyPair.generate();
    const nonce = createNonce(ekp.public_key, public_key);
    c[0..public_length].* = ekp.public_key;
    try Box.seal(c[Box.public_length..], m, nonce, public_key, ekp.secret_key);
    crypto.secureZero(u8, ekp.secret_key[0..]);
}  