method aead.unsealChaCha

Verifies and decrypts what sealChaCha produced; a wrong key or modified data is a CryptoError.

Example:

use std.crypto { aead, CryptoError }
use std.ser { bytesOf }

fn main() io, rand {
  let key = bytesOf(&"0123456789abcdef0123456789abcdef")
  let sealed = aead.sealChaCha(key, bytesOf(&"hi"), bytesOf(&"ctx-a"))!
  match aead.unsealChaCha(key, sealed, bytesOf(&"ctx-b")) {
    bytes _ => print("opened")
    CryptoError _ => print("refused")
  }
}

refused

pub(api) static fn unsealChaCha(key: bytes, sealed: bytes, aad: bytes = b"") -> bytes | CryptoError

Complexity. O(n) in the size of the message.

Since. 1.0.0-beta

Parameters

Returns

bytes

Errors

• CryptoError @error
• `CryptoError` for a wrong key, modified data or different associated data.

Effects

none declared (pure unless the body says otherwise)

Defined in: std/crypto/crypto.oxl:525