Enum CryptoErr 

#[repr(C)]
pub enum CryptoErr {
    Ok = 0,
    NoSuchAlgorithm = 1,
    UnexpectedDataLength = 2,
    BufferShorterThanTag = 3,
    DecryptError = 4,
    AadPreallocationExceeded = 5,
    NoIdentifier = 6,
}

Variants

Ok = 0

NoSuchAlgorithm = 1

UnexpectedDataLength = 2

Data was put into the AAD, plaintext or buffer whose length was not as originally announced

BufferShorterThanTag = 3

The only possible encryption error

DecryptError = 4

Decryption failed (ie. message corruption / tampering / disagreement on nonce or AAD)

AadPreallocationExceeded = 5

Returned when the AAD is longer than pre-allocated, and neither streaming AAD nor dynamic allocation are not implemented (which is unconditional so far)

NoIdentifier = 6

A kind of identifier was requested of an algorithm that is not specified