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Aes256GcmNonce

bitwarden_crypto::hazmat::symmetric_encryption::aes_gcm

Struct Aes256GcmNonce 

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pub(crate) struct Aes256GcmNonce(Nonce<Aes256Gcm>);
Expand description

A 96-bit AES-256-GCM nonce.

AES-256-GCM has a short (96-bit) nonce, so a fresh nonce must be used for every message encrypted under a given key to avoid catastrophic nonce reuse. Generate a fresh nonce with Aes256GcmNonce::make for each encryption.

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§0: Nonce<Aes256Gcm>

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impl Aes256GcmNonce

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pub(crate) fn make() -> Self

Generates a fresh, cryptographically random nonce.

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pub(crate) fn as_bytes(&self) -> &[u8] ⓘ

Returns the raw nonce bytes.

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fn from_cose_iv(iv: &[u8]) -> Result<Self, CryptoError>

Parses the nonce from a COSE message’s unprotected iv header bytes.

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impl TryFrom<&CoseEncrypt> for Aes256GcmNonce

Parses the nonce from the unprotected iv header of a [CoseEncrypt] message.

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type Error = CryptoError

The type returned in the event of a conversion error.
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fn try_from(cose_encrypt: &CoseEncrypt) -> Result<Self, Self::Error>

Performs the conversion.
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impl TryFrom<&CoseEncrypt0> for Aes256GcmNonce

Parses the nonce from the unprotected iv header of a [CoseEncrypt0] message.

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type Error = CryptoError

The type returned in the event of a conversion error.
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fn try_from(cose_encrypt0: &CoseEncrypt0) -> Result<Self, Self::Error>

Performs the conversion.

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