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XChaCha20Poly1305Nonce

bitwarden_crypto::hazmat::symmetric_encryption::xchacha20

Struct XChaCha20Poly1305Nonce 

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pub(crate) struct XChaCha20Poly1305Nonce(Nonce<XChaCha20Poly1305>);
Expand description

A 192-bit XChaCha20-Poly1305 nonce.

XChaCha20-Poly1305 has a large (192-bit) nonce, so a fresh, cryptographically random nonce can be generated for every message with XChaCha20Poly1305Nonce::make without a practical risk of nonce reuse.

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§0: Nonce<XChaCha20Poly1305>

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impl XChaCha20Poly1305Nonce

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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 XChaCha20Poly1305Nonce

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 XChaCha20Poly1305Nonce

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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