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# MlDsa44 Errors

:::info
`MlDsa44` is a re-export of ox's [`MlDsa44`](https://oxlib.sh/api/MlDsa44/errors). Refer to the ox documentation for the full reference.
:::

## `MlDsa44.InvalidContextSizeError`

Thrown when a context string exceeds the 255-byte FIPS 204 limit.

## `MlDsa44.InvalidPrfSizeError`

Thrown when a WebAuthn PRF output is not 32 bytes.