# MlDsa44 Errors

## `MlDsa44.InvalidContextSizeError`

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

**Source:** [src/core/MlDsa44.ts](https://github.com/wevm/ox/blob/main/src/core/MlDsa44.ts#L370)

## `MlDsa44.InvalidPrfSizeError`

Thrown when a WebAuthn PRF output is not 32 bytes.

**Source:** [src/core/MlDsa44.ts](https://github.com/wevm/ox/blob/main/src/core/MlDsa44.ts#L387)