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- Exceptions
- ==========
- .. currentmodule:: cryptography.exceptions
- .. class:: UnsupportedAlgorithm
- Raised when the requested algorithm, or combination of algorithms is not
- supported.
- .. class:: AlreadyFinalized
- This is raised when a context is used after being finalized.
- .. class:: InvalidSignature
- This is raised when signature verification fails. This can occur with
- HMAC or asymmetric key signature validation.
- .. class:: NotYetFinalized
- This is raised when the AEAD tag property is accessed on a context
- before it is finalized.
- .. class:: AlreadyUpdated
- This is raised when additional data is added to a context after update
- has already been called.
- .. class:: InvalidKey
- This is raised when the verify method of a key derivation function's
- computed key does not match the expected key.
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