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