Asynchronous Hash Request Handle
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## Asynchronous Hash Request Handle

The ahash_request data structure contains all pointers to data required for the asynchronous cipher operation. This includes the cipher handle (which can be used by multiple ahash_request instances), pointer to plaintext and the message digest output buffer, asynchronous callback function, etc. It acts as a handle to the ahash_request_* API calls in a similar way as ahash handle to the crypto_ahash_* API calls.

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