Fix em_app vulnerability
#554
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The `encrypt_buffer` and `decrypt_buffer` functions use the `rustc_serialize::from_hex` function, but it is not constant time and leads to secret dependent control flow. These functions shouldn't have been in the API in the first place, and are removed.
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zugzwang
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gausk
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There is a (minor) security issue in
em-app. Theencrypt_bufferanddecrypt_bufferfunctions use therustc_serialize::from_hex()function on a cryptographic key, but from_hex has secret dependent control flow.This PR removes those functions and bumps the version of
em-appFixes #553