mbedtls 0.13.6

Idiomatic Rust wrapper for MbedTLS, allowing you to use MbedTLS with only safe code while being able to use such great Rust features like error handling and closures. Building on MbedTLS's focus on embedded use, this crate can be used in a no_std environment.
Documentation 
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/* Copyright (c) Fortanix, Inc.
 *
 * Licensed under the GNU General Public License, version 2 <LICENSE-GPL or
 * https://www.gnu.org/licenses/gpl-2.0.html> or the Apache License, Version
 * 2.0 <LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0>, at your
 * option. This file may not be copied, modified, or distributed except
 * according to those terms. */

cfg_if::cfg_if! {
    if #[cfg(any(feature = "rdrand", target_env = "sgx", target_env = "fortanixvme"))] {
        pub fn entropy_new() -> crate::mbedtls::rng::Rdseed {
            crate::mbedtls::rng::Rdseed
        }
    } else if #[cfg(feature = "std")] {
        pub fn entropy_new() -> crate::mbedtls::rng::OsEntropy {
            crate::mbedtls::rng::OsEntropy::new()
        }
    } else {
        pub fn entropy_new() -> ! {
            panic!("Unable to run test without entropy source")
        }
    }
}