mbedtls 0.13.5

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. */

pub mod ctr_drbg;
pub mod hmac_drbg;
#[cfg(sys_std_component = "entropy")]
pub mod os_entropy;
#[cfg(any(feature = "rdrand", target_env = "sgx", target_env = "fortanixvme"))]
mod rdrand;

#[doc(inline)]
pub use self::ctr_drbg::CtrDrbg;
#[doc(inline)]
pub use self::hmac_drbg::HmacDrbg;
#[cfg(sys_std_component = "entropy")]
#[doc(inline)]
pub use self::os_entropy::OsEntropy;
#[cfg(any(feature = "rdrand", target_env = "sgx", target_env = "fortanixvme"))]
pub use self::rdrand::{Entropy as Rdseed, Nrbg as Rdrand};

use crate::error::{IntoResult, Result};
use mbedtls_sys::types::raw_types::{c_int, c_uchar};
use mbedtls_sys::types::size_t;

callback!(EntropyCallbackMut,EntropyCallback(data: *mut c_uchar, len: size_t) -> c_int);
callback!(RngCallbackMut,RngCallback(data: *mut c_uchar, len: size_t) -> c_int);

pub trait Random: RngCallback {
    fn random(&mut self, data: &mut [u8]) -> Result<()>
    where
        Self: Sized,
    {
        unsafe { Self::call(self.data_ptr(), data.as_mut_ptr(), data.len()) }.into_result()?;
        Ok(())
    }
}

impl<'r, F: RngCallback> Random for F {}