Separate RNG library (#470)

* seperates the RNG library

* fixes crypto tests

* adds rng256 workflow

* fixes formatting

src/ctap/client_pin.rs

@@ -28,11 +28,11 @@ use alloc::str;
 use alloc::string::String;
 use alloc::vec::Vec;
 use crypto::hmac::hmac_256;
-use crypto::rng256::Rng256;
 use crypto::sha256::Sha256;
 use crypto::Hash256;
 #[cfg(test)]
 use enum_iterator::IntoEnumIterator;
+use rng256::Rng256;
 use subtle::ConstantTimeEq;
 
 /// The prefix length of the PIN hash that is stored and compared.

src/ctap/credential_management.rs

@@ -364,7 +364,7 @@ mod test {
     use super::super::CtapState;
     use super::*;
     use crate::env::test::TestEnv;
-    use crypto::rng256::Rng256;
+    use rng256::Rng256;
 
     const DUMMY_CHANNEL: Channel = Channel::MainHid([0x12, 0x34, 0x56, 0x78]);
 

src/ctap/crypto_wrapper.rs

@@ -15,7 +15,7 @@
 use crate::ctap::status_code::Ctap2StatusCode;
 use alloc::vec::Vec;
 use crypto::cbc::{cbc_decrypt, cbc_encrypt};
-use crypto::rng256::Rng256;
+use rng256::Rng256;
 
 /// Wraps the AES256-CBC encryption to match what we need in CTAP.
 pub fn aes256_cbc_encrypt(

src/ctap/data_formats.rs

@@ -1226,8 +1226,8 @@ mod test {
         cbor_array, cbor_bool, cbor_bytes, cbor_bytes_lit, cbor_false, cbor_int, cbor_null,
         cbor_text, cbor_unsigned,
     };
-    use crypto::rng256::Rng256;
     use crypto::sha256::Sha256;
+    use rng256::Rng256;
 
     #[test]
     fn test_extract_unsigned() {

src/ctap/mod.rs

@@ -77,10 +77,10 @@ use arrayref::array_ref;
 use byteorder::{BigEndian, ByteOrder};
 use core::convert::TryFrom;
 use crypto::hmac::{hmac_256, verify_hmac_256};
-use crypto::rng256::Rng256;
 use crypto::sha256::Sha256;
 use crypto::{ecdsa, Hash256};
 use embedded_time::duration::Milliseconds;
+use rng256::Rng256;
 use sk_cbor as cbor;
 use sk_cbor::cbor_map_options;
 

src/ctap/pin_protocol.rs

@@ -23,9 +23,9 @@ use crypto::hkdf::hkdf_empty_salt_256;
 #[cfg(test)]
 use crypto::hmac::hmac_256;
 use crypto::hmac::{verify_hmac_256, verify_hmac_256_first_128bits};
-use crypto::rng256::Rng256;
 use crypto::sha256::Sha256;
 use crypto::Hash256;
+use rng256::Rng256;
 
 /// Implements common functions between existing PIN protocols for handshakes.
 pub struct PinProtocol {

src/ctap/storage.rs

@@ -30,8 +30,8 @@ use alloc::vec::Vec;
 use arrayref::array_ref;
 use core::cmp;
 use core::convert::TryInto;
-use crypto::rng256::Rng256;
 use persistent_store::{fragment, StoreUpdate};
+use rng256::Rng256;
 use sk_cbor::cbor_array_vec;
 
 /// Wrapper for master keys.
@@ -729,7 +729,7 @@ mod test {
     use super::*;
     use crate::ctap::data_formats::{PublicKeyCredentialSource, PublicKeyCredentialType};
     use crate::env::test::TestEnv;
-    use crypto::rng256::Rng256;
+    use rng256::Rng256;
 
     fn create_credential_source(
         rng: &mut impl Rng256,