| // Copyright 2021 The Pigweed Authors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); you may not |
| // use this file except in compliance with the License. You may obtain a copy of |
| // the License at |
| // |
| // https://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| // License for the specific language governing permissions and limitations under |
| // the License. |
| |
| #pragma once |
| |
| #include "pw_bytes/span.h" |
| #include "pw_status/status.h" |
| |
| namespace pw::tls_client { |
| // Fill |dest| with fresh, full-entropy random bytes upon each call. |
| // |dest| must contain full entropy. Backend should take care of the possible |
| // conditioning in its implementation. |
| Status GetRandomBytes(ByteSpan dest); |
| |
| // An overloaded variant for accomodating C API interfaces, i.e. mbed TLS. |
| inline Status GetRandomBytes(std::span<unsigned char> dest) { |
| return GetRandomBytes(std::as_writable_bytes(dest)); |
| } |
| } // namespace pw::tls_client |
