Initial vendor packages

Signed-off-by: Valentin Popov <valentin@popov.link>

vendor/fuchsia-cprng/.cargo-checksum.json

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+{"files":{"AUTHORS":"f82920a5bcfc71b86c1de4be4cdea8af2009ba9e5735824f95ed5043a03e46f0","Cargo.toml":"bb2497b2907c3af499ce7ac3722dae044968e13409a372b7760150f8a01c74c5","LICENSE":"03b114f53e6587a398931762ee11e2395bfdba252a329940e2c8c9e81813845b","PATENTS":"52beb3ac72a0e7f5060384d16e4e6f91573016448fbff363c0b01a66fe99f547","src/lib.rs":"3d76c35c13203093ddf7ce2a3be5e98d768a8091cd9d99bd083fe8db35364096"},"package":"a06f77d526c1a601b7c4cdd98f54b5eaabffc14d5f2f0296febdc7f357c6d3ba"}

vendor/fuchsia-cprng/AUTHORS

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+# This is the list of Fuchsia Authors.
+
+# Names should be added to this file as one of
+#     Organization's name
+#     Individual's name <submission email address>
+#     Individual's name <submission email address> <email2> <emailN>
+
+Google Inc.
+The Chromium Authors
+The Go Authors

vendor/fuchsia-cprng/Cargo.toml

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+# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
+#
+# When uploading crates to the registry Cargo will automatically
+# "normalize" Cargo.toml files for maximal compatibility
+# with all versions of Cargo and also rewrite `path` dependencies
+# to registry (e.g. crates.io) dependencies
+#
+# If you believe there's an error in this file please file an
+# issue against the rust-lang/cargo repository. If you're
+# editing this file be aware that the upstream Cargo.toml
+# will likely look very different (and much more reasonable)
+
+[package]
+edition = "2018"
+name = "fuchsia-cprng"
+version = "0.1.1"
+authors = ["Erick Tryzelaar <etryzelaar@google.com>"]
+include = ["src/*.rs", "Cargo.toml", "AUTHORS", "LICENSE", "PATENTS"]
+description = "Rust crate for the Fuchsia cryptographically secure pseudorandom number generator"
+readme = "README.md"
+license-file = "LICENSE"
+repository = "https://fuchsia.googlesource.com/fuchsia/+/master/garnet/public/rust/fuchsia-cprng"

vendor/fuchsia-cprng/LICENSE

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+Copyright 2019 The Fuchsia Authors. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

vendor/fuchsia-cprng/PATENTS

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+Additional IP Rights Grant (Patents)
+
+"This implementation" means the copyrightable works distributed by
+Google as part of the Fuchsia project.
+
+Google hereby grants to you a perpetual, worldwide, non-exclusive,
+no-charge, royalty-free, irrevocable (except as stated in this
+section) patent license to make, have made, use, offer to sell, sell,
+import, transfer, and otherwise run, modify and propagate the contents
+of this implementation of Fuchsia, where such license applies only to
+those patent claims, both currently owned by Google and acquired in
+the future, licensable by Google that are necessarily infringed by
+this implementation. This grant does not include claims that would be
+infringed only as a consequence of further modification of this
+implementation. If you or your agent or exclusive licensee institute
+or order or agree to the institution of patent litigation or any other
+patent enforcement activity against any entity (including a
+cross-claim or counterclaim in a lawsuit) alleging that this
+implementation of Fuchsia constitutes direct or contributory patent
+infringement, or inducement of patent infringement, then any patent
+rights granted to you under this License for this implementation of
+Fuchsia shall terminate as of the date such litigation is filed.

vendor/fuchsia-cprng/src/lib.rs

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+// Copyright 2019 The Fuchsia Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+//! Type-safe bindings for the Zircon kernel's CPRNG.
+
+#![no_std]
+#![deny(warnings)]
+
+/// Draw random bytes from the kernel's CPRNG to fill the given buffer.
+///
+/// Wraps the
+/// [zx_cprng_draw](https://fuchsia.googlesource.com/fuchsia/+/master/zircon/docs/syscalls/cprng_draw.md)
+/// syscall.
+pub fn cprng_draw(buffer: &mut [u8]) {
+    unsafe { zx_cprng_draw(buffer.as_mut_ptr(), buffer.len()) };
+}
+
+#[link(name = "zircon")]
+extern "C" {
+    fn zx_cprng_draw(buffer: *mut u8, length: usize);
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn cprng() {
+        let mut buffer = [0; 20];
+        cprng_draw(&mut buffer);
+        let mut first_zero = 0;
+        let mut last_zero = 0;
+        for _ in 0..30 {
+            let mut buffer = [0; 20];
+            cprng_draw(&mut buffer);
+            if buffer[0] == 0 {
+                first_zero += 1;
+            }
+            if buffer[19] == 0 {
+                last_zero += 1;
+            }
+        }
+        assert_ne!(first_zero, 30);
+        assert_ne!(last_zero, 30);
+    }
+
+    #[test]
+    fn cprng_large() {
+        let mut buffer = [0; 1024];
+        cprng_draw(&mut buffer);
+
+        for mut s in buffer.chunks_mut(256) {
+            cprng_draw(&mut s);
+        }
+    }
+}