Add more from the std

library/std/src/sys/random/mod.rs

@@ -0,0 +1,134 @@
+cfg_select! {
+    // Tier 1
+    any(target_os = "linux", target_os = "android") => {
+        mod linux;
+        pub use linux::{fill_bytes, hashmap_random_keys};
+    }
+    target_os = "windows" => {
+        mod windows;
+        pub use windows::fill_bytes;
+    }
+    target_vendor = "apple" => {
+        mod apple;
+        pub use apple::fill_bytes;
+    // Others, in alphabetical ordering.
+    }
+    any(
+        target_os = "dragonfly",
+        target_os = "freebsd",
+        target_os = "haiku",
+        target_os = "illumos",
+        target_os = "netbsd",
+        target_os = "openbsd",
+        target_os = "rtems",
+        target_os = "solaris",
+        target_os = "vita",
+        target_os = "nuttx",
+    ) => {
+        mod arc4random;
+        pub use arc4random::fill_bytes;
+    }
+    target_os = "emscripten" => {
+        mod getentropy;
+        pub use getentropy::fill_bytes;
+    }
+    target_os = "espidf" => {
+        mod espidf;
+        pub use espidf::fill_bytes;
+    }
+    target_os = "fuchsia" => {
+        mod fuchsia;
+        pub use fuchsia::fill_bytes;
+    }
+    target_os = "hermit" => {
+        mod hermit;
+        pub use hermit::fill_bytes;
+    }
+    any(target_os = "horizon", target_os = "cygwin") => {
+        // FIXME(horizon): add arc4random_buf to shim-3ds
+        mod getrandom;
+        pub use getrandom::fill_bytes;
+    }
+    any(
+        target_os = "aix",
+        target_os = "hurd",
+        target_os = "l4re",
+        target_os = "nto",
+    ) => {
+        mod unix_legacy;
+        pub use unix_legacy::fill_bytes;
+    }
+    target_os = "redox" => {
+        mod redox;
+        pub use redox::fill_bytes;
+    }
+    target_os = "motor" => {
+        mod motor;
+        pub use motor::fill_bytes;
+    }
+    all(target_vendor = "fortanix", target_env = "sgx") => {
+        mod sgx;
+        pub use sgx::fill_bytes;
+    }
+    target_os = "solid_asp3" => {
+        mod solid;
+        pub use solid::fill_bytes;
+    }
+    target_os = "teeos" => {
+        mod teeos;
+        pub use teeos::fill_bytes;
+    }
+    target_os = "trusty" => {
+        mod trusty;
+        pub use trusty::fill_bytes;
+    }
+    target_os = "uefi" => {
+        mod uefi;
+        pub use uefi::fill_bytes;
+    }
+    target_os = "vxworks" => {
+        mod vxworks;
+        pub use vxworks::fill_bytes;
+    }
+    all(target_os = "wasi", target_env = "p1") => {
+        mod wasip1;
+        pub use wasip1::fill_bytes;
+    }
+    all(target_os = "wasi", any(target_env = "p2", target_env = "p3")) => {
+        mod wasip2;
+        pub use wasip2::{fill_bytes, hashmap_random_keys};
+    }
+    target_os = "zkvm" => {
+        mod zkvm;
+        pub use zkvm::fill_bytes;
+    }
+    any(
+        all(target_family = "wasm", target_os = "unknown"),
+        target_os = "xous",
+        target_os = "vexos",
+target_os = "survos",
+    ) => {
+        // FIXME: finally remove std support for wasm32-unknown-unknown
+        // FIXME: add random data generation to xous
+        mod unsupported;
+        pub use unsupported::{fill_bytes, hashmap_random_keys};
+    }
+    _ => {}
+}
+
+#[cfg(not(any(
+    target_os = "linux",
+    target_os = "android",
+    all(target_family = "wasm", target_os = "unknown"),
+    all(target_os = "wasi", not(target_env = "p1")),
+    target_os = "xous",
+    target_os = "vexos",
+target_os = "survos",
+)))]
+pub fn hashmap_random_keys() -> (u64, u64) {
+    let mut buf = [0; 16];
+    fill_bytes(&mut buf);
+    let k1 = u64::from_ne_bytes(buf[..8].try_into().unwrap());
+    let k2 = u64::from_ne_bytes(buf[8..].try_into().unwrap());
+    (k1, k2)
+}