1cfg_if::cfg_if! {
2 // Tier 1
3 if #[cfg(any(target_os = "linux", target_os = "android"))] {
4 mod linux;
5 pub use linux::{fill_bytes, hashmap_random_keys};
6 } else if #[cfg(target_os = "windows")] {
7 mod windows;
8 pub use windows::fill_bytes;
9 } else if #[cfg(target_vendor = "apple")] {
10 mod apple;
11 pub use apple::fill_bytes;
12 // Others, in alphabetical ordering.
13 } else if #[cfg(any(
14 target_os = "dragonfly",
15 target_os = "freebsd",
16 target_os = "haiku",
17 target_os = "illumos",
18 target_os = "netbsd",
19 target_os = "openbsd",
20 target_os = "rtems",
21 target_os = "solaris",
22 target_os = "vita",
23 ))] {
24 mod arc4random;
25 pub use arc4random::fill_bytes;
26 } else if #[cfg(target_os = "emscripten")] {
27 mod getentropy;
28 pub use getentropy::fill_bytes;
29 } else if #[cfg(target_os = "espidf")] {
30 mod espidf;
31 pub use espidf::fill_bytes;
32 } else if #[cfg(target_os = "fuchsia")] {
33 mod fuchsia;
34 pub use fuchsia::fill_bytes;
35 } else if #[cfg(target_os = "hermit")] {
36 mod hermit;
37 pub use hermit::fill_bytes;
38 } else if #[cfg(any(target_os = "horizon", target_os = "cygwin"))] {
39 // FIXME(horizon): add arc4random_buf to shim-3ds
40 mod getrandom;
41 pub use getrandom::fill_bytes;
42 } else if #[cfg(any(
43 target_os = "aix",
44 target_os = "hurd",
45 target_os = "l4re",
46 target_os = "nto",
47 target_os = "nuttx",
48 ))] {
49 mod unix_legacy;
50 pub use unix_legacy::fill_bytes;
51 } else if #[cfg(target_os = "redox")] {
52 mod redox;
53 pub use redox::fill_bytes;
54 } else if #[cfg(all(target_vendor = "fortanix", target_env = "sgx"))] {
55 mod sgx;
56 pub use sgx::fill_bytes;
57 } else if #[cfg(target_os = "solid_asp3")] {
58 mod solid;
59 pub use solid::fill_bytes;
60 } else if #[cfg(target_os = "teeos")] {
61 mod teeos;
62 pub use teeos::fill_bytes;
63 } else if #[cfg(target_os = "trusty")] {
64 mod trusty;
65 pub use trusty::fill_bytes;
66 } else if #[cfg(target_os = "uefi")] {
67 mod uefi;
68 pub use uefi::fill_bytes;
69 } else if #[cfg(target_os = "vxworks")] {
70 mod vxworks;
71 pub use vxworks::fill_bytes;
72 } else if #[cfg(target_os = "wasi")] {
73 mod wasi;
74 pub use wasi::fill_bytes;
75 } else if #[cfg(target_os = "zkvm")] {
76 mod zkvm;
77 pub use zkvm::fill_bytes;
78 } else if #[cfg(any(
79 all(target_family = "wasm", target_os = "unknown"),
80 target_os = "xous",
81 ))] {
82 // FIXME: finally remove std support for wasm32-unknown-unknown
83 // FIXME: add random data generation to xous
84 mod unsupported;
85 pub use unsupported::{fill_bytes, hashmap_random_keys};
86 }
87}
88
89#[cfg(not(any(
90 target_os = "linux",
91 target_os = "android",
92 all(target_family = "wasm", target_os = "unknown"),
93 target_os = "xous",
94)))]
95pub fn hashmap_random_keys() -> (u64, u64) {
96 let mut buf = [0; 16];
97 fill_bytes(&mut buf);
98 let k1 = u64::from_ne_bytes(buf[..8].try_into().unwrap());
99 let k2 = u64::from_ne_bytes(buf[8..].try_into().unwrap());
100 (k1, k2)
101}
102