compiler/rustc_codegen_cranelift/patches/bcryptprimitives.rs


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// Shim for bcryptprimitives.dll. The Wine version shipped with Ubuntu 22.04
// doesn't support it yet. Authored by @ChrisDenton

#![crate_type = "cdylib"]
#![allow(nonstandard_style)]

#[no_mangle]
pub unsafe extern "system" fn ProcessPrng(mut pbData: *mut u8, mut cbData: usize) -> i32 {
    while cbData > 0 {
        let size = core::cmp::min(cbData, u32::MAX as usize);
        RtlGenRandom(pbData, size as u32);
        cbData -= size;
        pbData = pbData.add(size);
    }
    1
}

#[link(name = "advapi32")]
extern "system" {
    #[link_name = "SystemFunction036"]
    pub fn RtlGenRandom(RandomBuffer: *mut u8, RandomBufferLength: u32) -> u8;
}