namerena-rs/wgpu-mine/main.wgsl
2024-04-28 23:46:55 +08:00

39 lines
1.2 KiB
WebGPU Shading Language

@group(0) @binding(0) var<uniform> first_step: array<vec4<u32>, 64>;
// 处理第二步的两次 rc4 名称, 输入名字 bytes, 从第一步得到的 val
@compute
@workgroup_size(16, 16)
fn rc4_name(name_bytes: array<u32, 256>, name_len: u32) -> array<u32, 256> {
// var val: array<u32, 256> = first_step;
var val: array<u32, 256> = array<u32, 256>();
// 把 first_step 的值复制到 val
// first_step 内当成连续的内存即可
for (var i: u32 = 0; i < 64; i = i + 1) {
val[i * 4] = first_step[i].x;
val[i * 4 + 1] = first_step[i].y;
val[i * 4 + 2] = first_step[i].z;
val[i * 4 + 3] = first_step[i].w;
}
// 上面的重复两次
for (var n: u32 = 0; n < 2; n++) {
var s: u32 = 0u;
var k: u32 = 0u;
for (var i: u32 = 0; i < 256; i = i + 1) {
if (k != 0) {
s = s + val[k - 1];
}
s = s + val[i];
s = s % 256u;
var tmp = val[i];
val[i] = val[s];
val[s] = tmp;
if (k == name_len - 1) {
k = 0u;
} else {
k++;
}
}
}
return val;
}