Zoe
cfab3d0b8f
Once again a weird place to commit, I have already done a lot of work, but I am just bad at using git, okay.
32 lines
1.1 KiB
Zig
32 lines
1.1 KiB
Zig
const std = @import("std");
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const Allocator = std.mem.Allocator;
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var argon2_params = std.crypto.pwhash.argon2.Params{
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.t = 4, // time cost
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.m = 256, // memory cost (in KiB)
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.p = 1, // parallelism (this doesnt do anything because we are targeting wasm, and we do multithreading differently anyways)
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};
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const dk_len: usize = 32; // 16 or 32 byte key
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var derived: [dk_len]u8 = undefined;
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var buffer_hash_hex: [64]u8 = undefined;
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fn bytesToHex(bytes: []const u8, output: []u8) void {
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const hex_chars = "0123456789abcdef";
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var i: usize = 0;
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while (i < bytes.len) : (i += 1) {
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output[i * 2] = hex_chars[(bytes[i] >> 4)];
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output[i * 2 + 1] = hex_chars[bytes[i] & 0x0F];
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}
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}
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pub fn hash(allocator: Allocator, challenge: []const u8, nonce: []const u8) ![]u8 {
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try std.crypto.pwhash.argon2.kdf(allocator, &derived, nonce, challenge, argon2_params, .argon2id);
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var hash_bytes: [32]u8 = undefined;
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std.crypto.hash.sha2.Sha256.hash(&derived, @ptrCast(hash_bytes[0..].ptr), .{});
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bytesToHex(&hash_bytes, &buffer_hash_hex);
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return buffer_hash_hex[0..];
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}
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