Zig 0.17.0-dev (Split by item)

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addEntropy

Inserts entropy to refresh the internal state.

ChaCha.addEntropy

pub fn addEntropy(self: *Self, bytes: []const u8) void

File

lib/std/Random/ChaCha.zig:29

Code

pub fn addEntropy(self: *Self, bytes: []const u8) void {
    var i: usize = 0;
    while (i + Cipher.key_length <= bytes.len) : (i += Cipher.key_length) {
        Cipher.xor(
            self.state[0..Cipher.key_length],
            self.state[0..Cipher.key_length],
            0,
            bytes[i..][0..Cipher.key_length].*,
            nonce,
        );
    }
    if (i < bytes.len) {
        var k: [Cipher.key_length]u8 = @splat(0);
        const src = bytes[i..];
        @memcpy(k[0..src.len], src);
        Cipher.xor(
            self.state[0..Cipher.key_length],
            self.state[0..Cipher.key_length],
            0,
            k,
            nonce,
        );
    }
    self.refill();
}