43 lines
1.0 KiB
JavaScript
43 lines
1.0 KiB
JavaScript
import SsrAuthChainPreset from './ssr-auth-chain';
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/**
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* @description
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* shadowsocksr "auth_chain_a" implementation.
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*
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* @notice
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* This preset should be used together with "ss-base" and "ss-stream-cipher".
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*
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* @examples
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* [
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* {"name": "ss-base"},
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* {"name": "ssr-auth-chain-a"},
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* {"name": "ss-stream-cipher","params": {"method": "aes-128-ctr"}}
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* ]
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*/
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export default class SsrAuthChainAPreset extends SsrAuthChainPreset {
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constructor(props) {
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super(props);
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this._salt = 'auth_chain_a';
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}
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getRandomBytesLengthForTcp(seed, base, rng) {
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if (base > 1440) {
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return 0;
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}
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rng.init_from_bin_datalen(seed, base);
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let random_bytes_len;
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if (base > 1300) {
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random_bytes_len = rng.next().mod(31);
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} else if (base > 900) {
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random_bytes_len = rng.next().mod(127);
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} else if (base > 400) {
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random_bytes_len = rng.next().mod(521);
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} else {
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random_bytes_len = rng.next().mod(1021);
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}
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return random_bytes_len.toNumber();
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}
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}
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