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36 lines
1.3 KiB
36 lines
1.3 KiB
import parse from './parse.js'; |
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import { unsafeStringify } from './stringify.js'; |
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export function stringToBytes(str) { |
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str = unescape(encodeURIComponent(str)); |
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const bytes = new Uint8Array(str.length); |
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for (let i = 0; i < str.length; ++i) { |
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bytes[i] = str.charCodeAt(i); |
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} |
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return bytes; |
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} |
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export const DNS = '6ba7b810-9dad-11d1-80b4-00c04fd430c8'; |
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export const URL = '6ba7b811-9dad-11d1-80b4-00c04fd430c8'; |
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export default function v35(version, hash, value, namespace, buf, offset) { |
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const valueBytes = typeof value === 'string' ? stringToBytes(value) : value; |
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const namespaceBytes = typeof namespace === 'string' ? parse(namespace) : namespace; |
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if (typeof namespace === 'string') { |
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namespace = parse(namespace); |
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} |
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if (namespace?.length !== 16) { |
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throw TypeError('Namespace must be array-like (16 iterable integer values, 0-255)'); |
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} |
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let bytes = new Uint8Array(16 + valueBytes.length); |
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bytes.set(namespaceBytes); |
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bytes.set(valueBytes, namespaceBytes.length); |
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bytes = hash(bytes); |
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bytes[6] = (bytes[6] & 0x0f) | version; |
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bytes[8] = (bytes[8] & 0x3f) | 0x80; |
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if (buf) { |
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offset = offset || 0; |
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for (let i = 0; i < 16; ++i) { |
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buf[offset + i] = bytes[i]; |
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} |
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return buf; |
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} |
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return unsafeStringify(bytes); |
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}
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