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103 lines
2.8 KiB
TypeScript
103 lines
2.8 KiB
TypeScript
// Loaded from https://raw.githubusercontent.com/deno-postgres/deno-postgres/master/utils.ts
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import { createHash } from "./deps.ts";
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export function readInt16BE(buffer: Uint8Array, offset: number): number {
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offset = offset >>> 0;
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const val = buffer[offset + 1] | (buffer[offset] << 8);
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return val & 0x8000 ? val | 0xffff0000 : val;
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}
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export function readUInt16BE(buffer: Uint8Array, offset: number): number {
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offset = offset >>> 0;
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return buffer[offset] | (buffer[offset + 1] << 8);
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}
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export function readInt32BE(buffer: Uint8Array, offset: number): number {
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offset = offset >>> 0;
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return (
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(buffer[offset] << 24) |
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(buffer[offset + 1] << 16) |
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(buffer[offset + 2] << 8) |
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buffer[offset + 3]
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);
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}
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export function readUInt32BE(buffer: Uint8Array, offset: number): number {
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offset = offset >>> 0;
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return (
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buffer[offset] * 0x1000000 +
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((buffer[offset + 1] << 16) |
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(buffer[offset + 2] << 8) |
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buffer[offset + 3])
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);
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}
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const encoder = new TextEncoder();
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function md5(bytes: Uint8Array): string {
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return createHash("md5").update(bytes).toString("hex");
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}
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// https://www.postgresql.org/docs/current/protocol-flow.html
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// AuthenticationMD5Password
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// The actual PasswordMessage can be computed in SQL as:
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// concat('md5', md5(concat(md5(concat(password, username)), random-salt))).
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// (Keep in mind the md5() function returns its result as a hex string.)
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export function hashMd5Password(
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password: string,
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username: string,
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salt: Uint8Array,
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): string {
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const innerHash = md5(encoder.encode(password + username));
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const innerBytes = encoder.encode(innerHash);
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const outerBuffer = new Uint8Array(innerBytes.length + salt.length);
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outerBuffer.set(innerBytes);
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outerBuffer.set(salt, innerBytes.length);
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const outerHash = md5(outerBuffer);
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return "md5" + outerHash;
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}
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export interface DsnResult {
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driver: string;
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user: string;
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password: string;
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hostname: string;
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port: string;
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database: string;
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params: {
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[key: string]: string;
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};
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}
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export function parseDsn(dsn: string): DsnResult {
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//URL object won't parse the URL if it doesn't recognize the protocol
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//This line replaces the protocol with http and then leaves it up to URL
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const [protocol, strippedUrl] = dsn.match(/(?:(?!:\/\/).)+/g) ?? ["", ""];
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const url = new URL(`http:${strippedUrl}`);
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return {
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driver: protocol,
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user: url.username,
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password: url.password,
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hostname: url.hostname,
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port: url.port,
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// remove leading slash from path
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database: url.pathname.slice(1),
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params: Object.fromEntries(url.searchParams.entries()),
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};
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}
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export function isTemplateString(
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// deno-lint-ignore no-explicit-any
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template: any,
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): template is TemplateStringsArray {
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if (!Array.isArray(template)) {
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return false;
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}
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return true;
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}
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