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https://github.com/xfarrow/blink
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Change endpoint from persons to people
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88
backend/apis/nodejs/node_modules/pg/lib/crypto/utils-webcrypto.js
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vendored
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88
backend/apis/nodejs/node_modules/pg/lib/crypto/utils-webcrypto.js
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@ -0,0 +1,88 @@
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const nodeCrypto = require('crypto')
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module.exports = {
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postgresMd5PasswordHash,
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randomBytes,
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deriveKey,
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sha256,
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hashByName,
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hmacSha256,
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md5,
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}
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/**
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* The Web Crypto API - grabbed from the Node.js library or the global
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* @type Crypto
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*/
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const webCrypto = nodeCrypto.webcrypto || globalThis.crypto
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/**
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* The SubtleCrypto API for low level crypto operations.
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* @type SubtleCrypto
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*/
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const subtleCrypto = webCrypto.subtle
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const textEncoder = new TextEncoder()
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/**
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*
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* @param {*} length
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* @returns
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*/
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function randomBytes(length) {
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return webCrypto.getRandomValues(Buffer.alloc(length))
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}
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async function md5(string) {
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try {
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return nodeCrypto.createHash('md5').update(string, 'utf-8').digest('hex')
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} catch (e) {
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// `createHash()` failed so we are probably not in Node.js, use the WebCrypto API instead.
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// Note that the MD5 algorithm on WebCrypto is not available in Node.js.
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// This is why we cannot just use WebCrypto in all environments.
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const data = typeof string === 'string' ? textEncoder.encode(string) : string
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const hash = await subtleCrypto.digest('MD5', data)
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return Array.from(new Uint8Array(hash))
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.map((b) => b.toString(16).padStart(2, '0'))
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.join('')
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}
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}
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// See AuthenticationMD5Password at https://www.postgresql.org/docs/current/static/protocol-flow.html
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async function postgresMd5PasswordHash(user, password, salt) {
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var inner = await md5(password + user)
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var outer = await md5(Buffer.concat([Buffer.from(inner), salt]))
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return 'md5' + outer
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}
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/**
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* Create a SHA-256 digest of the given data
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* @param {Buffer} data
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*/
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async function sha256(text) {
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return await subtleCrypto.digest('SHA-256', text)
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}
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async function hashByName(hashName, text) {
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return await subtleCrypto.digest(hashName, text)
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}
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/**
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* Sign the message with the given key
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* @param {ArrayBuffer} keyBuffer
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* @param {string} msg
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*/
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async function hmacSha256(keyBuffer, msg) {
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const key = await subtleCrypto.importKey('raw', keyBuffer, { name: 'HMAC', hash: 'SHA-256' }, false, ['sign'])
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return await subtleCrypto.sign('HMAC', key, textEncoder.encode(msg))
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}
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/**
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* Derive a key from the password and salt
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* @param {string} password
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* @param {Uint8Array} salt
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* @param {number} iterations
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*/
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async function deriveKey(password, salt, iterations) {
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const key = await subtleCrypto.importKey('raw', textEncoder.encode(password), 'PBKDF2', false, ['deriveBits'])
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const params = { name: 'PBKDF2', hash: 'SHA-256', salt: salt, iterations: iterations }
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return await subtleCrypto.deriveBits(params, key, 32 * 8, ['deriveBits'])
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}
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