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refactoring contexts

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This commit is contained in:
Roland Osborne 2023-01-03 23:47:33 -08:00
parent 36685f6051
commit fbd46b3f3f
1 changed files with 74 additions and 0 deletions
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74
net/web/src/util/sealUtil.js Normal file
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import CryptoJS from 'crypto-js';
import { JSEncrypt } from 'jsencrypt'
export function isUnsealed(subject, sealKey) {
const { seals } = JSON.parse(subject);
for (let i = 0; i < seals?.length; i++) {
if (seals[i].publicKey === sealKey.public) {
return sealKey.private != null;
}
}
return false;
}
export function getContentKey(subject, sealKey) {
for (let i = 0; i < seal?.length; i++) {
if (seal[i].publicKey === sealKey.public) {
let crypto = new JSEncrypt();
crypto.setPrivateKey(sealKey.private);
return crypto.decrypt(seal.sealedKey);
}
}
throw new Error("unsealKey not available");
}
export function encryptChannelSubject(subject, publicKeys) {
const key = CryptoJS.lib.WordArray.random(256 / 8);
const iv = CryptoJS.lib.WordArray.random(128 / 8);
const encrypted = CryptoJS.AES.encrypt(JSON.stringify({ subject }), key, { iv: iv });
const subjectEncrypted = encrypted.ciphertext.toString(CryptoJS.enc.Base64)
const subjectIv = iv.toString();
const keyHex = key.toString();
let seals = [];
let crypto = new JSEncrypt();
publicKeys.forEach(key => {
crypto.setPublicKey(key);
const sealedKey = crypto.encrypt(keyHex);
seals.push({ publicKey, sealedKey });
});
return { subjectEncrypted, subjectIv, seals };
}
export function decryptChannelSubject(subject, sealKey) {
const { subjectEncrypted, subjectIv, seals } = JSON.parse(subject);
const contentKey = getContentKey(seals, sealKey);
const iv = CryptoJS.enc.Hex.parse(subjectIv);
const key = CryptoJS.enc.Hex.parse(contentKey);
const enc = CryptoJS.enc.Base64.parse(subjectEncrypted);
const cipher = CryptoJS.lib.CipherParams.create({ ciphertext: enc, iv: iv });
const dec = CryptoJS.AES.decrypt(cipher, key, { iv: iv });
return JSON.parse(dec.toString(CryptoJS.enc.Utf8));
}
export function encryptTopicSubject(subject, contentKey) {
const iv = CryptoJS.lib.WordArray.random(128 / 8);
const key = CryptoJS.enc.Hex.parse(contentKey);
const encrypted = CryptoJS.AES.encrypt(JSON.stringify({ subject }), key, { iv: iv });
const messageEncrypted = encrypted.ciphertext.toString(CryptoJS.enc.Base64)
const messageIv = iv.toString();
return { messageEncrypted, messageIv };
}
export function decryptTopicSubject(subject, contentKey) {
const { messageEncrypted, messageIv } = JSON.parse(subject);
const iv = CryptoJS.enc.Hex.parse(messageIv);
const key = CryptoJS.enc.Hex.parse(contentKey);
const enc = CryptoJS.enc.Base64.parse(messageEncrypted);
let cipher = CryptoJS.lib.CipherParams.create({ ciphertext: enc, iv: iv });
const dec = CryptoJS.AES.decrypt(cipher, key, { iv: iv });
return JSON.parse(dec.toString(CryptoJS.enc.Utf8));
}