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const { EventEmitter } = require('events');
const { randomBytes } = require('crypto');
class KeyState extends EventEmitter {
constructor() {
super();
this.keys_by_uri = new Map()
this.keys_by_issuer_id = new Map();
}
}
class PubKeyStoreMemory extends EventEmitter {
constructor(options, cb) {
super();
if (options.share_keys_with) {
this._state = options.share_keys_with._state;
} else {
this._state = new KeyState();
}
this._changes = !options.no_changes;
if (this._changes) {
this._change_listener = (uri, rev, deleted) => {
this.emit('change', uri, rev, deleted);
};
this._state.on('change', this._change_listener);
}
this._deploy_listener = store => {
if (store !== this) {
this.replicate();
}
};
this._state.on('deploy', this._deploy_listener);
this._no_updates = options.no_updates;
this._open = true;
cb(null, this);
}
close(cb) {
cb = cb || (() => {});
if (!this._open) {
return cb(new Error('not_open'));
}
if (this._changes) {
this._state.removeListener('change', this._change_listener);
}
this._state.removeListener('deploy', this._deploy_listener);
this._open = false;
cb();
}
get_pub_key_by_uri(uri, cb) {
cb = cb || (() => {});
if (!this._open) {
return cb(new Error('not_open'));
}
const entry = this._state.keys_by_uri.get(uri);
if (!entry) {
return cb(null, null);
}
cb(null, entry.pub_key, entry.issuer_id, entry.rev);
}
get_pub_key_by_issuer_id(issuer_id, cb) {
cb = cb || (() => {});
if (!this._open) {
return cb(new Error('not_open'));
}
const entry = this._state.keys_by_issuer_id.get(issuer_id);
if (!entry) {
return cb(null, null);
}
cb(null, entry.pub_key, entry.uri, entry.rev);
}
get_issuer_id(uri, cb) {
cb = cb || (() => {});
if (!this._open) {
return cb(new Error('not_open'));
}
const entry = this._state.keys_by_uri.get(uri);
if (!entry) {
return cb(null, null);
}
cb(null, entry.issuer_id, entry.rev);
}
get_uris(cb) {
cb = cb || (() => {});
if (!this._open) {
return cb(new Error('not_open'));
}
cb(null, Array.from(this._state.keys_by_uri.keys()));
}
add_pub_key(uri, pub_key, options, cb) {
if (typeof options == 'function') {
cb = options;
options = {};
}
options = options || {};
cb = cb || (() => {});
if (!this._open) {
return cb(new Error('not_open'));
}
if ((uri === null) || (uri === undefined)) {
return cb(new Error('invalid_uri'));
}
const issuer_id = randomBytes(64).toString('hex');
const rev = randomBytes(64).toString('hex');
const entry = this._state.keys_by_uri.get(uri);
if (entry) {
if (this._no_updates && !options.allow_update) {
const err = new Error('already exists');
err.statusCode = 409;
err.error = 'conflict';
return cb(err);
}
this._state.keys_by_issuer_id.delete(entry.issuer_id);
entry.issuer_id = issuer_id;
entry.pub_key = pub_key;
entry.rev = rev;
this._state.keys_by_issuer_id.set(issuer_id, entry);
this._state.emit('change', uri, rev, false);
return cb(null, issuer_id, entry.rev);
}
const new_entry = { uri, issuer_id, pub_key, rev };
this._state.keys_by_uri.set(uri, new_entry);
this._state.keys_by_issuer_id.set(issuer_id, new_entry);
this._state.emit('change', uri, rev, false);
cb(null, issuer_id, rev);
}
remove_pub_key(uri, cb) {
cb = cb || (() => {});
if (!this._open) {
return cb(new Error('not_open'));
}
if ((uri === null) || (uri === undefined)) {
return cb(new Error('invalid_uri'));
}
const entry = this._state.keys_by_uri.get(uri);
if (entry) {
this._state.keys_by_uri.delete(uri);
this._state.keys_by_issuer_id.delete(entry.issuer_id);
this._state.emit('change', uri, randomBytes(64).toString('hex'), true);
}
cb();
}
create(cb) {
cb = cb || (() => {});
if (!this._open) {
return cb(new Error('not_open'));
}
cb();
}
destroy(cb) {
cb = cb || (() => {});
if (!this._open) {
return cb(new Error('not_open'));
}
this._state.keys_by_uri.clear();
this._state.keys_by_issuer_id.clear();
this.close(cb);
}
replicate(opts, cb) {
(typeof opts !== 'function') || (cb = opts);
cb = cb || (() => {});
if (!this._open) {
return cb(new Error('not_open'));
}
this.emit('replicated', cb => cb());
cb();
}
deploy(cb) {
this._state.emit('deploy', this);
!cb || cb();
}
}
module.exports = function (config, cb) {
new PubKeyStoreMemory(config, cb);
};
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