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Enable sharing of master cross-signing key

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We've realised it's beneficial to support sharing the master cross-singing key
so that new devices can fully manage cross-signing on your account.

Part of https://github.com/vector-im/element-web/issues/13896
This commit is contained in:
J. Ryan Stinnett 2020-08-06 15:10:47 +01:00
parent 0da31de5ad
commit 060f2cf54f
1 changed files with 7 additions and 17 deletions
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24
src/CrossSigningManager.js
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@ -132,24 +132,14 @@ const onSecretRequested = async function({
if (name.startsWith("m.cross_signing")) {
const callbacks = client.getCrossSigningCacheCallbacks();
if (!callbacks.getCrossSigningKeyCache) return;
/* Explicit enumeration here is deliberate – never share the master key! */
if (name === "m.cross_signing.self_signing") {
const key = await callbacks.getCrossSigningKeyCache("self_signing");
if (!key) {
console.log(
`self_signing requested by ${deviceId}, but not found in cache`,
);
}
return key && encodeBase64(key);
} else if (name === "m.cross_signing.user_signing") {
const key = await callbacks.getCrossSigningKeyCache("user_signing");
if (!key) {
console.log(
`user_signing requested by ${deviceId}, but not found in cache`,
);
}
return key && encodeBase64(key);
const keyId = name.replace("m.cross_signing.", "");
const key = await callbacks.getCrossSigningKeyCache(keyId);
if (!key) {
console.log(
`${keyId} requested by ${deviceId}, but not found in cache`,
);
}
return key && encodeBase64(key);
} else if (name === "m.megolm_backup.v1") {
const key = await client._crypto.getSessionBackupPrivateKey();
if (!key) {