signalapp/libsignal-protocol-javascript
signalapp/libsignal-protocol-javascript
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Throw error if asked to jump forward in chain by over 2000 (#43)

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As libsignal-protocol-java has had for more than three years. This check
was present when it was first pulled out into its own repo in late 2014:

60800e1556/src/main/java/org/whispersystems/libaxolotl/SessionCipher.java (L383)
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Scott Nonnenberg 2018-02-14 11:35:16 -08:00 committed by GitHub
parent 5679fe7a49
commit d08705329a
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4
dist/libsignal-protocol.js vendored
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@ -36303,6 +36303,10 @@ SessionCipher.prototype = {
return Promise.resolve(); // Already calculated
}
if (counter - chain.chainKey.counter > 2000) {
throw new Error('Over 2000 messages into the future!');
}
if (chain.chainKey.key === undefined) {
throw new Error("Got invalid request to extend chain after it was already closed");
}

4
src/SessionCipher.js
View File

@ -287,6 +287,10 @@ SessionCipher.prototype = {
return Promise.resolve(); // Already calculated
}
if (counter - chain.chainKey.counter > 2000) {
throw new Error('Over 2000 messages into the future!');
}
if (chain.chainKey.key === undefined) {
throw new Error("Got invalid request to extend chain after it was already closed");
}