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Drop support for signaling key

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Fedor Indutny 2021-07-19 18:11:07 -07:00 • committed by GitHub
parent 31989a7706
commit 886e8966ff
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GPG key ID: 4AEE18F83AFDEB23
9 changed files with 5 additions and 85 deletions
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39
ts/textsecure/Crypto.ts
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@ -151,45 +151,6 @@ async function verifyDigest(
}
const Crypto = {
// Decrypts message into a raw string
async decryptWebsocketMessage(
decodedMessage: ArrayBuffer,
signalingKey: ArrayBuffer
): Promise<ArrayBuffer> {
if (signalingKey.byteLength !== 52) {
throw new Error('Got invalid length signalingKey');
}
if (decodedMessage.byteLength < 1 + 16 + 10) {
throw new Error('Got invalid length message');
}
if (new Uint8Array(decodedMessage)[0] !== 1) {
throw new Error(
`Got bad version number: ${new Uint8Array(decodedMessage)[0]}`
);
}
const aesKey = signalingKey.slice(0, 32);
const macKey = signalingKey.slice(32, 32 + 20);
const iv = decodedMessage.slice(1, 1 + 16);
const ciphertext = decodedMessage.slice(
1 + 16,
decodedMessage.byteLength - 10
);
const ivAndCiphertext = decodedMessage.slice(
0,
decodedMessage.byteLength - 10
);
const mac = decodedMessage.slice(
decodedMessage.byteLength - 10,
decodedMessage.byteLength
);
await verifyHmacSha256(ivAndCiphertext, macKey, mac, 10);
return decryptAes256CbcPkcsPadding(aesKey, ciphertext, iv);
},
async decryptAttachment(
encryptedBin: ArrayBuffer,
keys: ArrayBuffer,