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constTimeIsEqual

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This commit is contained in:
Isaac 2026-02-13 18:10:16 +04:00
parent 09d3f7386b
commit 466de70edd
1 changed files with 14 additions and 1 deletions
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15
submodules/TelegramCore/Sources/SecretChats/SecretChatEncryption.swift
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@ -119,6 +119,19 @@ private func messageKey(key: SecretChatKey, msgKey: UnsafeRawPointer, mode: Secr
}
}
private func constTimeIsEqual(data1: Data, data2: Data) -> Bool {
if data1.count != data2.count {
return false
}
var isEqual = true
for i in 0 ..< data1.count {
if data1[i] != data2[i] {
isEqual = false
}
}
return isEqual
}
func withDecryptedMessageContents(parameters: SecretChatEncryptionParameters, data: MemoryBuffer) -> MemoryBuffer? {
assert(parameters.key.key.length == 256)
@ -211,7 +224,7 @@ func withDecryptedMessageContents(parameters: SecretChatEncryptionParameters, da
if Int(payloadLength) <= 0 || Int(payloadLength) > decryptedData.count - 4 || paddingLength < 12 || paddingLength > 1024 {
if localMessageKey != msgKeyData {
if !constTimeIsEqual(data1: localMessageKey, data2: msgKeyData) {
Logger.shared.log("SecretChatEncryption", "message key doesn't match (length check)")
}