Merge commit '7621e2f8dec938cf48181c8b10afc9b01f444e68' into beta

submodules/TelegramCore/Sources/TelegramEngine/SecureId/SecureIdValueAccessContext.swift

@@ -0,0 +1,34 @@
+import Foundation
+
+public struct SecureIdValueAccessContext: Equatable {
+    let secret: Data
+    let id: Int64
+    
+    public static func ==(lhs: SecureIdValueAccessContext, rhs: SecureIdValueAccessContext) -> Bool {
+        if lhs.secret != rhs.secret {
+            return false
+        }
+        if lhs.id != rhs.id {
+            return false
+        }
+        return true
+    }
+}
+
+public func generateSecureIdValueEmptyAccessContext() -> SecureIdValueAccessContext? {
+    return SecureIdValueAccessContext(secret: Data(), id: 0)
+}
+
+public func generateSecureIdValueAccessContext() -> SecureIdValueAccessContext? {
+    guard let secret = generateSecureSecretData() else {
+        return nil
+    }
+    let secretHashData = sha512Digest(secret)
+    var secretHash: Int64 = 0
+    secretHashData.withUnsafeBytes { rawBytes -> Void in
+        let bytes = rawBytes.baseAddress!.assumingMemoryBound(to: Int8.self)
+
+        memcpy(&secretHash, bytes.advanced(by: secretHashData.count - 8), 8)
+    }
+    return SecureIdValueAccessContext(secret: secret, id: secretHash)
+}