IOS-8883: Improve logging (#390)

Author: Andrey Fedorov

Diff for: TangemSdk/TangemSdk/Common/APDU/ResponseApdu.swift

@@ -68,6 +68,6 @@ public struct ResponseApdu {
 
 extension ResponseApdu: CustomStringConvertible {
     public var description: String {
-        return "<-- RECEIVED [\(data.count + 2) bytes]: \(data) \(sw1) \(sw2) (SW: \(statusWord))"
+        return "<-- RECEIVED [\(data.count + 2) bytes]: *** \(sw1) \(sw2) (SW: \(statusWord))"
     }
 }

Diff for: TangemSdk/TangemSdk/Common/Core/CardSession.swift

@@ -292,9 +292,7 @@ public class CardSession {
             completion(.failure(.sessionInactive))
             return
         }
-        
-        Log.apdu("Not encrypted apdu: \(apdu)")
-        
+
         reader.tag
             .filter { $0 != .none }
             .filter {[weak self] tag in

Diff for: TangemSdk/TangemSdk/Common/Log/TlvLogging.swift

@@ -14,6 +14,11 @@ protocol TlvLogging {
 
 extension TlvLogging {
     func logTlv<T>(_ tlv: Tlv, _ value: T) {
+        guard !tlv.tag.shouldMask else {
+            logMasked(tlv)
+            return
+        }
+
         var tlvString = "\(tlv)"
 
         if tlv.tag.valueType != .data && tlv.tag.valueType != .hexString {
@@ -22,4 +27,11 @@ extension TlvLogging {
 
         Log.tlv(tlvString)
     }
+
+    private func logMasked(_ tlv: Tlv) {
+        let tagName = "\(tlv.tag)".capitalizingFirst()
+        let tagFullName = "TAG_\(tagName)"
+
+        Log.tlv("\(tagFullName) [0x\(tlv.tagRaw):***]: ***")
+    }
 }

Diff for: TangemSdk/TangemSdk/Common/NFC/NFCReader.swift

@@ -321,7 +321,7 @@ extension NFCReader: CardReader {
                 } //todo: handle tag lost
 
                 let requestTS = Date()
-                Log.apdu("SEND --> \(apdu)")
+
                 return iso7816tag
                     .sendCommandPublisher(cApdu: apdu)
                     .combineLatest(self.cancellationPublisher)

Diff for: TangemSdk/TangemSdk/Common/TLV/TlvTag.swift

@@ -192,4 +192,120 @@ public enum TlvTag: Byte {
             return .data
         }
     }
+
+    var shouldMask: Bool {
+        switch self {
+        case .pin,
+                .pin2,
+                .newPin,
+                .newPin2,
+                .newPin3,
+                .walletPublicKey,
+                .walletPrivateKey:
+            return true
+        case .unknown,
+                .cardId,
+                .transactionOutHash,
+                .transactionOutHashSize,
+                .walletSignature,
+                .walletRemainingSignatures,
+                .walletSignedHashes,
+                .pause,
+                .flash,
+                .issuerTxSignature,
+                .status,
+                .cardPublicKey,
+                .cardSignature,
+                .curveId,
+                .hashAlgId,
+                .signingMethod,
+                .maxSignatures,
+                .pauseBeforePin2,
+                .settingsMask,
+                .userSettingsMask,
+                .cardData,
+                .ndefData,
+                .createWalletAtPersonalize,
+                .health,
+                .crExKey,
+                .publicKeyChallenge,
+                .publicKeySalt,
+                .challenge,
+                .salt,
+                .validationCounter,
+                .cvc,
+                .sessionKeyA,
+                .sessionKeyB,
+                .uid,
+                .manufacturerName,
+                .manufacturerSignature,
+                .issuerPublicKey,
+                .issuerTransactionPublicKey,
+                .issuerData,
+                .issuerDataSignature,
+                .issuerDataCounter,
+                .isActivated,
+                .activationSeed,
+                .paymentFlowVersion,
+                .userData,
+                .userProtectedData,
+                .userCounter,
+                .userProtectedCounter,
+                .resetPin,
+                .codePageAddress,
+                .codePageCount,
+                .codeHash,
+                .trOutRaw,
+                .firmwareVersion,
+                .batchId,
+                .manufactureDateTime,
+                .issuerName,
+                .blockchainName,
+                .manufacturerPublicKey,
+                .cardIDManufacturerSignature,
+                .tokenSymbol,
+                .tokenContractAddress,
+                .tokenDecimal,
+                .tokenName,
+                .denomination,
+                .validatedBalance,
+                .lastSignDate,
+                .denominationText,
+                .checkWalletCounter,
+                .productMask,
+                .isLinked,
+                .terminalPublicKey,
+                .terminalTransactionSignature,
+                .legacyMode,
+                .interactionMode,
+                .offset,
+                .size,
+                .acquirerPublicKey,
+                .pin2IsDefault,
+                .pinIsDefault,
+                .walletIndex,
+                .walletsCount,
+                .walletData,
+                .cardWallet,
+                .fileIndex,
+                .fileSettings,
+                .fileTypeName,
+                .fileData,
+                .fileSignature,
+                .fileCounter,
+                .fileOwnerIndex,
+                .walletHDPath,
+                .walletHDChain,
+                .certificate,
+                .backupStatus,
+                .backupCount,
+                .primaryCardLinkingKey,
+                .backupCardLinkingKey,
+                .backupCardLink,
+                .backupAttestSignature,
+                .backupCardPublicKey,
+                .proof:
+            return false
+        }
+    }
 }