Merge "Clean up CdmEngine logs." into sc-dev am: bee62d797e

Original change: https://googleplex-android-review.googlesource.com/c/platform/vendor/widevine/+/14137667

Change-Id: Ib4c932dfacb63d62590e43db80b818bd63fcec31

libwvdrmengine/cdm/Android.bp

@@ -61,6 +61,7 @@ cc_library_static {
         CORE_SRC_DIR + "/privacy_crypto_boringssl.cpp",
         CORE_SRC_DIR + "/service_certificate.cpp",
         CORE_SRC_DIR + "/usage_table_header.cpp",
+        CORE_SRC_DIR + "/wv_cdm_types.cpp",
         SRC_DIR + "/wv_content_decryption_module.cpp",
         METRICS_SRC_DIR + "/attribute_handler.cpp",
         METRICS_SRC_DIR + "/counter_metric.cpp",

libwvdrmengine/cdm/core/include/crypto_session.h

@@ -25,6 +25,7 @@
 namespace wvcdm {
 
 class CryptoKey;
+class CryptoSessionFactory;
 class UsageTableHeader;
 
 using CryptoKeyMap = std::map<std::string, CryptoKey*>;
@@ -40,8 +41,6 @@ OEMCrypto_Substring GetSubstring(const std::string& message = "",
                                  bool set_zero = false);
 OEMCryptoCipherMode ToOEMCryptoCipherMode(CdmCipherMode cipher_mode);
 
-class CryptoSessionFactory;
-
 class CryptoSession {
  public:
   using HdcpCapability = OEMCrypto_HDCP_Capability;

libwvdrmengine/cdm/core/include/license.h

@@ -21,7 +21,6 @@ class VersionInfo;
 }  // namespace video_widevine
 
 namespace wvcdm {
-
 class Clock;
 class CryptoSession;
 class PolicyEngine;
@@ -186,7 +185,6 @@ class CdmLicense {
 
   CORE_DISALLOW_COPY_AND_ASSIGN(CdmLicense);
 };
-
 }  // namespace wvcdm
 
 #endif  // WVCDM_CORE_LICENSE_H_

libwvdrmengine/cdm/core/include/wv_cdm_types.h

@@ -793,6 +793,22 @@ class KeyMessage;
 class Request;
 class Key;
 
+// Logging utilities for types defined above.
+// Converts the different enum types to a human readable C-string for
+// logging.  Query strings values are used if available for the enum.
+// These functions will fail silently to avoid double logging.
+const char* CdmCertificateTypeToString(CdmCertificateType type);
+const char* CdmLicenseTypeToString(CdmLicenseType license_type);
+const char* CdmSecurityLevelToString(CdmSecurityLevel security_level);
+const char* SecurityLevelToString(SecurityLevel security_level);
+// Both IdToString() and IdPtrToString() functions are used to convert
+// session IDs, key set IDs or other CDM specific identifiers to a
+// loggable format.
+const char* IdToString(const std::string& id);
+// Some CDM API function allow for optional string parameters to be
+// provided as string pointers.
+const char* IdPtrToString(const std::string* id);
+
 }  // namespace wvcdm
 
 #endif  // WVCDM_CORE_WV_CDM_TYPES_H_

libwvdrmengine/cdm/core/src/certificate_provisioning.cpp

@@ -15,8 +15,8 @@
 #include "string_conversions.h"
 #include "wv_cdm_constants.h"
 
+namespace wvcdm {
 namespace {
-
 const std::string kEmptyString;
 
 // URL for Google Provisioning Server.
@@ -104,10 +104,7 @@ bool ExtractAndDecodeSignedMessage(const std::string& provisioning_response,
   result->assign(decoded_message.begin(), decoded_message.end());
   return true;
 }
-
 }  // namespace
-
-namespace wvcdm {
 // Protobuf generated classes.
 using video_widevine::ClientIdentification_ClientCapabilities;
 using video_widevine::ClientIdentification_NameValue;

libwvdrmengine/cdm/core/src/crypto_session.cpp

@@ -164,11 +164,6 @@ size_t GenericEncryptionBlockSize(CdmEncryptionAlgorithm algorithm) {
   }
   return kAes128BlockSize;
 }
-
-const char* SecurityLevelToString(SecurityLevel security_level) {
-  return security_level == kLevel3 ? QUERY_VALUE_SECURITY_LEVEL_L3.c_str()
-                                   : QUERY_VALUE_SECURITY_LEVEL_DEFAULT.c_str();
-}
 }  // namespace
 
 shared_mutex CryptoSession::static_field_mutex_;

libwvdrmengine/cdm/core/src/wv_cdm_types.cpp

@@ -0,0 +1,76 @@
+// Copyright 2021 Google LLC. All Rights Reserved. This file and proprietary
+// source code may only be used and distributed under the Widevine License
+// Agreement.
+#include "wv_cdm_types.h"
+
+#include "wv_cdm_constants.h"
+
+namespace wvcdm {
+namespace {
+const char kEmptyIdRep[] = "<empty>";
+const char kNullIdRep[] = "<null>";
+const char kUnknownValueRep[] = "<unknown>";
+}  // namespace
+
+const char* CdmCertificateTypeToString(CdmCertificateType type) {
+  switch (type) {
+    case kCertificateWidevine:
+      return "Widevine";
+    case kCertificateX509:
+      return "x509";
+  }
+  return kUnknownValueRep;
+}
+
+const char* CdmLicenseTypeToString(CdmLicenseType license_type) {
+  switch (license_type) {
+    case kLicenseTypeOffline:
+      return "Offline";
+    case kLicenseTypeStreaming:
+      return "Streaming";
+    case kLicenseTypeRelease:
+      return "Release";
+    case kLicenseTypeTemporary:
+      return "Temporary";
+    case kLicenseTypeEmbeddedKeyData:
+      return "EmbeddedKeyData";
+  }
+  return kUnknownValueRep;
+}
+
+const char* CdmSecurityLevelToString(CdmSecurityLevel security_level) {
+  switch (security_level) {
+    case kSecurityLevelUninitialized:
+      return "Uninitialized";
+    case kSecurityLevelL1:
+      return QUERY_VALUE_SECURITY_LEVEL_L1.c_str();
+    case kSecurityLevelL2:
+      return QUERY_VALUE_SECURITY_LEVEL_L2.c_str();
+    case kSecurityLevelL3:
+      return QUERY_VALUE_SECURITY_LEVEL_L3.c_str();
+    case kSecurityLevelUnknown:
+      break;
+  }
+  return QUERY_VALUE_SECURITY_LEVEL_UNKNOWN.c_str();
+}
+
+const char* SecurityLevelToString(SecurityLevel security_level) {
+  switch (security_level) {
+    case kLevelDefault:
+      return QUERY_VALUE_SECURITY_LEVEL_DEFAULT.c_str();
+    case kLevel3:
+      return QUERY_VALUE_SECURITY_LEVEL_L3.c_str();
+  }
+  return kUnknownValueRep;
+}
+
+const char* IdToString(const std::string& id) {
+  return id.empty() ? kEmptyIdRep : id.c_str();
+}
+
+const char* IdPtrToString(const std::string* id) {
+  if (id == nullptr) return kNullIdRep;
+  return id->empty() ? kEmptyIdRep : id->c_str();
+}
+
+}  // namespace wvcdm