diff --git a/libwvdrmengine/cdm/core/src/initialization_data.cpp b/libwvdrmengine/cdm/core/src/initialization_data.cpp
index 8e11afb6..f1c8ba4f 100644
--- a/libwvdrmengine/cdm/core/src/initialization_data.cpp
+++ b/libwvdrmengine/cdm/core/src/initialization_data.cpp
@@ -683,7 +683,7 @@ void InitializationData::DumpToLogs() const {
   if (!is_supported()) {
     LOGD("InitData: Not supported");
   }
-  if (!IsEmpty()) {
+  if (IsEmpty()) {
     LOGD("InitData: Empty");
   }
   std::string type_info = type();
@@ -738,6 +738,9 @@ void InitializationData::DumpToLogs() const {
     LOGD("InitData: entitlement_key_id %d: %s -> %s", i,
          wvutil::b2a_hex(key.entitlement_key_id()).c_str(),
          wvutil::b2a_hex(key.key_id()).c_str());
+    LOGD("InitData:    entitled_key %d: %s", i,
+         wvutil::b2a_hex(key.key()).c_str());
+    LOGD("InitData:    iv %d: %s", i, wvutil::b2a_hex(key.iv()).c_str());
   }
 }
 
diff --git a/libwvdrmengine/cdm/core/test/test_base.cpp b/libwvdrmengine/cdm/core/test/test_base.cpp
index 1c478342..e154e0f6 100644
--- a/libwvdrmengine/cdm/core/test/test_base.cpp
+++ b/libwvdrmengine/cdm/core/test/test_base.cpp
@@ -144,6 +144,17 @@ void show_menu(const char* prog_name, const std::string& extra_help_text) {
 
   std::cout << extra_help_text << std::endl;
 }
+
+// Increment counter for AES-CTR.  The CENC spec specifies we increment only
+// the low 64 bits of the IV counter, and leave the high 64 bits alone.  This
+// is different from the BoringSSL implementation, so we implement the CTR loop
+// ourselves.
+void ctr128_inc64(int64_t increaseBy, std::vector<uint8_t>& iv) {
+  uint64_t* counterBuffer = reinterpret_cast<uint64_t*>(&(iv[8]));
+  (*counterBuffer) =
+      wvutil::htonll64(wvutil::ntohll64(*counterBuffer) + increaseBy);
+}
+
 }  // namespace
 
 std::unique_ptr<ConfigTestEnv> WvCdmTestBase::default_config_;
@@ -157,6 +168,26 @@ void WvCdmTestBase::StripeBuffer(std::vector<uint8_t>* buffer, size_t size,
   }
 }
 
+// Encrypt a block of data using CTR mode.
+std::vector<uint8_t> WvCdmTestBase::Aes128CtrEncrypt(
+    const std::vector<uint8_t>& key, const std::vector<uint8_t>& starting_iv,
+    const std::vector<uint8_t>& in_buffer) {
+  AES_KEY aes_key;
+  AES_set_encrypt_key(key.data(), AES_BLOCK_SIZE * 8, &aes_key);
+  std::vector<uint8_t> out_buffer(in_buffer.size());
+  std::vector<uint8_t> iv = starting_iv;
+  size_t l = 0;  // byte index into encrypted subsample.
+  while (l < in_buffer.size()) {
+    uint8_t aes_output[AES_BLOCK_SIZE];
+    AES_encrypt(iv.data(), aes_output, &aes_key);
+    for (size_t n = 0; n < AES_BLOCK_SIZE && l < in_buffer.size(); n++, l++) {
+      out_buffer[l] = aes_output[n] ^ in_buffer[l];
+    }
+    ctr128_inc64(1, iv);
+  }
+  return out_buffer;
+}
+
 std::string WvCdmTestBase::Aes128CbcEncrypt(std::vector<uint8_t> key,
                                             const std::vector<uint8_t>& clear,
                                             const std::vector<uint8_t> iv) {
diff --git a/libwvdrmengine/cdm/core/test/test_base.h b/libwvdrmengine/cdm/core/test/test_base.h
index c8d48776..4f573917 100644
--- a/libwvdrmengine/cdm/core/test/test_base.h
+++ b/libwvdrmengine/cdm/core/test/test_base.h
@@ -62,6 +62,10 @@ class WvCdmTestBase : public ::testing::Test {
                                       const std::vector<uint8_t>& clear,
                                       const std::vector<uint8_t> iv);
   // Helper method for doing cryptography.
+  static std::vector<uint8_t> Aes128CtrEncrypt(
+      const std::vector<uint8_t>& key, const std::vector<uint8_t>& starting_iv,
+      const std::vector<uint8_t>& in_buffer);
+  // Helper method for doing cryptography.
   static std::string SignHMAC(const std::string& message,
                               const std::vector<uint8_t>& key);