Initial import of Widevine Common Encryption DRM engine

Builds libwvmdrmengine.so, which is loaded by the new
MediaDrm APIs to support playback of Widevine/CENC
protected content.

Change-Id: I6f57dd37083dfd96c402cb9dd137c7d74edc8f1c

libwvdrmengine/level3/arm/l3crypto_key_mock.cpp

@@ -0,0 +1,97 @@
+/*******************************************************************************
+ *
+ * Copyright 2013 Google Inc. All Rights Reserved.
+ *
+ * mock implementation of OEMCrypto APIs
+ *
+ ******************************************************************************/
+
+#include <cstring>
+#include "l3crypto_key_mock.h"
+#include "wv_cdm_constants.h"
+
+namespace wvoec_obfs {
+
+bool KeyControlBlock::Validate() {
+
+  valid_ = false;
+  if (0x6b63746c != verification_) {
+    return false;
+  }
+  // TODO(gmorgan): validate control bits
+  valid_ = true;
+  return valid_;
+}
+
+uint32_t KeyControlBlock::ExtractField(const std::vector<uint8_t>& str, int idx) {
+  int bidx = idx * 4;
+  uint32_t t = static_cast<unsigned char>(str[bidx]) << 24;
+  t |= static_cast<unsigned char>(str[bidx+1]) << 16;
+  t |= static_cast<unsigned char>(str[bidx+2]) << 8;
+  t |= static_cast<unsigned char>(str[bidx+3]);
+  return t;
+}
+
+bool KeyControlBlock::SetFromString(const std::vector<uint8_t>& key_control_string) {
+  if (key_control_string.size() < wvcdm::KEY_CONTROL_SIZE) {
+    return false;
+  }
+
+  verification_ = ExtractField(key_control_string, 0);
+  duration_ = ExtractField(key_control_string, 1);
+  nonce_ = ExtractField(key_control_string, 2);
+  control_bits_ = ExtractField(key_control_string, 0);
+
+  return Validate();
+}
+
+Key::Key(KeyType ktype, const std::vector<uint8_t>& key_string,
+         const KeyControlBlock& control) :
+    valid_(true), type_(ktype),
+    value_(key_string), has_control_(true),
+    control_(control) {
+}
+
+bool Key::setValue(const char* key_string, size_t key_string_length) {
+  valid_ = false;
+  if (!key_string || key_string_length == 0) {
+    return false;
+  }
+
+  value_.assign(key_string, key_string + key_string_length);
+
+  if (isValidType() && has_control_) {
+    valid_ = true;
+  }
+  return valid_;
+}
+
+bool Key::setType(KeyType ktype) {
+  valid_ = false;
+  type_ = ktype;
+  if (value_.empty()) {
+    return false;
+  }
+
+  if (isValidType() && has_control_) {
+    valid_ = true;
+  }
+  return valid_;
+}
+
+bool Key::setControl(const KeyControlBlock& control) {
+  valid_ = false;
+  if (!control.valid()) {
+    return false;
+  }
+
+  control_ = control;
+  has_control_ = true;
+
+  if (isValidType() && !value_.empty()) {
+    valid_ = true;
+  }
+  return valid_;
+}
+
+}; // namespace wvoec_eng