Level 3 OEMCrypto library

This CL contains the level 3 oemcrypto library built for android.  I
used the toolchain from the mnc-emu-release branch because I'm having
problems with the toolchain on master.

This includes the security patch API, and several bug fixes to the library.

Current versions:
mips/libwvlevel3.a  Level3 Library Dec 17 2015 21:26:57
arm/libwvlevel3.a  Level3 Library Dec 17 2015 21:09:47
x86/libwvlevel3.a  Level3 Library Dec 17 2015 21:19:15

http://go/wvgerrit/16371 Level 3 OEMCrypto library
http://go/wvgerrit/16315 Security Patch Level - haystack version
http://go/wvgerrit/16282 Correctly handle null pointer in GetKeyData
http://go/wvgerrit/16294 Initialize data for generation number
http://go/wvgerrit/16280 Correctly handle bad RSA key

bug: 26089773
bug: 26092100
bug: 26086944
Change-Id: I3ea1b5d219dae0c88deafa742f61d67e97297902

libwvdrmengine/level3/mips/level3_stubs.cpp

@@ -182,6 +182,10 @@ uint32_t Level3_APIVersion() {
   return OEMCrypto_ERROR_NOT_IMPLEMENTED;
 }
 
+uint8_t Level3_SecurityPatchLevel() {
+  return 0;
+}
+
 const char* Level3_SecurityLevel() {
   return "L3";
 }

libwvdrmengine/oemcrypto/include/level3.h

@@ -58,6 +58,7 @@ namespace wvoec3 {
 #define Level3_LoadTestKeybox           _lcc42
 #define Level3_ForceDeleteUsageEntry    _lcc43
 #define Level3_LoadTestRSAKey           _lcc45
+#define Level3_SecurityPatchLevel       _lcc46
 
 extern "C" {
 
@@ -171,6 +172,7 @@ OEMCryptoResult Level3_DeriveKeysFromSessionKey(OEMCrypto_SESSION session,
                                                 const uint8_t *enc_key_context,
                                                 size_t enc_key_context_length);
 uint32_t Level3_APIVersion();
+uint8_t Level3_SecurityPatchLevel();
 const char* Level3_SecurityLevel();
 OEMCryptoResult Level3_GetHDCPCapability(OEMCrypto_HDCP_Capability* current,
                                          OEMCrypto_HDCP_Capability* maximum);

libwvdrmengine/oemcrypto/test/oemcrypto_test.cpp

@@ -1604,6 +1604,15 @@ TEST_F(OEMCryptoKeyboxTest, NormalGetKeyData) {
   ASSERT_EQ(OEMCrypto_SUCCESS, sts);
 }
 
+// TODO(fredgc): warn people that this will be turned on.  It causes a
+// seg fault on some devices at the moment.
+TEST_F(OEMCryptoKeyboxTest, DISABLED_GetKeyDataNullPointer) {
+  OEMCryptoResult sts;
+  uint8_t key_data[256];
+  sts = OEMCrypto_GetKeyData(key_data, NULL);
+  ASSERT_NE(OEMCrypto_SUCCESS, sts);
+}
+
 TEST_F(OEMCryptoKeyboxTest, ProductionKeyboxValid) {
   ASSERT_EQ(OEMCrypto_SUCCESS, OEMCrypto_IsKeyboxValid());
 }