Entitlement rotation support

Updates also include:
- Add APIs to query current Simulcrypt channel & stream status;
- EMM format change (used only to carry fingerprinting and service
blocking info);
- Key fetcher example to use curl key fetcher.

example/BUILD

@@ -62,6 +62,7 @@ cc_binary(
     srcs = ["wv_cas_key_fetcher_example.cc"],
     deps = [
         "//common:status",
+        "//media_cas_packager_sdk/public:wv_cas_curl_key_fetcher",
         "//media_cas_packager_sdk/public:wv_cas_key_fetcher",
     ],
 )

example/test_emmg_messages.h

@@ -151,11 +151,11 @@ const char kTestEmmgPrivateDataProvision[] = {
     '\x47', '\x40', '\x00', '\x10', '\x0a', '\x0d', '\x77', '\x69', '\x64',
     '\x65', '\x76', '\x69', '\x6e', '\x65', '\x5f', '\x74', '\x65', '\x73',
     '\x74', '\x12', '\x09', '\x43', '\x61', '\x73', '\x54', '\x73', '\x46',
-    '\x61', '\x6b', '\x65', '\x1a', '\x10', '\x66', '\x61', '\x6b', '\x65',
-    '\x4b', '\x65', '\x79', '\x49', '\x64', '\x31', '\x4b', '\x65', '\x79',
-    '\x49', '\x64', '\x31', '\x1a', '\x10', '\x66', '\x61', '\x6b', '\x65',
-    '\x4b', '\x65', '\x79', '\x49', '\x64', '\x32', '\x4b', '\x65', '\x79',
-    '\x49', '\x64', '\x32', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00',
+    '\x61', '\x6b', '\x65', '\x22', '\x0a', '\x66', '\x61', '\x6b', '\x65',
+    '\x47', '\x72', '\x6f', '\x75', '\x70', '\x31', '\x22', '\x0c', '\x66',
+    '\x61', '\x6b', '\x65', '\x47', '\x72', '\x6f', '\x75', '\x70', '\x49',
+    '\x64', '\x32', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00',
+    '\x00', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00',
     '\x00', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00',
     '\x00', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00',
     '\x00', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00',
@@ -191,22 +191,22 @@ const char kTestEmmgEmmDataProvision[] = {
     // Start of the first TS packet (188 bytes).
     '\x47', '\x40', '\x00', '\x10',  // TS packet header (4 bytes).
     '\x00',                          // Pointer field (1 byte).
-    '\x82', '\x70', '\xbe',          // Secyion header (3 bytes).
+    '\x82', '\x70', '\xbc',          // Section header (3 bytes).
     // Start of Widevine EMM.
-    '\x01', '\x08', '\x00', '\x00', '\x00', '\x00', '\x5f', '\x3d', '\xc1',
-    '\xfb', '\x00', '\x6b', '\x0a', '\x14', '\x0a', '\x03', '\x43', '\x48',
-    '\x31', '\x0a', '\x03', '\x43', '\x48', '\x32', '\x12', '\x08', '\x63',
-    '\x6f', '\x6e', '\x74', '\x72', '\x6f', '\x6c', '\x73', '\x0a', '\x16',
-    '\x0a', '\x03', '\x43', '\x48', '\x33', '\x12', '\x0f', '\x61', '\x6e',
-    '\x6f', '\x74', '\x68', '\x65', '\x72', '\x20', '\x63', '\x6f', '\x6e',
-    '\x74', '\x72', '\x6f', '\x6c', '\x12', '\x18', '\x0a', '\x03', '\x43',
-    '\x48', '\x31', '\x0a', '\x03', '\x43', '\x48', '\x32', '\x12', '\x06',
-    '\x47', '\x72', '\x6f', '\x75', '\x70', '\x31', '\x20', '\xd2', '\x85',
-    '\xd8', '\xcc', '\x04', '\x12', '\x21', '\x0a', '\x03', '\x43', '\x48',
-    '\x33', '\x12', '\x06', '\x47', '\x72', '\x6f', '\x75', '\x70', '\x32',
-    '\x12', '\x06', '\x47', '\x72', '\x6f', '\x75', '\x70', '\x33', '\x18',
-    '\xd2', '\x85', '\xd8', '\xcc', '\x04', '\x20', '\xd3', '\x85', '\xd8',
-    '\xcc', '\x04', '\x78', '\x78', '\x78', '\x78', '\x78', '\x78', '\x78',
+    '\x0a', '\x71', '\x0a', '\x14', '\x0a', '\x03', '\x43', '\x48', '\x31',
+    '\x0a', '\x03', '\x43', '\x48', '\x32', '\x12', '\x08', '\x63', '\x6f',
+    '\x6e', '\x74', '\x72', '\x6f', '\x6c', '\x73', '\x0a', '\x16', '\x0a',
+    '\x03', '\x43', '\x48', '\x33', '\x12', '\x0f', '\x61', '\x6e', '\x6f',
+    '\x74', '\x68', '\x65', '\x72', '\x20', '\x63', '\x6f', '\x6e', '\x74',
+    '\x72', '\x6f', '\x6c', '\x12', '\x18', '\x0a', '\x03', '\x43', '\x48',
+    '\x31', '\x0a', '\x03', '\x43', '\x48', '\x32', '\x12', '\x06', '\x47',
+    '\x72', '\x6f', '\x75', '\x70', '\x31', '\x20', '\xd2', '\x85', '\xd8',
+    '\xcc', '\x04', '\x12', '\x21', '\x0a', '\x03', '\x43', '\x48', '\x33',
+    '\x12', '\x06', '\x47', '\x72', '\x6f', '\x75', '\x70', '\x32', '\x12',
+    '\x06', '\x47', '\x72', '\x6f', '\x75', '\x70', '\x33', '\x18', '\xd2',
+    '\x85', '\xd8', '\xcc', '\x04', '\x20', '\xd3', '\x85', '\xd8', '\xcc',
+    '\x04', '\x18', '\xfb', '\x83', '\xf7', '\xf9', '\x05', '\x12', '\x47',
+    '\x78', '\x78', '\x78', '\x78', '\x78', '\x78', '\x78', '\x78', '\x78',
     '\x78', '\x78', '\x78', '\x78', '\x78', '\x78', '\x78', '\x78', '\x78',
     '\x78', '\x78', '\x78', '\x78', '\x78', '\x78', '\x78', '\x78', '\x78',
     '\x78', '\x78', '\x78', '\x78', '\x78', '\x78', '\x78', '\x78', '\x78',
@@ -216,8 +216,8 @@ const char kTestEmmgEmmDataProvision[] = {
     // Start of the second TS packet (188 bytes).
     '\x47', '\x00', '\x00', '\x11',  // TS packet header (4 bytes).
     // Continued Widevine EMM.
-    '\x78', '\x78', '\x78', '\x78', '\x78', '\x78', '\x78', '\x78', '\x78',
-    '\x78', '\xff', '\xff', '\xff', '\xff', '\xff', '\xff', '\xff', '\xff',
+    '\x78', '\x78', '\x78', '\x78', '\x78', '\x78', '\x78', '\x78', '\xff',
+    '\xff', '\xff', '\xff', '\xff', '\xff', '\xff', '\xff', '\xff', '\xff',
     '\xff', '\xff', '\xff', '\xff', '\xff', '\xff', '\xff', '\xff', '\xff',
     '\xff', '\xff', '\xff', '\xff', '\xff', '\xff', '\xff', '\xff', '\xff',
     '\xff', '\xff', '\xff', '\xff', '\xff', '\xff', '\xff', '\xff', '\xff',

example/wv_cas_key_fetcher_example.cc

@@ -12,8 +12,11 @@
 #include <vector>
 
 #include "common/status.h"
+#include "media_cas_packager_sdk/public/wv_cas_curl_key_fetcher.h"
 #include "media_cas_packager_sdk/public/wv_cas_key_fetcher.h"
 
+const char kCasEncryptionServerUrl[] =
+    "https://license.uat.widevine.com/cas/getcontentkey/widevine_test";
 const char kContentId[] = "21140844";
 const char kContentProvider[] = "widevine";
 const char kTrackType[] = "SD";
@@ -22,36 +25,16 @@ const char kSigningProvider[] = "widevine_test";
 const char kSingingKey[] =
     "1ae8ccd0e7985cc0b6203a55855a1034afc252980e970ca90e5202689f947ab9";
 const char kSingingIv[] = "d58ce954203b7c9a9a9d467f59839249";
-const char kHttpResponse[] =
-    "{\"response\":"
-    "\"eyJzdGF0dXMiOiJPSyIsImNvbnRlbnRfaWQiOiJNakV4TkRBNE5EUT0iLCJlbnRpdGxlbWVu"
-    "dF9rZXlzIjpbeyJrZXlfaWQiOiJNUGFndXhNb1hNNkUxUzhEOUF3RkNBPT0iLCJrZXkiOiJoZ1"
-    "JycmdqeUg4NjQycjY3VHd0OHJ1cU5MUGNMRmtKcWRVSUROdm5GZDBNPSIsInRyYWNrX3R5cGUi"
-    "OiJTRCIsImtleV9zbG90IjoiU0lOR0xFIn1dfQ==\"}";
 
 using widevine::Status;
 using widevine::cas::EntitlementKeyInfo;
 using widevine::cas::EntitlementRequestParams;
-using widevine::cas::WvCasKeyFetcher;
-
-class ExampleKeyFetcher : public WvCasKeyFetcher {
- public:
-  ExampleKeyFetcher(const std::string& signing_provider,
-                    const std::string& signing_key,
-                    const std::string& signing_iv)
-      : WvCasKeyFetcher(signing_provider, signing_key, signing_iv) {}
-
-  // An example that always returns the same response.
-  Status MakeHttpRequest(const std::string& signed_request_json,
-                         std::string* http_response_json) const override {
-    *http_response_json = kHttpResponse;
-    return widevine::OkStatus();
-  }
-};
+using widevine::cas::WvCasCurlKeyFetcher;
 
 int main(int argc, char** argv) {
-  // Initialize key fetcher.
-  ExampleKeyFetcher key_fetcher(kSigningProvider, kSingingKey, kSingingIv);
+  // Initialize key fetcher with server url.
+  WvCasCurlKeyFetcher key_fetcher(kCasEncryptionServerUrl, kSigningProvider,
+                                  kSingingKey, kSingingIv);
 
   // Create request string.
   std::string request_str;