Implement crypto signature verification routines using OpenSSL.

extensions/browser/api/cast_channel/cast_auth_util.h

Index: extensions/browser/api/cast_channel/cast_auth_util.h
diff --git a/extensions/browser/api/cast_channel/cast_auth_util.h b/extensions/browser/api/cast_channel/cast_auth_util.h
index fa00d8173e297fcca78d0466e65c75735506241e..fd26eb5cf1e18d895a621fdffdf82b156da77042 100644
--- a/extensions/browser/api/cast_channel/cast_auth_util.h
+++ b/extensions/browser/api/cast_channel/cast_auth_util.h
@@ -11,6 +11,7 @@ namespace extensions {
 namespace core_api {
 namespace cast_channel {
 
+class AuthResponse;
 class CastMessage;
 class DeviceAuthMessage;
 
@@ -25,10 +26,11 @@ struct AuthResult {
     ERROR_MESSAGE_ERROR,
     ERROR_NO_RESPONSE,
     ERROR_FINGERPRINT_NOT_FOUND,
-    ERROR_NSS_CERT_PARSING_FAILED,
-    ERROR_NSS_CERT_NOT_SIGNED_BY_TRUSTED_CA,
-    ERROR_NSS_CANNOT_EXTRACT_PUBLIC_KEY,
-    ERROR_NSS_SIGNED_BLOBS_MISMATCH
+    ERROR_CERT_PARSING_FAILED,
+    ERROR_CERT_NOT_SIGNED_BY_TRUSTED_CA,
+    ERROR_CANNOT_EXTRACT_PUBLIC_KEY,
+    ERROR_SIGNED_BLOBS_MISMATCH,
+    ERROR_UNEXPECTED_AUTH_LIBRARY_RESULT,

[mark a. foltz, 2014/11/03 19:06:27]

Omit trailing comma

[Kevin M, 2014/11/03 19:41:55]

Done.

   };
 
   // Constructs a AuthResult that corresponds to success.
@@ -56,13 +58,15 @@ struct AuthResult {
 // Authenticates the given |challenge_reply|:
 // 1. Signature contained in the reply is valid.
 // 2. Certficate used to sign is rooted to a trusted CA.
-AuthResult AuthenticateChallengeReply(const CastMessage& challenge_reply,
-                                      const std::string& peer_cert);
+AuthResult AuthenticateChallengeReply(
+    const CastMessage& challenge_reply,
+    const std::string& peer_cert);

[davidben, 2014/11/03 19:01:50]

Nit: Why reformat this one?

[Kevin M, 2014/11/03 19:41:55]

I think I renamed it to something else previously and reformatted around that -
switched back to the previous format.

 
-// Parses a DeviceAuthMessage payload from a challenge reply.
-// Returns an AuthResult to indicate success or failure.
-AuthResult ParseAuthMessage(const CastMessage& challenge_reply,
-                            DeviceAuthMessage* auth_message);
+// Auth-library specific implementation of cryptographic signature
+// verification routines. Verifies that |response| contains a
+// valid signed form of |peer_cert|.
+AuthResult VerifyCredentials(const AuthResponse& response,
+                             const std::string& peer_cert);
 
 }  // namespace cast_channel
 }  // namespace core_api