[webcrypto] Remove support for AES 192-bit keys (2 of 2)

content/child/webcrypto/shared_crypto.cc

Index: content/child/webcrypto/shared_crypto.cc
diff --git a/content/child/webcrypto/shared_crypto.cc b/content/child/webcrypto/shared_crypto.cc
index b4d5931327a31de64f6ec3a9dd5ab5fa2d96823b..6b3d45010b0979259e9cfc0d495d7e923c9391f8 100644
--- a/content/child/webcrypto/shared_crypto.cc
+++ b/content/child/webcrypto/shared_crypto.cc
@@ -219,6 +219,10 @@ Status ImportKeyRaw(const CryptoData& key_data,
     case blink::WebCryptoAlgorithmIdAesKw:
       if (!IsValidAesKeyLengthBytes(key_data.byte_length()))
         return Status::ErrorImportAesKeyLength();
+      if (key_data.byte_length() == 24 &&
+          algorithm.id() == blink::WebCryptoAlgorithmIdAesGcm) {
+        return Status::ErrorAesGcm192Unsupported();

[Ryan Sleevi, 2014/06/10 23:44:21]

Same comments re All AES

+      }
     // Fallthrough intentional!
     case blink::WebCryptoAlgorithmIdHmac:
       return platform::ImportKeyRaw(
@@ -662,6 +666,12 @@ Status GenerateSecretKey(const blink::WebCryptoAlgorithm& algorithm,
       if (!IsValidAesKeyLengthBits(algorithm.aesKeyGenParams()->lengthBits()))
         return Status::ErrorGenerateKeyLength();
       keylen_bytes = algorithm.aesKeyGenParams()->lengthBits() / 8;
+
+      if (keylen_bytes == 24 &&
+          algorithm.id() == blink::WebCryptoAlgorithmIdAesGcm) {
+        return Status::ErrorAesGcm192Unsupported();
+      }

[Ryan Sleevi, 2014/06/10 23:44:21]

Same comments re All AES

+
       break;
     }
     case blink::WebCryptoAlgorithmIdHmac: {