https://bugs.webkit.org/show_bug.cgi?id=124475

Reviewed by Sam Weinig.

Source/WebCore: 

Test: crypto/subtle/rsa-export-key.html

* bindings/js/JSCryptoKeySerializationJWK.h:
* bindings/js/JSCryptoKeySerializationJWK.cpp:
(WebCore::JSCryptoKeySerializationJWK::buildJSONForRSAComponents):
(WebCore::JSCryptoKeySerializationJWK::addJWKAlgorithmToJSON):
(WebCore::JSCryptoKeySerializationJWK::serialize):
Added said support (this part works with private keys too).

* crypto/keys/CryptoKeyRSA.h:
* crypto/mac/CryptoKeyRSAMac.cpp:
(WebCore::CryptoKeyRSA::getPublicKeyComponents): Moved the logic for getting a
public key from private one here for reuse in keySizeInBits().
(WebCore::CryptoKeyRSA::isRestrictedToHash):
(WebCore::CryptoKeyRSA::keySizeInBits):
(WebCore::CryptoKeyRSA::exportData):
Exposed information necessary for JWK serialization.

LayoutTests: 

* crypto/subtle/rsa-export-key-expected.txt: Added.
* crypto/subtle/rsa-export-key.html: Added.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@159403 268f45cc-cd09-0410-ab3c-d52691b4dbfc