Move CryptoDigest to WebCore/platform

Move CryptoDigest to WebCore/platform
https://bugs.webkit.org/show_bug.cgi?id=155008
<rdar://problem/24969787>

Reviewed by Brent Fulgham.

CryptoDigest provides a platform-independent interface for interacting with platform-
specific cryptographic hashing services. We currently make use of this code as part
of the implementation of Web Crypto. This code will also be beneficial as part of
implementing support for Content Security Policy inline script and inline stylesheet
hashes. We should move CryptoDigest to WebCore/platform to convey that it a general
purpose platform abstraction.

* CMakeLists.txt: Add include directory WebCore/platform/crypto.
* PlatformEfl.cmake: Add file platform/crypto/gnutls/CryptoDigestGnuTLS.cpp and
remove file crypto/gnutls/CryptoDigestGnuTLS.cpp.
* PlatformGTK.cmake: Ditto.
* PlatformMac.cmake: Add file platform/crypto/mac/CryptoDigestMac.cpp and
remove file crypto/mac/CryptoDigestMac.cpp.
* WebCore.xcodeproj/project.pbxproj:
* crypto/algorithms/CryptoAlgorithmSHA1.cpp:
(WebCore::CryptoAlgorithmSHA1::digest): Substitute "CryptoDigest::Algorithm" for "CryptoAlgorithmIdentifier".
* crypto/algorithms/CryptoAlgorithmSHA224.cpp:
(WebCore::CryptoAlgorithmSHA224::digest): Ditto.
* crypto/algorithms/CryptoAlgorithmSHA256.cpp:
(WebCore::CryptoAlgorithmSHA256::digest): Ditto.
* crypto/algorithms/CryptoAlgorithmSHA384.cpp:
(WebCore::CryptoAlgorithmSHA384::digest): Ditto.
* crypto/algorithms/CryptoAlgorithmSHA512.cpp:
(WebCore::CryptoAlgorithmSHA512::digest): Ditto.
* crypto/mac/CryptoAlgorithmRSASSA_PKCS1_v1_5Mac.cpp:
(WebCore::getCryptoDigestAlgorithm): Converts a CryptoAlgorithmIdentifier enumerator to a
CryptoDigest::Algorithm enumerator, if applicable.
(WebCore::CryptoAlgorithmRSASSA_PKCS1_v1_5::platformSign): Write in terms of WebCore::getCryptoDigestAlgorithm().
(WebCore::CryptoAlgorithmRSASSA_PKCS1_v1_5::platformVerify): Ditto.
* platform/crypto/CryptoDigest.h: Renamed from Source/WebCore/crypto/CryptoDigest.h. Also added enum CryptoDigest::Algorithm
and changed constructor to take this enum.
* platform/crypto/gnutls/CryptoDigestGnuTLS.cpp: Renamed from Source/WebCore/crypto/gnutls/CryptoDigestGnuTLS.cpp.
(WebCore::CryptoDigest::CryptoDigest): Substitute "CryptoDigest::Algorithm" for "CryptoAlgorithmIdentifier".
(WebCore::CryptoDigest::~CryptoDigest): Ditto.
(WebCore::CryptoDigest::create): Ditto.
(WebCore::CryptoDigest::addBytes): Ditto.
(WebCore::CryptoDigest::computeHash): Ditto.
* platform/crypto/mac/CryptoDigestMac.cpp: Renamed from Source/WebCore/crypto/mac/CryptoDigestMac.cpp.
(WebCore::toSHA1Context): Ditto.
(WebCore::toSHA224Context): Ditto.
(WebCore::toSHA256Context): Ditto.
(WebCore::toSHA384Context): Ditto.
(WebCore::toSHA512Context): Ditto.
(WebCore::CryptoDigest::CryptoDigest): Ditto.
(WebCore::CryptoDigest::~CryptoDigest): Ditto.
(WebCore::CryptoDigest::create): Ditto.
(WebCore::CryptoDigest::addBytes): Ditto.
(WebCore::CryptoDigest::computeHash): Ditto.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@197575 268f45cc-cd09-0410-ab3c-d52691b4dbfc