On Apr 20, 2010, at 3:32 AM, Fumitoshi Ukai (鵜飼文敏) wrote:
I'm implementing new protocol of WebSocket ( http://www.whatwg.org/specs/web-socket-protocol/
).
Since it now requires MD5 in handshake, I wonder how I could add MD5
in WebCore. For now, there is no MD5 in WebCore. It is in
WebKitTools/DumpRenderTree to get message digest of image file.
I'm thinking to add new header file as WebCore/platform/MD5.h, which
provides the following functions.
struct MD5_CTX;
void MD5_Init(MD5_CTX*);
void MD5_Update(MD5_CTX*, unsigned char* input, unsigned length);
void MD5_Final(unsigned char hash[16], MD5_CTX*);
In Windows platform, it is implemented using "Cryptdll.dll". Is it
ok to copy WebKitTools/DumpRenderTree/win/MD5.cpp to WebCore/
platform/win/MD5.cpp, or move?
In Mac platform, it is provided by <CommonCrypto/CommonDigest.h>
with #define COMMON_DIGEST_FOR_OPENSSL ?
In Chromium, there is chrome/src/base/md5.{h,cc}. Should I copy
this in WebCore/platform/chromium, or add dependency to base from
WebCore?
How about other ports? is it ok to link openssl or some other
library? (or use implementation used in chromium?)
I'm also wonder I need to put these functions in namespace WebCore.
If you put this code in WebCore, it should go in the WebCore
namespace. I think it would also be a good idea to turn the API into
something more WebCore-ish, something like:
namespace WebCore {
class MD5 {
MD5(); // what was MD5_Init
addBytes(uint8_t* input, size_t length); // what was
MD5_Update ; or maybe this should take a Vector<uint8_t>?
Vector<uint8_t, 16> checksum(); // what was MD5_Final
};
}
(The key point being to match the coding style guidelines for names,
but it also seems better to use a class here instead of a struct and
functions that take a pointer to it.)
Regards,
Maciej
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