Goodmorning, i am forced to use AS3 (AIR desktop), and i have to calculate HMAC SHA256 of a string, using a string key, and obtaining a string result.
This is what i would do if i could do it without AS3:
[linux]$ echo -n "symbol=LTCBTC&side=BUY&type=LIMIT&timeInForce=GTC&quantity=1&price=0.1&recvWindow=5000×tamp=1499827319559" | openssl dgst -sha256 -hmac "NhqPtmdSJYdKjVHjA7PZj4Mge3R5YNiP1e3UZjInClVN65XAbvqqM6A7H5fATj0j"
(stdin)= c8db56825ae71d6d79447849e617115f4a920fa2acdcab2b053c4b2838bd6b71
How can i obtain the same result, with AS3?
I have found the answer:
AS3 HMAC SHA-256 for Adobe AIR (desktop)
com.adobe.crypto is what you are searching for.
Related
I have a question regarding combination of Google Cast + DRM Streaming.
What we have:
Google Cast “Sender App” feature inside our mobile app that sends stream to TV
without implementing a “Receiver App” logic inside our TV app, because we want to use default Cast logic.
It works for open streams (without DRM).
And doesn’t work for DRM Streams.
Looks like we cannot implement simple “Sender App” for DRM Streams.
Documentation reference:
"However, if you would like to Cast DRM protected content, you should build and host your own Web Receiver" from https://developers.google.com/cast/docs/android_sender/exoplayer
Question:
Are there any successfull examples of Cast implementation among without a custom “Receiver App”?
Thanks!
Yes there are, I implemented the casting feature using the exoplayer cast extension. There isn't so much documentation on it but the exoplayer github repo helped me implement it. https://github.com/google/ExoPlayer/tree/release-v2/extensions/cast
I want to be able to encode video frames using Media Foundation IMFTransform for H264 Video Encoding. That's easily doable in Win32, where you can use MFTEnumEx to enumerate the transforms and find the H264 encoder.
However, on WinRT (Store Apps), I can't find a way to instantiate.
I've noticed there's a class CMSH264EncoderMFT, but there's no definition for the CLSID to use on CoCreateInstance.
With:
CoCreateInstance(CLSID_CMSH264EncoderMFT, nullptr, CLSCTX_INPROC_SERVER, __uuidof(IUnknown), (void **)&pUnknown);
CLSID_CMSH264EncoderMFT is undefined for WinRT apps.
And tried:
ComPtr<CMSH264EncoderMFT> encoder = Make<CMSH264EncoderMFT>();
It says the class CMSH264EncoderMFT is incomplete, and says "use of undefined type 'CMSH264EncoderMFT'". Don't even know if the syntax for Make is correct or appropriate...
Does anyone have a clue on how to do this for WinRT?
Use MFCreateSinkWriterFromURL to create a file writer first. Then, use MFCreateMediaType to create an IMFMediaType. Set up its properties, one of which will be the output format: use SetGUID method on the media type with MF_MT_SUBTYPE guid and specify MFVideoFormat_H264 as the argument. Finally, use AddStream method on the sink writer to set the media type to it.
There's an example here (you'll need to modify it a bit when it sets MF_MT_SUBTYPE).
you cannot instantiate object via CMSH264EncoderMFT because it DOES NOT have some interfaces which MUST have object in WinRT for example IInspectable - Provides functionality required for all Windows Runtime classes. CMSH264EncoderMFT IS NOT WinRT class. You can try resolve your task by function MFCreateSinkWriterFromMediaSink - this function takes an object with interface IMFMediaSink. It is possible write code for object with IMFMediaSink interface and receive samples from IMFTransform::ProcessOutput. I just point your attention - you cannot instantiate in WindowsStore code objects which IS NOT Windows Runtime classes.
Regards,
Evgeny Pereguda
I want to make a command line tool by Flash Air, but there is not any api of AS3 to output content to standard output.
Then, I try to use ANE to solve my problem(By making a windows ane and use C's printf function to output content), but it doesn't work.
Is there any methods to use the standard output by Flash air, or to make a command line tool by Flash Air?
The code of dll written by c++ is:
FREObject add(FREContext ctx, void* functionData, uint32_t argc, FREObject argv[])
{
int32_t x,y;
FREGetObjectAsInt32(argv[0], &x);
FREGetObjectAsInt32(argv[1], &y);
int32_t result = x + y;
FREObject resObj;
FRENewObjectFromInt32(result, &resObj);
//I want to use the "printf" to print content to the console
printf("print by dll: the result is %d\n", result);
return resObj;
}
but there is not any api of AS3 to output content to standard output.
Only a running OS process can give back Standard Output (also called stdio in C).
The best you can do is create an app that looks like commandline tool but in reality it just runs & passes data to the actual (native) OS commandline tool. Meaning in your tool you capture the user command to a string and then run a nativeProcess involving that (parsed) string as your process arguments.
Example in your app user types : calc. Your AIR runs: c:\Windows\System32\calc.exe
Anyways, on to your real question...
I try to use C's printf function to output content, but it doesn't
work.
If you mean you made some test.exe with C and when you get AIR to run it you want to capture the printf output then you can try:
process.addEventListener(ProgressEvent.STANDARD_OUTPUT_DATA, CTest_OutputData);
or
process.addEventListener(ProgressEvent.STANDARD_ERROR_DATA, CTest_ErrorData);
To catch the output (it will be sent as bytes) make sure you have some public byteArray and String created. Here's an example for STANDARD_ERROR_DATA (it's likely the output goes here too, since you claim that STANDARD_OUTPUT_DATA is not working).
The code shown below inside that function works same whichever type of progressEvent you choose. Just put in the "right" one. temp_BA is the byteArray variable you setup earlier.
public function CTest_ErrorData (event:ProgressEvent):void
{
process.standardOutput.readBytes( temp_BA, temp_BA.length, process.standardOutput.bytesAvailable );
if ( temp_BA.length > 0 )
{
temp_String = temp_BA.readUTFBytes(temp_BA.length);
trace( "temp_String is : " + temp_String ); //if you want to check it
}
}
Final TIP: You can get traces inside Flash IDE by disabling "desktop" and keeping "extended desktop" ticked. Both must be ticked later when you make installing app.
We are implementing Windows MDM. In this,we we generate X509Certificate device certificate from PKCS#10 CSR(obtained from device in previuos request) using BC library.
Now problem is subject property of device cert has UTF8_STRING encoding and I want to override it to PRINTABLE_STRING.
I need to override behavior of BC library to use ASN.1 type: PRINTABLE_STRING.
But I am not getting way to do it.
So i'm running air 3.7, the latest starling frameworks, added -swf-version=20 -target-player=11.7 in compiler arguments and running the code
[Embed(source="/assets/wtf4.atf", mimeType="application/octet-stream")]
private static const why:Class;
var data:ByteArray = new why();
var texture:starling.textures.Texture = starling.textures.Texture.fromAtfData(data);
var image:Image = new Image(texture);
addChild(image);
if I'm using the starling atf that came with the framework demo it works fine, but whenever i try to display my own png that I create in photoshop converted into atf it gives me a error saying
ArgumentError: Error #3677: Texture decoding failed. Internal error.
The image I'm trying to convert into atf is just a red square png with 512x512 sizes with the compiler arguments: png2atf -c -i example.png -o example.atf. I'm not sure whether my flash builder isn't setup to decode atfs or if i'm creating the atfs wrong for some reason, if someone could shed some light on this it would be awesome!
When creating the .atf, did you created mipmaps also? If not, you need to set the second argument of the Texture.fromAtfData() function to false - don't use Mipmaps.
From Starlign wiki:
"If you omit mipmaps, you must set the parameter “useMipMaps” of the “Texture.fromAtfData()” method to “false”! Otherwise, you'll get a run-time error."
http://wiki.starling-framework.org/manual/atf_textures
The latest version of ATF requires AIR 3.8 (which is currently in beta). You need to download the AIR installer, and the latest AIR SDK. More details here: http://forum.starling-framework.org/topic/error-3677-texture-decoding-failed-internal-error