How can i decrypt large file? about encrypt

[hasimyerlikaya]

I'm sorry for the late reply.

Then I saw that the test is actually working properly. For example, I waited 1 hour for a pdf file and opened successfully. The process takes a long time when opening high-size files.

[leocavalcante]

I have to check where the limitation is. Are you able to make this work using only PointyCastle?

[gsifni]

I have the exact same issue. Large files encrypted and when i decrypt the application freezes without error messages. I have to force close to restore the app.

[leocavalcante]

@gsifni are you able to use the PointyCastle alone without this encrypt package? This doesn't sounds to be an issue with encrypt it self.

[radvansky-tomas]

I have the exact same issue. Large files encrypted and when i decrypt the application freezes without error messages. I have to force close to restore the app.

Same here, no error message and there is no limitation in place.
So its hard to tell why you cannot pass big file, or whats the recommended
approach. I though there will be some sort of "chunked" reading of file
and partial encryption.

[wujek-srujek]

I also notice this issue. It takes about 40 seconds on the iOS simulator with a 1.3 mb image. I tried to investigate, and here are my findings:

• It must be the encryption/decryption logic. Reading the file in memory, and writing again, is fast < 300ms.
• Executing encryption in a separate isolate (as described here: https://flutter.dev/docs/cookbook/networking/background-parsing) is about 3-4 seconds faster, but still very slow. But at least it doesn't cause the application to hang.

I guess anything based o PointyCastle will have the same issue, we would need to look for alternatives. I'm afraid I will have to resort to platform specific code...

[wujek-srujek]

Actually, I've just found something, take a look here: #126 (comment).