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+--- Thread: How do I unpack encrypted image files? Hex Editor identifies it as JFIF (/thread-39606.html)
How do I unpack encrypted image files? Hex Editor identifies it as JFIF - otchi - 08-30-2021
One of the android games I'm unpacking has files with no extension. I inspected with Hex Editor, and I think it identifies the data as JFIF. Not sure what to do with this next. Simply renaming the file extension to JPG or JFIF shows me the image's thumbnail, but I can't open the picture. Image viewers detects the image as corrupted.
RE: How do I unpack encrypted image files? Hex Editor identifies it as JFIF - Raccoon Sam - 08-30-2021
Attach the file here, maybe we can take a look to see what's up!
RE: How do I unpack encrypted image files? Hex Editor identifies it as JFIF - otchi - 08-31-2021
(08-30-2021, 10:32 AM)Raccoon Sam Wrote: Attach the file here, maybe we can take a look to see what's up!
Here it is. https://www.4shared.com/file/bwpLMwN5iq/1a2fc9ed9ee7ccfdbf9a66d66820f3.html
I'm guessing the file is encrypted somehow?
RE: How do I unpack encrypted image files? Hex Editor identifies it as JFIF - Raccoon Sam - 08-31-2021
normal JPGs start with the bytes:
FF D8 FF E0
your JPG started with the bytes
F1 F6 F4 D7 BE 1C 79 D7 7B F5 ED 5E E1 B7 1B 6F BE 5B 7B 9D 35 F1 CD 5F F1 EE 75 6F 5E 5C FF D8 FF E0
so delete the first thirty and boom it's fixed. see attachment
RE: How do I unpack encrypted image files? Hex Editor identifies it as JFIF - otchi - 08-31-2021
(08-31-2021, 07:01 AM)Raccoon Sam Wrote: normal JPGs start with the bytes:
FF D8 FF E0
your JPG started with the bytes
F1 F6 F4 D7 BE 1C 79 D7 7B F5 ED 5E E1 B7 1B 6F BE 5B 7B 9D 35 F1 CD 5F F1 EE 75 6F 5E 5C FF D8 FF E0
so delete the first thirty and boom it's fixed. see attachment
Oh wow, so it's THAT simple? Just delete everything that comes before FF D8 FF E0?
Thanks so much!
Do I need to rename the file extension to "JPG" too? The file in the game's database has no extensions.
RE: How do I unpack encrypted image files? Hex Editor identifies it as JFIF - Raccoon Sam - 09-01-2021
(08-31-2021, 04:10 PM)otchi Wrote:(08-31-2021, 07:01 AM)Raccoon Sam Wrote: normal JPGs start with the bytes:
FF D8 FF E0
your JPG started with the bytes
F1 F6 F4 D7 BE 1C 79 D7 7B F5 ED 5E E1 B7 1B 6F BE 5B 7B 9D 35 F1 CD 5F F1 EE 75 6F 5E 5C FF D8 FF E0
so delete the first thirty and boom it's fixed. see attachment
Oh wow, so it's THAT simple? Just delete everything that comes before FF D8 FF E0?
Thanks so much!
Do I need to rename the file extension to "JPG" too? The file in the game's database has no extensions.
Without seeing any other files I can't give any definite answers, as they might be different, but yeah that's pretty much the gist of it. All you need to know is that all valid JPEGs start with "FF D8 FF" and end/terminate with the JPEG trailer, which is "FF D9"
Renaming them to .jpg is wise
RE: How do I unpack encrypted image files? Hex Editor identifies it as JFIF - otchi - 09-01-2021
(09-01-2021, 01:46 AM)Raccoon Sam Wrote:(08-31-2021, 04:10 PM)otchi Wrote:(08-31-2021, 07:01 AM)Raccoon Sam Wrote: normal JPGs start with the bytes:
FF D8 FF E0
your JPG started with the bytes
F1 F6 F4 D7 BE 1C 79 D7 7B F5 ED 5E E1 B7 1B 6F BE 5B 7B 9D 35 F1 CD 5F F1 EE 75 6F 5E 5C FF D8 FF E0
so delete the first thirty and boom it's fixed. see attachment
Oh wow, so it's THAT simple? Just delete everything that comes before FF D8 FF E0?
Thanks so much!
Do I need to rename the file extension to "JPG" too? The file in the game's database has no extensions.
Without seeing any other files I can't give any definite answers, as they might be different, but yeah that's pretty much the gist of it. All you need to know is that all valid JPEGs start with "FF D8 FF" and end/terminate with the JPEG trailer, which is "FF D9"
Renaming them to .jpg is wise
Oh yeah, I managed with the other files. I just wasn't sure what to do with the files detected as JFIFs because the unencrypter program I used didn't do anything with them.
Thanks again!