Possible issue. Some audiobooks do not decrypt properly.

[erwin-sc]

Specifically, audiobooks I have that are from Blackstone publishing do not download correctly and end up as small empty files that contain an error xml within each mp3 file.

From what I have tested, I am able to download from other publishers without issue.

I also downloaded the problematic books on my phone using the official kobo app and they work normally within the app. The encrypted file format (*.enc) is the same as other books from other publishers.

Example audiobooks from blackstone audio which fail to decrypt:
https://www.kobo.com/us/en/audiobook/what-if-100
https://www.kobo.com/us/en/audiobook/the-anatomy-of-peace-expanded-second-edition-1

**_List of blackstone audiobooks (in case, the problem is with this specific publisher) -> https://www.kobo.com/us/en_**/search?query=Blackstone+Publishing&fcsearchfield=Imprint&pageNumber=1&sort=PriceAsc

Example error xml inside the mp3 files ->

SignatureDoesNotMatchThe request signature we calculated does not match the signature you provided. Check your key and signing method.AKIAJMHJ7ATYWKDD65OAAWS4-HMAC-SHA256
20211206T160208Z
20211206/us-west-2/s3/aws4_request
64876e484ce32b0a06b3df9f2929182140b9b422c2b091bee7f2251837f570599d1c3f8eb174fde190855921362ad58638e7a0ed3a0b40b2d768d565944dda5241 57 53 34 2d 48 4d 41 43 2d 53 48 41 32 35 36 0a 32 30 32 31 31 32 30 36 54 31 36 30 32 30 38 5a 0a 32 30 32 31 31 32 30 36 2f 75 73 2d 77 65 73 74 2d 32 2f 73 33 2f 61 77 73 34 5f 72 65 71 75 65 73 74 0a 36 34 38 37 36 65 34 38 34 63 65 33 32 62 30 61 30 36 62 33 64 66 39 66 32 39 32 39 31 38 32 31 34 30 62 39 62 34 32 32 63 32 62 30 39 31 62 65 65 37 66 32 32 35 31 38 33 37 66 35 37 30 35 39GET
/9/9/9975/mp3/9975-56.mp3
X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAJMHJ7ATYWKDD65OA%2F20211206%2Fus-west-2%2Fs3%2Faws4_request&X-Amz-Date=20211206T160208Z&X-Amz-Expires=600&X-Amz-SignedHeaders=host%3Bx-amz-request-payer
host:bsa-dist-kobo.s3-accelerate.amazonaws.com
x-amz-request-payer:

host;x-amz-request-payer
UNSIGNED-PAYLOAD47 45 54 0a 2f 39 2f 39 2f 39 39 37 35 2f 6d 70 33 2f 39 39 37 35 2d 35 36 2e 6d 70 33 0a 58 2d 41 6d 7a 2d 41 6c 67 6f 72 69 74 68 6d 3d 41 57 53 34 2d 48 4d 41 43 2d 53 48 41 32 35 36 26 58 2d 41 6d 7a 2d 43 72 65 64 65 6e 74 69 61 6c 3d 41 4b 49 41 4a 4d 48 4a 37 41 54 59 57 4b 44 44 36 35 4f 41 25 32 46 32 30 32 31 31 32 30 36 25 32 46 75 73 2d 77 65 73 74 2d 32 25 32 46 73 33 25 32 46 61 77 73 34 5f 72 65 71 75 65 73 74 26 58 2d 41 6d 7a 2d 44 61 74 65 3d 32 30 32 31 31 32 30 36 54 31 36 30 32 30 38 5a 26 58 2d 41 6d 7a 2d 45 78 70 69 72 65 73 3d 36 30 30 26 58 2d 41 6d 7a 2d 53 69 67 6e 65 64 48 65 61 64 65 72 73 3d 68 6f 73 74 25 33 42 78 2d 61 6d 7a 2d 72 65 71 75 65 73 74 2d 70 61 79 65 72 0a 68 6f 73 74 3a 62 73 61 2d 64 69 73 74 2d 6b 6f 62 6f 2e 73 33 2d 61 63 63 65 6c 65 72 61 74 65 2e 61 6d 61 7a 6f 6e 61 77 73 2e 63 6f 6d 0a 78 2d 61 6d 7a 2d 72 65 71 75 65 73 74 2d 70 61 79 65 72 3a 0a 0a 68 6f 73 74 3b 78 2d 61 6d 7a 2d 72 65 71 75 65 73 74 2d 70 61 79 65 72 0a 55 4e 53 49 47 4e 45 44 2d 50 41 59 4c 4f 41 44J797JFRVEMQ6QFGA+dI6ChFgl1katXB7FiJpZ8XGa15CzFVjkwl/0pqlT26u0cGKEg0lFHjds5B0wO6qXeDJo7+aDeDgMl2jSHKiSw==

[subdavis]

Converted to #69 since this is clearly a bug, thanks.