Android Question Encrypt/Decrypt uploaded files between B4X and PHP

[somed3v3loper]

Hello all,

I need to upload a file to a php hosting and want PHP to encrypt it in a way that is compatible with B4X so I can download it later from B4X and decrypt it .

Is this possible ? Do we have a working example ? Files can be large .
Or should I encrypt it (in B4J for example) before uploading ?

Regrards

 

[MarkusR]

my question is why u need Encrypt/Decrypt it, you can't use https ?
or you will store data Encrypted at web hosting ?

see similar threads
B4X Library B4XEncryption
B4A Library AES Encrypt/Decrypt (Encryption/Decryption) B4A and B4J library
B4A Class [B4A/B4J] LockBox3 (Delphi) AES ECB/CBC encrypting / decrypting

 

[somed3v3loper]

my question is why u need Encrypt/Decrypt it, you can't use https ?
or you will store data Encrypted at web hosting ?

see similar threads
B4X Library B4XEncryption
B4A Library AES Encrypt/Decrypt (Encryption/Decryption) B4A and B4J library
B4A Class [B4A/B4J] LockBox3 (Delphi) AES ECB/CBC encrypting / decrypting

I want to secure the files even if someone got the download links

 

[KMatle]

Use the search function and you'll find examples. AES-256 is perfect for that. Read the file, convert it to bytes, encrypt in B4x, upload it and decrypt whenever you need to. Use the Encryption lib.

 

[MarkusR]

you can upload the Encrypted files from b4a/b4j with lib okhttputils2.
at server side you can store it in file system or database. the long blob field type in mysql can store 4 GB.
with a virtual server hosting it should be possible to access a database direct via jRDC2.
u have to balance pro and cons using files in a database.