[Question] How to open and decode a string line by line when it was before encrypted

[Piioo]

Environment

Provide at least:

• ruby 2.7.6p219
• symmetric-encryption (4.5.0)
• Rails 6

Expected Behavior

When I encrypt a string with SymmetricEncryption.encrypt then it should be decrypted by SymmetricEncryption::Reader.open line by line too.
https://encryption.rocketjob.io/ -> Large File Encryption

Actual Behavior

This code is not working, when I only pass the encrypted string into the open method

foo = SymmetricEncryption.encrypt('foo', random_iv: false, compress: false, type: :string)
foo = StringIO.new(foo)
SymmetricEncryption::Reader.open(foo) do |file|
  file.each_line do |line|
     puts '###############'
     puts line
  end
end

# OpenSSL::Cipher::CipherError: bad decrypt

But it works when I Base64.decode64 the string before. But does the line by line have any sense in large files, when we have first to decode64 it?

foo = SymmetricEncryption.encrypt('foo', random_iv: false, compress: false, type: :string)
foo = StringIO.new(Base64.decode64(foo))
SymmetricEncryption::Reader.open(foo) do |file|
  file.each_line do |line|
     puts '###############'
     puts line
  end
end

# ###############
# foo

[reidmorrison]

Yes, in files we don't typically perform base 64 encoding, whereas storing encrypted data in the database we usually convert it to base 64 before saving. If you want to save the encrypted data in a binary column, you can set the encoding option to :none. Not recommended since we tried it in a proof of concept and ran into several challenges.