Class: Cryptosphere::Blob::Builder
- Inherits:
-
Object
- Object
- Cryptosphere::Blob::Builder
- Defined in:
- lib/cryptosphere/blobs/blob.rb
Overview
Encrypt a node and insert it into the local store
Instance Method Summary collapse
- #finish ⇒ Object
-
#initialize ⇒ Builder
constructor
A new instance of Builder.
- #write(data) ⇒ Object (also: #<<)
Constructor Details
#initialize ⇒ Builder
Returns a new instance of Builder.
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# File 'lib/cryptosphere/blobs/blob.rb', line 64 def initialize @hash_function = Cryptosphere.hash_function @hash_function << PREFIX @file = Tempfile.new 'cryptosphere' end |
Instance Method Details
#finish ⇒ Object
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# File 'lib/cryptosphere/blobs/blob.rb', line 77 def finish keys = Cryptosphere.kdf(@hash_function.digest, size: 64) key, iv = keys[0...32], keys[32...64] block_cipher = Cryptosphere.block_cipher block_cipher.encrypt block_cipher.key, block_cipher.iv = key, iv @file.rewind output = Tempfile.new 'cryptosphere' begin hash_function = Cryptosphere.hash_function while plaintext = @file.read(4096) ciphertext = block_cipher.update(plaintext) output << ciphertext hash_function << ciphertext end ciphertext = block_cipher.final output << ciphertext hash_function << ciphertext output.close node_id = hash_function.hexdigest FileUtils.mv output.path, File.join(Blob.path, node_id) Blob.new(node_id, key + iv) rescue Exception output.close rescue nil output.unlink rescue nil raise end ensure @file.close rescue nil @file.unlink rescue nil end |
#write(data) ⇒ Object Also known as: <<
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# File 'lib/cryptosphere/blobs/blob.rb', line 71 def write(data) @hash_function << data @file << data end |