fast_aes.rb in hexapdf-0.33.0

- old
+ new

@@ -46,11 +46,11 @@
     # Since OpenSSL is a native Ruby extension (that comes bundled with Ruby) it is much faster
     # than the pure Ruby version and it can use the AES-NI instruction set on CPUs when available.
     #
     # This implementation is using AES in Cipher Block Chaining (CBC) mode.
     #
-    # See: PDF1.7 s7.6.2
+    # See: PDF2.0 s7.6.3
     class FastAES
 
       prepend AES
 
       # Uses OpenSSL to generate the requested random bytes.
@@ -66,10 +66,10 @@
       def initialize(key, iv, mode)
         @cipher = OpenSSL::Cipher.new("AES-#{key.length << 3}-CBC")
         @cipher.send(mode)
         @cipher.key = key
         @cipher.iv = iv
-        @cipher.padding = 0
+        @cipher.padding = 0 # Padding handled by HexaPDF, also no @cipher.final call needed
       end
 
       # Encrypts or decrypts the given data whose length must be a multiple of 16.
       def process(data)
         @cipher.update(data)