Moving nextgen from a branch to the trunk!!!

git-svn-id: https://beef.googlecode.com/svn/trunk@908 b87d56ec-f9c0-11de-8c8a-61c5e9addfc9

core/main/crypto.rb

@@ -0,0 +1,30 @@
+module BeEF
+module Core
+  #
+  # This module provides crypto functionality
+  #
+  module Crypto
+    
+    # the minimum length of the security token
+    TOKEN_MINIMUM_LENGTH = 15
+    
+    #
+    # Generate a secure random token
+    #
+    # @param: {Integer} the length of the secure token
+    #
+    def self.secure_token(len = nil)
+      # get default length from config
+      config = BeEF::Core::Configuration.instance
+      token_length = len || config.get('beef.crypto_default_value_length').to_i
+      
+      # type checking
+      raise Exception::TypeError, "Token length is less than the minimum length enforced by the framework: #{TOKEN_MINIMUM_LENGTH}" if (token_length < TOKEN_MINIMUM_LENGTH)
+      
+      # return random hex string
+      return OpenSSL::Random.random_bytes(token_length).unpack("H*")[0]
+    end
+  
+  end
+end
+end