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<?xml version="1.0" encoding="iso-8859-1"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html> <head> <title>secure_compare (lib/rack/utils.rb)</title> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> <link rel="stylesheet" href="../../../.././rdoc-style.css" type="text/css" media="screen" /> </head> <body class="standalone-code"> <pre><span class="ruby-comment cmt"># File lib/rack/utils.rb, line 431</span> <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">secure_compare</span>(<span class="ruby-identifier">a</span>, <span class="ruby-identifier">b</span>) <span class="ruby-keyword kw">return</span> <span class="ruby-keyword kw">false</span> <span class="ruby-keyword kw">unless</span> <span class="ruby-identifier">bytesize</span>(<span class="ruby-identifier">a</span>) <span class="ruby-operator">==</span> <span class="ruby-identifier">bytesize</span>(<span class="ruby-identifier">b</span>) <span class="ruby-identifier">l</span> = <span class="ruby-identifier">a</span>.<span class="ruby-identifier">unpack</span>(<span class="ruby-value str">"C*"</span>) <span class="ruby-identifier">r</span>, <span class="ruby-identifier">i</span> = <span class="ruby-value">0</span>, <span class="ruby-value">-1</span> <span class="ruby-identifier">b</span>.<span class="ruby-identifier">each_byte</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">v</span><span class="ruby-operator">|</span> <span class="ruby-identifier">r</span> <span class="ruby-operator">|=</span> <span class="ruby-identifier">v</span> <span class="ruby-operator">^</span> <span class="ruby-identifier">l</span>[<span class="ruby-identifier">i</span><span class="ruby-operator">+=</span><span class="ruby-value">1</span>] } <span class="ruby-identifier">r</span> <span class="ruby-operator">==</span> <span class="ruby-value">0</span> <span class="ruby-keyword kw">end</span></pre> </body> </html>
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