<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <link rel="stylesheet" href="style.css" type="text/css"> <meta content="text/html; charset=iso-8859-1" http-equiv="Content-Type"> <link rel="Start" href="index.html"> <link rel="previous" href="Dbm.html"> <link rel="next" href="Dynlink.html"> <link rel="Up" href="index.html"> <link title="Index of types" rel=Appendix href="index_types.html"> <link title="Index of exceptions" rel=Appendix href="index_exceptions.html"> <link title="Index of values" rel=Appendix href="index_values.html"> <link title="Index of modules" rel=Appendix href="index_modules.html"> <link title="Index of module types" rel=Appendix href="index_module_types.html"> <link title="Arg" rel="Chapter" href="Arg.html"> <link title="Arith_status" rel="Chapter" href="Arith_status.html"> <link title="Array" rel="Chapter" href="Array.html"> <link title="ArrayLabels" rel="Chapter" href="ArrayLabels.html"> <link title="Big_int" rel="Chapter" href="Big_int.html"> <link title="Bigarray" rel="Chapter" href="Bigarray.html"> <link title="Buffer" rel="Chapter" href="Buffer.html"> <link title="Callback" rel="Chapter" href="Callback.html"> <link title="CamlinternalLazy" rel="Chapter" href="CamlinternalLazy.html"> <link title="CamlinternalMod" rel="Chapter" href="CamlinternalMod.html"> <link title="CamlinternalOO" rel="Chapter" href="CamlinternalOO.html"> <link title="Char" rel="Chapter" href="Char.html"> <link title="Complex" rel="Chapter" href="Complex.html"> <link title="Condition" rel="Chapter" href="Condition.html"> <link title="Dbm" rel="Chapter" href="Dbm.html"> <link title="Digest" rel="Chapter" href="Digest.html"> <link title="Dynlink" rel="Chapter" href="Dynlink.html"> <link title="Event" rel="Chapter" href="Event.html"> <link title="Filename" rel="Chapter" href="Filename.html"> <link title="Format" rel="Chapter" href="Format.html"> <link title="Gc" rel="Chapter" href="Gc.html"> <link title="Genlex" rel="Chapter" href="Genlex.html"> <link title="Graphics" rel="Chapter" href="Graphics.html"> <link title="GraphicsX11" rel="Chapter" href="GraphicsX11.html"> <link title="Hashtbl" rel="Chapter" href="Hashtbl.html"> <link title="Int32" rel="Chapter" href="Int32.html"> <link title="Int64" rel="Chapter" href="Int64.html"> <link title="Lazy" rel="Chapter" href="Lazy.html"> <link title="Lexing" rel="Chapter" href="Lexing.html"> <link title="List" rel="Chapter" href="List.html"> <link title="ListLabels" rel="Chapter" href="ListLabels.html"> <link title="Map" rel="Chapter" href="Map.html"> <link title="Marshal" rel="Chapter" href="Marshal.html"> <link title="MoreLabels" rel="Chapter" href="MoreLabels.html"> <link title="Mutex" rel="Chapter" href="Mutex.html"> <link title="Nativeint" rel="Chapter" href="Nativeint.html"> <link title="Num" rel="Chapter" href="Num.html"> <link title="Obj" rel="Chapter" href="Obj.html"> <link title="Oo" rel="Chapter" href="Oo.html"> <link title="Parsing" rel="Chapter" href="Parsing.html"> <link title="Pervasives" rel="Chapter" href="Pervasives.html"> <link title="Printexc" rel="Chapter" href="Printexc.html"> <link title="Printf" rel="Chapter" href="Printf.html"> <link title="Queue" rel="Chapter" href="Queue.html"> <link title="Random" rel="Chapter" href="Random.html"> <link title="Scanf" rel="Chapter" href="Scanf.html"> <link title="Set" rel="Chapter" href="Set.html"> <link title="Sort" rel="Chapter" href="Sort.html"> <link title="Stack" rel="Chapter" href="Stack.html"> <link title="StdLabels" rel="Chapter" href="StdLabels.html"> <link title="Str" rel="Chapter" href="Str.html"> <link title="Stream" rel="Chapter" href="Stream.html"> <link title="String" rel="Chapter" href="String.html"> <link title="StringLabels" rel="Chapter" href="StringLabels.html"> <link title="Sys" rel="Chapter" href="Sys.html"> <link title="Thread" rel="Chapter" href="Thread.html"> <link title="ThreadUnix" rel="Chapter" href="ThreadUnix.html"> <link title="Tk" rel="Chapter" href="Tk.html"> <link title="Unix" rel="Chapter" href="Unix.html"> <link title="UnixLabels" rel="Chapter" href="UnixLabels.html"> <link title="Weak" rel="Chapter" href="Weak.html"><title>Digest</title> </head> <body> <div class="navbar"><a href="Dbm.html">Previous</a> <a href="index.html">Up</a> <a href="Dynlink.html">Next</a> </div> <center><h1>Module <a href="type_Digest.html">Digest</a></h1></center> <br> <pre><span class="keyword">module</span> Digest: <code class="code"><span class="keyword">sig</span></code> <a href="Digest.html">..</a> <code class="code"><span class="keyword">end</span></code></pre>MD5 message digest. <p> This module provides functions to compute 128-bit ``digests'' of arbitrary-length strings or files. The digests are of cryptographic quality: it is very hard, given a digest, to forge a string having that digest. The algorithm used is MD5.<br> <hr width="100%"> <pre><span id="TYPEt"><span class="keyword">type</span> <code class="type"></code>t</span> = <code class="type">string</code> </pre> <div class="info"> The type of digests: 16-character strings.<br> </div> <pre><span id="VALstring"><span class="keyword">val</span> string</span> : <code class="type">string -> <a href="Digest.html#TYPEt">t</a></code></pre><div class="info"> Return the digest of the given string.<br> </div> <pre><span id="VALsubstring"><span class="keyword">val</span> substring</span> : <code class="type">string -> int -> int -> <a href="Digest.html#TYPEt">t</a></code></pre><div class="info"> <code class="code"><span class="constructor">Digest</span>.substring s ofs len</code> returns the digest of the substring of <code class="code">s</code> starting at character number <code class="code">ofs</code> and containing <code class="code">len</code> characters.<br> </div> <pre><span id="VALchannel"><span class="keyword">val</span> channel</span> : <code class="type"><a href="Pervasives.html#TYPEin_channel">in_channel</a> -> int -> <a href="Digest.html#TYPEt">t</a></code></pre><div class="info"> If <code class="code">len</code> is nonnegative, <code class="code"><span class="constructor">Digest</span>.channel ic len</code> reads <code class="code">len</code> characters from channel <code class="code">ic</code> and returns their digest, or raises <code class="code"><span class="constructor">End_of_file</span></code> if end-of-file is reached before <code class="code">len</code> characters are read. If <code class="code">len</code> is negative, <code class="code"><span class="constructor">Digest</span>.channel ic len</code> reads all characters from <code class="code">ic</code> until end-of-file is reached and return their digest.<br> </div> <pre><span id="VALfile"><span class="keyword">val</span> file</span> : <code class="type">string -> <a href="Digest.html#TYPEt">t</a></code></pre><div class="info"> Return the digest of the file whose name is given.<br> </div> <pre><span id="VALoutput"><span class="keyword">val</span> output</span> : <code class="type"><a href="Pervasives.html#TYPEout_channel">out_channel</a> -> <a href="Digest.html#TYPEt">t</a> -> unit</code></pre><div class="info"> Write a digest on the given output channel.<br> </div> <pre><span id="VALinput"><span class="keyword">val</span> input</span> : <code class="type"><a href="Pervasives.html#TYPEin_channel">in_channel</a> -> <a href="Digest.html#TYPEt">t</a></code></pre><div class="info"> Read a digest from the given input channel.<br> </div> <pre><span id="VALto_hex"><span class="keyword">val</span> to_hex</span> : <code class="type"><a href="Digest.html#TYPEt">t</a> -> string</code></pre><div class="info"> Return the printable hexadecimal representation of the given digest.<br> </div> </body></html>