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152 lines
6.0 KiB
HTML
152 lines
6.0 KiB
HTML
## On This Page
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* [Introduction](#docIntro)
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* [Quick Setup](#docQuick)
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* [Installing the mitmproxy CA certificate manually](#docManual)
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* [More on mitmproxy certificates](#docMore)
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* [CA and cert files](#docCertfiles)
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* [Using a custom certificate](#docCustom)
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* [Using a client side certificate](#docClient)
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* [Using a custom certificate authority](#docCA)
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## <a id="docIntro"></a>Introduction
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Mitmproxy can decrypt encrypted traffic on the fly, as long as the client
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trusts its built-in certificate authority. Usually this means that the
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mitmproxy CA certificates have to be installed on the client device.
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## <a id="docQuick"></a>Quick Setup
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By far the easiest way to install the mitmproxy certificates is to use the
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built-in certificate installation app. To do this, just start mitmproxy and
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configure your target device with the correct proxy settings. Now start a
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browser on the device, and visit the magic domain **mitm.it**. You should see
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something like this:
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<img class="img-responsive" src="@!urlTo("certinstall-webapp.png")!@" ></img>
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Click on the relevant icon, and follow the setup instructions for the platform
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you're on, and you are good to go.
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## <a id="docManual"></a>Installing the mitmproxy CA certificate manually
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Sometimes using the quick install app is not an option - Java or the IOS
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similator spring to mind - or you just need to do it manually for some other
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reason. Below is a list of pointers to manual certificate installation
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documentation for some common platforms:
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<table class="table">
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<tr>
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<td><a href="https://github.com/ADVTOOLS/ADVTrustStore#how-to-use-advtruststore"</a>iOS Simulator</td>
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<td><a href="http://docs.oracle.com/cd/E19906-01/820-4916/geygn/index.html">Java</a></td>
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</tr>
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<tr>
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<td><a href="http://kb.mit.edu/confluence/pages/viewpage.action?pageId=152600377">iOS</a></td>
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<td><a href="http://wiki.cacert.org/FAQ/ImportRootCert#Android_Phones_.26_Tablets">Android/Android Simulator</a></td>
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</tr>
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<tr>
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<td><a href="http://windows.microsoft.com/en-ca/windows/import-export-certificates-private-keys#1TC=windows-7">Windows</a></td>
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<td><a href="https://support.apple.com/kb/PH7297?locale=en_US">Mac OS X</a></td>
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</tr>
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<tr>
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<td><a href="http://askubuntu.com/questions/73287/how-do-i-install-a-root-certificate/94861#94861">Ubuntu/Debian</a></td>
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<td><a href="https://wiki.mozilla.org/MozillaRootCertificate#Mozilla_Firefox">Firefox</a></td>
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</tr>
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<tr>
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<td><a href="https://code.google.com/p/chromium/wiki/LinuxCertManagement">Chrome on Linux</a></td>
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</tr>
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</table>
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## <a id="docMore"></a>More on mitmproxy certificates
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The first time __mitmproxy__ or __mitmdump__ is run, the mitmproxy Certificate
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Authority(CA) is created in the config directory (~/.mitmproxy by default).
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This CA is used for on-the-fly generation of dummy certificates for each of the
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SSL sites that your client visits. Since your browser won't trust the
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__mitmproxy__ CA out of the box , you will see an SSL certificate warning every
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time you visit a new SSL domain through __mitmproxy__. When you are testing a
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single site through a browser, just accepting the bogus SSL cert manually is
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not too much trouble, but there are a many circumstances where you will want to
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configure your testing system or browser to trust the __mitmproxy__ CA as a
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signing root authority.
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## <a id="docCertfiles"></a>CA and cert files
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The files created by mitmproxy in the .mitmproxy directory are as follows:
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<table class="table">
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<tr>
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<td class="nowrap">mitmproxy-ca.pem</td>
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<td>The private key and certificate in PEM format.</td>
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</tr>
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<tr>
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<td class="nowrap">mitmproxy-ca-cert.pem</td>
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<td>The certificate in PEM format. Use this to distribute to most
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non-Windows platforms.</td>
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</tr>
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<tr>
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<td class="nowrap">mitmproxy-ca-cert.p12</td>
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<td>The certificate in PKCS12 format. For use on Windows.</td>
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</tr>
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<tr>
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<td class="nowrap">mitmproxy-ca-cert.cer</td>
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<td>Same file as .pem, but with an extension expected by some Android
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devices.</td>
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</tr>
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</table>
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## <a id="docCustom"></a>Using a custom certificate
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You can use your own certificate by passing the <kbd>--cert</kbd> option to
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mitmproxy. mitmproxy then uses the provided certificate for interception of the
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specified domains instead of generating a certificate signed by its own CA.
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The certificate file is expected to be in the PEM format. You can include
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intermediary certificates right below your leaf certificate, so that you PEM
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file roughly looks like this:
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<pre>
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-----BEGIN PRIVATE KEY-----
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<private key>
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-----END PRIVATE KEY-----
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-----BEGIN CERTIFICATE-----
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<cert>
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-----END CERTIFICATE-----
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-----BEGIN CERTIFICATE-----
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<intermediary cert (optional)>
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-----END CERTIFICATE-----
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</pre>
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For example, you can generate a certificate in this format using these instructions:
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<pre class="terminal">
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$ openssl genrsa -out cert.key 2048
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$ openssl req -new -x509 -key cert.key -out cert.crt
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(Specify the mitm domain as Common Name, e.g. *.google.com)
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$ cat cert.key cert.crt > cert.pem
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$ mitmproxy --cert=cert.pem
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</pre>
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## <a id="docClient"></a>Using a client side certificate
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You can use a client certificate by passing the <kbd>--client-certs
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DIRECTORY</kbd> option to mitmproxy. If you visit example.org, mitmproxy looks
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for a file named example.org.pem in the specified directory and uses this as
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the client cert. The certificate file needs to be in the PEM format and should
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contain both the unencrypted private key and the certificate.
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## <a id="docCA"></a>Using a custom certificate authority
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By default, mitmproxy will use <samp>~/.mitmproxy/mitmproxy-ca.pem</samp> as
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the certificate authority to generate certificates for all domains for which no
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custom certificate is provided (see above). You can use your own certificate
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authority by passing the <kbd>--confdir</kbd> option to mitmproxy. Mitmproxy
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will then look for <samp>mitmproxy-ca.pem</samp> in the specified directory. If
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no such file exists, it will be generated automatically.
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