# Certutil fails with self-signed certificate error

**URL:** <https://discourse.mitmproxy.org/t/certutil-fails-with-self-signed-certificate-error/946>\
**Category:** help\
**Created:** [March 30, 2018, 6:21pm UTC](https://discourse.mitmproxy.org/t/certutil-fails-with-self-signed-certificate-error/946 "2018-03-30T18:21:32Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![qyaz](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.mitmproxy.org/qyaz/32/210_2.png) [@qyaz](https://discourse.mitmproxy.org/u/qyaz)\
**Post date:** [March 30, 2018, 6:21pm UTC](https://discourse.mitmproxy.org/t/certutil-fails-with-self-signed-certificate-error/946/1 "2018-03-30T18:21:32Z")

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hi.

I am trying to add the **mitmproxy-ca-cert.p12** certificate via cli in **Windows 10 (17.09)** with:

```
certutil.exe -importpfx Root mitmproxy-ca-cert.p12

```

It asks an admin prompt. So inside an admin cmd.exe, it fails with:

```
certutil.exe -importpfx Root mitmproxy-ca-cert.p12
Entrez le mot de passe PFX :
CertUtil : -importPFX ÉCHEC de la commande : 0x80092007 (-2146885625 CRYPT_E_SELF_SIGNED)
CertUtil: Le certificat spécifié est auto-signé.

```

I use a blank password, is that right ? If not, what is the password ?

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<div class="post-metadata">

**Author:** ![mhils](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.mitmproxy.org/mhils/32/7_2.png) [@mhils](https://discourse.mitmproxy.org/u/mhils)\
**Post date:** [March 31, 2018, 3:21pm UTC](https://discourse.mitmproxy.org/t/certutil-fails-with-self-signed-certificate-error/946/2 "2018-03-31T15:21:54Z")

</div>

How old is your `<your user folder>/.mitmproxy` folder? If you created your root certificate authority with an older version, can you delete `~/.mitmproxy` and try again?

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<div class="post-metadata">

**Author:** ![qyaz](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.mitmproxy.org/qyaz/32/210_2.png) [@qyaz](https://discourse.mitmproxy.org/u/qyaz)\
**Post date:** [April 1, 2018, 9:31am UTC](https://discourse.mitmproxy.org/t/certutil-fails-with-self-signed-certificate-error/946/3 "2018-04-01T09:31:41Z")

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the folder was just created for the first time when Iaunched by mimtproxy for the first time. Just hours ago.

I could try deleting it and retry but I don’t think that will change anything. Unless the certificate is changed at each rerun.

Tihs is Windows 10 HOME 17.09

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<div class="post-metadata">

**Author:** ![mhils](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.mitmproxy.org/mhils/32/7_2.png) [@mhils](https://discourse.mitmproxy.org/u/mhils)\
**Post date:** [April 2, 2018, 5:03pm UTC](https://discourse.mitmproxy.org/t/certutil-fails-with-self-signed-certificate-error/946/4 "2018-04-02T17:03:20Z")

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Weird - there’s no password on the certificate, I’m not sure why it’s complaining… :-/

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**Author:** ![haigopal](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.mitmproxy.org/haigopal/32/447_2.png) [@haigopal](https://discourse.mitmproxy.org/u/haigopal)\
**Post date:** [July 14, 2019, 5:56am UTC](https://discourse.mitmproxy.org/t/certutil-fails-with-self-signed-certificate-error/946/5 "2019-07-14T05:56:06Z")

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I have the same problem. I just installed the 4.0.4 version, have the same issue.

 ![CertError](https://canada1.discourse-cdn.com/flex030/uploads/mitmproxy1/original/1X/649f94b13c029255e827fedb02a0b94a2924af8c.png)

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<div class="post-metadata">

**Author:** ![haigopal](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.mitmproxy.org/haigopal/32/447_2.png) [@haigopal](https://discourse.mitmproxy.org/u/haigopal)\
**Post date:** [July 14, 2019, 6:21am UTC](https://discourse.mitmproxy.org/t/certutil-fails-with-self-signed-certificate-error/946/6 "2019-07-14T06:21:16Z")

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Similar issue in Kali Linux. Not able to see any certificates added successfully! Not sure what is missting? Any help …

 ![S2httpsErrror](https://canada1.discourse-cdn.com/flex030/uploads/mitmproxy1/original/1X/ce044f8ac2c439aa573927549021da0449a05fed.png)