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Code Issues Releases Wiki Activity

Updated FAQ

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M66B 2020-05-24 13:39:18 +02:00
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FAQ.md
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@ -693,6 +693,23 @@ Common errors:
* *No certificate found matching targetContraints*: this likely means you are using an old version of FairEmail
* *unable to find valid certification path to requested target*: basically this means one or more intermediate or root certificates were not found
In case the certificate chain is incorrect, you can tap on the little info button to show the all certificates.
After the certificate details the issuer or "selfSign" is shown.
A certificate is self signed when the subject and the issuer are the same.
Certificates from a certificate authority (CA) are marked with "[keyCertSign](https://tools.ietf.org/html/rfc5280#section-4.2.1.3)".
Certificates found in the Android key store are marked with "Android".
A valid chain looks like this:
```
Your certificate > zero or more intermediate certificates > CA (root) certificate marked with "Android"
```
Note that a certificate chain will always be invalid when no anchor certificate can be found in the Android key store,
which is fundamental to S/MIME certificate validation.
Please see [here](https://support.google.com/pixelphone/answer/2844832?hl=en) how you can import certificates into the Android key store.
The use of expired keys, inline encrypted/signed messages and hardware security tokens is not supported.
If you are looking for a free (test) S/MIME certificate, see [here](http://kb.mozillazine.org/Getting_an_SMIME_certificate) for the options.