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androidcertificate
sargam
sargam

Reputation: 111

Unable to install CA certificate on Android Oreo

I am trying to install a certificate on Oreo version of Android. I have downloaded the certificate on internal storage and the format is .cer and pin is set for lock screen.

I have tried following steps:

Settings-- Security & Lockscreen-- Credential storage-- Install from storage--

I can see the cert file but it is greyed out and there is no option to select it.

Is there any way to do it?

Upvotes: 11

Views: 16267

Answers (3)

AndreKR
AndreKR

Reputation: 33678

I had to rename the certificate file from .der to .crt, then I could install it.

Upvotes: 1

ZaydH
ZaydH

Reputation: 689

On my Android 8.1 (Oreo) device, all .der certificates were grayed out, but @brianwood's approach did not work for me. Instead I needed to convert the .der file to .pem before Android would allow it to be installed. The procedure was:

  1. Download openssl (e.g., brew install openssl for MacOS or sudo apt-get install openssl for some Linux distributions)
  2. Convert the certificate to .pem via the command:

openssl x509 -inform der -in <filename>.der -out <filename>.pem

  1. Transfer the .pem file to your Android device (e.g., via Google drive)

Upvotes: 4

brainwood
brainwood

Reputation: 1711

Had the same problem here - Certificates in the download directory were all greyed out.

Pretty sure it's a bug - here's the workaround that worked for me.

I was navigating to the file via the Download shortcut in the Open from sidebar. Instead, don't use the shortcut. From the Open from sidebar, select the base phone storage (labelled as your phone name) and navigate to your Downloads directory manually. Now, my certs can be selected.

Upvotes: 31

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