How to create and import Self Signed Certificate to Android Device
Steps to Install SSL Certificate in Android Device
Due to a bug in android internal code you need some extra steps while generating your certificate. Otherwise your self-signed certificate will not show up under “trusted credentials” in android menu.
Create an auxiliary file “android_options.txt” with this line inside:
Create self-signed certificate using these commands:
- openssl genrsa -out priv_and_pub.key 2048
- openssl req -new -days 3650 -key priv_and_pub.key -out CA.pem
- openssl x509 -req -days 3650 -in CA.pem -signkey priv_and_pub.key -extfile ./android_options.txt -out CA.crt
Now our CA.crt certificate is almost ready.
⏬ ⏬ Get rid of “⚠️ Not Secure” warning with these trusted SSL Certificates ⏬ ⏬
Convert certificate to DER format:
- openssl x509 -inform PEM -outform DER -in CA.crt -out CA.der.crt
- Put the CA.der.crt onto the sdcard of your Android device (usually to internal one). It should be in root directory.
- Go to Settings / Security / Credential storage and select “Install from device storage”.
- The .crt file will be detected and you will be prompted to enter a certificate name.
- After importing the certificate, you will find it in Settings / Security / Credential storage / Trusted credentials / User.