Download failure for retrieve certification from specific website

[KrasnayaPloshchad]

I just try to download https://piasecki.com/wp-content/uploads/2021/01/piasecki_transparent.png and then I receive the following IO error message on screen:

java.security.cert.CertPathValidatorException: Trust anchor for certification path not found.

Is there any way to work around?

[proninyaroslav]

I tried to download and everything is fine. This means that your device doesn't have a root certificate. Navi doesn't have an option to disable SSL certificate verification as it's dangerous.

[Kita2345]

Error occurred on Android 5

[proninyaroslav]

This site uses Let's Encrypt certificate, which no longer works on Android 5 and below https://scotthelme.co.uk/lets-encrypt-old-root-expiration/. Navi uses the system certificate store.

[Kita2345]

Try this https://greenscene.co.id/wp-content/uploads/2021/05/Arlong-696x497.jpg

[proninyaroslav]

It also uses Let's Encrypt certificate.

[Kita2345]

I tried to download and everything is fine on Android 5

[proninyaroslav]

This problem may not be with all Android 5 devices.

[proninyaroslav]

Similar to https://github.com/TachibanaGeneralLaboratories/download-navi/issues/18

[Kita2345]

Hi, This problem is caused by not supporting TLS1.3 certificate. But since TLS1.3 is provided from Android 10 or higher, it seems that the problem will still occur in Android 9 and lower versions.