How do I sign an APK with the system key using SingApk.jar?

I need to sign an APK using the system keys obtained from Google's source (As an example) using SignApk.jar. However, everytime we try to Sign we get the error below...
This is the command we are using (Please note we are using the Source code downloaded from Google for Android 8.1 for the Pixel).

Besides this method, is there another way to sign an APK with the system key?

java -Xmx2048m -Djava.library.path="out/host/linux-x86/lib64" -jar prebuilts/sdk/tools/lib/signapk.jar -w build/make/target/product/security/platform.x509.pem build/make/target/product/security/platform.pk8 Unsigned-Apk.apk Signed_final_apk.apk

Error: Exception in thread "main" java.lang.ExceptionInInitializerError
at org.conscrypt.OpenSSLBIOInputStream.<init>(OpenSSL BIOInputStream.java:34)
at org.conscrypt.OpenSSLX509Certificate.fromX509PemIn putStream(OpenSSLX509Certificate.java:119)
at org.conscrypt.OpenSSLX509CertificateFactory$1.from X509PemInputStream(OpenSSLX509CertificateFactory.j ava:220)
at org.conscrypt.OpenSSLX509CertificateFactory$1.from X509PemInputStream(OpenSSLX509CertificateFactory.j ava:216)
at org.conscrypt.OpenSSLX509CertificateFactory$Parser .generateItem(OpenSSLX509CertificateFactory.java:9 4)
at org.conscrypt.OpenSSLX509CertificateFactory.engine GenerateCertificate(OpenSSLX509CertificateFactory. java:272)
at java.security.cert.CertificateFactory.generateCert ificate(CertificateFactory.java:339)
at com.android.signapk.SignApk.readPublicKey(SignApk. java:184)
at com.android.signapk.SignApk.main(SignApk.java:1007 )
Caused by: java.lang.IllegalArgumentException: Failed to load any of the given libraries: [conscrypt_openjdk_jni-osx-x86_64, conscrypt_openjdk_jni]
at org.conscrypt.NativeLibraryLoader.loadFirstAvailab le(NativeLibraryLoader.java:160)
at org.conscrypt.NativeCryptoJni.init(NativeCryptoJni .java:49)
at org.conscrypt.NativeCrypto.<clinit>(NativeCrypto.j ava:53)
... 9 more

Show Accepted Answer

Guest Quick Reply (No URL, BBcode or HTML)

Last post by kstoltenberg
3 hours ago
Last post by bernice.schinner
4 hours ago
Last post by qfay
4 hours ago
Last post by levi61
1 hour ago
Last post by ronaldo20
4 hours ago
Last post by weissnat.madelynn
1 hour ago
Last post by ernie26
4 hours ago
Last post by johnathan96
33 minutes ago
Last post by zkessler
1 hour ago
Last post by emelia.kris
4 hours ago