openssl pkcs8 -topk8 -in ec_prv.sec1.pem -passout pass:polar \
    -v1 PBE-SHA1-RC4-128 -outform der -out ec_prv.pk8.pw.der
openssl pkcs8 -topk8 -in ec_prv.sec1.pem -passout pass:polar \
    -v1 PBE-SHA1-RC4-128 -outform pem -out ec_prv.pk8.pw.pem