pk-xxx.pemをpkcs8に変換する。
https://forums.aws.amazon.com/thread.jspa?messageID=229522
pkcs8 -topk8 -in pk-XXXXXXXXXXXXXXXXXXX.pem -nocrypt > pk-XXXXXXXXXXXXXXXXXXX_pkcs8.pem
pk-xxx.pemをpkcs8に変換する。
https://forums.aws.amazon.com/thread.jspa?messageID=229522
pkcs8 -topk8 -in pk-XXXXXXXXXXXXXXXXXXX.pem -nocrypt > pk-XXXXXXXXXXXXXXXXXXX_pkcs8.pem