#转换crt证书到pem
openssl x509 -in 1_abc.com_bundle.crt -out abc.com_cer.pem -outform PEM
#转换证书key到pem
openssl rsa -in 2_abc.com.key -out 2_abc.com_pri.pem
#查看证书内容
openssl x509 -in cert.pem -noout -text

参考文档:https://blog.csdn.net/strut/article/details/108171453