go get -u -v github.com/ikaiguang/go-allinpay

go run main.go

openssl genrsa -out rsa_private_key.pem 1024

openssl rsa -in rsa_private_key.pem -pubout -out rsa_public_key.pem

openssl pkcs12 -nocerts -nodes -in 20060400000044502.p12 -out 20060400000044502.pem

转换的时候，密码是：111111

openssl x509 -inform DER -in allinpay-pds.cer -out allinpay-pds.pem