1.准备好
aps_developer_identity.cer
, push.p12这两个证书文件
2. 生成证书如下：
openssl x509 -in aps_developer_identity.cer -inform der -out PushChatCert.pem
openssl pkcs12 -nocerts -out PushChatKey.pem -in Push.p12
Enter Import Password:
MAC verified OK
Enter PEM pass phrase:
Verifying – Enter PEM pass phrase:
把私钥和证书整合到一个.pem文件里：
$ cat PushChatCert.pem PushChatKey.pem > apns.pem
验证证书：
openssl s_client -connect gateway.sandbox.push.apple.com:2195
-cert PushChatCert.pem -key PushChatKey.pem
转自：http://blog.csdn.net/czh1986/article/details/8362434