用 openssl 生成密钥的时候，终端里输出的点和加号代表什么

[sneezry]

[alect]

When computing DHPARAM you will get these as the output while computing Diffie Hellman parameters:

. : A potential prime number was generated.
+ : Number is being tested for primality.
* : A prime number was found.

引用自：
https://github.com/android/platform_external_openssl/blob/master/apps/dhparam.c
http://www.openssl.org/docs/apps/dhparam.html