nginx 部署国密证书

nginx部署一般的RSA和ECC证书都是正常，测试国密证书的时候报ee key太小
配置表：nginx version: nginx/1.16.1
built by gcc 4.8.5 20150623 (Red Hat 4.8.5-36) (GCC)
built with OpenSSL 1.1.0f 25 May 2017

conf
worker_processes 1;
events {
worker_connections 1024;
}


http {
include mime.types;
default_type application/octet-stream;
sendfile on;
keepalive_timeout 65;
server {
listen 80;
server_name localhost;
location / {
root html;
index index.html index.htm;
}
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root html;
}
server {
listen 443 ssl;
server_name www.ssldemo.cn;

ssl_certificate /usr/local/nginx/cert/encrypt.crt;
ssl_certificate_key /usr/local/nginx/cert/encrypt.key;

ssl_session_cache shared:SSL:1m;
ssl_session_timeout 5m;

ssl_ciphers HIGH:!aNULL:!MD5;
ssl_prefer_server_ciphers on;

location / {
root html;
index index.html index.htm;
}
}

}


以上是配置文件
报错信息
[root@localhost conf]# nginx -t
nginx: [emerg] SSL_CTX_use_certificate("/usr/local/nginx/cert/encrypt.crt") failed (SSL: error:100D7010:elliptic curve routines:eckey_pub_decode:EC lib error:0B09407D:x509 certificate routines:x509_pubkey_decode:public key decode error error:140AB18F:SSL routines:SSL_CTX_use_certificate:ee key too small)
nginx: configuration file /usr/local/nginx//conf/nginx.conf test failed