openssl 創建私有CA
創建私有CA:
openssl的配置文件:/etc/pki/tls/openssl.cnf
1.創建所需要的文件
#touch index.txt
#echo 01 > serial
#
2.給CA發證 <CA自簽證書>
#(umask 077; openssl genrsa -out private/cakey.pem 2048)
# openssl req -new -x509 -key /etc/pki/CA/private/cakey.pem -days 7300 -out /etc/pki/CA/cacert.pem
關於req後面的幾個常用選項:
-new: 生成新證書簽署請求;
-x509: 專用於CA生成自簽證書;
-key: 生成請求時用到的私鑰文件;
-days n: 證書的有效期限;
-out /PATH/TO/SOMECERTFILE : 證書的保存路徑;
3.發證
1.用到證書的主機生成證書請求;
# (umask 077; openssl genrsa -out /etc/httpd/ssl/httpd.key 2048)
# openssl req -new -key /etc/httpd/ssl/httpd.key -days 365 -out /etc/httpd/ssl/httpd.csr
2.把請求文件傳輸給CA;
3.CA簽署證書,並將證書發還給請求者;
#openssl ca -in /tmp/httpd.csr -out /etc/pki/CA/certs/httpd.crt -days 365
查看證書中的信息
openssl x509 -in /PATH/FROM/CERT_FILE -noout -text|subject|serial
4.吊銷證書
1.客戶端獲取要吊銷的證書的序列號serial
openssl x509 -in /path/from/cert_file -noout -subject
2.CA端
吊銷證書
openssl ca -revoke /etc/pki/CA/newcerts/SERIAL.pem
3.生成吊銷證書編號(第一次吊銷一個證書)
echo 01 > /etc/pki/CA/crlnumber
4.更新證書吊銷列表
openssl ca -gencrl -out thisca.crl
查看crl文件:
openssl crl -in /path/from/crl_file.crl -noout -text
openssl 創建私有CA