Nginx服务器和浏览器双向ssl/https加密证书的配置方法

最近的项目中需要安全性控制，而我又懒得改动后台的程序代码，故而想在反向代理层加入SSL证书验证。 一直在用Nginx做反向代理，但是其SSL的配置只用过普通的服务端单向证书。在Google，百度狂搜一通之后，一无所获，依旧是那老三样，只有单向认证的示例。浏览器端双向认证的配置好像从没人写过。

无奈之下，只好从OpenSSL的客户端证书开始学起，一点一点啃，大段大段的E文让我这半瓶子醋看的头晕眼晕。最后在

http://it.toolbox.com/blogs/securitymonkey/howto-securing-a-website-with-client-ssl-certificates-11500

的提示下终于把这个证书搞定，来秀一个。

这需要一下几个步骤：

1) 安装openssl用来做证书认证

2) 创建一个CA根证书

3) 创建一个自签名的服务器证书

4) 设置Nginx

5) 创建客户端证书

6) 安装客户端证书到浏览器

7) Profit.

1)

这一步我是在ubuntu下直接apt-get装的openssl, 配置文件安装在/etc/ssl/openssl.cnf

修改openssl.cnf的以下几段

[ ca ]

default_ca = foo

Openssl将会寻找名称为foo的配置段

[ foo ]

dir = /etc/ssl/private

database = $dir/index.txt

serial = $dir/serial

private_key = $dir/ca.key

certificate = $dir/ca.crt

default_days = 3650

default_md = md5

new_certs_dir = $dir

policy = policy_match

policy_match 我保持默认值没有改

[ policy_match ]

countryName = match

stateOrProvinceName = match

organizationName = match

organizationalUnitName = match

commonName = supplied

emailAddress = optional

默认签发有效期为10年，你可以自己设置一个合适的值

2)

创建一个新的CA根证书

下面的几个脚本我都放在/etc/ssl目录下

new_ca.sh:

#!/bin/sh

# Generate the key.

openssl genrsa -out private/ca.key

# Generate a certificate request.

openssl req -new -key private/ca.key -out private/ca.csr

# Self signing key is bad... this could work with a third party signed key... registeryfly has them on for $16 but I'm too cheap lazy to get one on a lark.

# I'm also not 100% sure if any old certificate will work or if you have to buy a special one that you can sign with. I could investigate further but since this

# service will never see the light of an unencrypted Internet see the cheap and lazy remark.

# So self sign our root key.

openssl x509 -req -days 3650 -in private/ca.csr -signkey private/ca.key -out private/ca.crt

# Setup the first serial number for our keys... can be any 4 digit hex string... not sure if there are broader bounds but everything I've seen uses 4 digits.

echo FACE > private/serial

# Create the CA's key database.

touch private/index.txt

# Create a Certificate Revocation list for removing 'user certificates.'

openssl ca -gencrl -out /etc/ssl/private/ca.crl -crldays 7

执行 sh new_ca.sh 生成新的CA证书

3)

生成服务器证书的脚本

new_server.sh:

# Create us a key. Don't bother putting a password on it since you will need it to start apache. If you have a better work around I'd love to hear it.

openssl genrsa -out private/server.key

# Take our key and create a Certificate Signing Request for it.

openssl req -new -key private/server.key -out private/server.csr

# Sign this bastard key with our bastard CA key.

openssl ca -in private/server.csr -cert private/ca.crt -keyfile private/ca.key -out private/server.crt

执行 sh new_server.sh 生成新服务器的证书

4)

最要命的一步，尝试多次后终于搞明白。

配置 nginx 的ssl支持

我的配置如下:

# HTTPS server

#

server {

listen   443;

server_name  localhost;

# 打开ssl

ssl  on;

# 上一步生成的服务器证书

ssl_certificate  /etc/ssl/private/server.crt;

# 服务器证书公钥

ssl_certificate_key  /etc/ssl/private/server.key;

# 客户端证书签名 也就是第二步生成的CA签名证书

ssl_client_certificate   /etc/ssl/private/ca.crt;

# ssl session 超时

ssl_session_timeout  5m;

# 打开SSL客户端校验 (双向证书检测)

ssl_verify_client on;

#ssl_protocols  SSLv2 SSLv3 TLSv1;

#ssl_ciphers  ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP;

ssl_prefer_server_ciphers   on;

location / {

root   /var/www/nginx-default;

index  index.html index.htm;

}

启动你的nginx ,等待客户连接

5)

现在来生成客户端证书

new_user.sh:

#!/bin/sh

# The base of where our SSL stuff lives.

base="/etc/ssl/private"

# Were we would like to store keys... in this case we take the username given to us and store everything there.

mkdir -p $base/users/$1/

# Let's create us a key for this user... yeah not sure why people want to use DES3 but at least let's make us a nice big key.

openssl genrsa -des3 -out $base/users/$1/$1.key 1024

# Create a Certificate Signing Request for said key.

openssl req -new -key $base/users/$1/$1.key -out $base/users/$1/$1.csr

# Sign the key with our CA's key and cert and create the user's certificate out of it.

openssl ca -in $base/users/$1/$1.csr -cert $base/ca.crt -keyfile $base/ca.key -out $base/users/$1/$1.crt

# This is the tricky bit... convert the certificate into a form that most browsers will understand PKCS12 to be specific.

# The export password is the password used for the browser to extract the bits it needs and insert the key into the user's keychain.

# Take the same precaution with the export password that would take with any other password based authentication scheme.

openssl pkcs12 -export -clcerts -in $base/users/$1/$1.crt -inkey $base/users/$1/$1.key -out $base/users/$1/$1.p12

执行 sh new_user.sh yourname 来生成一个 yourname 的client证书

按照提示一步一步来，这里要注意的是客户证书的几个项目要和根证书匹配

也就是第一步时配置的:

countryName = match

stateOrProvinceName = match

organizationName = match

organizationalUnitName = match

不一致的话无法生成最后的客户证书

6)

发送上一步生成的 yourname.p12 到客户端。

IE下双击安装就可以导入。

FireFox安装 :

Go into preferences.

Advanced.

View Certificates.

Import.

Enter master password for FireFox (if you don't have one set one here otherwise stolen laptop = easy access).

Enter in the export password given to you by the dude who created your cert.

Hit OK like a mad man.

打开网站会弹出对话框来要求你选择使用哪个证书，选择刚才安装的证书。选择接受服务器证书。现在你可以正常访问服务器拉。如果没弄对的话就会出现400 Bad request certification的错误

7)

没啥拉，有问题多试几次，其实都是很简单的事。就是中文的资料太少了。

:)

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