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SSL:Secure Socket Layer TLS:Transport Layer Security
http协议 + ssl/tls协议。
用户在浏览器里输入一个https网址,然后连接到服务器的443端口
采用HTTPS协议的服务器必须要有一套数字证书,可以自己制作,也可以向组织申请。区别就是自己颁发的证书需要客户端验证通过,才可以继续访问,而使用受信任的公司申请的证书则不会弹出提示页面。这套证书其实就是一对公钥和私钥
证书里其实就是公钥,并且还包含了很多信息,如证书的颁发机构,过期时间等等
这部分工作是由客户端的TLS来完成的,首先会验证公钥是否有效,比如:颁发机构,过期时间等
等,如果发现异常,则会弹出一个警告框,提示证书存在问题。如果证书没有问题,那么就生成一
个随机值。然后用证书中公钥对该随机值进行非对称加密
这部分传送的是用证书加密后的随机值,目的就是让服务端得到这个随机值,以后客户端和服务端
的通信就可以通过这个随机值来进行加密解密了
服务端将客户端发送过来的加密信息用服务器私钥解密后,得到了客户端传过来的随机值
服务器将数据利用随机值进行对称加密,再发送给客户端
客户端用之前生成的随机值解密服务段传过来的数据,于是获取了解密后的内容
PKI:公共秘钥加密体系
CA:签证机构
RA:注册机构
CRL:证书吊销列表
证书存取库:
X.509:定义了证书的结构以及认证协议标准
须知:
当zhao要和qian通讯时:
在第2步中,客户端qian和zhao如何获取到CA1的公钥呢?
ROOTCA会给子CA1颁发证书:ROOTCA用自己的私钥【S根CA】给CA1的公钥【PCA1】签名加密【S根CA(PCA1)】。同时子CA1的证书也会由服务商部署在对应客户端(qian、zhao)上,这样客户端可以用ROOTCA公钥解密【S根CA(PCA1)】,拿到CA1的公钥【PCA1】。
当zhao要和sun通讯时,两者分属不同的CA,CA1和CA2同归ROOTCA管辖,子CA有ROOTCA颁发的证书,子CA的权威性由根CA证明,所以彼此互换证书可互信。
OpenSSL是一个开放源代码的软件库包,应用程序可以使用这个包来进行安全通信,避免窃听,同时确认另一端连线者的身份。
工具:openssl dgst
算法:md5sum, sha1sum, sha224sum,sha256sum
openssl passwd [options] [password]
常用选项:
-1:表示使用MD5加密算法
-5:表示使用SHA256加密算法
-6:表示使用SHA512加密算法,/etc/shadow使用该算法
-in:表示从文件中读取密码
-stdin:表示从标准输入读取密码
-salt:指定salt值,不使用随机产生的salt。在使用加密算法进行加密时,即使密码一样,salt不一样,所计算出来的hash值也不一样。除非密码一样,salt值也一样,计算出来的hash值才一样。
[root@centos8 ~]#echo wenzi | openssl passwd -6 -salt Y16DiwuVQtL6XCQK -stdin
$6$Y16DiwuVQtL6XCQK$MQEkn8e5iJ7haOIpJcO9cGkPS5c7gBG..7DxCVnr/9ozge2K5oAVpvoNDOWI0pBG7czyCMU4TaGmDo5W1H4c91
创建新用户同时指定密码,在CentOS8和Ubuntu都通用
[root@centos8 ~]#useradd -p `echo admin | openssl passwd -6 -salt abcdefghijk -stdin` liubei
查看
[root@centos8 ~]#getent shadow liubei
liubei:$6$abcdefghijk$heeR9m6lKuX0TKg/kyy.po/71nRAlKWIocZj5Jg7AylICvzBMi8ZSYZJoOJ1V4lxMu4bxxWWGmyG2DQUHJr.:19721:0:99999:7:::
openssl rand -base
生成随机10位长度密码
[root@centos8 ~]#openssl rand -base 9 | head -c 10
l0t440TrGA
[root@centos8 ~]#tr -dc '[[:alnum:]]' < /dev/urandom | head -c 10
a1YZyCEtkB
文档:man genrsa
生成私钥
(umask 077;openssl genrsa -out 私钥存储路径 2048)
[root@centos8 ~]#(umask 077;openssl genrsa -out /data/test1.key 2048)
Generating RSA private key, 2048 bit long modulus (2 primes)
...........................+++++
.+++++
e is 65537 (0x010001)
[root@centos8 ~]#cat /data/test1.key
-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----
解密加密的私钥
openssl rsa -in 原私钥路径 -out 新私钥路径
生成加密的私钥
[root@centos8 data]#openssl genrsa -out /data/test1.key -des3 1024
Generating RSA private key, 1024 bit long modulus (2 primes)
..........................................+++++
.........+++++
e is 65537 (0x010001)
Enter pass phrase for /data/test1.key:
Verifying - Enter pass phrase for /data/test1.key:
[root@centos8 data]#cat /data/test1.key
-----BEGIN RSA PRIVATE KEY-----
Proc-Type: 4,ENCRYPTED
DEK-Info: DES-EDE3-CBC,7FB3B71681AD9D1C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-----END RSA PRIVATE KEY-----
解密加密的私钥
[root@centos8 data]#openssl rsa -in /data/test1.key -out /data/test2.key
Enter pass phrase for /data/test1.key:
writing RSA key
[root@centos8 data]#ll /data/
total 8
-rw------- 1 root root 963 Dec 31 03:50 test1.key
-rw------- 1 root root 887 Dec 31 03:51 test2.key
[root@centos8 data]#cat test2.key
-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----
从私钥中提取公钥
openssl rsa -in 私钥路径 -pubout -out 公钥存储路径
[root@centos8 ~]#openssl rsa -in /data/test1.key -pubout -out /data/test1.key.pub
writing RSA key
[root@centos8 ~]#ll /data/
total 8
-rw------- 1 root root 1679 Dec 31 03:38 test1.key
-rw-r--r-- 1 root root 451 Dec 31 03:42 test1.key.pub
[root@centos8 ~]#cat /data/test1.key.pub
-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAqdmKz6zw6NNUnOxd00e5
qa3kTzzhvjylQvixBMd4IethRptVHddgmYcveFR6FbDwjEhoxyRNnAYWXX2J3pUy
q0qTN2r/Mk5k3PI9ucznbfH+gLz5SJJs19eRuTUniDYLObaRqA6KhhCOauiQinQ+
w+WlUpS97e9Rqy7EO/3m0IC4WhK8X0wpIlHnIAeGHDf9VOgWLP/PuzNeVkxk+7nS
cQVfNCQ5eh5qfuCDhjkotAtKIM3cSsKHuYbnR55RqGm5Z4fVk4AziiW8UgWBVm
jyMHL4SZfRDFBDo1qi0NrJMNVB1QSUdcfdljYewdRhCEUeL5dXhA2Jsn4CxxLVl6
1wIDAQAB
-----END PUBLIC KEY-----
openssl配置文件:/etc/pki/tls/openssl.cnf
其中重要项:
[ CA_default ]
dir = /etc/pki/CA CA的主要目录,用于存储证书、私钥、CRL等文件。
certs = $dir/certs 存储已颁发的证书
crl_dir = $dir/crl 存储已签名的证书撤销列表(CRL)
database = $dir/index.txt 数据库索引文件,存储证书对应哪个网站,吊销证书使用
#unique_subject = no # Set to 'no' to allow creation of
# several certs with same subject.
new_certs_dir = $dir/newcerts 新证书的默认存储位置
certificate = $dir/cacert.pem CA的证书文件
serial = $dir/serial 当前的序列号,用于标识新证书
#crlnumber = $dir/crlnumber # the current crl number
# must be commented out to leave a V1 CRL
crl = $dir/crl.pem 当前的CRL文件
private_key = $dir/private/cakey.pem CA的私钥文件
x509_extensions = usr_cert 要添加到证书的扩展
[ policy_match ] 匹配策略,用于定义证书主题字段的匹配规则
countryName = match
stateOrProvinceName = match
organizationName = match
organizationalUnitName = optional
commonName = supplied
emailAddress = optional
三种策略:
生成证书索引数据库文件
touch /etc/pki/CA/index.txt
指定第一个颁发证书的序列号
echo 01 > /etc/pki/CA/serial
cd /etc/pki/CA;(umask 066; openssl genrsa -out private/cakey.pem 2048)
openssl req -new -x509 -key /etc/pki/CA/private/cakey.pem -days 3650 -out /etc/pki/CA/cacert.pem
选项说明:
-new:生成新证书签署请求
-x509:专用于CA生成自签证书
-key:签名用到的私钥文件
-days n:证书的有效期限
-out /PATH/TO/SOMECERTFILE: 证书的保存路径
CentOS7
从CentOS7将/etc/pki/CA目录内容复制到CentOS8,免去建立目录的步骤
[root@wenzi ~]#tree -d /etc/pki/CA
/etc/pki/CA
├── certs
├── crl
├── newcerts
└── private
[root@wenzi ~]#scp -r /etc/pki/CA root@192.168.28.10:/etc/pki/
CentOS8
生成CA私钥
[root@centos8 ~]#cd /etc/pki/CA;(umask 066; openssl genrsa -out private/cakey.pem 2048)
Generating RSA private key, 2048 bit long modulus (2 primes)
.......................................................................................................+++++
........................................................................................................................................................................................+++++
e is 65537 (0x010001)
[root@centos8 CA]#ll private/cakey.pem
-rw------- 1 root root 1675 Dec 31 04:42 private/cakey.pem
生成CA自签名证书
[root@centos8 CA]#openssl req -new -x509 -key /etc/pki/CA/private/cakey.pem -days 3650 -out /etc/pki/CA/cacert.pem
You are about to be asked to enter information that will be incorporated
into your certificate request.
What you are about to enter is what is called a Distinguished Name or a DN.
There are quite a few fields but you can leave some blank
For some fields there will be a default value,
If you enter '.', the field will be left blank.
-----
Country Name (2 letter code) [XX]:CN 国家
State or Province Name (full name) []:henan 省份
Locality Name (eg, city) [Default City]:zhengzhou 市名
Organization Name (eg, company) [Default Company Ltd]:wenzi 公司
Organizational Unit Name (eg, section) []:yunwei 部门
Common Name (eg, your name or your server's hostname) []:www.wenzi.com 使用证书的网站域名
Email Address []:999@qq.com 邮箱
查看生成的CA自签证书,建议将此文件传输到windows系统,后缀改为.crt
[root@centos8 CA]#openssl x509 -in cacert.pem -noout -text
Certificate:
Data:
Version: 3 (0x2)
Serial Number:
52:27:46:0b:52:67:5f:60:c8:bf:38:25:b9:c7:0e:66:d4:52:95:6a
Signature Algorithm: sha256WithRSAEncryption
Issuer: C = CN, ST = henan, L = zhengzhou, O = wenzi, OU = yunwei, CN = www.wenzi.com, emailAddress = 999@qq.com
Validity
Not Before: Dec 30 20:50:35 2023 GMT
Not After : Dec 27 20:50:35 2033 GMT
Subject: C = CN, ST = henan, L = zhengzhou, O = wenzi, OU = yunwei, CN = www.wenzi.com, emailAddress = 999@qq.com
Subject Public Key Info:
Public Key Algorithm: rsaEncryption
RSA Public-Key: (2048 bit)
Modulus:
00:bc:ac:9d:47:2c:4c:83:a6:2c:12:52:ba:f7:93:
6b:33:a6:e1:f0:9b:e7:4c:51:59:b0:95:db:b2:68:
ec:4a:2c:36:57:73:72:11:3c:21:6e:d3:fb:5a:0f:
a4:ca:05:21:fd:d5:a6:d7:4d:1f:72:91:15:3e:60:
da:cf:3a:e3:b2:c6:7b:c3:0e:4e:39:14:2c:94:f1:
ae:47:30::27:95:76:84:12:2e:a2:e0:60:2f:7c:
c9:83:3b:c9:d9:6a:4d:1f:78:a6:41:ea:ac:12:85:
d3:9a:43:f9:24:c7:66:f0:09:c7:01:91:ee:6a:ec:
1d:a4:7f:72:19:43:ca:91:78:ac:23:9e:6b:43:84:
5e:40:09:61:5e:b6:32:f2:19:9d:c6:b7:00:f8:d0:
00:fd:66:f3:f7:a2:a3:5a:81:71:1a:b0:2a:c2:e7:
42:f8:a9:b7:54:f6:1e:da:47:87:4a:6a:29:26:7f:
16:20:b9:e9:76:a7:92:b2:19:3a:4e:de:b0:ab:63:
12:6e:7a:f3::e5:91:93:1f:35:09:0b:b6:79:dd:
a3:27:8d:7a:2d:9a:3b:7f:a1:b1:d3:df:a2:0a:81:
60:0e:ec:69:9b:1a:a7:32:19:71:fa:9a:f1:93:91:
e7:48:8f:be:2a:85:a4:6d:f7:90:92:92:d7:08:06:
94:65
Exponent: 65537 (0x10001)
X509v3 extensions:
X509v3 Subject Key Identifier:
5D:EE:41:48:03:D1:0D:A6:85:DA:BC:05:29:AF:81:BF:82:67:11:05
X509v3 Authority Key Identifier:
keyid:5D:EE:41:48:03:D1:0D:A6:85:DA:BC:05:29:AF:81:BF:82:67:11:05
X509v3 Basic Constraints: critical
CA:TRUE
Signature Algorithm: sha256WithRSAEncryption
5d:65:b2:c9:2d:8c::79:85:46:12:0a:17:12:87:21:3f:e1:
f3:bb:f5:c4:82:24:b9:43:74:c2:d6:52:5c:80:65:75:9d:3c:
45:fa:c4:88:5f:43:6d:1d:0e:3d:84:a0:e7:ab:60:35:f6:88:
c0:ac:8e:c7:ca:70:f7:71:09:ea:03:6f:3a:c7:2f:4e:bd:3b:
35:4c:ca:4e:ce:17:90:67:5a:8f:4b:8a:ef:3d:ce:3a:bc:9c:
ee:2a:cf:7d:3a:f0:36:9b:f7:19:71:73:f5:e7:4d:30:50:8c:
12:f8:f1:92:02:91:f7:3b:30:ce:07:4e:09:b9:f6:0f:72:92:
4d:76:c4:11:6c:a9:e3:56:ca:2f:fc:9e:05:b5:dd:e4:86:45:
6a:dd:c4:77:70:3e:bc:4a:5f:55:6e:eb:74:7d:46:4f:00:c4:
db:23:bc:d3:71:74:ef:e0:e4:06:27:8a:29:b6:e0:62:b3:04:
7e:fe:51:71:91:04:52:f4:61:12:55:37:48:8e:63:6a:50:05:
a3:e2:15:8f:cf:e5:d1:5b:d1:9c:bc:33:b1:88:6e:1b:21::
5b:3c:3f:34:0a:a3:b2:95:29:cf:8b:b6:fa:b9:47:28:17:56:
### 给大家的福利
**零基础入门**
对于从来没有接触过网络安全的同学,我们帮你准备了详细的学习成长路线图。可以说是最科学最系统的学习路线,大家跟着这个大的方向学习准没问题。

同时每个成长路线对应的板块都有配套的视频提供:

因篇幅有限,仅展示部分资料
网络安全面试题

绿盟护网行动

还有大家最喜欢的黑客技术

**网络安全源码合集+工具包**


**所有资料共282G**,朋友们如果有需要全套《网络安全入门+黑客进阶学习资源包》,可以扫描下方二维码领取(如遇扫码问题,可以在评论区留言领取哦)~
**网上学习资料一大堆,但如果学到的知识不成体系,遇到问题时只是浅尝辄止,不再深入研究,那么很难做到真正的技术提升。**
**需要这份系统化的资料的朋友,可以添加V获取:vip204888 (备注网络安全)**

**一个人可以走的很快,但一群人才能走的更远!不论你是正从事IT行业的老鸟或是对IT行业感兴趣的新人,都欢迎加入我们的的圈子(技术交流、学习资源、职场吐槽、大厂内推、面试辅导),让我们一起学习成长!**
还有大家最喜欢的黑客技术

**网络安全源码合集+工具包**


**所有资料共282G**,朋友们如果有需要全套《网络安全入门+黑客进阶学习资源包》,可以扫描下方二维码领取(如遇扫码问题,可以在评论区留言领取哦)~
**网上学习资料一大堆,但如果学到的知识不成体系,遇到问题时只是浅尝辄止,不再深入研究,那么很难做到真正的技术提升。**
**需要这份系统化的资料的朋友,可以添加V获取:vip204888 (备注网络安全)**
[外链图片转存中...(img-n81x0xA9-1713304447818)]
**一个人可以走的很快,但一群人才能走的更远!不论你是正从事IT行业的老鸟或是对IT行业感兴趣的新人,都欢迎加入我们的的圈子(技术交流、学习资源、职场吐槽、大厂内推、面试辅导),让我们一起学习成长!**
因篇幅问题不能全部显示,请点此查看更多更全内容