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linux openssl是什么

在linux中，openssl是一个功能极其强大的命令行工具，可以用来完成公钥体系及HTTPS相关的很多任务。openssl有两种运行模式：交互模式和批处理模式；直接输入openssl回车进入交互模式，输入带命令选项的openssl进入批处理模式。

linux openssl是什么

本教程操作环境：linux7.3系统、Dell G3电脑。

一、openssl命令简介

  openssl是一个功能极其强大的命令行工具，可以用来完成公钥体系（Public Key Infrastructure）及HTTPS相关的很多任务。openssl是一个强大的安全套接字层密码库，囊括主要的密码算法、常用的密钥和证书封装管理功能及SSL协议，并提供丰富的应用程序供测试或其它目的使用。
  openssl有两种运行模式：交互模式和批处理模式。直接输入openssl回车进入交互模式，输入带命令选项的openssl进入批处理模式。
  openssl整个软件包大概可以分成三个主要的功能部分：密码算法库、SSL协议库以及应用程序。openssl的目录结构自然也是围绕这三个功能部分进行规划的。 openssl命令的作用：

  • 私钥、公钥和参数的创建和管理
  • 公开密钥加密操作
  • 创建X.509证书、CSR和CRL
  • 信息摘要的计算
  • 使用密码进行加密和解密
  • SSL/TLS客户端和服务器测试
  • 处理S/MIME签名或加密邮件
  • 时间戳请求、生成和验证

二、使用示例

1、交互模式下获取命令帮助

OpenSSL> help
 Standard commands
 asn1parse ca ciphers cms
 crl crl2pkcs7 dgst dhparam
 dsa dsaparam ec ecparam
 enc engine errstr gendsa
 genpkey genrsa help list
 nseq ocsp passwd pkcs12
 pkcs7 pkcs8 pkey pkeyparam
 pkeyutl prime rand rehash
 req rsa rsautl s_client
 s_server s_time sess_id smime
 speed spkac srp storeutl
 ts verify version x509
 Message Digest commands (see the `dgst’ command for more details)
 blake2b512 blake2s256 gost md4
 md5 mdc2 rmd160 sha1
 sha224 sha256 sha3-224 sha3-256
 sha3-384 sha3-512 sha384 sha512
 sha512-224 sha512-256 shake128 shake256
 sm3
 Cipher commands (see the `enc’ command for more details)
 aes-128-cbc aes-128-ecb aes-192-cbc aes-192-ecb
 aes-256-cbc aes-256-ecb aria-128-cbc aria-128-cfb
 aria-128-cfb1 aria-128-cfb8 aria-128-ctr aria-128-ecb
 aria-128-ofb aria-192-cbc aria-192-cfb aria-192-cfb1
 aria-192-cfb8 aria-192-ctr aria-192-ecb aria-192-ofb
 aria-256-cbc aria-256-cfb aria-256-cfb1 aria-256-cfb8
 aria-256-ctr aria-256-ecb aria-256-ofb base64
 bf bf-cbc bf-cfb bf-ecb
 bf-ofb camellia-128-cbc camellia-128-ecb camellia-192-cbc
 camellia-192-ecb camellia-256-cbc camellia-256-ecb cast
 cast-cbc cast5-cbc cast5-cfb cast5-ecb
 cast5-ofb des des-cbc des-cfb
 des-ecb des-ede des-ede-cbc des-ede-cfb
 des-ede-ofb des-ede3 des-ede3-cbc des-ede3-cfb
 des-ede3-ofb des-ofb des3 desx
 idea idea-cbc idea-cfb idea-ecb
 idea-ofb rc2 rc2-40-cbc rc2-64-cbc
 rc2-cbc rc2-cfb rc2-ecb rc2-ofb
 rc4 rc4-40 seed seed-cbc
 seed-cfb seed-ecb seed-ofb sm4-cbc
 sm4-cfb sm4-ctr sm4-ecb sm4-ofb

2、查看命令版本

OpenSSL> version
 OpenSSL 1.1.1h 22 Sep 2020

3、利用openssl命令进行base64编码和解码

  • base64编码
(base) [root@sun-site certs]# echo “wuhs” |openssl base64
 d3Vocwo=
 (base) [root@sun-site certs]# echo “wuhs” > 1.txt
 (base) [root@sun-site certs]# openssl base64 -in 1.txt
 d3Vocwo=
  • base64解码
(base) [root@sun-site certs]# echo “d3Vocwo=” | openssl base64 -d
 wuhs
 (base) [root@sun-site certs]# openssl base64 -d -in 1.base64
 wuhs

4、利用openssl生成随机密码

  • 生成12位的随机密码
(base) [root@sun-site certs]# openssl rand -base64 10 |cut -c 1-12
 PGznlV5Og0Us

5、利用openssl命令生成摘要

  • 对字符串“wuhs”进行md5摘要计算
(base) [root@sun-site certs]# echo wuhs | openssl md5
 (stdin)= 4cdb1fbd6a34ff27dc8c10913fab3e7e
 (base) [root@sun-site certs]# openssl md5 1.txt
 MD5(1.txt)= 4cdb1fbd6a34ff27dc8c10913fab3e7e
  • 对字符串“wuhs”进行sha1摘要计算
(base) [root@sun-site certs]# openssl sha1 1.txt
 SHA1(1.txt)= bd8f0b20de17d623608218d05e8741502cf42302
 (base) [root@sun-site certs]# echo wuhs | openssl sha1
 (stdin)= bd8f0b20de17d623608218d05e8741502cf42302

6、利用openssl命令进行AES加密解密

  • 对字符串“wuhs”进行aes加密，使用密钥123，输出结果以base64编码格式给出
(base) [root@sun-site certs]# openssl aes-128-cbc -in 1.txt -k 123 -base64
 *** WARNING : deprecated key derivation used.
 Using -iter or -pbkdf2 would be better.
 U2FsdGVkX194Z8P5c7C8vmXbA39omlqU/ET8xaehVFk=
  • 将aes加密文件数据进行解密，密钥123
(base) [root@sun-site certs]# openssl aes-128-cbc -d -k 123 -base64 -in 2.txt
 *** WARNING : deprecated key derivation used.
 Using -iter or -pbkdf2 would be better.
 wuhs

7、密钥生成与验证

  • 创建加密的私钥
(base) [root@sun-site tmp]# openssl genrsa -des3 -out sunsite.key 2048
 Generating RSA private key, 2048 bit long modulus (2 primes)
 …+++++
 …+++++
 e is 65537 (0x010001)
 Enter pass phrase for sunsite.key:
 Verifying - Enter pass phrase for sunsite.key:
 (base) [root@sun-site tmp]# ll
 total 16
 -rw------- 1 root root 1751 Oct 25 14:43 sunsite.key
  • 验证私钥
(base) [root@sun-site tmp]# openssl rsa -check -in sunsite.key
 Enter pass phrase for sunsite.key:
 RSA key ok
 writing RSA key
 -----BEGIN RSA PRIVATE KEY-----
 MIIEpAIBAAKCAQEA1jDreCAjX5kpNmnyNayQB/GUvyIRvZZM2WoKAIjne91JupgP
 OKmBdYSWeWsf0h0XU9ubhCHpgCss2hdRKxLN3rJLlFD98TUKpb9S2XkfrT9s3cLN
 PQyCELK60zrs1sE52I4pDj4nTZPZCL9mykzqwNa5rcGuHN/lLnvJxFPJOJwVWbVE
 Bvh+jGioJbi+Ar0rs37/8naGBYz5k4BFn5sCKrhssoMEpDWjMz4yJMpycTlEFITa
 …
  • 加密私钥，输入密码后私钥文件完成加密
(base) [root@sun-site tmp]# openssl rsa -des3 -in sunsite.key -out sunsite.key
 writing RSA key
 Enter PEM pass phrase:
 Verifying - Enter PEM pass phrase:
  • 解密私钥，输入密码后私钥文件被解密
(base) [root@sun-site tmp]# openssl rsa -in sunsite.key -out sunsite2.key
 Enter pass phrase for sunsite.key:
 writing RSA key

8、生成证书签名

  • 使用指定私钥文件生产csr文件
(base) [root@sun-site tmp]# openssl req \
 -key sunsite.key \
 -new -out sunsite.csr
 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) [AU]:CN
 State or Province Name (full name) [Some-State]:HuNan
 Locality Name (eg, city) []:changsha
 Organization Name (eg, company) [Internet Widgits Pty Ltd]:sunsite
 Organizational Unit Name (eg, section) []:jsb
 Common Name (e.g. server FQDN or YOUR name) []:wuhs
 Email Address []:524627027@qq.com
 Please enter the following ‘extra’ attributes
 to be sent with your certificate request
 A challenge password []:123456
 An optional company name []:123456
  • 生成私钥和CSR
(base) [root@sun-site tmp]# openssl req \
 -newkey rsa:2048 -nodes -keyout s.key \
 -out s.csr
 Generating a RSA private key
 …+++++
 .+++++
 writing new private key to ‘s.key’
 -----
 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) [AU]:cn
 State or Province Name (full name) [Some-State]:hunan
 Locality Name (eg, city) []:changsha
 Organization Name (eg, company) [Internet Widgits Pty Ltd]:sunsite
 Organizational Unit Name (eg, section) []:jsb
 Common Name (e.g. server FQDN or YOUR name) []:wuhs
 Email Address []:524627027@qq.com
 Please enter the following ‘extra’ attributes
 to be sent with your certificate request
 A challenge password []:123456
 An optional company name []:123456
 (base) [root@sun-site tmp]# ll
 total 28
 -rw-r–r-- 1 root root 1102 Oct 25 15:37 s.csr
 -rw------- 1 root root 1708 Oct 25 15:37 s.key
  • 使用已有的证书和私钥生成CSR
openssl x509 \
 -in domain.crt \
 -signkey domain.key 
 -x509toreq -out domain.csr
  • 查看CSR文件
(base) [root@sun-site tmp]# openssl req -text -noout -verify -in sunsite.csr

1.png

9、制作和查看SSL证书

  • 生成自签名证书
(base) [root@sun-site tmp]# openssl req \
 -newkey rsa:2048 -nodes -keyout sunsite.key \
 -x509 -days 365 -out sunsite.crt
 Generating a RSA private key
 …+++++
 …+++++
 writing new private key to ‘sunsite.key’
 -----
 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) [AU]:cn
 State or Province Name (full name) [Some-State]:hn
 Locality Name (eg, city) []:cs
 Organization Name (eg, company) [Internet Widgits Pty Ltd]:sunsite
 Organizational Unit Name (eg, section) []:jsb
 Common Name (e.g. server FQDN or YOUR name) []:wuhs
 Email Address []:524627027@qq.com
 (base) [root@sun-site tmp]# ll
 -rw-r–r-- 1 root root 1383 Oct 25 16:03 sunsite.crt
 -rw-r–r-- 1 root root 1102 Oct 25 15:05 sunsite.csr
 -rw------- 1 root root 1708 Oct 25 16:03 sunsite.key
  • 使用已有私钥生成自签名证书
(base) [root@sun-site tmp]# openssl req \
 -key sunsite.key -new \
 -x509 -days 365 -out sunsite.crt
 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) [AU]:cn
 State or Province Name (full name) [Some-State]:hn
 Locality Name (eg, city) []:cs
 Organization Name (eg, company) [Internet Widgits Pty Ltd]:sunsite
 Organizational Unit Name (eg, section) []:jsb
 Common Name (e.g. server FQDN or YOUR name) []:wuhs
 Email Address []:wuhs@qq.com
  • 使用已有的私钥和CSR生成自签名证书
(base) [root@sun-site tmp]# openssl x509 \
 -signkey sunsite.key \
 -in sunsite.csr \
 -req -days 365 -out sunsite.crt
 Signature ok
 subject=C = CN, ST = HuNan, L = changsha, O = sunsite, OU = jsb, CN = wuhs, emailAddress = 524627027@qq.com
 Getting Private key
  • 查看证书

(base) [root@sun-site tmp]# openssl x509 -text -noout -in sunsite.crt

2.png

  • 验证证书是否由ca颁发
(base) [root@sun-site tmp]# openssl verify -verbose -CAfile ca.crt sunsite.crt
 Error loading file ca.crt
 #需要ca证书
  • 验证私钥、证书、CSR是否匹配
(base) [root@sun-site tmp]# openssl x509 -noout -modulus -in sunsite.crt |openssl md5
 (stdin)= e26905e973af69aed4e4d707f882de61
 (base) [root@sun-site tmp]# openssl rsa -noout -modulus -in sunsite.key |openssl md5
 (stdin)= e26905e973af69aed4e4d707f882de61
 (base) [root@sun-site tmp]# openssl req -noout -modulus -in sunsite.csr |openssl md5
 (stdin)= e26905e973af69aed4e4d707f882de61
 #md5校验和一致说明，三者匹配

10、证书格式转换

  • PEM转DER
(base) [root@sun-site tmp]# openssl x509 -in sunsite.crt -outform der -out sunsite.der
  • DER转PEM
(base) [root@sun-site tmp]# openssl x509 -in sunsite.der -inform der -out sunsite.crt
  • PEM转PKCS7
(base) [root@sun-site tmp]# openssl crl2pkcs7 -nocrl -certfile sunsite.crt -certfile ca-chain.crt -out sunsite.p7b
  • PKCS7转换为PEM
#openssl pkcs7 -in domain.p7b -print_certs -out domain.crt
  • PEM转换为PKCS12
openssl pkcs12 -inkey domain.key -in domain.crt -export -out domain.pfx
  • PKCS12转换为PEM
openssl pkcs12 -in domain.pfx -nodes -out domain.combined.crt

11、证书吊销

  • 客户端获取要吊销证书的serial（在使用证书的主机执行）
(base) [root@sun-site tmp]# openssl x509 -in sunsite.crt -noout -serial -subject
 serial=2DA086B4B14ECE63535734049A4BCF70290446C9
 subject=C = CN, ST = HuNan, L = changsha, O = sunsite, OU = jsb, CN = wuhs, emailAddress = 524627027@qq.com

12、获取命令帮助

  • 以openssl x509命令为例

(base) [root@sun-site tmp]# openssl x509 --help

3.png

三、使用语法及命令介绍

1、使用语法

openssl command [ command_opts ] [ command_args ]

2、标准命令

命令命令介绍
asn1parse解析ASN.1序列。
ca证书颁发机构（ca）管理。
ciphers密码套件描述确定。
cmscms（加密消息语法）实用程序
crl证书撤销列表（crl）管理。
crl2pkcs7CRL到PKCS#7的转换。
dgst消息摘要计算。
dhDiffie-Hellman参数管理。被dhparam淘汰。
dhparamDiffie-Hellman参数的生成和管理。由genpkey和pkeyparam取代
dsadsa数据管理。
dsaparamDSA参数生成和管理。由genpkey和pkeyparam取代
ecec（椭圆曲线）密钥处理
ecparamEC参数操作和生成
enc使用密码进行编码。
engine引擎（可加载模块）信息和操作。
errstr错误编号到错误字符串的转换。
gendhDiffie-Hellman参数的生成。被dhparam淘汰。
gendsa根据参数生成DSA私钥。由genpkey和pkey取代
genpkey生成私钥或参数。
genrsa生成RSA私钥。由根普基取代。
nseq创建或检查netscape证书序列
ocsp在线证书状态协议实用程序。
passwd生成哈希密码。
pkcs12PKCS#12数据管理。
pkcs7PKCS#7数据管理。
pkey公钥和私钥管理。
pkeyparam公钥算法参数管理。
pkeyutl公钥算法加密操作实用程序。
rand生成伪随机字节。
reqPKCS#10 X.509证书签名请求（CSR）管理。
rsarsa密钥管理。
rsautlRSA实用程序，用于签名、验证、加密和解密。被pkeyutl取代
s_client这实现了一个通用的SSL/TLS客户端，它可以与使用SSL/TLS的远程服务器建立透明连接。它仅用于测试目的，只提供基本的接口功能，但在内部主要使用OpenSSL库的所有功能。
s_server
s_timeSSL连接计时器。
sess_idSSL会话数据管理。
smimeS/MIME邮件处理。
speed算法速度测量。
spkacspkac打印和生成实用程序
ts时间戳授权工具（客户端/服务器）
verifyX.509证书验证。
versionOpenSSL版本信息。
x509X.509证书数据管理。

3、消息摘要命令

命令命令介绍
md2MD2 Digest
md5MD5 Digest
mdc2MDC2 Digest
rmd160RMD-160 Digest
shaSHA Digest
sha1SHA-1 Digest
sha224SHA-224 Digest
sha256SHA-256 Digest
sha384SHA-384 Digest
sha512SHA-512 Digest

4、编码和密码命令

命令命令介绍
base64base64编码
bf bf-cbc bf-cfb bf-ecb bf-ofb河豚密码
cast cast-cbc强制转换密码
cast5-cbc cast5-cfb cast5-ecb cast5-ofbCAST5 密码
des des-cbc des-cfb des-ecb des-ede des-ede-cbc des-ede-cfb des-ede-ofb des-ofbDES 密码
des3 desx des-ede3 des-ede3-cbc des-ede3-cfb des-ede3-ofb三重DES密码
idea idea-cbc idea-cfb idea-ecb idea-ofbIDEA 密码
rc2 rc2-cbc rc2-cfb rc2-ecb rc2-ofbRC2 密码
rc4RC4 密码
rc5 rc5-cbc rc5-cfb rc5-ecb rc5-ofbRC5 密码

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