Linux下Oenssl命令及搭建私有CA
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篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了Linux下Oenssl命令及搭建私有CA相关的知识，希望对你有一定的参考价值。
一、Openssl常用命令：
# openssl ? # 查看openssl的命令及子命令 # man enc # 可以直接查看子命令帮助
加密：
# openssl enc -des3 -e -salt -in /lee/sh/test.sh -out /lee/sh/test.sh.des3 -des3:指定加密算法，可以在openssl ？中查看支持的加密算法 -e：加密，缺省参数 -salt：加盐 -in：输入文件，也就是要加密的文件 -out：输出文件，也就是加密后的密文 enter des-ede3-cbc encryption password: # 输入加密密码 Verifying - enter des-ede3-cbc encryption password: #确认输入加密密码
解密：
# openssl enc -des3 -d -salt -in /lee/sh/test.sh.des3 -out /lee/sh/test1.sh -d：解密 enter des-ede3-cbc decryption password:
散列：
# md5sum /lee/sh/test.sh # 用MD5散列 590c2fdc61a76337dd2e1df91a217a27 /lee/sh/test.sh # sha1sum /lee/sh/test.sh # SHA1散列 40554fd040b5a54821280603a67e5c07818aff65 /lee/sh/test.sh # openssl dgst -sha1 /lee/sh/test.sh # 用openssl命令进行SHA1散列 SHA1(/lee/sh/test.sh)= 40554fd040b5a54821280603a67e5c07818aff65 # openssl dgst -md5 /lee/sh/test.sh # 用openssl命令进行MD5散列 MD5(/lee/sh/test.sh)= 590c2fdc61a76337dd2e1df91a217a27 # openssl dgst -? # 这样可以输出支持的命令 unknown option '-?' options are -c to output the digest with separating colons -r to output the digest in coreutils format -d to output debug info -hex output as hex dump -binary output in binary form -hmac arg set the HMAC key to arg -non-fips-allow allow use of non FIPS digest -sign file sign digest using private key in file -verify file verify a signature using public key in file -prverify file verify a signature using private key in file -keyform arg key file format (PEM or ENGINE) -out filename output to filename rather than stdout -signature file signature to verify -sigopt nm:v signature parameter -hmac key create hashed MAC with key -mac algorithm create MAC (not neccessarily HMAC) -macopt nm:v MAC algorithm parameters or key -engine e use engine e, possibly a hardware device. -md4 to use the md4 message digest algorithm -md5 to use the md5 message digest algorithm -ripemd160 to use the ripemd160 message digest algorithm -sha to use the sha message digest algorithm -sha1 to use the sha1 message digest algorithm -sha224 to use the sha224 message digest algorithm -sha256 to use the sha256 message digest algorithm -sha384 to use the sha384 message digest algorithm -sha512 to use the sha512 message digest algorithm -whirlpool to use the whirlpool message digest algorithm
生成密码串（散列值）：
# openssl passwd -? # 详细帮助还是查看man Usage: passwd [options] [passwords] where options are -crypt standard Unix password algorithm (default) -1 MD5-based password algorithm # MD5算法 -apr1 MD5-based password algorithm, Apache variant -salt string use provided salt -in file read passwords from file -stdin read passwords from stdin -noverify never verify when reading password from terminal -quiet no warnings -table format output as table -reverse switch table columns
但是，passwd本身是一个操作系统命令，用man查看的是操作系统那个passwd的帮助，于是whatis一下：
# whatis passwd sslpasswd (1ssl) - compute password hashes # 可以看出是sslpasswd passwd (1) - update user's authentication tokens passwd (5) - password file # man sslpasswd # 这样就可以查看了 # openssl passwd -1 # 使用MD5算法计算密码的（字符串）的散列值 Password: Verifying - Password: $1$VAehBGE.$vSHYjZqz4O3xLXgqaWTL70
注意：这个命令时默认加盐的，所以多次执行同一个密码串所得到的结果都会不同
# openssl passwd -1 -salt VAehBGE. # 指定salt值 Password: $1$VAehBGE.$vSHYjZqz4O3xLXgqaWTL70 # 相同的salt结果输出一样了
生成非对称密钥：
# openssl genrsa # 生成RSA私钥 Generating RSA private key, 2048 bit long modulus ...........+++ ........................+++ e is 65537 (0x10001) -----BEGIN RSA PRIVATE KEY----- MIIEpQIBAAKCAQEA9armbPLhXtJc70Ktvw0JJEZtWaA6MtWGjL6sr51WGhrC2wcu XVdrQlpWXWxFjO7zlwfIs2Oo9+6LmQdmRbqlt0Jmh0RG9XxB51cKR1s8c71k/u2A Jm6Ccg8wsxLgBVKrpFB9bZ7WsLAJ7n61mkJul49Vp/uIuGX+3HEgmgoOWObw6xiC tMSR9c5ksobz3oI6R9ccwpOfcXBWUzVo2fc+KnuKyM1saR8HXrHBPpoyP6DT2GOv CyLjw1l1c4jPKO6PC2CJMyM4q6EuTow/j8y+X2vCVPzferYRixH8b96HGisxqD2f UxK1H3RPOCk8L/NiWyE2L5950FgDxUB1gRXANwIDAQABAoIBABg0S1mmoG/QOBnW rvmo1iK90Z5H/BPwF76cNrViwg32XwZncbj+mPHDpsizlzKohFV4Dd0mz4oF9bkR EpGCLzucDi/7mSYspO2fFMMtCQq6OU4opjyjHLUSLBEopevAVmrtBz6arLphzciy sT/OlcjW9XCEhtbsLa0YdEbZAMrfXKdpR88CX8zIKn5ZTG2BO6vP6tfLrSVPM/Rl 5dJVLFkB4cgoZKLYDzllYPn9YerUFJnl1H+2ky/skEWf+jDoIw+zVQPhUn/kdBpU gFEbp60FvJK5iRx81fK0liOhZHFefNGsiSSqPVVvP7qRmqgCamZYqfQdRujzZ4Io sW4Q5FECgYEA/iTMjxSnE3x5d8jzR/s5rotEq08XlfVlkAYSxFOje0lOtdlX/OJv 02+4lf0btEOHPcdCbHIuhx6zMlx2TPaXcfgMvowKe+/bfcX76VldhQxj/xJvXzVx acCYY2fRZc69GPsXR+PHANMjI4AZWoDeGYaqxEtMafSQnFiagatyx1kCgYEA93ZA kHUDBHlpkg+bQLrlimMGqXGj4m7TasW/PTxEWe1WbgKuN9o7grGdnAlhKDhdAi9S 4eCNzKA4CTK8Zx9WH6izgq9oushDSofTgzozuPXiJ2PFxDl0nGQLvg2UrgzzBmSK 0GO0Il7tkkDKfZdApFgqyWbA7CrShs1rF9fsYg8CgYEA00kau5Vq9btVbO2mvGAz a1YjZ9ygei6DGkLCVXBHiNbAVlT0XqyOVZUbO68q2ioOBKFlKq2e2vz988+FFqUn 8TtMtRnOGY2myCDSNwTxyAwuEkBsURYoTMguqO4F24MOGPefOkg3CQt/uiLkcSaT /1rDG+CSDcCifSj4gvdbvDkCgYEAorch6xrVuhpvfXg/mMeL6XwFxGMR5PEEmT+f 6Q74zrzNyRaAIf+gg+ZwgUp1lTHCjo45jIbQFo3/aqTu10v2oGiYaMUYM0E9ZgN7 49zgZ61eYJItV0KEV9U9F2HssqmXH0v7Lt1wc+1Bf5qUyxIqkiXbNIUZM/FQbw0h bxMuvqcCgYEA8JMQHjmx9NCUAH9ShHrrqO4qw9NCvAteShx0D/AbQALP5L56QfWQ L0h31nNpL1E2AHAME/ZcWQzeHhrPY0+gOklBRG+mQS2MNOD31bZNUgh6LF20s4M/ 1Qb1srzf9qKbhD2PG3PSSuj1UuFGT/al/L3QOnv4+ewXgL/Iyl7HAgs= -----END RSA PRIVATE KEY-----
# openssl genrsa -out /lee/my.key # 生成RSA私钥同时输出
# openssl rsa -in /lee/my.key -pubout # 查看私钥的公钥 writing RSA key -----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA9armbPLhXtJc70Ktvw0J JEZtWaA6MtWGjL6sr51WGhrC2wcuXVdrQlpWXWxFjO7zlwfIs2Oo9+6LmQdmRbql t0Jmh0RG9XxB51cKR1s8c71k/u2AJm6Ccg8wsxLgBVKrpFB9bZ7WsLAJ7n61mkJu l49Vp/uIuGX+3HEgmgoOWObw6xiCtMSR9c5ksobz3oI6R9ccwpOfcXBWUzVo2fc+ KnuKyM1saR8HXrHBPpoyP6DT2GOvCyLjw1l1c4jPKO6PC2CJMyM4q6EuTow/j8y+ X2vCVPzferYRixH8b96HGisxqD2fUxK1H3RPOCk8L/NiWyE2L5950FgDxUB1gRXA NwIDAQAB -----END PUBLIC KEY-----
# openssl rsa -in /lee/my.key -pubout -out /lee/mypub.key # 输出私钥的公钥
二、配置CA：
1）：查看并修改CA配置文件：
# cat /etc/pki/tls/openssl.cnf # 主要的是下面的内容 #################################################################### [ ca ] default_ca= CA_default# The default ca section #################################################################### [ CA_default ] dir= /etc/pki/CA# Where everything is kept # 默认主工作目录 certs= $dir/certs# Where the issued certs are kept # 客户端证书保存目录 crl_dir= $dir/crl# Where the issued crl are kept # 证书撤销列表位置 database= $dir/index.txt# database index file. # 发放的证书列表，默认是没有这个文件的，需要自己创建 #unique_subject= no# Set to 'no' to allow creation of # several ctificates with same subject. new_certs_dir= $dir/newcerts# default place for new certs. # 新生成的证书 certificate= $dir/cacert.pem # The CA certificate # CA自己的证书（自签署证书） serial= $dir/serial # The current serial number # 序号，默认是没有这个文件的，需要自己创建 crlnumber= $dir/crlnumber# the current crl number # must be commented out to leave a V1 CRL crl= $dir/crl.pem # The current CRL private_key= $dir/private/cakey.pem# The private key # CA的私钥存放位置 RANDFILE= $dir/private/.rand# private random number file x509_extensions= usr_cert# The extentions to add to the cert # Comment out the following two lines for the "traditional" # (and highly broken) format. name_opt = ca_default# Subject Name options cert_opt = ca_default# Certificate field options # Extension copying option: use with caution. # copy_extensions = copy # Extensions to add to a CRL. Note: Netscape communicator chokes on V2 CRLs # so this is commented out by default to leave a V1 CRL. # crlnumber must also be commented out to leave a V1 CRL. # crl_extensions= crl_ext default_days= 365# how long to certify for # 证书默认有效期 default_crl_days= 30# how long before next CRL default_md= sha256# use SHA-256 by default preserve= no# keep passed DN ordering
2）：生成一个CA自己的非对称私钥：
# openssl genrsa -out /etc/pki/CA/private/cakey.pem
3）：生成自签署证书：
# openssl req -new -x509 -key /etc/pki/CA/private/cakey.pem -out /etc/pki/CA/cacert.pem -new：新建 -x509：指定自签署证书 -key：指定非对称秘钥（私钥） -out：输出文件 -days：证书有效期 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 State or Province Name (full name) []:GuangDong Locality Name (eg, city) [Default City]:ShenZhen Organization Name (eg, company) [Default Company Ltd]:test Organizational Unit Name (eg, section) []:test Common Name (eg, your name or your server's hostname) []:ca.test.com Email Address []:[email protected]
# openssl x509 -text -in cacert.pem # 查看证书信息 Certificate: Data: Version: 3 (0x2) Serial Number: ae:af:f9:0e:f3:0e:96:bd Signature Algorithm: sha256WithRSAEncryption Issuer: C=CN, ST=GuangDong, L=ShenZhen, O=test, OU=test, CN=ca.test.com/[email protected] Validity Not Before: Feb 3 07:38:39 2018 GMT Not After : Mar 5 07:38:39 2018 GMT Subject: C=CN, ST=GuangDong, L=ShenZhen, O=test, OU=test, CN=ca.test.com/[email protected] Subject Public Key Info: Public Key Algorithm: rsaEncryption Public-Key: (2048 bit) Modulus: 00:c3:91:60:ee:17:d2:14:36:75:1c:d3:95:ac:43: 69:5c:f0:7f:a6:00:cb:7f:b2:45:5c:1e:0a:da:a9: ba:82:37:7f:36:9c:49:c3:2a:23:2e:b1:fa:78:87: aa:a5:cc:91:2f:55:0f:e5:dd:de:e8:07:46:61:9e: c3:dd:33:12:a1:98:f2:cb:62:00:45:1d:54:89:cb: 28:cb:4f:b4:eb:46:df:df:ca:5b:94:81:64:c0:4f: fe:91:23:a0:33:cf:b8:05:27:63:cc:d2:87:c0:42: 30:d7:1f:d6:e0:3d:61:61:6d:46:2a:99:63:b3:7f: 70:6a:f8:96:5f:9e:f6:b6:9f:8e:44:09:cc:eb:3e: ac:e0:d0:97:5e:43:9a:8d:b2:f9:18:08:73:7f:39: d9:9b:a5:b2:4e:c7:25:93:ce:a6:ee:36:bc:22:e9: 08:8b:17:c0:5e:af:ff:c6:ce:ea:0b:f5:a6:d3:bc: f7:77:76:48:f1:57:25:56:88:6b:73:bf:65:44:59: aa:a4:94:cd:d5:7c:4a:ca:fd:77:19:8e:42:62:3a: d3:4c:7c:b3:2d:73:ac:1c:70:4b:a5:26:cf:62:c0: 2f:e0:c3:06:eb:37:6e:1d:7b:df:53:08:09:bf:e0: 6d:d8:ee:95:6d:1f:d9:df:3e:11:8b:e0:3d:0e:7b: 94:0f Exponent: 65537 (0x10001) X509v3 extensions: X509v3 Subject Key Identifier: 30:2F:BF:46:D3:E2:89:32:F3:76:D8:59:72:E5:06:79:65:E3:FF:2B X509v3 Authority Key Identifier: keyid:30:2F:BF:46:D3:E2:89:32:F3:76:D8:59:72:E5:06:79:65:E3:FF:2B X509v3 Basic Constraints: CA:TRUE Signature Algorithm: sha256WithRSAEncryption c0:d5:cc:e8:65:34:82:b5:99:f5:5d:e9:6d:43:42:c1:8c:01: 0c:09:34:df:d0:46:ca:01:7c:9b:f8:a1:08:e4:99:b1:5c:ef: eb:6d:2d:d5:82:fa:3f:10:c9:96:ac:35:3a:1a:de:a7:37:69: 9d:20:d3:4f:19:3b:29:e8:e1:4a:7e:29:cd:5f:a1:81:f5:3e: 5d:c4:55:e6:e5:5d:c5:87:bd:4f:45:d0:3c:2c:5a:60:9b:2e: 79:23:0d:fa:80:bf:80:83:f2:09:ce:6f:94:5c:c6:21:53:f7: 58:8e:cf:8d:88:7e:c1:57:38:a3:1c:e5:02:16:af:56:51:04: 9e:ad:54:e4:70:1f:76:d9:bf:1d:38:95:e4:94:91:6d:36:87: c4:fa:75:3d:87:53:c9:10:8d:46:81:34:44:e3:53:12:cf:31: ca:10:48:14:c0:6f:d3:7a:3a:62:3f:04:90:f7:00:d6:c0:ce: ea:2f:44:ad:70:36:58:20:04:f9:2a:98:b4:af:fe:b4:67:35: 1d:3b:3e:ea:ba:e4:70:8b:56:f4:d5:bd:61:05:d4:30:23:64: c9:54:cd:96:bf:86:dd:38:41:6a:b1:4e:8d:72:ce:79:b7:fa: 51:53:c5:08:e2:d6:2f:43:b0:39:d4:c3:3c:84:b6:83:23:60: 4b:c0:9e:9d -----BEGIN CERTIFICATE----- MIID4zCCAsugAwIBAgIJAK6v+Q7zDpa9MA0GCSqGSIb3DQEBCwUAMIGHMQswCQYD VQQGEwJDTjESMBAGA1UECAwJR3VhbmdEb25nMREwDwYDVQQHDAhTaGVuWmhlbjEN MAsGA1UECgwEdGVzdDENMAsGA1UECwwEdGVzdDEUMBIGA1UEAwwLY2EudGVzdC5j b20xHTAbBgkqhkiG9w0BCQEWDmFkbWluQHRlc3QuY29tMB4XDTE4MDIwMzA3Mzgz OVoXDTE4MDMwNTA3MzgzOVowgYcxCzAJBgNVBAYTAkNOMRIwEAYDVQQIDAlHdWFu Z0RvbmcxETAPBgNVBAcMCFNoZW5aaGVuMQ0wCwYDVQQKDAR0ZXN0MQ0wCwYDVQQL DAR0ZXN0MRQwEgYDVQQDDAtjYS50ZXN0LmNvbTEdMBsGCSqGSIb3DQEJARYOYWRt aW5AdGVzdC5jb20wggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQDDkWDu F9IUNnUc05WsQ2lc8H+mAMt/skVcHgraqbqCN382nEnDKiMusfp4h6qlzJEvVQ/l 3d7oB0ZhnsPdMxKhmPLLYgBFHVSJyyjLT7TrRt/fyluUgWTAT/6RI6Azz7gFJ2PM 0ofAQjDXH9bgPWFhbUYqmWOzf3Bq+JZfnva2n45ECczrPqzg0JdeQ5qNsvkYCHN/ OdmbpbJOxyWTzqbuNrwi6QiLF8Ber//GzuoL9abTvPd3dkjxVyVWiGtzv2VEWaqk lM3VfErK/XcZjkJiOtNMfLMtc6wccEulJs9iwC/gwwbrN24de99TCAm/4G3Y7pVt H9nfPhGL4D0Oe5QPAgMBAAGjUDBOMB0GA1UdDgQWBBQwL79G0+KJMvN22Fly5QZ5 ZeP/KzAfBgNVHSMEGDAWgBQwL79G0+KJMvN22Fly5QZ5ZeP/KzAMBgNVHRMEBTAD AQH/MA0GCSqGSIb3DQEBCwUAA4IBAQDA1czoZTSCtZn1XeltQ0LBjAEMCTTf0EbK AXyb+KEI5JmxXO/rbS3Vgvo/EMmWrDU6Gt6nN2mdINNPGTsp6OFKfinNX6GB9T5d xFXm5V3Fh71PRdA8LFpgmy55Iw36gL+Ag/IJzm+UXMYhU/dYjs+NiH7BVzijHOUC Fq9WUQSerVTkcB922b8dOJXklJFtNofE+nU9h1PJEI1GgTRE41MSzzHKEEgUwG/T ejpiPwSQ9wDWwM7qL0StcDZYIAT5Kpi0r/60ZzUdOz7quuRwi1b01b1hBdQwI2TJ VM2Wv4bdOEFqsU6Ncs55t/pRU8UI4tYvQ7A51MM8hLaDI2BLwJ6d -----END CERTIFICATE-----
4）：创建CA工作目录下的必要文件
# touch /etc/pki/CA/index.txt # 创建证书发放列表文件 # touch /etc/pki/CA/serial # 创建序号文件 # echo "01" > /etc/pki/CA/serial # 写入起始序号
四、向CA申请证书：
1）：生成一个自己的非对称密钥
# openssl genrsa -out /lee/my.key
2）：申请证书（在这里私有CA申请流程就是一个证书生成的步骤了）
# openssl req -new -key /lee/my.key -out /lee/my.crt # 注意这里没有-x509的选项了，-x509代表的是自签署 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 State or Province Name (full name) []:GuangDong Locality Name (eg, city) [Default City]:ShenZhen Organization Name (eg, company) [Default Company Ltd]:test Organizational Unit Name (eg, section) []:test Common Name (eg, your name or your server's hostname) []:www.test.com Email Address []:[email protected] Please enter the following 'extra' attributes to be sent with your certificate request A challenge password []: An optional company name []:
3）：CA签署证书：
# openssl ca -in /lee/my.crt -out www.test.com.crt Using configuration from /etc/pki/tls/openssl.cnf Check that the request matches the signature Signature ok Certificate Details: Serial Number: 1 (0x1) Validity Not Before: Feb 3 08:29:30 2018 GMT Not After : Feb 3 08:29:30 2019 GMT Subject: countryName = CN stateOrProvinceName = GuangDong organizationName = test organizationalUnitName = test commonName = www.test.com emailAddress = [email protected] X509v3 extensions: X509v3 Basic Constraints: CA:FALSE Netscape Comment: OpenSSL Generated Certificate X509v3 Subject Key Identifier: 36:1E:30:68:9A:42:75:DE:EA:BE:F3:FF:EB:3C:26:5F:5B:30:4B:30 X509v3 Authority Key Identifier: keyid:30:2F:BF:46:D3:E2:89:32:F3:76:D8:59:72:E5:06:79:65:E3:FF:2B Certificate is to be certified until Feb 3 08:29:30 2019 GMT (365 days) Sign the certificate? [y/n]:y 1 out of 1 certificate requests certified, commit? [y/n]y Write out database with 1 new entries Data Base Updated
[[email protected] CA]# cat index.txt # 查看下证书颁发列表，发现已经有了一条信息，”01“就是从刚才的serial中继承来的 V190203082930Z01unknown/C=CN/ST=GuangDong/O=test/OU=test/CN=www.test.com/[email protected]
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