安装
openssl，若已安装则跳过
生成RSA私钥
使用openssl来生成RSA私钥文件，输入如下命令(该命令会生成2048位的私钥)
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| openssl genrsa -out rsa_private_key.pem 2048
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显示如下结果则生成私钥成功
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| MacBook-Pro-6:pem tanxinzheng$ openssl genrsa -out rsa_private_key.pem 2048
Generating RSA private key, 2048 bit long modulus
....................+++
.+++
e is 65537 (0x10001)
MacBook-Pro-6:pem tanxinzheng$ ll
total 8
-rw-r--r-- 1 tanxinzheng staff 1675 Dec 17 18:45 rsa_private_key.pem
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查看私钥文件内容，RSA私钥格式如下：
注：因太长…..省略部分内容
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| -----BEGIN RSA PRIVATE KEY-----
MIIEowIBAAKCAQEAzVHzaYFDgEDhIllCBZppYKsaLdYaC9D7IdkBMqroteeHRCaW
rUgGa0urV8tLygJ5B+l1YBg9EGXouilMEkuX/JsuYCUnqi3M0iqAFYWIyX7sXoKG
p3OkXlj9lMYS9mwAm4MqS6n5AmWK9JqlfPdYhImkxzt/njmQRJCLjNl7fHh6sc1R
G7YzjiZQxDH6xQDQAjXM77OXbTLxNqWWsi0Gn8dObD0G/kuQEWFJpmIBbzT9zizv
........
2xYP/ZoYb6wAe4PzYlJTi/rD8vBdLuBqBKInBfHDe4WvUgOv4Xiu1vxs7lDPyPw5
2RnLAoGBANpHS9MdFlO6CtOVC1HYMifGY4LcxN7mnJJld2LP7v08pRzhwokMaIBu
cBH/R0utDLsU9nivvdKjeacQ70pLPpAqDLsQWQxLvOXLLCooLC3RJqpsQp1l4g/I
sqBVHkCKFTWAw7K28sZdchBHtM/ELH5Tbac2uPEEWtDpzBJ8n4on
-----END RSA PRIVATE KEY-----
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生成RSA公钥
使用如下命令生成公钥：
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| openssl rsa -in rsa_private_key.pem -pubout -out rsa_public_key.pem
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显示如下结果则生成公钥成功
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| MacBook-Pro-6:pem tanxinzheng$ openssl rsa -in rsa_private_key.pem -pubout -out rsa_public_key.pem
writing RSA key
MacBook-Pro-6:pem tanxinzheng$ ll
total 16
-rw-r--r-- 1 tanxinzheng staff 1675 Dec 17 18:45 rsa_private_key.pem
-rw-r--r-- 1 tanxinzheng staff 451 Dec 17 18:47 rsa_public_key.pem
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查看公钥文件内容，RSA公钥格式如下：
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| -----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzVHzaYFDgEDhIllCBZpp
YKsaLdYaC9D7IdkBMqroteeHRCaWrUgGa0urV8tLygJ5B+l1YBg9EGXouilMEkuX
/JsuYCUnqi3M0iqAFYWIyX7sXoKGp3OkXlj9lMYS9mwAm4MqS6n5AmWK9JqlfPdY
hImkxzt/njmQRJCLjNl7fHh6sc1RG7YzjiZQxDH6xQDQAjXM77OXbTLxNqWWsi0G
n8dObD0G/kuQEWFJpmIBbzT9zizvWsI5gc3jl1Ifp3urk+cexWmZpqavCRK08aee
5+yqXOk3xk8dqjX4zk6J66bDbiEYQXZcZTaCnTDDiZ4/UiqTue9lKZeUoveuwIfX
WwIDAQAB
-----END PUBLIC KEY-----
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