Mac使用自帶OpenSSL生成RSA公鑰與私鑰

OpenSSL> genrsa -out rsa_private_key.pem 2048
Generating RSA private key, 2048 bit long modulus
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e is 65537 (0x10001)
OpenSSL> pkcs8 -topk8 -inform PEM -in rsa_private_key.pem -outform PEM -nocrypt -out rsa_private_key_pkcs8.pem
OpenSSL> rsa -in rsa_private_key.pem -pubout -out rsa_public_key.pem
writing RSA key
OpenSSL> exit