# 生成RSA密钥
openssl genrsa -out public.pem 4096
# 提取RSA公钥
openssl rsa -in private.pem -pubout > public.pem
# RSA私钥签名
openssl dgst -sign private.pem -sha256 -out sign.txt test.txt
# RSA公钥验签
openssl dgst -verify public.pem -sha256 -signature sign.txt test.txt

# 查看RSA私钥信息
openssl rsa -in private.pem -noout -text
# 查看RSA公钥信息
openssl rsa -pubin -in public.pem -noout -text