注：亲验可用
转载自：https://www.jianshu.com/p/08e41304edab
1、PKCS1私钥生成
openssl genrsa -out private.pem 1024
private.pem 的内容如下：
-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----
2、PKCS1私钥转换为PKCS8(该格式一般Java调用)
openssl pkcs8 -topk8 -inform PEM -in private.pem -outform pem -nocrypt -out pkcs8.pem
pkcs8.pem文件内容
-----BEGIN PRIVATE KEY-----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-----END PRIVATE KEY-----
3、PKCS8格式私钥转换为PKCS1（传统私钥格式）
openssl rsa -in pkcs8.pem -out pkcs1.pem
pkcs1.pem文件内容如下：
-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----
作者：一本大书
链接：https://www.jianshu.com/p/08e41304edab
來源：简书
简书著作权归作者所有，任何形式的转载都请联系作者获得授权并注明出处。