pkcs1与pkcs8格式RSA私钥互相转换

转自：http://blog.csdn.net/duan19056/article/details/52104966

 

1、PKCS1私钥生成

     openssl genrsa -out private.key 1024

     private.key文件内容如下：

     -----BEGIN RSA PRIVATE KEY-----
     MIICXQIBAAKBgQDREk3uy4x9i4a16OYOYEp5Ir2f16lsmUHB2HjGDlxkU0ju9YAp
     yeZlUXb191ZkxJ2vx2+vKppN4gKLDy5r7JMTpwch1CNvceySX6DiM4lwTAnUEZiB
     YgNBNrKINEtJmXWSZBTeR7v7HH/ExNP5vyhhk06L1lOoknhYcq99FjTGhwIDAQAB
     AoGABOtPVh0H8zRDOSh/sTrmxa7hk085t0pr16nGPbK8zcd/4c948oLDnwKpr+Pf
     7oMJyscAg7iW5No6gRccWoG4fCT5jBvJzcMloZnA36sE0btzlTj//714oBYiEcO4
     aWC7JByMgVWZ2WakqLQGoiv4oKdzizgc0LmCC3XM5+F+RpECQQD4yHQJuJd6/jgX
     IE8v83AiUJDh0N8nOt2SGqWzZpYKM1OUQIV+ss3SkRz5yWqfUBKgyU8OVkRWj78R
     uZi2WsijAkEA1yLwo+prkBm5rgbQIGRnDJ5Bbf/0/p+fSJfm2tiQ1o94TjuhJs49
     ehFLtJKpQT93xlOnFwI7rAJWVUdLPUs0zQJAL46iH/mZe3l9X25dtNzkYqrkB0bW
     YblvAa72XgUOSYTmRUDQRBgKIGZ9E4LdTvcPmIzi/+qdxa5U6B6Cgtl34QJBAIqU
     zz5HexJP//PCH7897cOLDcq13jNGz2wLrYG7j1EnCfAbKSu+HovLKGEhODX3lEgF
     CtUfcyDSQJqeWjEZiOECQQC9vagG0+dxLmvlXg6sYEN1c+eI8KJIapKg0XBzPAqY
     cfT2chF3dUPA3oTfrk51MbHaGjI1Ukd76Vp2Q83JClbp
     -----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.key -outform pem -nocrypt -out pkcs8.pem

     pkcs8.pem文件内容

     -----BEGIN PRIVATE KEY-----
    MIICdwIBADANBgkqhkiG9w0BAQEFAASCAmEwggJdAgEAAoGBANESTe7LjH2LhrXo
    5g5gSnkivZ/XqWyZQcHYeMYOXGRTSO71gCnJ5mVRdvX3VmTEna/Hb68qmk3iAosP
    LmvskxOnByHUI29x7JJfoOIziXBMCdQRmIFiA0E2sog0S0mZdZJkFN5Hu/scf8TE
    0/m/KGGTTovWU6iSeFhyr30WNMaHAgMBAAECgYAE609WHQfzNEM5KH+xOubFruGT
    Tzm3SmvXqcY9srzNx3/hz3jygsOfAqmv49/ugwnKxwCDuJbk2jqBFxxagbh8JPmM
    G8nNwyWhmcDfqwTRu3OVOP//vXigFiIRw7hpYLskHIyBVZnZZqSotAaiK/igp3OL
    OBzQuYILdczn4X5GkQJBAPjIdAm4l3r+OBcgTy/zcCJQkOHQ3yc63ZIapbNmlgoz
    U5RAhX6yzdKRHPnJap9QEqDJTw5WRFaPvxG5mLZayKMCQQDXIvCj6muQGbmuBtAg
    ZGcMnkFt//T+n59Il+ba2JDWj3hOO6Emzj16EUu0kqlBP3fGU6cXAjusAlZVR0s9
    SzTNAkAvjqIf+Zl7eX1fbl203ORiquQHRtZhuW8BrvZeBQ5JhOZFQNBEGAogZn0T
    gt1O9w+YjOL/6p3FrlToHoKC2XfhAkEAipTPPkd7Ek//88Ifvz3tw4sNyrXeM0bP
    bAutgbuPUScJ8BspK74ei8soYSE4NfeUSAUK1R9zINJAmp5aMRmI4QJBAL29qAbT
    53Eua+VeDqxgQ3Vz54jwokhqkqDRcHM8Cphx9PZyEXd1Q8DehN+uTnUxsdoaMjVS
    R3vpWnZDzckKVuk=
    -----END PRIVATE KEY-----

3、PKCS8格式私钥转换为PKCS1（传统私钥格式）

     openssl pkcs8 -in pkcs8.pem -nocrypt -out pri_key.pem

     pri_key.pem文件内容如下：

     -----BEGIN RSA PRIVATE KEY-----
     MIICXQIBAAKBgQDREk3uy4x9i4a16OYOYEp5Ir2f16lsmUHB2HjGDlxkU0ju9YAp
     yeZlUXb191ZkxJ2vx2+vKppN4gKLDy5r7JMTpwch1CNvceySX6DiM4lwTAnUEZiB
     YgNBNrKINEtJmXWSZBTeR7v7HH/ExNP5vyhhk06L1lOoknhYcq99FjTGhwIDAQAB
     AoGABOtPVh0H8zRDOSh/sTrmxa7hk085t0pr16nGPbK8zcd/4c948oLDnwKpr+Pf
     7oMJyscAg7iW5No6gRccWoG4fCT5jBvJzcMloZnA36sE0btzlTj//714oBYiEcO4
     aWC7JByMgVWZ2WakqLQGoiv4oKdzizgc0LmCC3XM5+F+RpECQQD4yHQJuJd6/jgX
     IE8v83AiUJDh0N8nOt2SGqWzZpYKM1OUQIV+ss3SkRz5yWqfUBKgyU8OVkRWj78R
     uZi2WsijAkEA1yLwo+prkBm5rgbQIGRnDJ5Bbf/0/p+fSJfm2tiQ1o94TjuhJs49
     ehFLtJKpQT93xlOnFwI7rAJWVUdLPUs0zQJAL46iH/mZe3l9X25dtNzkYqrkB0bW
     YblvAa72XgUOSYTmRUDQRBgKIGZ9E4LdTvcPmIzi/+qdxa5U6B6Cgtl34QJBAIqU
     zz5HexJP//PCH7897cOLDcq13jNGz2wLrYG7j1EnCfAbKSu+HovLKGEhODX3lEgF
     CtUfcyDSQJqeWjEZiOECQQC9vagG0+dxLmvlXg6sYEN1c+eI8KJIapKg0XBzPAqY
     cfT2chF3dUPA3oTfrk51MbHaGjI1Ukd76Vp2Q83JClbp
     -----END RSA PRIVATE KEY-----

 

在线转换工具：http://tool.chacuo.net/cryptrsapkcs1pkcs8