關(guān)于pkcs8 與 rsa 互轉(zhuǎn)的一個(gè)坑

其實(shí)最主要就2條命令(環(huán)境為centos6.5 已安裝openssl openssl-devel 這2個(gè)包):

pkcs8轉(zhuǎn)rsa:

openssl rsa -in pkcs8密鑰 -out rsa密鑰

rsa轉(zhuǎn)pkcs8:

openssl pkcs8 -topk8 -inform PEM -in rsa密鑰 -outform PEM -nocrypt -out pkcs8密鑰

但是坑的地方是格式

看個(gè)例子(pkcs8轉(zhuǎn)rsa)：

假設(shè)開發(fā)給過來一個(gè)密鑰

[root@localhost test]# cat test.pkcs8 

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

[root@localhost test]# 

我開始使用命令轉(zhuǎn)換

[root@localhost test]# openssl rsa -in test.pkcs8 -out test.rsa

unable to load Private Key

139656125785928:error:0906D06C:PEM routines:PEM_read_bio:no start line:pem_lib.c:703:Expecting: ANY PRIVATE KEY

[root@localhost test]# 

報(bào)錯了！

然后習(xí)慣性百度：

大概說的是 需要添加頭部和尾部然后試試

[root@localhost test]# cat test.pkcs8 

-----BEGIN PRIVATE KEY-----

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

-----END PRIVATE KEY-----

[root@localhost test]# openssl rsa -in test.pkcs8 -out test.rsa

unable to load Private Key

140395488638792:error:0906D064:PEM routines:PEM_read_bio:bad base64 decode:pem_lib.c:812:

[root@localhost test]# 

ps:rsa和pkcs8頭尾是不一樣的這里我加的是pkcs8的 不過還是不行。

然后大量的谷歌 大量的百度。。so就是沒有找到為什么。。之后我開始模擬生成rsa 在轉(zhuǎn)成pkcs8 看能不能轉(zhuǎn)回來

[root@localhost test]# openssl genrsa -out 1 1024

Generating RSA private key, 1024 bit long modulus

...........................++++++

........++++++

e is 65537 (0x10001)

[root@localhost test]# cat 1

-----BEGIN RSA PRIVATE KEY-----

MIICXQIBAAKBgQDaps4+IdCD7nmalOhcx2FndMok++4ZeT1heQhS4dxwmZRcUSoA

2fW/2slVpBt0dWozrjyF0XO+j2M7OZkz6A7G6lgEshtIWhHYOsjkujQuQp5kDhsm

LyB0pa9CcvX/HzdG/gFPqlaoRrqDH0/ZOtt0gukp8uIdvXqwLO3fyR/48wIDAQAB

AoGBAIJBkOgOuOt/q83dG7f5xxscxjfWJXfjdB+XPNAzYWFq/KkqaP1s2yvaKMru

IrT0Jbp39/I4Xt2NCi6EF7KGchYQJFFw5Vk7rx+yWcSwzn5VMkLTCXo5VRRcXADP

j8oO0mNotEeA3Lm9s1ItyAJYiDd/hVZ9B8mVNGKabwtmWV8BAkEA8GiW9q32IV2D

0fy5S+ozyrsOeA7sQMgVp2wZ1Oo/WTvC8a/Lrny5W0AUggM7J+IMVxdqaGgzOrhJ

TNikdNVbswJBAOjU/k6TMZz1kC/SAv8PiNmVg+WEYeJjxOtm4wlyQFOjS74Az2U4

sRIvHmNs9Lp6CvHjkfeSCr0aqTAYIY0LTcECQHnONDbV2y/6hpB9QJEDH6ym6+TO

g***1TTXo5rp+KDIk7QKwuMsVGm0ZO+enXlOobv6pDI0IUiuGI1z8pczhtsCQQDe

6bVEU0aHyM8wCXhW7G+QKcaqwnDYx75rxgiOLbWKnefRVIM7nOhiyXvloxY3Rssd

xUwl48umO1VKN4A/wlfBAkB6/wdKAgw1lNXbDX0qXBgT7ODq/tMYPkSkHej+KXOJ

T1pMPLALJK1BRQgiYndR6Fp97oXz8rhflPgXq8ys+Bvf

-----END RSA PRIVATE KEY-----

[root@localhost test]# openssl pkcs8 -topk8 -inform PEM -in 1 -outform PEM -nocrypt -out 1.pkcs8

[root@localhost test]# cat 1.pkcs8 

-----BEGIN PRIVATE KEY-----

MIICdwIBADANBgkqhkiG9w0BAQEFAASCAmEwggJdAgEAAoGBANqmzj4h0IPueZqU

6FzHYWd0yiT77hl5PWF5CFLh4HCZlFxRKgDZ9b/ayVWkG3R1ajOuPIXRc76PYzs5

mTPoDsbqWASyG0haEdg6yOS6NC5CnmQOGyYvIHSlr0Jy9f8fN0b+AU+qVqhGuoMf

T9k623SC6Sny4h39erAs7d/JH/jzAgMBAAECgYEAgkGQ6A6463+rzd0bt/nHGxzG

N9Yld+N0H5c80DNhYWr8qSpo/WzbK9ooyu4itPQlunf38jhe3Y0KLoQXsoZyFhAk

UXDlWTuvH7JZxLDOflUyQtMJejlVFFxcAM+Pyg7SY2i0R4Dcub2zUi3IAliIN3+F

Vn0HyZU0YppvC2ZZXwECQQDwaJb2rfYhXYPR/LlL6jPKuw54DuxAyBWnbBnU6j9Z

O8Lxr8uufLlbQBSCAzsn4gxXF2poaDM6uElM2KR01VuzAkEA6NT+TpMxnPWQL9IC

/w+I2ZWD5YRh5mPE62bjCXJAU6NLvgDPZTixEi8eY2z0unoK8eOR95IKvRqpMBgh

jQtNwQJAec40NtXbL/qGkH1AkQMfrKbr5M6CyyvVNNejmun4oMiTtArC4yxUabRk

756deU6hu/qkMjQhSK4YjXPylzOG2wJBAN7ptURTRofIzzAJeFbsb5ApxqrCcNjH

vmvGCI4ttYqd59FUgzuc6GLJe+WjFjdGyx3FTCXjy6Y7VUo3gD/CV8ECQHr/B0oC

DDWU1dsNfSpcGBPs4Or+0xg+RKQd6P4pc4lPWkw8sAskrUFFCCJid1HoWn3uhfPy

uF+U+BerzKz4G98=

-----END PRIVATE KEY-----

[root@localhost test]# openssl rsa -in 1.pkcs8 -out 1.rsa

writing RSA key

[root@localhost test]# cat 1.rsa 

-----BEGIN RSA PRIVATE KEY-----

MIICXQIBAAKBgQDaps4+IdCD7nmalOhcx2FndMok++4ZeT1heQhS4dxwmZRcUSoA

2fW/2slVpBt0dWozrjyF0XO+j2M7OZkz6A7G6lgEshtIWhHYOsjkujQuQp5kDhsm

LyB0pa9CcvX/HzdG/gFPqlaoRrqDH0/ZOtt0gukp8uIdvXqwLO3fyR/48wIDAQAB

AoGBAIJBkOgOuOt/q83dG7f5xxscxjfWJXfjdB+XPNAzYWFq/KkqaP1s2yvaKMru

IrT0Jbp39/I4Xt2NCi6EF7KGchYQJFFw5Vk7rx+yWcSwzn5VMkLTCXo5VRRcXADP

j8oO0mNotEeA3Lm9s1ItyAJYiDd/hVZ9B8mVNGKabwtmWV8BAkEA8GiW9q32IV2D

0fy5S+ozyrsOeA7sQMgVp2wZ1Oo/WTvC8a/Lrny5W0AUggM7J+IMVxdqaGgzOrhJ

TNikdNVbswJBAOjU/k6TMZz1kC/SAv8PiNmVg+WEYeJjxOtm4wlyQFOjS74Az2U4

sRIvHmNs9Lp6CvHjkfeSCr0aqTAYIY0LTcECQHnONDbV2y/6hpB9QJEDH6ym6+TO

g***1TTXo5rp+KDIk7QKwuMsVGm0ZO+enXlOobv6pDI0IUiuGI1z8pczhtsCQQDe

6bVEU0aHyM8wCXhW7G+QKcaqwnDYx75rxgiOLbWKnefRVIM7nOhiyXvloxY3Rssd

xUwl48umO1VKN4A/wlfBAkB6/wdKAgw1lNXbDX0qXBgT7ODq/tMYPkSkHej+KXOJ

T1pMPLALJK1BRQgiYndR6Fp97oXz8rhflPgXq8ys+Bvf

-----END RSA PRIVATE KEY-----

[root@localhost test]# 

然后再看看自己的

[root@localhost test]# cat test.pkcs8 

-----BEGIN PRIVATE KEY-----

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

-----END PRIVATE KEY-----

[root@localhost test]# 

難道是因?yàn)樾枰指睿?br />

[root@localhost test]# cat test.pkcs8 

-----BEGIN PRIVATE KEY-----

MIICdQIBADANBgkqhkiG9w0BAQEFAASCAl8wggJbAgEAAoGBANzST5PZDWx+HWdD

VAGE4PlADMB4gm1r0AGCvmcm68diL6Gjspm7flIesPURVxbEMzyUjMxPCm6aLPfc

YSvORqDXR67ygUWszcPGtJDB/KPl+efDeCunKKQhmriyZIkdeOEjvlxjtmcji+vL

7cC7nIcvlPx8EywzM9bwvfg/0hSDAgMBAAECgYA4O3I6Uy6g7yirsDCHRoBH2LCm

nsmP9cF9cP7to7KtDmrUvavwjBdp8Bjd/3FvAb2OcsG8EXC1o5tJ7xvrnNbNC4zh

HabMbFs9hCnahJbLIe7AJFerwQJRhtT7DmX0ax6MtdPXrFGoGUyM5uc5JX5cUCtz

E7vhMO0nvLSKu/bw6QJBAO8npWjXdIy+BjKBsWYXHmlUg3m84P735z6qGdK/Xxq9

U/F9v2XFd6TSfwWNFPFWoXnjnAg6J2nD4hD2J8/wam0CQQDsYBWl0/AX3CvZFR5t

kBXCMmf30mQvziiJUbC5EPj4Jh5GirXevFSFcsie3H2D7xQ55FC2IVCNJeM0isGo

SiSvAkABRCl5C6L/V8Y6oDsrOjYcAqmLjHd4giGEUGxAlGjRgG0gWzUXOdtvUPoB

MoUI3heOyKi71mr9AV+CDXuae0BlAkAZB+PC97qJDEuoZVAfkg57zhKsb58kYNRy

FjB8qIt027R6RN4VhCP/LbSI/hhcjEi8CK1zW/vHtqdkvPzc8V0JAkBzCYP7ggfb

B6Ea0kd4+FoKkddwb91h5tQHH6BXsDl1CURqT2HGeiAbLkETcp7Wsgs5HiMHGcVx

v8Xt/mtwFLMK

-----END PRIVATE KEY-----

[root@localhost test]# openssl rsa -in test.pkcs8 -out test.rsa

writing RSA key

[root@localhost test]# cat test.rsa

-----BEGIN RSA PRIVATE KEY-----

MIICWwIBAAKBgQDc0k+T2Q1sfh2nQ1QBhOD5QAzAeIJta9ABgr5nJuvHYi+ho7KZ

u35SHrD1EVcWxDM8lIzMTwpumiz33GErzkag10eu8oFFrM3DxrSQwfyj5fnnw3gr

pyikIZq4smSJHXjhI75cY7ZnI4vry+3Au5yHL5T8fBMsMzPW8L34P9IUgwIDAQAB

AoGAODtyOlMuoO8oq7Awh0aAR9iwpp7Jj/XBfXD+7aOyrQ5q1L2r8IwXafAY3f9x

bwG9jnLBvBFwtaObSe8b65zWzQuM4R2mzGxbPYQp2oSWyyHuwCRXq8ECUYbU+w5l

9GsejLXT16xRqBlMjObnOSV+XFArcxO74TDtJ7y0irv28OkCQQDvJ6Vo13SMvgYy

gbFmFx5pVIN5vOD+9+c+qhnSv18avVPxfb9lxXek0n8FjRTxVqF545wIOidpw+IQ

9ifP8GptAkEA7GAVpdPwF9wr2RUebZAVwjJn99JkL84oiVGwuRD4+CYeBoq13rxU

hXLIntx9g+8UOeRQtiFQjSXjNIrBqEokrwJAAUQpeQui/1fGOqA7Kzo2HAKpi4x3

eIIhhFBsQJRo0YBtIFs1Fznbb1D6ATKFCN4Xjsiou9Zq/QFfgg17mntAZQJAGQfj

wve6iQxLqGVQH5IOe84SrG+fJGDUchYwfKiLdNu0ekTeFYQj/y20iP4YXIxIvAit

c1v7x7anZLz83PFdCQJAcwmD+4IH2wehGtJHePhaCpHXcG/dYeLUBx+gV7A5dQlE

ak9hxnogGy5BE3Ke1rILOR4jBxnFcb/F7f5rcBSzCg==

-----END RSA PRIVATE KEY-----

[root@localhost test]# 

然后搞定！。。

結(jié)論：雖然不知道是為什么，但是確實(shí)這個(gè)密鑰對格式有一定的要求并不能像代碼一樣一行就能搞定 轉(zhuǎn)換的時(shí)候 需要加上頭部底部 在對字符串 以相應(yīng)的格式 換行 才能轉(zhuǎn)換