如何在两种公钥格式之间转换，一种是"BEGIN RSA PUBLIC KEY"，另一种是"BEGIN PUBLIC KEY". [英] How can I transform between the two styles of public key format, one "BEGIN RSA PUBLIC KEY", the other is "BEGIN PUBLIC KEY"

问题描述

如何在两种公钥格式样式之间转换， 一种格式是:

How can I transform between the two styles of public key format, one format is:

-----BEGIN PUBLIC KEY-----
...
-----END PUBLIC KEY-----

另一种格式是:

-----BEGIN RSA PUBLIC KEY-----
...
-----END RSA PUBLIC KEY-----

例如，我使用ssh-keygen命令生成了id_rsa/id_rsa.pub对， 我使用以下方法从id_rsa计算了公钥:

for example I generated id_rsa/id_rsa.pub pair using ssh-keygen command, I calculated the public key from id_rsa using:

openssl rsa -in id_rsa -pubout -out pub2 

然后我再次使用以下代码从id_rsa.pub计算出公钥:

then again I calculated the public key from id_rsa.pub using :

ssh-keygen -f id_rsa.pub -e -m pem > pub1

内容为pub1是:

-----BEGIN RSA PUBLIC KEY-----
MIIBCgKCAQEA61BjmfXGEvWmegnBGSuS+rU9soUg2FnODva32D1AqhwdziwHINFa
D1MVlcrYG6XRKfkcxnaXGfFDWHLEvNBSEVCgJjtHAGZIm5GL/KA86KDp/CwDFMSw
luowcXwDwoyinmeOY9eKyh6aY72xJh7noLBBq1N0bWi1e2i+83txOCg4yV2oVXhB
o8pYEJ8LT3el6Smxol3C1oFMVdwPgc0vTl25XucMcG/ALE/KNY6pqC2AQ6R2ERlV
gPiUWOPatVkt7+Bs3h5Ramxh7XjBOXeulmCpGSynXNcpZ/06+vofGi/2MlpQZNhH
Ao8eayMp6FcvNucIpUndo1X8dKMv3Y26ZQIDAQAB
-----END RSA PUBLIC KEY-----

并且pub2的内容是:

and the content of pub2 is :

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA61BjmfXGEvWmegnBGSuS
+rU9soUg2FnODva32D1AqhwdziwHINFaD1MVlcrYG6XRKfkcxnaXGfFDWHLEvNBS
EVCgJjtHAGZIm5GL/KA86KDp/CwDFMSwluowcXwDwoyinmeOY9eKyh6aY72xJh7n
oLBBq1N0bWi1e2i+83txOCg4yV2oVXhBo8pYEJ8LT3el6Smxol3C1oFMVdwPgc0v
Tl25XucMcG/ALE/KNY6pqC2AQ6R2ERlVgPiUWOPatVkt7+Bs3h5Ramxh7XjBOXeu
lmCpGSynXNcpZ/06+vofGi/2MlpQZNhHAo8eayMp6FcvNucIpUndo1X8dKMv3Y26
ZQIDAQAB
-----END PUBLIC KEY-----

根据我的理解，pub1和pub2包含相同的公钥信息，但是它们的格式不同，我想知道如何在两种格式之间转换?谁能给我介绍一下丝束格式的简要介绍?

According to my understanding, pub1 and pub2 contain the same public key information, but they are in different format, I wonder how can I transform between the two format? Can anyone show me some concise introduction on the tow formats?

推荐答案

使用 phpseclib，纯PHP RSA实现 ...

<?php
include('Crypt/RSA.php');

$rsa = new Crypt_RSA();
$rsa->loadKey('-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA61BjmfXGEvWmegnBGSuS
+rU9soUg2FnODva32D1AqhwdziwHINFaD1MVlcrYG6XRKfkcxnaXGfFDWHLEvNBS
EVCgJjtHAGZIm5GL/KA86KDp/CwDFMSwluowcXwDwoyinmeOY9eKyh6aY72xJh7n
oLBBq1N0bWi1e2i+83txOCg4yV2oVXhBo8pYEJ8LT3el6Smxol3C1oFMVdwPgc0v
Tl25XucMcG/ALE/KNY6pqC2AQ6R2ERlVgPiUWOPatVkt7+Bs3h5Ramxh7XjBOXeu
lmCpGSynXNcpZ/06+vofGi/2MlpQZNhHAo8eayMp6FcvNucIpUndo1X8dKMv3Y26
ZQIDAQAB
-----END PUBLIC KEY-----');
$rsa->setPublicKey();

echo $rsa->getPublicKey(CRYPT_RSA_PUBLIC_FORMAT_PKCS1_RAW);

base64编码的内容似乎匹配，即使标头显示BEGIN PUBLIC KEY而不是BEGIN RSA PUBLIC KEY.因此，也许只需使用str_replace即可解决该问题，那么您应该一切顺利！

The base64-encoded stuff appears to match even though the header says BEGIN PUBLIC KEY and not BEGIN RSA PUBLIC KEY. So maybe just use str_replace to fix that and you should be good to go!

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