I recently encountered an issue while trying to tướng convert an encrypted RSA private key to tướng an unencrypted RSA key using OpenSSL 3.3.0 on my Mac. By mặc định, the command outputs the key in "-----BEGIN PRIVATE KEY-----" format, but I need it in "-----BEGIN RSA PRIVATE KEY-----" format.

Here's the command I initially used:

openssl rsa -in tên miền.key -out domain-rsa.key

Problem:

The output I got was:

-----BEGIN PRIVATE KEY-----
...
-----END PRIVATE KEY-----

I found that with version 3.0 and later of OpenSSL, the -traditional flag is required to tướng get the desired format because OpenSSL has adopted PKCS#8 as the mặc định standard. The correct command is:

openssl rsa -in tên miền.key -out domain-rsa.key -traditional

This command outputs the domain-rsa.key in the format I needed:

-----BEGIN RSA PRIVATE KEY-----
...
-----END RSA PRIVATE KEY-----

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