Troubleshooting Encrypted Private Key Decryption Error

When attempting to read an encrypted PKCS8 private key file in Go, developers may encounter the following error: "x509: no DEK-Info header in block." This error indicates that the library cannot decrypt the key.

The user provided an example key generation process using OpenSSL:

openssl genrsa -out file.pem -passout pass:file -aes256 1024
openssl pkcs8 -topk8 -inform pem -in file.pem -outform pem -out filePKCS8.pem

And attempted to decrypt the key in Go:

block, _ := pem.Decode(key)
return x509.DecryptPEMBlock(block, password)

However, the standard Go library lacks a function to decrypt encrypted PKCS8 keys. To resolve this issue, consider using a third-party package like:

https://github.com/youmark/pkcs8/blob/master/pkcs8.go#L103

This package provides the necessary functionality for decrypting encrypted PKCS8 keys in Go.