How to Decrypt Encrypted PKCS8 Keys in Go: \"No DEK-Info header in block\" Error Solution?

Go: "No DEK-Info header in block" Error While Decrypting Encrypted PKCS8 Keys

When attempting to decrypt an encrypted PKCS8 private key in Go, you may encounter an error message stating "x509: no DEK-Info header in block." This error indicates that the block provided does not contain the necessary DEK-Info header, which is essential for decrypting the key.

The issue lies in the fact that the standard Go library does not provide a native function for decrypting encrypted PKCS8 keys. To address this, you can utilize third-party libraries or custom code.

Here's a suitable library that can handle encrypted PKCS8 files: https://github.com/youmark/pkcs8/blob/master/pkcs8.go#L103

By incorporating the pkcs8 package into your code, you can successfully decrypt encrypted PKCS8 private keys using the following code snippet:

<code class="go">import "github.com/youmark/pkcs8"

func DecryptPKCS8Key(key []byte, password string) ([]byte, error) {
    block, _ := pem.Decode(key)
    return pkcs8.Decrypt(block.Bytes, []byte(password))
}</code>

This code snippet uses the Decrypt function from the pkcs8 package to decrypt the encrypted PKCS8 key. The first parameter is the encoded key data, while the second parameter is the password used to encrypt the key.

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