func parseRsaPrivateKey()

in pkg/cloud/azureclient.go [231:257]

• 23 lines of code
• 6 McCabe index (conditional complexity)

func parseRsaPrivateKey(path string) (*rsa.PrivateKey, error) {
	privateKeyData, err := os.ReadFile(path)
	if err != nil {
		return nil, err
	}

	block, _ := pem.Decode(privateKeyData)
	if block == nil {
		return nil, errors.New("Failed to decode a pem block from private key")
	}

	privatePkcs1Key, errPkcs1 := x509.ParsePKCS1PrivateKey(block.Bytes)
	if errPkcs1 == nil {
		return privatePkcs1Key, nil
	}

	privatePkcs8Key, errPkcs8 := x509.ParsePKCS8PrivateKey(block.Bytes)
	if errPkcs8 == nil {
		privatePkcs8RsaKey, ok := privatePkcs8Key.(*rsa.PrivateKey)
		if !ok {
			return nil, errors.New("pkcs8 contained non-RSA key. Expected RSA key")
		}
		return privatePkcs8RsaKey, nil
	}

	return nil, errors.Errorf("failed to parse private key as Pkcs#1 or Pkcs#8. (%s). (%s)", errPkcs1, errPkcs8)
}