package pem

import (
	"crypto"
	"crypto/x509"
	"encoding/pem"
)

// Encodex509CertAsPem converts an x509 certificate to a PEM encoded block
func Encodex509CertAsPem(x509CertBytes []byte) []byte {
	block := pem.Block{
		Type:  "CERTIFICATE",
		Bytes: x509CertBytes,
	}
	encodedCert := pem.EncodeToMemory(&block)
	return encodedCert
}

// Utility for obtaining an *x509.Certificate from PEM-encoded bytes
func GetCertFromPemFile(certBytes []byte) (*x509.Certificate, error) {
	cpb, _ := pem.Decode(certBytes)
	cert, err := x509.ParseCertificate(cpb.Bytes)

	if err != nil {
		return nil, err
	}

	return cert, nil
}

// Utility for obtaining a crypto.Signer from a file containing a PEM-encoded private key
func GetKeySignerFromPemFile(keyBytes []byte) (crypto.Signer, error) {
	ckb, _ := pem.Decode(keyBytes)
	key, err := x509.ParsePKCS1PrivateKey(ckb.Bytes)

	if err != nil {
		return nil, err
	}

	return key, nil
}