crypto/x509: add Certificate.RawSignatureAlgorithm

// This program demonstrates the new RawSignatureAlgorithm field in
// crypto/x509.Certificate. It is not yet available in Go 1.27.1, so the
// program simply shows how the field would be used once the change ships.
package main

import (
	"crypto/x509"
	"fmt"
)

func main() {
	// A DER-encoded AlgorithmIdentifier for a hypothetical signature algorithm.
	// In practice this would come from parsing a real certificate.
	alg := []byte{0x30, 0x0a, 0x06, 0x08, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x0b}

	// Create a Certificate with the raw algorithm bytes set.
	cert := &x509.Certificate{
		RawSignatureAlgorithm: alg,
	}

	// Print the raw algorithm bytes to confirm the field is populated.
	fmt.Printf("RawSignatureAlgorithm: %x\n", cert.RawSignatureAlgorithm)
}