var override string
	if SignatureAlgorithm(e) == SHA1WithRSA || SignatureAlgorithm(e) == ECDSAWithSHA1 {
		override = " (temporarily override with GODEBUG=x509sha1=1)"
	}
	return fmt.Sprintf("x509: cannot verify signature: insecure algorithm %v", SignatureAlgorithm(e)) + override
}

// ConstraintViolationError results when a requested usage is not permitted by
// a certificate. For example: checking a signature when the public key isn't a

}

// typeAndHashFromSignatureScheme returns the corresponding signature type and
// crypto.Hash for a given TLS SignatureScheme.
func typeAndHashFromSignatureScheme(signatureAlgorithm SignatureScheme) (sigType uint8, hash crypto.Hash, err error) {
	switch signatureAlgorithm {
	case PKCS1WithSHA1, PKCS1WithSHA256, PKCS1WithSHA384, PKCS1WithSHA512:
		sigType = signaturePKCS1v15
	case PSSWithSHA256, PSSWithSHA384, PSSWithSHA512:

	}

	var signatureAlgorithm SignatureScheme
	var sigType uint8
	var sigHash crypto.Hash
	if ka.version >= VersionTLS12 {
		signatureAlgorithm, err = selectSignatureScheme(ka.version, cert, clientHello.supportedSignatureAlgorithms)
		if err != nil {
			return nil, err
		}
		sigType, sigHash, err = typeAndHashFromSignatureScheme(signatureAlgorithm)
		if err != nil {
			return nil, err
		}

        issuer = subject
      }
      val signatureAlgorithm = signatureAlgorithm(issuerKeyPair)

      // Subset of certificate data that's covered by the signature.
      val tbsCertificate =
        TbsCertificate(
          // v3:
          version = 2L,
          serialNumber = serialNumber ?: BigInteger.ONE,
          signature = signatureAlgorithm,
          issuer = issuer,
          validity = validity(),

      Adapters.BIT_STRING,
      decompose = {
        listOf(
          it.tbsCertificate,
          it.signatureAlgorithm,
          it.signatureValue,
        )
      },
      construct = {
        Certificate(
          tbsCertificate = it[0] as TbsCertificate,
          signatureAlgorithm = it[1] as AlgorithmIdentifier,
          signatureValue = it[2] as BitString,
        )
      },
    )

				t.Fatalf("Failed to parse generated CRL: %s", err)
			}

			if tc.template.SignatureAlgorithm != UnknownSignatureAlgorithm &&
				parsedCRL.SignatureAlgorithm != tc.template.SignatureAlgorithm {
				t.Fatalf("SignatureAlgorithm mismatch: got %v; want %v.", parsedCRL.SignatureAlgorithm,
					tc.template.SignatureAlgorithm)
			}

			if len(tc.template.RevokedCertificates) > 0 {

			csrTemplate: &x509.CertificateRequest{
				SignatureAlgorithm: x509.SHA256WithRSA,
				DNSNames:           []string{"name_in_csr"},
				Version:            3,
			},
		},
		{
			name:       "Two subject IDs",
			subjectIDs: []string{"spiffe://test.com/abc/def", "test.com"},
			signeeKey:  rsaSigneeKey,
			csrTemplate: &x509.CertificateRequest{
				SignatureAlgorithm: x509.SHA256WithRSA,

	if err != nil {
		return nil, fmt.Errorf("failed to create signer: %v", err)
	}

	return signer, nil
}

func signerFromECDSAPrivateKey(keyPair *ecdsa.PrivateKey) (jose.Signer, error) {
	var alg jose.SignatureAlgorithm
	switch keyPair.Curve {
	case elliptic.P256():
		alg = jose.ES256
	case elliptic.P384():
		alg = jose.ES384
	case elliptic.P521():
		alg = jose.ES512
	default:

                    unusedBitsCount = 0,
                  ),
              ),
            issuerUniqueID = null,
            subjectUniqueID = null,
            extensions = listOf(),
          ),
        signatureAlgorithm =
          AlgorithmIdentifier(
            algorithm = SHA256_WITH_RSA_ENCRYPTION,
            parameters = null,
          ),
        signatureValue =
          BitString(

import okio.Buffer
import okio.ByteString
import org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement

internal data class Certificate(
  val tbsCertificate: TbsCertificate,
  val signatureAlgorithm: AlgorithmIdentifier,
  val signatureValue: BitString,
) {
  val commonName: Any?
    get() {
      return tbsCertificate.subject
        .flatten()