Function httpCredentialsString

cups/tls-gnutls.c:648–701

 */

size_t					/* O - Total size of credentials string */
httpCredentialsString(
    cups_array_t *credentials,		/* I - Credentials */
    char         *buffer,		/* I - Buffer or @code NULL@ */
    size_t       bufsize)		/* I - Size of buffer */
{
  http_credential_t	*first;		/* First certificate */
  gnutls_x509_crt_t	cert;		/* Certificate */


  DEBUG_printf(("httpCredentialsString(credentials=%p, buffer=%p, bufsize=" CUPS_LLFMT ")", credentials, buffer, CUPS_LLCAST bufsize));

  if (!buffer)
    return (0);

  if (bufsize > 0)
    *buffer = '\0';

  if ((first = (http_credential_t *)cupsArrayFirst(credentials)) != NULL &&
      (cert = http_gnutls_create_credential(first)) != NULL)
  {
    char		name[256],	/* Common name associated with cert */
			issuer[256];	/* Issuer associated with cert */
    size_t		len;		/* Length of string */
    time_t		expiration;	/* Expiration date of cert */
    int			sigalg;	/* Signature algorithm */
    unsigned char	md5_digest[16];	/* MD5 result */

    len = sizeof(name) - 1;
    if (gnutls_x509_crt_get_dn_by_oid(cert, GNUTLS_OID_X520_COMMON_NAME, 0, 0, name, &len) >= 0)
      name[len] = '\0';
    else
      strlcpy(name, "unknown", sizeof(name));

    len = sizeof(issuer) - 1;
    if (gnutls_x509_crt_get_issuer_dn_by_oid(cert, GNUTLS_OID_X520_ORGANIZATION_NAME, 0, 0, issuer, &len) >= 0)
      issuer[len] = '\0';
    else
      strlcpy(issuer, "unknown", sizeof(issuer));

    expiration = gnutls_x509_crt_get_expiration_time(cert);
    sigalg     = gnutls_x509_crt_get_signature_algorithm(cert);

    cupsHashData("md5", first->data, first->datalen, md5_digest, sizeof(md5_digest));

    snprintf(buffer, bufsize, "%s (issued by %s) / %s / %s / %02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X", name, issuer, httpGetDateString(expiration), gnutls_sign_get_name((gnutls_sign_algorithm_t)sigalg), md5_digest[0], md5_digest[1], md5_digest[2], md5_digest[3], md5_digest[4], md5_digest[5], md5_digest[6], md5_digest[7], md5_digest[8], md5_digest[9], md5_digest[10], md5_digest[11], md5_digest[12], md5_digest[13], md5_digest[14], md5_digest[15]);

    gnutls_x509_crt_deinit(cert);
  }

  DEBUG_printf(("1httpCredentialsString: Returning \"%s\".", buffer));

  return (strlen(buffer));
}


/*