

#include <global.h>
#include <my_sys.h>
#include <vio.h>

#ifdef HAVE_OPENSSL

static bool     ssl_algorithms_added    = FALSE;
static bool     ssl_error_strings_loaded= FALSE;
static int      verify_depth = 0;
static int      verify_error = X509_V_OK;


static void
report_errors()
{
  unsigned long	l;
  const char*	file;
  const char*	data;
  int		line,flags;

  DBUG_ENTER("report_errors");

  while ((l=ERR_get_error_line_data(&file,&line,&data,&flags)) != 0)
  {
    char buf[200];
    DBUG_PRINT("error", ("OpenSSL: %s:%s:%d:%s\n", ERR_error_string(l,buf),
			 file,line,(flags&ERR_TXT_STRING)?data:"")) ;
  }
  DBUG_VOID_RETURN;
}


static int
vio_set_cert_stuff(SSL_CTX *ctx, const char *cert_file, const char *key_file)
{
  DBUG_ENTER("vio_set_cert_stuff");
  DBUG_PRINT("enter", ("ctx=%p, cert_file=%p, key_file=%p",
		       ctx, cert_file, key_file));
  if (cert_file != NULL)
  {
    if (SSL_CTX_use_certificate_file(ctx,cert_file,SSL_FILETYPE_PEM) <= 0)
    {
      DBUG_PRINT("error",("unable to get certificate from '%s'\n",cert_file));
      /* FIX stderr */
      ERR_print_errors_fp(stderr);
      DBUG_RETURN(0);
    }
    if (key_file == NULL)
      key_file = cert_file;
    if (SSL_CTX_use_PrivateKey_file(ctx,key_file,
				    SSL_FILETYPE_PEM) <= 0)
    {
      DBUG_PRINT("error", ("unable to get private key from '%s'\n",key_file));
      /* FIX stderr */
      ERR_print_errors_fp(stderr);
      DBUG_RETURN(0);
    }

    /* If we are using DSA, we can copy the parameters from
     * the private key */
    /* Now we know that a key and cert have been set against
     * the SSL context */
    if (!SSL_CTX_check_private_key(ctx))
    {
      DBUG_PRINT("error", ("Private key does not match the certificate public key\n"));
      DBUG_RETURN(0);
    }
  }
  DBUG_RETURN(1);
}


static int
vio_verify_callback(int ok, X509_STORE_CTX *ctx)
{
  char	buf[256];
  X509*	err_cert;
  int	err,depth;

  DBUG_ENTER("vio_verify_callback");
  DBUG_PRINT("enter", ("ok=%d, ctx=%p", ok, ctx));
  err_cert=X509_STORE_CTX_get_current_cert(ctx);
  err=	   X509_STORE_CTX_get_error(ctx);
  depth=   X509_STORE_CTX_get_error_depth(ctx);

  X509_NAME_oneline(X509_get_subject_name(err_cert),buf,sizeof(buf));
  if (!ok)
  {
    DBUG_PRINT("error",("verify error:num=%d:%s\n",err,
			X509_verify_cert_error_string(err)));
    if (verify_depth >= depth)
    {
      ok=1;
      verify_error=X509_V_OK;
    }
    else
    {
      ok=0;
      verify_error=X509_V_ERR_CERT_CHAIN_TOO_LONG;
    }
  }
  switch (ctx->error) {
  case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
    X509_NAME_oneline(X509_get_issuer_name(ctx->current_cert),buf,256);
    DBUG_PRINT("info",("issuer= %s\n",buf));
    break;
  case X509_V_ERR_CERT_NOT_YET_VALID:
  case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
    DBUG_PRINT("error", ("notBefore"));
    /*ASN1_TIME_print_fp(stderr,X509_get_notBefore(ctx->current_cert));*/
    break;
  case X509_V_ERR_CERT_HAS_EXPIRED:
  case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
    DBUG_PRINT("error", ("notAfter error"));
    /*ASN1_TIME_print_fp(stderr,X509_get_notAfter(ctx->current_cert));*/
    break;
  }
  DBUG_PRINT("exit", ("r=%d", ok));
  DBUG_RETURN(ok);
}


/************************ VioSSLConnectorFd **********************************/
struct st_VioSSLConnectorFd* new_VioSSLConnectorFd(const char* key_file,
				     const char* cert_file,
				     const char* ca_file,
				     const char* ca_path)
{
  int	verify = SSL_VERIFY_PEER;
  struct st_VioSSLConnectorFd* ptr;
  DBUG_ENTER("new_VioSSLConnectorFd");
  DBUG_PRINT("enter",
	     ("key_file=%s, cert_file=%s, ca_path=%s, ca_file=%s",
	      key_file, cert_file, ca_path, ca_file));
  ptr=(struct st_VioSSLConnectorFd*)my_malloc(sizeof(struct st_VioSSLConnectorFd),MYF(0));
  ptr->ssl_context_=0;
  ptr->ssl_method_=0;
  /* FIXME: constants! */

  if (!ssl_algorithms_added)
  {
    DBUG_PRINT("info", ("todo: SSLeay_add_ssl_algorithms()"));
    ssl_algorithms_added = TRUE;
    SSLeay_add_ssl_algorithms();
  }
  if (!ssl_error_strings_loaded)
  {
    DBUG_PRINT("info", ("todo:SSL_load_error_strings()"));
    ssl_error_strings_loaded = TRUE;
    SSL_load_error_strings();
  }
  ptr->ssl_method_ = SSLv3_client_method();
  ptr->ssl_context_ = SSL_CTX_new(ptr->ssl_method_);
  DBUG_PRINT("info", ("ssl_context_: %p",ptr->ssl_context_));
  if (ptr->ssl_context_ == 0)
  {
    DBUG_PRINT("error", ("SSL_CTX_new failed"));
    report_errors();
    goto ctor_failure;
  }
  /*
   * SSL_CTX_set_options
   * SSL_CTX_set_info_callback
   * SSL_CTX_set_cipher_list
   */
  SSL_CTX_set_verify(ptr->ssl_context_, verify, vio_verify_callback);
  if (vio_set_cert_stuff(ptr->ssl_context_, cert_file, key_file) == -1)
  {
    DBUG_PRINT("error", ("vio_set_cert_stuff failed"));
    report_errors();
    goto ctor_failure;
  }
  if (SSL_CTX_load_verify_locations( ptr->ssl_context_, ca_file,ca_path)==0)
  {
    DBUG_PRINT("warning", ("SSL_CTX_load_verify_locations failed"));
    if (SSL_CTX_set_default_verify_paths(ptr->ssl_context_)==0)
    {
      DBUG_PRINT("error", ("SSL_CTX_set_default_verify_paths failed"));
      report_errors();
      goto ctor_failure;
    }
  }
  DBUG_RETURN(ptr);
ctor_failure:
  DBUG_PRINT("exit", ("there was an error"));
  DBUG_VOID_RETURN;
}


/************************ VioSSLAcceptorFd **********************************/

struct st_VioSSLAcceptorFd*
new_VioSSLAcceptorFd(const char*	key_file,
				   const char*	cert_file,
				   const char*	ca_file,
				   const char*	ca_path)
{
  int	verify = (SSL_VERIFY_PEER			|
		  SSL_VERIFY_FAIL_IF_NO_PEER_CERT	|
		  SSL_VERIFY_CLIENT_ONCE);

  struct st_VioSSLAcceptorFd* ptr;
  DBUG_ENTER("new_VioSSLAcceptorFd");
  DBUG_PRINT("enter",
	     ("key_file=%s, cert_file=%s, ca_path=%s, ca_file=%s",
	      key_file, cert_file, ca_path, ca_file));

  ptr=(struct st_VioSSLAcceptorFd*)my_malloc(sizeof(struct st_VioSSLAcceptorFd),MYF(0));
  ptr->ssl_context_=0;
  ptr->ssl_method_=0;
  /* FIXME: constants! */
    ptr->session_id_context_ = ptr;

  if (!ssl_algorithms_added)
  {
    DBUG_PRINT("info", ("todo: SSLeay_add_ssl_algorithms()"));
    ssl_algorithms_added = TRUE;
    SSLeay_add_ssl_algorithms();
  }
  if (!ssl_error_strings_loaded)
  {
    DBUG_PRINT("info", ("todo: SSL_load_error_strings()"));
    ssl_error_strings_loaded = TRUE;
    SSL_load_error_strings();
  }
  ptr->ssl_method_ = SSLv3_server_method();
  ptr->ssl_context_ = SSL_CTX_new(ptr->ssl_method_);
  if (ptr->ssl_context_==0)
  {
    DBUG_PRINT("error", ("SSL_CTX_new failed"));
    report_errors();
    goto ctor_failure;
  }
  /*
   * SSL_CTX_set_quiet_shutdown(ctx,1);
   * 
   */
  SSL_CTX_sess_set_cache_size(ptr->ssl_context_,128);

  /* DH?
   */
  SSL_CTX_set_verify(ptr->ssl_context_, verify, vio_verify_callback);
  SSL_CTX_set_session_id_context(ptr->ssl_context_,(const uchar*)&(ptr->session_id_context_),sizeof(ptr->session_id_context_));

  /*
   * SSL_CTX_set_client_CA_list(ctx,SSL_load_client_CA_file(CAfile));
   */
  if (vio_set_cert_stuff(ptr->ssl_context_, cert_file, key_file) == -1)
  {
    DBUG_PRINT("error", ("vio_set_cert_stuff failed"));
    report_errors();
    goto ctor_failure;
  }
  if (SSL_CTX_load_verify_locations( ptr->ssl_context_, ca_file, ca_path)==0)
  {
    DBUG_PRINT("warning", ("SSL_CTX_load_verify_locations failed"));
    if (SSL_CTX_set_default_verify_paths(ptr->ssl_context_)==0)
    {
      DBUG_PRINT("error", ("SSL_CTX_set_default_verify_paths failed"));
      report_errors();
      goto ctor_failure;
    }
  }
  DBUG_RETURN(ptr);
ctor_failure:
  DBUG_PRINT("exit", ("there was an error"));
  DBUG_VOID_RETURN;
}


#endif /* HAVE_OPENSSL */



