pencode.c

来自「支持SSL v2/v3, TLS, PKCS #5, PKCS #7, PKCS」· C语言 代码 · 共 118 行

/* 
 * The contents of this file are subject to the Mozilla Public
 * License Version 1.1 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.mozilla.org/MPL/
 * 
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 * 
 * The Original Code is the Netscape security libraries.
 * 
 * The Initial Developer of the Original Code is Netscape
 * Communications Corporation.  Portions created by Netscape are 
 * Copyright (C) 1994-2000 Netscape Communications Corporation.  All
 * Rights Reserved.
 * 
 * Contributor(s):
 * 
 * Alternatively, the contents of this file may be used under the
 * terms of the GNU General Public License Version 2 or later (the
 * "GPL"), in which case the provisions of the GPL are applicable 
 * instead of those above.  If you wish to allow use of your 
 * version of this file only under the terms of the GPL and not to
 * allow others to use your version of this file under the MPL,
 * indicate your decision by deleting the provisions above and
 * replace them with the notice and other provisions required by
 * the GPL.  If you do not delete the provisions above, a recipient
 * may use your version of this file under either the MPL or the
 * GPL.
 */

#ifdef DEBUG
static const char CVS_ID[] = "@(#) $Source: /cvsroot/mozilla/security/nss/lib/pkix/src/AlgorithmIdentifier/PEncode.c,v $ $Revision: 1.1 $ $Date: 2000/03/31 19:07:04 $ $Name: NSS_3_1_1_RTM $";
#endif /* DEBUG */

#ifndef PKIX_H
#include "pkix.h"
#endif /* PKIX_H */

/*
 * nssPKIXAlgorithmIdentifier_Encode
 *
 * -- fgmr comments --
 *
 * The error may be one of the following values:
 *  NSS_ERROR_INVALID_PKIX_ALGORITHM_IDENTIFIER
 *  NSS_ERROR_INVALID_ARENA
 *  NSS_ERROR_NO_MEMORY
 *
 * Return value:
 *  A valid NSSBER pointer upon success
 *  NULL upon failure
 */

NSS_IMPLEMENT NSSBER *
nssPKIXAlgorithmIdentifier_Encode
(
  NSSPKIXAlgorithmIdentifier *algid,
  NSSASN1EncodingType encoding,
  NSSBER *rvOpt,
  NSSArena *arenaOpt
)
{

#ifdef NSSDEBUG
  if( PR_SUCCESS != nssPKIXAlgorithmIdentifier_verifyPointer(algid) ) {
    return (NSSBER *)NULL;
  }

  if( (NSSArena *)NULL != arenaOpt ) {
    if( PR_SUCCESS != nssArena_verifyPointer(arenaOpt) ) {
      return (NSSBER *)NULL;
    }
  }
#endif /* NSSDEBUG */

  switch( encoding ) {
  case NSSASN1BER:
    if( (NSSBER *)NULL != algid->ber ) {
      it = algid->ber;
      goto done;
    }
    /*FALLTHROUGH*/
  case NSSASN1DER:
    if( (NSSDER *)NULL != algid->der ) {
      it = algid->der;
      goto done;
    }
    break;
  default:
    nss_SetError(NSS_ERROR_UNSUPPORTED_ENCODING);
    return (NSSBER *)NULL;
  }

  it = nssASN1_EncodeItem(algid->arena, (NSSItem *)NULL, algid,
                          nssPKIXAlgorithmIdentifier_template, encoding);
  if( (NSSBER *)NULL == it ) {
    return (NSSBER *)NULL;
  }

  switch( encoding ) {
  case NSSASN1BER:
    algid->ber = it;
    break;
  case NSSASN1DER:
    algid->der = it;
    break;
  default:
    PR_ASSERT(0);
    break;
  }

 done:
  return nssItem_Duplicate(it, arenaOpt, rvOpt);
}