prikeyinfo.c

IBE是一种非对称密码技术

/* Copyright 2003-2006, Voltage Security, all rights reserved.
 */

#include "vibe.h"
#include "environment.h"
#include "base.h"
#include "libctx.h"
#include "prikeyder.h"
#include "derhelp.h"
#include "errorctx.h"

/* Set up the OpenSSL ASN.1 template.
 */
ASN1_SEQUENCE (Asn1PrivateKeyInfo) =
{
  ASN1_SIMPLE (Asn1PrivateKeyInfo, version, ASN1_INTEGER),
  ASN1_SIMPLE (Asn1PrivateKeyInfo, algId, Asn1AlgorithmId),
  ASN1_SIMPLE (Asn1PrivateKeyInfo, encodedKey, ASN1_OCTET_STRING),
  ASN1_OPT (Asn1PrivateKeyInfo, attributes, Asn1Encoded)
} ASN1_SEQUENCE_END (Asn1PrivateKeyInfo);

IMPLEMENT_ASN1_FUNCTIONS (Asn1PrivateKeyInfo)

int VoltEncodePrivateKeyInfoDer (
   VoltLibCtx *libCtx,
   unsigned char *oid,
   unsigned int oidLen,
   unsigned char *params,
   unsigned int paramsLen,
   unsigned char *encodedKey,
   unsigned int encodedKeyLen,
   unsigned char *keyDer,
   unsigned int bufferSize,
   unsigned int *keyDerLen
   )
{
  int status;
  unsigned char *temp;
  Asn1PrivateKeyInfo *priKeyInfo = (Asn1PrivateKeyInfo *)0;
  VOLT_DECLARE_FNCT_LINE (fnctLine) 

  do
  {
    /* Create the ASN.1 "object".
     */    
    status = VT_ERROR_MEMORY;
    VOLT_SET_FNCT_LINE (fnctLine)
    priKeyInfo = Asn1PrivateKeyInfo_new ();
    if (priKeyInfo == (Asn1PrivateKeyInfo *)0)
      break;

    /* Set the fields.
     */
    VOLT_SET_FNCT_LINE (fnctLine)
    if (ASN1_INTEGER_set (priKeyInfo->version, 0) != 1)
      break;
    VOLT_SET_FNCT_LINE (fnctLine)
    if (Asn1ObjectId_set (priKeyInfo->algId->oid, oid, oidLen) != 1)
      break;
    VOLT_SET_FNCT_LINE (fnctLine)
    if (Asn1Encoded_setCreate (
      &(priKeyInfo->algId->params), params, paramsLen) != 1)
      break;
    VOLT_SET_FNCT_LINE (fnctLine)
    if (ASN1_OCTET_STRING_set (
      priKeyInfo->encodedKey, encodedKey, encodedKeyLen) != 1)
      break;

    /* How big does the buffer need to be?
     */
    status = VT_ERROR_INVALID_INPUT;
    VOLT_SET_FNCT_LINE (fnctLine)
    *keyDerLen = i2d_Asn1PrivateKeyInfo (priKeyInfo, (unsigned char **)0);
    if (*keyDerLen == 0)
      break;

    status = VT_ERROR_BUFFER_TOO_SMALL;
    VOLT_SET_FNCT_LINE (fnctLine)
    if (bufferSize < *keyDerLen)
      break;

    /* Now encode into the buffer.
     */
    status = VT_ERROR_INVALID_INPUT;
    temp = keyDer;
    VOLT_SET_FNCT_LINE (fnctLine)
    *keyDerLen = i2d_Asn1PrivateKeyInfo (priKeyInfo, &temp);
    if (*keyDerLen == 0)
      break;

    status = 0;
  } while (0);

  if (priKeyInfo != (Asn1PrivateKeyInfo *)0)
    Asn1PrivateKeyInfo_free (priKeyInfo);

  VOLT_LOG_ERROR_COMPARE (
    status, (VtLibCtx)libCtx, status, VT_ERROR_TYPE_PRIMARY,
    fnctLine, "VoltEncodePrivateKeyInfoDer", (char *)0)

  return (status);
}

int VoltDecodePriKeyInfoCreate (
   VoltLibCtx *libCtx,
   unsigned char *encoding,
   unsigned int maxEncodingLen,
   Asn1PrivateKeyInfo **priKeyInfo
   )
{
  int status;
  Asn1PrivateKeyInfo *newPriKeyInfo = (Asn1PrivateKeyInfo *)0;
  unsigned char *temp;
  VOLT_DECLARE_FNCT_LINE (fnctLine) 

  do
  {
    /* Create the "object".
     */
    status = VT_ERROR_MEMORY;
    VOLT_SET_FNCT_LINE (fnctLine)
    newPriKeyInfo = Asn1PrivateKeyInfo_new ();
    if (newPriKeyInfo == (Asn1PrivateKeyInfo *)0)
      break;

    /* Decode.
     */
    status = VT_ERROR_UNKNOWN_BER;
    temp = encoding;
    VOLT_SET_FNCT_LINE (fnctLine)
    d2i_Asn1PrivateKeyInfo (&newPriKeyInfo, &temp, maxEncodingLen);

    /* Did it work?
     */
    if (newPriKeyInfo == (Asn1PrivateKeyInfo *)0)
      break;

    /* If successful, return the object.
     */
    *priKeyInfo = newPriKeyInfo;
    status = 0;
  } while (0);

  if (status == 0)
    return (0);

  /* If there was an error, destroy anything we created.
   */
  if (newPriKeyInfo != (Asn1PrivateKeyInfo *)0)
    Asn1PrivateKeyInfo_free (newPriKeyInfo);

  VOLT_LOG_ERROR_COMPARE (
    status, (VtLibCtx)libCtx, status, VT_ERROR_TYPE_PRIMARY,
    fnctLine, "VoltDecodePriKeyInfoCreate", (char *)0)

  return (status);
}