util.c

IBM的Linux上的PKCS#11实现

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*/

/* (C) COPYRIGHT International Business Machines Corp. 2001          */


// File:  util.c
//
// Generic utility routines
//    * linked-list managment
//
#include <pthread.h>
#if defined(LEEDS_BUILD)
  #include <stdio.h>
  #include <stdlib.h>

  #include "pkcs11types.h"
#ifdef PKCS64
  #include "pkcs32.h"
#endif
  #include "defs.h"
  #include "h_extern.h"

#define CK_ULONG_32  CK_ULONG
#define CK_SSL3_MASTER_KEY_DERIVE_PARAMS_32 CK_SSL3_MASTER_KEY_DERIVE_PARAMS
#endif

// Routine to get the mechanism parameters length properly
// adjusted.... Some mechs with structures as parameters need 
// to have their structures re-cast to 32bit values, but we
// will address these if they ever are supported.
CK_ULONG_32
get_mech_parameter_len(CK_MECHANISM_PTR  pMech)
{
   switch (pMech->mechanism){
      // Mechanisms wich have parameters of type CK_MAC_GENERAL_PARAMS
      case CKM_MD5_HMAC_GENERAL: 
      case CKM_SHA_1_HMAC_GENERAL: 
      case CKM_SSL3_MD5_MAC:
      case CKM_SSL3_SHA1_MAC:
         {
	// These are 32 bit numbers really in 64Bit so we
	// recase the answer.
         return(sizeof(CK_ULONG_32));
         break;
         }
      case CKM_SSL3_KEY_AND_MAC_DERIVE:
         return (sizeof(CK_SSL3_KEY_MAT_PARAMS));
         break;
      case CKM_SSL3_MASTER_KEY_DERIVE:
         return (sizeof(CK_SSL3_MASTER_KEY_DERIVE_PARAMS_32));
         break;
      default:
         return (pMech->ulParameterLen);
   }
}


#ifdef _BIG_ENDIAN
// Routine to adjust mechanism parameters for endianness
// Takes the mechanism, and if it needs adjustment then
// it will allocate a new parameter block, copy the
// data and adjust it for each mechanism.  Returning the
// adjusted data.  User MUST free the memory if the
// returned value is not NULL.
CK_VOID_PTR 
adjust_mech_parameter(CK_MECHANISM_PTR  pMech)
{
   switch (pMech->mechanism){
      // Mechanisms wich have parameters of type CK_MAC_GENERAL_PARAMS
      case CKM_MD5_HMAC_GENERAL: 
      case CKM_SHA_1_HMAC_GENERAL: 
      case CKM_SSL3_MD5_MAC:
      case CKM_SSL3_SHA1_MAC:
         {
#if __64BIT__
            CK_MAC_GENERAL_PARAMS_PTR_32  nptr;
#else
            CK_MAC_GENERAL_PARAMS_PTR  nptr;
#endif
            CK_MAC_GENERAL_PARAMS  *ptr;

            ptr = (CK_MAC_GENERAL_PARAMS *)pMech->pParameter;
#if __64BIT__
            nptr = (CK_MAC_GENERAL_PARAMS_PTR_32)malloc(sizeof(CK_MAC_GENERAL_PARAMS_32));
#else
            nptr = (CK_MAC_GENERAL_PARAMS_PTR)malloc((long)sizeof(CK_MAC_GENERAL_PARAMS));
#endif
            // What does one do if malloc fails here....  For now we assume all
            // is ok.
            *nptr = long_reverse((CK_ULONG)*ptr);
            return nptr;

         break;
         }
#if __64BIT__
      case CKM_SSL3_PRE_MASTER_KEY_GEN:
         {
         VERSION  *nptr;
         nptr = (VERSION *)malloc(sizeof(VERSION));
         return nptr;
         }
         break;
#endif
      default:
            return NULL;  // Not one of the mechanisms which needs adjusting
   }
}

#else
CK_VOID_PTR 
adjust_mech_parameter(CK_MECHANISM_PTR  pMech)
{
   return NULL;  // no endian junk going on here
}
#endif