diff --git a/hsm_utils/import_asymmetric_key.c b/hsm_utils/import_asymmetric_key.c
index 53d3c55..75bb9ae 100644
--- a/hsm_utils/import_asymmetric_key.c
+++ b/hsm_utils/import_asymmetric_key.c
@@ -51,10 +51,6 @@ int sbn_bin2bignum ( struct NFast_Bignum **ppBN_out,
 
 void PrintArray( char *pStr, const unsigned char *pData, int length );
 
-int sbn_bin2bignum2 ( struct NFast_Bignum **ppBN_out,
-			struct NFast_Application *app, 
-			const unsigned char *bin, const int size );
-
 // bignum upcalls
 int my_bignumreceiveupcall(struct NFast_Application *app,
                                struct NFast_Call_Context *cctx,
@@ -194,122 +190,42 @@ int my_bignumformatupcall(struct NFast_Application *app,
   return Status_OK;
 }
 
-// almost copy sbn_char2bignum
+
+// bin データを NFastApp の BigNum データに変換する
 int sbn_bin2bignum ( struct NFast_Bignum **ppBN_out,
 			struct NFast_Application *app,
 			const unsigned char *bin, const int size )
 {
-  struct NFast_Bignum *pBN;
-  int d;
-  size_t len, i;
+	struct NFast_Bignum *pBN;
+	int d;
+	size_t len, i;
 
 	len = size;
 
-  if ( len > MAXBIGNUMBITS/4 ) return Status_OutOfRange;
+	if ( len > MAXBIGNUMBITS/4 ) return Status_OutOfRange;
 
-  //pBN = (struct NFast_Bignum *)NFastApp_Malloc(app, sizeof(struct NFast_Bignum), cctx, tctx);
-  pBN = (struct NFast_Bignum *)NFastApp_Malloc( app, sizeof(struct NFast_Bignum), NULL, NULL );
-  if ( !pBN ) return NOMEM;
+	pBN = (struct NFast_Bignum *)NFastApp_Malloc( app, sizeof(struct NFast_Bignum), NULL, NULL );
+	if ( !pBN ) return NOMEM;
 
-  pBN->msb_first = 0;
-  pBN->msw_first = 0;
+	pBN->msb_first = 0;
+	pBN->msw_first = 0;
 
-	//memcpy( pBN->bytes, bin, len );
 	for ( i = 0; i < len; i++ )
 		pBN->bytes[i] = bin[len-1-i];
-	
+
 	while ( (i & 3) != 0 )
 		pBN->bytes[i++] = 0;
-	
-	pBN->nbytes = i;
-	
-	*ppBN_out = pBN;
-	
-	//PrintArray( (char*)"bin2bn array", (const char*)pBN->bytes, pBN->nbytes );
-	
 
+	pBN->nbytes = i;
+
+	*ppBN_out = pBN;
 
 #if 0
-  /* Read in from the LS digit */
-  for ( i=0; i<len; i++ )
-  {
-    //d = char2hex(text[len-1-i]);
-    d = bin[ len-1-i ];
-    
-    // ???
-    if ( d < 0 ) return Status_Malformed;
-    if ( i & 1 )
-      pBN->bytes[i/2] |= (d << 4);
-    else
-      pBN->bytes[i/2] = d;
-  }
-
-  /* Pad to words if necessary */
-  i = (len+1)/2;
-  while ( (i & 3) != 0 )
-    pBN->bytes[i++] = 0;
-
-  assert(i <= INT_MAX);
-  pBN->nbytes=(int)i;
-  *ppBN_out=pBN;
+	PrintArray( (char*)"bin2bn array", (const char*)pBN->bytes, pBN->nbytes );
 #endif
 
-  return Status_OK;
-}
-
-int sbn_bin2bignum2 ( struct NFast_Bignum **ppBN_out,
-			struct NFast_Application *app, 
-			const unsigned char *bin, const int size )
-{
-  struct NFast_Bignum *pBN;
-  int d;
-  size_t len, i;
-
-  /* Strip leading whitespace */
-
-//  while ( text[0] != 0 && isspace((unsigned char)text[0]) )
-//    text++;
-
-  /* Strip trailing whitespace */
-//  len=strlen(text);
-//  while ( len > 0 && isspace((unsigned char)text[len-1]) )
-//    len--;
-
-	len = size;
-
-  if ( len > MAXBIGNUMBITS/4 ) return Status_OutOfRange;
-
-  pBN = (struct NFast_Bignum *)NFastApp_Malloc(app, sizeof(struct NFast_Bignum), NULL, NULL );
-  if ( !pBN ) return NOMEM;
-
-  pBN->msb_first = 0;
-  pBN->msw_first = 0;
-
-  /* Read in from the LS digit */
-  for ( i=0; i<len; i++ )
-  {
-    //d = char2hex(text[len-1-i]);
-    d = bin[len-1-i];
-    if ( d < 0 ) return Status_Malformed;
-    if ( i & 1 )
-      pBN->bytes[i/2] |= (d << 4);
-    else
-      pBN->bytes[i/2] = d;
-  }
-
-  /* Pad to words if necessary */
-  i = (len+1)/2;
-  while ( (i & 3) != 0 )
-    pBN->bytes[i++] = 0;
-
-  assert(i <= INT_MAX);
-  pBN->nbytes=(int)i;
-  *ppBN_out=pBN;
-  
-  //PrintArray( (char*)"bin2bn2 array", (const char*)pBN->bytes, pBN->nbytes );
-  
-  return Status_OK;
-}
+	return Status_OK;
+}	// sbn_bin2bignum
 
 void PrintArray( char *pStr, const unsigned char *pData, int length )
 {
@@ -755,7 +671,6 @@ int main( int argc, char *argv[] )
 		blobptr = &keyinfo->pubblob;
 	else
 	{
-		printf( "aes is symmetric key!\n" );
 		blobptr = &keyinfo->privblob;
 	}
 	
@@ -836,8 +751,8 @@ int main( int argc, char *argv[] )
 		cmd.cmd = Cmd_Decrypt;
 		cmd.args.decrypt.flags = 0;
 		cmd.args.decrypt.key = keyid;
-		cmd.args.decrypt.mech = Mech_RijndaelmCBCpNONE;
-		cmd.args.decrypt.cipher.mech = Mech_RijndaelmCBCpNONE;
+		cmd.args.decrypt.mech = Mech_RSApPKCS1;
+		cmd.args.decrypt.cipher.mech = Mech_RSApPKCS1;
 		cmd.args.decrypt.cipher.data.generic128.cipher = dec_input;
 		cmd.args.decrypt.cipher.iv = dec_iv.iv;
 		cmd.args.decrypt.reply_type = PlainTextType_Bytes;