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/*
* Copyright (C) 2006, 2007, 2008, 2009 Free Software Foundation
* Copyright (C) 2002 Fabio Fiorina
*
* This file is part of LIBTASN1.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
/*****************************************************/
/* File: asn1Deoding.c */
/* Description: program to generate an ASN1 type from*/
/* a DER coding. */
/*****************************************************/
#include <config.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <getopt.h>
#include <libtasn1.h>
#include <progname.h>
#include <version-etc.h>
#include <read-file.h>
static const char help_man[] =
"Usage: asn1Decoding [OPTION] DEFINITIONS ENCODED ASN1TYPE\n"
"asn1Decoding decodes DER data in ENCODED file, for the ASN1TYPE element\n"
"described in ASN.1 DEFINITIONS file, and print decoded structures.\n"
"\n"
" -c, --check checks the syntax only\n"
" -h, --help display this help and exit\n"
" -v, --version output version information and exit.\n"
"\n"
"Report bugs to <" PACKAGE_BUGREPORT ">.";
/********************************************************/
/* Function : main */
/* Description: */
/********************************************************/
int
main(int argc,char *argv[])
{
static struct option long_options[] =
{
{"help", no_argument, 0, 'h'},
{"version", no_argument, 0, 'v'},
{"check", no_argument, 0, 'c'},
{0, 0, 0, 0}
};
int option_index = 0;
int option_result;
char *inputFileAsnName=NULL;
char *inputFileDerName=NULL;
char *typeName=NULL;
int checkSyntaxOnly=0;
ASN1_TYPE definitions=ASN1_TYPE_EMPTY;
ASN1_TYPE structure=ASN1_TYPE_EMPTY;
char errorDescription[ASN1_MAX_ERROR_DESCRIPTION_SIZE];
int asn1_result=ASN1_SUCCESS;
unsigned char *der;
int der_len=0;
/* FILE *outputFile; */
set_program_name (argv[0]);
opterr=0; /* disable error messages from getopt */
while(1){
option_result=getopt_long(argc,argv,"hvc",long_options,&option_index);
if(option_result == -1) break;
switch(option_result){
case 'h': /* HELP */
printf("%s\n",help_man);
exit(0);
break;
case 'v': /* VERSION */
version_etc (stdout, program_name, PACKAGE, VERSION,
"Fabio Fiorina", NULL);
exit(0);
break;
case 'c': /* CHECK SYNTAX */
checkSyntaxOnly = 1;
break;
case '?': /* UNKNOW OPTION */
fprintf(stderr,"asn1Decoding: option '%s' not recognized or without argument.\n\n",argv[optind-1]);
printf("%s\n",help_man);
exit(1);
break;
default:
fprintf(stderr,"asn1Decoding: ?? getopt returned character code Ox%x ??\n",option_result);
}
}
if(optind == argc){
fprintf(stderr,"asn1Decoding: input file with ASN1 definitions missing.\n");
fprintf(stderr," input file with DER coding missing.\n");
fprintf(stderr," ASN1 type name missing.\n\n");
printf("%s\n",help_man);
exit(1);
}
if(optind == argc-1){
fprintf(stderr,"asn1Decoding: input file with DER coding missing.\n\n");
fprintf(stderr," ASN1 type name missing.\n\n");
printf("%s\n",help_man);
exit(1);
}
if(optind == argc-2){
fprintf(stderr,"asn1Decoding: ASN1 type name missing.\n\n");
printf("%s\n",help_man);
exit(1);
}
inputFileAsnName=(char *)malloc(strlen(argv[optind])+1);
strcpy(inputFileAsnName,argv[optind]);
inputFileDerName=(char *)malloc(strlen(argv[optind+1])+1);
strcpy(inputFileDerName,argv[optind+1]);
typeName=(char *)malloc(strlen(argv[optind+2])+1);
strcpy(typeName,argv[optind+2]);
asn1_result=asn1_parser2tree(inputFileAsnName,&definitions,errorDescription);
switch(asn1_result){
case ASN1_SUCCESS:
printf("Parse: done.\n");
break;
case ASN1_FILE_NOT_FOUND:
printf("asn1Decoding: FILE %s NOT FOUND\n",inputFileAsnName);
break;
case ASN1_SYNTAX_ERROR:
case ASN1_IDENTIFIER_NOT_FOUND:
case ASN1_NAME_TOO_LONG:
printf("asn1Decoding: %s\n",errorDescription);
break;
default:
printf("libtasn1 ERROR: %s\n",asn1_strerror(asn1_result));
}
if(asn1_result != ASN1_SUCCESS){
free(inputFileAsnName);
free(inputFileDerName);
free(typeName);
exit(1);
}
{
size_t tmplen;
der = (unsigned char*) read_binary_file (inputFileDerName, &tmplen);
der_len = tmplen;
}
if(der==NULL){
printf("asn1Decoding: could not read '%s'\n",inputFileDerName);
asn1_delete_structure(&definitions);
free(inputFileAsnName);
free(inputFileDerName);
free(typeName);
exit(1);
}
/*****************************************/
/* ONLY FOR TEST */
/*****************************************/
/*
der_len=0;
outputFile=fopen("data.p12","w");
while(fscanf(inputFile,"%c",der+der_len) != EOF){
if((der_len>=0x11) && (der_len<=(0xe70)))
fprintf(outputFile,"%c",der[der_len]);
der_len++;
}
fclose(outputFile);
fclose(inputFile);
*/
asn1_result=asn1_create_element(definitions,typeName,&structure);
/* asn1_print_structure(stdout,structure,"",ASN1_PRINT_ALL); */
if(asn1_result != ASN1_SUCCESS){
printf("Structure creation: %s\n",asn1_strerror(asn1_result));
asn1_delete_structure(&definitions);
free(inputFileAsnName);
free(inputFileDerName);
free(typeName);
free(der);
exit(1);
}
asn1_result=asn1_der_decoding(&structure,der,der_len,errorDescription);
printf("\nDecoding: %s\n",asn1_strerror(asn1_result));
if(asn1_result != ASN1_SUCCESS)
printf("asn1Decoding: %s\n",errorDescription);
printf("\nDECODING RESULT:\n");
asn1_print_structure(stdout,structure,"",ASN1_PRINT_NAME_TYPE_VALUE);
/*****************************************/
/* ONLY FOR TEST */
/*****************************************/
/*
der_len=10000;
option_index=0;
asn1_result=asn1_read_value(structure,"?2.content",der,&der_len);
outputFile=fopen("encryptedData.p12","w");
while(der_len>0){
fprintf(outputFile,"%c",der[option_index]);
der_len--;
option_index++;
}
fclose(outputFile);
*/
asn1_delete_structure(&definitions);
asn1_delete_structure(&structure);
free(der);
free(inputFileAsnName);
free(inputFileDerName);
free(typeName);
if(asn1_result != ASN1_SUCCESS)
exit(1);
exit(0);
}
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