| /* asn1Decoding.c --- program to generate an ASN1 type from a DER coding. |
| * Copyright (C) 2002-2021 Free Software Foundation, Inc. |
| * |
| * 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/>. |
| * |
| */ |
| |
| #include <config.h> |
| |
| #include <stdio.h> |
| #include <string.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <getopt.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| |
| #include <libtasn1.h> |
| |
| #include "benchmark.h" |
| |
| #include "progname.h" |
| #include "read-file.h" |
| #include "version-etc.h" |
| |
| static int decode (asn1_node definitions, const char *typeName, void *der, |
| int der_len, int benchmark, int strict); |
| |
| /* This feature is available in gcc versions 2.5 and later. */ |
| #if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 5) |
| # define ATTR_NO_RETRUN |
| #else |
| # define ATTR_NO_RETRUN __attribute__ ((__noreturn__)) |
| #endif |
| |
| ATTR_NO_RETRUN static void |
| usage (int status) |
| { |
| if (status != EXIT_SUCCESS) |
| fprintf (stderr, "Try `%s --help' for more information.\n", program_name); |
| else |
| { |
| printf ("\ |
| Usage: %s [OPTION] DEFINITIONS ENCODED ASN1TYPE\n", program_name); |
| printf ("\ |
| Decodes DER data in ENCODED file, for the ASN1TYPE element\n\ |
| described in ASN.1 DEFINITIONS file, and print decoded structures.\n\ |
| \n"); |
| printf ("\ |
| -b, --benchmark perform a benchmark on decoding\n\ |
| -s, --strict use strict DER decoding\n\ |
| -t, --no-time-strict use strict DER decoding but not in time fields\n\ |
| -h, --help display this help and exit\n\ |
| -v, --version output version information and exit\n"); |
| emit_bug_reporting_address (); |
| } |
| exit (status); |
| } |
| |
| int |
| main (int argc, char *argv[]) |
| { |
| static const struct option long_options[] = { |
| {"help", no_argument, 0, 'h'}, |
| {"strict", no_argument, 0, 's'}, |
| {"no-time-strict", no_argument, 0, 't'}, |
| {"debug", no_argument, 0, 'd'}, |
| {"benchmark", no_argument, 0, 'b'}, |
| {"version", no_argument, 0, 'v'}, |
| {0, 0, 0, 0} |
| }; |
| int option_index = 0; |
| int option_result; |
| char *inputFileAsnName = NULL; |
| char *inputFileDerName = NULL; |
| char *typeName = NULL; |
| asn1_node definitions = NULL; |
| char errorDescription[ASN1_MAX_ERROR_DESCRIPTION_SIZE]; |
| int asn1_result = ASN1_SUCCESS; |
| unsigned char *der; |
| int der_len = 0, benchmark = 0; |
| int flags = 0, debug = 0; |
| /* FILE *outputFile; */ |
| |
| set_program_name (argv[0]); |
| |
| opterr = 0; /* disable error messages from getopt */ |
| |
| while (1) |
| { |
| |
| option_result = |
| getopt_long (argc, argv, "hbdsvtc", long_options, &option_index); |
| |
| if (option_result == -1) |
| break; |
| |
| switch (option_result) |
| { |
| case 'h': /* HELP */ |
| usage (EXIT_SUCCESS); |
| break; |
| case 'b': |
| benchmark = 1; |
| break; |
| case 'd': |
| debug = 1; |
| break; |
| case 's': |
| case 't': |
| flags |= ASN1_DECODE_FLAG_STRICT_DER; |
| if (option_result == 't') |
| flags |= ASN1_DECODE_FLAG_ALLOW_INCORRECT_TIME; |
| break; |
| case 'v': /* VERSION */ |
| version_etc (stdout, program_name, PACKAGE, VERSION, |
| "Fabio Fiorina", NULL); |
| exit (0); |
| break; |
| case '?': /* UNKNOW OPTION */ |
| fprintf (stderr, |
| "asn1Decoding: option '%s' not recognized or without argument.\n\n", |
| argv[optind - 1]); |
| usage (EXIT_FAILURE); |
| break; |
| default: |
| fprintf (stderr, |
| "asn1Decoding: ?? getopt returned character code Ox%x ??\n", |
| (unsigned) option_result); |
| } |
| } |
| |
| if (optind == argc || optind == argc - 1 || optind == argc - 2) |
| { |
| fprintf (stderr, "asn1Decoding: input files or ASN.1 type " |
| "name missing\n"); |
| usage (EXIT_FAILURE); |
| } |
| |
| inputFileAsnName = strdup (argv[optind]); |
| inputFileDerName = strdup (argv[optind + 1]); |
| typeName = strdup (argv[optind + 2]); |
| |
| if (!(inputFileAsnName && inputFileDerName && typeName)) |
| { |
| fprintf (stderr, "allocation failed\n"); |
| free (inputFileAsnName); |
| free (inputFileDerName); |
| free (typeName); |
| exit (1); |
| } |
| |
| asn1_result = |
| asn1_parser2tree (inputFileAsnName, &definitions, errorDescription); |
| |
| switch (asn1_result) |
| { |
| case ASN1_SUCCESS: |
| fprintf (stderr, "Parse: done.\n"); |
| break; |
| case ASN1_FILE_NOT_FOUND: |
| fprintf (stderr, "asn1Decoding: FILE %s NOT FOUND\n", inputFileAsnName); |
| break; |
| case ASN1_SYNTAX_ERROR: |
| case ASN1_IDENTIFIER_NOT_FOUND: |
| case ASN1_NAME_TOO_LONG: |
| fprintf (stderr, "asn1Decoding: %s\n", errorDescription); |
| break; |
| default: |
| fprintf (stderr, "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_file (inputFileDerName, RF_BINARY, &tmplen); |
| der_len = tmplen; |
| } |
| |
| /* read_binary_file() returns a buffer with more data than required, |
| * with this reallocation we ensure that memory accesses outside the |
| * boundaries are detected */ |
| if (der != NULL && debug != 0) |
| der = realloc (der, der_len); |
| |
| if (der == NULL) |
| { |
| fprintf (stderr, "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); |
| */ |
| |
| if (decode (definitions, typeName, der, der_len, benchmark, flags) != |
| ASN1_SUCCESS) |
| { |
| asn1_delete_structure (&definitions); |
| free (inputFileAsnName); |
| free (inputFileDerName); |
| free (typeName); |
| free (der); |
| exit (1); |
| } |
| |
| asn1_delete_structure (&definitions); |
| |
| free (der); |
| |
| free (inputFileAsnName); |
| free (inputFileDerName); |
| free (typeName); |
| |
| if (asn1_result != ASN1_SUCCESS) |
| exit (1); |
| |
| exit (0); |
| } |
| |
| static int |
| simple_decode (asn1_node definitions, const char *typeName, void *der, |
| int der_len, int benchmark, int flags) |
| { |
| |
| int asn1_result; |
| asn1_node structure = NULL; |
| char errorDescription[ASN1_MAX_ERROR_DESCRIPTION_SIZE]; |
| |
| asn1_result = asn1_create_element (definitions, typeName, &structure); |
| |
| /* asn1_print_structure(stdout,structure,"",ASN1_PRINT_ALL); */ |
| |
| |
| if (asn1_result != ASN1_SUCCESS) |
| { |
| fprintf (stderr, "Structure creation: %s\n", |
| asn1_strerror (asn1_result)); |
| asn1_delete_structure (&structure); |
| return asn1_result; |
| } |
| |
| if (flags != 0) |
| asn1_result = |
| asn1_der_decoding2 (&structure, der, &der_len, flags, errorDescription); |
| else |
| asn1_result = |
| asn1_der_decoding (&structure, der, der_len, errorDescription); |
| |
| if (!benchmark) |
| fprintf (stderr, "\nDecoding: %s\n", asn1_strerror (asn1_result)); |
| if (asn1_result != ASN1_SUCCESS) |
| { |
| fprintf (stderr, "asn1Decoding: %s\n", errorDescription); |
| asn1_delete_structure (&structure); |
| return asn1_result; |
| } |
| |
| if (!benchmark) |
| { |
| fprintf (stderr, "\nDECODING RESULT:\n"); |
| asn1_print_structure (stdout, structure, "", |
| ASN1_PRINT_NAME_TYPE_VALUE); |
| } |
| asn1_delete_structure (&structure); |
| return ASN1_SUCCESS; |
| } |
| |
| static int |
| decode (asn1_node definitions, const char *typeName, void *der, int der_len, |
| int benchmark, int flags) |
| { |
| struct benchmark_st st; |
| |
| if (benchmark == 0) |
| return simple_decode (definitions, typeName, der, der_len, benchmark, |
| flags); |
| else |
| { |
| start_benchmark (&st); |
| |
| do |
| { |
| simple_decode (definitions, typeName, der, der_len, benchmark, |
| flags); |
| st.size++; |
| } |
| while (benchmark_must_finish == 0); |
| |
| stop_benchmark (&st, "structures"); |
| fprintf (stdout, "\n"); |
| |
| } |
| return ASN1_SUCCESS; |
| } |