engines/ccgost/gostsum.c

   1 /**********************************************************************
   2  *                        gostsum.c                                   *
   3  *             Copyright (c) 2005-2006 Cryptocom LTD                  *
   4  *         This file is distributed under the same license as OpenSSL *
   5  *                                                                    *
   6  *        Almost drop-in replacement for md5sum and sha1sum           *
   7  *          which computes GOST R 34.11-94 hashsum instead            *
   8  *                                                                    *
   9  **********************************************************************/
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include <unistd.h>
  13 #include <limits.h>
  14 #include <fcntl.h>
  15 #include <string.h>
  16 #include "gosthash.h"
  17 #define BUF_SIZE 262144
  18 int hash_file(gost_hash_ctx *ctx,char *filename,char *sum,int mode);
  19 int hash_stream(gost_hash_ctx *ctx,int fd, char *sum);
  20 int get_line(FILE *f,char *hash,char *filename);
  21 void help()
  22 {
  23         fprintf(stderr,"gostsum [-bvt] [-c [file]]| [files]\n"
  24         "\t-c check message digests (default is generate)\n"
  25         "\t-v verbose, print file names when checking\n"
  26         "\t-b read files in binary mode\n"
  27         "\t-t use test GOST paramset (default is CryptoPro paramset)\n"
  28 "The input for -c should be the list of message digests and file names\n"
  29 "that is printed on stdout by this program when it generates digests.\n");
  30 exit(3);
  31 }
  32
  33 #ifndef O_BINARY
  34 #define O_BINARY 0
  35 #endif
  36
  37 int main(int argc,char **argv)
  38 {
  39         int c,i;
  40         int verbose=0;
  41         int errors=0;
  42         int open_mode = O_RDONLY;
  43         gost_subst_block *b=  &GostR3411_94_CryptoProParamSet;
  44         FILE *check_file = NULL;
  45         gost_hash_ctx ctx;
  46
  47         while( (c=getopt(argc,argv,"bc::tv"))!=-1)
  48         {
  49                 switch (c)
  50                 {
  51                 case 'v': verbose=1; break;
  52                 case 't': b= &GostR3411_94_TestParamSet; break;
  53                 case 'b': open_mode |= O_BINARY; break;
  54                 case 'c': if (optarg) {
  55                                         check_file = fopen(optarg,"r");
  56                                         if (!check_file) {
  57                                                 perror(optarg);
  58                                                 exit(2);
  59                                         }
  60                                   } else {
  61                                         check_file= stdin;
  62                                   }
  63                                   break;
  64                 default:
  65                                 fprintf(stderr,"invalid option %c",optopt);
  66                                 help();
  67                 }
  68         }
  69         init_gost_hash_ctx(&ctx,b);
  70         if (check_file)
  71         {
  72                 char inhash[65],calcsum[65],filename[PATH_MAX];
  73                 int failcount=0,count=0;;
  74                 if (check_file==stdin && optind<argc)
  75                 {
  76                         check_file=fopen(argv[optind],"r");
  77                         if (!check_file)
  78                         {
  79                                 perror(argv[optind]);
  80                                 exit(2);
  81                         }
  82             }
  83                 while (get_line(check_file,inhash,filename))
  84                 {
  85                         if (!hash_file(&ctx,filename,calcsum,open_mode)) {
  86                                 exit (2);
  87                         }
  88                         count++;
  89                         if (!strncmp(calcsum,inhash,65))
  90                         {
  91                                 if (verbose) {
  92                                         fprintf(stderr,"%s\tOK\n",filename);
  93                                 }
  94                         } else {
  95                                 if (verbose) {
  96                                         fprintf(stderr,"%s\tFAILED\n",filename);
  97                                 } else {
  98                                         fprintf(stderr,"%s: GOST hash sum check failed for '%s'\n",
  99                                                         argv[0],filename);
 100                                 }
 101                                 failcount++;
 102                         }
 103                 }
 104                 if (verbose && failcount) {
 105                         fprintf(stderr,"%s: %d of %d file(f) failed GOST hash sum check\n",
 106                                         argv[0],failcount,count);
 107                 }
 108                 exit (failcount?1:0);
 109         }
 110         if (optind==argc) {
 111                 char sum[65];
 112                 if (!hash_stream(&ctx,fileno(stdin),sum)) {
 113                         perror("stdin");
 114                         exit(1);
 115                 }
 116                 printf("%s -\n",sum);
 117                 exit(0);
 118         }
 119         for (i=optind;i<argc;i++) {
 120                 char sum[65];
 121                 if (!hash_file(&ctx,argv[i],sum,open_mode)) {
 122                         errors++;
 123                 } else {
 124                         printf("%s %s\n",sum,argv[i]);
 125                 }
 126         }
 127         exit(errors?1:0);
 128 }
 129
 130 int hash_file(gost_hash_ctx *ctx,char *filename,char *sum,int mode)
 131 {
 132         int fd;
 133         if ((fd=open(filename,mode))<0) {
 134                 perror(filename);
 135                 return 0;
 136         }
 137         if (!hash_stream(ctx,fd,sum)) {
 138                 perror(filename);
 139                 return 0;
 140         }
 141         close(fd);
 142         return 1;
 143 }
 144
 145 int hash_stream(gost_hash_ctx *ctx,int fd, char *sum)
 146 {
 147         unsigned char buffer[BUF_SIZE];
 148         ssize_t bytes;
 149         int i;
 150         start_hash(ctx);
 151         while ((bytes=read(fd,buffer,BUF_SIZE))>0) {
 152                 hash_block(ctx,buffer,bytes);
 153         }
 154         if (bytes<0) {
 155                 return 0;
 156         }
 157         finish_hash(ctx,buffer);
 158         for (i=0;i<32;i++) {
 159           sprintf(sum+2*i,"%02x",buffer[31-i]);
 160         }
 161         return 1;
 162 }
 163
 164 int get_line(FILE *f,char *hash,char *filename) {
 165         int i;
 166         if (fread(hash,1,64,f)<64) return 0;
 167         hash[64]=0;
 168         for (i=0;i<64;i++)
 169         {
 170                 if (hash[i]<'0' || (hash[i]>'9' && hash[i]<'A') || (hash[i]>'F'
 171                     && hash[i]<'a')||hash[i]>'f')
 172                 {
 173                         fprintf(stderr,"Not a hash value '%s'\n",hash);
 174                         return 0;
 175                 }
 176         }
 177         if (fgetc(f)!=' ') {
 178                 fprintf(stderr,"Malformed input line\n");
 179                 return 0;
 180         }
 181         i=strlen(fgets(filename,PATH_MAX,f));
 182         while (filename[--i]=='\n'||filename[i]=='\r') filename[i]=0;
 183         return 1;
 184 }