mirror of
https://github.com/guanzhi/GmSSL.git
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first commit, SM2-DSA only
This commit is contained in:
Zhi Guan
210
engines/ccgost/gostsum.c
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210
engines/ccgost/gostsum.c
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/**********************************************************************
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* gostsum.c *
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* Copyright (c) 2005-2006 Cryptocom LTD *
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* This file is distributed under the same license as OpenSSL *
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* *
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* Almost drop-in replacement for md5sum and sha1sum *
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* which computes GOST R 34.11-94 hashsum instead *
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* *
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**********************************************************************/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <limits.h>
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#include <fcntl.h>
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#include <string.h>
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#include "gosthash.h"
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#define BUF_SIZE 262144
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int hash_file(gost_hash_ctx *ctx,char *filename,char *sum,int mode);
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int hash_stream(gost_hash_ctx *ctx,int fd, char *sum);
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int get_line(FILE *f,char *hash,char *filename);
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void help()
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{
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fprintf(stderr,"gostsum [-bvt] [-c [file]]| [files]\n"
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"\t-c check message digests (default is generate)\n"
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"\t-v verbose, print file names when checking\n"
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"\t-b read files in binary mode\n"
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"\t-t use test GOST paramset (default is CryptoPro paramset)\n"
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"The input for -c should be the list of message digests and file names\n"
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"that is printed on stdout by this program when it generates digests.\n");
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exit(3);
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}
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#ifndef O_BINARY
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#define O_BINARY 0
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#endif
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int main(int argc,char **argv)
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{
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int c,i;
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int verbose=0;
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int errors=0;
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int open_mode = O_RDONLY;
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gost_subst_block *b= &GostR3411_94_CryptoProParamSet;
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FILE *check_file = NULL;
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gost_hash_ctx ctx;
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while( (c=getopt(argc,argv,"bc::tv"))!=-1)
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{
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switch (c)
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{
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case 'v': verbose=1; break;
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case 't': b= &GostR3411_94_TestParamSet; break;
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case 'b': open_mode |= O_BINARY; break;
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case 'c':
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if (optarg)
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{
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check_file = fopen(optarg,"r");
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if (!check_file)
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{
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perror(optarg);
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exit(2);
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}
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}
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else
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{
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check_file= stdin;
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}
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break;
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default:
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fprintf(stderr,"invalid option %c",optopt);
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help();
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}
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}
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init_gost_hash_ctx(&ctx,b);
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if (check_file)
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{
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char inhash[65],calcsum[65],filename[PATH_MAX];
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int failcount=0,count=0;;
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if (check_file==stdin && optind<argc)
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{
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check_file=fopen(argv[optind],"r");
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if (!check_file)
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{
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perror(argv[optind]);
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exit(2);
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}
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}
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while (get_line(check_file,inhash,filename))
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{
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if (!hash_file(&ctx,filename,calcsum,open_mode))
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{
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exit (2);
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}
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count++;
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if (!strncmp(calcsum,inhash,65))
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{
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if (verbose)
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{
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fprintf(stderr,"%s\tOK\n",filename);
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}
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}
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else
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{
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if (verbose)
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{
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fprintf(stderr,"%s\tFAILED\n",filename);
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}
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else
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{
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fprintf(stderr,"%s: GOST hash sum check failed for '%s'\n",
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argv[0],filename);
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}
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failcount++;
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}
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}
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if (verbose && failcount)
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{
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fprintf(stderr,"%s: %d of %d file(f) failed GOST hash sum check\n",
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argv[0],failcount,count);
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}
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exit (failcount?1:0);
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}
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if (optind==argc)
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{
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char sum[65];
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if (!hash_stream(&ctx,fileno(stdin),sum))
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{
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perror("stdin");
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exit(1);
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}
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printf("%s -\n",sum);
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exit(0);
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}
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for (i=optind;i<argc;i++)
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{
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char sum[65];
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if (!hash_file(&ctx,argv[i],sum,open_mode))
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{
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errors++;
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}
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else
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{
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printf("%s %s\n",sum,argv[i]);
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}
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}
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exit(errors?1:0);
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}
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int hash_file(gost_hash_ctx *ctx,char *filename,char *sum,int mode)
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{
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int fd;
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if ((fd=open(filename,mode))<0)
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{
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perror(filename);
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return 0;
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}
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if (!hash_stream(ctx,fd,sum))
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{
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perror(filename);
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return 0;
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}
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close(fd);
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return 1;
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}
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int hash_stream(gost_hash_ctx *ctx,int fd, char *sum)
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{
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unsigned char buffer[BUF_SIZE];
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ssize_t bytes;
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int i;
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start_hash(ctx);
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while ((bytes=read(fd,buffer,BUF_SIZE))>0)
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{
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hash_block(ctx,buffer,bytes);
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}
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if (bytes<0)
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{
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return 0;
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}
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finish_hash(ctx,buffer);
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for (i=0;i<32;i++)
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{
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sprintf(sum+2*i,"%02x",buffer[31-i]);
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}
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return 1;
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}
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int get_line(FILE *f,char *hash,char *filename)
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{
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int i;
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if (fread(hash,1,64,f)<64) return 0;
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hash[64]=0;
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for (i=0;i<64;i++)
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{
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if (hash[i]<'0' || (hash[i]>'9' && hash[i]<'A') || (hash[i]>'F'
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&& hash[i]<'a')||hash[i]>'f')
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{
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fprintf(stderr,"Not a hash value '%s'\n",hash);
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return 0;
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}
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}
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if (fgetc(f)!=' ')
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{
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fprintf(stderr,"Malformed input line\n");
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return 0;
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}
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i=strlen(fgets(filename,PATH_MAX,f));
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while (filename[--i]=='\n'||filename[i]=='\r') filename[i]=0;
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return 1;
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}
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