Files
GmSSL/tools/cmsparse.c

89 lines
1.9 KiB
C

/*
* Copyright 2014-2022 The GmSSL Project. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the License); you may
* not use this file except in compliance with the License.
*
* http://www.apache.org/licenses/LICENSE-2.0
*/
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <gmssl/cms.h>
#include <gmssl/x509.h>
#include <gmssl/rand.h>
static const char *options = "-in file";
int cmsparse_main(int argc, char **argv)
{
int ret = 1;
char *prog = argv[0];
char *infile = NULL;
FILE *infp = stdin;
struct stat st;
uint8_t *cms = NULL;
size_t cms_maxlen, cmslen;
argc--;
argv++;
if (argc < 1) {
fprintf(stderr, "usage: %s %s\n", prog, options);
return 1;
}
while (argc > 1) {
if (!strcmp(*argv, "-help")) {
printf("usage: %s %s\n", prog, options);
ret = 0;
goto end;
} else if (!strcmp(*argv, "-in")) {
if (--argc < 1) goto bad;
infile = *(++argv);
if (!(infp = fopen(infile, "rb"))) {
fprintf(stderr, "%s: open '%s' failure : %s\n", prog, infile, strerror(errno));
goto end;
}
} else {
fprintf(stderr, "%s: illegal option '%s'\n", prog, *argv);
goto end;
bad:
fprintf(stderr, "%s: '%s' option value missing\n", prog, *argv);
goto end;
}
argc--;
argv++;
}
if (!infile) {
fprintf(stderr, "%s: option '-in' required'\n", prog);
goto end;
}
if (fstat(fileno(infp), &st) < 0) {
fprintf(stderr, "%s: access '%s' failed : %s\n", prog, infile, strerror(errno));
goto end;
}
cms_maxlen = (st.st_size * 3)/4 + 1;
if (!(cms = malloc(cms_maxlen))) {
fprintf(stderr, "%s: malloc failure\n", prog);
goto end;
}
if (cms_from_pem(cms, &cmslen, cms_maxlen, infp) != 1) {
fprintf(stderr, "%s: parse CMS error\n", prog);
goto end;
}
cms_print(stdout, 0, 0, "CMS", cms, cmslen);
ret = 0;
end:
if (infp) fclose(infp);
if (cms) free(cms);
return ret;
}