1 /*
2 * Copyright 2014-2022 The GmSSL Project. All Rights Reserved.
3 *
4 * Licensed under the Apache License, Version 2.0 (the License); you may
5 * not use this file except in compliance with the License.
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 */
9
10
11 #include <stdio.h>
12 #include <errno.h>
13 #include <string.h>
14 #include <stdlib.h>
15 #include <gmssl/pem.h>
16 #include <gmssl/x509.h>
17
18
19 static const char *options = "[-in file] [-out file]";
20
certparse_main(int argc,char ** argv)21 int certparse_main(int argc, char **argv)
22 {
23 int ret = 1;
24 char *prog = argv[0];
25 char *infile = NULL;
26 char *outfile = NULL;
27 FILE *infp = stdin;
28 FILE *outfp = stdout;
29 uint8_t cert[18192];
30 size_t certlen;
31
32 argc--;
33 argv++;
34
35 while (argc > 0) {
36 if (!strcmp(*argv, "-help")) {
37 printf("usage: %s %s\n", prog, options);
38 goto end;
39 } else if (!strcmp(*argv, "-in")) {
40 if (--argc < 1) goto bad;
41 infile = *(++argv);
42 if (!(infp = fopen(infile, "r"))) {
43 fprintf(stderr, "%s: open '%s' failure : %s\n", prog, infile, strerror(errno));
44 goto end;
45 }
46 } else if (!strcmp(*argv, "-out")) {
47 if (--argc < 1) goto bad;
48 outfile = *(++argv);
49 if (!(outfp = fopen(outfile, "w"))) {
50 fprintf(stderr, "%s: open '%s' failure : %s\n", prog, outfile, strerror(errno));
51 goto end;
52 }
53 } else {
54 fprintf(stderr, "%s: illegal option '%s'\n", prog, *argv);
55 goto end;
56 bad:
57 fprintf(stderr, "%s: '%s' option value missing\n", prog, *argv);
58 goto end;
59 }
60
61 argc--;
62 argv++;
63 }
64
65 for (;;) {
66 int rv;
67 if ((rv = x509_cert_from_pem(cert, &certlen, sizeof(cert), infp)) != 1) {
68 if (rv < 0) fprintf(stderr, "%s: read certificate failure\n", prog);
69 else ret = 0;
70 goto end;
71 }
72 x509_cert_print(outfp, 0, 0, "Certificate", cert, certlen);
73 if (x509_cert_to_pem(cert, certlen, outfp) != 1) {
74 fprintf(stderr, "%s: output certficate failure\n", prog);
75 goto end;
76 }
77 }
78
79 end:
80 if (infile && infp) fclose(infp);
81 if (outfile && outfp) fclose(outfp);
82 return ret;
83 }
84