- X509 *cert;
- FILE *inf;
- int i, count;
- X509_EXTENSION *ext;
- X509V3_add_standard_extensions();
- ERR_load_crypto_strings();
- if(!argv[1]) {
- fprintf(stderr, "Usage v3prin cert.pem\n");
- exit(1);
- }
- if(!(inf = fopen(argv[1], "r"))) {
- fprintf(stderr, "Can't open %s\n", argv[1]);
- exit(1);
- }
- if(!(cert = PEM_read_X509(inf, NULL, NULL))) {
- fprintf(stderr, "Can't read certificate %s\n", argv[1]);
- ERR_print_errors_fp(stderr);
- exit(1);
- }
- fclose(inf);
- count = X509_get_ext_count(cert);
- printf("%d extensions\n", count);
- for(i = 0; i < count; i++) {
- ext = X509_get_ext(cert, i);
- printf("%s\n", OBJ_nid2ln(OBJ_obj2nid(ext->object)));
- if(!X509V3_EXT_print_fp(stdout, ext, 0, 0)) ERR_print_errors_fp(stderr);
- printf("\n");
-
- }
- return 0;
+ X509 *cert;
+ FILE *inf;
+ int i, count;
+ X509_EXTENSION *ext;
+
+ X509V3_add_standard_extensions();
+ ERR_load_crypto_strings();
+ if (!argv[1]) {
+ fprintf(stderr, "Usage v3prin cert.pem\n");
+ exit(1);
+ }
+ if ((inf = fopen(argv[1], "r")) == NULL) {
+ fprintf(stderr, "Can't open %s\n", argv[1]);
+ exit(1);
+ }
+ if ((cert = PEM_read_X509(inf, NULL, NULL)) == NULL) {
+ fprintf(stderr, "Can't read certificate %s\n", argv[1]);
+ ERR_print_errors_fp(stderr);
+ exit(1);
+ }
+ fclose(inf);
+ count = X509_get_ext_count(cert);
+ printf("%d extensions\n", count);
+ for (i = 0; i < count; i++) {
+ ext = X509_get_ext(cert, i);
+ printf("%s\n", OBJ_nid2ln(OBJ_obj2nid(ext->object)));
+ if (!X509V3_EXT_print_fp(stdout, ext, 0, 0))
+ ERR_print_errors_fp(stderr);
+ printf("\n");
+
+ }
+ return 0;