Adapt storeutl to allow looking for a specific info type

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2688)

apps/storeutl.c

@@ -16,11 +16,13 @@
 #include <openssl/store.h>
 
 static int process(const char *uri, const UI_METHOD *uimeth, PW_CB_DATA *uidata,
+                   int expected,
                    int text, int noout, int recursive, int indent, BIO *out);
 
 typedef enum OPTION_choice {
     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP, OPT_ENGINE, OPT_OUT, OPT_PASSIN,
-    OPT_NOOUT, OPT_TEXT, OPT_RECURSIVE
+    OPT_NOOUT, OPT_TEXT, OPT_RECURSIVE,
+    OPT_SEARCHFOR_CERTS, OPT_SEARCHFOR_KEYS, OPT_SEARCHFOR_CRLS
 } OPTION_CHOICE;
 
 const OPTIONS storeutl_options[] = {
@@ -30,6 +32,9 @@ const OPTIONS storeutl_options[] = {
     {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
     {"text", OPT_TEXT, '-', "Print a text form of the objects"},
     {"noout", OPT_NOOUT, '-', "No PEM output, just status"},
+    {"certs", OPT_SEARCHFOR_CERTS, '-', "Search for certificates only"},
+    {"keys", OPT_SEARCHFOR_KEYS, '-', "Search for keys only"},
+    {"crls", OPT_SEARCHFOR_CRLS, '-', "Search for CRLs only"},
 #ifndef OPENSSL_NO_ENGINE
     {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
 #endif
@@ -46,6 +51,7 @@ int storeutl_main(int argc, char *argv[])
     OPTION_CHOICE o;
     char *prog = opt_init(argc, argv, storeutl_options);
     PW_CB_DATA pw_cb_data;
+    int expected = 0;
 
     while ((o = opt_next()) != OPT_EOF) {
         switch (o) {
@@ -73,6 +79,38 @@ int storeutl_main(int argc, char *argv[])
         case OPT_RECURSIVE:
             recursive = 1;
             break;
+        case OPT_SEARCHFOR_CERTS:
+        case OPT_SEARCHFOR_KEYS:
+        case OPT_SEARCHFOR_CRLS:
+            if (expected != 0) {
+                BIO_printf(bio_err, "%s: only one search type can be given.\n",
+                           prog);
+                goto end;
+            }
+            {
+                static const struct {
+                    enum OPTION_choice choice;
+                    int type;
+                } map[] = {
+                    {OPT_SEARCHFOR_CERTS, OSSL_STORE_INFO_CERT},
+                    {OPT_SEARCHFOR_KEYS, OSSL_STORE_INFO_PKEY},
+                    {OPT_SEARCHFOR_CRLS, OSSL_STORE_INFO_CRL},
+                };
+                size_t i;
+
+                for (i = 0; i < OSSL_NELEM(map); i++) {
+                    if (o == map[i].choice) {
+                        expected = map[i].type;
+                        break;
+                    }
+                }
+                /*
+                 * If expected wasn't set at this point, it means the map
+                 * isn't syncronised with the possible options leading here.
+                 */
+                OPENSSL_assert(expected != 0);
+            }
+            break;
         case OPT_ENGINE:
             e = setup_engine(opt_arg(), 0);
             break;
@@ -101,8 +139,9 @@ int storeutl_main(int argc, char *argv[])
     if (out == NULL)
         goto end;
 
-    ret = process(argv[0], get_ui_method(), &pw_cb_data, text, noout, recursive,
+    ret = process(argv[0], get_ui_method(), &pw_cb_data,
-                  0, out);
+                  expected,
+                  text, noout, recursive, 0, out);
 
  end:
     BIO_free_all(out);
@@ -125,6 +164,7 @@ static int indent_printf(int indent, BIO *bio, const char *format, ...)
 }
 
 static int process(const char *uri, const UI_METHOD *uimeth, PW_CB_DATA *uidata,
+                   int expected,
                    int text, int noout, int recursive, int indent, BIO *out)
 {
     OSSL_STORE_CTX *store_ctx = NULL;
@@ -137,6 +177,13 @@ static int process(const char *uri, const UI_METHOD *uimeth, PW_CB_DATA *uidata,
         return ret;
     }
 
+    if (expected != 0) {
+        if (!OSSL_STORE_expect(store_ctx, expected)) {
+            ERR_print_errors(bio_err);
+            goto end2;
+        }
+    }
+
     /* From here on, we count errors, and we'll return the count at the end */
     ret = 0;
 
@@ -188,8 +235,9 @@ static int process(const char *uri, const UI_METHOD *uimeth, PW_CB_DATA *uidata,
         case OSSL_STORE_INFO_NAME:
             if (recursive) {
                 const char *suburi = OSSL_STORE_INFO_get0_NAME(info);
-                ret += process(suburi, uimeth, uidata, text, noout, recursive,
+                ret += process(suburi, uimeth, uidata,
-                               indent + 2, out);
+                               expected,
+                               text, noout, recursive, indent + 2, out);
             }
             break;
         case OSSL_STORE_INFO_PARAMS:
@@ -230,6 +278,7 @@ static int process(const char *uri, const UI_METHOD *uimeth, PW_CB_DATA *uidata,
     }
     indent_printf(indent, out, "Total found: %d\n", items);
 
+ end2:
     if (!OSSL_STORE_close(store_ctx)) {
         ERR_print_errors(bio_err);
         ret++;