TCRYPT: add dump command

[platform/upstream/cryptsetup.git] / src / cryptsetup.c

diff --git a/src/cryptsetup.c b/src/cryptsetup.c
index 0cc7a49..7501fd6 100644 (file)
--- a/src/cryptsetup.c
+++ b/src/cryptsetup.c
@@ -82,6 +82,7 @@ static int action_luksRestore(int arg);
 static int action_loopaesOpen(int arg);
 static int action_luksRepair(int arg);
 static int action_tcryptOpen(int arg);
+static int action_tcryptDump(int arg);
 
 static struct action_type {
        const char *type;
@@ -115,6 +116,7 @@ static struct action_type {
        { "loopaesOpen",action_loopaesOpen,     0, 2, 1, N_("<device> <name> "), N_("open loop-AES device as mapping <name>") },
        { "loopaesClose",action_remove,         0, 1, 1, N_("<name>"), N_("remove loop-AES mapping") },
        { "tcryptOpen", action_tcryptOpen,      0, 2, 1, N_("<device> <name> "), N_("open TCRYPT device as mapping <name>") },
+       { "tcryptDump", action_tcryptDump,      0, 1, 1, N_("<device>"), N_("dump TCRYPT device information") },
        { NULL, NULL, 0, 0, 0, NULL, NULL }
 };
 
@@ -302,6 +304,41 @@ out:
        return r;
 }
 
+static int action_tcryptDump(int arg __attribute__((unused)))
+{
+       struct crypt_device *cd = NULL;
+       struct crypt_params_tcrypt params = {
+               .keyfiles = opt_keyfiles,
+               .keyfiles_count = opt_keyfiles_count,
+               .flags = CRYPT_TCRYPT_LEGACY_MODES,
+       };
+       int r;
+
+       if ((r = crypt_init(&cd, action_argv[0])))
+               goto out;
+
+       /* TCRYPT header is encrypted, get passphrase now */
+       r = crypt_get_key(_("Enter passphrase: "),
+                         CONST_CAST(char**)&params.passphrase,
+                         &params.passphrase_size, 0, 0, NULL, opt_timeout,
+                         _verify_passphrase(0), cd);
+       if (r < 0)
+               goto out;
+
+       if (opt_hidden)
+               params.flags |= CRYPT_TCRYPT_HIDDEN_HEADER;
+
+       r = crypt_load(cd, CRYPT_TCRYPT, &params);
+       if (r < 0)
+               goto out;
+
+       r = crypt_dump(cd);
+out:
+       crypt_free(cd);
+       crypt_safe_free(CONST_CAST(char*)params.passphrase);
+       return r;
+}
+
 static int action_remove(int arg __attribute__((unused)))
 {
        struct crypt_device *cd = NULL;
@@ -1425,9 +1462,9 @@ int main(int argc, const char **argv)
                _("Option --offset is supported only for create and loopaesOpen commands.\n"),
                poptGetInvocationName(popt_context));
 
-       if (opt_hidden && strcmp(aname, "tcryptOpen"))
+       if (opt_hidden && strcmp(aname, "tcryptOpen") && strcmp(aname, "tcryptDump"))
                usage(popt_context, EXIT_FAILURE,
-               _("Option --hidden is supported only for tcryptOpen command.\n"),
+               _("Option --hidden is supported only for TCRYPT commands.\n"),
                poptGetInvocationName(popt_context));
 
        if (opt_debug) {