From c69f10c2ab21c93f1bae5b4bddbba4d35cba5cab Mon Sep 17 00:00:00 2001
From: Peter Marschall <peter@adpm.de>
Date: Sun, 17 Jun 2018 12:52:19 +0200
Subject: [PATCH] opensc-explorer: add command 'pin_info'

Get information on a PIN or key from the card via sc_pin_cmd()'s
SC_PIN_CMD_GET_INFO functionality.
---
 doc/tools/opensc-explorer.1.xml | 12 +++++++
 src/tools/opensc-explorer.c     | 58 +++++++++++++++++++++++++++++++++
 2 files changed, 70 insertions(+)

diff --git a/doc/tools/opensc-explorer.1.xml b/doc/tools/opensc-explorer.1.xml
index 23b90966..30312aa7 100644
--- a/doc/tools/opensc-explorer.1.xml
+++ b/doc/tools/opensc-explorer.1.xml
@@ -352,6 +352,18 @@
 							and <replaceable>size</replaceable> is the size of the new file.</para></listitem>
 				</varlistentry>
 
+				<varlistentry>
+					<term>
+						<command>pin_info</command>
+						<replaceable>key-type</replaceable><replaceable>key-id</replaceable>
+					</term>
+					<listitem><para>Get information on a PIN or key from the card, where
+							<replaceable>key-type</replaceable> can be one of <literal>CHV</literal>,
+							<literal>KEY</literal>, <literal>AUT</literal> or <literal>PRO</literal>.
+							<replaceable>key-id</replaceable> is a number representing the key or PIN reference.
+					</para></listitem>
+				</varlistentry>
+
 				<varlistentry>
 					<term>
 						<command>put</command>
diff --git a/src/tools/opensc-explorer.c b/src/tools/opensc-explorer.c
index 8dc02bc5..d45c597e 100644
--- a/src/tools/opensc-explorer.c
+++ b/src/tools/opensc-explorer.c
@@ -92,6 +92,7 @@ static int do_info(int argc, char **argv);
 static int do_create(int argc, char **argv);
 static int do_mkdir(int argc, char **argv);
 static int do_delete(int argc, char **argv);
+static int do_pininfo(int argc, char **argv);
 static int do_verify(int argc, char **argv);
 static int do_change(int argc, char **argv);
 static int do_unblock(int argc, char **argv);
@@ -152,6 +153,9 @@ static struct command	cmds[] = {
 	{ do_delete,
 		"rm",	"<file id>",
 		"remove an EF/DF"			},
+	{ do_pininfo,
+		"pin_info",	"{CHV|KEY|AUT|PRO}<key ref>",
+		"get information on PIN or key from the card"	},
 	{ do_verify,
 		"verify",	"{CHV|KEY|AUT|PRO}<key ref> [<pin>]",
 		"present a PIN or key to the card"	},
@@ -1083,6 +1087,60 @@ static int do_delete(int argc, char **argv)
 	return 0;
 }
 
+static int do_pininfo(int argc, char **argv)
+{
+	const id2str_t typeNames[] = {
+		{ SC_AC_CHV,	"CHV"	},
+		{ SC_AC_AUT,	"KEY"	},
+		{ SC_AC_AUT,	"AUT"	},
+		{ SC_AC_PRO,	"PRO"	},
+		{ SC_AC_NONE,	NULL, 	}
+	};
+	int r, tries_left = -1;
+	size_t i;
+	struct sc_pin_cmd_data data;
+	int prefix_len = 0;
+
+	if (argc != 1)
+		return usage(do_pininfo);
+
+	memset(&data, 0, sizeof(data));
+	data.cmd = SC_PIN_CMD_GET_INFO;
+
+	data.pin_type = SC_AC_NONE;
+	for (i = 0; typeNames[i].str; i++) {
+		prefix_len = strlen(typeNames[i].str);
+		if (strncasecmp(argv[0], typeNames[i].str, prefix_len) == 0) {
+			data.pin_type = typeNames[i].id;
+			break;
+		}
+	}
+	if (data.pin_type == SC_AC_NONE) {
+		printf("Invalid type.\n");
+		return usage(do_pininfo);
+	}
+	if (sscanf(argv[0] + prefix_len, "%d", &data.pin_reference) != 1) {
+		printf("Invalid key reference.\n");
+		return usage(do_pininfo);
+	}
+
+	r = sc_lock(card);
+	if (r == SC_SUCCESS)
+		r = sc_pin_cmd(card, &data, &tries_left);
+	sc_unlock(card);
+
+	if (r) {
+		printf("Unable to get PIN info: %s\n", sc_strerror(r));
+		return -1;
+	}
+	if (tries_left > 0)
+		printf("Logged %s, %d tries left.\n",
+			(data.pin1.logged_in) ? "in" : "out", tries_left);
+	else
+		printf("Logged %s\n.", (data.pin1.logged_in) ? "in" : "out");
+	return 0;
+}
+
 static int do_verify(int argc, char **argv)
 {
 	const id2str_t typeNames[] = {