From 7d4024a2cb4f38c3c2185dc6ebaf485d7eef05a6 Mon Sep 17 00:00:00 2001
From: Pol Henarejos <pol.henarejos@cttc.es>
Date: Sat, 23 Apr 2022 20:46:10 +0200
Subject: [PATCH] Added INS GET CHALLENGE.

Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>
---
 src/openpgp/openpgp.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/openpgp/openpgp.c b/src/openpgp/openpgp.c
index 16f9ff5..bdcd9da 100644
--- a/src/openpgp/openpgp.c
+++ b/src/openpgp/openpgp.c
@@ -1091,6 +1091,15 @@ static int cmd_activate_file() {
     return SW_OK();
 }
 
+static int cmd_challenge() {
+    uint8_t *rb = (uint8_t *)random_bytes_get(apdu.expected_res_size);
+    if (!rb)
+        return SW_WRONG_LENGTH();
+    memcpy(res_APDU, rb, apdu.expected_res_size);
+    res_APDU_size = apdu.expected_res_size;
+    return SW_OK();
+}
+
 typedef struct cmd
 {
   uint8_t ins;
@@ -1102,6 +1111,7 @@ typedef struct cmd
 #define INS_PSO_SIG         0x2A
 #define INS_RESET_RETRY     0x2C
 #define INS_ACTIVATE_FILE   0x44
+#define INS_CHALLENGE       0x84
 #define INS_KEYPAIR_GEN     0x47
 #define INS_SELECT          0xA4
 #define INS_GET_DATA        0xCA
@@ -1119,6 +1129,7 @@ static const cmd_t cmds[] = {
     { INS_PSO_SIG, cmd_pso_sig },
     { INS_TERMINATE_DF, cmd_terminate_df },
     { INS_ACTIVATE_FILE, cmd_activate_file },
+    { INS_CHALLENGE, cmd_challenge },
     { 0x00, 0x0}
 };