From b45ac1c912bd1aef26e9825fdbd6b535defe1186 Mon Sep 17 00:00:00 2001
From: merlokk <olegmsn@gmail.com>
Date: Tue, 23 Jan 2018 12:48:46 +0200
Subject: [PATCH] add testing prng

---
 client/mifarehost.c | 5 +++++
 client/mifarehost.h | 1 +
 2 files changed, 6 insertions(+)

diff --git a/client/mifarehost.c b/client/mifarehost.c
index d204bf12..f917a2f2 100644
--- a/client/mifarehost.c
+++ b/client/mifarehost.c
@@ -842,6 +842,11 @@ int mfTraceDecode(uint8_t *data_src, int len, bool wantSaveToEmlFile) {
 				crypto1_get_lfsr(revstate, &lfsr);
 				printf("key> %x%x\n", (unsigned int)((lfsr & 0xFFFFFFFF00000000) >> 32), (unsigned int)(lfsr & 0xFFFFFFFF));
 				AddLogUint64(logHexFileName, "key> ", lfsr);
+				if (validate_prng_nonce(nt)) {
+					printf("key> Prng: WEAK\n");
+				} else {
+					printf("key> Prng: HARDEND\n");
+				}
 			} else {
 				printf("key> nested not implemented!\n");
 				at_enc = bytes_to_num(data, 4);
diff --git a/client/mifarehost.h b/client/mifarehost.h
index 031dac1b..8bae5cbc 100644
--- a/client/mifarehost.h
+++ b/client/mifarehost.h
@@ -61,5 +61,6 @@ extern int tryDecryptWord(uint32_t nt, uint32_t ar_enc, uint32_t at_enc, uint8_t
 
 extern int mfCIdentify();
 extern int DetectClassicPrng(void);
+extern bool validate_prng_nonce(uint32_t nonce);
 
 #endif