From b39b6ac6b9913b37b4a9e068e1c096c2746bed04 Mon Sep 17 00:00:00 2001
From: Bernard Blundell <64490038+bern-spl@users.noreply.github.com>
Date: Thu, 5 Jun 2025 12:49:29 +0100
Subject: [PATCH] Added support for PIN retrieval from FIDO2_PIN environment
 variable

---
 tools/fido2-token.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tools/fido2-token.c b/tools/fido2-token.c
index d329b00..c811f8f 100644
--- a/tools/fido2-token.c
+++ b/tools/fido2-token.c
@@ -53,6 +53,7 @@ main(int argc, char **argv)
 	int ch;
 	int flags = 0;
 	char *device;
+	char *env_pin = 0;
 
 
 	// Parse command line arguments
@@ -64,6 +65,10 @@ main(int argc, char **argv)
 		}
 	}
 
+	// Support retrieving PIN from "FIDO2_PIN" environment variable
+	if (!global_pin && (env_pin = getenv("FIDO2_PIN"))) {
+		global_pin = strdup(env_pin);
+	}
 
 	while ((ch = getopt(argc, argv, TOKEN_OPT)) != -1) {
 		switch (ch) {