From bcf94337fb39fd4b9c42490392a795ac8c8886b2 Mon Sep 17 00:00:00 2001
From: Werner Koch <wk@gnupg.org>
Date: Thu, 24 Jul 2025 10:38:23 +0200
Subject: agent: Allow colon delimited fingerprints for ISTRUSTED.

* agent/command.c (cmd_istrusted): Improve arg parser.
---
 agent/command.c | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/agent/command.c b/agent/command.c
index a9eb0104e..dcb758e37 100644
--- a/agent/command.c
+++ b/agent/command.c
@@ -541,14 +541,26 @@ cmd_istrusted (assuan_context_t ctx, char *line)
 {
   ctrl_t ctrl = assuan_get_pointer (ctx);
   int rc, n, i;
-  char *p;
+  char *p, *pn;
   char fpr[41];
 
   /* Parse the fingerprint value. */
+  pn = NULL;  /* Indicates that we have not reparsed.  */
+ parseagain:
   for (p=line,n=0; hexdigitp (p); p++, n++)
     ;
   if (*p || !(n == 40 || n == 32))
-    return set_error (GPG_ERR_ASS_PARAMETER, "invalid fingerprint");
+    {
+      if (!pn && *p && strchr (p, ':'))
+        {
+          for (pn=p=line; *p ; p++)
+            if (*p != ':')
+              *pn++ = *p;
+          *pn = 0;
+          goto parseagain;
+        }
+      return set_error (GPG_ERR_ASS_PARAMETER, "invalid fingerprint");
+    }
   i = 0;
   if (n==32)
     {
-- 
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