From 796246168a709ccf737e90d41ceadfda16002b00 Mon Sep 17 00:00:00 2001
From: Aleksander Alekseev <aleksander@tigerdata.com>
Date: Thu, 13 Aug 2026 12:38:02 +0300
Subject: [PATCH v1] pgcrypto: remove unused PGP_Context.mdc_checked field

mdc_finish() set this field once it had successfully verified the MDC
packet. Its only reader used to be in the same function. That branch was
removed by a59ee881978 when mdc_finish() stopped being called through
the pullf_read() API, and nothing has looked at the field since.

Note that MDC verification does not rely on it: process_data_packets()
tracks whether an MDC packet was seen in its local got_mdc variable and
rejects the message if a required MDC is missing, while the
use_mdcbuf_filter path checks the hash in mdcbuf_finish().

Oversight in a59ee881978.

Author: Aleksander Alekseev <aleksander@tigerdata.com>
Reviewed-by: TODO FIXME
Discussion: TODO FIXME
---
 contrib/pgcrypto/pgp-decrypt.c | 1 -
 contrib/pgcrypto/pgp.h         | 1 -
 2 files changed, 2 deletions(-)

diff --git a/contrib/pgcrypto/pgp-decrypt.c b/contrib/pgcrypto/pgp-decrypt.c
index 47ae83db789..5f4be35b25a 100644
--- a/contrib/pgcrypto/pgp-decrypt.c
+++ b/contrib/pgcrypto/pgp-decrypt.c
@@ -388,7 +388,6 @@ mdc_finish(PGP_Context *ctx, PullFilter *src, int len)
 		px_debug("mdc_finish: mdc failed");
 		return PXE_PGP_CORRUPT_DATA;
 	}
-	ctx->mdc_checked = 1;
 	return 0;
 }
 
diff --git a/contrib/pgcrypto/pgp.h b/contrib/pgcrypto/pgp.h
index 7b130388fcc..3c4610608d1 100644
--- a/contrib/pgcrypto/pgp.h
+++ b/contrib/pgcrypto/pgp.h
@@ -156,7 +156,6 @@ struct PGP_Context
 	/*
 	 * internal variables
 	 */
-	int			mdc_checked;
 	int			corrupt_prefix; /* prefix failed RFC 4880 "quick check" */
 	int			unsupported_compr;	/* has bzip2 compression */
 	int			unexpected_binary;	/* binary data seen in text_mode */
-- 
2.43.0

