From 5c7e0e9fb147c68bde04efa4539bfdd299087edc Mon Sep 17 00:00:00 2001 From: Steffen Jaeckel Date: Mon, 20 Apr 2026 14:21:34 +0200 Subject: [PATCH] Allow `pt` as NULL if there's nothing to encrypt. Signed-off-by: Steffen Jaeckel --- src/encauth/siv/siv.c | 2 +- src/modes/ctr/ctr_encrypt.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/src/encauth/siv/siv.c b/src/encauth/siv/siv.c index c07a9eac..b8efb805 100644 --- a/src/encauth/siv/siv.c +++ b/src/encauth/siv/siv.c @@ -263,7 +263,7 @@ int siv_encrypt_memory( int cipher, LTC_ARGCHK(key != NULL); LTC_ARGCHK(ad != NULL); LTC_ARGCHK(adlen != NULL); - LTC_ARGCHK(pt != NULL); + LTC_ARGCHK(pt != NULL || ptlen == 0); LTC_ARGCHK(ct != NULL); LTC_ARGCHK(ctlen != NULL); diff --git a/src/modes/ctr/ctr_encrypt.c b/src/modes/ctr/ctr_encrypt.c index 2859574b..043b5ae4 100644 --- a/src/modes/ctr/ctr_encrypt.c +++ b/src/modes/ctr/ctr_encrypt.c @@ -81,7 +81,7 @@ int ctr_encrypt(const unsigned char *pt, unsigned char *ct, unsigned long len, s { int err, fr; - LTC_ARGCHK(pt != NULL); + LTC_ARGCHK(pt != NULL || len == 0); LTC_ARGCHK(ct != NULL); LTC_ARGCHK(ctr != NULL);