Hans Leidekker : bcrypt: Reject DH keys smaller than 512 bits.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 0d95ae4252681d1380a8be96a3d26e32de7acabb
URL:    https://gitlab.winehq.org/wine/wine/-/commit/0d95ae4252681d1380a8be96a3d26e3...

Author: Hans Leidekker <hans(a)codeweavers.com>
Date:   Thu Dec  7 12:33:28 2023 +0100

bcrypt: Reject DH keys smaller than 512 bits.

---

 dlls/bcrypt/bcrypt_main.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/dlls/bcrypt/bcrypt_main.c b/dlls/bcrypt/bcrypt_main.c
index 0f2d94a418f..3f47b36d178 100644
--- a/dlls/bcrypt/bcrypt_main.c
+++ b/dlls/bcrypt/bcrypt_main.c
@@ -1210,6 +1210,8 @@ static NTSTATUS key_asymmetric_create( enum alg_id alg_id, ULONG bitlen, struct
         return STATUS_NOT_IMPLEMENTED;
     }
 
+    if (alg_id == ALG_ID_DH && bitlen < 512) return STATUS_INVALID_PARAMETER;
+
     if (!(key = calloc( 1, sizeof(*key) ))) return STATUS_NO_MEMORY;
     key->hdr.magic  = MAGIC_KEY;
     key->alg_id     = alg_id;