From: Vsevolod Stakhov <vsevolod@highsecure.ru>
Date: Tue, 3 May 2016 09:51:36 +0000 (+0100)
Subject: [Feature] Allow partial hash updates
X-Git-Tag: 1.3.0~573
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=773ef1f7414e60dfdd3a3ea73b89d9deda5e74d4;p=thirdparty%2Frspamd.git

[Feature] Allow partial hash updates
---

diff --git a/src/lua/lua_cryptobox.c b/src/lua/lua_cryptobox.c
index b95b1f2f62..7f267fe71d 100644
--- a/src/lua/lua_cryptobox.c
+++ b/src/lua/lua_cryptobox.c
@@ -662,6 +662,17 @@ lua_cryptobox_hash_update (lua_State *L)
 		data = luaL_checklstring (L, 2, &len);
 	}
 
+	if (lua_isnumber (L, 3)) {
+		gsize nlen = lua_tonumber (L, 3);
+
+		if (nlen > len) {
+			return luaL_error (L, "invalid length: %d while %d is available",
+					(int)nlen, (int)len);
+		}
+
+		len = nlen;
+	}
+
 	if (h && data) {
 		rspamd_cryptobox_hash_update (h, data, len);
 	}