From: Andreas Steffen <andreas.steffen@strongswan.org>
Date: Mon, 10 Jan 2011 04:06:59 +0000 (+0100)
Subject: handle zero size Base64 conversions
X-Git-Tag: 4.5.1~119
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f33966fe8f3fba72b77ad8a3a162db4c6bf1ba97;p=thirdparty%2Fstrongswan.git

handle zero size Base64 conversions
---

diff --git a/src/libcharon/plugins/tnccs_11/messages/imc_imv_msg.c b/src/libcharon/plugins/tnccs_11/messages/imc_imv_msg.c
index c99cd2ef3c..eafb14e52b 100644
--- a/src/libcharon/plugins/tnccs_11/messages/imc_imv_msg.c
+++ b/src/libcharon/plugins/tnccs_11/messages/imc_imv_msg.c
@@ -64,6 +64,14 @@ static chunk_t encode_base64(chunk_t data)
 	u_char *pos;
 	size_t b64_chars, b64_lines;
 
+	/* handle empty message data object */
+	if (data.len == 0)
+	{
+		encoding = chunk_alloc(1);
+		*encoding.ptr = '\0';
+		return encoding;
+	}
+
 	/* compute and allocate maximum size of base64 object */
 	b64_chars = 4 * ((data.len + 2) / 3);
 	b64_lines = (data.len + BYTES_PER_LINE - 1) / BYTES_PER_LINE;