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 c99cd2ef3cd47477d3ad4332b3e450b16be07d43..eafb14e52b25219526e231d506d46ed1fba5ca2f 100644 (file)
--- 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;