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authorRainer Gerhards <rgerhards@adiscon.com>2013-09-26 14:55:47 +0200
committerRainer Gerhards <rgerhards@adiscon.com>2013-09-26 14:55:47 +0200
commitdfae5feb8c09c285a7af403f07a18254d0a86ad3 (patch)
treec9622a02caa86218c8b31ed1df261bbb88a7544f /runtime/msg.c
parentb810f0dd3ade85efeb7dc9b99fade798764d0ac2 (diff)
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mmrfc5424addhmac: correctly handle empty structured data
Diffstat (limited to 'runtime/msg.c')
-rw-r--r--runtime/msg.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/runtime/msg.c b/runtime/msg.c
index 18f72086..85f83502 100644
--- a/runtime/msg.c
+++ b/runtime/msg.c
@@ -4073,10 +4073,14 @@ MsgAddToStructuredData(msg_t *pMsg, uchar *toadd, rs_size_t len)
uchar *newptr;
rs_size_t newlen;
DEFiRet;
- newlen = pMsg->lenStrucData + len;
+ newlen = (pMsg->pszStrucData[0] == '-') ? len : pMsg->lenStrucData + len;
CHKmalloc(newptr = (uchar*) realloc(pMsg->pszStrucData, newlen+1));
pMsg->pszStrucData = newptr;
- memcpy(pMsg->pszStrucData+pMsg->lenStrucData, toadd, len);
+ if(pMsg->pszStrucData[0] == '-') { /* empty? */
+ memcpy(pMsg->pszStrucData, toadd, len);
+ } else {
+ memcpy(pMsg->pszStrucData+pMsg->lenStrucData, toadd, len);
+ }
pMsg->pszStrucData[newlen] = '\0';
pMsg->lenStrucData = newlen;
finalize_it: