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Sanitise freeing of DSA keys.

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[originally from svn r9984]
This commit is contained in:
Simon Tatham 2013-08-04 19:33:43 +00:00
parent ba49faec3d
commit 8041377799
1 changed files with 11 additions and 4 deletions
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15
sshdss.c
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@ -111,6 +111,7 @@ static void *dss_newkey(char *data, int len)
dss->q = getmp(&data, &len); dss->q = getmp(&data, &len);
dss->g = getmp(&data, &len); dss->g = getmp(&data, &len);
dss->y = getmp(&data, &len); dss->y = getmp(&data, &len);
dss->x = NULL;
return dss; return dss;
} }
@ -118,10 +119,16 @@ static void *dss_newkey(char *data, int len)
static void dss_freekey(void *key) static void dss_freekey(void *key)
{ {
struct dss_key *dss = (struct dss_key *) key; struct dss_key *dss = (struct dss_key *) key;
freebn(dss->p); if (dss->p)
freebn(dss->q); freebn(dss->p);
freebn(dss->g); if (dss->q)
freebn(dss->y); freebn(dss->q);
if (dss->g)
freebn(dss->g);
if (dss->y)
freebn(dss->y);
if (dss->x)
freebn(dss->x);
sfree(dss); sfree(dss);
} }