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Further tightening up in PSCP. Fixed a couple more holes whereby a

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malicious SCP server could have written to areas other than the ones
the user requested; cleared up buffer overruns everywhere. Hopefully
we now do not use arbitrary buffer limits _anywhere_.

[originally from svn r1205]
This commit is contained in:
Simon Tatham
2001-08-26 15:31:29 +00:00
parent f7f96066f7
commit 306a13c025
4 changed files with 172 additions and 101 deletions
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46
psftp.c
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@ -24,52 +24,6 @@
* send buffer.
*/
/* ----------------------------------------------------------------------
* String handling routines.
*/
char *dupstr(char *s)
{
int len = strlen(s);
char *p = smalloc(len + 1);
strcpy(p, s);
return p;
}
/* Allocate the concatenation of N strings. Terminate arg list with NULL. */
char *dupcat(char *s1, ...)
{
int len;
char *p, *q, *sn;
va_list ap;
len = strlen(s1);
va_start(ap, s1);
while (1) {
sn = va_arg(ap, char *);
if (!sn)
break;
len += strlen(sn);
}
va_end(ap);
p = smalloc(len + 1);
strcpy(p, s1);
q = p + strlen(p);
va_start(ap, s1);
while (1) {
sn = va_arg(ap, char *);
if (!sn)
break;
strcpy(q, sn);
q += strlen(q);
}
va_end(ap);
return p;
}
/* ----------------------------------------------------------------------
* sftp client state.
*/