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more for the previous: make sure [i - 1] can never go negative.

This commit is contained in:
mrg 2014-12-26 19:52:00 +00:00
parent 7ce92dc944
commit 9e53ba939e
1 changed files with 2 additions and 2 deletions
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4
libexec/httpd/auth-bozo.c
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@ -1,4 +1,4 @@
/* $NetBSD: auth-bozo.c,v 1.15 2014/12/26 19:48:52 mrg Exp $ */
/* $NetBSD: auth-bozo.c,v 1.16 2014/12/26 19:52:00 mrg Exp $ */
/* $eterna: auth-bozo.c,v 1.17 2011/11/18 09:21:15 mrg Exp $ */
@ -265,7 +265,7 @@ base64_decode(const unsigned char *in, size_t ilen, unsigned char *out,
| decodetable[in[i + 3]];
#undef IN_CHECK
}
while (in[i - 1] == '=')
while (i > 0 && in[i - 1] == '=')
cp--,i--;
return (cp - out);
}