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winhttp: Fix the base64 decoder.

This commit is contained in:
Hans Leidekker 2013-09-04 15:00:35 +02:00 committed by Alexandre Julliard
parent 2d5ecbee43
commit 050a46f30f
1 changed files with 16 additions and 1 deletions
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17
dlls/winhttp/request.c
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@ -1384,7 +1384,7 @@ static unsigned int decode_base64( const WCHAR *base64, unsigned int len, char *
char c0, c1, c2, c3;
const WCHAR *p = base64;
while (len >= 4)
while (len > 4)
{
if ((c0 = decode_char( p[0] )) > 63) return 0;
if ((c1 = decode_char( p[1] )) > 63) return 0;
@ -1422,6 +1422,21 @@ static unsigned int decode_base64( const WCHAR *base64, unsigned int len, char *
}
i += 2;
}
else
{
if ((c0 = decode_char( p[0] )) > 63) return 0;
if ((c1 = decode_char( p[1] )) > 63) return 0;
if ((c2 = decode_char( p[2] )) > 63) return 0;
if ((c3 = decode_char( p[3] )) > 63) return 0;
if (buf)
{
buf[i + 0] = (c0 << 2) | (c1 >> 4);
buf[i + 1] = (c1 << 4) | (c2 >> 2);
buf[i + 2] = (c2 << 6) | c3;
}
i += 3;
}
return i;
}