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Date: Fri, 17 Aug 2012 15:59:26 +0200
From: magnum <john.magnum@...hmail.com>
To: john-dev@...ts.openwall.com
Subject: pixMD5 promiscuous valid()
Jim,
When loading RAR hashes (format $RAR3$*1*f26be7b74ce9860e*c3...), I get
this:
Warning: only loading hashes of type "rar", but also saw type "pix-md5"
Use the "--format=pix-md5" option to force loading hashes of that type
instead
When looking into it, it seems pixMD5's valid() is too promiscuous. I
suppose I could do this for now:
diff --git a/src/pixMD5_fmt_plug.c b/src/pixMD5_fmt_plug.c
index 9223c4b..64537b8 100644
--- a/src/pixMD5_fmt_plug.c
+++ b/src/pixMD5_fmt_plug.c
@@ -69,7 +69,7 @@ static int valid(char *ciphertext, struct fmt_main
*self) {
return 0;
get_ptr();
i = strlen(ciphertext);
- if (i > CIPHERTEXT_LENGTH)
+ if (i == CIPHERTEXT_LENGTH + 12) // "$dynamic_19$" is 12 characters
return pDynamic_19->methods.valid(ciphertext, pDynamic_19);
if (i == CIPHERTEXT_LENGTH)
return pDynamic_19->methods.valid(Convert(Conv_Buf,
ciphertext), pDynamic_19);
Is this correct? I suppose it is. Anyway, it would be better to actually
check for the base64 alphabet (after checking for the $dynamic_19$ tag).
I'll wait with comitting anything in case you want to do something
better than the above.
magnum
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