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Re: epan_base64_decode(): failure when string contains a NUL character
From: Uli Heilmeier <zeugs () heilmeier eu>
Date: Sun, 21 Apr 2013 22:22:47 +0200
Hi, Thanks for both replies! I did a complete clean-up of my code and now the decoded string is 14 bytes long. So the epan_base64_decode() function is working correct. Sorry for the work and the confusion. There is only one issue left: How can I split up this string. The g_strsplit() function seems to don't accept NULL as a delimiter. Thanks! Uli Am 20.04.13 11:55, schrieb Jakub Zawadzki:
Hi, On Wed, Apr 17, 2013 at 10:27:42PM +0200, Uli Heilmeier wrote:With the PLAIN mechanism the packet has a base64 encoded string containing: [authorization user](\x00)[authentication user](\x00)[password] For example: dGVzdAB0ZXN0ADEyMzQ= contains test(NUL)test(NUL)1234 I tried to decode the base64 string with the epan_base64_decode() function (from epan/base64.h). Unfortunately this fails. I only get a wrong three bytes long string. I guess the problem is the NUL character as a delimiter. Do you have an idea if this is bug in the epan_base64_decode() function or do I have to do the decoding another way?From C interactive shell (gdb): (gdb) call $x = (char *) strdup("dGVzdAB0ZXN0ADEyMzQ=") $1 = 0x65b0e0 "dGVzdAB0ZXN0ADEyMzQ=" (gdb) call epan_base64_decode($x) $2 = 14 (gdb) x/14c $x 0x65b0e0: 116 't' 101 'e' 115 's' 116 't' 0 '\000' 116 't' 101 'e' 115 's' 0x65b0e8: 116 't' 0 '\000' 49 '1' 50 '2' 51 '3' 52 '4' (gdb) call $x $3 = 0x65b0e0 "test" (gdb) call $x + 5 $4 = 0x65b0e5 "test" (gdb) call $x + 5 + 5 $5 = 0x65b0ea "1234" Seems to be working ok, can you attach your code? Regards, Jakub Zawadzki
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Current thread:
- epan_base64_decode(): failure when string contains a NUL character Uli Heilmeier (Apr 17)
- Re: epan_base64_decode(): failure when string contains a NUL character Evan Huus (Apr 17)
- Re: epan_base64_decode(): failure when string contains a NUL character Jakub Zawadzki (Apr 20)
- Re: epan_base64_decode(): failure when string contains a NUL character Uli Heilmeier (Apr 21)
- Re: epan_base64_decode(): failure when string contains a NUL character Evan Huus (Apr 21)
- Re: epan_base64_decode(): failure when string contains a NUL character Uli Heilmeier (Apr 24)
- Re: epan_base64_decode(): failure when string contains a NUL character Uli Heilmeier (Apr 21)