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Subject: Re: [Bitcoin-development] BIP 38 NFC normalisation issue
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Damn, I just realized that I implement only the decoding side of BIP38.
So I cannot propose a complete test vector. Here is what I have:
Passphrase: ϓ␀𐐀💩 (\u03D2\u0301\u0000\U00010400\U0001F4A9; GREEK
UPSILON WITH HOOK, COMBINING ACUTE ACCENT, NULL, DESERET CAPITAL LETTER
LONG I, PILE OF POO)
Passphrase bytes after removing ISO control characters and NFC
normalization: 0xcf933034303066346139
Bitcoin Address: 16ktGzmfrurhbhi6JGqsMWf7TyqK9HNAeF
Unencrypted private key (WIF):
5Jajm8eQ22H3pGWLEVCXyvND8dQZhiQhoLJNKjYXk9roUFTMSZ4
Can someone calculate the encrypted key from it (using whatever
implementation) and I will verify it decodes properly in bitcoinj?
On 07/16/2014 12:46 PM, Andreas Schildbach wrote:
> I will change the bitcoinj implementation and propose a new test vector.
>
>
>
> On 07/16/2014 11:29 AM, Mike Hearn wrote:
>> Yes sorry, you're right, the issue starts with the null code point.
>> Python seems to have problems starting there too. It might work if we
>> took that out.
>>
>>
>> On Wed, Jul 16, 2014 at 11:17 AM, Andreas Schildbach
>> <andreas@schildbach.de <mailto:andreas@schildbach.de>> wrote:
>>
>> Guys, you are always talking about the Unicode astral plane, but in fact
>> its a plain old (ASCII) control character where this problem starts and
>> likely ends: \u0000.
>>
>> Let's ban/filter ISO control characters and be done with it. Most
>> control characters will never be enterable by any keyboard into a
>> password field. Of course I assume that Character.isISOControl() works
>> consistently across platforms.
>>
>> http://docs.oracle.com/javase/7/docs/api/java/lang/Character.html#isISOControl%28char%29
>>
>>
>> On 07/16/2014 12:23 AM, Aaron Voisine wrote:
>> > If the user creates a password on an iOS device with an astral
>> > character and then can't enter that password on a JVM wallet, that
>> > sucks. If JVMs really can't support unicode NFC then that's a strong
>> > case to limit the spec to the subset of unicode that all popular
>> > platforms can support, but it sounds like it might just be a JVM
>> > string library bug that could hopefully be reported and fixed. I get
>> > the same result as in the test case using apple's
>> > CFStringNormalize(passphrase, kCFStringNormalizationFormC);
>> >
>> > Aaron Voisine
>> > breadwallet.com <http://breadwallet.com>
>> >
>> >
>> > On Tue, Jul 15, 2014 at 11:20 AM, Mike Hearn <mike@plan99.net
>> <mailto:mike@plan99.net>> wrote:
>> >> Yes, we know, Andreas' code is indeed doing normalisation.
>> >>
>> >> However it appears the output bytes end up being different. What
>> I get back
>> >> is:
>> >>
>> >> cf930001303430300166346139
>> >>
>> >> vs
>> >>
>> >> cf9300f0909080f09f92a9
>> >>
>> >> from the spec.
>> >>
>> >> I'm not sure why. It appears this is due to the character from
>> the astral
>> >> planes. Java is old and uses 16 bit characters internally - it
>> wouldn't
>> >> surprise me if there's some weirdness that means it doesn't/won't
>> support
>> >> this kind of thing.
>> >>
>> >> I recommend instead that any implementation that wishes to be
>> compatible
>> >> with JVM based wallets (I suspect Android is the same) just
>> refuse any
>> >> passphrase that includes characters outside the BMP. At least
>> unless someone
>> >> can find a fix. I somehow doubt this will really hurt anyone.
>> >>
>> >>
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>> > http://p.sf.net/sfu/bds
>> >
>>
>>
>>
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>> search on Ohloh, the Black Duck Open Hub! Try it now.
>> http://p.sf.net/sfu/bds
>> _______________________________________________
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>>
>>
>>
>>
>> ------------------------------------------------------------------------------
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>> search up to 200,000 lines of code with a free copy of Black Duck
>> Code Sight - the same software that powers the world's largest code
>> search on Ohloh, the Black Duck Open Hub! Try it now.
>> http://p.sf.net/sfu/bds
>>
>>
>>
>> _______________________________________________
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>> Bitcoin-development@lists.sourceforge.net
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>>
>
>
>
> ------------------------------------------------------------------------------
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> search up to 200,000 lines of code with a free copy of Black Duck
> Code Sight - the same software that powers the world's largest code
> search on Ohloh, the Black Duck Open Hub! Try it now.
> http://p.sf.net/sfu/bds
>
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