MFBlock.write to sector trailer problem

[tfroidcoeur]

hi,

I use MFBlock.write(key, src,dstoffset) to write to a sector trailer. I write 16 bytes and they contain a valid sector trailer (0xd3 0xf7 0xd3 0xf7 0xd3 0xf7 0x7f 0x07 0x88 0x40 0xff 0xff 0xff 0xff 0xff 0xff). I write at offset 0 of block 3.

I get an IllegalArgumentException back. The docs say

However if writing sector trailers and the amount of data isn't a multiple of the block size then an IllegalArgumentException will be thrown

So I would expect this to succeed.

I'm writing to the mifare emulation on the secure element.
The SE has been unlocked, I checked an all trailers are set to default.
The midlet is signed and can successfully talk to the secure element.

any ideas how I could write this sector trailer to the mifare emulation?

[tfroidcoeur]

ok sorry,
i was using MFBlock.write(key, data,0,0,16) and that gave an illegalargumentexception. If i use MFBlock.write(key, data, 0) it works. strange, but if it works...

thnx

Tim

[tsavinen]

Shouldn't it have been MFBlock.write(key, data,0,16,0), not MFBlock.write(key, data,0,0,16)?

[tfroidcoeur]

you're right. I should have read the docs

sorry