title: Pin verify command returns 90 00
body: <p>I want to verify PIN1 on smart card and read retry counter. According to ISO 7816-4 page 54 (1), retry counter is stored in 2 LSB of SW2(SW1 should be 63) after verify command, but I have SW1 SW2 = 90 00 in case of correct password:</p>
  
  <pre><code>&gt;&gt; Reset
  &lt;&lt;  3b 19 94 80 67 94 08 01 03 02 01 03
  &gt;&gt;  ff 00 ff
  &lt;&lt;  ff 00 ff
  &gt;&gt;  a0 a4 00 00 02
  &lt;&lt;  a4
  &gt;&gt;  3f 00
  &lt;&lt;  9f 16
  &gt;&gt;  a0 f2 00 00 16
  &lt;&lt;  f2 00 00 63 f4 3f 00 01 00 00 00 00 00 09 33 03 0a 08 00 83 8a 83 8a 90 00
  0: pin enabled...
  &gt;&gt;  a0 20 00 01 08
  &lt;&lt;  20
  &gt;&gt;  31 31 31 31 ff ff ff ff
  &lt;&lt;  90 00
  </code></pre>
  
  <p>And 98 04 in case of incorrect PIN1:</p>
  
  <pre><code>&gt;&gt;  a0 20 00 01 08
  &lt;&lt;  20
  &gt;&gt;  31 31 31 32 ff ff ff ff
  &lt;&lt;  98 04
  </code></pre>
  
  <p>What I missed?</p>
  
  <p>(1) <a href="http://www.embedx.com/pdfs/ISO_STD_7816/info_isoiec7816-4%7Bed2.0%7Den.pdf" rel="nofollow">http://www.embedx.com/pdfs/ISO_STD_7816/info_isoiec7816-4%7Bed2.0%7Den.pdf</a></p>