RFR 8157404: Unable to read certain PKCS12 keystores from SequenceInputStream

[Svetlana Nikandrova]

Hello,

please review this fix. It's not possible to read PKCS12 keystore with 
big undefined length DER value in it from SequenceInputStream. Root 
cause of the problem is that sun.security.util.DerValue relays on 
InputStream.available() to get a complete 'indefinite.length' section 
length and then read it, but for SequenceInputStream this method returns 
number of available bytes only for current input stream, not the whole 
sequence. Fixed to read all available data.

JBS:
https://bugs.openjdk.java.net/browse/JDK-8157404
Webrev:
http://cr.openjdk.java.net/~snikandrova/8157404/webrev.00/ 
<http://cr.openjdk.java.net/%7Esnikandrova/8157404/webrev.00/>

Thanks,
Svetlana
<http://cr.openjdk.java.net/%7Esnikandrova/8157404/webrev.00/>
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