Hi everyone.

I'm working a java code to upload files to a server. Before trying to open
an SSL connection to the destination host, I want to add his certificate
to the KeyStore with my trusted certificates. I found an usefull example
here http://blogs.sun.com/andreas/entry/no_more_unable_to_find
so I adapted a little the code  

KeyStore ks = KeyStore.getInstance("JKS");
File file = new File("jssecacerts");
InputStream in = new FileInputStream(file);
  if (in.read()!=-1) 
      ks.load(in, "changeit".toCharArray()); [*]    <== exception
  else
      ks.load(null, "changeit".toCharArray());
in.close();

but when I'm executing my code once a first certificate has been added to
the KeyStore I go still this exception on the point [*]

java.io.IOException: Invalid keystore format
at sun.security.provider.JavaKeyStore.engineLoad(Unknown Source)
at sun.security.provider.JavaKeyStore$JKS.engineLoad(Unknown Source)
at java.security.KeyStore.load(Unknown Source)

What i'm doing wron?
TIA for your help. 


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> InputStream in = new FileInputStream(file);
>   if (in.read()!=-1) 
>       ks.load(in, "changeit".toCharArray()); [*]    <== exception
>   else
>       ks.load(null, "changeit".toCharArray());
> 
> What i'm doing wron?

Why do you read the first byte of the stream manually and expect
KeyStore to handle a now incomplete byte stream?

Ronny