Blackberry and SSL

Discussion in 'Java' started by John Goche, Jan 19, 2006.

  1. John Goche

    John Goche Guest


    I am using the BlackBerry J2ME emulator to establish an
    SSL connection. While connected I accept the certificate,
    write some data, then read some data from the input stream
    as follows. However, after reading is.available() number of
    bytes (see code below), the input stream is starts returning
    garbage (not the bytes I see when I connect from my C++
    SSL library code).

    What am I supposed to do so that is.getBytes() does not
    return junk bytes after returning int is.available() number of
    bytes? Am I supposed to close() and then reopen() the input
    streams? Should I buffer them somehow using producer and
    consumer threads? I tried increasing the receive buffer size
    but it did not help. What should I do to fix this problem.
    Alternatively, anyone know of any good SSL libraries
    out there that work (given that I am not having much
    luck with the BlackBerry one?). What am I
    doing wrong?

    class Foo {

    private SecureConnection sc;
    private InputStream is;
    private OutputStream os;

    boolean open(String host, String port) {

    try {

    String str = "ssl://" + host + ":" + port;

    sc = (SecureConnection);

    //sc.setSocketOption(SocketConnection.LINGER, 5);
    //sc.setSocketOption(SocketConnection.KEEPALIVE, 1);
    sc.setSocketOption(SocketConnection.RCVBUF, 6000);

    is = sc.openInputStream();

    os = sc.openOutputStream();

    return true;

    } catch (IOException e) {

    Dialog.alert("Could not open secure connection.");


    return false;


    // ...

    private synchronized byte[] getBytes(int size) {

    if (size > 0) {

    byte[] bytes = new byte[size];

    int count = 0;

    int val;

    try {

    while (count < size) {

    if ((val =, count, size - count)) == -1) {



    count += val;


    } catch (IOException e) {



    return bytes;


    return null;


    John Goche, Jan 19, 2006
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  2. John Goche

    John Goche Guest


    I am have done some more testing on this
    BlackBerry SecureConnection code with the JDE...

    sc = (SecureConnection);

    is = sc.openInputStream();

    is.available() returns 0

    I call to read X bytes.

    I call is.available() returns 2^14 + 4 - x.

    I call to read is.available() bytes.

    is.available() returns 0.

    I call and I read some junk.

    After the junk, I see the original X bytes
    I had originally read.

    After that, I get network read errors when
    trying to read more bytes.

    It is as though the SSL library is not decoding
    my data properly. So now I am going to try the
    Nokia API, the J2SE API, and look for addon
    Java SSL libraries which I might be able to
    include as alternative source code as part
    of my project if they only work properly.

    Any feedback welcome,


    John Goche, Jan 19, 2006
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