saife-endpoint-entropy.java

// Add the required amount of entropy
boolean entropic = false;

CertificationSigningRequest csr = null;

final FileInputStream fin = new FileInputStream("/dev/urandom");

byte[] b;

while (!entropic) {
    try {
        // read in 32 bits of data from /dev/urandom
        b = new byte[32];
        fin.read(b);

        System.out.println("adding entropy to SAIFE library");
        // add entropy to the SAIFE library, telling it 4 out of every 8 bits
        // are entropic enough
        saife.AddEntropy(b, 4);

        // attempt to generate a CSR
        csr = saife.generateSmCsr(dn, defaultPassword);

        entropic = true;

    } catch (final InsufficientEntropyException e) {
        System.out.println(e.getMessage());
        entropic = false;
    } catch (final IOException e) {
        System.out.println("Error reading in from /dev/urandom");
    }

}

try {
    fin.close();
} catch (final IOException e) {}