Examples with Digest org.bouncycastle.crypto.Digest used on opensource projects

Example 31 with Digest

use of org.bouncycastle.crypto.Digest in project nem2-sdk-java by nemtech.

the class Hashes method sha256ForSharedKey.

/**
 * Hasher used for shared keys
 *
 * @param sharedSecret the shared secret
 * @return the shared key hash.
 */
public static byte[] sha256ForSharedKey(byte[] sharedSecret) {
    Digest hash = new SHA256Digest();
    byte[] info = "catapult".getBytes();
    int length = 32;
    byte[] sharedKey = new byte[length];
    HKDFParameters params = new HKDFParameters(sharedSecret, null, info);
    HKDFBytesGenerator hkdf = new HKDFBytesGenerator(hash);
    hkdf.init(params);
    hkdf.generateBytes(sharedKey, 0, length);
    return sharedKey;
}