Example usage for org.bouncycastle.crypto.digests SHA1Digest SHA1Digest

Introduction

In this page you can find the example usage for org.bouncycastle.crypto.digests SHA1Digest SHA1Digest.

Prototype

public SHA1Digest(byte[] encodedState) 

Source Link

Document

State constructor - create a digest initialised with the state of a previous one.

Usage

From source file:com.sun.midp.crypto.SHA.java

License:Open Source License

/** 
 * Clones the MessageDigest object./*w  w  w.jav a2 s .c o  m*/
 * @return a clone of this object
 */
public Object clone() {
    return new SHA(new SHA1Digest(impl));
}

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From source file:TorJava.Node.java

License:Open Source License

/**
 * calculate the forward digest/*  www  .j a v  a 2s  . c o m*/
 * 
 * @param data
 * @return a four-byte array containing the digest
 */
byte[] calc_forward_digest(byte[] data) {
    Logger.logCrypto(Logger.RAW_DATA, "Node.calc_forward_digest() on:\n" + Encoding.toHexString(data, 100));
    sha1_forward.update(data, 0, data.length);
    byte[] digest = new byte[20];
    SHA1Digest copyOldState = new SHA1Digest(sha1_forward); // ugly fix
                                                            // around
                                                            // bouncy-castle's
                                                            // behaviour on
                                                            // hashes
    sha1_forward.doFinal(digest, 0);
    sha1_forward = copyOldState;
    Logger.logCrypto(Logger.VERBOSE, " result:\n" + Encoding.toHexString(digest, 100));
    byte[] four_bytes = new byte[4];
    System.arraycopy(digest, 0, four_bytes, 0, 4);
    return four_bytes;
}

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From source file:TorJava.Node.java

License:Open Source License

/**
 * calculate the backward digest/*from  w ww.  ja  va2  s.  c  o m*/
 * 
 * @param data
 * @return a four-byte array containing the digest
 */
byte[] calc_backward_digest(byte[] data) {
    Logger.logCrypto(Logger.RAW_DATA, "Node.calc_backward_digest() on:\n" + Encoding.toHexString(data, 100));
    sha1_backward.update(data, 0, data.length);
    byte[] digest = new byte[20];
    SHA1Digest copyOldState = new SHA1Digest(sha1_backward); // ugly fix
                                                             // around
                                                             // bouncy-castle's
                                                             // behaviour
                                                             // on hashes
    sha1_backward.doFinal(digest, 0);
    sha1_backward = copyOldState;
    Logger.logCrypto(Logger.RAW_DATA, " result:\n" + Encoding.toHexString(digest, 100));
    byte[] four_bytes = new byte[4];
    System.arraycopy(digest, 0, four_bytes, 0, 4);
    return four_bytes;
}

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