Example usage for org.bouncycastle.crypto.digests GeneralDigest getByteLength

Introduction

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

Prototype

public int getByteLength() 

Source Link

Usage

From source file:it.yup.util.Utils.java

/**
 * // ww  w . j  a  va 2 s  .  c o  m
 * @param data
 * @param digestType
 * @return the digest or null if the requested digest is not supported
 */
static public byte[] digest(byte data[], String digestType) {
    GeneralDigest digest = null;
    if (digestType.equals("sha1")) {
        digest = new SHA1Digest();
    } else if (digestType.equals("md5")) {
        digest = new MD5Digest();
    } else {
        return null;
    }

    // XXX too many copies of data, modify the hash functions so that they write
    // the result to a byte array
    digest.update(data, 0, data.length);
    // some emulators fail on calling getByteLength  
    byte out[] = null;
    try {
        out = new byte[digest.getByteLength()];
    } catch (Error e) {
        out = new byte[64];
    }

    int len = digest.doFinal(out, 0);
    byte result[] = new byte[len];
    System.arraycopy(out, 0, result, 0, len);
    return result;
}

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