95 lines
2.3 KiB
Java
95 lines
2.3 KiB
Java
package eu.siacs.conversations.entities;
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import android.util.Log;
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import java.io.File;
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import eu.siacs.conversations.Config;
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import eu.siacs.conversations.utils.MimeUtils;
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public class DownloadableFile extends File {
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private static final long serialVersionUID = 2247012619505115863L;
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private long expectedSize = 0;
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private byte[] sha1sum;
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private byte[] aeskey;
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private byte[] iv;
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public DownloadableFile(final File parent, final String file) {
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super(parent, file);
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}
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public DownloadableFile(String path) {
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super(path);
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}
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public long getSize() {
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return super.length();
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}
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public long getExpectedSize() {
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return this.expectedSize;
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}
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public String getMimeType() {
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String path = this.getAbsolutePath();
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int start = path.lastIndexOf('.') + 1;
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if (start < path.length()) {
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String mime = MimeUtils.guessMimeTypeFromExtension(path.substring(start));
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return mime == null ? "" : mime;
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} else {
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return "";
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}
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}
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public void setExpectedSize(long size) {
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this.expectedSize = size;
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}
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public byte[] getSha1Sum() {
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return this.sha1sum;
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}
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public void setSha1Sum(byte[] sum) {
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this.sha1sum = sum;
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}
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public void setKeyAndIv(byte[] keyIvCombo) {
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// originally, we used a 16 byte IV, then found for aes-gcm a 12 byte IV is ideal
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// this code supports reading either length, with sending 12 byte IV to be done in future
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if (keyIvCombo.length == 48) {
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this.aeskey = new byte[32];
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this.iv = new byte[16];
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System.arraycopy(keyIvCombo, 0, this.iv, 0, 16);
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System.arraycopy(keyIvCombo, 16, this.aeskey, 0, 32);
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} else if (keyIvCombo.length == 44) {
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this.aeskey = new byte[32];
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this.iv = new byte[12];
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System.arraycopy(keyIvCombo, 0, this.iv, 0, 12);
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System.arraycopy(keyIvCombo, 12, this.aeskey, 0, 32);
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} else if (keyIvCombo.length >= 32) {
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this.aeskey = new byte[32];
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this.iv = new byte[]{ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0xf };
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System.arraycopy(keyIvCombo, 0, aeskey, 0, 32);
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}
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Log.d(Config.LOGTAG,"using "+this.iv.length+"-byte IV for file transmission");
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}
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public void setKey(byte[] key) {
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this.aeskey = key;
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}
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public void setIv(byte[] iv) {
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this.iv = iv;
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}
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public byte[] getKey() {
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return this.aeskey;
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}
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public byte[] getIv() {
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return this.iv;
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}
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}
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