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