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DigestRunnable.java
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41 lines (35 loc) · 1.1 KB
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import java.io.*;
import java.security.*;
import javax.xml.bind.*; // for DatatypeConverter; requires Java 6 or JAXB 1.0
public class DigestRunnable implements Runnable {
private String filename;
public DigestRunnable(String filename) {
this.filename = filename;
}
@Override
public void run() {
try {
FileInputStream in = new FileInputStream(filename);
MessageDigest sha = MessageDigest.getInstance("SHA-256");
DigestInputStream din = new DigestInputStream(in, sha);
while (din.read() != -1) ;
din.close();
byte[] digest = sha.digest();
StringBuilder result = new StringBuilder(filename);
result.append(": ");
result.append(DatatypeConverter.printHexBinary(digest));
System.out.println(result);
} catch (IOException ex) {
System.err.println(ex);
} catch (NoSuchAlgorithmException ex) {
System.err.println(ex);
}
}
public static void main(String[] args) {
for (String filename : args) {
DigestRunnable dr = new DigestRunnable(filename);
Thread t = new Thread(dr);
t.start();
}
}
}