34 lines
832 B
Java
34 lines
832 B
Java
package org.thoughtcrime.securesms.util;
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import java.io.FileDescriptor;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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public class FileUtils {
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static {
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System.loadLibrary("native-utils");
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}
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public static native int getFileDescriptorOwner(FileDescriptor fileDescriptor);
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public static byte[] getFileDigest(FileInputStream fin) throws IOException {
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try {
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MessageDigest digest = MessageDigest.getInstance("SHA256");
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byte[] buffer = new byte[4096];
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int read = 0;
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while ((read = fin.read(buffer, 0, buffer.length)) != -1) {
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digest.update(buffer, 0, read);
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}
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return digest.digest();
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} catch (NoSuchAlgorithmException e) {
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throw new AssertionError(e);
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}
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}
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}
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