(Java) Compute Glacier SHA256 Tree Hash of a File
Computes the Amazon Glacier SHA256 tree hash for a file.
Note: This example requires Chilkat v9.5.0.78 or greater.
import com.chilkatsoft.*;
public class ChilkatExample {
static {
try {
System.loadLibrary("chilkat");
} catch (UnsatisfiedLinkError e) {
System.err.println("Native code library failed to load.\n" + e);
System.exit(1);
}
}
public static void main(String argv[])
{
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
CkCrypt2 crypt = new CkCrypt2();
// For more information about Amazon Glacier tree hashes, see Computing Glacier Checksums
// Chilkat added the "sha256-tree-hash" algorithm in v9.5.0.78 to make it easy to compute the Glacier tree hash checksum
// of a file or from bytes in memory.
crypt.put_HashAlgorithm("sha256-tree-hash");
// Return the hash in lowercase hexidecimal format.
crypt.put_EncodingMode("hexlower");
String treeHashHex = crypt.hashFileENC("qa_data/jpg/penguins.jpg");
System.out.println("SHA256 tree hash = " + treeHashHex);
}
}
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