41 lines
1.3 KiB
Java
41 lines
1.3 KiB
Java
package tsdemo;
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/*
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* amHashFile.java
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*
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* Created on 2007. March 22
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*
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*/
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import java.security.MessageDigest;
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import java.io.InputStream;
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import oracle.sql.BLOB;
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public class amHashFile
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{
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/** Creates a new instance of HashFile */
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public amHashFile() {
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}
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public static byte[] getHash(oracle.sql.BLOB blobFile, String Algorithm) {
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try {
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MessageDigest d = MessageDigest.getInstance(Algorithm); // Get a hash handler
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//FileInputStream f = new FileInputStream(Filename); // open file for hashing
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/* get the blob from the documents table as a binary input stream */
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//oracle.sql.BLOB blob = blobFile;
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InputStream f = blobFile.getBinaryStream ();
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//
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byte[] b = new byte[1];
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while ( -1 != f.read(b, 0, 1)) // feed the message digester
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d.update(b);
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f.close();
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return d.digest(); // get the final hash and return it
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} catch (Exception e) {
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System.out.println("Hashing Error " + e.getMessage());
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return null;
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}
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}
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}
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