X-Git-Url: http://git.nikiroo.be/?p=fanfix.git;a=blobdiff_plain;f=src%2Fbe%2Fnikiroo%2Futils%2FHashUtils.java;fp=src%2Fbe%2Fnikiroo%2Futils%2FHashUtils.java;h=df8d7c62daee97649c3e7528a6b884b3e041fd6e;hp=0000000000000000000000000000000000000000;hb=f433d15308b70e23280a65cef8c54002a7a971ce;hpb=5ddc36eacad78641be59db473f9bae9bad47eb20

diff --git a/src/be/nikiroo/utils/HashUtils.java b/src/be/nikiroo/utils/HashUtils.java
new file mode 100644
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+++ b/src/be/nikiroo/utils/HashUtils.java
@@ -0,0 +1,89 @@
+package be.nikiroo.utils;
+
+import java.io.UnsupportedEncodingException;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+
+/**
+ * Small class to easily hash some values in a few different ways.
+ * <p>
+ * Does <b>not</b> handle the salt itself, you have to add it yourself.
+ * 
+ * @author niki
+ */
+public class HashUtils {
+	/**
+	 * Hash the given value.
+	 * 
+	 * @param value
+	 *            the value to hash
+	 * 
+	 * @return the hash that can be used to confirm a value
+	 * 
+	 * @throws RuntimeException
+	 *             if UTF-8 support is not available (!) or SHA-512 support is
+	 *             not available
+	 * @throws NullPointerException
+	 *             if email or pass is NULL
+	 */
+	static public String sha512(String value) {
+		return hash("SHA-512", value);
+	}
+
+	/**
+	 * Hash the given value.
+	 * 
+	 * @param value
+	 *            the value to hash
+	 * 
+	 * @return the hash that can be used to confirm the a value
+	 * 
+	 * @throws RuntimeException
+	 *             if UTF-8 support is not available (!) or MD5 support is not
+	 *             available
+	 * @throws NullPointerException
+	 *             if email or pass is NULL
+	 */
+	static public String md5(String value) {
+		return hash("MD5", value);
+	}
+
+	/**
+	 * Hash the given value.
+	 * 
+	 * @param algo
+	 *            the hash algorithm to use ("MD5" and "SHA-512" are supported)
+	 * @param value
+	 *            the value to hash
+	 * 
+	 * @return the hash that can be used to confirm a value
+	 * 
+	 * @throws RuntimeException
+	 *             if UTF-8 support is not available (!) or the algorithm
+	 *             support is not available
+	 * @throws NullPointerException
+	 *             if email or pass is NULL
+	 */
+	static private String hash(String algo, String value) {
+		try {
+			MessageDigest md = MessageDigest.getInstance(algo);
+			md.update(value.getBytes("UTF-8"));
+			byte byteData[] = md.digest();
+
+			StringBuffer hexString = new StringBuffer();
+			for (int i = 0; i < byteData.length; i++) {
+				String hex = Integer.toHexString(0xff & byteData[i]);
+				if (hex.length() % 2 == 1)
+					hexString.append('0');
+				hexString.append(hex);
+			}
+
+			return hexString.toString();
+		} catch (NoSuchAlgorithmException e) {
+			throw new RuntimeException(algo + " hashing not available", e);
+		} catch (UnsupportedEncodingException e) {
+			throw new RuntimeException(
+					"UTF-8 encoding is required in a compatible JVM", e);
+		}
+	}
+}