diff options
Diffstat (limited to 'OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/helper/OtherHelper.java')
-rw-r--r-- | OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/helper/OtherHelper.java | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/helper/OtherHelper.java b/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/helper/OtherHelper.java index 34d90a17f..292b5bf3d 100644 --- a/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/helper/OtherHelper.java +++ b/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/helper/OtherHelper.java @@ -17,6 +17,9 @@ package org.sufficientlysecure.keychain.helper; +import java.security.DigestException; +import java.security.MessageDigest; +import java.security.NoSuchAlgorithmException; import java.util.Iterator; import java.util.Set; @@ -58,4 +61,23 @@ public class OtherHelper { } } + /** + * Converts the given bytes to a unique RGB color using SHA1 algorithm + * @param bytes + * @return an integer array containing 3 numeric color representations (Red, Green, Black) + * @throws NoSuchAlgorithmException + * @throws DigestException + */ + public static int[] getRgbForData(byte[] bytes) throws NoSuchAlgorithmException, DigestException { + MessageDigest md = MessageDigest.getInstance("SHA1"); + + md.update(bytes); + byte[] digest = md.digest(); + + int[] result = {((int) digest[0] + 256) % 256, + ((int) digest[1] + 256) % 256, + ((int) digest[2] + 256) % 256}; + return result; + } + } |