diff options
Diffstat (limited to 'src/main/java/org/uic/barcode/utils/SecurityUtils.java')
| -rw-r--r-- | src/main/java/org/uic/barcode/utils/SecurityUtils.java | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/src/main/java/org/uic/barcode/utils/SecurityUtils.java b/src/main/java/org/uic/barcode/utils/SecurityUtils.java new file mode 100644 index 0000000..542208b --- /dev/null +++ b/src/main/java/org/uic/barcode/utils/SecurityUtils.java @@ -0,0 +1,129 @@ +package org.uic.barcode.utils;
+
+import java.security.KeyFactory;
+import java.security.NoSuchAlgorithmException;
+import java.security.PrivateKey;
+import java.security.Provider;
+import java.security.PublicKey;
+import java.security.Security;
+import java.security.spec.InvalidKeySpecException;
+import java.security.spec.PKCS8EncodedKeySpec;
+import java.security.spec.X509EncodedKeySpec;
+
+public class SecurityUtils {
+
+ public static KeyFactory findKeyFactory(String oid, byte[] keyBytes) {
+
+ X509EncodedKeySpec keySpec = new X509EncodedKeySpec(keyBytes);
+
+ String name = null;
+ try {
+ name = AlgorithmNameResolver.getName(AlgorithmNameResolver.TYPE_KEY_GENERATOR_ALG, oid);
+ } catch (Exception e2) {
+ return null;
+ }
+ if (name == null || name.length() == 0) {
+ return null;
+ }
+
+ KeyFactory keyFactory = null;
+
+ Provider[] provs = Security.getProviders();
+ for (Provider provider : provs) {
+ try {
+ keyFactory = KeyFactory.getInstance(name,provider);
+ } catch (NoSuchAlgorithmException e1) {
+ //try next
+ }
+ if (keyFactory != null) {
+ try {
+ keyFactory.generatePublic(keySpec);
+ return keyFactory;
+ } catch (Exception e) {
+ //try next
+ }
+ }
+ }
+ return null;
+
+ }
+
+
+ public static Provider findPrivateKeyProvider(PrivateKey key) {
+
+ String name = key.getAlgorithm();
+ byte[] keyBytes = key.getEncoded();
+
+
+ PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(keyBytes);
+
+
+ KeyFactory keyFactory = null;
+
+ Provider[] provs = Security.getProviders();
+ for (Provider provider : provs) {
+ try {
+ keyFactory = KeyFactory.getInstance(name,provider);
+ } catch (NoSuchAlgorithmException e1) {
+ //try next
+ }
+ if (keyFactory != null) {
+ try {
+ keyFactory.generatePrivate(keySpec);
+ return provider;
+ } catch (Exception e) {
+ provider = null;
+ //try next
+ }
+ }
+ }
+
+ return null;
+ }
+
+
+
+ public static PublicKey convertPublicKey(PublicKey key) {
+
+
+ PublicKey publicKey;
+ try {
+ publicKey = KeyFactory.getInstance("RSA").generatePublic(new X509EncodedKeySpec(key.getEncoded()));
+ } catch (InvalidKeySpecException | NoSuchAlgorithmException e) {
+ return key;
+ }
+
+ return publicKey;
+
+ }
+
+
+ public static PublicKey convert(PublicKey key, Provider provider) {
+
+ PublicKey publicKey;
+ try {
+ publicKey = KeyFactory.getInstance("RSA", provider).generatePublic(new X509EncodedKeySpec(key.getEncoded()));
+ } catch (InvalidKeySpecException | NoSuchAlgorithmException e) {
+ return key;
+ }
+
+ return publicKey;
+
+
+ }
+
+
+ public static PrivateKey convertPrivateKey(PrivateKey key) {
+
+
+ PrivateKey privateKey;
+ try {
+ privateKey = KeyFactory.getInstance("RSA").generatePrivate(new PKCS8EncodedKeySpec(key.getEncoded()));
+ } catch (InvalidKeySpecException | NoSuchAlgorithmException e) {
+ return key;
+ }
+
+ return privateKey;
+
+ }
+}
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