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 | 203 |
1 files changed, 203 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..1fcc18a --- /dev/null +++ b/src/main/java/org/uic/barcode/utils/SecurityUtils.java @@ -0,0 +1,203 @@ +package org.uic.barcode.utils;
+
+import java.security.KeyFactory;
+import java.security.NoSuchAlgorithmException;
+import java.security.PrivateKey;
+import java.security.Provider;
+import java.security.Provider.Service;
+import java.security.PublicKey;
+import java.security.Security;
+import java.security.spec.InvalidKeySpecException;
+import java.security.spec.PKCS8EncodedKeySpec;
+import java.security.spec.X509EncodedKeySpec;
+
+/**
+ * The Class SecurityUtils.
+ */
+public class SecurityUtils {
+
+ /**
+ * Find provider by public key.
+ *
+ * @param algorithmOid the algorithm oid used to generate the key
+ * @param keyBytes the encoded bytes of the public key
+ * @return the provider
+ */
+ public static Provider findPublicKeyProvider(String keyAlgorithmOid, byte[] keyBytes) {
+
+
+ X509EncodedKeySpec keySpec = new X509EncodedKeySpec(keyBytes);
+
+ String name;
+ try {
+ name = AlgorithmNameResolver.getAlgorithmName(AlgorithmNameResolver.TYPE_KEY_GENERATOR_ALG, keyAlgorithmOid, null);
+ } catch (Exception e2) {
+ 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 provider;
+ } catch (Exception e) {
+ provider = null;
+ //try next
+ }
+ }
+ }
+
+ return null;
+ }
+
+ /**
+ * Find private key provider.
+ *
+ * @param key the private key
+ * @return the provider
+ */
+ 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;
+ }
+
+
+
+ /**
+ * Convert.
+ *
+ * @param key the key
+ * @param provider the provider
+ * @return the public key
+ */
+ public static PublicKey convert(PublicKey key, Provider provider) {
+
+ PublicKey publicKey;
+ KeyFactory keyFactory = null;
+
+ try {
+ if (key.getAlgorithm() != null && key.getAlgorithm().toUpperCase().contains("EC") ) {
+ keyFactory = KeyFactory.getInstance("EC",provider);
+ } else if (key.getAlgorithm() != null && key.getAlgorithm().length() > 0 ) {
+ keyFactory = KeyFactory.getInstance("DSA",provider);
+ } else {
+ return key;
+ }
+ publicKey = keyFactory.generatePublic(new X509EncodedKeySpec(key.getEncoded()));
+ } catch (InvalidKeySpecException | NoSuchAlgorithmException e) {
+ return key;
+ }
+
+ return publicKey;
+
+
+ }
+
+
+ /**
+ * Convert.
+ *
+ * @param key the key
+ * @param provider the provider
+ * @return the private key
+ */
+ public static PrivateKey convert(PrivateKey key, Provider provider) {
+
+ PrivateKey privateKey;
+ KeyFactory keyFactory = null;
+
+ try {
+ if (key.getAlgorithm() != null && key.getAlgorithm().toUpperCase().contains("EC") ) {
+ keyFactory = KeyFactory.getInstance("EC",provider);
+ } else if (key.getAlgorithm() != null && key.getAlgorithm().length() > 0 ) {
+ keyFactory = KeyFactory.getInstance("DSA",provider);
+ } else {
+ return key;
+ }
+ privateKey = keyFactory.generatePrivate(new PKCS8EncodedKeySpec(key.getEncoded()));
+ } catch (InvalidKeySpecException | NoSuchAlgorithmException e) {
+ return key;
+ }
+
+ return privateKey;
+
+
+ }
+
+ /**
+ * Find signature provider.
+ *
+ * @param encoded the encoded
+ * @param oid the oid
+ * @return the provider
+ */
+ public static Provider findSignatureProvider(byte[] encoded, String oid) {
+
+ KeyFactory keyFactory = null;
+ String signatureAlgorithmName = null;
+
+ Provider[] provs = Security.getProviders();
+ for (Provider provider : provs) {
+ try {
+ Service service = provider.getService(AlgorithmNameResolver.TYPE_SIGNATURE_ALG, oid);
+ if (service != null) {
+ signatureAlgorithmName = service.getAlgorithm();
+ if (signatureAlgorithmName != null && signatureAlgorithmName.length() > 0) {
+ if (signatureAlgorithmName.toUpperCase().contains("EC") ) {
+ keyFactory = KeyFactory.getInstance("EC",provider);
+ } else {
+ keyFactory = KeyFactory.getInstance("DSA",provider);
+ }
+ if (keyFactory != null) {
+ X509EncodedKeySpec spec = new X509EncodedKeySpec(encoded);
+ //try to encode the key
+ keyFactory.generatePublic(spec);
+ }
+ }
+ }
+ } catch (Exception e1) {
+ keyFactory = null;
+ }
+ if (keyFactory != null) {
+ return keyFactory.getProvider();
+ }
+ }
+
+ return null;
+ }
+}
|