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 | 41 |
1 files changed, 39 insertions, 2 deletions
diff --git a/src/main/java/org/uic/barcode/utils/SecurityUtils.java b/src/main/java/org/uic/barcode/utils/SecurityUtils.java index 8c981af..8f19e4b 100644 --- a/src/main/java/org/uic/barcode/utils/SecurityUtils.java +++ b/src/main/java/org/uic/barcode/utils/SecurityUtils.java @@ -15,6 +15,8 @@ import java.security.spec.PKCS8EncodedKeySpec; import java.security.spec.X509EncodedKeySpec;
import java.util.Arrays;
+import org.uic.barcode.dynamicFrame.Constants;
+
/**
* The Class SecurityUtils.
*/
@@ -23,8 +25,8 @@ 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
+ * @param keyAlgorithmOid the key algorithm oid
+ * @param keyBytes the encoded bytes of the public key
* @return the provider
*/
public static Provider findPublicKeyProvider(String keyAlgorithmOid, byte[] keyBytes) {
@@ -263,6 +265,13 @@ public class SecurityUtils { return out.toByteArray();
}
+ /**
+ * Recombine dsa signature.
+ *
+ * @param sealdata the sealdata
+ * @return the byte[]
+ * @throws IOException Signals that an I/O exception has occurred.
+ */
public static byte[] recombineDsaSignature(byte[] sealdata) throws IOException {
//check whether the encoding is wrong and the sealdata contain a signature
@@ -311,4 +320,32 @@ public class SecurityUtils { return out.toByteArray();
}
+
+ /**
+ * Gets the dsa algorithm allowed for ssb or static frame.
+ *
+ * @param bs the size of the signature
+ * @return the dsa algorithm OID
+ */
+ public static String getDsaAlgorithm(byte[] bs) {
+
+ BigInteger[] bInts = null;
+ int size = 0;
+ try {
+ bInts = decodeSignatureIntegerSequence(bs);
+ int sizeR = bInts[0].bitLength();
+ int sizeS = bInts[1].bitLength();
+ size = Math.max(sizeR,sizeS);
+ } catch (Exception e) {
+ return null;
+ }
+
+ if (size > 224) {
+ return Constants.DSA_SHA256;
+ } else if (size > 160) {
+ return Constants.DSA_SHA224;
+ } else {
+ return Constants.DSA_SHA1;
+ }
+ }
}
|