8286395: Address possibly lossy conversions in java.security.jgss

Reviewed-by: chegar

Author: rjernst

src/java.security.jgss/share/classes/sun/security/krb5/internal/crypto/Des.java

@@ -272,15 +272,15 @@ public static long char_to_key(char[] passwdChars) throws KrbCryptoException {
         key = set_parity(key);
         if (bad_key(key)) {
             byte [] temp = long2octet(key);
-            temp[7] ^= 0xf0;
+            temp[7] ^= (byte) 0xf0;
             key = octet2long(temp);
         }
 
         newkey = des_cksum(long2octet(key), passwdBytes, long2octet(key));
         key = octet2long(set_parity(newkey));
         if (bad_key(key)) {
             byte [] temp = long2octet(key);
-            temp[7] ^= 0xf0;
+            temp[7] ^= (byte) 0xf0;
             key = octet2long(temp);
         }
 

src/java.security.jgss/share/classes/sun/security/krb5/internal/crypto/dk/Des3DkCrypto.java

@@ -157,7 +157,7 @@ private static byte[] des3Expand(byte[] input, int start, int end) {
             }
             ++posn;
             if (bit != 0) {
-                last |= (bit<<posn);
+                last |= (byte) (bit<<posn);
             }
         }