Make hmac use bytes.  Make test_hmac pass.
diff --git a/Lib/test/test_hmac.py b/Lib/test/test_hmac.py
index d28490d..b453f04 100644
--- a/Lib/test/test_hmac.py
+++ b/Lib/test/test_hmac.py
@@ -12,31 +12,31 @@
             h = hmac.HMAC(key, data)
             self.assertEqual(h.hexdigest().upper(), digest.upper())
 
-        md5test(chr(0x0b) * 16,
-                "Hi There",
+        md5test(b"\x0b" * 16,
+                b"Hi There",
                 "9294727A3638BB1C13F48EF8158BFC9D")
 
-        md5test("Jefe",
-                "what do ya want for nothing?",
+        md5test(b"Jefe",
+                b"what do ya want for nothing?",
                 "750c783e6ab0b503eaa86e310a5db738")
 
-        md5test(chr(0xAA)*16,
-                chr(0xDD)*50,
+        md5test(b"\xaa" * 16,
+                b"\xdd" * 50,
                 "56be34521d144c88dbb8c733f0e8b3f6")
 
         md5test("".join([chr(i) for i in range(1, 26)]),
-                chr(0xCD) * 50,
+                b"\xcd" * 50,
                 "697eaf0aca3a3aea3a75164746ffaa79")
 
         md5test(chr(0x0C) * 16,
                 "Test With Truncation",
                 "56461ef2342edc00f9bab995690efd4c")
 
-        md5test(chr(0xAA) * 80,
+        md5test(b"\xaa" * 80,
                 "Test Using Larger Than Block-Size Key - Hash Key First",
                 "6b1ab7fe4bd7bf8f0b62e6ce61b9d0cd")
 
-        md5test(chr(0xAA) * 80,
+        md5test(b"\xaa" * 80,
                 ("Test Using Larger Than Block-Size Key "
                  "and Larger Than One Block-Size Data"),
                 "6f630fad67cda0ee1fb1f562db3aa53e")
@@ -46,33 +46,33 @@
             h = hmac.HMAC(key, data, digestmod=sha1)
             self.assertEqual(h.hexdigest().upper(), digest.upper())
 
-        shatest(chr(0x0b) * 20,
-                "Hi There",
+        shatest(b"\x0b" * 20,
+                b"Hi There",
                 "b617318655057264e28bc0b6fb378c8ef146be00")
 
-        shatest("Jefe",
-                "what do ya want for nothing?",
+        shatest(b"Jefe",
+                b"what do ya want for nothing?",
                 "effcdf6ae5eb2fa2d27416d5f184df9c259a7c79")
 
-        shatest(chr(0xAA)*20,
-                chr(0xDD)*50,
+        shatest(b"\xAA" * 20,
+                b"\xDD" * 50,
                 "125d7342b9ac11cd91a39af48aa17b4f63f175d3")
 
-        shatest("".join([chr(i) for i in range(1, 26)]),
-                chr(0xCD) * 50,
+        shatest(bytes(range(1, 26)),
+                b"\xCD" * 50,
                 "4c9007f4026250c6bc8414f9bf50c86c2d7235da")
 
         shatest(chr(0x0C) * 20,
                 "Test With Truncation",
                 "4c1a03424b55e07fe7f27be1d58bb9324a9a5a04")
 
-        shatest(chr(0xAA) * 80,
-                "Test Using Larger Than Block-Size Key - Hash Key First",
+        shatest(b"\xAA" * 80,
+                b"Test Using Larger Than Block-Size Key - Hash Key First",
                 "aa4ae5e15272d00e95705637ce8a3b55ed402112")
 
-        shatest(chr(0xAA) * 80,
-                ("Test Using Larger Than Block-Size Key "
-                 "and Larger Than One Block-Size Data"),
+        shatest(b"\xAA" * 80,
+                (b"Test Using Larger Than Block-Size Key "
+                 b"and Larger Than One Block-Size Data"),
                 "e8e99d0f45237d786d6bbaa7965c7808bbff1a91")