Fixes to compiler warnings in MSVC

firmware/lib/cryptolib/rsa_utility.c

 /* Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  *
  * Implementation of RSA utility functions.
  */
 
 #include "cryptolib.h"
 #include "stateful_util.h"
 #include "utility.h"
@@ skipping 76 matching lines @@
   sig_size = siglen_map[algorithm];
 
   if (key_blob && !key)
     verification_key = RSAPublicKeyFromBuf(key_blob, key_size);
   else if (!key_blob && key)
     verification_key = (RSAPublicKey*) key;  /* Supress const warning. */
   else
     return 0; /* Both can't be NULL or non-NULL. */
 
   digest = DigestBuf(buf, len, algorithm);
-  success = RSAVerify(verification_key, sig, sig_size, algorithm, digest);
+  success = RSAVerify(verification_key, sig, (uint32_t)sig_size,
+                      (uint8_t)algorithm, digest);
 
   Free(digest);
   if (!key)
     RSAPublicKeyFree(verification_key);  /* Only free if we allocated it. */
   return success;
 }
 
 /* Version of RSAVerifyBinary_f() where instead of the raw binary blob
  * of data, its digest is passed as the argument. */
 int RSAVerifyBinaryWithDigest_f(const uint8_t* key_blob,
@@ skipping 11 matching lines @@
   key_size = RSAProcessedKeySize(algorithm);
   sig_size = siglen_map[algorithm];
 
   if (key_blob && !key)
     verification_key = RSAPublicKeyFromBuf(key_blob, key_size);
   else if (!key_blob && key)
     verification_key = (RSAPublicKey*) key;  /* Supress const warning. */
   else
     return 0; /* Both can't be NULL or non-NULL. */
 
-  success = RSAVerify(verification_key, sig, sig_size, algorithm, digest);
+  success = RSAVerify(verification_key, sig, (uint32_t)sig_size,
+                      (uint8_t)algorithm, digest);
 
   if (!key)
     RSAPublicKeyFree(verification_key);  /* Only free if we allocated it. */
   return success;
 }