Vboot Reference: Add the "real" reference firmware verification function (VerifyFirmware).

src/platform/vboot_reference/utils/signature_digest.c

Index: src/platform/vboot_reference/utils/signature_digest.c
diff --git a/src/platform/vboot_reference/utils/signature_digest.c b/src/platform/vboot_reference/utils/signature_digest.c
index 8dcd8c91e59737e51d42f3480dae4bf30a0109f6..100f7ecbf6fa3957ee9c4aa104889348fcf48b47 100644
--- a/src/platform/vboot_reference/utils/signature_digest.c
+++ b/src/platform/vboot_reference/utils/signature_digest.c
@@ -21,7 +21,7 @@
 #include "sha.h"
 #include "sha_utility.h"
 
-uint8_t* prepend_digestinfo(int algorithm, uint8_t* digest) {
+uint8_t* PrependDigestInfo(int algorithm, uint8_t* digest) {
   const int digest_size = hash_size_map[algorithm];
   const int digestinfo_size = digestinfo_size_map[algorithm];
   const uint8_t* digestinfo = hash_digestinfo_map[algorithm];
@@ -55,7 +55,7 @@ int main(int argc, char* argv[]) {
   if (!(digest = DigestFile(argv[2], algorithm)))
     goto failure;
 
-  info_digest = prepend_digestinfo(algorithm, digest);
+  info_digest = PrependDigestInfo(algorithm, digest);
   write(1, info_digest, hash_size_map[algorithm] +
         digestinfo_size_map[algorithm]);