Fix RSA verification test.

I previously refactored some of the signature generation code to directly use the OpenSSL library instead of invoking the "openssl" command line utility. The signature_digest command line utility got lost in the process. This restores the utility which in turn fixes the RSA verification test.

Review URL: http://codereview.chromium.org/669040

tests/Makefile

@@ -3,7 +3,7 @@
 # found in the LICENSE file.
 
 CC ?= gcc
-CFLAGS = -Wall -DNDEBUG
+CFLAGS = -Wall -DNDEBUG -O3
 INCLUDES ?= -I../include/
 TOP ?= ../
 

tests/run_rsa_tests.sh

@@ -26,8 +26,8 @@ function generate_signatures {
   do
     for hashalgo in ${hash_algos[@]}
     do
-      ${UTIL_DIR}/signature_digest $algorithmcounter $1 | openssl rsautl -sign \
-        -pkcs -inkey ${KEY_DIR}/key_rsa${keylen}.pem \
+      ${UTIL_DIR}/signature_digest_utility $algorithmcounter $1 | openssl \
+        rsautl -sign -pkcs -inkey ${KEY_DIR}/key_rsa${keylen}.pem \
         > $1.rsa${keylen}\_${hashalgo}.sig
       let algorithmcounter=algorithmcounter+1
     done