Add function for generating validation signatures.

src/trusted/validator/caching/build.scons

Index: src/trusted/validator/caching/build.scons
diff --git a/src/trusted/validator/caching/build.scons b/src/trusted/validator/caching/build.scons
new file mode 100644
index 0000000000000000000000000000000000000000..a0f8f7ca1abc0e5f4134abbf36fd65a9e6a525c8
--- /dev/null
+++ b/src/trusted/validator/caching/build.scons
@@ -0,0 +1,30 @@
+# -*- python -*-
+# Copyright (c) 2012 The Native Client Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+Import('env')
+
+gtest_env = env.MakeGTestEnv()
+
+if env.Bit('target_x86'):
+  validator_libs = [gtest_env.NaClTargetArchSuffix('ncval_base')]
+else:
+  validator_libs = ['arm_validator_core']
+
+gtest_env.Append(CPPPATH=[
+    '${SCONSTRUCT_DIR}/../third_party/openssl',
+    '${SCONSTRUCT_DIR}/../third_party/openssl/openssl/crypto'])
+
+validation_caching_test_exe = gtest_env.ComponentProgram(
+    'validation_caching_test',
+    ['validation_caching_test.cc',
+     'validation_signature.cc',
+     '${SCONSTRUCT_DIR}/../third_party/openssl/openssl/crypto/sha/sha256.c'],
+    EXTRA_LIBS=validator_libs)
+
+node = gtest_env.CommandTest(
+    'validation_caching_test.out',
+    command=[validation_caching_test_exe])
+
+env.AddNodeToTestSuite(node, ['small_tests'], 'run_validation_caching_test')