Increase random data provider support

Add a method to get the current random data provider, and document and
test the method for resetting it.

1 files changed, 9 insertions, 0 deletions

diff --git a/libqpdf/QUtil.cc b/libqpdf/QUtil.cc
index c5fe535c..39ce4088 100644
--- a/libqpdf/QUtil.cc
+++ b/libqpdf/QUtil.cc
@@ -423,6 +423,8 @@ initialize_random_data_provider()
             random_data_provider = insecure_random_data_provider;
         }
     }
+    // QUtil.hh has comments indicating that getRandomDataProvider(),
+    // which calls this method, never returns null.
     if (random_data_provider == 0)
     {
         throw std::logic_error("QPDF has no random data provider");
@@ -435,6 +437,13 @@ QUtil::setRandomDataProvider(RandomDataProvider* p)
     random_data_provider = p;
 }
 
+RandomDataProvider*
+QUtil::getRandomDataProvider()
+{
+    initialize_random_data_provider();
+    return random_data_provider;
+}
+
 void
 QUtil::initializeWithRandomBytes(unsigned char* data, size_t len)
 {