Pass LUKS password as needed when resizing open mapping (#59)

This is the final piece which enables GParted to pass the LUKS
passphrase when resizing an open LUKS encryption mapping when
'cryptsetup resize' will prompt for it.

Closes #59 - Resize of LUKS2 encrypted file system fails with "Nothing
             to read on input"

src/luks.cc

@@ -16,6 +16,7 @@
 
 #include "FileSystem.h"
 #include "LUKS_Info.h"
+#include "PasswordRAMStore.h"
 #include "Utils.h"
 #include "luks.h"
 
@@ -158,8 +159,12 @@ bool luks::resize( const Partition & partition_new, OperationDetail & operationd
 		// device sector size.
 		size = "--size " + Utils::num_to_str( ( partition_new.get_byte_length() - mapping.offset ) / 512LL ) + " ";
 
-	return ! execute_command( "cryptsetup -v " + size + "resize " + Glib::shell_quote( mapping.name ),
-	                          operationdetail, EXEC_CHECK_STATUS );
+	const char *pw = NULL;
+	if (mapping.key_loc == KEYLOC_KeyRing)
+		pw = PasswordRAMStore::lookup(partition_new.uuid);
+
+	return ! execute_command("cryptsetup -v " + size + "resize " + Glib::shell_quote(mapping.name),
+	                         pw, operationdetail, EXEC_CHECK_STATUS);
 }
 
 } //GParted

tests/Makefile.am

@@ -40,6 +40,7 @@ test_SupportedFileSystems_LDADD   =  \
 	$(top_builddir)/src/Partition.$(OBJEXT)             \
 	$(top_builddir)/src/PartitionLUKS.$(OBJEXT)         \
 	$(top_builddir)/src/PartitionVector.$(OBJEXT)       \
+	$(top_builddir)/src/PasswordRAMStore.$(OBJEXT)      \
 	$(top_builddir)/src/PipeCapture.$(OBJEXT)           \
 	$(top_builddir)/src/Proc_Partitions_Info.$(OBJEXT)  \
 	$(top_builddir)/src/ProgressBar.$(OBJEXT)           \