diff --git a/ndn-cpp/c/util/DynamicUCharArray.c b/ndn-cpp/c/util/DynamicUCharArray.c
new file mode 100644
index 0000000..ac1e451
--- /dev/null
+++ b/ndn-cpp/c/util/DynamicUCharArray.c
@@ -0,0 +1,13 @@
+/* 
+ * Author: Jeff Thompson
+ *
+ * BSD license, See the LICENSE file for more information.
+ */
+
+#include "DynamicUCharArray.h"
+
+char *ndn_DynamicUCharArray_reallocArray(struct ndn_DynamicUCharArray *self, unsigned int length)
+{
+  // TODO: implement.
+  return "ndn_DynamicUCharArray_reallocArray: realloc function pointer not supplied";
+}
\ No newline at end of file
diff --git a/ndn-cpp/c/util/DynamicUCharArray.h b/ndn-cpp/c/util/DynamicUCharArray.h
new file mode 100644
index 0000000..67060fa
--- /dev/null
+++ b/ndn-cpp/c/util/DynamicUCharArray.h
@@ -0,0 +1,79 @@
+/* 
+ * Author: Jeff Thompson
+ *
+ * BSD license, See the LICENSE file for more information.
+ */
+
+#ifndef NDN_DYNAMICUCHARARRAY_H
+#define	NDN_DYNAMICUCHARARRAY_H
+
+#include "ndn_memory.h"
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+struct ndn_DynamicUCharArray {
+  unsigned char *array; /**< the allocated array buffer */
+  unsigned int length;  /**< the length of the allocated array buffer */
+  unsigned char (*realloc)(unsigned char *array, unsigned int length); /**< a pointer to a function that reallocates array and returns a new buffer of
+                                                                        * length bytes or 0 for error.  The original array pointer is no longer used.
+                                                                        * This may be 0 (which causes an error if a reallocate is necessary). */
+};
+
+/**
+ * Initialize an ndn_DynamicUCharArray struct with the given array buffer.
+ * @param self pointer to the ndn_DynamicUCharArray struct
+ * @param array the allocated array buffer
+ * @param length the length of the allocated array buffer
+ * @param reallocFunction see ndn_DynamicUCharArray_ensureLength.  This may be 0.
+ */
+static inline void ndn_DynamicUCharArray_init
+  (struct ndn_DynamicUCharArray *self, unsigned char *array, unsigned int length, unsigned char (*reallocFunction)(unsigned char *, unsigned int)) 
+{
+  self->array = array;
+  self->length = length;
+  self->realloc = reallocFunction;
+}
+
+char *ndn_DynamicUCharArray_reallocArray(struct ndn_DynamicUCharArray *self, unsigned int length);
+
+/**
+ * Ensure that self->length is greater than or equal to length.  If it is, just return 0 for success.
+ * Otherwise, if the self->realloc function pointer is null, then return an error.
+ * If not null, call self->realloc to reallocate self->array, and update self->length (which may be greater than length).
+ * @param self pointer to the ndn_DynamicUCharArray struct
+ * @param length the needed minimum size for self->length
+ * @return 0 for success, else an error string if need to reallocate the array but can't
+ */
+static inline char *ndn_DynamicUCharArray_ensureLength(struct ndn_DynamicUCharArray *self, unsigned int length) 
+{
+  if (self->length >= length)
+    return 0;
+
+  return ndn_DynamicUCharArray_reallocArray(self, length);
+}
+
+/**
+ * Copy value into self->array at offset, using ndn_DynamicUCharArray_ensureLength to make sure self->array has enough length.
+ * @param self pointer to the ndn_DynamicUCharArray struct
+ * @param value the buffer to copy from
+ * @param valueLength the length of the value buffer
+ * @param offset the offset in self->array to copy to
+ * @return 0 for success, else an error string if need to reallocate the array but can't
+ */
+static inline char *ndn_DynamicUCharArray_set
+  (struct ndn_DynamicUCharArray *self, unsigned char *value, unsigned int valueLength, unsigned int offset) 
+{
+  char *error;
+  if (error = ndn_DynamicUCharArray_ensureLength(self, valueLength + offset))
+    return error;
+  ndn_memcpy(self->array + offset, value, valueLength);
+};
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif
+
diff --git a/ndn-cpp/c/util/ndn_memory.c b/ndn-cpp/c/util/ndn_memory.c
new file mode 100644
index 0000000..8699309
--- /dev/null
+++ b/ndn-cpp/c/util/ndn_memory.c
@@ -0,0 +1,31 @@
+/* 
+ * Author: Jeff Thompson
+ *
+ * BSD license, See the LICENSE file for more information.
+ */
+
+#include "ndn_memory.h"
+
+#if !HAVE_MEMCPY
+void ndn_memcpy(unsigned char *dest, unsigned char *src, unsigned int len)
+{
+  unsigned int i;
+  
+  for (i = 0; i < len; i++)
+    dest[i] = src[i];
+}
+#else
+int ndn_memcpy_stub_to_avoid_empty_file_warning = 0;
+#endif
+
+#if !HAVE_MEMSET
+void ndn_memset(unsigned char *dest, int val, unsigned int len)
+{
+  unsigned int i;
+  
+  for (i = 0; i < len; i++)
+    dest[i] = (unsigned char)val;
+}
+#else
+int ndn_memset_stub_to_avoid_empty_file_warning = 0;
+#endif
\ No newline at end of file
diff --git a/ndn-cpp/c/util/ndn_memory.h b/ndn-cpp/c/util/ndn_memory.h
new file mode 100644
index 0000000..9051a02
--- /dev/null
+++ b/ndn-cpp/c/util/ndn_memory.h
@@ -0,0 +1,51 @@
+/* 
+ * Author: Jeff Thompson
+ *
+ * BSD license, See the LICENSE file for more information.
+ */
+
+/*
+ * Based on HAVE_MEMCPY and HAVE_MEMSET in config.h, use the library version or a local implementation of memcpy and memset.
+ */
+
+#ifndef NDN_MEMORY_H
+#define	NDN_MEMORY_H
+
+#include "../../../config.h"
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+#if HAVE_MEMCPY
+#include <memory.h>
+/**
+ * Use the library version of memcpy.
+ */
+static inline void ndn_memcpy(unsigned char *dest, unsigned char *src, unsigned int len) { memcpy(dest, src, len); }
+#else
+/**
+ * Use a local implementation of memcpy instead of the library version.
+ */
+void ndn_memcpy(unsigned char *dest, unsigned char *src, unsigned int len);
+#endif
+
+#if HAVE_MEMSET
+#include <memory.h>
+/**
+ * Use the library version of memset.
+ */
+static inline void ndn_memset(unsigned char *dest, int val, unsigned int len) { memset(dest, val, len); }
+#else
+/**
+ * Use a local implementation of memset instead of the library version.
+ */
+void ndn_memset(unsigned char *dest, int val, unsigned int len);
+#endif
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif
+