diff -ruN a/src/libjasper/jp2/jp2_cod.c b/src/libjasper/jp2/jp2_cod.c
--- a/src/libjasper/jp2/jp2_cod.c	2007-01-20 05:43:05.000000000 +0800
+++ b/src/libjasper/jp2/jp2_cod.c	2007-03-06 21:49:58.000000000 +0800
@@ -5,6 +5,11 @@
  * All rights reserved.
  */
 
+/*
+ * Modified by Andrey Kiselev <dron at ak4719.spb.edu> to properly handle UUID
+ * box.
+ */
+
 /* __START_OF_JASPER_LICENSE__
  * 
  * JasPer License Version 2.0
@@ -127,6 +132,9 @@
 static int jp2_pclr_getdata(jp2_box_t *box, jas_stream_t *in);
 static int jp2_pclr_putdata(jp2_box_t *box, jas_stream_t *out);
 static void jp2_pclr_dumpdata(jp2_box_t *box, FILE *out);
+static void jp2_uuid_destroy(jp2_box_t *box);
+static int jp2_uuid_getdata(jp2_box_t *box, jas_stream_t *in);
+static int jp2_uuid_putdata(jp2_box_t *box, jas_stream_t *out);
 
 /******************************************************************************\
 * Local data.
@@ -164,7 +172,7 @@
 	{JP2_BOX_XML, "XML", 0,
 	  {0, 0, 0, 0, 0}},
 	{JP2_BOX_UUID, "UUID", 0,
-	  {0, 0, 0, 0, 0}},
+	  {0, jp2_uuid_destroy, jp2_uuid_getdata, jp2_uuid_putdata, 0}},
 	{JP2_BOX_UINF, "UINF", JP2_BOX_SUPER,
 	  {0, 0, 0, 0, 0}},
 	{JP2_BOX_ULST, "ULST", 0,
@@ -271,7 +279,7 @@
 	} else {
 		box->datalen = box->len - JP2_BOX_HDRLEN(false);
 	}
-	if (box->len != 0 && box->len < 8) {
+	if (box->len != 0 && box->len < JP2_BOX_HDRLEN(false)) {
 		goto error;
 	}
 
@@ -876,6 +884,56 @@
 	}
 }
 
+static void jp2_uuid_destroy(jp2_box_t *box)
+{
+	jp2_uuid_t *uuid = &box->data.uuid;
+	if (uuid->data)
+	{
+	    jas_free(uuid->data);
+	    uuid->data = NULL;
+	}
+}
+
+static int jp2_uuid_getdata(jp2_box_t *box, jas_stream_t *in)
+{
+	jp2_uuid_t *uuid = &box->data.uuid;
+	int i;
+	
+	for (i = 0; i < 16; i++)
+	{
+	    if (jp2_getuint8(in, &uuid->uuid[i]))
+		return -1;
+	}
+	
+	uuid->datalen = box->datalen - 16;
+	uuid->data = jas_malloc(uuid->datalen * sizeof(uint_fast8_t));
+	for (i = 0; i < uuid->datalen; i++)
+	{
+	    if (jp2_getuint8(in, &uuid->data[i]))
+		return -1;
+	}
+	return 0;
+}
+
+static int jp2_uuid_putdata(jp2_box_t *box, jas_stream_t *out)
+{
+	jp2_uuid_t *uuid = &box->data.uuid;
+	int i;
+	
+	for (i = 0; i < 16; i++)
+	{
+	    if (jp2_putuint8(out, uuid->uuid[i]))
+		return -1;
+	}
+	
+	for (i = 0; i < uuid->datalen; i++)
+	{
+	    if (jp2_putuint8(out, uuid->data[i]))
+		return -1;
+	}
+	return 0;
+}
+
 static int jp2_getint(jas_stream_t *in, int s, int n, int_fast32_t *val)
 {
 	int c;
diff -ruN a/src/libjasper/jp2/jp2_cod.h b/src/libjasper/jp2/jp2_cod.h
--- a/src/libjasper/jp2/jp2_cod.h	2007-01-20 05:43:05.000000000 +0800
+++ b/src/libjasper/jp2/jp2_cod.h	2007-03-06 21:49:58.000000000 +0800
@@ -5,6 +5,11 @@
  * All rights reserved.
  */
 
+/*
+ * Modified by Andrey Kiselev <dron at ak4719.spb.edu> to properly handle UUID
+ * box.
+ */
+
 /* __START_OF_JASPER_LICENSE__
  * 
  * JasPer License Version 2.0
@@ -229,6 +234,12 @@
 	jp2_cmapent_t *ents;
 } jp2_cmap_t;
 
+typedef struct {
+	uint_fast32_t datalen;
+	uint_fast8_t uuid[16];
+	uint_fast8_t *data;
+} jp2_uuid_t;
+
 #define	JP2_CMAP_DIRECT		0
 #define	JP2_CMAP_PALETTE	1
 
@@ -257,6 +268,7 @@
 		jp2_pclr_t pclr;
 		jp2_cdef_t cdef;
 		jp2_cmap_t cmap;
+		jp2_uuid_t uuid;
 	} data;
 
 } jp2_box_t;
diff -ruN a/src/libjasper/jp2/jp2_enc.c b/src/libjasper/jp2/jp2_enc.c
--- a/src/libjasper/jp2/jp2_enc.c	2007-01-20 05:43:05.000000000 +0800
+++ b/src/libjasper/jp2/jp2_enc.c	2007-03-06 21:49:58.000000000 +0800
@@ -5,6 +5,11 @@
  * All rights reserved.
  */
 
+/*
+ * Modified by Andrey Kiselev <dron at ak4719.spb.edu> to properly handle UUID
+ * box.
+ */
+
 /* __START_OF_JASPER_LICENSE__
  * 
  * JasPer License Version 2.0
@@ -86,7 +91,7 @@
 * Functions.
 \******************************************************************************/
 
-int jp2_encode(jas_image_t *image, jas_stream_t *out, const char *optstr)
+int jp2_write_header(jas_image_t *image, jas_stream_t *out)
 {
 	jp2_box_t *box;
 	jp2_ftyp_t *ftyp;
@@ -97,8 +102,6 @@
 	long len;
 	uint_fast16_t cmptno;
 	jp2_colr_t *colr;
-	char buf[4096];
-	uint_fast32_t overhead;
 	jp2_cdefchan_t *cdefchanent;
 	jp2_cdef_t *cdef;
 	int i;
@@ -326,6 +329,26 @@
 	jas_stream_close(tmpstream);
 	tmpstream = 0;
 
+	return 0;
+	abort();
+
+error:
+
+	if (box) {
+		jp2_box_destroy(box);
+	}
+	if (tmpstream) {
+		jas_stream_close(tmpstream);
+	}
+	return -1;
+}
+
+int jp2_write_codestream(jas_image_t *image, jas_stream_t *out, const char *optstr)
+{
+	jp2_box_t *box;
+	char buf[4096];
+	uint_fast32_t overhead;
+
 	/*
 	 * Output the contiguous code stream box.
 	 */
@@ -358,12 +381,34 @@
 	if (box) {
 		jp2_box_destroy(box);
 	}
-	if (tmpstream) {
-		jas_stream_close(tmpstream);
-	}
 	return -1;
 }
 
+int jp2_encode(jas_image_t *image, jas_stream_t *out, const char *optstr)
+{
+	if (jp2_write_header(image, out) < 0)
+		return -1;
+	if (jp2_write_codestream(image, out, optstr) < 0)
+		return -1;
+
+	return 0;
+}
+
+int jp2_encode_uuid(jas_image_t *image, jas_stream_t *out,
+		    const char *optstr, jp2_box_t *uuid)
+{
+	if (jp2_write_header(image, out) < 0)
+		return -1;
+	if (uuid) {
+		if (jp2_box_put(uuid, out))
+			return -1;
+	}
+	if (jp2_write_codestream(image, out, optstr) < 0)
+		return -1;
+
+	return 0;
+}
+
 static uint_fast32_t jp2_gettypeasoc(int colorspace, int ctype)
 {
 	int type;
diff -Naur a/src/libjasper/include/jasper/jas_image.h b/src/libjasper/include/jasper/jas_image.h
--- a/src/libjasper/include/jasper/jas_image.h	2017-05-19 03:21:50.000000000 +0300
+++ b/src/libjasper/include/jasper/jas_image.h	2017-09-11 08:56:10.654417700 +0300
@@ -552,6 +552,7 @@
 JAS_DLLEXPORT jas_image_t *jp2_decode(jas_stream_t *in, const char *optstr);
 JAS_DLLEXPORT int jp2_encode(jas_image_t *image, jas_stream_t *out, const char *optstr);
 JAS_DLLEXPORT int jp2_validate(jas_stream_t *in);
+JAS_DLLEXPORT int jp2_encode_uuid(jas_image_t *image, jas_stream_t *out, const char *optstr, jp2_box_t *uuid);
 #endif
 
 #if !defined(EXCLUDE_JPC_SUPPORT)