Replace GPLV3 MD5 with OpenSSL MD5

Ric asked me to look at replacing the GPL licensed MD5 code with
something better, i.e. perhaps faster, and with a less restrictive
license, etc. So I took a couple hour holiday from working on
wrapping up the client_t and did this.

OpenSSL (nee SSLeay) is released under the OpenSSL license, a BSD/MIT
style license. OpenSSL (libcrypto.so) is used on Linux, OS X and *BSD,
Open Solaris, etc. IOW it's universally available on the platforms we
care about. It's written by Eric Young (eay), now at EMC/RSA, and I
can say from experience that the OpenSSL implementation of MD5 (at least)
is every bit as fast as RSA's proprietary implementation (primarily
because the implementations are very, very similar.) The last time I
surveyed MD5 implementations I found they're all pretty much the same
speed.

I changed the APIs (and ABIs) for the strong and weak checksums.
Strictly speaking I didn't need to do that. They're only called on
short strings of data, i.e. pathnames, so using int32_t and uint32_t
is ostensibly okay. My change is arguably a better, more general API
for this sort of thing. It's also what bit me when gerrit/jenkins
validation failed due to glusterfs segv-ing. (I didn't pay close enough
attention to the implementation of the weak checksum. But it forced me
to learn what gerrit/jenkins are doing and going forward I can do better
testing before submitting to gerrit.)

Now resubmitting with a BZ

Change-Id: I545fade1604e74fc68399894550229bd57a5e0df
BUG: 807718
Signed-off-by: Kaleb KEITHLEY <kkeithle@redhat.com>
Reviewed-on: http://review.gluster.com/3019
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Jeff Darcy <jdarcy@redhat.com>

19 files changed, 100 insertions, 93 deletions

diff --git a/configure.ac b/configure.ac
index 6605deace1a..2d3dea10faf 100644
--- a/configure.ac
+++ b/configure.ac
@@ -198,8 +198,10 @@ fi
 
 AC_CHECK_TOOL([LD],[ld])
 
+AC_CHECK_LIB([crypto], [MD5], , AC_MSG_ERROR([OpenSSL crypto library is required to build glusterfs]))
+
 AC_CHECK_LIB([pthread], [pthread_mutex_init], , AC_MSG_ERROR([Posix threads library is required to build glusterfs]))
-		 
+
 AC_CHECK_FUNC([dlopen], [has_dlopen=yes], AC_CHECK_LIB([dl], [dlopen], , AC_MSG_ERROR([Dynamic linking library required to build glusterfs])))
 
 
@@ -207,6 +209,8 @@ AC_CHECK_HEADERS([sys/xattr.h])
 
 AC_CHECK_HEADERS([sys/extattr.h])
 
+AC_CHECK_HEADERS([openssl/md5.h])
+
 case $host_os in
   darwin*)
     if ! test "`/usr/bin/sw_vers | grep ProductVersion: | cut -f 2 | cut -d. -f2`" -ge 5; then
@@ -481,7 +485,7 @@ case $host_os in
 	GF_LDADD="${ARGP_STANDALONE_LDADD}"
 	if test "x$ac_cv_header_execinfo_h" = "xyes"; then
 	   GF_GLUSTERFS_LDFLAGS="-lexecinfo"
-	fi				      
+	fi
 	BUILD_FUSE_CLIENT=no
 	;;
      darwin*)
@@ -522,7 +526,7 @@ AC_SUBST(CONTRIBDIR)
 INCLUDES='-I$(top_srcdir)/libglusterfs/src -I$(CONTRIBDIR)/uuid'
 AC_SUBST(INCLUDES)
 
-AM_CONDITIONAL([GF_DARWIN_HOST_OS], test "${GF_HOST_OS}" = "GF_DARWIN_HOST_OS")	
+AM_CONDITIONAL([GF_DARWIN_HOST_OS], test "${GF_HOST_OS}" = "GF_DARWIN_HOST_OS")
 
 AC_OUTPUT
 
diff --git a/glusterfs.spec.in b/glusterfs.spec.in
index 23ef8fae21f..4c9a3b4111a 100644
--- a/glusterfs.spec.in
+++ b/glusterfs.spec.in
@@ -48,11 +48,12 @@ Requires(postun): /sbin/service
 
 BuildRequires: bison flex
 BuildRequires: gcc make automake libtool
-BuildRequires: ncurses-devel readline-devel
+BuildRequires: ncurses-devel readline-devel openssl-devel
 BuildRequires: python-ctypes
 %if 0%{?suse_version}
 BuildRequires: python-devel
 %endif
+Requires: openssl
 
 Obsoletes:        %{name}-libs <= 2.0.0
 Obsoletes:        %{name}-common < %{version}-%{release}
@@ -139,6 +140,7 @@ Summary:          Clustered file-system server
 Group:            System Environment/Daemons
 Requires:         %{name} = %{version}-%{release}
 Requires:         %{name}-fuse = %{version}-%{release}
+Requires:         openssl
 
 %description server
 GlusterFS is a clustered file-system capable of scaling to several
diff --git a/libglusterfs/src/Makefile.am b/libglusterfs/src/Makefile.am
index c7f3d9ba70b..2dab8735c96 100644
--- a/libglusterfs/src/Makefile.am
+++ b/libglusterfs/src/Makefile.am
@@ -4,8 +4,7 @@ libglusterfs_la_CFLAGS = -fPIC  -Wall -g -shared -nostartfiles $(GF_CFLAGS) \
 libglusterfs_la_CPPFLAGS = -D_FILE_OFFSET_BITS=64 -D__USE_FILE_OFFSET64 \
 	-D_GNU_SOURCE -DXLATORDIR=\"$(libdir)/glusterfs/$(PACKAGE_VERSION)/xlator\" \
 	-D$(GF_HOST_OS) -I$(CONTRIBDIR)/rbtree \
-	-DSCHEDULERDIR=\"$(libdir)/glusterfs/$(PACKAGE_VERSION)/scheduler\" \
-	-I$(CONTRIBDIR)/md5
+	-DSCHEDULERDIR=\"$(libdir)/glusterfs/$(PACKAGE_VERSION)/scheduler\"
 
 libglusterfs_la_LIBADD = @LEXLIB@
 
@@ -17,7 +16,7 @@ libglusterfs_la_SOURCES = dict.c xlator.c logging.c \
 	hashfn.c defaults.c common-utils.c timer.c inode.c call-stub.c \
 	compat.c fd.c compat-errno.c event.c mem-pool.c gf-dirent.c syscall.c \
 	iobuf.c globals.c statedump.c stack.c checksum.c daemon.c \
-	$(CONTRIBDIR)/md5/md5.c $(CONTRIBDIR)/rbtree/rb.c rbthash.c latency.c \
+	$(CONTRIBDIR)/rbtree/rb.c rbthash.c latency.c \
 	graph.c $(CONTRIBDIR)/uuid/clear.c $(CONTRIBDIR)/uuid/copy.c \
 	$(CONTRIBDIR)/uuid/gen_uuid.c $(CONTRIBDIR)/uuid/pack.c \
 	$(CONTRIBDIR)/uuid/parse.c $(CONTRIBDIR)/uuid/unparse.c \
@@ -33,7 +32,7 @@ noinst_HEADERS = common-utils.h defaults.h dict.h glusterfs.h hashfn.h \
 	logging.h xlator.h stack.h timer.h list.h inode.h call-stub.h compat.h \
 	fd.h revision.h compat-errno.h event.h mem-pool.h byte-order.h \
 	gf-dirent.h locking.h syscall.h iobuf.h globals.h statedump.h \
-	checksum.h daemon.h $(CONTRIBDIR)/md5/md5.h $(CONTRIBDIR)/rbtree/rb.h \
+	checksum.h daemon.h $(CONTRIBDIR)/rbtree/rb.h \
 	rbthash.h iatt.h latency.h mem-types.h $(CONTRIBDIR)/uuid/uuidd.h \
 	$(CONTRIBDIR)/uuid/uuid.h $(CONTRIBDIR)/uuid/uuidP.h \
 	$(CONTRIB_BUILDDIR)/uuid/uuid_types.h syncop.h graph-utils.h trie.h run.h \
diff --git a/libglusterfs/src/call-stub.c b/libglusterfs/src/call-stub.c
index 01e919d6943..308a9ad1fc1 100644
--- a/libglusterfs/src/call-stub.c
+++ b/libglusterfs/src/call-stub.c
@@ -22,9 +22,9 @@
 #include "config.h"
 #endif
 
+#include <openssl/md5.h>
 #include <inttypes.h>
 
-#include "md5.h"
 #include "call-stub.h"
 #include "mem-types.h"
 
@@ -2124,7 +2124,7 @@ fop_rchecksum_cbk_stub (call_frame_t *frame,
                         weak_checksum;
 
                 stub->args.rchecksum_cbk.strong_checksum =
-                        memdup (strong_checksum, MD5_DIGEST_LEN);
+                        memdup (strong_checksum, MD5_DIGEST_LENGTH);
         }
         if (xdata)
                 stub->xdata = dict_ref (xdata);
diff --git a/libglusterfs/src/checksum.c b/libglusterfs/src/checksum.c
index cea782293bd..7575b2f15b1 100644
--- a/libglusterfs/src/checksum.c
+++ b/libglusterfs/src/checksum.c
@@ -17,12 +17,10 @@
   <http://www.gnu.org/licenses/>.
 */
 
-#include <inttypes.h>
+#include <openssl/md5.h>
+#include <stdint.h>
 
 #include "glusterfs.h"
-#include "md5.h"
-#include "checksum.h"
-
 
 /*
  * The "weak" checksum required for the rsync algorithm,
@@ -31,22 +29,26 @@
  *
  * "a simple 32 bit checksum that can be upadted from either end
  *  (inspired by Mark Adler's Adler-32 checksum)"
+ *
+ * Note: these functions are only called to compute checksums on
+ * pathnames; they don't need to handle arbitrarily long strings of
+ * data. Thus int32_t and uint32_t are sufficient
  */
 
 uint32_t
-gf_rsync_weak_checksum (char *buf1, int32_t len)
+gf_rsync_weak_checksum (unsigned char *buf, size_t len)
 {
-        int32_t i;
+        int32_t i = 0;
         uint32_t s1, s2;
 
-        signed char *buf = (signed char *) buf1;
         uint32_t csum;
 
         s1 = s2 = 0;
-        for (i = 0; i < (len-4); i+=4) {
-                s2 += 4*(s1 + buf[i]) + 3*buf[i+1] + 2*buf[i+2] + buf[i+3];
-
-                s1 += buf[i+0] + buf[i+1] + buf[i+2] + buf[i+3];
+        if (len >= 4) {
+                for (; i < (len-4); i+=4) {
+                        s2 += 4*(s1 + buf[i]) + 3*buf[i+1] + 2*buf[i+2] + buf[i+3];
+                        s1 += buf[i+0] + buf[i+1] + buf[i+2] + buf[i+3];
+                }
         }
 
         for (; i < len; i++) {
@@ -66,13 +68,7 @@ gf_rsync_weak_checksum (char *buf1, int32_t len)
  */
 
 void
-gf_rsync_strong_checksum (char *buf, int32_t len, uint8_t *sum)
+gf_rsync_strong_checksum (unsigned char *data, size_t len, unsigned char *md5)
 {
-        md_context m;
-
-        md5_begin (&m);
-        md5_update (&m, (unsigned char *) buf, len);
-        md5_result (&m, (unsigned char *) sum);
-
-        return;
+        MD5(data, len, md5);
 }
diff --git a/libglusterfs/src/checksum.h b/libglusterfs/src/checksum.h
index 3542036bffc..19221b92235 100644
--- a/libglusterfs/src/checksum.h
+++ b/libglusterfs/src/checksum.h
@@ -20,8 +20,10 @@
 #ifndef __CHECKSUM_H__
 #define __CHECKSUM_H__
 
-uint32_t gf_rsync_weak_checksum (char *buf, int32_t len);
+uint32_t
+gf_rsync_weak_checksum (unsigned char *buf, size_t len);
 
-void gf_rsync_strong_checksum (char *buf, int32_t len, uint8_t *sum);
+void
+gf_rsync_strong_checksum (unsigned char *buf, size_t len, unsigned char *sum);
 
 #endif /* __CHECKSUM_H__ */
diff --git a/libglusterfs/src/common-utils.c b/libglusterfs/src/common-utils.c
index f26d2bdc318..c5080246a2f 100644
--- a/libglusterfs/src/common-utils.c
+++ b/libglusterfs/src/common-utils.c
@@ -52,7 +52,6 @@
 #include "glusterfs.h"
 #include "stack.h"
 #include "globals.h"
-#include "md5.h"
 #include "lkowner.h"
 
 #ifndef AI_ADDRCONFIG
@@ -1786,19 +1785,6 @@ lkowner_utoa_r (gf_lkowner_t *lkowner, char *dst, int len)
         return dst;
 }
 
-void _get_md5_str (char *out_str, size_t outlen,
-                   const uint8_t *input, int n)
-{
-        uint8_t out[MD5_DIGEST_LEN] = {0};
-        int     j = 0;
-
-        GF_ASSERT (outlen >= (2*MD5_DIGEST_LEN + 1));
-        get_md5 (out, input, n);
-        for (j = 0; j < MD5_DIGEST_LEN; j++)
-                snprintf(out_str + j * 2, outlen-j*2, "%02x", out[j]);
-
-}
-
 void* gf_array_elem (void *a, int index, size_t elem_size)
 {
         uint8_t* ptr = a;
diff --git a/libglusterfs/src/common-utils.h b/libglusterfs/src/common-utils.h
index 3aa0143d2ed..9d98975e14f 100644
--- a/libglusterfs/src/common-utils.h
+++ b/libglusterfs/src/common-utils.h
@@ -482,8 +482,6 @@ char *uuid_utoa_r (uuid_t uuid, char *dst);
 char *lkowner_utoa (gf_lkowner_t *lkowner);
 char *lkowner_utoa_r (gf_lkowner_t *lkowner, char *dst, int len);
 
-void _get_md5_str (char *out_str, size_t outlen,
-                   const uint8_t *input, int n);
 void gf_array_insertionsort (void *a, int l, int r, size_t elem_size,
                              gf_cmp cmp);
 int gf_is_str_int (const char *value);
diff --git a/xlators/cluster/afr/src/Makefile.am b/xlators/cluster/afr/src/Makefile.am
index ed090181316..95db5dd9645 100644
--- a/xlators/cluster/afr/src/Makefile.am
+++ b/xlators/cluster/afr/src/Makefile.am
@@ -1,7 +1,11 @@
 xlator_LTLIBRARIES = afr.la pump.la
 xlatordir = $(libdir)/glusterfs/$(PACKAGE_VERSION)/xlator/cluster
 
-afr_common_source = afr-dir-read.c afr-dir-write.c afr-inode-read.c afr-inode-write.c afr-open.c afr-transaction.c afr-self-heal-data.c afr-self-heal-common.c afr-self-heal-metadata.c afr-self-heal-entry.c afr-self-heal-algorithm.c afr-lk-common.c afr-self-heald.c $(top_builddir)/xlators/lib/src/libxlator.c
+afr_common_source = afr-dir-read.c afr-dir-write.c afr-inode-read.c \
+	afr-inode-write.c afr-open.c afr-transaction.c afr-self-heal-data.c \
+	afr-self-heal-common.c afr-self-heal-metadata.c afr-self-heal-entry.c \
+	afr-self-heal-algorithm.c afr-lk-common.c afr-self-heald.c \
+	$(top_builddir)/xlators/lib/src/libxlator.c
 
 afr_la_LDFLAGS = -module -avoidversion
 afr_la_SOURCES = $(afr_common_source) afr.c
@@ -11,11 +15,15 @@ pump_la_LDFLAGS = -module -avoidversion
 pump_la_SOURCES =  $(afr_common_source) pump.c
 pump_la_LIBADD = $(top_builddir)/libglusterfs/src/libglusterfs.la
 
-noinst_HEADERS = afr.h afr-transaction.h afr-inode-write.h afr-inode-read.h afr-dir-read.h afr-dir-write.h afr-self-heal.h afr-self-heal-common.h afr-self-heal-algorithm.h pump.h afr-mem-types.h afr-common.c afr-self-heald.h $(top_builddir)/xlators/lib/src/libxlator.h $(top_builddir)/glusterfsd/src/glusterfsd.h
+noinst_HEADERS = afr.h afr-transaction.h afr-inode-write.h afr-inode-read.h \
+	afr-dir-read.h afr-dir-write.h afr-self-heal.h afr-self-heal-common.h \
+	afr-self-heal-algorithm.h pump.h afr-mem-types.h afr-common.c \
+	afr-self-heald.h $(top_builddir)/xlators/lib/src/libxlator.h \
+	$(top_builddir)/glusterfsd/src/glusterfsd.h
 
 AM_CFLAGS = -fPIC -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -Wall -D$(GF_HOST_OS) \
-	    -I$(top_srcdir)/libglusterfs/src -I$(top_srcdir)/contrib/md5 -shared -nostartfiles $(GF_CFLAGS) \
-	    -I$(top_srcdir)/xlators/lib/src -I$(top_srcdir)/rpc/rpc-lib/src
+	-I$(top_srcdir)/libglusterfs/src -I$(top_srcdir)/xlators/lib/src \
+	-I$(top_srcdir)/rpc/rpc-lib/src -shared -nostartfiles $(GF_CFLAGS)
 
 CLEANFILES =
 
diff --git a/xlators/cluster/afr/src/afr-self-heal-algorithm.c b/xlators/cluster/afr/src/afr-self-heal-algorithm.c
index bf787339b1a..6bd0adcd851 100644
--- a/xlators/cluster/afr/src/afr-self-heal-algorithm.c
+++ b/xlators/cluster/afr/src/afr-self-heal-algorithm.c
@@ -18,6 +18,7 @@
 */
 
 
+#include <openssl/md5.h>
 #include "glusterfs.h"
 #include "afr.h"
 #include "xlator.h"
@@ -33,7 +34,6 @@
 #include "compat-errno.h"
 #include "compat.h"
 #include "byte-order.h"
-#include "md5.h"
 
 #include "afr-transaction.h"
 #include "afr-self-heal.h"
@@ -239,7 +239,7 @@ sh_loop_frame_create (call_frame_t *sh_frame, xlator_t *this,
                                                gf_afr_mt_char);
         if (!new_loop_sh->write_needed)
                 goto out;
-        new_loop_sh->checksum = GF_CALLOC (priv->child_count, MD5_DIGEST_LEN,
+        new_loop_sh->checksum = GF_CALLOC (priv->child_count, MD5_DIGEST_LENGTH,
                                            gf_afr_mt_uint8_t);
         if (!new_loop_sh->checksum)
                 goto out;
@@ -590,8 +590,8 @@ sh_diff_checksum_cbk (call_frame_t *loop_frame, void *cookie, xlator_t *this,
                         strerror (op_errno));
                 sh->op_failed = 1;
         } else {
-                memcpy (loop_sh->checksum + child_index * MD5_DIGEST_LEN,
-                        strong_checksum, MD5_DIGEST_LEN);
+                memcpy (loop_sh->checksum + child_index * MD5_DIGEST_LENGTH,
+                        strong_checksum, MD5_DIGEST_LENGTH);
         }
 
         call_count = afr_frame_return (loop_frame);
@@ -601,9 +601,9 @@ sh_diff_checksum_cbk (call_frame_t *loop_frame, void *cookie, xlator_t *this,
                         if (sh->sources[i] || !sh_local->child_up[i])
                                 continue;
 
-                        if (memcmp (loop_sh->checksum + (i * MD5_DIGEST_LEN),
-                                    loop_sh->checksum + (sh->source * MD5_DIGEST_LEN),
-                                    MD5_DIGEST_LEN)) {
+                        if (memcmp (loop_sh->checksum + (i * MD5_DIGEST_LENGTH),
+                                    loop_sh->checksum + (sh->source * MD5_DIGEST_LENGTH),
+                                    MD5_DIGEST_LENGTH)) {
                                 /*
                                   Checksums differ, so this block
                                   must be written to this sink
diff --git a/xlators/mgmt/glusterd/src/Makefile.am b/xlators/mgmt/glusterd/src/Makefile.am
index 8a9248daa25..d11dd2af292 100644
--- a/xlators/mgmt/glusterd/src/Makefile.am
+++ b/xlators/mgmt/glusterd/src/Makefile.am
@@ -1,10 +1,11 @@
 xlator_LTLIBRARIES = glusterd.la
 xlatordir = $(libdir)/glusterfs/$(PACKAGE_VERSION)/xlator/mgmt
 glusterd_la_CPPFLAGS = "-DFILTERDIR=\"$(libdir)/glusterfs/$(PACKAGE_VERSION)/filter\""
-glusterd_la_LDFLAGS = -module -avoidversion $(LIBXML2_LIBS)
-glusterd_la_SOURCES = glusterd.c glusterd-handler.c glusterd-sm.c glusterd-op-sm.c \
-	glusterd-utils.c glusterd-rpc-ops.c glusterd-store.c glusterd-handshake.c \
-	glusterd-pmap.c glusterd-volgen.c glusterd-rebalance.c glusterd-quota.c \
+glusterd_la_LDFLAGS = -module -avoidversion $(LIBXML2_LIBS) -lcrypto
+glusterd_la_SOURCES = glusterd.c glusterd-handler.c glusterd-sm.c \
+	glusterd-op-sm.c glusterd-utils.c glusterd-rpc-ops.c \
+	glusterd-store.c glusterd-handshake.c glusterd-pmap.c \
+	glusterd-volgen.c glusterd-rebalance.c glusterd-quota.c \
 	glusterd-geo-rep.c glusterd-replace-brick.c glusterd-log-ops.c \
 	glusterd-volume-ops.c glusterd-brick-ops.c glusterd-mountbroker.c \
 	glusterd-syncop.c
@@ -13,15 +14,18 @@ glusterd_la_LIBADD = $(top_builddir)/libglusterfs/src/libglusterfs.la \
 		     $(top_builddir)/rpc/xdr/src/libgfxdr.la \
 		     $(top_builddir)/rpc/rpc-lib/src/libgfrpc.la
 
-noinst_HEADERS = glusterd.h glusterd-utils.h glusterd-op-sm.h glusterd-sm.h \
-	glusterd-store.h glusterd-mem-types.h glusterd-pmap.h glusterd-volgen.h \
-        glusterd-mountbroker.h glusterd-syncop.h
+noinst_HEADERS = glusterd.h glusterd-utils.h glusterd-op-sm.h \
+	glusterd-sm.h glusterd-store.h glusterd-mem-types.h \
+	glusterd-pmap.h glusterd-volgen.h glusterd-mountbroker.h \
+	glusterd-syncop.h
 
 AM_CFLAGS = -fPIC -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -Wall -D$(GF_HOST_OS)\
 	-I$(top_srcdir)/libglusterfs/src -shared -nostartfiles $(GF_CFLAGS)\
-	-I$(rpclibdir) -L$(xlatordir)/ -I$(CONTRIBDIR)/rbtree -I$(top_srcdir)/rpc/xdr/src\
-	-I$(top_srcdir)/rpc/rpc-lib/src -I$(CONTRIBDIR)/uuid -I$(top_srcdir)/contrib/md5  -DSBIN_DIR=\"$(sbindir)\"\
-        -DDATADIR=\"$(localstatedir)\" -DGSYNCD_PREFIX=\"$(libexecdir)/glusterfs\"\
+	-I$(rpclibdir) -L$(xlatordir)/ -I$(CONTRIBDIR)/rbtree \
+	-I$(top_srcdir)/rpc/xdr/src -I$(top_srcdir)/rpc/rpc-lib/src \
+	-I$(CONTRIBDIR)/uuid \
+	-DSBIN_DIR=\"$(sbindir)\" -DDATADIR=\"$(localstatedir)\" \
+	-DGSYNCD_PREFIX=\"$(libexecdir)/glusterfs\"\
         -DSYNCDAEMON_COMPILE=$(SYNCDAEMON_COMPILE) $(LIBXML2_CFLAGS)
 
 
diff --git a/xlators/mgmt/glusterd/src/glusterd-utils.c b/xlators/mgmt/glusterd/src/glusterd-utils.c
index 37899d4be46..38e9a987dcf 100644
--- a/xlators/mgmt/glusterd/src/glusterd-utils.c
+++ b/xlators/mgmt/glusterd/src/glusterd-utils.c
@@ -21,6 +21,7 @@
 #define _CONFIG_H
 #include "config.h"
 #endif
+#include <openssl/md5.h>
 #include <inttypes.h>
 
 #include "globals.h"
@@ -32,7 +33,6 @@
 #include "timer.h"
 #include "defaults.h"
 #include "compat.h"
-#include "md5.h"
 #include "run.h"
 #include "compat-errno.h"
 #include "statedump.h"
@@ -81,6 +81,17 @@
 char    *glusterd_sock_dir = "/tmp";
 static glusterd_lock_t lock;
 
+static void
+md5_wrapper(const unsigned char *data, size_t len, char *md5)
+{
+        unsigned short i = 0;
+        unsigned short lim = MD5_DIGEST_LENGTH*2+1;
+        unsigned char scratch[MD5_DIGEST_LENGTH] = {0,};
+        MD5(data, len, scratch);
+        for (; i < MD5_DIGEST_LENGTH; i++)
+                snprintf(md5 + i * 2, lim-i*2, "%02x", scratch[i]); 
+}
+
 int32_t
 glusterd_get_lock_owner (uuid_t *uuid)
 {
@@ -1036,14 +1047,14 @@ glusterd_set_brick_socket_filepath (glusterd_volinfo_t *volinfo,
 {
         char                    export_path[PATH_MAX] = {0,};
         char                    sock_filepath[PATH_MAX] = {0,};
-        char                    md5_sum[MD5_DIGEST_LEN*2+1] = {0,};
+        char                    md5_sum[MD5_DIGEST_LENGTH*2+1] = {0,};
         char                    volume_dir[PATH_MAX] = {0,};
         xlator_t                *this = NULL;
         glusterd_conf_t         *priv = NULL;
         int                     expected_file_len = 0;
 
         expected_file_len = strlen (glusterd_sock_dir) + strlen ("/") +
-                            MD5_DIGEST_LEN*2 + strlen (".socket") + 1;
+                            MD5_DIGEST_LENGTH*2 + strlen (".socket") + 1;
         GF_ASSERT (len >= expected_file_len);
         this = THIS;
         GF_ASSERT (this);
@@ -1054,9 +1065,7 @@ glusterd_set_brick_socket_filepath (glusterd_volinfo_t *volinfo,
         GLUSTERD_REMOVE_SLASH_FROM_PATH (brickinfo->path, export_path);
         snprintf (sock_filepath, PATH_MAX, "%s/run/%s-%s",
                   volume_dir, brickinfo->hostname, export_path);
-        _get_md5_str (md5_sum, sizeof (md5_sum),
-                              (uint8_t*)sock_filepath, strlen (sock_filepath));
-
+        md5_wrapper ((unsigned char *) sock_filepath, strlen(sock_filepath), md5_sum);
         snprintf (sockpath, len, "%s/%s.socket", glusterd_sock_dir, md5_sum);
 }
 
@@ -2678,12 +2687,11 @@ glusterd_nodesvc_set_socket_filepath (char *rundir, uuid_t uuid,
                                       char *socketpath, int len)
 {
         char                    sockfilepath[PATH_MAX] = {0,};
-        char                    md5_str[PATH_MAX] = {0,};
+        char                    md5_str[MD5_DIGEST_LENGTH*2+1] = {0,};
 
         snprintf (sockfilepath, sizeof (sockfilepath), "%s/run-%s",
                   rundir, uuid_utoa (uuid));
-        _get_md5_str (md5_str, sizeof (md5_str),
-                      (uint8_t *)sockfilepath, sizeof (sockfilepath));
+        md5_wrapper ((unsigned char *) sockfilepath, strlen (sockfilepath), md5_str);
         snprintf (socketpath, len, "%s/%s.socket", glusterd_sock_dir,
                   md5_str);
         return 0;
diff --git a/xlators/nfs/server/src/Makefile.am b/xlators/nfs/server/src/Makefile.am
index a2c76a5021d..b5fd8586dbd 100644
--- a/xlators/nfs/server/src/Makefile.am
+++ b/xlators/nfs/server/src/Makefile.am
@@ -2,16 +2,18 @@ xlator_LTLIBRARIES = server.la
 xlatordir = $(libdir)/glusterfs/$(PACKAGE_VERSION)/xlator/nfs
 nfsrpclibdir = $(top_srcdir)/rpc/rpc-lib/src
 server_la_LDFLAGS = -module -avoidversion
-server_la_SOURCES = nfs.c nfs-common.c nfs-fops.c nfs-inodes.c nfs-generics.c mount3.c nfs3-fh.c nfs3.c nfs3-helpers.c nlm4.c nlmcbk_svc.c
+server_la_SOURCES = nfs.c nfs-common.c nfs-fops.c nfs-inodes.c \
+	nfs-generics.c mount3.c nfs3-fh.c nfs3.c nfs3-helpers.c nlm4.c \
+	nlmcbk_svc.c
 server_la_LIBADD = $(top_builddir)/libglusterfs/src/libglusterfs.la
 
-noinst_HEADERS = nfs.h nfs-common.h nfs-fops.h nfs-inodes.h nfs-generics.h mount3.h nfs3-fh.h nfs3.h nfs3-helpers.h nfs-mem-types.h nlm4.h
+noinst_HEADERS = nfs.h nfs-common.h nfs-fops.h nfs-inodes.h nfs-generics.h \
+	mount3.h nfs3-fh.h nfs3.h nfs3-helpers.h nfs-mem-types.h nlm4.h
 
 AM_CFLAGS = -fPIC -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -Wall -D$(GF_HOST_OS)\
 	-DLIBDIR=\"$(libdir)/glusterfs/$(PACKAGE_VERSION)/auth\" \
 	-I$(top_srcdir)/libglusterfs/src -shared -nostartfiles $(GF_CFLAGS)\
 	-I$(nfsrpclibdir) -L$(xlatordir)/ -I$(CONTRIBDIR)/rbtree\
-	-I$(top_srcdir)/rpc/xdr/src/ \
-	-I$(top_srcdir)/contrib/md5/
+	-I$(top_srcdir)/rpc/xdr/src/
 
 CLEANFILES =
diff --git a/xlators/protocol/legacy/server/src/Makefile.am b/xlators/protocol/legacy/server/src/Makefile.am
index 262fec9ea07..bfc0b7eb6b1 100644
--- a/xlators/protocol/legacy/server/src/Makefile.am
+++ b/xlators/protocol/legacy/server/src/Makefile.am
@@ -15,7 +15,6 @@ noinst_HEADERS = server-protocol.h server-helpers.h server-mem-types.h \
 
 AM_CFLAGS = -fPIC -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -Wall -D$(GF_HOST_OS) \
 	-I$(top_srcdir)/libglusterfs/src -shared -nostartfiles \
-	-I$(top_srcdir)/contrib/md5/ \
 	-DDATADIR=\"$(localstatedir)\" -DCONFDIR=\"$(sysconfdir)/glusterfs\" \
 	-DLIBDIR=\"$(libdir)/glusterfs/$(PACKAGE_VERSION)/auth\" \
 	$(GF_CFLAGS) -I$(top_srcdir)/xlators/protocol/legacy/lib/src \
diff --git a/xlators/protocol/server/src/Makefile.am b/xlators/protocol/server/src/Makefile.am
index 72a581ddf10..0df5894eceb 100644
--- a/xlators/protocol/server/src/Makefile.am
+++ b/xlators/protocol/server/src/Makefile.am
@@ -18,7 +18,6 @@ AM_CFLAGS = -fPIC -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -Wall    \
 	-DLIBDIR=\"$(libdir)/glusterfs/$(PACKAGE_VERSION)/auth\" \
 	$(GF_CFLAGS) -I$(top_srcdir)/xlators/protocol/lib/src   \
 	-I$(top_srcdir)/rpc/rpc-lib/src/       \
-	-I$(top_srcdir)/rpc/xdr/src/       \
-	-I$(top_srcdir)/contrib/md5/
+	-I$(top_srcdir)/rpc/xdr/src/
 
 CLEANFILES = *~
diff --git a/xlators/protocol/server/src/server3_1-fops.c b/xlators/protocol/server/src/server3_1-fops.c
index 1c40a12cfd5..6ce0b27afc4 100644
--- a/xlators/protocol/server/src/server3_1-fops.c
+++ b/xlators/protocol/server/src/server3_1-fops.c
@@ -23,13 +23,14 @@
 #include "config.h"
 #endif
 
+#include <openssl/md5.h>
+
 #include "server.h"
 #include "server-helpers.h"
 #include "glusterfs3-xdr.h"
 #include "glusterfs3.h"
 #include "compat-errno.h"
 
-#include "md5.h"
 #include "xdr-nfs3.h"
 
 
@@ -1471,7 +1472,7 @@ server_rchecksum_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                 rsp.weak_checksum = weak_checksum;
 
                 rsp.strong_checksum.strong_checksum_val = (char *)strong_checksum;
-                rsp.strong_checksum.strong_checksum_len = MD5_DIGEST_LEN;
+                rsp.strong_checksum.strong_checksum_len = MD5_DIGEST_LENGTH;
         }
         if (op_ret == -1)
                 gf_log (this->name, GF_LOG_INFO,
diff --git a/xlators/storage/posix/src/Makefile.am b/xlators/storage/posix/src/Makefile.am
index d1d420017e7..408dcb80ddf 100644
--- a/xlators/storage/posix/src/Makefile.am
+++ b/xlators/storage/posix/src/Makefile.am
@@ -11,7 +11,7 @@ noinst_HEADERS = posix.h posix-mem-types.h posix-handle.h
 
 AM_CFLAGS = -fPIC -fno-strict-aliasing -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE \
             -D$(GF_HOST_OS) -Wall -I$(top_srcdir)/libglusterfs/src -shared \
-            -nostartfiles -I$(top_srcdir)/contrib/md5 -I$(top_srcdir)/rpc/xdr/src \
+            -nostartfiles -I$(top_srcdir)/rpc/xdr/src \
             -I$(top_srcdir)/rpc/rpc-lib/src $(GF_CFLAGS)
 
 CLEANFILES =
diff --git a/xlators/storage/posix/src/posix-helpers.c b/xlators/storage/posix/src/posix-helpers.c
index 20a9528b09f..04c166c54f7 100644
--- a/xlators/storage/posix/src/posix-helpers.c
+++ b/xlators/storage/posix/src/posix-helpers.c
@@ -38,7 +38,6 @@
 #endif /* GF_BSD_HOST_OS */
 
 #include "glusterfs.h"
-#include "md5.h"
 #include "checksum.h"
 #include "dict.h"
 #include "logging.h"
diff --git a/xlators/storage/posix/src/posix.c b/xlators/storage/posix/src/posix.c
index bf38bd6cebf..2452ddc4d88 100644
--- a/xlators/storage/posix/src/posix.c
+++ b/xlators/storage/posix/src/posix.c
@@ -24,6 +24,7 @@
 
 #define __XOPEN_SOURCE 500
 
+#include <openssl/md5.h>
 #include <stdint.h>
 #include <sys/time.h>
 #include <sys/resource.h>
@@ -42,7 +43,6 @@
 #endif /* HAVE_LINKAT */
 
 #include "glusterfs.h"
-#include "md5.h"
 #include "checksum.h"
 #include "dict.h"
 #include "logging.h"
@@ -3739,13 +3739,13 @@ posix_rchecksum (call_frame_t *frame, xlator_t *this,
         int ret = 0;
 
         int32_t weak_checksum = 0;
-        uint8_t strong_checksum[MD5_DIGEST_LEN];
+        unsigned char strong_checksum[MD5_DIGEST_LENGTH];
 
         VALIDATE_OR_GOTO (frame, out);
         VALIDATE_OR_GOTO (this, out);
         VALIDATE_OR_GOTO (fd, out);
 
-        memset (strong_checksum, 0, MD5_DIGEST_LEN);
+        memset (strong_checksum, 0, MD5_DIGEST_LENGTH);
         buf = GF_CALLOC (1, len, gf_posix_mt_char);
 
         if (!buf) {
@@ -3773,8 +3773,8 @@ posix_rchecksum (call_frame_t *frame, xlator_t *this,
                 goto out;
         }
 
-        weak_checksum = gf_rsync_weak_checksum (buf, len);
-        gf_rsync_strong_checksum (buf, len, strong_checksum);
+        weak_checksum = gf_rsync_weak_checksum ((unsigned char *) buf, (size_t) len);
+        gf_rsync_strong_checksum ((unsigned char *) buf, (size_t) len, (unsigned char *) strong_checksum);
 
         GF_FREE (buf);