Bug#35764496: Running too much data through MD5() causes

 server stop

The parameter type to the helper functions was int and was truncating
the value passed.
Fixed by making sure the length parameter is consistent.

Change-Id: Ifd92be58982cf89548243a6351565596e385f0e5

Author: gkodinov

include/my_md5.h

@@ -33,7 +33,7 @@
 extern "C" {
 #endif
 
-void compute_md5_hash(char *digest, const char *buf, int len);
+void compute_md5_hash(char *digest, const char *buf, size_t len);
 
 /*
   Convert an array of bytes to a hexadecimal representation.

mysys_ssl/my_md5.cc

@@ -39,7 +39,7 @@
 #if defined(HAVE_OPENSSL)
 #include <openssl/md5.h>
 
-static void my_md5_hash(unsigned char* digest, unsigned const char *buf, int len)
+static void my_md5_hash(unsigned char* digest, unsigned const char *buf, size_t len)
 {
   MD5_CTX ctx;
   MD5_Init (&ctx);
@@ -58,7 +58,7 @@ static void my_md5_hash(unsigned char* digest, unsigned const char *buf, int len
 
     @return              void
 */
-void compute_md5_hash(char *digest, const char *buf, int len)
+void compute_md5_hash(char *digest, const char *buf, size_t len)
 {
 #if defined(HAVE_OPENSSL)
   my_md5_hash((unsigned char*)digest, (unsigned const char*)buf, len);