libshared: move md5 to BPrivate namespace

Otherwise it clashes with the implementation in OpenSSL which uses the
same names but now has a different ABI.

Change-Id: I5cb3ff97d7b28de978cdcbd8a06f25f65fb53784
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2854
Reviewed-by: Kyle Ambroff-Kao <kyle@ambroffkao.com>
Reviewed-by: Jérôme Duval <jerome.duval@gmail.com>

headers/private/shared/md5.h

@@ -25,9 +25,7 @@
 #ifndef _MD5_H
 #define _MD5_H
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+namespace BPrivate {
 
 /* Any 32-bit or wider unsigned integer data type will do */
 typedef unsigned int MD5_u32plus;
@@ -43,8 +41,8 @@ extern void MD5_Init(MD5_CTX *ctx);
 extern void MD5_Update(MD5_CTX *ctx, const void *data, unsigned long size);
 extern void MD5_Final(unsigned char *result, MD5_CTX *ctx);
 
-#ifdef __cplusplus
 };
-#endif
+
+using namespace BPrivate;
 
 #endif

src/kits/network/libnetapi/HttpAuthentication.cpp

@@ -21,13 +21,13 @@
 #define PRINT(x)
 #endif
 
-extern "C" {
 #ifdef OPENSSL_ENABLED
+extern "C" {
 #include <openssl/md5.h>
+};
 #else
 #include "md5.h"
 #endif
-};
 
 #ifndef MD5_DIGEST_LENGTH
 #define MD5_DIGEST_LENGTH 16

src/kits/shared/Jamfile

@@ -50,7 +50,7 @@ for architectureObject in [ MultiArchSubDirSetup ] {
 			Json.cpp
 			Keymap.cpp
 			LongAndDragTrackingFilter.cpp
-			md5.c
+			md5.cpp
 			MessageBuilder.cpp
 			NaturalCompare.cpp
 			PromptWindow.cpp

src/kits/shared/md5.cpp

@@ -85,6 +85,9 @@
 	(ctx->block[(n)])
 #endif
 
+
+namespace BPrivate {
+
 /*
  * This processes one or more 64-byte data blocks, but does NOT update
  * the bit counters.  There are no alignment requirements.
@@ -95,7 +98,7 @@ static const void *body(MD5_CTX *ctx, const void *data, unsigned long size)
 	MD5_u32plus a, b, c, d;
 	MD5_u32plus saved_a, saved_b, saved_c, saved_d;
 
-	ptr = data;
+	ptr = (const unsigned char*)data;
 
 	a = ctx->a;
 	b = ctx->b;
@@ -291,3 +294,5 @@ void MD5_Final(unsigned char *result, MD5_CTX *ctx)
 
 	memset(ctx, 0, sizeof(*ctx));
 }
+
+};