MFC r282726:

Ensure libmd symbols do not clash with libcrypto

Add a prefix to all symbols in libmd to avoid incompatibilites
with same-named, but not binary compatible, symbols from libcrypto.

Also introduce Weak aliases to avoid the need to rebuild dependent
binaries and a major version bump.

PR:             199119
Differential Revision:  D2216
Reviewed by:    roberto, delphij
MFC after:      2 weeks

TAG:	IPSEC-HEAD
Issue:	#4841

1 files changed, 28 insertions, 0 deletions

diff --git a/lib/libmd/sha.h b/lib/libmd/sha.h
index 8a0b7c2..502f1ae 100644
--- a/lib/libmd/sha.h
+++ b/lib/libmd/sha.h
@@ -79,6 +79,33 @@ typedef struct SHAstate_st {
 #define	SHA1_CTX	SHA_CTX
 
 __BEGIN_DECLS
+
+/* Ensure libmd symbols do not clash with libcrypto */
+
+#define SHA_Init	_libmd_SHA_Init
+#define SHA_Update	_libmd_SHA_Update
+#define SHA_Final	_libmd_SHA_Final
+#define SHA_End		_libmd_SHA_End
+#define SHA_File	_libmd_SHA_File
+#define SHA_FileChunk	_libmd_SHA_FileChunk
+#define SHA_Data	_libmd_SHA_Data
+
+#define SHA_Transform	_libmd_SHA_Transform
+#define SHA_version	_libmd_SHA_version
+#define sha_block	_libmd_sha_block
+
+#define SHA1_Init	_libmd_SHA1_Init
+#define SHA1_Update	_libmd_SHA1_Update
+#define SHA1_Final	_libmd_SHA1_Final
+#define SHA1_End	_libmd_SHA1_End
+#define SHA1_File	_libmd_SHA1_File
+#define SHA1_FileChunk	_libmd_SHA1_FileChunk
+#define SHA1_Data	_libmd_SHA1_Data
+
+#define SHA1_Transform	_libmd_SHA1_Transform
+#define SHA1_version	_libmd_SHA1_version
+#define sha1_block	_libmd_sha1_block
+
 void	SHA_Init(SHA_CTX *c);
 void	SHA_Update(SHA_CTX *c, const void *data, size_t len);
 void	SHA_Final(unsigned char *md, SHA_CTX *c);
@@ -86,6 +113,7 @@ char   *SHA_End(SHA_CTX *, char *);
 char   *SHA_File(const char *, char *);
 char   *SHA_FileChunk(const char *, char *, off_t, off_t);
 char   *SHA_Data(const void *, unsigned int, char *);
+
 void	SHA1_Init(SHA_CTX *c);
 void	SHA1_Update(SHA_CTX *c, const void *data, size_t len);
 void	SHA1_Final(unsigned char *md, SHA_CTX *c);