Re: [PATCH] CryptoPkg/CrtLibSupport: add secure_getenv() stub function

["Long, Qin" <qin.long@intel.com>]

It's OK for me to add this NULL wrapper. 

Reviewed-by: Long Qin <qin.long@intel.com>


Best Regards & Thanks,
LONG, Qin

-----Original Message-----
From: Laszlo Ersek [mailto:lersek@redhat.com] 
Sent: Tuesday, May 8, 2018 4:21 AM
To: edk2-devel-01 <edk2-devel@lists.01.org>
Cc: Long, Qin <qin.long@intel.com>; Ye, Ting <ting.ye@intel.com>
Subject: [PATCH] CryptoPkg/CrtLibSupport: add secure_getenv() stub function

The Fedora distro ships a modified OpenSSL 1.1.0 package stream. One of their patches calls the secure_getenv() C library function. We already have a stub for getenv(); it applies trivially to secure_getenv() as well.
Add the secure_getenv() stub so that edk2 can be built with Fedora's OpenSSL 1.1.0 sources.

Cc: Qin Long <qin.long@intel.com>
Cc: Ting Ye <ting.ye@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
---

Notes:
    Repo:   https://github.com/lersek/edk2.git
    Branch: secure_getenv

 CryptoPkg/Library/Include/CrtLibSupport.h           |  1 +
 CryptoPkg/Library/BaseCryptLib/SysCall/CrtWrapper.c | 13 +++++++++++++
 2 files changed, 14 insertions(+)

diff --git a/CryptoPkg/Library/Include/CrtLibSupport.h b/CryptoPkg/Library/Include/CrtLibSupport.h
index 7f1ec1230206..feaf58b0c79a 100644
--- a/CryptoPkg/Library/Include/CrtLibSupport.h
+++ b/CryptoPkg/Library/Include/CrtLibSupport.h
@@ -163,6 +163,7 @@ gid_t          getgid      (void);
 gid_t          getegid     (void);
 void           qsort       (void *, size_t, size_t, int (*)(const void *, const void *));
 char           *getenv     (const char *);
+char           *secure_getenv (const char *);
 #if defined(__GNUC__) && (__GNUC__ >= 2)
 void           abort       (void) __attribute__((__noreturn__));
 #else
diff --git a/CryptoPkg/Library/BaseCryptLib/SysCall/CrtWrapper.c b/CryptoPkg/Library/BaseCryptLib/SysCall/CrtWrapper.c
index 20c96563d270..9510a4a383e6 100644
--- a/CryptoPkg/Library/BaseCryptLib/SysCall/CrtWrapper.c
+++ b/CryptoPkg/Library/BaseCryptLib/SysCall/CrtWrapper.c
@@ -361,6 +361,19 @@ char *getenv (const char *varname)
   return NULL;
 }
 
+/* Get a value from the current environment */ char *secure_getenv 
+(const char *varname) {
+  //
+  // Null secure_getenv() function implementation to satisfy the 
+linker, since
+  // there is no direct functionality logic dependency in present UEFI cases.
+  //
+  // From the secure_getenv() manual: 'just like getenv() except that 
+it
+  // returns NULL in cases where "secure execution" is required'.
+  //
+  return NULL;
+}
+
 //
 // -- Stream I/O Routines --
 //
--
2.14.1.3.gb7cf6e02401b