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

2 files changed, 14 insertions, 0 deletions

diff --git a/CryptoPkg/Library/BaseCryptLib/SysCall/CrtWrapper.c b/CryptoPkg/Library/BaseCryptLib/SysCall/CrtWrapper.c
index 20c96563d2..9510a4a383 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 --

 //

diff --git a/CryptoPkg/Library/Include/CrtLibSupport.h b/CryptoPkg/Library/Include/CrtLibSupport.h
index 7f1ec12302..feaf58b0c7 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