OvmfPkg: Add C runtime apis referenced by Boringssl

CryptoPkg/Library/BaseCryptLib/BaseCryptLib.inf

@@ -65,6 +65,7 @@
   SysCall/CrtWrapper.c
   SysCall/TimerWrapper.c
   SysCall/BaseMemAllocation.c
+  SysCall/CrtUtils.c
 
 [Sources.Ia32]
   Rand/CryptRandTsc.c
@@ -99,6 +100,7 @@
   PrintLib
   UefiBootServicesTableLib
   SynchronizationLib
+  SafeIntLib
 
 [Protocols]
   gEfiMpServiceProtocolGuid

CryptoPkg/Library/BaseCryptLib/PeiCryptLib.inf

@@ -71,6 +71,7 @@
   SysCall/CrtWrapper.c
   SysCall/ConstantTimeClock.c
   SysCall/BaseMemAllocation.c
+  SysCall/CrtUtils.c
 
 [Packages]
   MdePkg/MdePkg.dec
@@ -87,6 +88,7 @@
   PeiServicesTablePointerLib
   PeiServicesLib
   SynchronizationLib
+  SafeIntLib
 
 [Ppis]
   gEfiPeiMpServicesPpiGuid

CryptoPkg/Library/BaseCryptLib/SecCryptLib.inf

@@ -60,6 +60,7 @@
   SysCall/CrtWrapper.c
   SysCall/ConstantTimeClock.c
   SysCall/BaseMemAllocation.c
+  SysCall/CrtUtils.c
 
 [Packages]
   MdePkg/MdePkg.dec
@@ -73,6 +74,7 @@
   OpensslLib
   IntrinsicLib
   PrintLib
+  SafeIntLib
 
 #
 # Remove these [BuildOptions] after this library is cleaned up

CryptoPkg/Library/BaseCryptLib/SmmCryptLib.inf

@@ -68,6 +68,7 @@
   SysCall/CrtWrapper.c
   SysCall/ConstantTimeClock.c
   SysCall/BaseMemAllocation.c
+  SysCall/CrtUtils.c
 
 [Sources.Ia32]
   Rand/CryptRandTsc.c
@@ -94,6 +95,7 @@
   PrintLib
   MmServicesTableLib
   SynchronizationLib
+  SafeIntLib
 
 #
 # Remove these [BuildOptions] after this library is cleaned up

CryptoPkg/Library/BaseCryptLib/SysCall/CrtUtils.c

@@ -0,0 +1,92 @@
+/** @file
+  C Run-Time Libraries (CRT) Utility apis for BoringSSL-based
+  Cryptographic Library.
+
+Copyright (c) 2009 - 2017, Intel Corporation. All rights reserved.<BR>
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <CrtLibSupport.h>
+#include <Uefi/UefiBaseType.h>
+#include <Library/RngLib.h>
+#include <Library/SafeIntLib.h>
+
+/* Performs a binary search */
+void *
+bsearch (
+  const void *key,
+  const void *base,
+  size_t nmemb,
+  size_t size,
+  int         ( *compar )(const void *, const void *)
+  )
+{
+  void           *Mid;
+  int            Sign;
+  RETURN_STATUS  Status = RETURN_INVALID_PARAMETER;
+  size_t         Result;
+
+  if (!key || !base || !nmemb || !size) {
+    return NULL;
+  }
+
+  Status = SafeUintnMult ((UINTN)size, (UINTN)(nmemb/2), (UINTN *)&Result);
+
+  if ((Status == RETURN_BUFFER_TOO_SMALL) ||
+      (Status == RETURN_INVALID_PARAMETER))
+  {
+    return NULL;
+  }
+
+  while (nmemb > 0) {
+    Mid  = (char *)base + size * (nmemb/2);
+    Sign = compar (key, Mid);
+    if (Sign < 0) {
+      nmemb /= 2;
+    } else if (Sign > 0) {
+      base   = (char *)Mid + size;
+      nmemb -= nmemb/2 + 1;
+    } else {
+      return Mid;
+    }
+  }
+
+  return NULL;
+}
+
+/* Returns entropy of requested length in provided buffer */
+int
+getentropy (
+  void    *buffer,
+  size_t  length
+  )
+{
+  UINT8   *EntropyBuffer = (UINT8 *)buffer;
+  UINTN   Index;
+  UINT64  RandNum;
+  UINTN   CopyLength;
+
+  if (length > GETENTROPY_MAX) {
+    errno = EIO;
+    return -1;
+  }
+
+  if (EntropyBuffer == NULL) {
+    errno = EFAULT;
+    return -1;
+  }
+
+  for (Index = 0; Index < length; Index += sizeof (UINT64)) {
+    if (!GetRandomNumber64 (&RandNum)) {
+      errno = ENOSYS;
+      return -1;
+    }
+
+    CopyLength =
+      (length - Index >= sizeof (UINT64)) ? sizeof (UINT64) : (length - Index);
+    CopyMem (EntropyBuffer + Index, &RandNum, CopyLength);
+  }
+
+  return 0;
+}

CryptoPkg/Library/BaseCryptLib/SysCall/CrtWrapper.c

@@ -8,6 +8,9 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
 **/
 
 #include <CrtLibSupport.h>
+#include <Uefi/UefiBaseType.h>
+#include <Library/RngLib.h>
+#include <Library/SafeIntLib.h>
 
 int  errno = 0;
 
@@ -580,15 +583,99 @@ fopen (
 
 size_t
 fread (
-  void    *b,
-  size_t  c,
-  size_t  i,
-  FILE    *f
+  void    *ptr,
+  size_t  size,
+  size_t  nmemb,
+  FILE    *stream
   )
 {
   return 0;
 }
 
+int
+fputs (
+  const char  *s,
+  FILE        *stream
+  )
+{
+  return -1;
+}
+
+int
+fflush (
+  FILE  *stream
+  )
+{
+  return -1;
+}
+
+int
+ferror (
+  FILE  *stream
+  )
+{
+  return -1;
+}
+
+int
+fseek (
+  FILE  *stream,
+  long  offset,
+  int   whence
+  )
+{
+  return -1;
+}
+
+int
+feof (
+  FILE  *stream
+  )
+{
+  return -1;
+}
+
+int
+ftell (
+  FILE  *stream
+  )
+{
+  return -1;
+}
+
+char *
+fgets (
+  char  *s,
+  int   size,
+  FILE  *stream
+  )
+{
+  return NULL;
+}
+
+char *
+strdup (
+  char  *s
+  )
+{
+  UINTN  Length;
+  VOID   *Buffer;
+
+  if (!s) {
+    return NULL;
+  }
+
+  Length = strlen (s);
+
+  Buffer = malloc (Length);
+  if (Buffer == NULL) {
+    return NULL;
+  }
+
+  strncpy (Buffer, s, Length);
+  return Buffer;
+}
+
 uid_t
 getuid (
   void