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CloverBootloader/CloverPackage/utils/nvram/nvram2.c
Slice bf4fb452dc make the utility to be universal from 10.13 upto now 
Signed-off-by: Slice <sergey.slice@gmail.com>
2023-09-15 19:50:48 +03:00

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/*
* Copyright (c) 2000-2020 Apple Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
* The contents of this file constitute Original Code as defined in and
* are subject to the Apple Public Source License Version 1.1 (the
* "License"). You may not use this file except in compliance with the
* License. Please obtain a copy of the License at
* http://www.apple.com/publicsource and read it before using this file.
*
* This Original Code and all software distributed under the License are
* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
* License for the specific language governing rights and limitations
* under the License.
*
* @APPLE_LICENSE_HEADER_END@
*/
/*
clang nvram2.c -o nvram3 -framework CoreFoundation -framework IOKit -mmacosx-version-min=10.13
*/
// https://github.com/apple-oss-distributions/system_cmds/blob/13d383ddb305dc1672243e5384ba18b58949cc2c/nvram.tproj/nvram.c
//#include "assumes.h"
#include <stdio.h>
#include <IOKit/IOKitLib.h>
#include <IOKit/IOKitKeys.h>
//#include <IOKit/IOKitKeysPrivate.h>
#include <CoreFoundation/CoreFoundation.h>
#include <err.h>
#include <mach/mach_error.h>
#include <sys/stat.h>
#define TARGET_OS_BRIDGE 0
// properties found in the registry root
#define kIOConsoleUsersKey "IOConsoleUsers" /* value is OSArray */
#define kIOMaximumMappedIOByteCountKey "IOMaximumMappedIOByteCount" /* value is OSNumber */
// properties found in the console user dict
#define kIOConsoleSessionIDKey "kCGSSessionIDKey" /* value is OSNumber */
#define kIOConsoleSessionUserNameKey "kCGSSessionUserNameKey" /* value is OSString */
#define kIOConsoleSessionUIDKey "kCGSSessionUserIDKey" /* value is OSNumber */
#define kIOConsoleSessionConsoleSetKey "kCGSSessionConsoleSetKey" /* value is OSNumber */
#define kIOConsoleSessionOnConsoleKey "kCGSSessionOnConsoleKey" /* value is OSBoolean */
// IOResources property
#define kIOConsoleUsersSeedKey "IOConsoleUsersSeed" /* value is OSNumber */
#define kIOKernelHasSafeSleep 1
#define kIONVRAMForceSyncNowPropertyKey "IONVRAM-FORCESYNCNOW-PROPERTY"
#define gEfiGlobalVariableGuid "8BE4DF61-93CA-11D2-AA0D-00E098032B8C"
#define gAppleNvramGuid "4D1EDE05-38C7-4A6A-9CC6-4BCCA8B38C14"
#define gAppleSecureBootGuid "94B73556-2197-4702-82A8-3E1337DAFBFB"
#define gAppleBootGuid "7C436110-AB2A-4BBB-A880-FE41995C9F82"
#define gAppleNetworkGuid "36C28AB5-6566-4C50-9EBD-CBB920F83843"
// Prototypes
static void UsageMessage(const char *message);
static void ParseFile(const char *fileName);
static void ParseXMLFile(const char *fileName);
static void SetOrGetOFVariable(char *str);
static kern_return_t GetOFVariable(const char *name, CFStringRef *nameRef,
CFTypeRef *valueRef);
static kern_return_t SetOFVariable(const char *name, const char *value);
static void DeleteOFVariable(const char *name);
static void PrintOFVariables(void);
static void PrintOFLargestVariables(void);
static void PrintOFVariable(const void *key,const void *value,void *context);
static void SetOFVariableFromFile(const void *key, const void *value, void *context);
static int ClearOFVariables(void);
static void ClearOFVariable(const void *key,const void *value,void *context);
static CFTypeRef ConvertValueToCFTypeRef(CFTypeID typeID, const char *value);
static void NVRamSyncNow(void);
// Global Variables
static io_registry_entry_t gOptionsRef;
static io_registry_entry_t gSystemOptionsRef;
static io_registry_entry_t gSelectedOptionsRef;
static bool gUseXML;
static bool gPrintInHex;
static bool gUseForceSync;
#if TARGET_OS_BRIDGE /* Stuff for nvram bridge -> intel */
#include <dlfcn.h>
#include <libMacEFIManager/MacEFIHostInterfaceAPI.h>
static kern_return_t LinkMacNVRAMSymbols(void);
static kern_return_t GetMacOFVariable(char *name, char **value);
static kern_return_t SetMacOFVariable(char *name, char *value);
static kern_return_t DeleteMacOFVariable(char *name);
static bool gBridgeToIntel;
static void *gDL_handle;
static void *gNvramInterface;
static void (*hostInterfaceInitialize_fptr)(void);
static void *(*createNvramHostInterface_fptr)(const char *handle);
static kern_return_t (*destroyNvramHostInterface_fptr)(void *interface);
static kern_return_t (*getNVRAMVariable_fptr)(void *interface, char *name, char **buffer, uint32_t *size);
static kern_return_t (*setNVRAMVariable_fptr)(void *interface, char *name, char *buffer);
static kern_return_t (*deleteNVRAMVariable_fptr)(void *interface, char *name);
static void (*hostInterfaceDeinitialize_fptr)(void); /* may not need? */
#endif /* TARGET_OS_BRIDGE */
int main(int argc, char **argv)
{
long cnt;
char *str, errorMessage[256];
kern_return_t result;
mach_port_t mainPort;
int argcount = 0;
//#if defined(MAC_OS_VERSION_12_0)
// result = IOMainPort(bootstrap_port, &mainPort);
//#else
result = IOMasterPort(bootstrap_port, &mainPort);
//#endif
if (result != KERN_SUCCESS) {
errx(1, "Error getting the IOMainPort: %s",
mach_error_string(result));
}
gOptionsRef = IORegistryEntryFromPath(mainPort, "IODeviceTree:/options");
if (gOptionsRef == 0) {
errx(1, "nvram is not supported on this system");
}
gSystemOptionsRef = IORegistryEntryFromPath(mainPort, "IOService:/options/options-system");
gSelectedOptionsRef = gOptionsRef;
for (cnt = 1; cnt < argc; cnt++) {
str = argv[cnt];
if (str[0] == '-' && str[1] != 0) {
// Parse the options.
for (str += 1 ; *str; str++) {
switch (*str) {
case 'p' :
#if TARGET_OS_BRIDGE
if (gBridgeToIntel) {
fprintf(stderr, "-p not supported for Mac NVRAM store.\n");
return 1;
}
#endif
PrintOFVariables();
break;
case 'h' :
UsageMessage("");
break;
case 'x' :
if (gPrintInHex) {
fprintf(stderr, "-x not supported with -X hex mode.\n");
return 1;
}
gUseXML = true;
break;
case 'X' :
if (gUseXML) {
fprintf(stderr, "-X hex mode not supported with -x XMLmode.\n");
return 1;
}
gPrintInHex = true;
break;
case 'f':
#if TARGET_OS_BRIDGE
if (gBridgeToIntel) {
fprintf(stderr, "-f not supported for Mac NVRAM store.\n");
return 1;
}
#endif
cnt++;
if (cnt < argc && *argv[cnt] != '-') {
ParseFile(argv[cnt]);
} else {
UsageMessage("missing filename");
}
break;
case 'd':
cnt++;
if (cnt < argc && *argv[cnt] != '-') {
#if TARGET_OS_BRIDGE
if (gBridgeToIntel) {
if ((result = DeleteMacOFVariable(argv[cnt])) != KERN_SUCCESS) {
errx(1, "Error deleting variable - '%s': %s (0x%08x)", argv[cnt],
mach_error_string(result), result);
}
}
else
#endif
{
DeleteOFVariable(argv[cnt]);
}
} else {
UsageMessage("missing name");
}
break;
case 'c':
#if TARGET_OS_BRIDGE
if (gBridgeToIntel) {
fprintf(stderr, "-c not supported for Mac NVRAM store.\n");
return 1;
}
#endif
result = ClearOFVariables();
break;
case 's':
// -s option is unadvertised -- advises the kernel more forcibly to
// commit the variable to nonvolatile storage
gUseForceSync = true;
break;
#if TARGET_OS_BRIDGE
case 'm':
// used to set nvram variables on the Intel side
// from the ARM side (Bridge -> Mac)
fprintf(stdout, "Using Mac NVRAM store.\n");
LinkMacNVRAMSymbols();
gBridgeToIntel = true;
break;
#endif
case 'z':
// -z option is unadvertised -- attempts to use the options-system node
// to write to the system NVRAM region if available
if (gSystemOptionsRef) {
fprintf(stderr, "Selecting options-system node.\n");
gSelectedOptionsRef = gSystemOptionsRef;
} else {
fprintf(stderr, "No options-system node, using options.\n");
}
break;
default:
strcpy(errorMessage, "no such option as --");
errorMessage[strlen(errorMessage)-1] = *str;
UsageMessage(errorMessage);
}
}
} else {
// Other arguments will be firmware variable requests.
argcount++;
SetOrGetOFVariable(str);
}
}
// radar:25206371
if (argcount == 0 && gUseForceSync == true) {
NVRamSyncNow();
}
if (argc == 1) {
UsageMessage("no arguments specified");
}
IOObjectRelease(gOptionsRef);
if (gSystemOptionsRef) {
IOObjectRelease(gSystemOptionsRef);
}
return result;
}
// UsageMessage(message)
//
// Print the usage information and exit.
//
static void UsageMessage(const char *message)
{
warnx("(usage: %s)", message);
printf("nvram [-x|-X] [-p] [-f filename] [-d name] [-c] name[=value] ...\n");
printf("\t-x use XML format for printing or reading variables\n");
printf("\t (must appear before -p or -f)\n");
printf("\t-X use HEX format for printing or reading variables\n");
printf("\t (must appear before -p or -f)\n");
printf("\t-p print all firmware variables\n");
printf("\t-f set firmware variables from a text file\n");
printf("\t-d delete the named variable\n");
printf("\t-c delete all variables\n");
#if TARGET_OS_BRIDGE
printf("\t-m set nvram variables on macOS from bridgeOS\n");
#endif
printf("\tname=value set named variable\n");
printf("\tname print variable\n");
printf("Note that arguments and options are executed in order.\n");
exit(1);
}
// States for ParseFile.
enum {
kFirstColumn = 0,
kScanComment,
kFindName,
kCollectName,
kFindValue,
kCollectValue,
kContinueValue,
kSetenv,
kMaxStringSize = 0x800,
kMaxNameSize = 0x100
};
// ParseFile(fileName)
//
// Open and parse the specified file.
//
static void ParseFile(const char *fileName)
{
long state, ni = 0, vi = 0;
int tc;
char name[kMaxNameSize];
char value[kMaxStringSize];
FILE *patches;
kern_return_t kret;
if (gUseXML) {
ParseXMLFile(fileName);
return;
}
patches = fopen(fileName, "r");
if (patches == 0) {
err(1, "Couldn't open patch file - '%s'", fileName);
}
state = kFirstColumn;
while ((tc = getc(patches)) != EOF) {
if(ni==(kMaxNameSize-1))
errx(1, "Name exceeded max length of %d", kMaxNameSize);
if(vi==(kMaxStringSize-1))
errx(1, "Value exceeded max length of %d", kMaxStringSize);
switch (state) {
case kFirstColumn :
ni = 0;
vi = 0;
if (tc == '#') {
state = kScanComment;
} else if (tc == '\n') {
// state stays kFirstColumn.
} else if (isspace(tc)) {
state = kFindName;
} else {
state = kCollectName;
name[ni++] = tc;
}
break;
case kScanComment :
if (tc == '\n') {
state = kFirstColumn;
} else {
// state stays kScanComment.
}
break;
case kFindName :
if (tc == '\n') {
state = kFirstColumn;
} else if (isspace(tc)) {
// state stays kFindName.
} else {
state = kCollectName;
name[ni++] = tc;
}
break;
case kCollectName :
if (tc == '\n') {
name[ni] = 0;
warnx("Name must be followed by white space - '%s'", name);
state = kFirstColumn;
} else if (isspace(tc)) {
state = kFindValue;
} else {
name[ni++] = tc;
// state staus kCollectName.
}
break;
case kFindValue :
case kContinueValue :
if (tc == '\n') {
state = kSetenv;
} else if (isspace(tc)) {
// state stays kFindValue or kContinueValue.
} else {
state = kCollectValue;
value[vi++] = tc;
}
break;
case kCollectValue :
if (tc == '\n') {
if (value[vi-1] == '\\') {
value[vi-1] = '\r';
state = kContinueValue;
} else {
state = kSetenv;
}
} else {
// state stays kCollectValue.
value[vi++] = tc;
}
break;
}
if (state == kSetenv) {
name[ni] = 0;
value[vi] = 0;
if ((kret = SetOFVariable(name, value)) != KERN_SUCCESS) {
errx(1, "Error setting variable - '%s': %s", name,
mach_error_string(kret));
}
state = kFirstColumn;
}
}
if (state != kFirstColumn) {
errx(1, "Last line ended abruptly");
}
}
// ParseXMLFile(fileName)
//
// Open and parse the specified file in XML format,
// and set variables appropriately.
//
static void ParseXMLFile(const char *fileName)
{
CFPropertyListRef plist;
int fd;
struct stat sb;
char *buffer;
CFReadStreamRef stream;
CFPropertyListFormat format = kCFPropertyListBinaryFormat_v1_0;
fd = open(fileName, O_RDONLY | O_NOFOLLOW, S_IFREG);
if (fd == -1) {
errx(1, "Could not open %s: %s", fileName, strerror(errno));
}
if (fstat(fd, &sb) == -1) {
errx(1, "Could not fstat %s: %s", fileName, strerror(errno));
}
if (sb.st_size > UINT32_MAX) {
errx(1, "too big for our purposes");
}
buffer = malloc((size_t)sb.st_size);
if (buffer == NULL) {
errx(1, "Could not allocate buffer");
}
if (read(fd, buffer, (size_t)sb.st_size) != sb.st_size) {
errx(1, "Could not read %s: %s", fileName, strerror(errno));
}
close(fd);
stream = CFReadStreamCreateWithBytesNoCopy(kCFAllocatorDefault,
(const UInt8 *)buffer,
(CFIndex)sb.st_size,
kCFAllocatorNull);
if (stream == NULL) {
errx(1, "Could not create stream from serialized data");
}
if (!CFReadStreamOpen(stream)) {
errx(1, "Could not open the stream");
}
plist = CFPropertyListCreateWithStream(kCFAllocatorDefault,
stream,
(CFIndex)sb.st_size,
kCFPropertyListImmutable,
&format,
NULL);
if (plist == NULL) {
errx(1, "Error parsing XML file");
}
CFReadStreamClose(stream);
CFRelease(stream);
free(buffer);
CFDictionaryApplyFunction(plist, &SetOFVariableFromFile, 0);
CFRelease(plist);
}
// SetOrGetOFVariable(str)
//
// Parse the input string, then set, append or get
// the specified firmware variable.
//
static void SetOrGetOFVariable(char *str)
{
long set = 0;
long append = 0;
long remove = 0;
const char *name = NULL;
char *value = NULL;
char *substring = NULL;
char *tmp = NULL;
CFStringRef nameRef = NULL;
CFTypeRef valueRef = NULL;
size_t len = 0;
CFMutableDataRef mutableValueRef = NULL;
kern_return_t result;
// OF variable name is first.
name = str;
// Find the equal sign for set, += for append, -= for trim
while (*str) {
if (*str == '+' && *(str+1) == '=') {
append = 1;
*str++ = '\0';
*str++ = '\0';
break;
}
if (*str == '-' && *(str+1) == '=') {
remove = 1;
*str++ = '\0';
*str++ = '\0';
break;
}
if (*str == '=') {
set = 1;
*str++ = '\0';
break;
}
str++;
}
// Read the current value if appending or if no =/+=
if (append == 1 || remove == 1 || (set == 0 && append == 0 && remove == 0)) {
#if TARGET_OS_BRIDGE
if (gBridgeToIntel) {
result = GetMacOFVariable(name, &value);
if (result != KERN_SUCCESS) {
errx(1, "Error getting variable - '%s': %s", name,
mach_error_string(result));
}
nameRef = CFStringCreateWithCString(kCFAllocatorDefault, name, kCFStringEncodingUTF8);
valueRef = CFStringCreateWithCString(kCFAllocatorDefault, value, kCFStringEncodingUTF8);
free(value);
}
else
#endif
{
result = GetOFVariable(name, &nameRef, &valueRef);
if (result != KERN_SUCCESS) {
errx(1, "Error getting variable - '%s': %s", name,
mach_error_string(result));
}
}
}
if (set == 1) {
// On sets, the OF variable's value follows the equal sign.
value = str;
}
if (append == 1) {
// On append, the value to append follows the += substring
if(CFGetTypeID(valueRef) == CFStringGetTypeID()) {
len = strlen(str);
len += CFStringGetMaximumSizeForEncoding(CFStringGetLength(valueRef),
kCFStringEncodingUTF8);
tmp = calloc(len + 1, 1);
if ( (tmp == NULL)
|| (CFStringGetCString(valueRef, tmp, len, kCFStringEncodingUTF8) == false)) {
errx(1, "allocation failed");
}
value = tmp;
strcpy(value + strlen(value), str);
} else if(CFGetTypeID(valueRef) == CFDataGetTypeID()) {
mutableValueRef = CFDataCreateMutableCopy(kCFAllocatorDefault,
CFDataGetLength(valueRef) +
strlen(str) + 1,
valueRef);
CFDataAppendBytes(mutableValueRef, (const UInt8 *)str, strlen(str) + 1);
value = (char *)CFDataGetBytePtr(mutableValueRef);
}
else {
errx(1, "Unsupported named variable CFTypeID");
}
}
if (remove == 1) {
// On remove, the value to remove follows the -= substring
if(CFGetTypeID(valueRef) == CFStringGetTypeID()) {
len = CFStringGetMaximumSizeForEncoding(CFStringGetLength(valueRef),
kCFStringEncodingUTF8);
tmp = calloc(len + 1, 1);
if( (tmp == NULL)
|| (CFStringGetCString(valueRef, tmp, len, kCFStringEncodingUTF8) == false)) {
errx(1, "failed to allocate string");
}
value = tmp;
} else if(CFGetTypeID(valueRef) == CFDataGetTypeID()) {
value = (char *)CFDataGetBytePtr(valueRef);
} else {
errx(1, "Unsupported named variable CFTypeID");
}
substring = strstr(value, str);
if (substring == NULL) {
errx(1, "substring %s not found in %s\n", str, value);
}
len = strlen(str);
memmove(substring, substring + len, strlen(substring + len) + 1);
}
if (set == 1 || append == 1 || remove == 1) {
#if TARGET_OS_BRIDGE
if (gBridgeToIntel) {
result = SetMacOFVariable(name, value);
if (result != KERN_SUCCESS) {
errx(1, "Error setting variable - '%s': %s", name,
mach_error_string(result));
}
}
else
#endif
{
result = SetOFVariable(name, value);
// Try syncing the new data to device, best effort!
NVRamSyncNow();
if (result != KERN_SUCCESS) {
fprintf(stderr, "Error setting variable - '%s': %s.\n", name,
mach_error_string(result));
if (result == kIOReturnNoMemory) {
PrintOFLargestVariables();
}
exit(1);
}
}
} else {
PrintOFVariable(nameRef, valueRef, 0);
}
if (nameRef) CFRelease(nameRef);
if (valueRef) CFRelease(valueRef);
if (tmp) free(tmp);
if (mutableValueRef) CFRelease(mutableValueRef);
}
#if TARGET_OS_BRIDGE
static kern_return_t LinkMacNVRAMSymbols()
{
gDL_handle = dlopen("libMacEFIHostInterface.dylib", RTLD_LAZY);
if (gDL_handle == NULL) {
errx(errno, "Failed to dlopen libMacEFIHostInterface.dylib");
return KERN_FAILURE; /* NOTREACHED */
}
hostInterfaceInitialize_fptr = dlsym(gDL_handle, "hostInterfaceInitialize");
if (hostInterfaceInitialize_fptr == NULL) {
errx(errno, "failed to link hostInterfaceInitialize");
}
createNvramHostInterface_fptr = dlsym(gDL_handle, "createNvramHostInterface");
if (createNvramHostInterface_fptr == NULL) {
errx(errno, "failed to link createNvramHostInterface");
}
destroyNvramHostInterface_fptr = dlsym(gDL_handle, "destroyNvramHostInterface");
if (destroyNvramHostInterface_fptr == NULL) {
errx(errno, "failed to link destroyNvramHostInterface");
}
getNVRAMVariable_fptr = dlsym(gDL_handle, "getNVRAMVariable");
if (getNVRAMVariable_fptr == NULL) {
errx(errno, "failed to link getNVRAMVariable");
}
setNVRAMVariable_fptr = dlsym(gDL_handle, "setNVRAMVariable");
if (setNVRAMVariable_fptr == NULL) {
errx(errno, "failed to link setNVRAMVariable");
}
deleteNVRAMVariable_fptr = dlsym(gDL_handle, "deleteNVRAMVariable");
if (deleteNVRAMVariable_fptr == NULL) {
errx(errno, "failed to link deleteNVRAMVariable");
}
hostInterfaceDeinitialize_fptr = dlsym(gDL_handle, "hostInterfaceDeinitialize");
if (hostInterfaceDeinitialize_fptr == NULL) {
errx(errno, "failed to link hostInterfaceDeinitialize");
}
/* also do the initialization */
hostInterfaceInitialize_fptr();
gNvramInterface = createNvramHostInterface_fptr(NULL);
return KERN_SUCCESS;
}
#endif
// GetOFVariable(name, nameRef, valueRef)
//
// Get the named firmware variable.
// Return it and it's symbol in valueRef and nameRef.
//
static kern_return_t GetOFVariable(const char *name, CFStringRef *nameRef,
CFTypeRef *valueRef)
{
*nameRef = CFStringCreateWithCString(kCFAllocatorDefault, name,
kCFStringEncodingUTF8);
if (*nameRef == 0) {
errx(1, "Error creating CFString for key %s", name);
}
*valueRef = IORegistryEntryCreateCFProperty(gSelectedOptionsRef, *nameRef, 0, 0);
if (*valueRef == 0) return kIOReturnNotFound;
return KERN_SUCCESS;
}
#if TARGET_OS_BRIDGE
// GetMacOFVariable(name, value)
//
// Get the named firmware variable from the Intel side.
// Return the value in value
//
static kern_return_t GetMacOFVariable(char *name, char **value)
{
uint32_t value_size;
return getNVRAMVariable_fptr(gNvramInterface, name, value, &value_size);
}
#endif
// SetOFVariable(name, value)
//
// Set or create an firmware variable with name and value.
//
static kern_return_t SetOFVariable(const char *name, const char *value)
{
CFStringRef nameRef;
CFTypeRef valueRef;
CFTypeID typeID;
kern_return_t result = KERN_SUCCESS;
nameRef = CFStringCreateWithCString(kCFAllocatorDefault, name,
kCFStringEncodingUTF8);
if (nameRef == 0) {
errx(1, "Error creating CFString for key %s", name);
}
valueRef = IORegistryEntryCreateCFProperty(gSelectedOptionsRef, nameRef, 0, 0);
if (valueRef) {
typeID = CFGetTypeID(valueRef);
CFRelease(valueRef);
valueRef = ConvertValueToCFTypeRef(typeID, value);
if (valueRef == 0) {
errx(1, "Error creating CFTypeRef for value %s", value);
}
result = IORegistryEntrySetCFProperty(gSelectedOptionsRef, nameRef, valueRef);
} else {
// In the default case, try data, string, number, then boolean.
CFTypeID types[] = {CFDataGetTypeID(),
CFStringGetTypeID(), CFNumberGetTypeID(),CFBooleanGetTypeID() };
for (int i = 0; i < sizeof(types)/sizeof(types[0]); i++) {
valueRef = ConvertValueToCFTypeRef(types[i], value);
if (valueRef != 0) {
result = IORegistryEntrySetCFProperty(gSelectedOptionsRef, nameRef, valueRef);
if (result == KERN_SUCCESS || result == kIOReturnNoMemory || result == kIOReturnNoSpace) {
break;
}
}
}
}
CFRelease(nameRef);
return result;
}
#if TARGET_OS_BRIDGE
static kern_return_t SetMacOFVariable(char *name, char *value)
{
return setNVRAMVariable_fptr(gNvramInterface, name, value);
}
#endif
// DeleteOFVariable(name)
//
// Delete the named firmware variable.
//
static void DeleteOFVariable(const char *name)
{
SetOFVariable(kIONVRAMDeletePropertyKey, name);
}
#if TARGET_OS_BRIDGE
static kern_return_t DeleteMacOFVariable(char *name)
{
return deleteNVRAMVariable_fptr(gNvramInterface, name);
}
#endif
static void NVRamSyncNow(void)
{
if (!gUseForceSync) {
SetOFVariable(kIONVRAMSyncNowPropertyKey, kIONVRAMSyncNowPropertyKey);
} else {
SetOFVariable(kIONVRAMForceSyncNowPropertyKey, kIONVRAMForceSyncNowPropertyKey);
}
}
CFDictionaryRef CreateMyDictionary(void) {
// root
CFMutableDictionaryRef dict0 = CFDictionaryCreateMutable(kCFAllocatorDefault, 0,
&kCFTypeDictionaryKeyCallBacks,
&kCFTypeDictionaryValueCallBacks);
// APPLE_BOOT_VARIABLE_GUID
// Print all of the firmware variables.
CFMutableDictionaryRef dict1;
kern_return_t result;
result = IORegistryEntryCreateCFProperties(gOptionsRef, &dict1, 0, 0);
if (result != KERN_SUCCESS) {
errx(1, "Error getting the firmware variables: %s", mach_error_string(result));
}
CFDictionarySetValue(dict0, CFSTR(gAppleBootGuid), dict1);
CFRelease(dict1);
CFMutableDictionaryRef dict2 = CFDictionaryCreateMutable(NULL, 0, &kCFTypeDictionaryKeyCallBacks,
&kCFTypeDictionaryValueCallBacks);
CFDictionarySetValue(dict0, CFSTR(gEfiGlobalVariableGuid), dict2);
// EFI_GLOBAL_VARIABLE_GUID
// Print the given firmware variable.
CFStringRef nameRef;
CFTypeRef valueRef;
const char *key[32];
char name[64];
CFStringRef var;
int i = 0;
int n = 0; // num of keys in this GUID
key[n++] = "Boot0080";
key[n++] = "BootOrder";
key[n++] = "BootNext";
key[n++] = "Boot0081";
key[n++] = "Boot0082";
key[n++] = "Boot0083";
key[n++] = "BootCurrent";
for ( i = 0; i < n; i++ ) {
snprintf(name, sizeof(name), "%s:%s", gEfiGlobalVariableGuid, key[i]);
var = CFStringCreateWithCString(NULL, key[i], kCFStringEncodingUTF8);
result = GetOFVariable(name, &nameRef, &valueRef);
if (result == KERN_SUCCESS) {
CFDictionaryAddValue (dict2, var, valueRef);
CFRelease(valueRef);
}
CFRelease(nameRef);
}
CFRelease(dict2);
// APPLE_WIRELESS_NETWORK_VARIABLE_GUID
CFMutableDictionaryRef dict3 = CFDictionaryCreateMutable(NULL, 0, &kCFTypeDictionaryKeyCallBacks,
&kCFTypeDictionaryValueCallBacks);
CFDictionarySetValue(dict0, CFSTR(gAppleNetworkGuid), dict3);
n = 0; // num of keys in this GUID
key[n++] = "current-network";
key[n++] = "preferred-count";
key[n++] = "preferred-networks";
for ( i = 0; i < n; i++ ) {
snprintf(name, sizeof(name), "%s:%s", gAppleNetworkGuid, key[i]);
var = CFStringCreateWithCString(NULL, key[i], kCFStringEncodingUTF8);
result = GetOFVariable(name, &nameRef, &valueRef);
if (result == KERN_SUCCESS) {
CFDictionaryAddValue (dict3, var, valueRef);
CFRelease(valueRef);
}
CFRelease(nameRef);
}
CFRelease(dict3);
// APPLE_SECURE_BOOT_VARIABLE_GUID
CFMutableDictionaryRef dict4 = CFDictionaryCreateMutable(NULL, 0, &kCFTypeDictionaryKeyCallBacks,
&kCFTypeDictionaryValueCallBacks);
CFDictionarySetValue(dict0, CFSTR(gAppleSecureBootGuid), dict4);
n = 0; // num of keys in this GUID
key[n++] = "ApECID";
key[n++] = "ApChipID";
key[n++] = "ApBoardID";
key[n++] = "ApSecurityDomain";
key[n++] = "ApProductionStatus";
key[n++] = "ApSecurityMode";
key[n++] = "EffectiveProductionStatus";
key[n++] = "EffectiveSecurityMode";
key[n++] = "CertificateEpoch";
key[n++] = "MixNMatchPreventionStatus";
key[n++] = "CryptoDigestMethod";
key[n++] = "HardwareModel";
key[n++] = "InternalUseOnlyUnit";
for ( i = 0; i < n; i++ ) {
snprintf(name, sizeof(name), "%s:%s", gAppleSecureBootGuid, key[i]);
var = CFStringCreateWithCString(NULL, key[i], kCFStringEncodingUTF8);
result = GetOFVariable(name, &nameRef, &valueRef);
if (result == KERN_SUCCESS) {
CFDictionaryAddValue (dict4, var, valueRef);
CFRelease(valueRef);
}
CFRelease(nameRef);
}
CFRelease(dict4);
CFMutableDictionaryRef dict5 = CFDictionaryCreateMutable(NULL, 0, &kCFTypeDictionaryKeyCallBacks,
&kCFTypeDictionaryValueCallBacks);
CFDictionarySetValue(dict0, CFSTR(gAppleNvramGuid), dict5);
n=0;
key[n++] = "gfx-saved-config-restore-status";
key[n++] = "SkipLogo";
key[n++] = "IASCurrentInstallPhase";
key[n++] = "IASInstallPhaseList";
for ( i = 0; i < n; i++ ) {
snprintf(name, sizeof(name), "%s:%s", gAppleNvramGuid, key[i]);
var = CFStringCreateWithCString(NULL, key[i], kCFStringEncodingUTF8);
result = GetOFVariable(name, &nameRef, &valueRef);
if (result == KERN_SUCCESS) {
CFDictionaryAddValue (dict5, var, valueRef);
CFRelease(valueRef);
}
CFRelease(nameRef);
}
CFRelease(dict5);
return dict0;
}
// PrintOFVariables()
//
// Print all of the firmware variables.
//
static void PrintOFVariables(void)
{
kern_return_t result;
CFMutableDictionaryRef dict;
result = IORegistryEntryCreateCFProperties(gSelectedOptionsRef, &dict, 0, 0);
if (result != KERN_SUCCESS) {
errx(1, "Error getting the firmware variables: %s", mach_error_string(result));
}
if (gUseXML) {
CFDataRef data;
CFPropertyListRef propertyList = CreateMyDictionary();
data = CFPropertyListCreateData( kCFAllocatorDefault, propertyList, kCFPropertyListXMLFormat_v1_0, 0, NULL );
// data = CFPropertyListCreateData( kCFAllocatorDefault, dict, kCFPropertyListXMLFormat_v1_0, 0, NULL );
if (data == NULL) {
errx(1, "Error converting variables to xml");
}
fwrite(CFDataGetBytePtr(data), sizeof(UInt8), CFDataGetLength(data), stdout);
CFRelease(data);
} else {
CFDictionaryApplyFunction(dict, &PrintOFVariable, 0);
}
CFRelease(dict);
}
static size_t
ElementSize(const void *value)
{
CFTypeID typeId = CFGetTypeID(value);
if (typeId == CFStringGetTypeID()) {
return CFStringGetLength(value);
}
else if (typeId == CFDataGetTypeID()) {
return CFDataGetLength(value);
}
else if (typeId == CFNumberGetTypeID()) {
return 8;
}
return 0;
}
// PrintOFLargestVariables()
//
// Print the LARGEST_COUNT largest
// nvram variables.
//
void
PrintOFLargestVariables(void)
{
#define LARGEST_COUNT 5
kern_return_t result;
CFMutableDictionaryRef dict;
long count;
void **keys, **values;
size_t *indices;
result = IORegistryEntryCreateCFProperties(gOptionsRef, &dict, 0, 0);
if (result != KERN_SUCCESS) {
errx(1, "Error getting the firmware variables: %s", mach_error_string(result));
}
count = CFDictionaryGetCount(dict);
keys = calloc(count, sizeof(void *));
//os_assert(keys != NULL);
values = calloc(count, sizeof(void *));
//os_assert(values != NULL);
indices = calloc(count, sizeof(*indices));
//os_assert(indices != NULL);
for (size_t i = 0; i < count; i++) {
indices[i] = i;
}
CFDictionaryGetKeysAndValues(dict, (const void **)keys, (const void **)values);
qsort_b(indices, count, sizeof(*indices), ^(const void *a, const void *b) {
return (int)(((int64_t)ElementSize(values[*(size_t*)b]) - (int64_t)(ElementSize(values[*(size_t*)a]))));
});
fprintf(stderr, "key\tbytes\n");
for (long i = 0; i < count && i < LARGEST_COUNT; i++) {
size_t size = ElementSize(values[indices[i]]);
if (size > 0) {
fprintf(stderr, "%s\t%zu\n", CFStringGetCStringPtr(keys[indices[i]], kCFStringEncodingUTF8
), size);
}
}
free(keys);
free(values);
free(indices);
CFRelease(dict);
}
// PrintOFVariable(key, value, context)
//
// Print the given firmware variable.
//
static void PrintOFVariable(const void *key, const void *value, void *context)
{
long cnt, cnt2;
CFIndex nameLen;
char *nameBuffer = 0;
const char *nameString;
char numberBuffer[10];
const uint8_t *dataPtr;
uint8_t dataChar;
char *dataBuffer = 0;
CFIndex valueLen;
char *valueBuffer = 0;
const char *valueString = 0;
uint32_t number;
long length;
CFTypeID typeID;
if (gUseXML) {
CFDataRef data;
CFDictionaryRef dict = CFDictionaryCreate(kCFAllocatorDefault, &key, &value, 1,
&kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
if (dict == NULL) {
errx(1, "Error creating dictionary for variable value");
}
data = CFPropertyListCreateData( kCFAllocatorDefault, dict, kCFPropertyListXMLFormat_v1_0, 0, NULL );
if (data == NULL) {
errx(1, "Error creating xml plist for variable");
}
fwrite(CFDataGetBytePtr(data), sizeof(UInt8), CFDataGetLength(data), stdout);
CFRelease(dict);
CFRelease(data);
return;
}
// Get the OF variable's name.
nameLen = CFStringGetMaximumSizeForEncoding(CFStringGetLength(key),
kCFStringEncodingUTF8) + 1;
nameBuffer = malloc(nameLen);
if( nameBuffer && CFStringGetCString(key, nameBuffer, nameLen, kCFStringEncodingUTF8) )
nameString = nameBuffer;
else {
warnx("Unable to convert property name to C string");
nameString = "<UNPRINTABLE>";
}
// Get the OF variable's type.
typeID = CFGetTypeID(value);
if (typeID == CFBooleanGetTypeID()) {
if (CFBooleanGetValue(value)) valueString = "true";
else valueString = "false";
} else if (typeID == CFNumberGetTypeID()) {
CFNumberGetValue(value, kCFNumberSInt32Type, &number);
if (number == 0xFFFFFFFF) sprintf(numberBuffer, "-1");
else if (!gPrintInHex && number < 1000) sprintf(numberBuffer, "%d", number);
else sprintf(numberBuffer, "0x%x", number);
valueString = numberBuffer;
} else if (typeID == CFStringGetTypeID()) {
valueLen = CFStringGetMaximumSizeForEncoding(CFStringGetLength(value),
kCFStringEncodingUTF8) + 1;
valueBuffer = malloc(valueLen + 1);
if ( valueBuffer && CFStringGetCString(value, valueBuffer, valueLen, kCFStringEncodingUTF8) )
valueString = valueBuffer;
else {
warnx("Unable to convert value to C string");
valueString = "<UNPRINTABLE>";
}
} else if (typeID == CFDataGetTypeID()) {
length = CFDataGetLength(value);
if (length == 0) valueString = "";
else {
dataBuffer = malloc(length * 3 + 3);
if (dataBuffer != 0) {
dataPtr = CFDataGetBytePtr(value);
cnt = cnt2 = 0;
if (gPrintInHex) {
sprintf(dataBuffer, "0x");
cnt2 += 2;
}
for (; cnt < length; cnt++) {
dataChar = dataPtr[cnt];
if (gPrintInHex) {
sprintf(dataBuffer + cnt2, "%02x", dataChar);
cnt2 += 2;
} else if (!gPrintInHex && isprint(dataChar) && dataChar != '%') {
dataBuffer[cnt2++] = dataChar;
} else {
sprintf(dataBuffer + cnt2, "%%%02x", dataChar);
cnt2 += 3;
}
}
dataBuffer[cnt2] = '\0';
valueString = dataBuffer;
}
}
} else {
valueString="<INVALID>";
}
if ((nameString != 0) && (valueString != 0))
printf("%s\t%s\n", nameString, valueString);
if (dataBuffer != 0) free(dataBuffer);
if (nameBuffer != 0) free(nameBuffer);
if (valueBuffer != 0) free(valueBuffer);
}
// ClearOFVariables()
//
// Deletes all OF variables
//
static int ClearOFVariables(void)
{
kern_return_t result;
CFMutableDictionaryRef dict;
result = IORegistryEntryCreateCFProperties(gSelectedOptionsRef, &dict, 0, 0);
if (result != KERN_SUCCESS) {
errx(1, "Error getting the firmware variables: %s", mach_error_string(result));
}
CFDictionaryApplyFunction(dict, &ClearOFVariable, &result);
CFRelease(dict);
return result;
}
static void ClearOFVariable(const void *key, const void *value, void *context)
{
kern_return_t result;
result = IORegistryEntrySetCFProperty(gSelectedOptionsRef,
CFSTR(kIONVRAMDeletePropertyKey), key);
if (result != KERN_SUCCESS) {
assert(CFGetTypeID(key) == CFStringGetTypeID());
const char *keyStr = CFStringGetCStringPtr(key, kCFStringEncodingUTF8);
char *keyBuffer = NULL;
size_t keyBufferLen = 0;
if (!keyStr) {
keyBufferLen = CFStringGetMaximumSizeForEncoding(CFStringGetLength(key), kCFStringEncodingUTF8) + 1;
keyBuffer = (char *)malloc(keyBufferLen);
if (keyBuffer != NULL && CFStringGetCString(key, keyBuffer, keyBufferLen, kCFStringEncodingUTF8)) {
keyStr = keyBuffer;
} else {
warnx("Unable to convert property name to C string");
keyStr = "<UNPRINTABLE>";
}
}
warnx("Error clearing firmware variable %s: %s", keyStr, mach_error_string(result));
if (keyBuffer) {
free(keyBuffer);
}
if (context) {
*(int *)context = result;
}
}
}
// ConvertValueToCFTypeRef(typeID, value)
//
// Convert the value into a CFType given the typeID.
//
static CFTypeRef ConvertValueToCFTypeRef(CFTypeID typeID, const char *value)
{
CFTypeRef valueRef = 0;
long cnt, cnt2, length;
unsigned long number, tmp;
if (typeID == CFBooleanGetTypeID()) {
if (!strcmp("true", value)) valueRef = kCFBooleanTrue;
else if (!strcmp("false", value)) valueRef = kCFBooleanFalse;
} else if (typeID == CFNumberGetTypeID()) {
number = strtol(value, 0, 0);
valueRef = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type,
&number);
} else if (typeID == CFStringGetTypeID()) {
valueRef = CFStringCreateWithCString(kCFAllocatorDefault, value,
kCFStringEncodingUTF8);
} else if (typeID == CFDataGetTypeID()) {
length = strlen(value);
char valueCopy[length + 1];
for (cnt = cnt2 = 0; cnt < length; cnt++, cnt2++) {
if (value[cnt] == '%') {
if ((cnt + 2 > length) ||
!ishexnumber(value[cnt + 1]) ||
!ishexnumber(value[cnt + 2])) return 0;
number = toupper(value[++cnt]) - '0';
if (number > 9) number -= 7;
tmp = toupper(value[++cnt]) - '0';
if (tmp > 9) tmp -= 7;
number = (number << 4) + tmp;
valueCopy[cnt2] = number;
} else valueCopy[cnt2] = value[cnt];
}
valueRef = CFDataCreate(kCFAllocatorDefault, (const UInt8 *)valueCopy, cnt2);
} else return 0;
return valueRef;
}
static void SetOFVariableFromFile(const void *key, const void *value, void *context)
{
kern_return_t result;
result = IORegistryEntrySetCFProperty(gSelectedOptionsRef, key, value);
if ( result != KERN_SUCCESS ) {
long nameLen;
char *nameBuffer;
char *nameString;
// Get the variable's name.
nameLen = CFStringGetMaximumSizeForEncoding(CFStringGetLength(key),
kCFStringEncodingUTF8) + 1;
nameBuffer = malloc(nameLen);
if( nameBuffer && CFStringGetCString(key, nameBuffer, nameLen, kCFStringEncodingUTF8) )
nameString = nameBuffer;
else {
warnx("Unable to convert property name to C string");
nameString = "<UNPRINTABLE>";
}
errx(1, "Error setting variable - '%s': %s", nameString,
mach_error_string(result));
}
}
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