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/*
* Copyright 2012 <James.Bottomley@HansenPartnership.com>
*
* see COPYING file
*
* Read and dump all the secure variables
*/
#include <efi.h>
#include <efilib.h>
#include <simple_file.h>
#include <guid.h>
#include <variables.h>
#include <shell.h>
#include <x509.h>
#include <sha256.h>
#include "efiauthenticated.h"
void
parse_db(UINT8 *data, UINTN len, EFI_HANDLE image, CHAR16 *name, int save_file)
{
EFI_SIGNATURE_LIST *CertList = (EFI_SIGNATURE_LIST *)data;
EFI_SIGNATURE_DATA *Cert;
UINTN count = 0, DataSize = len;
EFI_FILE *file;
CHAR16 *buf = AllocatePool(StrSize(name) + 4 + 2 + 4 + 8 +100);
CHAR16 *ext;
EFI_STATUS status;
int size;
certlist_for_each_certentry(CertList, data, size, DataSize) {
int Index = 0;
count++;
if (CompareGuid(&CertList->SignatureType, &X509_GUID) == 0) {
ext = L"X509";
} else if (CompareGuid(&CertList->SignatureType, &RSA2048_GUID) == 0) {
ext = L"RSA2048";
} else if (CompareGuid(&CertList->SignatureType, &PKCS7_GUID) == 0) {
ext = L"PKCS7";
} else if (CompareGuid(&CertList->SignatureType, &EFI_CERT_SHA256_GUID) == 0) {
ext = L"SHA256";
} else {
ext = L"Unknown";
}
Print(L"%s: List %d, type %s\n", name, count, ext);
certentry_for_each_cert(Cert, CertList) {
Print(L" Signature %d, size %d, owner %g\n",
Index++, CertList->SignatureSize,
&Cert->SignatureOwner);
if (StrCmp(ext, L"X509") == 0) {
CHAR16 buf1[4096];
x509_to_str(Cert->SignatureData,
CertList->SignatureSize,
X509_OBJ_SUBJECT, buf1,
sizeof(buf1));
Print(L" Subject: %s\n", buf1);
x509_to_str(Cert->SignatureData,
CertList->SignatureSize,
X509_OBJ_ISSUER, buf1,
sizeof(buf1));
Print(L" Issuer: %s\n", buf1);
} else if (StrCmp(ext, L"SHA256") == 0) {
CHAR16 buf1[256];
StrCpy(buf1, L"Hash: ");
sha256_StrCat_hash(buf1, Cert->SignatureData);
Print(L" %s\n", buf1);
}
if (save_file) {
SPrint(buf, 0, L"%s-%d-%d-%s-%g", name, count, Index, ext, &Cert->SignatureOwner);
Print(L"Writing to file %s\n", buf);
status = simple_file_open(image, buf, &file, EFI_FILE_MODE_READ | EFI_FILE_MODE_WRITE | EFI_FILE_MODE_CREATE);
if (status != EFI_SUCCESS) {
Print(L"Failed to open file %s: %d\n", buf, status);
continue;
}
status = simple_file_write_all(file, CertList->SignatureSize-sizeof(EFI_GUID), Cert->SignatureData);
simple_file_close(file);
if (status != EFI_SUCCESS) {
Print(L"Failed to write signature to file %s: %d\n", buf, status);
continue;
}
}
}
}
FreePool(buf);
}
EFI_STATUS
efi_main (EFI_HANDLE image, EFI_SYSTEM_TABLE *systab)
{
EFI_STATUS status;
CHAR16 **variables;
EFI_GUID *owners;
CHAR16 **ARGV, *progname;
UINT8 *data;
UINTN len;
int i, argc, save_keys = 0, no_print = 0;
InitializeLib(image, systab);
if (GetOSIndications() & EFI_OS_INDICATIONS_TIMESTAMP_REVOCATION) {
variables = (CHAR16 *[]){ L"PK", L"KEK", L"db", L"dbx", L"dbt", L"MokList" , NULL};
owners = (EFI_GUID []){ GV_GUID, GV_GUID, SIG_DB, SIG_DB, SIG_DB, MOK_OWNER };
} else {
variables = (CHAR16 *[]){ L"PK", L"KEK", L"db", L"dbx", L"MokList" , NULL};
owners = (EFI_GUID []){ GV_GUID, GV_GUID, SIG_DB, SIG_DB, MOK_OWNER };
}
status = argsplit(image, &argc, &ARGV);
if (status != EFI_SUCCESS) {
Print(L"Failed to parse arguments: %d\n", status);
return status;
}
progname = ARGV[0];
while (argc > 1 && ARGV[1][0] == L'-') {
if (StrCmp(ARGV[1], L"-s") == 0) {
save_keys = 1;
ARGV += 1;
argc -= 1;
} else if (StrCmp(ARGV[1], L"-n") == 0) {
no_print = 1;
ARGV += 1;
argc -= 1;
} else {
/* unrecognised option */
break;
}
}
if ((argc != 2 && argc != 1) || (argc != 1 && no_print)) {
Print(L"Usage: %s: [-s|-n] [var]\n", progname);
return EFI_INVALID_PARAMETER;
}
if (argc == 1) {
for (i = 0; variables[i] != NULL; i++) {
status = get_variable(variables[i], &data, &len, owners[i]);
if (status == EFI_NOT_FOUND) {
Print(L"Variable %s has no entries\n", variables[i]);
} else if (status != EFI_SUCCESS) {
Print(L"Failed to get %s: %d\n", variables[i], status);
} else {
Print(L"Variable %s length %d\n", variables[i], len);
parse_db(data, len, image, variables[i], save_keys);
FreePool(data);
}
}
} else {
CHAR16 *var = ARGV[1];
for(i = 0; variables[i] != NULL; i++) {
if (StrCmp(var, variables[i]) == 0) {
break;
}
}
if (variables[i]== NULL) {
Print(L"Invalid Variable %s\nVariable must be one of: ", var);
for (i = 0; variables[i] != NULL; i++)
Print(L"%s ", variables[i]);
Print(L"\n");
return EFI_INVALID_PARAMETER;
}
status = get_variable(variables[i], &data, &len, owners[i]);
if (status == EFI_NOT_FOUND) {
Print(L"Variable %s has no entries\n", variables[i]);
} else if (status != EFI_SUCCESS) {
Print(L"Failed to get %s: %d\n", variables[i], status);
} else {
Print(L"Variable %s length %d\n", variables[i], len);
parse_db(data, len, image, variables[i], save_keys);
FreePool(data);
parse_db(data, len, image, variables[i], save_keys);
}
}
return EFI_SUCCESS;
}
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