#include <efi.h>
#include <efilib.h>
+#include <stdarg.h>
#include <Library/BaseCryptLib.h>
#include <openssl/x509.h>
+#include <openssl/x509v3.h>
+#include <openssl/asn1.h>
+#include <openssl/bn.h>
+
#include "shim.h"
-#define PASSWORD_MAX 16
-#define PASSWORD_MIN 8
+#define PASSWORD_MAX 256
+#define PASSWORD_MIN 1
+#define SB_PASSWORD_LEN 16
-struct menu_item {
- CHAR16 *text;
- UINTN (* callback)(void *data, void *data2);
- void *data;
- void *data2;
- UINTN colour;
-};
+#define NAME_LINE_MAX 70
+
+#ifndef SHIM_VENDOR
+#define SHIM_VENDOR L"Shim"
+#endif
+
+#define CERT_STRING L"Select an X509 certificate to enroll:\n\n"
+#define HASH_STRING L"Select a file to trust:\n\n"
typedef struct {
UINT32 MokSize;
UINT8 *Mok;
+ EFI_GUID Type;
} __attribute__ ((packed)) MokListNode;
-static EFI_INPUT_KEY get_keystroke (void)
-{
- EFI_INPUT_KEY key;
- UINTN EventIndex;
+typedef struct {
+ UINT32 MokSBState;
+ UINT32 PWLen;
+ CHAR16 Password[SB_PASSWORD_LEN];
+} __attribute__ ((packed)) MokSBvar;
- uefi_call_wrapper(BS->WaitForEvent, 3, 1, &ST->ConIn->WaitForKey,
- &EventIndex);
- uefi_call_wrapper(ST->ConIn->ReadKeyStroke, 2, ST->ConIn, &key);
+typedef struct {
+ UINT32 MokDBState;
+ UINT32 PWLen;
+ CHAR16 Password[SB_PASSWORD_LEN];
+} __attribute__ ((packed)) MokDBvar;
- return key;
-}
+typedef struct {
+ INT32 Timeout;
+} __attribute__ ((packed)) MokTimeoutvar;
-static EFI_STATUS get_sha1sum (void *Data, int DataSize, UINT8 *hash)
+static EFI_STATUS get_sha1sum(void *Data, int DataSize, UINT8 * hash)
{
- EFI_STATUS status;
+ EFI_STATUS efi_status;
unsigned int ctxsize;
void *ctx = NULL;
ctx = AllocatePool(ctxsize);
if (!ctx) {
- Print(L"Unable to allocate memory for hash context\n");
+ console_notify(L"Unable to allocate memory for hash context");
return EFI_OUT_OF_RESOURCES;
}
if (!Sha1Init(ctx)) {
- Print(L"Unable to initialise hash\n");
- status = EFI_OUT_OF_RESOURCES;
+ console_notify(L"Unable to initialise hash");
+ efi_status = EFI_OUT_OF_RESOURCES;
goto done;
}
if (!(Sha1Update(ctx, Data, DataSize))) {
- Print(L"Unable to generate hash\n");
- status = EFI_OUT_OF_RESOURCES;
+ console_notify(L"Unable to generate hash");
+ efi_status = EFI_OUT_OF_RESOURCES;
goto done;
}
if (!(Sha1Final(ctx, hash))) {
- Print(L"Unable to finalise hash\n");
- status = EFI_OUT_OF_RESOURCES;
+ console_notify(L"Unable to finalise hash");
+ efi_status = EFI_OUT_OF_RESOURCES;
goto done;
}
- status = EFI_SUCCESS;
+ efi_status = EFI_SUCCESS;
done:
- return status;
+ return efi_status;
}
-static MokListNode *build_mok_list(UINT32 num, void *Data, UINTN DataSize) {
- MokListNode *list;
- INT64 remain = DataSize;
- int i;
- void *ptr;
-
- if (DataSize < sizeof(UINT32))
- return NULL;
-
- list = AllocatePool(sizeof(MokListNode) * num);
-
- if (!list) {
- Print(L"Unable to allocate MOK list\n");
- return NULL;
- }
-
- ptr = Data;
- for (i = 0; i < num; i++) {
- CopyMem(&list[i].MokSize, ptr, sizeof(UINT32));
- remain -= sizeof(UINT32) + list[i].MokSize;
-
- if (remain < 0) {
- Print(L"the list was corrupted\n");
- FreePool(list);
- return NULL;
- }
-
- ptr += sizeof(UINT32);
- list[i].Mok = ptr;
- ptr += list[i].MokSize;
- }
-
- return list;
+static BOOLEAN is_sha2_hash(EFI_GUID Type)
+{
+ if (CompareGuid(&Type, &EFI_CERT_SHA224_GUID) == 0)
+ return TRUE;
+ else if (CompareGuid(&Type, &EFI_CERT_SHA256_GUID) == 0)
+ return TRUE;
+ else if (CompareGuid(&Type, &EFI_CERT_SHA384_GUID) == 0)
+ return TRUE;
+ else if (CompareGuid(&Type, &EFI_CERT_SHA512_GUID) == 0)
+ return TRUE;
+
+ return FALSE;
}
-static void print_x509_name (X509_NAME *X509Name, CHAR16 *name)
+static UINT32 sha_size(EFI_GUID Type)
{
- char *str;
+ if (CompareGuid(&Type, &EFI_CERT_SHA1_GUID) == 0)
+ return SHA1_DIGEST_SIZE;
+ else if (CompareGuid(&Type, &EFI_CERT_SHA224_GUID) == 0)
+ return SHA224_DIGEST_LENGTH;
+ else if (CompareGuid(&Type, &EFI_CERT_SHA256_GUID) == 0)
+ return SHA256_DIGEST_SIZE;
+ else if (CompareGuid(&Type, &EFI_CERT_SHA384_GUID) == 0)
+ return SHA384_DIGEST_LENGTH;
+ else if (CompareGuid(&Type, &EFI_CERT_SHA512_GUID) == 0)
+ return SHA512_DIGEST_LENGTH;
- str = X509_NAME_oneline(X509Name, NULL, 0);
- if (str) {
- Print(L" %s:\n %a\n", name, str);
- OPENSSL_free(str);
- }
+ return 0;
}
-static const char *mon[12]= {
-"Jan","Feb","Mar","Apr","May","Jun",
-"Jul","Aug","Sep","Oct","Nov","Dec"
-};
-
-static void print_x509_GENERALIZEDTIME_time (ASN1_TIME *time, CHAR16 *time_string)
+static BOOLEAN is_valid_siglist(EFI_GUID Type, UINT32 SigSize)
{
- char *v;
- int gmt = 0;
- int i;
- int y = 0,M = 0,d = 0,h = 0,m = 0,s = 0;
- char *f = NULL;
- int f_len = 0;
+ UINT32 hash_sig_size;
- i=time->length;
- v=(char *)time->data;
+ if (CompareGuid (&Type, &X509_GUID) == 0 && SigSize != 0)
+ return TRUE;
- if (i < 12)
- goto error;
+ if (!is_sha2_hash(Type))
+ return FALSE;
- if (v[i-1] == 'Z')
- gmt=1;
+ hash_sig_size = sha_size(Type) + sizeof(EFI_GUID);
+ if (SigSize != hash_sig_size)
+ return FALSE;
- for (i=0; i<12; i++) {
- if ((v[i] > '9') || (v[i] < '0'))
- goto error;
- }
+ return TRUE;
+}
- y = (v[0]-'0')*1000+(v[1]-'0')*100 + (v[2]-'0')*10+(v[3]-'0');
- M = (v[4]-'0')*10+(v[5]-'0');
+static UINT32 count_keys(void *Data, UINTN DataSize)
+{
+ EFI_SIGNATURE_LIST *CertList = Data;
+ UINTN dbsize = DataSize;
+ UINT32 MokNum = 0;
+ void *end = Data + DataSize;
+
+ while ((dbsize > 0) && (dbsize >= CertList->SignatureListSize)) {
+ /* Use ptr arithmetics to ensure bounded access. Do not allow 0
+ * SignatureListSize that will cause endless loop. */
+ if ((void *)(CertList + 1) > end
+ || CertList->SignatureListSize == 0) {
+ console_notify
+ (L"Invalid MOK detected! Ignoring MOK List.");
+ return 0;
+ }
- if ((M > 12) || (M < 1))
- goto error;
+ if (CertList->SignatureListSize == 0 ||
+ CertList->SignatureListSize <= CertList->SignatureSize) {
+ console_errorbox(L"Corrupted signature list");
+ return 0;
+ }
- d = (v[6]-'0')*10+(v[7]-'0');
- h = (v[8]-'0')*10+(v[9]-'0');
- m = (v[10]-'0')*10+(v[11]-'0');
-
- if (time->length >= 14 &&
- (v[12] >= '0') && (v[12] <= '9') &&
- (v[13] >= '0') && (v[13] <= '9')) {
- s = (v[12]-'0')*10+(v[13]-'0');
- /* Check for fractions of seconds. */
- if (time->length >= 15 && v[14] == '.') {
- int l = time->length;
- f = &v[14]; /* The decimal point. */
- f_len = 1;
- while (14 + f_len < l && f[f_len] >= '0' &&
- f[f_len] <= '9')
- ++f_len;
+ if (!is_valid_siglist
+ (CertList->SignatureType, CertList->SignatureSize)) {
+ console_errorbox(L"Invalid signature list found");
+ return 0;
}
+
+ MokNum++;
+ dbsize -= CertList->SignatureListSize;
+ CertList = (EFI_SIGNATURE_LIST *) ((UINT8 *) CertList +
+ CertList->SignatureListSize);
}
- SPrint(time_string, 0, L"%a %2d %02d:%02d:%02d%.*a %d%a",
- mon[M-1], d, h, m, s, f_len, f, y, (gmt)?" GMT":"");
-error:
- return;
+ return MokNum;
}
-static void print_x509_UTCTIME_time (ASN1_TIME *time, CHAR16 *time_string)
+static MokListNode *build_mok_list(UINT32 num, void *Data, UINTN DataSize)
{
- char *v;
- int gmt=0;
- int i;
- int y = 0,M = 0,d = 0,h = 0,m = 0,s = 0;
+ MokListNode *list;
+ EFI_SIGNATURE_LIST *CertList = Data;
+ EFI_SIGNATURE_DATA *Cert;
+ UINTN dbsize = DataSize;
+ UINTN count = 0;
+ void *end = Data + DataSize;
- i=time->length;
- v=(char *)time->data;
+ list = AllocatePool(sizeof(MokListNode) * num);
+ if (!list) {
+ console_notify(L"Unable to allocate MOK list");
+ return NULL;
+ }
- if (i < 10)
- goto error;
+ while ((dbsize > 0) && (dbsize >= CertList->SignatureListSize)) {
+ /* CertList out of bounds? */
+ if ((void *)(CertList + 1) > end
+ || CertList->SignatureListSize == 0) {
+ FreePool(list);
+ return NULL;
+ }
- if (v[i-1] == 'Z')
- gmt=1;
+ /* Omit the signature check here since we already did it
+ in count_keys() */
- for (i=0; i<10; i++)
- if ((v[i] > '9') || (v[i] < '0'))
- goto error;
+ Cert = (EFI_SIGNATURE_DATA *) (((UINT8 *) CertList) +
+ sizeof(EFI_SIGNATURE_LIST) +
+ CertList->SignatureHeaderSize);
+ /* Cert out of bounds? */
+ if ((void *)(Cert + 1) > end
+ || CertList->SignatureSize <= sizeof(EFI_GUID)) {
+ FreePool(list);
+ return NULL;
+ }
- y = (v[0]-'0')*10+(v[1]-'0');
+ list[count].Type = CertList->SignatureType;
+ if (CompareGuid (&CertList->SignatureType, &X509_GUID) == 0) {
+ list[count].MokSize = CertList->SignatureSize -
+ sizeof(EFI_GUID);
+ list[count].Mok = (void *)Cert->SignatureData;
+ } else {
+ list[count].MokSize = CertList->SignatureListSize -
+ sizeof(EFI_SIGNATURE_LIST);
+ list[count].Mok = (void *)Cert;
+ }
- if (y < 50)
- y+=100;
+ /* MOK out of bounds? */
+ if (list[count].MokSize > (unsigned long)end -
+ (unsigned long)list[count].Mok) {
+ FreePool(list);
+ return NULL;
+ }
- M = (v[2]-'0')*10+(v[3]-'0');
+ count++;
+ dbsize -= CertList->SignatureListSize;
+ CertList = (EFI_SIGNATURE_LIST *) ((UINT8 *) CertList +
+ CertList->SignatureListSize);
+ }
- if ((M > 12) || (M < 1))
- goto error;
+ return list;
+}
- d = (v[4]-'0')*10+(v[5]-'0');
- h = (v[6]-'0')*10+(v[7]-'0');
- m = (v[8]-'0')*10+(v[9]-'0');
+typedef struct {
+ int nid;
+ CHAR16 *name;
+} NidName;
+
+static NidName nidname[] = {
+ {NID_commonName, L"CN"},
+ {NID_organizationName, L"O"},
+ {NID_countryName, L"C"},
+ {NID_stateOrProvinceName, L"ST"},
+ {NID_localityName, L"L"},
+ {-1, NULL}
+};
- if (time->length >=12 &&
- (v[10] >= '0') && (v[10] <= '9') &&
- (v[11] >= '0') && (v[11] <= '9'))
- s = (v[10]-'0')*10+(v[11]-'0');
+static CHAR16 *get_x509_name(X509_NAME * X509Name)
+{
+ CHAR16 name[NAME_LINE_MAX + 1];
+ CHAR16 part[NAME_LINE_MAX + 1];
+ char str[NAME_LINE_MAX];
+ int i, len, rest, first;
+
+ name[0] = '\0';
+ rest = NAME_LINE_MAX;
+ first = 1;
+ for (i = 0; nidname[i].name != NULL; i++) {
+ int add;
+ len = X509_NAME_get_text_by_NID(X509Name, nidname[i].nid,
+ str, NAME_LINE_MAX);
+ if (len <= 0)
+ continue;
- SPrint(time_string, 0, L"%a %2d %02d:%02d:%02d %d%a",
- mon[M-1], d, h, m, s, y+1900, (gmt)?" GMT":"");
-error:
- return;
-}
+ if (first)
+ add = len + (int)StrLen(nidname[i].name) + 1;
+ else
+ add = len + (int)StrLen(nidname[i].name) + 3;
-static void print_x509_time (ASN1_TIME *time, CHAR16 *name)
-{
- CHAR16 time_string[30];
+ if (add > rest)
+ continue;
- if (time->type == V_ASN1_UTCTIME) {
- print_x509_UTCTIME_time(time, time_string);
- } else if (time->type == V_ASN1_GENERALIZEDTIME) {
- print_x509_GENERALIZEDTIME_time(time, time_string);
- } else {
- time_string[0] = '\0';
+ if (first) {
+ SPrint(part, NAME_LINE_MAX * sizeof(CHAR16), L"%s=%a",
+ nidname[i].name, str);
+ } else {
+ SPrint(part, NAME_LINE_MAX * sizeof(CHAR16), L", %s=%a",
+ nidname[i].name, str);
+ }
+ StrCat(name, part);
+ rest -= add;
+ first = 0;
}
- Print(L" %s:\n %s\n", name, time_string);
+ if (rest >= 0 && rest < NAME_LINE_MAX)
+ return PoolPrint(L"%s", name);
+
+ return NULL;
+}
+
+static CHAR16 *get_x509_time(ASN1_TIME * time)
+{
+ BIO *bio = BIO_new(BIO_s_mem());
+ char str[30];
+ int len;
+
+ ASN1_TIME_print(bio, time);
+ len = BIO_read(bio, str, 29);
+ if (len < 0)
+ len = 0;
+ str[len] = '\0';
+ BIO_free(bio);
+
+ return PoolPrint(L"%a", str);
}
-static void show_x509_info (X509 *X509Cert)
+static void show_x509_info(X509 * X509Cert, UINT8 * hash)
{
ASN1_INTEGER *serial;
BIGNUM *bnser;
unsigned char hexbuf[30];
X509_NAME *X509Name;
ASN1_TIME *time;
+ CHAR16 *issuer = NULL;
+ CHAR16 *subject = NULL;
+ CHAR16 *from = NULL;
+ CHAR16 *until = NULL;
+ EXTENDED_KEY_USAGE *extusage;
+ POOL_PRINT hash_string1;
+ POOL_PRINT hash_string2;
+ POOL_PRINT serial_string;
+ int fields = 0;
+ CHAR16 **text;
+ int i = 0;
+
+ ZeroMem(&hash_string1, sizeof(hash_string1));
+ ZeroMem(&hash_string2, sizeof(hash_string2));
+ ZeroMem(&serial_string, sizeof(serial_string));
serial = X509_get_serialNumber(X509Cert);
if (serial) {
int i, n;
bnser = ASN1_INTEGER_to_BN(serial, NULL);
n = BN_bn2bin(bnser, hexbuf);
- Print(L" Serial Number:\n ");
- for (i = 0; i < n-1; i++) {
- Print(L"%02x:", hexbuf[i]);
+ for (i = 0; i < n; i++) {
+ CatPrint(&serial_string, L"%02x:", hexbuf[i]);
}
- Print(L"%02x\n", hexbuf[n-1]);
}
+ if (serial_string.str)
+ fields++;
+
X509Name = X509_get_issuer_name(X509Cert);
if (X509Name) {
- print_x509_name(X509Name, L"Issuer");
+ issuer = get_x509_name(X509Name);
+ if (issuer)
+ fields++;
}
X509Name = X509_get_subject_name(X509Cert);
if (X509Name) {
- print_x509_name(X509Name, L"Subject");
+ subject = get_x509_name(X509Name);
+ if (subject)
+ fields++;
}
- time = X509_get_notBefore(X509Cert);
+ time = X509_getm_notBefore(X509Cert);
if (time) {
- print_x509_time(time, L"Validity from");
+ from = get_x509_time(time);
+ if (from)
+ fields++;
}
- time = X509_get_notAfter(X509Cert);
+ time = X509_getm_notAfter(X509Cert);
if (time) {
- print_x509_time(time, L"Validity till");
+ until = get_x509_time(time);
+ if (until)
+ fields++;
}
-}
-static void show_mok_info (void *Mok, UINTN MokSize)
-{
- EFI_STATUS efi_status;
- UINT8 hash[SHA1_DIGEST_SIZE];
- unsigned int i;
- X509 *X509Cert;
+ for (i = 0; i < 10; i++)
+ CatPrint(&hash_string1, L"%02x ", hash[i]);
+ for (i = 10; i < 20; i++)
+ CatPrint(&hash_string2, L"%02x ", hash[i]);
- if (!Mok || MokSize == 0)
+ if (hash_string1.str)
+ fields++;
+
+ if (hash_string2.str)
+ fields++;
+
+ if (!fields)
return;
- if (X509ConstructCertificate(Mok, MokSize, (UINT8 **) &X509Cert) &&
- X509Cert != NULL) {
- show_x509_info(X509Cert);
- X509_free(X509Cert);
+ i = 0;
+
+ extusage = X509_get_ext_d2i(X509Cert, NID_ext_key_usage, NULL, NULL);
+ text = AllocateZeroPool(sizeof(CHAR16 *) *
+ (fields * 3 +
+ sk_ASN1_OBJECT_num(extusage) + 3));
+ if (extusage) {
+ int j = 0;
+
+ text[i++] = StrDuplicate(L"[Extended Key Usage]");
+
+ for (j = 0; j < sk_ASN1_OBJECT_num(extusage); j++) {
+ POOL_PRINT extkeyusage;
+ ASN1_OBJECT *obj = sk_ASN1_OBJECT_value(extusage, j);
+ int buflen = 80;
+ char buf[buflen];
+
+ ZeroMem(&extkeyusage, sizeof(extkeyusage));
+
+ OBJ_obj2txt(buf, buflen, obj, 0);
+ CatPrint(&extkeyusage, L"OID: %a", buf);
+ text[i++] = StrDuplicate(extkeyusage.str);
+ FreePool(extkeyusage.str);
+ }
+ text[i++] = StrDuplicate(L"");
+ EXTENDED_KEY_USAGE_free(extusage);
+ }
+
+ if (serial_string.str) {
+ text[i++] = StrDuplicate(L"[Serial Number]");
+ text[i++] = serial_string.str;
+ text[i++] = StrDuplicate(L"");
+ }
+ if (issuer) {
+ text[i++] = StrDuplicate(L"[Issuer]");
+ text[i++] = issuer;
+ text[i++] = StrDuplicate(L"");
+ }
+ if (subject) {
+ text[i++] = StrDuplicate(L"[Subject]");
+ text[i++] = subject;
+ text[i++] = StrDuplicate(L"");
+ }
+ if (from) {
+ text[i++] = StrDuplicate(L"[Valid Not Before]");
+ text[i++] = from;
+ text[i++] = StrDuplicate(L"");
+ }
+ if (until) {
+ text[i++] = StrDuplicate(L"[Valid Not After]");
+ text[i++] = until;
+ text[i++] = StrDuplicate(L"");
+ }
+ if (hash_string1.str) {
+ text[i++] = StrDuplicate(L"[Fingerprint]");
+ text[i++] = hash_string1.str;
+ }
+ if (hash_string2.str) {
+ text[i++] = hash_string2.str;
+ text[i++] = StrDuplicate(L"");
+ }
+ text[i] = NULL;
+
+ console_print_box(text, -1);
+
+ for (i = 0; text[i] != NULL; i++)
+ FreePool(text[i]);
+
+ FreePool(text);
+}
+
+static void show_sha_digest(EFI_GUID Type, UINT8 * hash)
+{
+ CHAR16 *text[5];
+ POOL_PRINT hash_string1;
+ POOL_PRINT hash_string2;
+ int i;
+ int length;
+
+ if (CompareGuid(&Type, &EFI_CERT_SHA1_GUID) == 0) {
+ length = SHA1_DIGEST_SIZE;
+ text[0] = L"SHA1 hash";
+ } else if (CompareGuid(&Type, &EFI_CERT_SHA224_GUID) == 0) {
+ length = SHA224_DIGEST_LENGTH;
+ text[0] = L"SHA224 hash";
+ } else if (CompareGuid(&Type, &EFI_CERT_SHA256_GUID) == 0) {
+ length = SHA256_DIGEST_SIZE;
+ text[0] = L"SHA256 hash";
+ } else if (CompareGuid(&Type, &EFI_CERT_SHA384_GUID) == 0) {
+ length = SHA384_DIGEST_LENGTH;
+ text[0] = L"SHA384 hash";
+ } else if (CompareGuid(&Type, &EFI_CERT_SHA512_GUID) == 0) {
+ length = SHA512_DIGEST_LENGTH;
+ text[0] = L"SHA512 hash";
} else {
- Print(L" Not a valid X509 certificate: %x\n\n",
- ((UINT32 *)Mok)[0]);
return;
}
- efi_status = get_sha1sum(Mok, MokSize, hash);
+ ZeroMem(&hash_string1, sizeof(hash_string1));
+ ZeroMem(&hash_string2, sizeof(hash_string2));
+
+ text[1] = L"";
+
+ for (i = 0; i < length / 2; i++)
+ CatPrint(&hash_string1, L"%02x ", hash[i]);
+ for (i = length / 2; i < length; i++)
+ CatPrint(&hash_string2, L"%02x ", hash[i]);
+
+ text[2] = hash_string1.str;
+ text[3] = hash_string2.str;
+ text[4] = NULL;
+
+ console_print_box(text, -1);
+
+ if (hash_string1.str)
+ FreePool(hash_string1.str);
+
+ if (hash_string2.str)
+ FreePool(hash_string2.str);
+}
+
+static void show_efi_hash(EFI_GUID Type, void *Mok, UINTN MokSize)
+{
+ UINTN sig_size;
+ UINTN hash_num;
+ UINT8 *hash;
+ CHAR16 **menu_strings;
+ CHAR16 *selection[] = { L"[Hash List]", NULL };
+ UINTN key_num = 0;
+ UINTN i;
+
+ sig_size = sha_size(Type) + sizeof(EFI_GUID);
+ if ((MokSize % sig_size) != 0) {
+ console_errorbox(L"Corrupted Hash List");
+ return;
+ }
+ hash_num = MokSize / sig_size;
+
+ if (hash_num == 1) {
+ hash = (UINT8 *) Mok + sizeof(EFI_GUID);
+ show_sha_digest(Type, hash);
+ return;
+ }
- if (efi_status != EFI_SUCCESS) {
- Print(L"Failed to compute MOK fingerprint\n");
+ menu_strings = AllocateZeroPool(sizeof(CHAR16 *) * (hash_num + 2));
+ if (!menu_strings) {
+ console_errorbox(L"Out of Resources");
return;
}
- Print(L" Fingerprint (SHA1):\n ");
- for (i = 0; i < SHA1_DIGEST_SIZE; i++) {
- Print(L" %02x", hash[i]);
- if (i % 10 == 9)
- Print(L"\n ");
+ for (i = 0; i < hash_num; i++) {
+ menu_strings[i] = PoolPrint(L"View hash %d", i);
}
- Print(L"\n");
-}
+ menu_strings[i] = StrDuplicate(L"Back");
+ menu_strings[i + 1] = NULL;
-static INTN get_number ()
-{
- EFI_INPUT_KEY input_key;
- CHAR16 input[10];
- int count = 0;
+ while (key_num < hash_num) {
+ int rc;
- do {
- input_key = get_keystroke();
+ key_num = rc = console_select(selection, menu_strings, key_num);
+ if (rc < 0 || key_num >= hash_num)
+ break;
- if ((input_key.UnicodeChar < '0' ||
- input_key.UnicodeChar > '9' ||
- count >= 10) &&
- input_key.UnicodeChar != CHAR_BACKSPACE) {
- continue;
- }
+ hash = (UINT8 *) Mok + sig_size * key_num + sizeof(EFI_GUID);
+ show_sha_digest(Type, hash);
+ }
- if (count == 0 && input_key.UnicodeChar == CHAR_BACKSPACE)
- continue;
+ for (i = 0; menu_strings[i] != NULL; i++)
+ FreePool(menu_strings[i]);
- Print(L"%c", input_key.UnicodeChar);
+ FreePool(menu_strings);
+}
- if (input_key.UnicodeChar == CHAR_BACKSPACE) {
- input[--count] = '\0';
- continue;
- }
+static void show_mok_info(EFI_GUID Type, void *Mok, UINTN MokSize)
+{
+ EFI_STATUS efi_status;
- input[count++] = input_key.UnicodeChar;
- } while (input_key.UnicodeChar != CHAR_CARRIAGE_RETURN);
+ if (!Mok || MokSize == 0)
+ return;
- if (count == 0)
- return -1;
+ if (CompareGuid (&Type, &X509_GUID) == 0) {
+ UINT8 hash[SHA1_DIGEST_SIZE];
+ X509 *X509Cert;
- input[count] = '\0';
+ efi_status = get_sha1sum(Mok, MokSize, hash);
+ if (EFI_ERROR(efi_status)) {
+ console_notify(L"Failed to compute MOK fingerprint");
+ return;
+ }
- return (INTN)Atoi(input);
+ if (X509ConstructCertificate(Mok, MokSize,
+ (UINT8 **) & X509Cert)
+ && X509Cert != NULL) {
+ show_x509_info(X509Cert, hash);
+ X509_free(X509Cert);
+ } else {
+ console_notify(L"Not a valid X509 certificate");
+ return;
+ }
+ } else if (is_sha2_hash(Type)) {
+ show_efi_hash(Type, Mok, MokSize);
+ }
}
-static UINT8 list_keys (void *MokNew, UINTN MokNewSize)
+static EFI_STATUS list_keys(void *KeyList, UINTN KeyListSize, CHAR16 * title)
{
- UINT32 MokNum;
+ UINTN MokNum = 0;
MokListNode *keys = NULL;
- INTN key_num = 0;
- UINT8 initial = 1;
+ UINT32 key_num = 0;
+ CHAR16 **menu_strings;
+ CHAR16 *selection[] = { title, NULL };
+ unsigned int i;
- CopyMem(&MokNum, MokNew, sizeof(UINT32));
- if (MokNum == 0) {
- Print(L"No key exists\n");
- return 0;
+ if (KeyListSize < (sizeof(EFI_SIGNATURE_LIST) +
+ sizeof(EFI_SIGNATURE_DATA))) {
+ console_notify(L"No MOK keys found");
+ return EFI_NOT_FOUND;
}
- keys = build_mok_list(MokNum,
- (void *)MokNew + sizeof(UINT32),
- MokNewSize - sizeof(UINT32));
-
+ MokNum = count_keys(KeyList, KeyListSize);
+ if (MokNum == 0) {
+ console_errorbox(L"Invalid key list");
+ return EFI_ABORTED;
+ }
+ keys = build_mok_list(MokNum, KeyList, KeyListSize);
if (!keys) {
- Print(L"Failed to construct key list in MokNew\n");
- return 0;
+ console_errorbox(L"Failed to construct key list");
+ return EFI_ABORTED;
}
- do {
- uefi_call_wrapper(ST->ConOut->ClearScreen, 1, ST->ConOut);
- Print(L"Input the key number to show the details of the key or\n"
- L"type \'0\' to continue\n\n");
- Print(L"%d key(s) in the new key list\n\n", MokNum);
-
- if (key_num > MokNum) {
- Print(L"[Key %d]\n", key_num);
- Print(L"No such key\n\n");
- } else if (initial != 1 && key_num > 0){
- Print(L"[Key %d]\n", key_num);
- show_mok_info(keys[key_num-1].Mok, keys[key_num-1].MokSize);
- }
+ menu_strings = AllocateZeroPool(sizeof(CHAR16 *) * (MokNum + 2));
+ if (!menu_strings)
+ return EFI_OUT_OF_RESOURCES;
- Print(L"Key Number: ");
+ for (i = 0; i < MokNum; i++) {
+ menu_strings[i] = PoolPrint(L"View key %d", i);
+ }
+ menu_strings[i] = StrDuplicate(L"Continue");
- key_num = get_number();
+ menu_strings[i + 1] = NULL;
- Print(L"\n\n");
+ while (key_num < MokNum) {
+ int rc;
+ rc = key_num = console_select(selection, menu_strings, key_num);
- if (key_num == -1)
- continue;
+ if (rc < 0 || key_num >= MokNum)
+ break;
- initial = 0;
- } while (key_num != 0);
+ show_mok_info(keys[key_num].Type, keys[key_num].Mok,
+ keys[key_num].MokSize);
+ }
+ for (i = 0; menu_strings[i] != NULL; i++)
+ FreePool(menu_strings[i]);
+ FreePool(menu_strings);
FreePool(keys);
- return 1;
+ return EFI_SUCCESS;
}
-static UINT8 get_line (UINT32 *length, CHAR16 *line, UINT32 line_max, UINT8 show)
+static EFI_STATUS get_line(UINT32 * length, CHAR16 * line, UINT32 line_max,
+ UINT8 show)
{
EFI_INPUT_KEY key;
- int count = 0;
+ EFI_STATUS efi_status;
+ unsigned int count = 0;
do {
- key = get_keystroke();
+ efi_status = console_get_keystroke(&key);
+ if (EFI_ERROR(efi_status)) {
+ console_error(L"Failed to read the keystroke",
+ efi_status);
+ *length = 0;
+ return efi_status;
+ }
if ((count >= line_max &&
key.UnicodeChar != CHAR_BACKSPACE) ||
key.UnicodeChar == CHAR_NULL ||
- key.UnicodeChar == CHAR_TAB ||
+ key.UnicodeChar == CHAR_TAB ||
key.UnicodeChar == CHAR_LINEFEED ||
key.UnicodeChar == CHAR_CARRIAGE_RETURN) {
continue;
continue;
} else if (key.UnicodeChar == CHAR_BACKSPACE) {
if (show) {
- Print(L"\b");
+ console_print(L"\b");
}
line[--count] = '\0';
continue;
}
if (show) {
- Print(L"%c", key.UnicodeChar);
+ console_print(L"%c", key.UnicodeChar);
}
line[count++] = key.UnicodeChar;
} while (key.UnicodeChar != CHAR_CARRIAGE_RETURN);
- Print(L"\n");
+ console_print(L"\n");
*length = count;
- return 1;
+ return EFI_SUCCESS;
}
-static EFI_STATUS compute_pw_hash (void *MokNew, UINTN MokNewSize, CHAR16 *password,
- UINT32 pw_length, UINT8 *hash)
+static EFI_STATUS compute_pw_hash(void *Data, UINTN DataSize, UINT8 * password,
+ UINT32 pw_length, UINT8 * hash)
{
- EFI_STATUS status;
+ EFI_STATUS efi_status;
unsigned int ctxsize;
void *ctx = NULL;
ctxsize = Sha256GetContextSize();
ctx = AllocatePool(ctxsize);
-
if (!ctx) {
- Print(L"Unable to allocate memory for hash context\n");
+ console_notify(L"Unable to allocate memory for hash context");
return EFI_OUT_OF_RESOURCES;
}
if (!Sha256Init(ctx)) {
- Print(L"Unable to initialise hash\n");
- status = EFI_OUT_OF_RESOURCES;
+ console_notify(L"Unable to initialise hash");
+ efi_status = EFI_OUT_OF_RESOURCES;
goto done;
}
- if (!(Sha256Update(ctx, MokNew, MokNewSize))) {
- Print(L"Unable to generate hash\n");
- status = EFI_OUT_OF_RESOURCES;
- goto done;
+ if (Data && DataSize) {
+ if (!(Sha256Update(ctx, Data, DataSize))) {
+ console_notify(L"Unable to generate hash");
+ efi_status = EFI_OUT_OF_RESOURCES;
+ goto done;
+ }
}
- if (!(Sha256Update(ctx, password, pw_length * sizeof(CHAR16)))) {
- Print(L"Unable to generate hash\n");
- status = EFI_OUT_OF_RESOURCES;
+ if (!(Sha256Update(ctx, password, pw_length))) {
+ console_notify(L"Unable to generate hash");
+ efi_status = EFI_OUT_OF_RESOURCES;
goto done;
}
if (!(Sha256Final(ctx, hash))) {
- Print(L"Unable to finalise hash\n");
- status = EFI_OUT_OF_RESOURCES;
+ console_notify(L"Unable to finalise hash");
+ efi_status = EFI_OUT_OF_RESOURCES;
goto done;
}
- status = EFI_SUCCESS;
+ efi_status = EFI_SUCCESS;
done:
- return status;
+ return efi_status;
+}
+
+static void console_save_and_set_mode(SIMPLE_TEXT_OUTPUT_MODE * SavedMode)
+{
+ SIMPLE_TEXT_OUTPUT_INTERFACE *co = ST->ConOut;
+
+ if (!SavedMode) {
+ console_print(L"Invalid parameter: SavedMode\n");
+ return;
+ }
+
+ CopyMem(SavedMode, co->Mode, sizeof(SIMPLE_TEXT_OUTPUT_MODE));
+ co->EnableCursor(co, FALSE);
+ co->SetAttribute(co, EFI_LIGHTGRAY | EFI_BACKGROUND_BLUE);
+}
+
+static void console_restore_mode(SIMPLE_TEXT_OUTPUT_MODE * SavedMode)
+{
+ SIMPLE_TEXT_OUTPUT_INTERFACE *co = ST->ConOut;
+
+ co->EnableCursor(co, SavedMode->CursorVisible);
+ co->SetCursorPosition(co, SavedMode->CursorColumn,
+ SavedMode->CursorRow);
+ co->SetAttribute(co, SavedMode->Attribute);
+}
+
+static INTN reset_system()
+{
+ gRT->ResetSystem(EfiResetWarm, EFI_SUCCESS, 0, NULL);
+ console_notify(L"Failed to reboot\n");
+ return -1;
+}
+
+static UINT32 get_password(CHAR16 * prompt, CHAR16 * password, UINT32 max)
+{
+ SIMPLE_TEXT_OUTPUT_MODE SavedMode;
+ CHAR16 *str;
+ CHAR16 *message[2];
+ UINTN length;
+ UINT32 pw_length;
+
+ if (!prompt)
+ prompt = L"Password:";
+
+ console_save_and_set_mode(&SavedMode);
+
+ str = PoolPrint(L"%s ", prompt);
+ if (!str) {
+ console_errorbox(L"Failed to allocate prompt");
+ return 0;
+ }
+
+ message[0] = str;
+ message[1] = NULL;
+ length = StrLen(message[0]);
+ console_print_box_at(message, -1, -length - 4, -5, length + 4, 3, 0, 1);
+ get_line(&pw_length, password, max, 0);
+
+ console_restore_mode(&SavedMode);
+
+ FreePool(str);
+
+ return pw_length;
}
-static EFI_STATUS store_keys (void *MokNew, UINTN MokNewSize)
+static EFI_STATUS match_password(PASSWORD_CRYPT * pw_crypt,
+ void *Data, UINTN DataSize,
+ UINT8 * auth, CHAR16 * prompt)
{
- EFI_GUID shim_lock_guid = SHIM_LOCK_GUID;
EFI_STATUS efi_status;
- UINT8 hash[SHA256_DIGEST_SIZE];
- UINT8 auth[SHA256_DIGEST_SIZE];
- UINTN auth_size;
- UINT32 attributes;
+ UINT8 hash[128];
+ UINT8 *auth_hash;
+ UINT32 auth_size;
CHAR16 password[PASSWORD_MAX];
UINT32 pw_length;
UINT8 fail_count = 0;
+ unsigned int i;
- auth_size = SHA256_DIGEST_SIZE;
- efi_status = uefi_call_wrapper(RT->GetVariable, 5, L"MokAuth",
- &shim_lock_guid,
- &attributes, &auth_size, auth);
-
-
- if (efi_status != EFI_SUCCESS || auth_size != SHA256_DIGEST_SIZE) {
- Print(L"Failed to get MokAuth %d\n", efi_status);
- return efi_status;
+ if (pw_crypt) {
+ auth_hash = pw_crypt->hash;
+ auth_size = get_hash_size(pw_crypt->method);
+ if (auth_size == 0)
+ return EFI_INVALID_PARAMETER;
+ } else if (auth) {
+ auth_hash = auth;
+ auth_size = SHA256_DIGEST_SIZE;
+ } else {
+ return EFI_INVALID_PARAMETER;
}
while (fail_count < 3) {
- Print(L"Password(%d-%d characters): ",
- PASSWORD_MIN, PASSWORD_MAX);
- get_line(&pw_length, password, PASSWORD_MAX, 0);
+ pw_length = get_password(prompt, password, PASSWORD_MAX);
- if (pw_length < 8) {
- Print(L"At least %d characters for the password\n",
- PASSWORD_MIN);
+ if (pw_length < PASSWORD_MIN || pw_length > PASSWORD_MAX) {
+ console_errorbox(L"Invalid password length");
+ fail_count++;
+ continue;
}
- efi_status = compute_pw_hash(MokNew, MokNewSize, password,
- pw_length, hash);
-
- if (efi_status != EFI_SUCCESS) {
- return efi_status;
+ /*
+ * Compute password hash
+ */
+ if (pw_crypt) {
+ char pw_ascii[PASSWORD_MAX + 1];
+ for (i = 0; i < pw_length; i++)
+ pw_ascii[i] = (char)password[i];
+ pw_ascii[pw_length] = '\0';
+
+ efi_status = password_crypt(pw_ascii, pw_length,
+ pw_crypt, hash);
+ } else {
+ /*
+ * For backward compatibility
+ */
+ efi_status = compute_pw_hash(Data, DataSize,
+ (UINT8 *) password,
+ pw_length * sizeof(CHAR16),
+ hash);
+ }
+ if (EFI_ERROR(efi_status)) {
+ console_errorbox(L"Unable to generate password hash");
+ fail_count++;
+ continue;
}
- if (CompareMem(auth, hash, SHA256_DIGEST_SIZE) != 0) {
- Print(L"Password doesn't match\n");
+ if (CompareMem(auth_hash, hash, auth_size) != 0) {
+ console_errorbox(L"Password doesn't match");
fail_count++;
- } else {
- break;
+ continue;
}
+
+ break;
}
if (fail_count >= 3)
return EFI_ACCESS_DENIED;
- /* Write new MOK */
- efi_status = uefi_call_wrapper(RT->SetVariable, 5, L"MokList",
- &shim_lock_guid,
- EFI_VARIABLE_NON_VOLATILE
- | EFI_VARIABLE_BOOTSERVICE_ACCESS,
- MokNewSize, MokNew);
- if (efi_status != EFI_SUCCESS) {
- Print(L"Failed to set variable %d\n", efi_status);
- return efi_status;
- }
-
return EFI_SUCCESS;
}
-static UINTN mok_enrollment_prompt (void *MokNew, void *data2) {
- CHAR16 line[1];
- UINT32 length;
- UINTN MokNewSize = (UINTN)data2;
+static EFI_STATUS write_db(CHAR16 * db_name, void *MokNew, UINTN MokNewSize)
+{
EFI_STATUS efi_status;
+ UINT32 attributes;
+ void *old_data = NULL;
+ void *new_data = NULL;
+ UINTN old_size;
+ UINTN new_size;
+
+ /* Do not use EFI_VARIABLE_APPEND_WRITE due to faulty firmwares.
+ * ref: https://github.com/rhboot/shim/issues/55
+ * https://github.com/rhboot/shim/issues/105 */
+
+ efi_status = get_variable_attr(db_name, (UINT8 **)&old_data, &old_size,
+ SHIM_LOCK_GUID, &attributes);
+ if (EFI_ERROR(efi_status) && efi_status != EFI_NOT_FOUND) {
+ return efi_status;
+ }
- do {
- if (!list_keys(MokNew, MokNewSize)) {
- return 0;
- }
+ /* Check if the old db is compromised or not */
+ if (attributes & EFI_VARIABLE_RUNTIME_ACCESS) {
+ FreePool(old_data);
+ old_data = NULL;
+ old_size = 0;
+ }
+
+ new_size = old_size + MokNewSize;
+ new_data = AllocatePool(new_size);
+ if (new_data == NULL) {
+ efi_status = EFI_OUT_OF_RESOURCES;
+ goto out;
+ }
- Print(L"Enroll the key(s)? (y/n): ");
+ CopyMem(new_data, old_data, old_size);
+ CopyMem(new_data + old_size, MokNew, MokNewSize);
- get_line (&length, line, 1, 1);
+ efi_status = gRT->SetVariable(db_name, &SHIM_LOCK_GUID,
+ EFI_VARIABLE_NON_VOLATILE |
+ EFI_VARIABLE_BOOTSERVICE_ACCESS,
+ new_size, new_data);
+out:
+ if (old_size > 0) {
+ FreePool(old_data);
+ }
- if (line[0] == 'Y' || line[0] == 'y') {
- efi_status = store_keys(MokNew, MokNewSize);
+ if (new_data != NULL) {
+ FreePool(new_data);
+ }
- if (efi_status != EFI_SUCCESS) {
- Print(L"Failed to enroll keys\n");
- return -1;
- }
- return 0;
- }
- } while (line[0] != 'N' && line[0] != 'n');
- return -1;
+ return efi_status;
}
-static UINTN mok_deletion_prompt (void *MokNew, void *data2) {
- CHAR16 line[1];
- UINT32 length;
+static EFI_STATUS store_keys(void *MokNew, UINTN MokNewSize, int authenticate,
+ BOOLEAN MokX)
+{
EFI_STATUS efi_status;
+ CHAR16 *db_name;
+ CHAR16 *auth_name;
+ UINT8 auth[PASSWORD_CRYPT_SIZE];
+ UINTN auth_size = PASSWORD_CRYPT_SIZE;
+ UINT32 attributes;
- Print(L"Erase all stored keys? (y/N): ");
-
- get_line (&length, line, 1, 1);
+ if (MokX) {
+ db_name = L"MokListX";
+ auth_name = L"MokXAuth";
+ } else {
+ db_name = L"MokList";
+ auth_name = L"MokAuth";
+ }
- if (line[0] == 'Y' || line[0] == 'y') {
- efi_status = store_keys(MokNew, sizeof(UINT32));
+ if (authenticate) {
+ efi_status = gRT->GetVariable(auth_name, &SHIM_LOCK_GUID,
+ &attributes, &auth_size, auth);
+ if (EFI_ERROR(efi_status) ||
+ (auth_size != SHA256_DIGEST_SIZE &&
+ auth_size != PASSWORD_CRYPT_SIZE)) {
+ if (MokX)
+ console_error(L"Failed to get MokXAuth",
+ efi_status);
+ else
+ console_error(L"Failed to get MokAuth",
+ efi_status);
+ return efi_status;
+ }
- if (efi_status != EFI_SUCCESS) {
- Print(L"Failed to erase keys\n");
- return -1;
+ if (auth_size == PASSWORD_CRYPT_SIZE) {
+ efi_status = match_password((PASSWORD_CRYPT *) auth,
+ NULL, 0, NULL, NULL);
+ } else {
+ efi_status = match_password(NULL, MokNew, MokNewSize,
+ auth, NULL);
}
+ if (EFI_ERROR(efi_status))
+ return EFI_ACCESS_DENIED;
}
- return 0;
+ if (!MokNewSize) {
+ /* Delete MOK */
+ efi_status = gRT->SetVariable(db_name, &SHIM_LOCK_GUID,
+ EFI_VARIABLE_NON_VOLATILE |
+ EFI_VARIABLE_BOOTSERVICE_ACCESS,
+ 0, NULL);
+ } else {
+ /* Write new MOK */
+ efi_status = write_db(db_name, MokNew, MokNewSize);
+ }
+
+ if (EFI_ERROR(efi_status)) {
+ console_error(L"Failed to set variable", efi_status);
+ return efi_status;
+ }
+
+ return EFI_SUCCESS;
}
-static void draw_menu (struct menu_item *items, UINTN count) {
- UINTN i;
+static EFI_STATUS mok_enrollment_prompt(void *MokNew, UINTN MokNewSize,
+ int auth, BOOLEAN MokX)
+{
+ EFI_STATUS efi_status;
+ CHAR16 *enroll_p[] = { L"Enroll the key(s)?", NULL };
+ CHAR16 *title;
+
+ if (MokX)
+ title = L"[Enroll MOKX]";
+ else
+ title = L"[Enroll MOK]";
- uefi_call_wrapper(ST->ConOut->ClearScreen, 1, ST->ConOut);
+ efi_status = list_keys(MokNew, MokNewSize, title);
+ if (EFI_ERROR(efi_status))
+ return efi_status;
+
+ if (console_yes_no(enroll_p) == 0)
+ return EFI_ABORTED;
- for (i = 0; i < count; i++) {
- uefi_call_wrapper(ST->ConOut->SetAttribute, 2, ST->ConOut,
- items[i].colour | EFI_BACKGROUND_BLACK);
- Print(L" %s\n", items[i].text);
+ efi_status = store_keys(MokNew, MokNewSize, auth, MokX);
+ if (EFI_ERROR(efi_status)) {
+ console_notify(L"Failed to enroll keys\n");
+ return efi_status;
+ }
+
+ if (auth) {
+ if (MokX) {
+ LibDeleteVariable(L"MokXNew", &SHIM_LOCK_GUID);
+ LibDeleteVariable(L"MokXAuth", &SHIM_LOCK_GUID);
+ } else {
+ LibDeleteVariable(L"MokNew", &SHIM_LOCK_GUID);
+ LibDeleteVariable(L"MokAuth", &SHIM_LOCK_GUID);
+ }
}
- uefi_call_wrapper(ST->ConOut->SetCursorPosition, 3, ST->ConOut, 0, 0);
- uefi_call_wrapper(ST->ConOut->EnableCursor, 2, ST->ConOut, TRUE);
+ return EFI_SUCCESS;
}
-static void free_menu (struct menu_item *items, UINTN count) {
- UINTN i;
+static EFI_STATUS mok_reset_prompt(BOOLEAN MokX)
+{
+ EFI_STATUS efi_status;
+ CHAR16 *prompt[] = { NULL, NULL };
+
+ ST->ConOut->ClearScreen(ST->ConOut);
-#if 0
- for (i=0; i<count; i++) {
- if (items[i].text)
- FreePool(items[i].text);
+ if (MokX)
+ prompt[0] = L"Erase all stored keys in MokListX?";
+ else
+ prompt[0] = L"Erase all stored keys in MokList?";
+
+ if (console_yes_no(prompt) == 0)
+ return EFI_ABORTED;
+
+ efi_status = store_keys(NULL, 0, TRUE, MokX);
+ if (EFI_ERROR(efi_status)) {
+ console_notify(L"Failed to erase keys\n");
+ return efi_status;
}
- FreePool(items);
-#endif
+ if (MokX) {
+ LibDeleteVariable(L"MokXNew", &SHIM_LOCK_GUID);
+ LibDeleteVariable(L"MokXAuth", &SHIM_LOCK_GUID);
+ } else {
+ LibDeleteVariable(L"MokNew", &SHIM_LOCK_GUID);
+ LibDeleteVariable(L"MokAuth", &SHIM_LOCK_GUID);
+ }
+
+ return EFI_SUCCESS;
}
-static void run_menu (struct menu_item *items, UINTN count) {
- UINTN index, pos = 0;
- EFI_INPUT_KEY key;
+static EFI_STATUS write_back_mok_list(MokListNode * list, INTN key_num,
+ BOOLEAN MokX)
+{
+ EFI_STATUS efi_status;
+ EFI_SIGNATURE_LIST *CertList;
+ EFI_SIGNATURE_DATA *CertData;
+ void *Data = NULL, *ptr;
+ INTN DataSize = 0;
+ int i;
+ CHAR16 *db_name;
- draw_menu (items, count);
+ if (MokX)
+ db_name = L"MokListX";
+ else
+ db_name = L"MokList";
- while (1) {
- uefi_call_wrapper(ST->ConOut->SetCursorPosition, 3, ST->ConOut,
- 0, pos);
- uefi_call_wrapper(BS->WaitForEvent, 3, 1,
- &ST->ConIn->WaitForKey, &index);
- uefi_call_wrapper(ST->ConIn->ReadKeyStroke, 2, ST->ConIn,
- &key);
-
- switch(key.ScanCode) {
- case SCAN_UP:
- if (pos == 0)
- continue;
- pos--;
+ for (i = 0; i < key_num; i++) {
+ if (list[i].Mok == NULL)
continue;
- break;
- case SCAN_DOWN:
- if (pos == (count - 1))
- continue;
- pos++;
+
+ DataSize += sizeof(EFI_SIGNATURE_LIST);
+ if (CompareGuid(&(list[i].Type), &X509_GUID) == 0)
+ DataSize += sizeof(EFI_GUID);
+ DataSize += list[i].MokSize;
+ }
+
+ Data = AllocatePool(DataSize);
+ if (Data == NULL && DataSize != 0)
+ return EFI_OUT_OF_RESOURCES;
+
+ ptr = Data;
+
+ for (i = 0; i < key_num; i++) {
+ if (list[i].Mok == NULL)
continue;
- break;
- }
- switch(key.UnicodeChar) {
- case CHAR_LINEFEED:
- case CHAR_CARRIAGE_RETURN:
- if (items[pos].callback == NULL) {
- free_menu(items, count);
- return;
- }
+ CertList = (EFI_SIGNATURE_LIST *) ptr;
+ CertData = (EFI_SIGNATURE_DATA *) (((uint8_t *) ptr) +
+ sizeof(EFI_SIGNATURE_LIST));
- items[pos].callback(items[pos].data, items[pos].data2);
- draw_menu (items, count);
- pos = 0;
- break;
+ CertList->SignatureType = list[i].Type;
+ CertList->SignatureHeaderSize = 0;
+
+ if (CompareGuid(&(list[i].Type), &X509_GUID) == 0) {
+ CertList->SignatureListSize = list[i].MokSize +
+ sizeof(EFI_SIGNATURE_LIST) + sizeof(EFI_GUID);
+ CertList->SignatureSize =
+ list[i].MokSize + sizeof(EFI_GUID);
+
+ CertData->SignatureOwner = SHIM_LOCK_GUID;
+ CopyMem(CertData->SignatureData, list[i].Mok,
+ list[i].MokSize);
+ } else {
+ CertList->SignatureListSize = list[i].MokSize +
+ sizeof(EFI_SIGNATURE_LIST);
+ CertList->SignatureSize =
+ sha_size(list[i].Type) + sizeof(EFI_GUID);
+
+ CopyMem(CertData, list[i].Mok, list[i].MokSize);
}
+ ptr = (uint8_t *) ptr + CertList->SignatureListSize;
}
+
+ efi_status = gRT->SetVariable(db_name, &SHIM_LOCK_GUID,
+ EFI_VARIABLE_NON_VOLATILE |
+ EFI_VARIABLE_BOOTSERVICE_ACCESS,
+ DataSize, Data);
+ if (Data)
+ FreePool(Data);
+
+ if (EFI_ERROR(efi_status)) {
+ console_error(L"Failed to set variable", efi_status);
+ return efi_status;
+ }
+
+ return EFI_SUCCESS;
}
-static UINTN file_callback (void *data, void *data2) {
- EFI_FILE_INFO *buffer = NULL;
- UINTN buffersize = 0, readsize;
- EFI_STATUS status;
- EFI_FILE *file;
- CHAR16 *filename = data;
- EFI_FILE *parent = data2;
- EFI_GUID file_info_guid = EFI_FILE_INFO_ID;
- void *mokbuffer = NULL;
- void *filebuffer;
+static void delete_cert(void *key, UINT32 key_size,
+ MokListNode * mok, INTN mok_num)
+{
+ int i;
- status = uefi_call_wrapper(parent->Open, 5, parent, &file, filename,
- EFI_FILE_MODE_READ, 0);
+ for (i = 0; i < mok_num; i++) {
+ if (CompareGuid(&(mok[i].Type), &X509_GUID) != 0)
+ continue;
- if (status != EFI_SUCCESS)
- return 1;
+ if (mok[i].MokSize == key_size &&
+ CompareMem(key, mok[i].Mok, key_size) == 0) {
+ /* Remove the key */
+ mok[i].Mok = NULL;
+ mok[i].MokSize = 0;
+ }
+ }
+}
- status = uefi_call_wrapper(file->GetInfo, 4, file, &file_info_guid,
- &buffersize, buffer);
+static int match_hash(UINT8 * hash, UINT32 hash_size, int start,
+ void *hash_list, UINT32 list_num)
+{
+ UINT8 *ptr;
+ UINTN i;
- if (status == EFI_BUFFER_TOO_SMALL) {
- buffer = AllocatePool(buffersize);
- status = uefi_call_wrapper(file->GetInfo, 4, file,
- &file_info_guid, &buffersize,
- buffer);
+ ptr = hash_list + sizeof(EFI_GUID);
+ for (i = start; i < list_num; i++) {
+ if (CompareMem(hash, ptr, hash_size) == 0)
+ return i;
+ ptr += hash_size + sizeof(EFI_GUID);
}
- if (!buffer)
- return 0;
+ return -1;
+}
- readsize = buffer->FileSize;
+static void mem_move(void *dest, void *src, UINTN size)
+{
+ UINT8 *d, *s;
+ UINTN i;
- mokbuffer = AllocateZeroPool(readsize + (2 * sizeof(UINT32)));
- if (!mokbuffer)
- goto out;
+ d = (UINT8 *) dest;
+ s = (UINT8 *) src;
+ for (i = 0; i < size; i++)
+ d[i] = s[i];
+}
- ((UINT32 *)mokbuffer)[0] = 1;
- ((UINT32 *)mokbuffer)[1] = readsize;
- filebuffer = (UINT32 *)mokbuffer + 2;
+static void delete_hash_in_list(EFI_GUID Type, UINT8 * hash, UINT32 hash_size,
+ MokListNode * mok, INTN mok_num)
+{
+ UINT32 sig_size;
+ UINT32 list_num;
+ int i, del_ind;
+ void *start, *end;
+ UINT32 remain;
- status = uefi_call_wrapper(file->Read, 3, file, &readsize, filebuffer);
+ sig_size = hash_size + sizeof(EFI_GUID);
- if (status != EFI_SUCCESS)
- goto out;
+ for (i = 0; i < mok_num; i++) {
+ if ((CompareGuid(&(mok[i].Type), &Type) != 0) ||
+ (mok[i].MokSize < sig_size))
+ continue;
- mok_enrollment_prompt(mokbuffer,
- (void *)buffer->FileSize + (2 * sizeof(UINT32)));
-out:
- if (buffer)
- FreePool(buffer);
+ list_num = mok[i].MokSize / sig_size;
- if (mokbuffer)
- FreePool(mokbuffer);
+ del_ind = match_hash(hash, hash_size, 0, mok[i].Mok, list_num);
+ while (del_ind >= 0) {
+ /* Remove the hash */
+ if (sig_size == mok[i].MokSize) {
+ mok[i].Mok = NULL;
+ mok[i].MokSize = 0;
+ break;
+ }
- return 0;
+ start = mok[i].Mok + del_ind * sig_size;
+ end = start + sig_size;
+ remain = mok[i].MokSize - (del_ind + 1) * sig_size;
+
+ mem_move(start, end, remain);
+ mok[i].MokSize -= sig_size;
+ list_num--;
+
+ del_ind = match_hash(hash, hash_size, del_ind,
+ mok[i].Mok, list_num);
+ }
+ }
}
-static UINTN directory_callback (void *data, void *data2) {
- EFI_FILE_INFO *buffer = NULL;
- UINTN buffersize = 0;
- EFI_STATUS status;
- UINTN dircount = 0, i = 0;
- struct menu_item *dircontent;
- EFI_FILE *dir;
- CHAR16 *filename = data;
- EFI_FILE *root = data2;
+static void delete_hash_list(EFI_GUID Type, void *hash_list, UINT32 list_size,
+ MokListNode * mok, INTN mok_num)
+{
+ UINT32 hash_size;
+ UINT32 hash_num;
+ UINT32 sig_size;
+ UINT8 *hash;
+ UINT32 i;
+
+ hash_size = sha_size(Type);
+ sig_size = hash_size + sizeof(EFI_GUID);
+ if (list_size < sig_size)
+ return;
- status = uefi_call_wrapper(root->Open, 5, root, &dir, filename,
- EFI_FILE_MODE_READ, 0);
+ hash_num = list_size / sig_size;
- if (status != EFI_SUCCESS)
- return 1;
+ hash = hash_list + sizeof(EFI_GUID);
- while (1) {
- status = uefi_call_wrapper(dir->Read, 3, dir, &buffersize,
- buffer);
+ for (i = 0; i < hash_num; i++) {
+ delete_hash_in_list(Type, hash, hash_size, mok, mok_num);
+ hash += sig_size;
+ }
+}
+
+static EFI_STATUS delete_keys(void *MokDel, UINTN MokDelSize, BOOLEAN MokX)
+{
+ EFI_STATUS efi_status;
+ CHAR16 *db_name;
+ CHAR16 *auth_name;
+ CHAR16 *err_strs[] = { NULL, NULL, NULL };
+ UINT8 auth[PASSWORD_CRYPT_SIZE];
+ UINTN auth_size = PASSWORD_CRYPT_SIZE;
+ UINT32 attributes;
+ UINT8 *MokListData = NULL;
+ UINTN MokListDataSize = 0;
+ MokListNode *mok = NULL, *del_key = NULL;
+ INTN mok_num, del_num;
+ int i;
+
+ if (MokX) {
+ db_name = L"MokListX";
+ auth_name = L"MokXDelAuth";
+ } else {
+ db_name = L"MokList";
+ auth_name = L"MokDelAuth";
+ }
- if (status == EFI_BUFFER_TOO_SMALL) {
- buffer = AllocatePool(buffersize);
- status = uefi_call_wrapper(dir->Read, 3, dir,
- &buffersize, buffer);
+ efi_status = gRT->GetVariable(auth_name, &SHIM_LOCK_GUID, &attributes,
+ &auth_size, auth);
+ if (EFI_ERROR(efi_status) ||
+ (auth_size != SHA256_DIGEST_SIZE
+ && auth_size != PASSWORD_CRYPT_SIZE)) {
+ if (MokX)
+ console_error(L"Failed to get MokXDelAuth", efi_status);
+ else
+ console_error(L"Failed to get MokDelAuth", efi_status);
+ return efi_status;
+ }
+
+ if (auth_size == PASSWORD_CRYPT_SIZE) {
+ efi_status = match_password((PASSWORD_CRYPT *) auth, NULL, 0,
+ NULL, NULL);
+ } else {
+ efi_status =
+ match_password(NULL, MokDel, MokDelSize, auth, NULL);
+ }
+ if (EFI_ERROR(efi_status))
+ return EFI_ACCESS_DENIED;
+
+ efi_status = get_variable_attr(db_name, &MokListData, &MokListDataSize,
+ SHIM_LOCK_GUID, &attributes);
+ if (EFI_ERROR(efi_status)) {
+ if (MokX)
+ console_errorbox(L"Failed to retrieve MokListX");
+ else
+ console_errorbox(L"Failed to retrieve MokList");
+ return EFI_ABORTED;
+ } else if (attributes & EFI_VARIABLE_RUNTIME_ACCESS) {
+ if (MokX) {
+ err_strs[0] = L"MokListX is compromised!";
+ err_strs[1] = L"Erase all keys in MokListX!";
+ } else {
+ err_strs[0] = L"MokList is compromised!";
+ err_strs[1] = L"Erase all keys in MokList!";
}
+ console_alertbox(err_strs);
+ gRT->SetVariable(db_name, &SHIM_LOCK_GUID,
+ EFI_VARIABLE_NON_VOLATILE |
+ EFI_VARIABLE_BOOTSERVICE_ACCESS, 0, NULL);
+ efi_status = EFI_ACCESS_DENIED;
+ goto error;
+ }
- if (status != EFI_SUCCESS)
- return 1;
+ /* Nothing to do */
+ if (!MokListData || MokListDataSize == 0)
+ return EFI_SUCCESS;
- if (!buffersize)
- break;
+ /* Construct lists */
+ mok_num = count_keys(MokListData, MokListDataSize);
+ if (mok_num == 0) {
+ if (MokX) {
+ err_strs[0] = L"Failed to construct the key list of MokListX";
+ err_strs[1] = L"Reset MokListX!";
+ } else {
+ err_strs[0] = L"Failed to construct the key list of MokList";
+ err_strs[1] = L"Reset MokList!";
+ }
+ console_alertbox(err_strs);
+ gRT->SetVariable(db_name, &SHIM_LOCK_GUID,
+ EFI_VARIABLE_NON_VOLATILE |
+ EFI_VARIABLE_BOOTSERVICE_ACCESS, 0, NULL);
+ efi_status = EFI_ABORTED;
+ goto error;
+ }
+ mok = build_mok_list(mok_num, MokListData, MokListDataSize);
+ if (!mok) {
+ console_errorbox(L"Failed to construct key list");
+ efi_status = EFI_ABORTED;
+ goto error;
+ }
+ del_num = count_keys(MokDel, MokDelSize);
+ if (del_num == 0) {
+ console_errorbox(L"Invalid key delete list");
+ efi_status = EFI_ABORTED;
+ goto error;
+ }
+ del_key = build_mok_list(del_num, MokDel, MokDelSize);
+ if (!del_key) {
+ console_errorbox(L"Failed to construct key list");
+ efi_status = EFI_ABORTED;
+ goto error;
+ }
- if ((StrCmp(buffer->FileName, L".") == 0) ||
- (StrCmp(buffer->FileName, L"..") == 0))
- continue;
+ /* Search and destroy */
+ for (i = 0; i < del_num; i++) {
+ if (CompareGuid(&(del_key[i].Type), &X509_GUID) == 0) {
+ delete_cert(del_key[i].Mok, del_key[i].MokSize,
+ mok, mok_num);
+ } else if (is_sha2_hash(del_key[i].Type)) {
+ delete_hash_list(del_key[i].Type, del_key[i].Mok,
+ del_key[i].MokSize, mok, mok_num);
+ }
+ }
+
+ efi_status = write_back_mok_list(mok, mok_num, MokX);
+
+error:
+ if (MokListData)
+ FreePool(MokListData);
+ if (mok)
+ FreePool(mok);
+ if (del_key)
+ FreePool(del_key);
+
+ return efi_status;
+}
- dircount++;
+static EFI_STATUS mok_deletion_prompt(void *MokDel, UINTN MokDelSize,
+ BOOLEAN MokX)
+{
+ EFI_STATUS efi_status;
+ CHAR16 *delete_p[] = { L"Delete the key(s)?", NULL };
+ CHAR16 *title;
+
+ if (MokX)
+ title = L"[Delete MOKX]";
+ else
+ title = L"[Delete MOK]";
+
+ efi_status = list_keys(MokDel, MokDelSize, title);
+ if (EFI_ERROR(efi_status))
+ return efi_status;
- FreePool(buffer);
- buffersize = 0;
+ if (console_yes_no(delete_p) == 0)
+ return EFI_ABORTED;
+
+ efi_status = delete_keys(MokDel, MokDelSize, MokX);
+ if (EFI_ERROR(efi_status)) {
+ console_notify(L"Failed to delete keys");
+ return efi_status;
}
- dircount++;
+ if (MokX) {
+ LibDeleteVariable(L"MokXDel", &SHIM_LOCK_GUID);
+ LibDeleteVariable(L"MokXDelAuth", &SHIM_LOCK_GUID);
+ } else {
+ LibDeleteVariable(L"MokDel", &SHIM_LOCK_GUID);
+ LibDeleteVariable(L"MokDelAuth", &SHIM_LOCK_GUID);
+ }
- dircontent = AllocatePool(sizeof(struct menu_item) * dircount);
+ if (MokDel)
+ FreePool(MokDel);
- dircontent[0].text = StrDuplicate(L"..");
- dircontent[0].callback = NULL;
- dircontent[0].colour = EFI_YELLOW;
- i++;
+ return EFI_SUCCESS;
+}
- uefi_call_wrapper(dir->SetPosition, 2, dir, 0);
+static CHAR16 get_password_charater(CHAR16 * prompt)
+{
+ SIMPLE_TEXT_OUTPUT_MODE SavedMode;
+ EFI_STATUS efi_status;
+ CHAR16 *message[2];
+ CHAR16 character;
+ UINTN length;
+ UINT32 pw_length;
- while (1) {
- status = uefi_call_wrapper(dir->Read, 3, dir, &buffersize,
- buffer);
+ if (!prompt)
+ prompt = L"Password charater: ";
- if (status == EFI_BUFFER_TOO_SMALL) {
- buffer = AllocatePool(buffersize);
- status = uefi_call_wrapper(dir->Read, 3, dir,
- &buffersize, buffer);
- }
+ console_save_and_set_mode(&SavedMode);
- if (status != EFI_SUCCESS)
- return 1;
+ message[0] = prompt;
+ message[1] = NULL;
+ length = StrLen(message[0]);
+ console_print_box_at(message, -1, -length - 4, -5, length + 4, 3, 0, 1);
+ efi_status = get_line(&pw_length, &character, 1, 0);
+ if (EFI_ERROR(efi_status))
+ character = 0;
- if (!buffersize)
- break;
+ console_restore_mode(&SavedMode);
- if ((StrCmp(buffer->FileName, L".") == 0) ||
- (StrCmp(buffer->FileName, L"..") == 0))
- continue;
+ return character;
+}
+
+static EFI_STATUS mok_sb_prompt(void *MokSB, UINTN MokSBSize)
+{
+ EFI_STATUS efi_status;
+ SIMPLE_TEXT_OUTPUT_MODE SavedMode;
+ MokSBvar *var = MokSB;
+ CHAR16 *message[4];
+ CHAR16 pass1, pass2, pass3;
+ CHAR16 *str;
+ UINT8 fail_count = 0;
+ UINT8 sbval = 1;
+ UINT8 pos1, pos2, pos3;
+ int ret;
+ CHAR16 *disable_sb[] = { L"Disable Secure Boot", NULL };
+ CHAR16 *enable_sb[] = { L"Enable Secure Boot", NULL };
+
+ if (MokSBSize != sizeof(MokSBvar)) {
+ console_notify(L"Invalid MokSB variable contents");
+ return EFI_INVALID_PARAMETER;
+ }
+
+ ST->ConOut->ClearScreen(ST->ConOut);
+
+ message[0] = L"Change Secure Boot state";
+ message[1] = NULL;
+
+ console_save_and_set_mode(&SavedMode);
+ console_print_box_at(message, -1, 0, 0, -1, -1, 1, 1);
+ console_restore_mode(&SavedMode);
+
+ while (fail_count < 3) {
+ RandomBytes(&pos1, sizeof(pos1));
+ pos1 = (pos1 % var->PWLen);
+
+ do {
+ RandomBytes(&pos2, sizeof(pos2));
+ pos2 = (pos2 % var->PWLen);
+ } while (pos2 == pos1);
+
+ do {
+ RandomBytes(&pos3, sizeof(pos3));
+ pos3 = (pos3 % var->PWLen);
+ } while (pos3 == pos2 || pos3 == pos1);
+
+ str = PoolPrint(L"Enter password character %d: ", pos1 + 1);
+ if (!str) {
+ console_errorbox(L"Failed to allocate buffer");
+ return EFI_OUT_OF_RESOURCES;
+ }
+ pass1 = get_password_charater(str);
+ FreePool(str);
- if (buffer->Attribute & EFI_FILE_DIRECTORY) {
- dircontent[i].text = StrDuplicate(buffer->FileName);
- dircontent[i].callback = directory_callback;
- dircontent[i].data = dircontent[i].text;
- dircontent[i].data2 = dir;
- dircontent[i].colour = EFI_YELLOW;
+ str = PoolPrint(L"Enter password character %d: ", pos2 + 1);
+ if (!str) {
+ console_errorbox(L"Failed to allocate buffer");
+ return EFI_OUT_OF_RESOURCES;
+ }
+ pass2 = get_password_charater(str);
+ FreePool(str);
+
+ str = PoolPrint(L"Enter password character %d: ", pos3 + 1);
+ if (!str) {
+ console_errorbox(L"Failed to allocate buffer");
+ return EFI_OUT_OF_RESOURCES;
+ }
+ pass3 = get_password_charater(str);
+ FreePool(str);
+
+ if (pass1 != var->Password[pos1] ||
+ pass2 != var->Password[pos2] ||
+ pass3 != var->Password[pos3]) {
+ console_print(L"Invalid character\n");
+ fail_count++;
} else {
- dircontent[i].text = StrDuplicate(buffer->FileName);
- dircontent[i].callback = file_callback;
- dircontent[i].data = dircontent[i].text;
- dircontent[i].data2 = dir;
- dircontent[i].colour = EFI_WHITE;
+ break;
}
+ }
- i++;
- FreePool(buffer);
- buffersize = 0;
- buffer = NULL;
+ if (fail_count >= 3) {
+ console_notify(L"Password limit reached");
+ return EFI_ACCESS_DENIED;
}
- run_menu(dircontent, dircount);
+ if (var->MokSBState == 0)
+ ret = console_yes_no(disable_sb);
+ else
+ ret = console_yes_no(enable_sb);
+
+ if (ret == 0) {
+ LibDeleteVariable(L"MokSB", &SHIM_LOCK_GUID);
+ return EFI_ABORTED;
+ }
- return 0;
+ if (var->MokSBState == 0) {
+ efi_status = gRT->SetVariable(L"MokSBState", &SHIM_LOCK_GUID,
+ EFI_VARIABLE_NON_VOLATILE |
+ EFI_VARIABLE_BOOTSERVICE_ACCESS,
+ 1, &sbval);
+ if (EFI_ERROR(efi_status)) {
+ console_notify(L"Failed to set Secure Boot state");
+ return efi_status;
+ }
+ } else {
+ efi_status = gRT->SetVariable(L"MokSBState", &SHIM_LOCK_GUID,
+ EFI_VARIABLE_NON_VOLATILE |
+ EFI_VARIABLE_BOOTSERVICE_ACCESS,
+ 0, NULL);
+ if (EFI_ERROR(efi_status)) {
+ console_notify(L"Failed to delete Secure Boot state");
+ return efi_status;
+ }
+ }
+
+ return EFI_SUCCESS;
}
-static UINTN filesystem_callback (void *data, void *data2) {
- EFI_FILE_INFO *buffer = NULL;
- UINTN buffersize = 0;
- EFI_STATUS status;
- UINTN dircount = 0, i = 0;
- struct menu_item *dircontent;
- EFI_FILE *root = data;
- EFI_FILE *parent = data2;
+static EFI_STATUS mok_db_prompt(void *MokDB, UINTN MokDBSize)
+{
+ EFI_STATUS efi_status;
+ SIMPLE_TEXT_OUTPUT_MODE SavedMode;
+ MokDBvar *var = MokDB;
+ CHAR16 *message[4];
+ CHAR16 pass1, pass2, pass3;
+ CHAR16 *str;
+ UINT8 fail_count = 0;
+ UINT8 dbval = 1;
+ UINT8 pos1, pos2, pos3;
+ int ret;
+ CHAR16 *ignore_db[] = { L"Ignore DB certs/hashes", NULL };
+ CHAR16 *use_db[] = { L"Use DB certs/hashes", NULL };
+
+ if (MokDBSize != sizeof(MokDBvar)) {
+ console_notify(L"Invalid MokDB variable contents");
+ return EFI_INVALID_PARAMETER;
+ }
- uefi_call_wrapper(root->SetPosition, 2, root, 0);
+ ST->ConOut->ClearScreen(ST->ConOut);
- while (1) {
- status = uefi_call_wrapper(root->Read, 3, root, &buffersize,
- buffer);
+ message[0] = L"Change DB state";
+ message[1] = NULL;
- if (status == EFI_BUFFER_TOO_SMALL) {
- buffer = AllocatePool(buffersize);
- status = uefi_call_wrapper(root->Read, 3, root,
- &buffersize, buffer);
+ console_save_and_set_mode(&SavedMode);
+ console_print_box_at(message, -1, 0, 0, -1, -1, 1, 1);
+ console_restore_mode(&SavedMode);
+
+ while (fail_count < 3) {
+ RandomBytes(&pos1, sizeof(pos1));
+ pos1 = (pos1 % var->PWLen);
+
+ do {
+ RandomBytes(&pos2, sizeof(pos2));
+ pos2 = (pos2 % var->PWLen);
+ } while (pos2 == pos1);
+
+ do {
+ RandomBytes(&pos3, sizeof(pos3));
+ pos3 = (pos3 % var->PWLen);
+ } while (pos3 == pos2 || pos3 == pos1);
+
+ str = PoolPrint(L"Enter password character %d: ", pos1 + 1);
+ if (!str) {
+ console_errorbox(L"Failed to allocate buffer");
+ return EFI_OUT_OF_RESOURCES;
+ }
+ pass1 = get_password_charater(str);
+ FreePool(str);
+
+ str = PoolPrint(L"Enter password character %d: ", pos2 + 1);
+ if (!str) {
+ console_errorbox(L"Failed to allocate buffer");
+ return EFI_OUT_OF_RESOURCES;
}
+ pass2 = get_password_charater(str);
+ FreePool(str);
- if (status != EFI_SUCCESS)
- return 1;
+ str = PoolPrint(L"Enter password character %d: ", pos3 + 1);
+ if (!str) {
+ console_errorbox(L"Failed to allocate buffer");
+ return EFI_OUT_OF_RESOURCES;
+ }
+ pass3 = get_password_charater(str);
+ FreePool(str);
- if (!buffersize)
+ if (pass1 != var->Password[pos1] ||
+ pass2 != var->Password[pos2] ||
+ pass3 != var->Password[pos3]) {
+ console_print(L"Invalid character\n");
+ fail_count++;
+ } else {
break;
+ }
+ }
- if ((StrCmp(buffer->FileName, L".") == 0) ||
- (StrCmp(buffer->FileName, L"..") == 0))
- continue;
+ if (fail_count >= 3) {
+ console_notify(L"Password limit reached");
+ return EFI_ACCESS_DENIED;
+ }
- dircount++;
+ if (var->MokDBState == 0)
+ ret = console_yes_no(ignore_db);
+ else
+ ret = console_yes_no(use_db);
- FreePool(buffer);
- buffersize = 0;
+ if (ret == 0) {
+ LibDeleteVariable(L"MokDB", &SHIM_LOCK_GUID);
+ return EFI_ABORTED;
}
- if (parent)
- dircount++;
+ if (var->MokDBState == 0) {
+ efi_status = gRT->SetVariable(L"MokDBState", &SHIM_LOCK_GUID,
+ EFI_VARIABLE_NON_VOLATILE |
+ EFI_VARIABLE_BOOTSERVICE_ACCESS,
+ 1, &dbval);
+ if (EFI_ERROR(efi_status)) {
+ console_notify(L"Failed to set DB state");
+ return efi_status;
+ }
+ } else {
+ efi_status = gRT->SetVariable(L"MokDBState", &SHIM_LOCK_GUID,
+ EFI_VARIABLE_NON_VOLATILE |
+ EFI_VARIABLE_BOOTSERVICE_ACCESS,
+ 0, NULL);
+ if (EFI_ERROR(efi_status)) {
+ console_notify(L"Failed to delete DB state");
+ return efi_status;
+ }
+ }
- dircontent = AllocatePool(sizeof(struct menu_item) * dircount);
+ return EFI_SUCCESS;
+}
- dircontent[0].text = StrDuplicate(L"Return to filesystem list");
- dircontent[0].callback = NULL;
- dircontent[0].colour = EFI_YELLOW;
- i++;
+static EFI_STATUS mok_pw_prompt(void *MokPW, UINTN MokPWSize)
+{
+ EFI_STATUS efi_status;
+ UINT8 hash[PASSWORD_CRYPT_SIZE];
+ UINT8 clear = 0;
+ CHAR16 *clear_p[] = { L"Clear MOK password?", NULL };
+ CHAR16 *set_p[] = { L"Set MOK password?", NULL };
+
+ if (MokPWSize != SHA256_DIGEST_SIZE && MokPWSize != PASSWORD_CRYPT_SIZE) {
+ console_notify(L"Invalid MokPW variable contents");
+ return EFI_INVALID_PARAMETER;
+ }
- uefi_call_wrapper(root->SetPosition, 2, root, 0);
+ ST->ConOut->ClearScreen(ST->ConOut);
- while (1) {
- status = uefi_call_wrapper(root->Read, 3, root, &buffersize,
- buffer);
+ SetMem(hash, PASSWORD_CRYPT_SIZE, 0);
- if (status == EFI_BUFFER_TOO_SMALL) {
- buffer = AllocatePool(buffersize);
- status = uefi_call_wrapper(root->Read, 3, root,
- &buffersize, buffer);
- }
+ if (MokPWSize == PASSWORD_CRYPT_SIZE) {
+ if (CompareMem(MokPW, hash, PASSWORD_CRYPT_SIZE) == 0)
+ clear = 1;
+ } else {
+ if (CompareMem(MokPW, hash, SHA256_DIGEST_SIZE) == 0)
+ clear = 1;
+ }
- if (status != EFI_SUCCESS)
- return 1;
+ if (clear) {
+ if (console_yes_no(clear_p) == 0)
+ return EFI_ABORTED;
- if (!buffersize)
- break;
+ gRT->SetVariable(L"MokPWStore", &SHIM_LOCK_GUID,
+ EFI_VARIABLE_NON_VOLATILE |
+ EFI_VARIABLE_BOOTSERVICE_ACCESS, 0, NULL);
+ goto mokpw_done;
+ }
- if ((StrCmp(buffer->FileName, L".") == 0) ||
- (StrCmp(buffer->FileName, L"..") == 0))
- continue;
+ if (MokPWSize == PASSWORD_CRYPT_SIZE) {
+ efi_status = match_password((PASSWORD_CRYPT *) MokPW, NULL, 0,
+ NULL, L"Confirm MOK passphrase: ");
+ } else {
+ efi_status = match_password(NULL, NULL, 0, MokPW,
+ L"Confirm MOK passphrase: ");
+ }
- if (buffer->Attribute & EFI_FILE_DIRECTORY) {
- dircontent[i].text = StrDuplicate(buffer->FileName);
- dircontent[i].callback = directory_callback;
- dircontent[i].data = dircontent[i].text;
- dircontent[i].data2 = root;
- dircontent[i].colour = EFI_YELLOW;
- } else {
- dircontent[i].text = StrDuplicate(buffer->FileName);
- dircontent[i].callback = file_callback;
- dircontent[i].data = dircontent[i].text;
- dircontent[i].data2 = root;
- dircontent[i].colour = EFI_WHITE;
- }
+ if (EFI_ERROR(efi_status)) {
+ console_notify(L"Password limit reached");
+ return efi_status;
+ }
- i++;
- FreePool(buffer);
- buffer = NULL;
- buffersize = 0;
+ if (console_yes_no(set_p) == 0)
+ return EFI_ABORTED;
+
+ efi_status = gRT->SetVariable(L"MokPWStore", &SHIM_LOCK_GUID,
+ EFI_VARIABLE_NON_VOLATILE |
+ EFI_VARIABLE_BOOTSERVICE_ACCESS,
+ MokPWSize, MokPW);
+ if (EFI_ERROR(efi_status)) {
+ console_notify(L"Failed to set MOK password");
+ return efi_status;
}
- run_menu(dircontent, dircount);
+mokpw_done:
+ LibDeleteVariable(L"MokPW", &SHIM_LOCK_GUID);
- return 0;
+ return EFI_SUCCESS;
}
-static UINTN find_fs (void *data, void *data2) {
- EFI_GUID fs_guid = SIMPLE_FILE_SYSTEM_PROTOCOL;
- UINTN count, i;
- EFI_HANDLE **filesystem_handles;
- struct menu_item *filesystems;
+static BOOLEAN verify_certificate(UINT8 * cert, UINTN size)
+{
+ X509 *X509Cert;
+ UINTN length;
+ if (!cert || size < 4)
+ return FALSE;
+
+ /*
+ * A DER encoding x509 certificate starts with SEQUENCE(0x30),
+ * the number of length bytes, and the number of value bytes.
+ * The size of a x509 certificate is usually between 127 bytes
+ * and 64KB. For convenience, assume the number of value bytes
+ * is 2, i.e. the second byte is 0x82.
+ */
+ if (cert[0] != 0x30 || cert[1] != 0x82) {
+ console_notify(L"Not a DER encoding X509 certificate");
+ return FALSE;
+ }
- uefi_call_wrapper(BS->LocateHandleBuffer, 5, ByProtocol, &fs_guid,
- NULL, &count, &filesystem_handles);
+ length = (cert[2] << 8 | cert[3]);
+ if (length != (size - 4)) {
+ console_notify(L"Invalid X509 certificate: Inconsistent size");
+ return FALSE;
+ }
- if (!count || !filesystem_handles) {
- Print(L"No filesystems?\n");
- return 1;
+ if (!(X509ConstructCertificate(cert, size, (UINT8 **) & X509Cert)) ||
+ X509Cert == NULL) {
+ console_notify(L"Invalid X509 certificate");
+ return FALSE;
}
- count++;
+ X509_free(X509Cert);
+ return TRUE;
+}
- filesystems = AllocatePool(sizeof(struct menu_item) * count);
+static EFI_STATUS enroll_file(void *data, UINTN datasize, BOOLEAN hash)
+{
+ EFI_STATUS efi_status = EFI_SUCCESS;
+ EFI_SIGNATURE_LIST *CertList;
+ EFI_SIGNATURE_DATA *CertData;
+ UINTN mokbuffersize;
+ void *mokbuffer = NULL;
- filesystems[0].text = StrDuplicate(L"Exit");
- filesystems[0].callback = NULL;
- filesystems[0].colour = EFI_YELLOW;
+ if (hash) {
+ UINT8 sha256[SHA256_DIGEST_SIZE];
+ UINT8 sha1[SHA1_DIGEST_SIZE];
+ SHIM_LOCK *shim_lock;
+ PE_COFF_LOADER_IMAGE_CONTEXT context;
+
+ efi_status = LibLocateProtocol(&SHIM_LOCK_GUID,
+ (VOID **) &shim_lock);
+ if (EFI_ERROR(efi_status))
+ goto out;
+
+ mokbuffersize = sizeof(EFI_SIGNATURE_LIST) + sizeof(EFI_GUID) +
+ SHA256_DIGEST_SIZE;
+
+ mokbuffer = AllocatePool(mokbuffersize);
+ if (!mokbuffer)
+ goto out;
+
+ efi_status = shim_lock->Context(data, datasize, &context);
+ if (EFI_ERROR(efi_status))
+ goto out;
+
+ efi_status = shim_lock->Hash(data, datasize, &context, sha256,
+ sha1);
+ if (EFI_ERROR(efi_status))
+ goto out;
+
+ CertList = mokbuffer;
+ CertList->SignatureType = EFI_CERT_SHA256_GUID;
+ CertList->SignatureSize = 16 + SHA256_DIGEST_SIZE;
+ CertData = (EFI_SIGNATURE_DATA *) (((UINT8 *) mokbuffer) +
+ sizeof(EFI_SIGNATURE_LIST));
+ CopyMem(CertData->SignatureData, sha256, SHA256_DIGEST_SIZE);
+ } else {
+ mokbuffersize = datasize + sizeof(EFI_SIGNATURE_LIST) +
+ sizeof(EFI_GUID);
+ mokbuffer = AllocatePool(mokbuffersize);
- for (i=1; i<count; i++) {
- EFI_HANDLE *fs = filesystem_handles[i-1];
- EFI_FILE_IO_INTERFACE *fs_interface;
- EFI_DEVICE_PATH *path;
- EFI_FILE *root;
- EFI_STATUS status;
- CHAR16 *VolumeLabel = NULL;
- EFI_FILE_SYSTEM_INFO *buffer = NULL;
- UINTN buffersize = 0;
- EFI_GUID file_info_guid = EFI_FILE_INFO_ID;
+ if (!mokbuffer)
+ goto out;
- status = uefi_call_wrapper(BS->HandleProtocol, 3, fs, &fs_guid,
- &fs_interface);
+ CertList = mokbuffer;
+ CertList->SignatureType = X509_GUID;
+ CertList->SignatureSize = 16 + datasize;
- if (status != EFI_SUCCESS || !fs_interface)
- continue;
+ memcpy(mokbuffer + sizeof(EFI_SIGNATURE_LIST) + 16, data,
+ datasize);
- path = DevicePathFromHandle(fs);
+ CertData = (EFI_SIGNATURE_DATA *) (((UINT8 *) mokbuffer) +
+ sizeof(EFI_SIGNATURE_LIST));
+ }
- status = uefi_call_wrapper(fs_interface->OpenVolume, 2,
- fs_interface, &root);
+ CertList->SignatureListSize = mokbuffersize;
+ CertList->SignatureHeaderSize = 0;
+ CertData->SignatureOwner = SHIM_LOCK_GUID;
- if (status != EFI_SUCCESS || !root)
- continue;
+ if (!hash) {
+ if (!verify_certificate(CertData->SignatureData, datasize))
+ goto out;
+ }
+
+ efi_status = mok_enrollment_prompt(mokbuffer, mokbuffersize,
+ FALSE, FALSE);
+out:
+ if (mokbuffer)
+ FreePool(mokbuffer);
+
+ return efi_status;
+}
+
+static EFI_STATUS mok_hash_enroll(void)
+{
+ EFI_STATUS efi_status;
+ CHAR16 *file_name = NULL;
+ EFI_HANDLE im = NULL;
+ EFI_FILE *file = NULL;
+ UINTN filesize;
+ void *data;
+ CHAR16 *selections[] = {
+ L"Select Binary",
+ L"",
+ L"The Selected Binary will have its hash Enrolled",
+ L"This means it will subsequently Boot with no prompting",
+ L"Remember to make sure it is a genuine binary before enrolling its hash",
+ NULL
+ };
+
+ simple_file_selector(&im, selections, L"\\", L"", &file_name);
+
+ if (!file_name)
+ return EFI_INVALID_PARAMETER;
+
+ efi_status = simple_file_open(im, file_name, &file, EFI_FILE_MODE_READ);
+ if (EFI_ERROR(efi_status)) {
+ console_error(L"Unable to open file", efi_status);
+ return efi_status;
+ }
+
+ simple_file_read_all(file, &filesize, &data);
+ file->Close(file);
+ if (!filesize) {
+ console_error(L"Unable to read file", efi_status);
+ return EFI_BAD_BUFFER_SIZE;
+ }
+
+ efi_status = enroll_file(data, filesize, TRUE);
+ if (EFI_ERROR(efi_status))
+ console_error(
+ L"Hash failed (did you select a valid EFI binary?)",
+ efi_status);
+
+ FreePool(data);
+
+ return efi_status;
+}
+
+static CHAR16 *der_suffix[] = {
+ L".cer",
+ L".der",
+ L".crt",
+ NULL
+};
- status = uefi_call_wrapper(root->GetInfo, 4, root,
- &file_info_guid, &buffersize,
- buffer);
+static BOOLEAN check_der_suffix(CHAR16 * file_name)
+{
+ CHAR16 suffix[5];
+ int i;
+
+ if (!file_name || StrLen(file_name) <= 4)
+ return FALSE;
+
+ suffix[0] = '\0';
+ StrnCat(suffix, file_name + StrLen(file_name) - 4, 4);
- if (status == EFI_BUFFER_TOO_SMALL) {
- buffer = AllocatePool(buffersize);
- status = uefi_call_wrapper(root->GetInfo, 4, root,
- &file_info_guid,
- &buffersize, buffer);
+ StrLwr(suffix);
+ for (i = 0; der_suffix[i] != NULL; i++) {
+ if (StrCmp(suffix, der_suffix[i]) == 0) {
+ return TRUE;
}
+ }
- if (status == EFI_SUCCESS)
- VolumeLabel = buffer->VolumeLabel;
+ return FALSE;
+}
- if (path)
- filesystems[i].text = DevicePathToStr(path);
- else
- filesystems[i].text = StrDuplicate(L"Unknown device\n");
- if (VolumeLabel)
- StrCat(filesystems[i].text, VolumeLabel);
+static EFI_STATUS mok_key_enroll(void)
+{
+ EFI_STATUS efi_status;
+ CHAR16 *file_name = NULL;
+ EFI_HANDLE im = NULL;
+ EFI_FILE *file = NULL;
+ UINTN filesize;
+ void *data;
+ CHAR16 *selections[] = {
+ L"Select Key",
+ L"",
+ L"The selected key will be enrolled into the MOK database",
+ L"This means any binaries signed with it will be run without prompting",
+ L"Remember to make sure it is a genuine key before Enrolling it",
+ NULL
+ };
+ CHAR16 *alert[] = {
+ L"Unsupported Format",
+ L"",
+ L"Only DER encoded certificate (*.cer/der/crt) is supported",
+ NULL
+ };
+
+ simple_file_selector(&im, selections, L"\\", L"", &file_name);
+
+ if (!file_name)
+ return EFI_INVALID_PARAMETER;
+
+ if (!check_der_suffix(file_name)) {
+ console_alertbox(alert);
+ return EFI_UNSUPPORTED;
+ }
- if (buffersize)
- FreePool(buffer);
+ efi_status = simple_file_open(im, file_name, &file, EFI_FILE_MODE_READ);
+ if (EFI_ERROR(efi_status)) {
+ console_error(L"Unable to open file", efi_status);
+ return efi_status;
+ }
- filesystems[i].data = root;
- filesystems[i].data2 = NULL;
- filesystems[i].callback = filesystem_callback;
- filesystems[i].colour = EFI_YELLOW;
+ simple_file_read_all(file, &filesize, &data);
+ file->Close(file);
+ if (!filesize) {
+ console_error(L"Unable to read file", efi_status);
+ return EFI_BAD_BUFFER_SIZE;
}
- uefi_call_wrapper(BS->FreePool, 1, filesystem_handles);
+ efi_status = enroll_file(data, filesize, FALSE);
+ FreePool(data);
- run_menu(filesystems, count);
+ return efi_status;
+}
- return 0;
+static BOOLEAN verify_pw(BOOLEAN * protected)
+{
+ EFI_STATUS efi_status;
+ SIMPLE_TEXT_OUTPUT_MODE SavedMode;
+ UINT8 pwhash[PASSWORD_CRYPT_SIZE];
+ UINTN size = PASSWORD_CRYPT_SIZE;
+ UINT32 attributes;
+ CHAR16 *message[2];
+
+ *protected = FALSE;
+
+ efi_status = gRT->GetVariable(L"MokPWStore", &SHIM_LOCK_GUID, &attributes,
+ &size, pwhash);
+ /*
+ * If anything can attack the password it could just set it to a
+ * known value, so there's no safety advantage in failing to validate
+ * purely because of a failure to read the variable
+ */
+ if (EFI_ERROR(efi_status) ||
+ (size != SHA256_DIGEST_SIZE && size != PASSWORD_CRYPT_SIZE))
+ return TRUE;
+
+ if (attributes & EFI_VARIABLE_RUNTIME_ACCESS)
+ return TRUE;
+
+ ST->ConOut->ClearScreen(ST->ConOut);
+
+ /* Draw the background */
+ console_save_and_set_mode(&SavedMode);
+ message[0] = PoolPrint(L"%s UEFI key management", SHIM_VENDOR);
+ message[1] = NULL;
+ console_print_box_at(message, -1, 0, 0, -1, -1, 1, 1);
+ FreePool(message[0]);
+ console_restore_mode(&SavedMode);
+
+ if (size == PASSWORD_CRYPT_SIZE) {
+ efi_status = match_password((PASSWORD_CRYPT *) pwhash, NULL, 0,
+ NULL, L"Enter MOK password:");
+ } else {
+ efi_status = match_password(NULL, NULL, 0, pwhash,
+ L"Enter MOK password:");
+ }
+ if (EFI_ERROR(efi_status)) {
+ console_notify(L"Password limit reached");
+ return FALSE;
+ }
+
+ *protected = TRUE;
+
+ return TRUE;
}
-static EFI_STATUS enter_mok_menu(EFI_HANDLE image_handle, void *MokNew)
+static int draw_countdown()
{
- struct menu_item *menu_item;
- UINT32 MokNum;
- UINTN menucount = 0;
+ SIMPLE_TEXT_OUTPUT_INTERFACE *co = ST->ConOut;
+ SIMPLE_INPUT_INTERFACE *ci = ST->ConIn;
+ SIMPLE_TEXT_OUTPUT_MODE SavedMode;
+ EFI_INPUT_KEY key;
+ EFI_STATUS efi_status;
+ UINTN cols, rows;
+ CHAR16 *title[2];
+ CHAR16 *message = L"Press any key to perform MOK management";
+ void *MokTimeout = NULL;
+ MokTimeoutvar *var;
+ UINTN MokTimeoutSize = 0;
+ int timeout, wait = 10000000;
+
+ efi_status = get_variable(L"MokTimeout", (UINT8 **) &MokTimeout,
+ &MokTimeoutSize, SHIM_LOCK_GUID);
+ if (EFI_ERROR(efi_status)) {
+ timeout = 10;
+ } else {
+ var = MokTimeout;
+ timeout = (int)var->Timeout;
+ FreePool(MokTimeout);
+ LibDeleteVariable(L"MokTimeout", &SHIM_LOCK_GUID);
+ }
- if (MokNew)
- menu_item = AllocateZeroPool(sizeof(struct menu_item) * 3);
- else
- menu_item = AllocateZeroPool(sizeof(struct menu_item) * 2);
+ if (timeout < 0)
+ return timeout;
- if (!menu_item)
- return EFI_OUT_OF_RESOURCES;
+ console_save_and_set_mode(&SavedMode);
- menu_item[0].text = StrDuplicate(L"Continue boot");
- menu_item[0].colour = EFI_WHITE;
- menu_item[0].callback = NULL;
+ title[0] = PoolPrint(L"%s UEFI key management", SHIM_VENDOR);
+ title[1] = NULL;
- menucount++;
+ console_print_box_at(title, -1, 0, 0, -1, -1, 1, 1);
- if (MokNew) {
- CopyMem(&MokNum, MokNew, sizeof(UINT32));
- if (MokNum == 0) {
- menu_item[1].text = StrDuplicate(L"Delete MOK");
- menu_item[1].colour = EFI_WHITE;
- menu_item[1].data = MokNew;
- menu_item[1].callback = mok_deletion_prompt;
- } else {
- menu_item[1].text = StrDuplicate(L"Enroll MOK\n");
- menu_item[1].colour = EFI_WHITE;
- menu_item[1].data = MokNew;
- menu_item[1].callback = mok_enrollment_prompt;
+ co->QueryMode(co, co->Mode->Mode, &cols, &rows);
+
+ console_print_at((cols - StrLen(message)) / 2, rows / 2, message);
+ while (1) {
+ if (timeout > 1)
+ console_print_at(2, rows - 3,
+ L"Booting in %d seconds ",
+ timeout);
+ else if (timeout)
+ console_print_at(2, rows - 3,
+ L"Booting in %d second ",
+ timeout);
+
+ efi_status = WaitForSingleEvent(ci->WaitForKey, wait);
+ if (efi_status != EFI_TIMEOUT) {
+ /* Clear the key in the queue */
+ ci->ReadKeyStroke(ci, &key);
+ break;
}
- menucount++;
+
+ timeout--;
+ if (!timeout)
+ break;
}
- menu_item[menucount].text = StrDuplicate(L"Enroll key from disk");
- menu_item[menucount].colour = EFI_WHITE;
- menu_item[menucount].callback = find_fs;
+ FreePool(title[0]);
- menucount++;
+ console_restore_mode(&SavedMode);
- run_menu(menu_item, menucount);
+ return timeout;
+}
- return 0;
+typedef enum {
+ MOK_BOOT,
+ MOK_RESET_MOK,
+ MOK_RESET_MOKX,
+ MOK_ENROLL_MOK,
+ MOK_ENROLL_MOKX,
+ MOK_DELETE_MOK,
+ MOK_DELETE_MOKX,
+ MOK_CHANGE_SB,
+ MOK_SET_PW,
+ MOK_CHANGE_DB,
+ MOK_KEY_ENROLL,
+ MOK_HASH_ENROLL
+} mok_menu_item;
+
+static void free_menu(mok_menu_item * menu_item, CHAR16 ** menu_strings)
+{
+ if (menu_strings)
+ FreePool(menu_strings);
+
+ if (menu_item)
+ FreePool(menu_item);
+}
+
+static EFI_STATUS enter_mok_menu(EFI_HANDLE image_handle,
+ void *MokNew, UINTN MokNewSize,
+ void *MokDel, UINTN MokDelSize,
+ void *MokSB, UINTN MokSBSize,
+ void *MokPW, UINTN MokPWSize,
+ void *MokDB, UINTN MokDBSize,
+ void *MokXNew, UINTN MokXNewSize,
+ void *MokXDel, UINTN MokXDelSize)
+{
+ CHAR16 **menu_strings = NULL;
+ mok_menu_item *menu_item = NULL;
+ int choice = 0;
+ int mok_changed = 0;
+ EFI_STATUS efi_status;
+ UINT8 auth[PASSWORD_CRYPT_SIZE];
+ UINTN auth_size = PASSWORD_CRYPT_SIZE;
+ UINT32 attributes;
+ BOOLEAN protected;
+ CHAR16 *mok_mgmt_p[] = { L"Perform MOK management", NULL };
+ EFI_STATUS ret = EFI_SUCCESS;
+
+ if (verify_pw(&protected) == FALSE)
+ return EFI_ACCESS_DENIED;
+
+ if (protected == FALSE && draw_countdown() == 0)
+ goto out;
+
+ while (choice >= 0) {
+ UINTN menucount = 3, i = 0;
+ UINT32 MokAuth = 0;
+ UINT32 MokDelAuth = 0;
+ UINT32 MokXAuth = 0;
+ UINT32 MokXDelAuth = 0;
+
+ efi_status = gRT->GetVariable(L"MokAuth", &SHIM_LOCK_GUID,
+ &attributes, &auth_size, auth);
+ if (!EFI_ERROR(efi_status) &&
+ (auth_size == SHA256_DIGEST_SIZE ||
+ auth_size == PASSWORD_CRYPT_SIZE))
+ MokAuth = 1;
+
+ efi_status = gRT->GetVariable(L"MokDelAuth", &SHIM_LOCK_GUID,
+ &attributes, &auth_size, auth);
+ if (!EFI_ERROR(efi_status) &&
+ (auth_size == SHA256_DIGEST_SIZE ||
+ auth_size == PASSWORD_CRYPT_SIZE))
+ MokDelAuth = 1;
+
+ efi_status = gRT->GetVariable(L"MokXAuth", &SHIM_LOCK_GUID,
+ &attributes, &auth_size, auth);
+ if (!EFI_ERROR(efi_status) &&
+ (auth_size == SHA256_DIGEST_SIZE ||
+ auth_size == PASSWORD_CRYPT_SIZE))
+ MokXAuth = 1;
+
+ efi_status = gRT->GetVariable(L"MokXDelAuth", &SHIM_LOCK_GUID,
+ &attributes, &auth_size, auth);
+ if (!EFI_ERROR(efi_status) &&
+ (auth_size == SHA256_DIGEST_SIZE ||
+ auth_size == PASSWORD_CRYPT_SIZE))
+ MokXDelAuth = 1;
+
+ if (MokNew || MokAuth)
+ menucount++;
+
+ if (MokDel || MokDelAuth)
+ menucount++;
+
+ if (MokXNew || MokXAuth)
+ menucount++;
+
+ if (MokXDel || MokXDelAuth)
+ menucount++;
+
+ if (MokSB)
+ menucount++;
+
+ if (MokPW)
+ menucount++;
+
+ if (MokDB)
+ menucount++;
+
+ menu_strings = AllocateZeroPool(sizeof(CHAR16 *) *
+ (menucount + 1));
+ if (!menu_strings)
+ return EFI_OUT_OF_RESOURCES;
+
+ menu_item = AllocateZeroPool(sizeof(mok_menu_item) * menucount);
+ if (!menu_item) {
+ FreePool(menu_strings);
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ if (mok_changed)
+ menu_strings[i] = L"Reboot";
+ else
+ menu_strings[i] = L"Continue boot";
+ menu_item[i] = MOK_BOOT;
+
+ i++;
+
+ if (MokNew || MokAuth) {
+ if (!MokNew) {
+ menu_strings[i] = L"Reset MOK";
+ menu_item[i] = MOK_RESET_MOK;
+ } else {
+ menu_strings[i] = L"Enroll MOK";
+ menu_item[i] = MOK_ENROLL_MOK;
+ }
+ i++;
+ }
+
+ if (MokDel || MokDelAuth) {
+ menu_strings[i] = L"Delete MOK";
+ menu_item[i] = MOK_DELETE_MOK;
+ i++;
+ }
+
+ if (MokXNew || MokXAuth) {
+ if (!MokXNew) {
+ menu_strings[i] = L"Reset MOKX";
+ menu_item[i] = MOK_RESET_MOKX;
+ } else {
+ menu_strings[i] = L"Enroll MOKX";
+ menu_item[i] = MOK_ENROLL_MOKX;
+ }
+ i++;
+ }
+
+ if (MokXDel || MokXDelAuth) {
+ menu_strings[i] = L"Delete MOKX";
+ menu_item[i] = MOK_DELETE_MOKX;
+ i++;
+ }
+
+ if (MokSB) {
+ menu_strings[i] = L"Change Secure Boot state";
+ menu_item[i] = MOK_CHANGE_SB;
+ i++;
+ }
+
+ if (MokPW) {
+ menu_strings[i] = L"Set MOK password";
+ menu_item[i] = MOK_SET_PW;
+ i++;
+ }
+
+ if (MokDB) {
+ menu_strings[i] = L"Change DB state";
+ menu_item[i] = MOK_CHANGE_DB;
+ i++;
+ }
+
+ menu_strings[i] = L"Enroll key from disk";
+ menu_item[i] = MOK_KEY_ENROLL;
+ i++;
+
+ menu_strings[i] = L"Enroll hash from disk";
+ menu_item[i] = MOK_HASH_ENROLL;
+ i++;
+
+ menu_strings[i] = NULL;
+
+ choice = console_select(mok_mgmt_p, menu_strings, 0);
+ if (choice < 0)
+ goto out;
+
+ switch (menu_item[choice]) {
+ case MOK_BOOT:
+ goto out;
+ case MOK_RESET_MOK:
+ efi_status = mok_reset_prompt(FALSE);
+ break;
+ case MOK_ENROLL_MOK:
+ if (!MokNew) {
+ console_print(L"MokManager: internal error: %s",
+ L"MokNew was !NULL but is now NULL\n");
+ ret = EFI_ABORTED;
+ goto out;
+ }
+ efi_status = mok_enrollment_prompt(MokNew, MokNewSize,
+ TRUE, FALSE);
+ if (!EFI_ERROR(efi_status))
+ MokNew = NULL;
+ break;
+ case MOK_DELETE_MOK:
+ if (!MokDel) {
+ console_print(L"MokManager: internal error: %s",
+ L"MokDel was !NULL but is now NULL\n");
+ ret = EFI_ABORTED;
+ goto out;
+ }
+ efi_status = mok_deletion_prompt(MokDel, MokDelSize,
+ FALSE);
+ if (!EFI_ERROR(efi_status))
+ MokDel = NULL;
+ break;
+ case MOK_RESET_MOKX:
+ efi_status = mok_reset_prompt(TRUE);
+ break;
+ case MOK_ENROLL_MOKX:
+ if (!MokXNew) {
+ console_print(L"MokManager: internal error: %s",
+ L"MokXNew was !NULL but is now NULL\n");
+ ret = EFI_ABORTED;
+ goto out;
+ }
+ efi_status = mok_enrollment_prompt(MokXNew, MokXNewSize,
+ TRUE, TRUE);
+ if (!EFI_ERROR(efi_status))
+ MokXNew = NULL;
+ break;
+ case MOK_DELETE_MOKX:
+ if (!MokXDel) {
+ console_print(L"MokManager: internal error: %s",
+ L"MokXDel was !NULL but is now NULL\n");
+ ret = EFI_ABORTED;
+ goto out;
+ }
+ efi_status = mok_deletion_prompt(MokXDel, MokXDelSize,
+ TRUE);
+ if (!EFI_ERROR(efi_status))
+ MokXDel = NULL;
+ break;
+ case MOK_CHANGE_SB:
+ if (!MokSB) {
+ console_print(L"MokManager: internal error: %s",
+ L"MokSB was !NULL but is now NULL\n");
+ ret = EFI_ABORTED;
+ goto out;
+ }
+ efi_status = mok_sb_prompt(MokSB, MokSBSize);
+ if (!EFI_ERROR(efi_status))
+ MokSB = NULL;
+ break;
+ case MOK_SET_PW:
+ if (!MokPW) {
+ console_print(L"MokManager: internal error: %s",
+ L"MokPW was !NULL but is now NULL\n");
+ ret = EFI_ABORTED;
+ goto out;
+ }
+ efi_status = mok_pw_prompt(MokPW, MokPWSize);
+ if (!EFI_ERROR(efi_status))
+ MokPW = NULL;
+ break;
+ case MOK_CHANGE_DB:
+ if (!MokDB) {
+ console_print(L"MokManager: internal error: %s",
+ L"MokDB was !NULL but is now NULL\n");
+ ret = EFI_ABORTED;
+ goto out;
+ }
+ efi_status = mok_db_prompt(MokDB, MokDBSize);
+ if (!EFI_ERROR(efi_status))
+ MokDB = NULL;
+ break;
+ case MOK_KEY_ENROLL:
+ efi_status = mok_key_enroll();
+ break;
+ case MOK_HASH_ENROLL:
+ efi_status = mok_hash_enroll();
+ break;
+ }
+
+ if (!EFI_ERROR(efi_status))
+ mok_changed = 1;
+
+ free_menu(menu_item, menu_strings);
+ menu_item = NULL;
+ menu_strings = NULL;
+ }
+
+out:
+ free_menu(menu_item, menu_strings);
+
+ if (mok_changed)
+ return reset_system();
+
+ console_reset();
+
+ return ret;
}
static EFI_STATUS check_mok_request(EFI_HANDLE image_handle)
{
- EFI_GUID shim_lock_guid = SHIM_LOCK_GUID;
- UINTN MokNewSize = 0;
+ UINTN MokNewSize = 0, MokDelSize = 0, MokSBSize = 0, MokPWSize = 0;
+ UINTN MokDBSize = 0, MokXNewSize = 0, MokXDelSize = 0;
void *MokNew = NULL;
+ void *MokDel = NULL;
+ void *MokSB = NULL;
+ void *MokPW = NULL;
+ void *MokDB = NULL;
+ void *MokXNew = NULL;
+ void *MokXDel = NULL;
+ EFI_STATUS efi_status;
+
+ efi_status = get_variable(L"MokNew", (UINT8 **) & MokNew, &MokNewSize,
+ SHIM_LOCK_GUID);
+ if (!EFI_ERROR(efi_status)) {
+ efi_status = LibDeleteVariable(L"MokNew", &SHIM_LOCK_GUID);
+ if (EFI_ERROR(efi_status))
+ console_notify(L"Failed to delete MokNew");
+ } else if (EFI_ERROR(efi_status) && efi_status != EFI_NOT_FOUND) {
+ console_error(L"Could not retrieve MokNew", efi_status);
+ }
+
+ efi_status = get_variable(L"MokDel", (UINT8 **) & MokDel, &MokDelSize,
+ SHIM_LOCK_GUID);
+ if (!EFI_ERROR(efi_status)) {
+ efi_status = LibDeleteVariable(L"MokDel", &SHIM_LOCK_GUID);
+ if (EFI_ERROR(efi_status))
+ console_notify(L"Failed to delete MokDel");
+ } else if (EFI_ERROR(efi_status) && efi_status != EFI_NOT_FOUND) {
+ console_error(L"Could not retrieve MokDel", efi_status);
+ }
- MokNew = LibGetVariableAndSize(L"MokNew", &shim_lock_guid, &MokNewSize);
+ efi_status = get_variable(L"MokSB", (UINT8 **) & MokSB, &MokSBSize,
+ SHIM_LOCK_GUID);
+ if (!EFI_ERROR(efi_status)) {
+ efi_status = LibDeleteVariable(L"MokSB", &SHIM_LOCK_GUID);
+ if (EFI_ERROR(efi_status))
+ console_notify(L"Failed to delete MokSB");
+ } else if (EFI_ERROR(efi_status) && efi_status != EFI_NOT_FOUND) {
+ console_error(L"Could not retrieve MokSB", efi_status);
+ }
- enter_mok_menu(image_handle, MokNew);
+ efi_status = get_variable(L"MokPW", (UINT8 **) & MokPW, &MokPWSize,
+ SHIM_LOCK_GUID);
+ if (!EFI_ERROR(efi_status)) {
+ efi_status = LibDeleteVariable(L"MokPW", &SHIM_LOCK_GUID);
+ if (EFI_ERROR(efi_status))
+ console_notify(L"Failed to delete MokPW");
+ } else if (EFI_ERROR(efi_status) && efi_status != EFI_NOT_FOUND) {
+ console_error(L"Could not retrieve MokPW", efi_status);
+ }
- if (MokNew) {
- if (LibDeleteVariable(L"MokNew", &shim_lock_guid) != EFI_SUCCESS) {
- Print(L"Failed to delete MokNew\n");
- }
- FreePool (MokNew);
+ efi_status = get_variable(L"MokDB", (UINT8 **) & MokDB, &MokDBSize,
+ SHIM_LOCK_GUID);
+ if (!EFI_ERROR(efi_status)) {
+ efi_status = LibDeleteVariable(L"MokDB", &SHIM_LOCK_GUID);
+ if (EFI_ERROR(efi_status))
+ console_notify(L"Failed to delete MokDB");
+ } else if (EFI_ERROR(efi_status) && efi_status != EFI_NOT_FOUND) {
+ console_error(L"Could not retrieve MokDB", efi_status);
}
- LibDeleteVariable(L"MokAuth", &shim_lock_guid);
+
+ efi_status = get_variable(L"MokXNew", (UINT8 **) & MokXNew,
+ &MokXNewSize, SHIM_LOCK_GUID);
+ if (!EFI_ERROR(efi_status)) {
+ efi_status = LibDeleteVariable(L"MokXNew", &SHIM_LOCK_GUID);
+ if (EFI_ERROR(efi_status))
+ console_notify(L"Failed to delete MokXNew");
+ } else if (EFI_ERROR(efi_status) && efi_status != EFI_NOT_FOUND) {
+ console_error(L"Could not retrieve MokXNew", efi_status);
+ }
+
+ efi_status = get_variable(L"MokXDel", (UINT8 **) & MokXDel,
+ &MokXDelSize, SHIM_LOCK_GUID);
+ if (!EFI_ERROR(efi_status)) {
+ efi_status = LibDeleteVariable(L"MokXDel", &SHIM_LOCK_GUID);
+ if (EFI_ERROR(efi_status))
+ console_notify(L"Failed to delete MokXDel");
+ } else if (EFI_ERROR(efi_status) && efi_status != EFI_NOT_FOUND) {
+ console_error(L"Could not retrieve MokXDel", efi_status);
+ }
+
+ enter_mok_menu(image_handle, MokNew, MokNewSize, MokDel, MokDelSize,
+ MokSB, MokSBSize, MokPW, MokPWSize, MokDB, MokDBSize,
+ MokXNew, MokXNewSize, MokXDel, MokXDelSize);
+
+ if (MokNew)
+ FreePool(MokNew);
+
+ if (MokDel)
+ FreePool(MokDel);
+
+ if (MokSB)
+ FreePool(MokSB);
+
+ if (MokPW)
+ FreePool(MokPW);
+
+ if (MokDB)
+ FreePool(MokDB);
+
+ if (MokXNew)
+ FreePool(MokXNew);
+
+ if (MokXDel)
+ FreePool(MokXDel);
+
+ LibDeleteVariable(L"MokAuth", &SHIM_LOCK_GUID);
+ LibDeleteVariable(L"MokDelAuth", &SHIM_LOCK_GUID);
+ LibDeleteVariable(L"MokXAuth", &SHIM_LOCK_GUID);
+ LibDeleteVariable(L"MokXDelAuth", &SHIM_LOCK_GUID);
+
+ return EFI_SUCCESS;
+}
+
+static EFI_STATUS setup_rand(void)
+{
+ EFI_TIME time;
+ EFI_STATUS efi_status;
+ UINT64 seed;
+ BOOLEAN status;
+
+ efi_status = gRT->GetTime(&time, NULL);
+ if (EFI_ERROR(efi_status))
+ return efi_status;
+
+ seed = ((UINT64) time.Year << 48) | ((UINT64) time.Month << 40) |
+ ((UINT64) time.Day << 32) | ((UINT64) time.Hour << 24) |
+ ((UINT64) time.Minute << 16) | ((UINT64) time.Second << 8) |
+ ((UINT64) time.Daylight);
+
+ status = RandomSeed((UINT8 *) & seed, sizeof(seed));
+ if (!status)
+ return EFI_ABORTED;
return EFI_SUCCESS;
}
-EFI_STATUS efi_main (EFI_HANDLE image_handle, EFI_SYSTEM_TABLE *systab)
+EFI_STATUS efi_main(EFI_HANDLE image_handle, EFI_SYSTEM_TABLE * systab)
{
EFI_STATUS efi_status;
InitializeLib(image_handle, systab);
+ setup_rand();
+
efi_status = check_mok_request(image_handle);
+ console_fini();
return efi_status;
}
projects / efi-boot-shim.git / blobdiff