Windows: Exclude Argon2 for System Encryption and from automatic detection

Bootloader doesn't support Argon2 yet. We don't want to add overhead to automatic detection for now.

src/Common/BootEncryption.cpp

@@ -1741,6 +1741,10 @@ namespace VeraCrypt
 		if (!bIsGPT && pkcs5_prf != BLAKE2S && pkcs5_prf != SHA256)
 			throw ParameterIncorrect (SRC_POS);
 
+		// we don't support Argon2 for system encryption for now
+		if (pkcs5_prf == ARGON2)
+			throw ParameterIncorrect (SRC_POS);
+
 		int bootSectorId = 0;
 		int bootLoaderId = 0;
 

src/Common/Crypto.c

@@ -822,6 +822,11 @@ BOOL HashForSystemEncryption (int hashId)
 
 }
 
+BOOL HashIsAvailable (int hashId)
+{
+   return (hashId != ARGON2) && (HashGet(hashId) != 0); // Argon2 is not a hash function
+}
+
 // Returns the largest key size needed by an EA for the specified mode of operation
 int EAGetLargestKeyForMode (int mode)
 {

src/Common/Crypto.h

@@ -378,6 +378,7 @@ Hash *HashGet (int id);
 void HashGetName2 (wchar_t *buf, size_t bufLen, int hashId);
 BOOL HashIsDeprecated (int hashId);
 BOOL HashForSystemEncryption (int hashId);
+BOOL HashIsAvailable (int hashId);
 int GetMaxPkcs5OutSize (void);
 #endif
 

src/Common/Dlgcode.c

@@ -6290,6 +6290,10 @@ static BOOL PerformBenchmark(HWND hBenchDlg, HWND hwndDlg)
 			if (benchmarkPreBoot && !benchmarkGPT && !HashForSystemEncryption (thid))
 				continue;
 			
+			// we don't support Argon2 for system encryption
+			if (benchmarkPreBoot && thid == ARGON2)
+				continue;
+
 			if (QueryPerformanceCounter (&performanceCountStart) == 0)
 				goto counter_error;
 
@@ -6800,7 +6804,7 @@ static BOOL CALLBACK RandomPoolEnrichementDlgProc (HWND hwndDlg, UINT msg, WPARA
 			SendMessage (hComboBox, CB_RESETCONTENT, 0, 0);
 			for (hid = FIRST_PRF_ID; hid <= LAST_PRF_ID; hid++)
 			{
-				if (!HashIsDeprecated (hid))
+				if (!HashIsDeprecated (hid) && HashIsAvailable (hid))
 					AddComboPair (hComboBox, HashGetName(hid), hid);
 			}
 			SelectAlgo (hComboBox, &hash_algo);
@@ -6995,7 +6999,7 @@ BOOL CALLBACK KeyfileGeneratorDlgProc (HWND hwndDlg, UINT msg, WPARAM wParam, LP
 			SendMessage (hComboBox, CB_RESETCONTENT, 0, 0);
 			for (hid = FIRST_PRF_ID; hid <= LAST_PRF_ID; hid++)
 			{
-				if (!HashIsDeprecated (hid))
+				if (!HashIsDeprecated (hid) && HashIsAvailable (hid))
 					AddComboPair (hComboBox, HashGetName(hid), hid);
 			}
 			SelectAlgo (hComboBox, &hash_algo);

src/Common/Pkcs5.c

@@ -1349,6 +1349,9 @@ int is_pkcs5_prf_supported (int pkcs5_prf_id, PRF_BOOT_TYPE bootType)
 		|| (bootType != PRF_BOOT_MBR && (pkcs5_prf_id < FIRST_PRF_ID || pkcs5_prf_id > LAST_PRF_ID))
 		)
       return 0;
+   // we don't support Argon2 in pre-boot authentication
+   if ((bootType == PRF_BOOT_MBR || bootType == PRF_BOOT_GPT) && pkcs5_prf_id == ARGON2)
+	  return 0;	
 
    return 1;
 
@@ -1358,6 +1361,7 @@ void derive_key_argon2(char *pwd, int pwd_len, char *salt, int salt_len, uint32
 {
 	//TODO: Implement Argon2 derivation
 	// In case of failure, just fill the derived key dk with zeroes
+	memset(dk, 0, dklen);
 }
 
 void get_argon2_params(int pim, int* pIterations, int* pMemcost)

src/Common/Random.c

@@ -364,7 +364,8 @@ BOOL Randmix ()
 			break;
 
         #ifndef WOLFCRYPT_BACKEND
-               case BLAKE2S:
+		case ARGON2: // in case of Argon2, we use Blake2s
+        case BLAKE2S:
 			burn (&bctx, sizeof(bctx));
 			break;
 

src/Common/Volumes.c

@@ -309,6 +309,14 @@ int ReadVolumeHeader (BOOL bBoot, char *encryptedHeader, Password *password, int
 		if (selected_pkcs5_prf != 0 && enqPkcs5Prf != selected_pkcs5_prf)
 			continue;
 		
+		// we don't support Argon2 in pre-boot authentication
+		if (bBoot && (enqPkcs5Prf == ARGON2))
+			continue;
+
+		// For now, we don't included Argon2 in automatic detection
+		if (selected_pkcs5_prf == 0 && enqPkcs5Prf == ARGON2)
+			continue;
+
 #if !defined(_UEFI)
 		if ((selected_pkcs5_prf == 0) && (encryptionThreadCount > 1))
 		{
@@ -923,6 +931,13 @@ int CreateVolumeHeaderInMemory (HWND hwndDlg, BOOL bBoot, char *header, int ea,
 	if (pim < 0)
 		pim = 0;
 
+	// we don't support Argon2 in pre-boot authentication
+	if (bBoot && (pkcs5_prf == ARGON2))
+	{
+		crypto_close (cryptoInfo);
+		return ERR_PARAMETER_INCORRECT;
+	}
+
 	memset (header, 0, TC_VOLUME_HEADER_EFFECTIVE_SIZE);
 #if !defined(_UEFI)
 	VirtualLock (&keyInfo, sizeof (keyInfo));

src/Format/Tcformat.c

@@ -4195,7 +4195,7 @@ BOOL CALLBACK PageDialogProc (HWND hwndDlg, UINT uMsg, WPARAM wParam, LPARAM lPa
 
 					for (hid = FIRST_PRF_ID; hid <= LAST_PRF_ID; hid++)
 					{
-						if ((!HashIsDeprecated (hid)) && (bSystemIsGPT || HashForSystemEncryption (hid)))
+						if ((!HashIsDeprecated (hid)) && (bSystemIsGPT || HashForSystemEncryption (hid)) && (hid != ARGON2)) // We don't support Argon2 for system encryption
 							AddComboPair (GetDlgItem (hwndDlg, IDC_COMBO_BOX_HASH_ALGO), HashGetName(hid), hid);
 					}
 				}
@@ -5988,7 +5988,7 @@ BOOL CALLBACK PageDialogProc (HWND hwndDlg, UINT uMsg, WPARAM wParam, LPARAM lPa
 				{
 					HWND hHashAlgoItem = GetDlgItem (hwndDlg, IDC_COMBO_BOX_HASH_ALGO);
 					int selectedAlgo = (int) SendMessage (hHashAlgoItem, CB_GETITEMDATA, SendMessage (hHashAlgoItem, CB_GETCURSEL, 0, 0), 0);
-					if (!bSystemIsGPT && !HashForSystemEncryption(selectedAlgo))
+					if ((!bSystemIsGPT && !HashForSystemEncryption(selectedAlgo)) || (selectedAlgo == ARGON2))
 					{
 						hash_algo = DEFAULT_HASH_ALGORITHM_BOOT;
 						RandSetHashFunction (DEFAULT_HASH_ALGORITHM_BOOT);

src/Mount/Mount.c

@@ -2749,7 +2749,7 @@ BOOL CALLBACK PasswordChangeDlgProc (HWND hwndDlg, UINT msg, WPARAM wParam, LPAR
 					int new_hash_algo_id = (int) SendMessage (GetDlgItem (hwndDlg, IDC_PKCS5_PRF_ID), CB_GETITEMDATA, 
 						SendMessage (GetDlgItem (hwndDlg, IDC_PKCS5_PRF_ID), CB_GETCURSEL, 0, 0), 0);
 
-					if (new_hash_algo_id != 0 && !bSystemIsGPT && !HashForSystemEncryption(new_hash_algo_id))
+					if (new_hash_algo_id != 0 && (!bSystemIsGPT && !HashForSystemEncryption(new_hash_algo_id)) || (new_hash_algo_id == ARGON2))
 					{
 						int new_hash_algo_id = DEFAULT_HASH_ALGORITHM_BOOT;
 						Info ("ALGO_NOT_SUPPORTED_FOR_SYS_ENCRYPTION", hwndDlg);
@@ -3094,7 +3094,7 @@ BOOL CALLBACK PasswordDlgProc (HWND hwndDlg, UINT msg, WPARAM wParam, LPARAM lPa
 
 			for (i = FIRST_PRF_ID; i <= LAST_PRF_ID; i++)
 			{
-				if (bSystemIsGPT || HashForSystemEncryption(i))
+				if ((bSystemIsGPT || HashForSystemEncryption(i)) && (i != ARGON2))
 				{
 					nIndex = (int) SendMessage (hComboBox, CB_ADDSTRING, 0, (LPARAM) get_pkcs5_prf_name(i));
 					SendMessage (hComboBox, CB_SETITEMDATA, nIndex, (LPARAM) i);