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| author | Mounir IDRASSI <mounir.idrassi@idrix.fr> | 2014-07-27 02:36:23 +0200 |
|---|---|---|
| committer | Mounir IDRASSI <mounir.idrassi@idrix.fr> | 2014-11-08 23:21:43 +0100 |
| commit | 1c11ee428d9e06be1440133f6d1163ce6c709410 (patch) | |
| tree | d593910f3e6e3d2441bfd4bfe25d6e58c508a0b0 /src/Common/BootEncryption.cpp | |
| parent | 97154aaf51efe787dd1678c8e1baeeb65ce46fe1 (diff) | |
| download | VeraCrypt-1c11ee428d9e06be1440133f6d1163ce6c709410.tar.gz VeraCrypt-1c11ee428d9e06be1440133f6d1163ce6c709410.zip | |
Add option in select the number of passes for volume header over-writing. By default, it is set to 3 but it can be increased to 256 passes (which can lead to a delay of many hours for a single password change operation).
Diffstat (limited to 'src/Common/BootEncryption.cpp')
| -rw-r--r-- | src/Common/BootEncryption.cpp | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/src/Common/BootEncryption.cpp b/src/Common/BootEncryption.cpp index 0fec2878..e57a434e 100644 --- a/src/Common/BootEncryption.cpp +++ b/src/Common/BootEncryption.cpp @@ -2060,7 +2060,7 @@ namespace VeraCrypt }
- int BootEncryption::ChangePassword (Password *oldPassword, Password *newPassword, int pkcs5)
+ int BootEncryption::ChangePassword (Password *oldPassword, Password *newPassword, int pkcs5, int wipePassCount)
{
BootEncryptionStatus encStatus = GetStatus();
@@ -2125,7 +2125,7 @@ namespace VeraCrypt UserEnrichRandomPool (ParentWindow);
WaitCursor();
- /* The header will be re-encrypted PRAND_DISK_WIPE_PASSES times to prevent adversaries from using
+ /* The header will be re-encrypted wipePassCount times to prevent adversaries from using
techniques such as magnetic force microscopy or magnetic force scanning tunnelling microscopy
to recover the overwritten header. According to Peter Gutmann, data should be overwritten 22
times (ideally, 35 times) using non-random patterns and pseudorandom data. However, as users might
@@ -2145,7 +2145,7 @@ namespace VeraCrypt BOOL backupHeader = FALSE;
while (TRUE)
{
- for (int wipePass = 0; wipePass < PRAND_DISK_WIPE_PASSES; wipePass++)
+ for (int wipePass = 0; wipePass < wipePassCount; wipePass++)
{
PCRYPTO_INFO tmpCryptoInfo = NULL;
@@ -2164,7 +2164,7 @@ namespace VeraCrypt cryptoInfo->RequiredProgramVersion,
cryptoInfo->HeaderFlags | TC_HEADER_FLAG_ENCRYPTED_SYSTEM,
cryptoInfo->SectorSize,
- wipePass < PRAND_DISK_WIPE_PASSES - 1);
+ wipePass < wipePassCount - 1);
if (tmpCryptoInfo)
crypto_close (tmpCryptoInfo);
|