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.Dd January 29, 2018 .Dt DECRYPTCORE 8 .Os .Sh NAME .Nm decryptcore .Nd "decrypt a core dump of the operating system" .Sh SYNOPSIS .Nm .Op Fl fLv .Fl p Ar privatekeyfile .Fl k Ar keyfile .Fl e Ar encryptedcore .Fl c Ar core .Nm .Op Fl fLv .Op Fl d Ar crashdir .Fl p Ar privatekeyfile .Fl n Ar dumpnr .Sh DESCRIPTION The .Nm utility first decrypts .Ar keyfile using .Ar privatekeyfile and then uses the resulting key to decrypt .Ar encryptedcore saved by .Xr savecore 8 . The result is saved in .Ar core .
p Alternatively a user can decrypt a core dump numbered .Ar dumpnr from the .Ar crashdir directory. In this case a dump key from the
a key.# file is used and the result is saved in the
a vmcore.# file where .Dq # corresponds to .Ar dumpnr .
p By default .Nm does not overwrite an old core dump as a user might want to store the core somewhere else for the future. This behaviour can be changed using the .Fl f flag.
p The .Nm utility can be started with the following command line arguments: l -tag -width ".Fl e Ar encryptedcore" t Fl f Remove a decryped core dump if it already exists. t Fl L Write log messages to .Xr syslogd 8 . t Fl v Print or log verbose/debugging information. This option can be specified multiple times to raise the verbosity level. t Fl p Ar privatekeyfile Specify location of a private key file which will be used to decrypt a dump key file. t Fl k Ar keyfile Specify location of a dump key file. t Fl e Ar encryptedcore Specify location of an encrypted core. t Fl c Ar core Specify location of a resulting decrypted core dump. t Fl d Ar crashdir Specify an alternative crash dump directory. The default crash dump directory is
a /var/crash . t Fl n Ar dumpnr Specify a number of a crash dump to be decrypted. .El .Sh EXIT STATUS .Ex -std .Sh SEE ALSO .Xr kgdb 1 Pq Pa ports/devel/gdb , .Xr capsicum 4 , .Xr dumpon 8 , .Xr savecore 8 , .Xr syslogd 8 .Sh AUTHORS The .Nm utility was implemented by .An Konrad Witaszczyk Aq Mt def@FreeBSD.org .