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manual updates for argon2

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Jaromil 2022-02-20 21:56:33 +01:00
parent 5c932b00fd
commit bcc6f03174
1 changed files with 27 additions and 18 deletions
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doc/tomb.1
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@ -39,19 +39,17 @@ with random data, decreasing the tomb's security.
.B
.IP "forge"
Creates a new \fIkey\fR and prompts the user for a \fIpassword\fR to
protect its usage using symmetric encryption. This operation uses
random data from a non-blocking source (/dev/urandom) and it may take
long only in some cases; to switch using a blocking source the
\fI--use-random\fR flag can be used. The \fI-g\fR option switches on
the use of a GPG key instead of a password (asymmetric encryption),
then the \fI-r\fR option indicates the recipient key; more recipient
GPG ids can be indicated (comma separated). The default cipher to
protect the key is AES256, a custom one can be specified using the
\fI-o\fR option, for a list of supported ciphers use \fI-v\fR. For
additional protection against dictionary attacks on keys, the
\fI--kdf\fR option can be used when forging a key, making sure that
the \fItomb-kdb-pbkdf2\fR binaries in \fIextras/kdf\fR were compiled
Creates a new \fIkey\fR and prompts the user for a \fIpassword\fR to protect
its usage using symmetric encryption. This operation uses random data from a
non-blocking source (/dev/urandom) and it may take long only in some cases; to
switch using a blocking source the \fI--use-random\fR flag can be used. The
\fI-g\fR option switches on the use of a GPG key instead of a password
(asymmetric encryption), then the \fI-r\fR option indicates the recipient key;
more recipient GPG ids can be indicated (comma separated). The default cipher
to protect the key is AES256, a custom one can be specified using the \fI-o\fR
option, for a list of supported ciphers use \fI-v\fR. For additional protection
against dictionary attacks on keys, the \fI--kdf\fR option can be used when
forging a key, making sure that the binaries in \fIextras/kdf\fR were compiled
and installed on the system.
.B
@ -269,11 +267,22 @@ can be one or more GPG key ID, comma separated. All GPG keys must be
trusted keys in GPG.
.B
.IP "--kdf \fI<itertime>\fR"
Activate the KDF feature against dictionary attacks when creating a
key: forces a delay of \fI<itertime>\fR times every time this key is
used. The actual time to wait depends on the CPU speed of the
computer where the key is used. Using 5 or 10 is a sane amount for
modern computers, the value is multiplied by 1 million.
Activate the KDF feature against dictionary attacks when creating a key: forces
a delay of \fI<itertime>\fR times every time this key is used. The actual time
to wait depends on the CPU speed (default) or the RAM size (argon2) of the
computer where the key is used. Using 5 or 10 is a sane amount for modern
computers, the value is multiplied by 1 million.
.B
.IP "--kdftype \fIargon2 | pbkdf2\fR"
Adopt the \fIargon2\fR algorithm for KDF, stressing the RAM capacity rather
than the CPU speed of the computer decrypting the tomb. Requires the
\fIargon2\fR binary by P-H-C to be installed, as packaged by most distros.
Default is \fIpbkdf2\fR.
.B
.IP "--kdfmem \fI<memory>\fR"
In case of \fIargon2\fR KDF algorithm, this value specifies the size of RAM
used: it consists of a number which is the elevated power of two in bytes.
Default is 18 which is 262 MiB (2^18 bytes).
.B
.IP "--sudo \fI<executable>\fR"
Select a different tool than sudo for privilege escalation.