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Add key management system

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This adds a key management system that stores (currently) two data
encryption keys of length 128, 192, or 256 bits.  The data keys are
AES256 encrypted using a key encryption key, and validated via GCM
cipher mode.  A command to obtain the key encryption key must be
specified at initdb time, and will be run at every database server
start.  New parameters allow a file descriptor open to the terminal to
be passed.  pg_upgrade support has also been added.

Discussion: https://postgr.es/m/CA+fd4k7q5o6Nc_AaX6BcYM9yqTbC6_pnH-6nSD=54Zp6NBQTCQ@mail.gmail.com
Discussion: https://postgr.es/m/20201202213814.GG20285@momjian.us

Author: Masahiko Sawada, me, Stephen Frost
This commit is contained in:
Bruce Momjian
2020-12-25 10:19:44 -05:00
parent 5c31afc49d
commit 978f869b99
49 changed files with 2091 additions and 35 deletions
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13
doc/src/sgml/ref/postgres-ref.sgml
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@ -297,6 +297,19 @@ PostgreSQL documentation
</listitem>
</varlistentry>
<varlistentry>
<term><option>-R <replaceable class="parameter">file-descriptor</replaceable></option></term>
<listitem>
<para>
Makes <command>postgres</command> prompt for a passphrase or PIN
from the specified open numeric file descriptor. The descriptor
is closed after the key is read. The file descriptor number
<literal>-1</literal> duplicates standard error for the terminal;
this is useful for single-user mode.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-s</option></term>
<listitem>