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use /dev/random for crypto-grade RNG with the help of haveged

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Rather than pass `-r /dev/random` to ldns-keygen (it was `-r /dev/urandom`),
don't pass `-r` at all since /dev/random is the default.

Merges branch 'master' of github.com:pysiak/mailinabox
This commit is contained in:
Joshua Tauberer 2014-07-21 07:12:59 -04:00
commit 621fcc2233
3 changed files with 11 additions and 8 deletions
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11
setup/dns.sh
View File

@ -37,17 +37,16 @@ if [ ! -f "$STORAGE_ROOT/dns/dnssec/keys.conf" ]; then
# Create the Key-Signing Key (KSK) (-k) which is the so-called
# Secure Entry Point. Use a NSEC3-compatible algorithm (best
# practice), and a nice and long keylength. Use /dev/urandom
# instead of /dev/random for noise or else we'll be waiting
# a very long time. The domain name we provide ("_domain_")
# doesn't matter -- we'll use the same keys for all our domains.
KSK=$(umask 077; cd $STORAGE_ROOT/dns/dnssec; ldns-keygen -a RSASHA1-NSEC3-SHA1 -b 2048 -k -r /dev/urandom _domain_);
# practice), and a nice and long keylength. The domain name we
# provide ("_domain_") doesn't matter -- we'll use the same
# keys for all our domains.
KSK=$(umask 077; cd $STORAGE_ROOT/dns/dnssec; ldns-keygen -a RSASHA1-NSEC3-SHA1 -b 2048 -k _domain_);
# Now create a Zone-Signing Key (ZSK) which is expected to be
# rotated more often than a KSK, although we have no plans to
# rotate it (and doing so would be difficult to do without
# disturbing DNS availability.) Omit '-k' and use a shorter key.
ZSK=$(umask 077; cd $STORAGE_ROOT/dns/dnssec; ldns-keygen -a RSASHA1-NSEC3-SHA1 -b 1024 -r /dev/urandom _domain_);
ZSK=$(umask 077; cd $STORAGE_ROOT/dns/dnssec; ldns-keygen -a RSASHA1-NSEC3-SHA1 -b 1024 _domain_);
# These generate two sets of files like:
# K_domain_.+007+08882.ds <- DS record for adding to NSD configuration files

6
setup/system.sh
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@ -7,8 +7,12 @@ hide_output apt-get update
hide_output apt-get -y upgrade
# Install basic utilities.
#
# haveged: Provides extra entropy to /dev/random so it doesn't stall
# when generating random numbers for private keys (e.g. during
# ldns-keygen).
apt_install python3 python3-pip wget curl bind9-host
apt_install python3 python3-pip wget curl bind9-host haveged
# Turn on basic services:
#

2
setup/webmail.sh
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@ -36,7 +36,7 @@ if [ ! -d /usr/local/lib/roundcubemail ]; then
fi
# Generate a safe 24-character secret key of safe characters.
SECRET_KEY=$(dd if=/dev/urandom bs=20 count=1 2>/dev/null | base64 | fold -w 24 | head -n 1)
SECRET_KEY=$(dd if=/dev/random bs=20 count=1 2>/dev/null | base64 | fold -w 24 | head -n 1)
# Create a configuration file.
#