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--- clevis-18.ori/src/clevis.1.adoc 2021-04-15 13:00:19.965065700 +0200
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+++ clevis-18/src/clevis.1.adoc 2023-01-13 12:08:31.162012856 +0100
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@@ -101,7 +101,7 @@
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This command performs four steps:
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-1. Creates a new key with the same entropy as the LUKS master key.
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+1. Creates a new key with the same entropy as the LUKS master key -- maximum entropy bits is 256.
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2. Encrypts the new key with Clevis.
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3. Stores the Clevis JWE in the LUKS header.
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4. Enables the new key for use with LUKS.
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--- clevis-18.ori/src/luks/clevis-luks-bind.1.adoc 2023-01-13 12:02:52.005243591 +0100
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+++ clevis-18/src/luks/clevis-luks-bind.1.adoc 2023-01-13 12:08:05.873955501 +0100
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@@ -20,7 +20,7 @@
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This command performs four steps:
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-1. Creates a new key with the same entropy as the LUKS master key.
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+1. Creates a new key with the same entropy as the LUKS master key -- maximum entropy bits is 256.
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2. Encrypts the new key with Clevis.
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3. Stores the Clevis JWE in the LUKS header.
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4. Enables the new key for use with LUKS.
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--- clevis-18.ori/src/luks/clevis-luks-common-functions.in 2023-01-13 12:02:52.005243591 +0100
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+++ clevis-18/src/luks/clevis-luks-common-functions.in 2023-01-13 12:06:29.233736316 +0100
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@@ -875,6 +875,7 @@
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[ -z "${DEV}" ] && return 1
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local dump filter bits
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+ local MAX_ENTROPY_BITS=256 # Maximum allowed by pwmake.
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dump=$(cryptsetup luksDump "${DEV}")
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if cryptsetup isLuks --type luks1 "${DEV}"; then
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filter="$(echo "${dump}" | sed -rn 's|MK bits:[ \t]*([0-9]+)|\1|p')"
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@@ -886,6 +887,9 @@
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fi
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bits="$(echo -n "${filter}" | sort -n | tail -n 1)"
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+ if [ "${bits}" -gt "${MAX_ENTROPY_BITS}" ]; then
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+ bits="${MAX_ENTROPY_BITS}"
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+ fi
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pwmake "${bits}"
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}
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