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56 lines
1.7 KiB
Bash
56 lines
1.7 KiB
Bash
#!/bin/bash
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set -eu
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gpg2 --version >/dev/null # verify that GnuPG 2 is installed
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USER_ID="${1}"
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DEVICE=${DEVICE:="trezor"} # or "ledger"
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CURVE=${CURVE:="nist256p1"} # or "ed25519"
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TIMESTAMP=${TIMESTAMP:=`date +%s`} # key creation timestamp
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HOMEDIR=~/.gnupg/${DEVICE}
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# Prepare new GPG home directory for hardware-based identity
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rm -rf "${HOMEDIR}"
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mkdir -p "${HOMEDIR}"
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chmod 700 "${HOMEDIR}"
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# Generate new GPG identity and import into GPG keyring
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$DEVICE-gpg create -v "${USER_ID}" -t "${TIMESTAMP}" -e "${CURVE}" > "${HOMEDIR}/pubkey.asc"
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gpg2 --homedir "${HOMEDIR}" --import < "${HOMEDIR}/pubkey.asc" 2> /dev/null
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rm -f "${HOMEDIR}/S.gpg-agent" # (otherwise, our agent won't be started automatically)
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# Make new GPG identity with "ultimate" trust (via its fingerprint)
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FINGERPRINT=$(gpg2 --homedir "${HOMEDIR}" --list-public-keys --with-fingerprint --with-colons | sed -n -E 's/^fpr:::::::::([0-9A-F]+):$/\1/p' | head -n1)
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echo "${FINGERPRINT}:6" | gpg2 --homedir "${HOMEDIR}" --import-ownertrust 2> /dev/null
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AGENT_PATH="$(which ${DEVICE}-gpg-agent)"
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# Prepare GPG configuration file
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echo "# Hardware-based GPG configuration
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agent-program ${AGENT_PATH}
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personal-digest-preferences SHA512
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" > "${HOMEDIR}/gpg.conf"
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# Prepare GPG agent configuration file
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echo "# Hardware-based GPG agent emulator
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log-file ${HOMEDIR}/gpg-agent.log
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verbosity 2
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" > "${HOMEDIR}/gpg-agent.conf"
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# Prepare a helper script for setting up the new identity
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echo "#!/bin/bash
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set -eu
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export GNUPGHOME=${HOMEDIR}
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COMMAND=\$*
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if [ -z \"\${COMMAND}\" ]
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then
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\${SHELL}
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else
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\${COMMAND}
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fi
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" > "${HOMEDIR}/env"
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chmod u+x "${HOMEDIR}/env"
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# Load agent and make sure it responds with the new identity
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GNUPGHOME="$HOMEDIR" gpg2 -K 2> /dev/null
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