mirror of
https://github.com/danog/termux-api-package.git
synced 2024-12-12 09:09:49 +01:00
127 lines
4.1 KiB
Plaintext
127 lines
4.1 KiB
Plaintext
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#!/data/data/com.termux/files/usr/bin/sh
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set -e -u
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readonly CMD_BASE="/data/data/com.termux/files/usr/libexec/termux-api Keystore"
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SCRIPTNAME=termux-keystore
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show_usage () {
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echo "Usage: $SCRIPTNAME command"
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echo "These commands are supported:"
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echo " list [-d]"
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echo " delete <alias>"
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echo " generate <alias> [-a alg] [-s size] [-u validity]"
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echo " sign <alias> <algorithm>"
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echo " verify <alias> <algorithm> <signature>"
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echo
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echo "list: List the keys stored inside the keystore."
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echo " -d Detailed results (includes key parameters)."
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echo
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echo "delete: Permanently delete a given key from the keystore."
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echo " alias Alias of the key to delete."
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echo
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echo "generate: Create a new key inside the hardware keystore."
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echo " alias Alias of the key."
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echo " -a alg Algorithm to use (either 'RSA' or 'EC'). Defaults to RSA."
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echo " -s size Key size to use. For RSA, the options are 2048, 3072"
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echo " and 4096. For EC, the options are 256, 384 and 521."
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echo " -u validity User validity duration in seconds. Omit to disable."
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echo " When enabled, the key can only be used for the"
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echo " duration specified after the device unlocks. After"
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echo " the duration has passed, the user needs to re-lock"
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echo " and unlock the device again to be able to use this key."
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echo
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echo "sign: Sign using the given key, the data is read from stdin and the"
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echo "signature is output to stdout."
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echo " alias Alias of the key to use for signing."
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echo " algorithm Algorithm to use, e.g. 'SHA256withRSA'. This should"
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echo " match the algorithm of the key."
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echo
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echo "verify: Verify a signature. The data (original file) is read from stdin."
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echo " alias Alias of the key to use for verify."
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echo " algorithm Algorithm that was used to sign this data."
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echo " signature Signature file to use in verification."
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}
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check_args () {
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if [ "$2" != "$3" ]; then
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echo "$SCRIPTNAME: $1 needs exactly $2 arguments"
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exit 1
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fi
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}
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list_keys () {
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if [ "$#" -gt 0 ] && [ "$1" = "-d" ]; then
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$CMD_BASE -e command list --ez detailed true
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else
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$CMD_BASE -e command list
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fi
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}
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delete_key () {
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check_args delete 1 $#
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$CMD_BASE -e command delete -e alias "$1"
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}
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sign_data () {
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check_args sign 2 $#
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$CMD_BASE -e command sign -e alias "$1" -e algorithm "$2" | base64 -d
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}
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verify_data () {
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check_args verify 3 $#
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$CMD_BASE -e command verify -e alias "$1" -e algorithm "$2" \
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-e signature "$(realpath "$3")"
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}
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generate_key () {
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if [ $# -lt 1 ]; then
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echo "$SCRIPTNAME generate: alias argument is required"
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exit 1
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fi
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ALIAS=$1; shift
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ALGORITHM=RSA; SIZE=-1; CURVE=secp256r1; VALIDITY=0
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while getopts a:s:c:u: NAME; do
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case "$NAME" in
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a) ALGORITHM=$OPTARG ;;
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s) SIZE=$OPTARG ;;
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u) VALIDITY=$OPTARG ;;
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?) ;;
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esac
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done
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if [ "$ALGORITHM" = "RSA" ]; then
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case "$SIZE" in
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-1) SIZE=2048 ;;
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2048|3072|4096) ;;
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*) echo "$SCRIPTNAME: invalid RSA key size $SIZE"; exit 1 ;;
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esac
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elif [ "$ALGORITHM" = "EC" ]; then
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case "$SIZE" in
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-1|256) CURVE=secp256r1 ;;
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384) CURVE=secp384r1 ;;
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521) CURVE=secp521r1 ;;
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*) echo "$SCRIPTNAME: invalid EC key size $SIZE"; exit 1 ;;
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esac
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else
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echo "$SCRIPTNAME: invalid algorithm $ALGORITHM"; exit 1
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fi
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# purpose 12 is SIGN+VERIFY
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$CMD_BASE -e command generate -e alias "$ALIAS" -e algorithm "$ALGORITHM" \
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--ei purposes 12 --esa digests SHA-1,SHA-256,SHA-384,SHA-512 \
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--ei size "$SIZE" -e curve "$CURVE" --ei validity "$VALIDITY"
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}
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ACTION="${1-}"
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if [ "$#" -gt 0 ]; then shift; fi
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case "$ACTION" in
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list) list_keys "$@" ;;
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generate) generate_key "$@" ;;
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delete) delete_key "$@" ;;
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sign) sign_data "$@" ;;
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verify) verify_data "$@" ;;
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*) show_usage ;;
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esac
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