58 lines
1.2 KiB
Bash
Executable file
58 lines
1.2 KiB
Bash
Executable file
#!/bin/sh
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# Demo git-annex external backend program.
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#
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# Install in PATH as git-annex-backend-XFOO
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#
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# Copyright 2020 Joey Hess; licenced under the GNU GPL version 3 or higher.
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set -e
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hashfile () {
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local contentfile="$1"
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# could send PROGRESS while doing this, but it's
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# hard to implement that in shell
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md5sum "$contentfile" | cut -d ' ' -f 1 || echo ''
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}
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while read line; do
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set -- $line
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case "$1" in
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GETVERSION)
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echo VERSION 1
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;;
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CANVERIFY)
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echo CANVERIFY-YES
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;;
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ISSTABLE)
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echo ISSTABLE-YES
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;;
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ISCRYPTOGRAPHICALLYSECURE)
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# md5 is not cryptographically secure
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echo ISCRYPTOGRAPHICALLYSECURE-NO
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;;
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GENKEY)
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contentfile="$2"
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hash=$(hashfile "$contentfile")
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sz=$(wc -c "$contentfile" | cut -d ' ' -f 1)
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if [ -n "$hash" ]; then
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echo "GENKEY-SUCCESS" "XFOO-s$sz--$hash"
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else
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echo "GENKEY-FAILURE" "md5sum failed"
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fi
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;;
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VERIFYKEYCONTENT)
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key="$2"
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contentfile="$3"
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hash=$(hashfile "$contentfile")
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khash=$(echo "$key" | sed 's/.*--//')
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if [ "$hash" = "$khash" ]; then
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echo "VERIFYKEYCONTENT-SUCCESS"
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else
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echo "VERIFYKEYCONTENT-FAILURE"
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fi
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;;
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*)
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echo ERROR protocol error
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;;
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esac
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done
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