kopia lustrzana https://github.com/weetmuts/wmbusmeters
43 wiersze
1.2 KiB
Bash
Executable File
43 wiersze
1.2 KiB
Bash
Executable File
#!/bin/bash
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if [ $# -lt 2 ]; then
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echo "Usage: $0 [password] [kem(2)_file]"
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exit 1
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fi
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password="$1"
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file="$2"
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if unzip -v "$file" > /dev/null 2>&1
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then
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rm -rf temp_extracting_kem
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mkdir temp_extracting_kem
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unzip -d temp_extracting_kem "$file"
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file=$(echo temp_extracting_kem/*.kem)
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if [ ! -f "$file" ]; then file=$(echo temp_extracting_kem/*.kem2) ; fi
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echo "Extracting from $file"
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echo
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fi
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# The key is the supplied password as raw bytes padded with zero bytes.
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# The key is also used as the iv.
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key=$(echo -n "$password" | xxd -p)
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key=$(printf "%-32s" "$key" | tr ' ' '0')
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echo "KEY=>$key<"
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xml=$(cat "$file")
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# Extract the Base64-encoded ciphertext from the XML
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b64=$(echo "$xml" | sed -n 's/.*<CipherValue>\(.*\)<\/CipherValue>.*/\1/p' > gurka)
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echo BASE64="$b64"
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# Decrypt the ciphertext using the key and IV
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plain=$(echo "$b64" | base64 -d | openssl enc -aes-128-cbc -d -K "$key" -iv "$key" -nopad)
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# Extract the id and key from the decrypted XML
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meter_key=$(echo "$plain" | sed -n 's/.*<DEK>\(.*\)<\/DEK>.*/\1/p')
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meter_id=$(echo "$plain" | sed -n 's/.*<SerialNo>\(.*\)<\/SerialNo>.*/\1/p')
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echo "id=$meter_id"
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echo "key=$meter_key"
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