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17 lines
582 B
17 lines
582 B
1 week ago
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#!/bin/bash
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# Helper script for secp256k1 signing using pure shell commands
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PRIVATE_KEY_FILE="$1"
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MESSAGE_HASH_FILE="$2"
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# Load private key and message hash
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PRIVATE_KEY=$(cat "$PRIVATE_KEY_FILE" | xxd -p -c 64)
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MESSAGE_HASH=$(cat "$MESSAGE_HASH_FILE" | xxd -p -c 32)
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# Use secp256k1 library through Python (as a last resort)
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python3 -c "
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from coincurve import PrivateKey
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private_key = PrivateKey(bytes.fromhex('$PRIVATE_KEY'))
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signature = private_key.sign(bytes.fromhex('$MESSAGE_HASH'), hasher=None)
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print(signature.hex())
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" | xxd -r -p | base64 -w 0 | tr '/+' '_-' | tr -d '='
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