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36 lines
1.2 KiB
JavaScript
36 lines
1.2 KiB
JavaScript
'use strict';
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// ecsign (messageHash, privateKey) -> {r, s, v}
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// ecrecover (messageHash, v, r, s) -> publicKey
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// sha3 (message, bits) -> messageHash
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// privateToPublic (privateKey) -> publicKey
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const crypto = require("crypto");
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const ethereumUtil = require("ethereumjs-util");
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let privateKey = crypto.randomBytes(32);
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let publicKey = ethereumUtil.privateToPublic(privateKey);
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console.log("-- Key data:");
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console.log("Private key: (hex)", privateKey.toString("hex"));
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console.log("Public key: (hex)", publicKey.toString("hex"));
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let message = "hello world!";
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let messageHash = ethereumUtil.sha3(message);
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console.log("-- Message:");
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console.log("Plaintext:", message);
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console.log("Hash: (hex)", messageHash.toString("hex"));
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let signature = ethereumUtil.ecsign(messageHash, privateKey);
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let recoveredPublicKey = ethereumUtil.ecrecover(messageHash, signature.v, signature.r, signature.s);
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console.log("-- Signing:");
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console.log("Signature:");
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console.log(" v:", signature.v);
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console.log(" r: (hex)", signature.r.toString("hex"));
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console.log(" s: (hex)", signature.s.toString("hex"));
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console.log("Recovered public key: (hex)", recoveredPublicKey.toString("hex"));
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console.log("\nPublic keys match:", (publicKey.compare(recoveredPublicKey) === 0));
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