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ECDSA usage from Ruby.
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| require 'openssl' | |
| require 'base64' | |
| # ===== \/ sign ===== | |
| # generate keys | |
| key = OpenSSL::PKey::EC.new("secp256k1") | |
| key.generate_key | |
| public_key = key.public_key | |
| public_key_hex = public_key.to_bn.to_s(16).downcase # public key in hex format | |
| # sign a message | |
| data = "My message to sign" | |
| signature = key.dsa_sign_asn1(data) | |
| signature_base64 = Base64.encode64(signature).gsub("\n", "") | |
| # ===== \/ verify ===== | |
| # rebuild key | |
| group = OpenSSL::PKey::EC::Group.new('secp256k1') | |
| key = OpenSSL::PKey::EC.new(group) | |
| # create point from hex key | |
| public_key_bn = OpenSSL::BN.new(public_key_hex, 16) | |
| public_key = OpenSSL::PKey::EC::Point.new(group, public_key_bn) | |
| key.public_key = public_key | |
| # verify message | |
| data = "My message to sign" | |
| signature = Base64.decode64(signature_base64) | |
| key.dsa_verify_asn1(data, signature) |
If you are getting an error about immutability, use the following
key = OpenSSL::PKey::EC.generate("secp256k1")instead of
key = OpenSSL::PKey::EC.new("secp256k1") # IT'S WRONG FOR OPENSSL 3
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Hi, do you have version of this script for openssl version 3.0 & above? Because the keys are not mutable since 3.0 & above and will give this error.