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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) |
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