class BitPay::KeyUtils
Public Class Methods
create_key(pem)
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# File lib/bitpay/key_utils.rb, line 20 def create_key pem OpenSSL::PKey::EC.new(pem) end
create_new_key()
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# File lib/bitpay/key_utils.rb, line 24 def create_new_key key = OpenSSL::PKey::EC.new("secp256k1") key.generate_key key end
generate_pem()
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# File lib/bitpay/key_utils.rb, line 14 def generate_pem key = OpenSSL::PKey::EC.new("secp256k1") key.generate_key key.to_pem end
generate_sin_from_pem(pem)
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# File lib/bitpay/key_utils.rb, line 51 def generate_sin_from_pem pem #http://blog.bitpay.com/2014/07/01/bitauth-for-decentralized-authentication.html #https://en.bitcoin.it/wiki/Identity_protocol_v1 # NOTE: All Digests are calculated against the binary representation, # hence the requirement to use [].pack("H*") to convert to binary for each step #Generate Private Key key = OpenSSL::PKey::EC.new pem key.public_key.group.point_conversion_form = :compressed public_key = key.public_key.to_bn.to_s(2) step_one = Digest::SHA256.hexdigest(public_key) step_two = Digest::RMD160.hexdigest([step_one].pack("H*")) step_three = "0F02" + step_two step_four_a = Digest::SHA256.hexdigest([step_three].pack("H*")) step_four = Digest::SHA256.hexdigest([step_four_a].pack("H*")) step_five = step_four[0..7] step_six = step_three + step_five encode_base58(step_six) end
get_private_key(key)
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# File lib/bitpay/key_utils.rb, line 30 def get_private_key key key.private_key.to_int.to_s(16) end
get_private_key_from_pem(pem)
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# File lib/bitpay/key_utils.rb, line 39 def get_private_key_from_pem pem raise BitPayError, MISSING_PEM unless pem key = OpenSSL::PKey::EC.new(pem) get_private_key key end
get_public_key(key)
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# File lib/bitpay/key_utils.rb, line 34 def get_public_key key key.public_key.group.point_conversion_form = :compressed key.public_key.to_bn.to_s(16).downcase end
get_public_key_from_pem(pem)
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# File lib/bitpay/key_utils.rb, line 45 def get_public_key_from_pem pem raise BitPayError, MISSING_PEM unless pem key = OpenSSL::PKey::EC.new(pem) get_public_key key end
sign(message, privkey)
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Generate ECDSA signature This is the last method that requires the ecdsa gem, which we would like to replace
# File lib/bitpay/key_utils.rb, line 76 def sign(message, privkey) group = ECDSA::Group::Secp256k1 digest = Digest::SHA256.digest(message) signature = nil while signature.nil? temp_key = 1 + SecureRandom.random_number(group.order - 1) signature = ECDSA.sign(group, privkey.to_i(16), digest, temp_key) return ECDSA::Format::SignatureDerString.encode(signature).unpack("H*").first end end
sign_with_pem(pem, message)
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# File lib/bitpay/key_utils.rb, line 87 def sign_with_pem pem, message priv = get_private_key_from_pem pem sign(message, priv) end
Private Class Methods
encode_base58(data)
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Base58 Encoding Method
# File lib/bitpay/key_utils.rb, line 97 def encode_base58 (data) code_string = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz" base = 58 x = data.hex output_string = "" while x > 0 do remainder = x % base x = x / base output_string << code_string[remainder] end pos = 0 while data[pos,2] == "00" do output_string << code_string[0] pos += 2 end output_string.reverse() end