Class: VChainClient::BlockstackClient

Inherits:
Object
  • Object
show all
Defined in:
lib/vchain_client/blockstack_client.rb

Constant Summary collapse

MASTER_ECC_PUBLIC_KEY = 
"MFYwEAYHKoZIzj0CAQYFK4EEAAoDQgAEXGOuvJT5hb/bR5y/JADHxJEEaQzuJUzw
Xet0UYuBrILjHB9HcxFc+WwuCflIRWtRDsNfaY6Ra7j/cRYLeiocYA=="
@@recs_cache = 
{}
@@ecc_keys_cache = 
{}
@@rsa_keys_cache = 
{}

Instance Method Summary collapse

Constructor Details

#initialize(config) ⇒ BlockstackClient

Returns a new instance of BlockstackClient.



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# File 'lib/vchain_client/blockstack_client.rb', line 15

def initialize(config)
	@config = config

	@log = Log4r::Logger["vchain_client"]
end

Instance Method Details

#checkBlockstackRecord(blockstack_id, type) ⇒ Object 



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# File 'lib/vchain_client/blockstack_client.rb', line 96

def checkBlockstackRecord(blockstack_id, type)

	if @log.debug?
		@log.debug("[Blockstack.checkBlockstackRecord] input:")
		@log.debug("-> blockstack_id: #{blockstack_id}")
		@log.debug("-> type: #{type}")
	end

	record = nil

	begin
		
		record = self.getBlockstackRecord(blockstack_id)

	rescue => e

		if @log.error?
			@log.error("[Blockstack.checkBlockstackRecord] getBlockstackRecord raised exception:")
			@log.error("#{e.class}, #{e.message}")
			@log.error("-> blockstack_id: #{blockstack_id}")
			@log.error("-> type: #{type}")
			@log.error("--> blockstack_id: #{blockstack_id}")
		end

		raise e
	end

	if record == nil
		if @log.error?
			@log.error("[Blockstack.checkBlockstackRecord] failed to retrieve record")
			@log.error("-> blockstack_id: #{blockstack_id}")
			@log.error("-> type: #{type}")
			@log.error("--> blockstack_id: #{blockstack_id}")
		end

		return false
	end

	cryptoHelper = VChainClient::Crypto.new(@config)

	if @log.debug?
		@log.debug("[Blockstack.checkBlockstackRecord] Crypto initialized")
	end

	if record != nil

		if record.key?("ecc_pubkey")

			if record.key?("vchain_role")
				
				if record["vchain_role"] != type
  			if @log.error?
  				@log.error("[Blockstack.checkBlockstackRecord] type mismatch")
	  			@log.error("-> blockstack_id: #{blockstack_id}")
	  			@log.error("-> type: #{type}")
	  			@log.error("--> '"+ record["vchain_role"] +"'")
  			end	 

					return false
				end

				if !record.key?("validator_blockstack_id")
  			if @log.error?
  				@log.error("[Blockstack.checkBlockstackRecord] record doesn't have 'validator_blockstack_id' field")
	  			@log.error("-> blockstack_id: #{blockstack_id}")
	  			@log.error("-> type: #{type}")
  			end	 

					return false
				end

				validator_blockstack_id = record["validator_blockstack_id"]

  		if @log.debug?
  			@log.debug("[Blockstack.checkBlockstackRecord] record's vchain_role is '"+ record["vchain_role"] +"'")
  		end

				if record["vchain_role"] != 'validator'

	  		if @log.debug?
	  			@log.debug("[Blockstack.checkBlockstackRecord] going to check validator for #{blockstack_id}, validator_id: #{validator_blockstack_id}")
	  		end

	  		begin

						if !self.checkValidator(validator_blockstack_id)

		  			if @log.error?
		  				@log.error("[Blockstack.checkBlockstackRecord] failed to check validator")
			  			@log.error("-> blockstack_id: #{blockstack_id}")
			  			@log.error("-> type: #{type}")
			  			@log.error("--> validator_blockstack_id: #{validator_blockstack_id}")
		  			end	

							return false
						end

					rescue => e
		  		if @log.error?
		  			@log.error("[Blockstack.checkBlockstackRecord] checkValidator raised exception:")
		  			@log.error("#{e.class}, #{e.message}")
		  			@log.error("-> blockstack_id: #{blockstack_id}")
		  			@log.error("-> type: #{type}")
		  			@log.error("--> validator_blockstack_id: #{validator_blockstack_id}")
		  		end

						raise e
					end

				end

				validator_ecc_pub_key = nil
				if record["vchain_role"] != 'validator'

					begin
						
						validator_ecc_pub_key = self.getPublicKeyECC(validator_blockstack_id)

					rescue => e
		  		if @log.error?
		  			@log.error("[Blockstack.checkBlockstackRecord] getPublicKeyECC raised exception:")
		  			@log.error("#{e.class}, #{e.message}")
		  			@log.error("-> blockstack_id: #{blockstack_id}")
		  			@log.error("-> type: #{type}")
		  			@log.error("--> validator_blockstack_id: #{validator_blockstack_id}")
		  		end

						raise e
					end

				else
					validator_ecc_pub_key = MASTER_ECC_PUBLIC_KEY;
				end

				if validator_ecc_pub_key == nil
					if @log.error?
	  			@log.error("[Blockstack.checkBlockstackRecord] failed to retrieve public key:")
	  			@log.error("-> blockstack_id: #{blockstack_id}")
	  			@log.error("-> type: #{type}")
	  			@log.error("--> validator_blockstack_id: #{validator_blockstack_id}")
					end

					return false
				end

		# check client's sig version 1
		client_sig = record["client_sig"]

		validator_sig = record["validator_sig"]

		client_sig_to_check = record["vchain_id"] + record["vchain_role"] + blockstack_id + record["ecc_pubkey"] + record["sig_version"];

		validator_sig_to_check = record["vchain_id"] + record["vchain_role"] + blockstack_id + record["ecc_pubkey"] + record["sig_version"] + record["validator_vchain_id"] + validator_blockstack_id

		# client's sig versions 2 && 3
		if record["sig_version"] == "2" || record["sig_version"] == "3"

			# need to retrieve RSA key
			if !record.key?("rsa_pubkey")
	  			if @log.error?
	  				@log.error("[Blockstack.checkBlockstackRecord] record doesn't have 'rsa_pubkey' field")
		  			@log.error("-> blockstack_id: #{blockstack_id}")
		  			@log.error("-> type: #{type}")
	  			end

				return false
			end

			if record["sig_version"] == "2"
				# sig version 2

				client_sig = record["client_sig_v2"]

				validator_sig = record["validator_sig_v2"]

				client_sig_to_check = record["vchain_id"] + record["vchain_role"] + blockstack_id + record["ecc_pubkey"] + record["rsa_pubkey"] + record["sig_version"];

				validator_sig_to_check = record["vchain_id"] + record["vchain_role"] + blockstack_id + record["ecc_pubkey"].gsub(/\n/, "") + record["rsa_pubkey"].gsub(/\n/, "") + record["sig_version"] + record["validator_vchain_id"] + validator_blockstack_id

			elsif record["sig_version"] == "3"
				# sig version 3

				client_sig = record["client_sig_v3"]

				validator_sig = record["validator_sig_v3"]

				client_sig_to_check = record["vchain_id"] + record["vchain_role"] + blockstack_id + record["ecc_pubkey"].gsub(/\n/, "") + record["rsa_pubkey"].gsub(/\n/, "") + record["sig_version"];

				validator_sig_to_check = record["vchain_id"] + record["vchain_role"] + blockstack_id + record["ecc_pubkey"].gsub(/\n/, "") + record["rsa_pubkey"].gsub(/\n/, "") + record["sig_version"] + record["validator_vchain_id"] + validator_blockstack_id
			end
		end

		begin

			if cryptoHelper.verifySignature(client_sig_to_check, client_sig, record["ecc_pubkey"])
				
				# check validator's sig
				begin

					if cryptoHelper.verifySignature(validator_sig_to_check, validator_sig, validator_ecc_pub_key)
						
						return true;

					else
						if @log.error?
				  			@log.error("[Blockstack.checkBlockstackRecord] failed to verify validator_sig")
				  			@log.error("-> blockstack_id: #{blockstack_id}")
				  			@log.error("-> type: #{type}")
			  				@log.error("--> validator_sig_to_check: #{validator_sig_to_check}")
			  				@log.error("--> validator_sig: "+ Base64.encode64(record["validator_sig"]))
			  				@log.error("--> validator_ecc_pub_key: #{validator_ecc_pub_key}")
						end

						return false
					end

				rescue => e
					if @log.error?
			  			@log.error("[Blockstack.checkBlockstackRecord] verifySignature for validator_sig raised exception:")
			  			@log.error("#{e.class}, #{e.message}")
			  			@log.error("-> blockstack_id: #{blockstack_id}")
			  			@log.error("-> type: #{type}")
			  			@log.error("--> validator_sig_to_check: #{validator_sig_to_check}")
			  			@log.error("--> validator_sig: "+ Base64.encode64(record["validator_sig"]))
			  			@log.error("--> validator_ecc_pub_key: #{validator_ecc_pub_key}")
					end

					raise e
				end

			else
				if @log.error?
		  			@log.error("[Blockstack.checkBlockstackRecord] failed to verify client_sig")
		  			@log.error("-> blockstack_id: #{blockstack_id}")
		  			@log.error("-> type: #{type}")
	  				@log.error("--> client_sig_to_check: #{client_sig_to_check}")
	  				@log.error("--> client_sig: "+ Base64.encode64(record["client_sig"]))
	  				@log.error("--> ecc_pubkey: "+ record["ecc_pubkey"])
		  		end

				return false
			end

		rescue => e
			if @log.error?
	  			@log.error("[Blockstack.checkBlockstackRecord] verifySignature for client_sig raised exception:")
	  			@log.error("#{e.class}, #{e.message}")
	  			@log.error("-> blockstack_id: #{blockstack_id}")
	  			@log.error("-> type: #{type}")
	  			@log.error("--> client_sig_to_check: #{client_sig_to_check}")
	  			@log.error("--> client_sig: "+ Base64.encode64(record["client_sig"]))
	  			@log.error("--> ecc_pubkey: "+ record["ecc_pubkey"])
			end

			raise e
		end

			else 
 			if @log.error?
 				@log.error("[Blockstack.checkBlockstackRecord] record doesn't have 'vchain_role' field")
  			@log.error("-> blockstack_id: #{blockstack_id}")
  			@log.error("-> type: #{type}")
 			end	  					
			end

		else
			if @log.error?
				@log.error("[Blockstack.checkBlockstackRecord] record doesn't have 'ecc_pubkey' field")
 			@log.error("-> blockstack_id: #{blockstack_id}")
 			@log.error("-> type: #{type}")
			end
		end

	else
		if @log.error?
			@log.error("[Blockstack.checkBlockstackRecord] record is null")
			@log.error("-> blockstack_id: #{blockstack_id}")
			@log.error("-> type: #{type}")
		end
	end

	return false
end

#checkFederativeServer(federative_server_id) ⇒ Object 



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# File 'lib/vchain_client/blockstack_client.rb', line 21

def checkFederativeServer(federative_server_id)

	if @log.debug?
		@log.debug("[Blockstack.checkFederativeServer] input:")
		@log.debug("-> federative_server_id: #{federative_server_id}")
	end

	begin
		
		return self.checkBlockstackRecord(federative_server_id, 'federative_server')

	rescue => e

		if @log.error?
			@log.error("[Blockstack.checkFederativeServer] checkBlockstackRecord raised exception:")
			@log.error("#{e.class}, #{e.message}")
			@log.error("-> federative_server_id: #{federative_server_id}")
			@log.error("--> federative_server_id: #{federative_server_id}")
			@log.error("--> type: federative_server")
		end

		raise e
	end
end

#checkValidator(validator_id) ⇒ Object 



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# File 'lib/vchain_client/blockstack_client.rb', line 71

def checkValidator(validator_id)

	if @log.debug?
		@log.debug("[Blockstack.checkValidator] input:")
		@log.debug("-> validator_id: #{validator_id}")
	end

	begin
		
		return self.checkBlockstackRecord(validator_id, 'validator')

	rescue => e

		if @log.error?
			@log.error("[Blockstack.checkValidator] checkBlockstackRecord raised exception:")
			@log.error("#{e.class}, #{e.message}")
			@log.error("-> validator_id: #{validator_id}")
			@log.error("--> validator_id: #{validator_id}")
			@log.error("--> type: validator")
		end

		raise e
	end
end

#checkVerificator(verificator_id) ⇒ Object 



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# File 'lib/vchain_client/blockstack_client.rb', line 46

def checkVerificator(verificator_id)

	if @log.debug?
		@log.debug("[Blockstack.checkVerificator] input:")
		@log.debug("-> verificator_id: #{verificator_id}")
	end

	begin
		
		return self.checkBlockstackRecord(verificator_id, 'verificator')

	rescue => e

		if @log.error?
			@log.error("[Blockstack.checkVerificator] checkBlockstackRecord raised exception:")
			@log.error("#{e.class}, #{e.message}")
			@log.error("-> verificator_id: #{verificator_id}")
			@log.error("--> verificator_id: #{verificator_id}")
			@log.error("--> type: verificator")
		end

		raise e
	end
end

#getBlockstackRecord(blockstack_id, force_refresh = false) ⇒ Object 



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# File 'lib/vchain_client/blockstack_client.rb', line 508

def getBlockstackRecord(blockstack_id, force_refresh=false)

	if @log.debug?
		@log.debug("[Blockstack.getBlockstackRecord] input:")
		@log.debug("-> blockstack_id: #{blockstack_id}")
	end

	if !force_refresh
		if @@recs_cache.key?(blockstack_id)
 		if @log.debug?
 			@log.debug("[Blockstack.getBlockstackRecord] '#{blockstack_id}' is in a cache")
 		end

			return @@recs_cache[blockstack_id]
		end
	end

	blockstack_path = @config["blockstack"]["path"]

	cmd_init = blockstack_path +" set_advanced_mode on"

	cmd = blockstack_path +" get_name_zonefile "+ blockstack_id

	if @log.debug?
		@log.debug("[Blockstack.getBlockstackRecord] using '#{blockstack_path}' as a Blockstack path")
		@log.debug("[Blockstack.getBlockstackRecord] running '#{cmd}'")
	end

	ret = nil

	begin 

		`#{cmd_init}`

		ret = `#{cmd}`

	rescue => e
		if @log.error?
			@log.error("[Blockstack.getBlockstackRecord] cmd call '#{cmd}' raised exception:")
			@log.error("#{e.class}, #{e.message}")
			@log.error("-> blockstack_id: #{blockstack_id}")
			@log.error("--> '#{cmd}'")
		end

		raise e
	end

	if ret == nil
		if @log.error?
			@log.error("[Blockstack.getBlockstackRecord] failed to retrieve record from cmd call")
			@log.error("-> blockstack_id: #{blockstack_id}")
			@log.error("--> '#{cmd}'")
		end

		return nil
	end

	if @log.debug?
		@log.debug("[Blockstack.getBlockstackRecord] cmd call return:")
		@log.debug(ret)
	end

	ret = JSON.parse ret

	@log.debug(ret)

	lines = ret["zonefile"].split("\n")

	fz = {}

			lines.each { |line|

recs = line.split(" ")

if recs.size == 3
	if recs[0] == "A1" || recs[0] == "A2" || recs[0] == "A3" || recs[0] == "A4" || recs[0] == "A5" || recs[0] == "A6" || recs[0] == "A7" || recs[0] == "A8" || recs[0] == "A9" || recs[0] == "A10" || recs[0] == "A11"
		fz[recs[0]] = recs[2][1..-2]
	end
end
			}

	if @log.debug?
		@log.debug("[Blockstack.getBlockstackRecord] fz:")
		@log.debug(fz)
	end

	if fz.key?("A1") &&  fz.key?("A2") &&  fz.key?("A3") &&  fz.key?("A4") && fz.key?("A5") &&  fz.key?("A6") &&  fz.key?("A7") && fz.key?("A8")

		ecc_pubkey_aligned = fz["A1"]
		ecc_pubkey = ecc_pubkey_aligned[0..63] +"\n"+ ecc_pubkey_aligned[64..ecc_pubkey_aligned.length]

		rsa_pubkey = nil
		if fz["A7"] == "2" || fz["A7"] == "3"
			# sig versions 2 && 3

			if !fz.key?("A9")
 			if @log.error?
					@log.error("[Blockstack.getBlockstackRecord] no 'A9' field, sig ver is >1")
					@log.error("-> blockstack_id: #{blockstack_id}")
				end

				return nil
			end

			rsa_pubkey_aligned = fz["A9"]
			rsa_pubkey = rsa_pubkey_aligned[0..63] +"\n"+ rsa_pubkey_aligned[64..127] +"\n"+ rsa_pubkey_aligned[128..191] +"\n"+ rsa_pubkey_aligned[192..255] +"\n"+ rsa_pubkey_aligned[256..319] +"\n"+ rsa_pubkey_aligned[320..383] +"\n"+ rsa_pubkey_aligned[384..rsa_pubkey_aligned.length]
		end

		output = {
	"ecc_pubkey"              => ecc_pubkey,
	"rsa_pubkey"              => rsa_pubkey,
	"vchain_id"               => fz["A2"],
	"validator_sig"           => Base64.decode64(fz["A3"]),
	"validator_vchain_id"     => fz["A4"],
	"validator_blockstack_id" => fz["A5"],
	"vchain_role"             => fz["A6"],
	"sig_version"             => fz["A7"],
	"client_sig"              => Base64.decode64(fz["A8"])
		}

		if fz["A7"] == "2" || fz["A7"] == "3"
			# sig versions 2 && 3

			output["client_sig_v2"]    = Base64.decode64(fz["A8"])
			output["validator_sig_v2"] = Base64.decode64(fz["A3"])

			if fz["A7"] == "3"
				# sig version 3

				if !fz.key?("A10") || !fz.key?("A11")
  			if @log.error?
 					@log.error("[Blockstack.getBlockstackRecord] no 'A10' or 'A11' fields, sig ver = 3")
 					@log.error("-> blockstack_id: #{blockstack_id}")
 				end

 				return nil
				end

				output["client_sig_v3"]    = Base64.decode64(fz["A10"])
				output["validator_sig_v3"] = Base64.decode64(fz["A11"])

			end

		end

		if @log.debug?
			@log.debug("[Blockstack.getBlockstackRecord] output:")
			@log.debug(output)
		end

		@@recs_cache[blockstack_id] = output
		@@ecc_keys_cache[blockstack_id] = ecc_pubkey
		@@rsa_keys_cache[blockstack_id] = rsa_pubkey

		return output

	else
		if @log.error?
			@log.error("[Blockstack.getBlockstackRecord] no 'A*' field")
			@log.error("-> blockstack_id: #{blockstack_id}")
			@log.error("--> blockstack_id: #{blockstack_id}")
		end
	end

	return nil
end

#getPublicKeyECC(blockstack_id, force_refresh = false) ⇒ Object 



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# File 'lib/vchain_client/blockstack_client.rb', line 380

def getPublicKeyECC(blockstack_id, force_refresh=false)

	if @log.debug?
		@log.debug("[Blockstack.getPublicKeyECC] input:")
		@log.debug("-> blockstack_id: #{blockstack_id}")
	end

	if !force_refresh
		if @@ecc_keys_cache.key?(blockstack_id)

 		if @log.debug?
 			@log.debug("[Blockstack.getPublicKeyECC] '#{blockstack_id}' is in a cache")
 		end

			return @@ecc_keys_cache[blockstack_id]
		end
	end

	if @log.debug?
		@log.debug("[Blockstack.getPublicKeyECC] '#{blockstack_id}' is not in a cache yet")
	end

	begin

		record = self.getBlockstackRecord(blockstack_id, force_refresh);

		if record != nil
			
			if record.key?("ecc_pubkey")

				@@ecc_keys_cache[blockstack_id] = record["ecc_pubkey"]

				return record["ecc_pubkey"]

			else 
  		if @log.error?
  			@log.error("[Blockstack.getPublicKeyECC] record '#{blockstack_id}' doesn't have 'ecc_pubkey' field")
  			@log.error("-> blockstack_id: #{blockstack_id}")
  			@log.error("--> blockstack_id: #{blockstack_id}")
  		end
			end

		else
 		if @log.error?
 			@log.error("[Blockstack.getPublicKeyECC] failed to retrieve '#{blockstack_id}' record")
 			@log.error("-> blockstack_id: #{blockstack_id}")
 			@log.error("--> blockstack_id: #{blockstack_id}")
 		end
		end

	rescue => e
		if @log.error?
			@log.error("[Blockstack.getPublicKeyECC] getBlockstackRecord raised exception:")
			@log.error("#{e.class}, #{e.message}")
			@log.error("-> blockstack_id: #{blockstack_id}")
			@log.error("--> blockstack_id: #{blockstack_id}")
		end

		raise e
	end

	return nil
end

#getPublicKeyRSA(blockstack_id, force_refresh = false) ⇒ Object 



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# File 'lib/vchain_client/blockstack_client.rb', line 444

def getPublicKeyRSA(blockstack_id, force_refresh=false)

	if @log.debug?
		@log.debug("[Blockstack.getPublicKeyRSA] input:")
		@log.debug("-> blockstack_id: #{blockstack_id}")
	end

	if !force_refresh
		if @@rsa_keys_cache.key?(blockstack_id)

 		if @log.debug?
 			@log.debug("[Blockstack.getPublicKeyRSA] '#{blockstack_id}' is in a cache")
 		end

			return @@rsa_keys_cache[blockstack_id]
		end
	end

	if @log.debug?
		@log.debug("[Blockstack.getPublicKeyRSA] '#{blockstack_id}' is not in a cache yet")
	end

	begin

		record = self.getBlockstackRecord(blockstack_id, force_refresh);

		if record != nil
			
			if record.key?("rsa_pubkey")

				@@rsa_keys_cache[blockstack_id] = record["rsa_pubkey"]

				return record["rsa_pubkey"]

			else 
  		if @log.error?
  			@log.error("[Blockstack.getPublicKeyRSA] record '#{blockstack_id}' doesn't have 'rsa_pubkey' field")
  			@log.error("-> blockstack_id: #{blockstack_id}")
  			@log.error("--> blockstack_id: #{blockstack_id}")
  		end
			end

		else
 		if @log.error?
 			@log.error("[Blockstack.getPublicKeyRSA] failed to retrieve '#{blockstack_id}' record")
 			@log.error("-> blockstack_id: #{blockstack_id}")
 			@log.error("--> blockstack_id: #{blockstack_id}")
 		end
		end

	rescue => e
		if @log.error?
			@log.error("[Blockstack.getPublicKeyRSA] getBlockstackRecord raised exception:")
			@log.error("#{e.class}, #{e.message}")
			@log.error("-> blockstack_id: #{blockstack_id}")
			@log.error("--> blockstack_id: #{blockstack_id}")
		end

		raise e
	end

	return nil
end