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