Class: VChainClient::Crypto

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

Constant Summary collapse

@@ecc_private_key = 
nil
@@ec_ecc_private = 
nil
@@rsa_private_key = 
nil
@@ec_rsa_private = 
nil
@@vchain_rsa_public_key = 
nil

Instance Method Summary collapse

Constructor Details

#initialize(config) ⇒ Crypto 



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# File 'lib/vchain_client/crypto.rb', line 16

def initialize(config)
  @config = config

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

Instance Method Details

#checkTreeSignature(tree_root_hash, blockchain_txid, blockchain_block_hash, blockchain_timestamp, blockstack_client_id, sig_version, signature, pubkey) ⇒ Object 



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# File 'lib/vchain_client/crypto.rb', line 747

def checkTreeSignature(tree_root_hash, blockchain_txid, blockchain_block_hash, blockchain_timestamp, blockstack_client_id, sig_version, signature, pubkey)

 what_to_check = tree_root_hash
 what_to_check += blockchain_txid
 what_to_check += blockchain_block_hash
 what_to_check += blockchain_timestamp.to_s
 what_to_check += blockstack_client_id
 what_to_check += sig_version

      if @log.debug?
        @log.debug("[Crypto.checkTreeSignature] input:")
    @log.debug("-> tree_root_hash: #{tree_root_hash}")
    @log.debug("-> blockchain_txid: #{blockchain_txid}")
    @log.debug("-> blockchain_block_hash: #{blockchain_block_hash}")
    @log.debug("-> blockchain_timestamp: #{blockchain_timestamp}")
    @log.debug("-> blockstack_client_id: #{blockstack_client_id}")
    @log.debug("-> sig_version: #{sig_version}")
    @log.debug("-> signature: "+ Base64.encode64(signature))
    @log.debug("-> pubkey: #{pubkey}")
      end

 begin 
  
  return self.verifySignature(what_to_check, signature, pubkey)

 rescue => e
  if @log.error?
    @log.error("[Crypto.checkTreeSignature] verifySignature raised exception:")
    @log.error("#{e.class}, #{e.message}")
    @log.error("-> tree_root_hash: #{tree_root_hash}")
    @log.error("-> blockchain_txid: #{blockchain_txid}")
    @log.error("-> blockchain_block_hash: #{blockchain_block_hash}")
    @log.error("-> blockchain_timestamp: #{blockchain_timestamp}")
    @log.error("-> blockstack_client_id: #{blockstack_client_id}")
    @log.error("-> sig_version: #{sig_version}")
    @log.error("-> signature: "+ Base64.encode64(signature))
    @log.error("-> pubkey: #{pubkey}")
    @log.error("--> what_to_check: #{what_to_check}")
    @log.error("--> signature: "+ Base64.encode64(signature))
    @log.error("--> pubkey: #{pubkey}")
  end

  raise e
 end
end

#checkVerificationSignature(field_hash, data_hash, doc_hash, credentials_hash, verification_type, weight, timestamp, blockstack_client_id, pubkey, signature, version) ⇒ Object 



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# File 'lib/vchain_client/crypto.rb', line 793

def checkVerificationSignature(field_hash, data_hash, doc_hash, credentials_hash, verification_type, weight, timestamp, blockstack_client_id, pubkey, signature, version)

      if @log.debug?
        @log.debug("[Crypto.checkVerificationSignature] input:")
    @log.debug("-> field_hash: #{field_hash}")
    @log.debug("-> data_hash: #{data_hash}")
    @log.debug("-> doc_hash: #{doc_hash}")
    @log.debug("-> credentials_hash: #{credentials_hash}")
    @log.debug("-> type: #{verification_type}")
    @log.debug("-> weight: "+ weight.to_s)
    @log.debug("-> timestamp: "+ timestamp.to_s)
    @log.debug("-> blockstack_client_id: #{blockstack_client_id}")
    @log.debug("-> signature: "+ Base64.encode64(signature))
    @log.debug("-> pubkey: #{pubkey}")
      end

      what_to_check = field_hash
      what_to_check += data_hash
      what_to_check += doc_hash
      what_to_check += credentials_hash
      what_to_check += verification_type
      what_to_check += weight.to_s
      what_to_check += timestamp.to_s
      what_to_check += blockstack_client_id
      what_to_check += version

      begin
      
        return self.verifySignature(what_to_check, signature, pubkey)

      rescue => e
  if @log.error?
    @log.error("[Crypto.checkVerificationSignature] verifySignature raised exception:")
    @log.error("#{e.class}, #{e.message}")
    @log.error("-> field_hash: #{field_hash}")
    @log.error("-> data_hash: #{data_hash}")
    @log.error("-> doc_hash: #{doc_hash}")
    @log.error("-> credentials_hash: #{credentials_hash}")
    @log.error("-> verification_type: #{verification_type}")
    @log.error("-> timestamp: "+ timestamp.to_s)
    @log.error("-> weight: "+ weight.to_s)
    @log.error("-> blockstack_client_id: #{blockstack_client_id}")
    @log.error("-> signature: "+ Base64.encode64(signature))
    @log.error("-> pubkey: #{pubkey}")
  end

  raise e
      end
end

#decodeCypher(encoded_payload, key, iv) ⇒ Object 



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# File 'lib/vchain_client/crypto.rb', line 152

def decodeCypher(encoded_payload, key, iv)

      cifd = OpenSSL::Cipher.new('AES-256-CTR')

      cifd.decrypt

      cifd.key = key
      cifd.iv  = iv

      decoded = ''
      decoded << cifd.update(encoded_payload)
      decoded << cifd.final

      return decoded
end

#decodeRSA(encoded_data) ⇒ Object 



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# File 'lib/vchain_client/crypto.rb', line 68

def decodeRSA(encoded_data)

      priv_key_path = @config["rsa_private_key_location"]

      if @log.debug?
        @log.debug("[Crypto.decodeRSA] input:")
        @log.debug("-> key path: #{priv_key_path}")
        @log.debug("-> input:")
        @log.debug(encoded_data)
      end

      if @@rsa_private_key == nil

        begin

@@rsa_private_key = File.read(priv_key_path)

        rescue => e
if @log.error?
  @log.error("[Crypto.decodeRSA] File.read raised exception:")
  @log.error("#{e.class}, #{e.message}")
  @log.error("--> priv_key_path: #{priv_key_path}")
  @log.error("-> input:")
  @log.error(encoded_data)
end

raise e
        end

        if @log.debug?
@log.debug("[Crypto.decodeRSA] priv key is loaded")
        end

      end

      if @@rsa_private_key == nil
        if @log.error?
@log.error("[Crypto.decodeRSA] failed to load private key")
@log.error("--> priv_key_path: #{priv_key_path}")
@log.error("-> input:")
@log.error(encoded_data)
        end

        return nil
      end

      if @@ec_rsa_private == nil

        begin

@@ec_rsa_private = OpenSSL::PKey::RSA.new(@@rsa_private_key)

        rescue => e
if @log.error?
  @log.error("[Crypto.decodeRSA] OpenSSL::PKey::EC.new raised exception:")
  @log.error("#{e.class}, #{e.message}")
  @log.error("--> priv_key_path: #{priv_key_path}")
  @log.error("-> input:")
  @log.error(encoded_data)
end

raise e
        end

        if @log.debug?
@log.debug("[Crypto.decodeRSA] key initialized")
        end

      end

      if @@ec_rsa_private == nil
        if @log.error?
@log.error("[Crypto.decodeRSA] failed init EC key")
@log.error("--> priv_key_path: #{priv_key_path}")
@log.error("-> input:")
@log.error(encoded_data)
        end

        return nil
      end

    return @@ec_rsa_private.private_decrypt(encoded_data, OpenSSL::PKey::RSA::PKCS1_OAEP_PADDING)
end

#encodeCypher(document) ⇒ Object 



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# File 'lib/vchain_client/crypto.rb', line 168

def encodeCypher(document)
      cif = OpenSSL::Cipher.new('AES-256-CTR')

      cif.encrypt

      cif.key = key = cif.random_key
      cif.iv  = iv  = cif.random_iv

      out = {
        "payload" => (cif.update(document) + cif.final),
        "key" => key,
        "iv" => iv
      }

      return out
end

#encodeRSA(payload) ⇒ Object 



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# File 'lib/vchain_client/crypto.rb', line 62

def encodeRSA(payload)
  vchain_public_key = self.getVChainPublicKeyRSA()

  return vchain_public_key.public_encrypt(payload, OpenSSL::PKey::RSA::PKCS1_OAEP_PADDING)
end

#getVChainPublicKeyRSA ⇒ Object 



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# File 'lib/vchain_client/crypto.rb', line 22

def getVChainPublicKeyRSA()

      if @@vchain_rsa_public_key != nil
        return @@vchain_rsa_public_key
      end

      blockstackClient = VChainClient::BlockstackClient.new(@config)

      vchain_public_key_body = nil

      begin

        vchain_public_key_body = blockstackClient.getPublicKeyRSA("vchain_core_01.id")

      rescue => e
        if @log.error?
 @log.error("[check] failed to retrieve vchain public RSA key from Blockstack")
 @log.error("#{e.class}, #{e.message}")
        end

        raise e
      end

      if vchain_public_key_body == nil
        if @log.error?
 @log.error("[check] failed to retrieve vchain public RSA key from Blockstack")
        end

        return false
      end

      vchain_public_key_str = "-----BEGIN PUBLIC KEY-----\n"
      vchain_public_key_str += vchain_public_key_body
      vchain_public_key_str += "\n-----END PUBLIC KEY-----"

      @@vchain_rsa_public_key = OpenSSL::PKey::RSA.new(vchain_public_key_str)

      return @@vchain_rsa_public_key
end

#signBatchRequest(batch, timestamp) ⇒ Object 



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# File 'lib/vchain_client/crypto.rb', line 185

def signBatchRequest(batch, timestamp)
      OpenSSL::PKey::EC.send(:alias_method, :private?, :private_key?)

      priv_key_path = @config["ecc_private_key_location"]

      if @log.debug?
        @log.debug("[Crypto.signBatchRequest] input:")
        @log.debug("-> timestamp: "+ timestamp.to_s)
        @log.debug("-> key path: #{priv_key_path}")
        @log.debug("-> input:")
        @log.debug(batch)
      end

      if @@ecc_private_key == nil

        begin

@@ecc_private_key = File.read(priv_key_path)

        rescue => e
if @log.error?
  @log.error("[Crypto.signBatchRequest] File.read raised exception:")
  @log.error("#{e.class}, #{e.message}")
  @log.error("-> timestamp: "+ timestamp.to_s)
  @log.error("--> priv_key_path: #{priv_key_path}")
  @log.error("-> input:")
  @log.error(batch)
end

raise e
        end

        if @log.debug?
@log.debug("[Crypto.signBatchRequest] priv key is loaded")
        end

      end

      if @@ecc_private_key == nil
        if @log.error?
@log.error("[Crypto.signBatchRequest] failed to load private key")
@log.error("-> timestamp: "+ timestamp.to_s)
@log.error("--> priv_key_path: #{priv_key_path}")
@log.error("-> input:")
@log.error(batch)
        end

        return nil
      end

      if @@ec_ecc_private == nil

        begin

@@ec_ecc_private = OpenSSL::PKey::EC.new(@@ecc_private_key)

        rescue => e
if @log.error?
  @log.error("[Crypto.signBatchRequest] OpenSSL::PKey::EC.new raised exception:")
  @log.error("#{e.class}, #{e.message}")
  @log.error("-> timestamp: "+ timestamp.to_s)
  @log.error("--> priv_key_path: #{priv_key_path}")
  @log.error("-> input:")
  @log.error(batch)
end

raise e
        end

        if @log.debug?
@log.debug("[Crypto.signBatchRequest] key initialized")
        end

      end

      if @@ec_ecc_private == nil
        if @log.error?
@log.error("[Crypto.signBatchRequest] failed init EC key")
@log.error("-> timestamp: "+ timestamp.to_s)
@log.error("--> priv_key_path: #{priv_key_path}")
@log.error("-> input:")
@log.error(batch)
        end

        return nil
      end

      digest = OpenSSL::Digest::SHA256.new

      whole_sign = ""

      batch.each { |batch_element|
        whole_sign += batch_element["data"].to_json 
        whole_sign += batch_element["point_type"]
        whole_sign += batch_element["weight"].to_s
        whole_sign += timestamp.to_s
      }

      if @log.debug?
        @log.debug("[Crypto.signBatchRequest] whole_to_sign: "+ whole_sign)
      end

      whole_signature = nil

      begin
        
        whole_signature = @@ec_ecc_private.sign(digest, whole_sign)

      rescue => e
        if @log.error?
@log.error("[Crypto.signBatchRequest] ec.sign raised exception:")
@log.error("#{e.class}, #{e.message}")
@log.error("-> timestamp: "+ timestamp.to_s)
@log.error("--> priv_key_path: #{priv_key_path}")
@log.error("--> whole_sign: #{whole_sign}")
@log.error("-> input:")
@log.error(batch)
        end

        raise e
      end

      if whole_signature == nil
        if @log.error?
@log.error("[Crypto.signBatchRequest] failed to sign")
@log.error("-> timestamp: "+ timestamp.to_s)
@log.error("--> priv_key_path: #{priv_key_path}")
@log.error("--> whole_sign: #{whole_sign}")
@log.error("-> input:")
@log.error(batch)
        end

        return nil
      end

      if @log.debug?
        @log.debug("[Crypto.signBatchRequest] whole_signature raw: "+ Base64.encode64(whole_signature))
      end

      return Base64.encode64(whole_signature).gsub(/\n/, "")
end

#signDataPoint(point_type, data, doc_hash, credentials_hash, weight, timestamp) ⇒ Object 



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# File 'lib/vchain_client/crypto.rb', line 536

def signDataPoint(point_type, data, doc_hash, credentials_hash, weight, timestamp)

  OpenSSL::PKey::EC.send(:alias_method, :private?, :private_key?)

  this_client_id = @config["blockstack"]["client_id"]
  priv_key_path = @config["ecc_private_key_location"]

      if @log.debug?
@log.debug("[Crypto.signDataPoint] input:")
@log.debug("-> this_client_id: #{this_client_id}")
@log.debug("-> doc_hash: #{doc_hash}")
@log.debug("-> credentials_hash: #{credentials_hash}")
@log.debug("-> weight: "+ weight.to_s)
@log.debug("-> timestamp: "+ timestamp.to_s)
@log.debug("-> point_type: #{point_type}")
@log.debug("-> key path: #{priv_key_path}")
@log.debug("-> data:")
@log.debug(data)
      end

      if @@ecc_private_key == nil

begin

  @@ecc_private_key = File.read(priv_key_path)

rescue => e
  if @log.error?
    @log.error("[Crypto.signDataPoint] File.read raised exception:")
    @log.error("#{e.class}, #{e.message}")
    @log.error("-> this_client_id: #{this_client_id}")
    @log.error("-> doc_hash: #{doc_hash}")
    @log.error("-> credentials_hash: #{credentials_hash}")
    @log.error("-> weight: "+ weight.to_s)
    @log.error("-> timestamp: "+ timestamp.to_s)
    @log.error("-> point_type: #{point_type}")
    @log.error("-> key path: #{priv_key_path}")
    @log.error("-> data:")
    @log.error(data)
  end

  raise e
end

if @log.debug?
  @log.debug("[Crypto.signDataPoint] priv key loaded")
end

      end

      if @@ecc_private_key == nil
if @log.error?
  @log.error("[Crypto.signDataPoint] failed to load private key")
  @log.error("-> this_client_id: #{this_client_id}")
  @log.error("-> doc_hash: #{doc_hash}")
  @log.error("-> credentials_hash: #{credentials_hash}")
  @log.error("-> weight: "+ weight.to_s)
  @log.error("-> timestamp: "+ timestamp.to_s)
  @log.error("-> point_type: #{point_type}")
  @log.error("-> key path: #{priv_key_path}")
  @log.error("-> data:")
  @log.error(data)
end

return nil
      end

      if @@ec_ecc_private == nil

begin
  
  @@ec_ecc_private = OpenSSL::PKey::EC.new(@@ecc_private_key)

rescue => e
  if @log.error?
    @log.error("[Crypto.signDataPoint] OpenSSL::PKey::EC.new raised exception:")
    @log.error("#{e.class}, #{e.message}")
    @log.error("-> this_client_id: #{this_client_id}")
    @log.error("-> doc_hash: #{doc_hash}")
    @log.error("-> credentials_hash: #{credentials_hash}")
    @log.error("-> weight: "+ weight.to_s)
    @log.error("-> timestamp: "+ timestamp.to_s)
    @log.error("-> point_type: #{point_type}")
    @log.error("-> key path: #{priv_key_path}")
    @log.error("-> data:")
    @log.error(data)
    @log.error("--> priv_key_path: #{priv_key_path}")
  end

  raise e
end

if @log.debug?
  @log.debug("[Crypto.signDataPoint] key created")
end

      end

      if @@ec_ecc_private == nil
if @log.error?
  @log.error("[Crypto.signDataPoint] failed init EC key")
  @log.error("-> this_client_id: #{this_client_id}")
  @log.error("-> doc_hash: #{doc_hash}")
  @log.error("-> credentials_hash: #{credentials_hash}")
  @log.error("-> weight: "+ weight.to_s)
  @log.error("-> timestamp: "+ timestamp.to_s)
  @log.error("-> point_type: #{point_type}")
  @log.error("-> key path: #{priv_key_path}")
  @log.error("-> data:")
  @log.error(data)
  @log.error("--> priv_key_path: #{priv_key_path}")
end

return nil
      end

      digest = OpenSSL::Digest::SHA256.new

  output = {}

  data.each{ |rec|
    field = rec[0]
    value = rec[1]

    if @log.debug?
      @log.debug("[Crypto.signDataPoint] field: #{field}, value: #{value}")
    end

    if field != 'client_id'

      field_hash = Digest::SHA512.hexdigest(field)

      value_hash = Digest::SHA512.hexdigest(value)

      what_to_sign = field_hash
      what_to_sign += value_hash
      what_to_sign += Digest::SHA512.hexdigest(doc_hash)
      what_to_sign += Digest::SHA512.hexdigest(credentials_hash)
      what_to_sign += point_type
      what_to_sign += weight.to_s
      what_to_sign += timestamp.to_s
      what_to_sign += this_client_id
      what_to_sign += VChainClient::Client::DATA_POINT_VERSION

      if @log.debug?
        @log.debug("[Crypto.signDataPoint] field_hash: #{field_hash}")
        @log.debug("[Crypto.signDataPoint] value_hash: #{value_hash}")
      end

  signature = nil

  begin
    
    signature = @@ec_ecc_private.sign(digest, what_to_sign)

  rescue => e
    if @log.error?
      @log.error("[Crypto.signDataPoint] ec.sign raised exception:")
      @log.error("#{e.class}, #{e.message}")
      @log.error("-> this_client_id: #{this_client_id}")
      @log.error("-> doc_hash: #{doc_hash}")
      @log.error("-> credentials_hash: #{credentials_hash}")
      @log.error("-> weight: "+ weight.to_s)
      @log.error("-> timestamp: "+ timestamp.to_s)
      @log.error("-> point_type: #{point_type}")
      @log.error("-> key path: #{priv_key_path}")
      @log.error("-> data:")
      @log.error(data)
      @log.error("--> priv_key_path: #{priv_key_path}")
      @log.error("--> what_to_sign: #{what_to_sign}")
    end

    raise e
  end

  if signature == nil
    if @log.error?
      @log.error("[Crypto.signDataPoint] failed to sign")
      @log.error("-> this_client_id: #{this_client_id}")
      @log.error("-> doc_hash: #{doc_hash}")
      @log.error("-> credentials_hash: #{credentials_hash}")
      @log.error("-> weight: "+ weight.to_s)
      @log.error("-> timestamp: "+ timestamp.to_s)
      @log.error("-> point_type: #{point_type}")
      @log.error("-> key path: #{priv_key_path}")
      @log.error("-> data:")
      @log.error(data)
      @log.error("--> priv_key_path: #{priv_key_path}")
      @log.error("--> what_to_sign: #{what_to_sign}")
    end

    return nil
  end

  if @log.debug?
    @log.debug("[Crypto.signDataPoint] signature raw: "+ Base64.encode64(signature))
  end

      output[field] = Base64.encode64(signature).gsub(/\n/, "")

    end
  }

      if @log.debug?
@log.debug("[Crypto.signDataPoint] output:")
@log.debug(output)
      end

  return output
end

#signRequest(document, point_type, weight, timestamp) ⇒ Object 



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# File 'lib/vchain_client/crypto.rb', line 327

def signRequest(document, point_type, weight, timestamp)
  
  OpenSSL::PKey::EC.send(:alias_method, :private?, :private_key?)

  priv_key_path = @config["ecc_private_key_location"]

  if @log.debug?
    @log.debug("[Crypto.signRequest] input:")
    @log.debug("-> point_type: "+ point_type)
    @log.debug("-> weight: "+ weight.to_s)
    @log.debug("-> timestamp: "+ timestamp.to_s)
    @log.debug("-> key path: #{priv_key_path}")
    @log.debug("-> input:")
    @log.debug(document)
  end

  if @@ecc_private_key == nil

    begin

      @@ecc_private_key = File.read(priv_key_path)

    rescue => e
      if @log.error?
        @log.error("[Crypto.signRequest] File.read raised exception:")
        @log.error("#{e.class}, #{e.message}")
        @log.error("-> point_type: "+ point_type)
        @log.error("-> weight: "+ weight.to_s)
        @log.error("-> timestamp: "+ timestamp.to_s)
        @log.error("-> input:")
        @log.error(document)
        @log.error("--> priv_key_path: #{priv_key_path}")
      end

      raise e
    end

    if @log.debug?
      @log.debug("[Crypto.signRequest] priv key is loaded")
    end

  end

  if @@ecc_private_key == nil
    if @log.error?
      @log.error("[Crypto.signRequest] failed to load private key")
      @log.error("-> point_type: "+ point_type)
      @log.error("-> weight: "+ weight.to_s)
      @log.error("-> timestamp: "+ timestamp.to_s)
      @log.error("-> input:")
      @log.error(document)
      @log.error("--> priv_key_path: #{priv_key_path}")
    end

    return nil
  end

  if @@ec_ecc_private == nil

    begin
      
      @@ec_ecc_private = OpenSSL::PKey::EC.new(@@ecc_private_key)

    rescue => e
      if @log.error?
        @log.error("[Crypto.signRequest] OpenSSL::PKey::EC.new raised exception:")
        @log.error("#{e.class}, #{e.message}")
        @log.error("-> point_type: "+ point_type)
        @log.error("-> weight: "+ weight.to_s)
        @log.error("-> timestamp: "+ timestamp.to_s)
        @log.error("-> input:")
        @log.error(document)
        @log.error("--> priv_key_path: #{priv_key_path}")
      end

      raise e
    end

    if @log.debug?
      @log.debug("[Crypto.signRequest] key initialized")
    end

  end

  if @@ec_ecc_private == nil
    if @log.error?
      @log.error("[Crypto.signRequest] failed init EC key")
      @log.error("-> point_type: "+ point_type)
      @log.error("-> weight: "+ weight.to_s)
      @log.error("-> timestamp: "+ timestamp.to_s)
      @log.error("-> input:")
      @log.error(document)
      @log.error("--> priv_key_path: #{priv_key_path}")
    end

    return nil
  end

  digest = OpenSSL::Digest::SHA256.new

  whole_sign = document.to_json + point_type + weight.to_s + timestamp.to_s

  if @log.debug?
    @log.debug("[Crypto.signRequest] whole_to_sign: "+ whole_sign)
  end

  whole_signature = nil

  begin
    
    whole_signature = @@ec_ecc_private.sign(digest, whole_sign)

  rescue => e
    if @log.error?
      @log.error("[Crypto.signRequest] ec.sign raised exception:")
      @log.error("#{e.class}, #{e.message}")
      @log.error("-> point_type: "+ point_type)
      @log.error("-> weight: "+ weight.to_s)
      @log.error("-> timestamp: "+ timestamp.to_s)
      @log.error("-> input:")
      @log.error(document)
      @log.error("--> priv_key_path: #{priv_key_path}")
      @log.error("--> whole_sign: #{whole_sign}")
    end

    raise e
  end

  if whole_signature == nil
    if @log.error?
      @log.error("[Crypto.signRequest] failed to sign")
      @log.error("-> point_type: "+ point_type)
      @log.error("-> weight: "+ weight.to_s)
      @log.error("-> timestamp: "+ timestamp.to_s)
      @log.error("-> input:")
      @log.error(document)
      @log.error("--> priv_key_path: #{priv_key_path}")
      @log.error("--> whole_sign: #{whole_sign}")
    end

    return nil
  end

  if @log.debug?
    @log.debug("[Crypto.signRequest] whole_signature raw: "+ Base64.encode64(whole_signature))
  end

  return Base64.encode64(whole_signature).gsub(/\n/, "")
end

#verifySignature(what_to_check, signature, public_key) ⇒ Object 



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# File 'lib/vchain_client/crypto.rb', line 477

def verifySignature(what_to_check, signature, public_key)
  pub_key = "-----BEGIN PUBLIC KEY-----\n"
  pub_key += public_key
      pub_key += "\n-----END PUBLIC KEY-----"

      ec = nil

      begin

ec = OpenSSL::PKey::EC.new(pub_key)

      rescue => e
if @log.error?
  @log.error("[Crypto.verifySignature] OpenSSL::PKey::EC.new raised exception:")
  @log.error("#{e.class}, #{e.message}")
  @log.error("-> what_to_check: #{what_to_check}")
  @log.error("-> signature: "+ Base64.encode64(signature))
  @log.error("-> public_key: "+ pub_key)
  @log.error(document)
  @log.error("--> pub_key: #{pub_key}")
end

raise e
      end

      if ec == nil
if @log.error?
  @log.error("[Crypto.verifySignature] failed init EC key")
  @log.error("-> what_to_check: #{what_to_check}")
  @log.error("-> signature: "+ Base64.encode64(signature))
  @log.error("-> public_key: "+ pub_key)
  @log.error("--> pub_key: #{pub_key}")
end

return false
      end

      digest = OpenSSL::Digest::SHA256.new

      begin

return ec.verify(digest, signature, what_to_check)

      rescue => e
if @log.error?
  @log.error("[Crypto.verifySignature] ec.verify raised exception:")
  @log.error("#{e.class}, #{e.message}")
  @log.error("-> what_to_check: #{what_to_check}")
  @log.error("-> signature: "+ Base64.encode64(signature))
  @log.error("-> public_key: "+ pub_key)
  @log.error(document)
  @log.error("--> signature: "+ Base64.encode64(signature))
  @log.error("--> what_to_check: #{what_to_check}")
end

raise e
      end
end