Module: StarkCore::Utils::Parse

Defined in:
lib/utils/parse.rb

Class Method Summary collapse

Class Method Details

.get_public_key_pem(sdk_version:, host:, api_version:, user:, language:, timeout:, refresh: false, **query) ⇒ Object 



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# File 'lib/utils/parse.rb', line 61

def self.get_public_key_pem(sdk_version:, host:, api_version:, user:, language:, timeout:, refresh: false, **query)
  public_key = StarkCore::Utils::Cache.starkbank_public_key
  return public_key unless (public_key.nil? || refresh)

  pem = StarkCore::Utils::Rest.get_raw(
    sdk_version: sdk_version,
    host: host,
    api_version: api_version,
    path: "public-key",
    user: user,
    language: language,
    timeout: timeout,
    query: {"limit": 1},
    prefix: nil,
    raiseException: true
  ).json['publicKeys'][0]['content']
  public_key = EllipticCurve::PublicKey.fromPem(pem)
  StarkCore::Utils::Cache.starkbank_public_key = public_key
  return public_key
end

.parse_and_verify(content:, signature:, sdk_version:, api_version:, host:, resource: nil, user:, language:, timeout:, key: nil) ⇒ Object 



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# File 'lib/utils/parse.rb', line 13

def self.parse_and_verify(content:, signature:, sdk_version:, api_version:, 
                          host:, resource: nil, user:, language:, timeout:, key: nil)
  content = verify(content: content, signature: signature, sdk_version: sdk_version, 
                    api_version: api_version, host: host, user: user, language: language, 
                    timeout: timeout)
  json = JSON.parse(content)
  json = JSON.parse(content)[key] unless key.nil?

  StarkCore::Utils::API.from_api_json(resource[:resource_maker], json)
end

.verify(content:, signature:, sdk_version:, api_version:, host:, user:, language:, timeout:) ⇒ Object

Raises:



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# File 'lib/utils/parse.rb', line 24

def self.verify(content:, signature:, sdk_version:, api_version:, host:, 
                user:, language:, timeout:)
  begin
    signature = EllipticCurve::Signature.fromBase64(signature)
  rescue
    raise(StarkCore::Error::InvalidSignatureError, 'The provided signature is not valid')
  end

  if verify_signature(content: content, signature: signature, sdk_version: sdk_version, 
                      host: host, api_version: api_version, user: user, 
                      language: language, timeout: timeout)
    return content
  end

  if verify_signature(content: content, signature: signature, sdk_version: sdk_version, 
                      host: host, api_version: api_version, user: user, 
                      language: language, timeout: timeout, refresh: true)
    return content
  end

  raise(StarkCore::Error::InvalidSignatureError, 'The provided signature and content do not match the Stark bank public key')
end

.verify_signature(content:, signature:, sdk_version:, host:, api_version:, user:, language:, timeout:, refresh: false) ⇒ Object 



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# File 'lib/utils/parse.rb', line 47

def self.verify_signature(content:, signature:, sdk_version:, host:, api_version:,
                          user:, language:, timeout:, refresh: false)
  public_key = get_public_key_pem(
    sdk_version: sdk_version,
    host: host,
    api_version: api_version,
    user: user,
    language: language,
    timeout: timeout,
    refresh: refresh
  )
  return EllipticCurve::Ecdsa.verify(content, signature, public_key)
end