Class: WalleeRubySdk::EncryptionUtil

Inherits:
Object
  • Object
show all
Defined in:
lib/wallee-ruby-sdk/utils/encryption_util.rb

Class Method Summary collapse

Class Method Details

.get_algorithm_class(algorithm) ⇒ Object 



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# File 'lib/wallee-ruby-sdk/utils/encryption_util.rb', line 71

def self.get_algorithm_class(algorithm)
  case algorithm
  when 'SHA256withECDSA'
    OpenSSL::PKey::EC
  else
    nil
  end
end

.is_content_valid(content, signature, public_key, encryption_algorithm) ⇒ Object 



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# File 'lib/wallee-ruby-sdk/utils/encryption_util.rb', line 26

def self.is_content_valid(content, signature, public_key, encryption_algorithm)

  if encryption_algorithm.nil? || encryption_algorithm.empty?
    raise WalleeSdkException.new(
      ErrorCode::MISSING_WEBHOOK_ENCRYPTION_ALGORYTHM,
      "Webhook signature algorithm was not provided"
    )
  end

  algorithm_class = get_algorithm_class(encryption_algorithm)
  if algorithm_class.nil?
    raise WalleeSdkException.new(ErrorCode::UNSUPPORTED_WEBHOOK_ENCRYPTION_ALGORYTHM,
      "Unsupported webhook signature algorithm: '#{encryption_algorithm}'. " \
      "This may indicate that the REST API is using a new encryption algorithm for webhooks. " \
      "Please check whether a newer version of the SDK is available.")
  end

  begin
    signature = Base64.decode64(signature)
  rescue ArgumentError
    raise WalleeSdkException.new(ErrorCode::INVALID_WEBHOOK_ENCRYPTION_CONTENT_SIGNATURE, 'Invalid signature value format')
  end

  begin
    public_key_bytes = Base64.decode64(public_key)
  rescue ArgumentError
    raise WalleeSdkException.new(ErrorCode::INVALID_WEBHOOK_ENCRYPTION_PUBLIC_KEY, 'Invalid public key value format')
  end

  begin
    public_key = OpenSSL::PKey.read(public_key_bytes)
  rescue OpenSSL::PKey::PKeyError
    raise WalleeSdkException.new(
        ErrorCode::INVALID_WEBHOOK_ENCRYPTION_PUBLIC_KEY,
        'Invalid public key: unsupported or unparseable format'
        )
  end

  begin
    return public_key.verify(OpenSSL::Digest::SHA256.new, signature, content)
  rescue OpenSSL::PKey::PKeyError, OpenSSL::PKey::ECError, OpenSSL::PKey::EC::Point::Error
    return false
  end
end