Module: TTTLS13::CipherSuite

Defined in:
lib/tttls1.3/cipher_suites.rb

Constant Summary collapse

TLS_AES_128_GCM_SHA256 = 
"\x13\x01"
TLS_AES_256_GCM_SHA384 = 
"\x13\x02"
TLS_CHACHA20_POLY1305_SHA256 = 
"\x13\x03"

Class Method Summary collapse

Class Method Details

.auth_tag_len(cipher_suite) ⇒ Object 



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# File 'lib/tttls1.3/cipher_suites.rb', line 61

def auth_tag_len(cipher_suite)
  case cipher_suite
  when TLS_AES_128_GCM_SHA256, TLS_AES_256_GCM_SHA384,
       TLS_CHACHA20_POLY1305_SHA256 # , TLS_AES_128_CCM_SHA256
    16
  # when TLS_AES_128_CCM_8_SHA256
  #   8
  else
    raise Error::ErrorAlerts, :internal_error
  end
end

.digest(cipher_suite) ⇒ Object 



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# File 'lib/tttls1.3/cipher_suites.rb', line 14

def digest(cipher_suite)
  case cipher_suite
  when TLS_AES_128_GCM_SHA256, TLS_CHACHA20_POLY1305_SHA256
    # , TLS_AES_128_CCM_SHA256, TLS_AES_128_CCM_8_SHA256
    'SHA256'
  when TLS_AES_256_GCM_SHA384
    'SHA384'
  else
    raise Error::ErrorAlerts, :internal_error
  end
end

.hash_len(cipher_suite) ⇒ Object 



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# File 'lib/tttls1.3/cipher_suites.rb', line 26

def hash_len(cipher_suite)
  case cipher_suite
  when TLS_AES_128_GCM_SHA256, TLS_CHACHA20_POLY1305_SHA256
    # , TLS_AES_128_CCM_SHA256, TLS_AES_128_CCM_8_SHA256
    32
  when TLS_AES_256_GCM_SHA384
    48
  else
    raise Error::ErrorAlerts, :internal_error
  end
end

.iv_len(cipher_suite) ⇒ Object 



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# File 'lib/tttls1.3/cipher_suites.rb', line 50

def iv_len(cipher_suite)
  case cipher_suite
  when TLS_AES_128_GCM_SHA256, TLS_AES_256_GCM_SHA384,
       TLS_CHACHA20_POLY1305_SHA256
    # , TLS_AES_128_CCM_SHA256, TLS_AES_128_CCM_8_SHA256
    12
  else
    raise Error::ErrorAlerts, :internal_error
  end
end

.key_len(cipher_suite) ⇒ Object 



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# File 'lib/tttls1.3/cipher_suites.rb', line 38

def key_len(cipher_suite)
  case cipher_suite
  when TLS_AES_128_GCM_SHA256
    # , TLS_AES_128_CCM_SHA256, TLS_AES_128_CCM_8_SHA256
    16
  when TLS_AES_256_GCM_SHA384, TLS_CHACHA20_POLY1305_SHA256
    32
  else
    raise Error::ErrorAlerts, :internal_error
  end
end