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LibTLS: Use a more precise KeyExchangeAlgorithm enum

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The old enumeration didn't allow discriminating the key exchange
algorithms used, but only allowed the handshake with the server. With
this new enumeration, we can know which key exchange algorithm we are
actually supposed to use :^)
This commit is contained in:
DexesTTP 2021-05-29 07:29:56 +02:00 • committed by Ali Mohammad Pur
parent dd35aa7725
commit cb4a0dec8a
4 changed files with 116 additions and 47 deletions
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50
Userland/Libraries/LibTLS/TLSv12.h
View file

@ -168,31 +168,31 @@ enum ClientVerificationStaus {
// GCM specifically asks us to transmit only the nonce, the counter is zero
// and the fixed IV is derived from the premaster key.
#define ENUMERATE_CIPHERS(C) \
C(true, CipherSuite::RSA_WITH_AES_128_CBC_SHA, SignatureAlgorithm::RSA, CipherAlgorithm::AES_128_CBC, Crypto::Hash::SHA1, 16, false) \
C(true, CipherSuite::RSA_WITH_AES_256_CBC_SHA, SignatureAlgorithm::RSA, CipherAlgorithm::AES_256_CBC, Crypto::Hash::SHA1, 16, false) \
C(true, CipherSuite::RSA_WITH_AES_128_CBC_SHA256, SignatureAlgorithm::RSA, CipherAlgorithm::AES_128_CBC, Crypto::Hash::SHA256, 16, false) \
C(true, CipherSuite::RSA_WITH_AES_256_CBC_SHA256, SignatureAlgorithm::RSA, CipherAlgorithm::AES_256_CBC, Crypto::Hash::SHA256, 16, false) \
C(true, CipherSuite::RSA_WITH_AES_128_GCM_SHA256, SignatureAlgorithm::RSA, CipherAlgorithm::AES_128_GCM, Crypto::Hash::SHA256, 8, true) \
C(true, CipherSuite::RSA_WITH_AES_256_GCM_SHA384, SignatureAlgorithm::RSA, CipherAlgorithm::AES_256_GCM, Crypto::Hash::SHA384, 8, true)
C(true, CipherSuite::RSA_WITH_AES_128_CBC_SHA, KeyExchangeAlgorithm::RSA, CipherAlgorithm::AES_128_CBC, Crypto::Hash::SHA1, 16, false) \
C(true, CipherSuite::RSA_WITH_AES_256_CBC_SHA, KeyExchangeAlgorithm::RSA, CipherAlgorithm::AES_256_CBC, Crypto::Hash::SHA1, 16, false) \
C(true, CipherSuite::RSA_WITH_AES_128_CBC_SHA256, KeyExchangeAlgorithm::RSA, CipherAlgorithm::AES_128_CBC, Crypto::Hash::SHA256, 16, false) \
C(true, CipherSuite::RSA_WITH_AES_256_CBC_SHA256, KeyExchangeAlgorithm::RSA, CipherAlgorithm::AES_256_CBC, Crypto::Hash::SHA256, 16, false) \
C(true, CipherSuite::RSA_WITH_AES_128_GCM_SHA256, KeyExchangeAlgorithm::RSA, CipherAlgorithm::AES_128_GCM, Crypto::Hash::SHA256, 8, true) \
C(true, CipherSuite::RSA_WITH_AES_256_GCM_SHA384, KeyExchangeAlgorithm::RSA, CipherAlgorithm::AES_256_GCM, Crypto::Hash::SHA384, 8, true)
constexpr SignatureAlgorithm get_signature_algorithm(CipherSuite suite)
constexpr KeyExchangeAlgorithm get_key_exchange_algorithm(CipherSuite suite)
{
switch (suite) {
#define C(is_supported, suite, signature, cipher, hash, iv_size, is_aead) \
case suite: \
return signature;
#define C(is_supported, suite, key_exchange, cipher, hash, iv_size, is_aead) \
case suite: \
return key_exchange;
ENUMERATE_CIPHERS(C)
#undef C
default:
return SignatureAlgorithm::Anonymous;
return KeyExchangeAlgorithm::Invalid;
}
}
constexpr CipherAlgorithm get_cipher_algorithm(CipherSuite suite)
{
switch (suite) {
#define C(is_supported, suite, signature, cipher, hash, iv_size, is_aead) \
case suite: \
#define C(is_supported, suite, key_exchange, cipher, hash, iv_size, is_aead) \
case suite: \
return cipher;
ENUMERATE_CIPHERS(C)
#undef C
@ -205,8 +205,8 @@ struct Options {
static Vector<CipherSuite> default_usable_cipher_suites()
{
Vector<CipherSuite> cipher_suites;
#define C(is_supported, suite, signature, cipher, hash, iv_size, is_aead) \
if constexpr (is_supported) \
#define C(is_supported, suite, key_exchange, cipher, hash, iv_size, is_aead) \
if constexpr (is_supported) \
cipher_suites.empend(suite);
ENUMERATE_CIPHERS(C)
#undef C
@ -342,8 +342,8 @@ public:
bool supports_cipher(CipherSuite suite) const
{
switch (suite) {
#define C(is_supported, suite, signature, cipher, hash, iv_size, is_aead) \
case suite: \
#define C(is_supported, suite, key_exchange, cipher, hash, iv_size, is_aead) \
case suite: \
return is_supported;
ENUMERATE_CIPHERS(C)
#undef C
@ -424,8 +424,8 @@ private:
size_t key_length() const
{
switch (m_context.cipher) {
#define C(is_supported, suite, signature, cipher, hash, iv_size, is_aead) \
case suite: \
#define C(is_supported, suite, key_exchange, cipher, hash, iv_size, is_aead) \
case suite: \
return cipher_key_size(cipher) / 8;
ENUMERATE_CIPHERS(C)
#undef C
@ -437,8 +437,8 @@ private:
size_t mac_length() const
{
switch (m_context.cipher) {
#define C(is_supported, suite, signature, cipher, hash, iv_size, is_aead) \
case suite: \
#define C(is_supported, suite, key_exchange, cipher, hash, iv_size, is_aead) \
case suite: \
return hash ::digest_size();
ENUMERATE_CIPHERS(C)
#undef C
@ -450,8 +450,8 @@ private:
size_t iv_length() const
{
switch (m_context.cipher) {
#define C(is_supported, suite, signature, cipher, hash, iv_size, is_aead) \
case suite: \
#define C(is_supported, suite, key_exchange, cipher, hash, iv_size, is_aead) \
case suite: \
return iv_size;
ENUMERATE_CIPHERS(C)
#undef C
@ -463,8 +463,8 @@ private:
bool is_aead() const
{
switch (m_context.cipher) {
#define C(is_supported, suite, signature, cipher, hash, iv_size, is_aead) \
case suite: \
#define C(is_supported, suite, key_exchange, cipher, hash, iv_size, is_aead) \
case suite: \
return is_aead;
ENUMERATE_CIPHERS(C)
#undef C