diff options
Diffstat (limited to 'src/tls/tls_ciphersuite.cpp')
| -rw-r--r-- | src/tls/tls_ciphersuite.cpp | 92 |
1 files changed, 83 insertions, 9 deletions
diff --git a/src/tls/tls_ciphersuite.cpp b/src/tls/tls_ciphersuite.cpp index 1dde8514e..841ce72e8 100644 --- a/src/tls/tls_ciphersuite.cpp +++ b/src/tls/tls_ciphersuite.cpp @@ -1,11 +1,12 @@ /* * TLS Cipher Suite -* (C) 2004-2010,2012 Jack Lloyd +* (C) 2004-2010,2012,2013 Jack Lloyd * * Released under the terms of the Botan license */ #include <botan/tls_ciphersuite.h> +#include <botan/libstate.h> #include <botan/parsing.h> #include <sstream> #include <stdexcept> @@ -24,14 +25,12 @@ std::vector<Ciphersuite> gather_known_ciphersuites() { std::vector<Ciphersuite> ciphersuites; - for(size_t i = 0; i != 65536; ++i) + for(size_t i = 0; i <= 0xFFFF; ++i) { Ciphersuite suite = Ciphersuite::by_id(i); - if(!suite.valid()) - continue; // not a ciphersuite we know, skip - - ciphersuites.push_back(suite); + if(suite.valid()) + ciphersuites.push_back(suite); } return ciphersuites; @@ -86,15 +85,90 @@ bool Ciphersuite::psk_ciphersuite() const bool Ciphersuite::ecc_ciphersuite() const { - return (kex_algo() == "ECDH" || sig_algo() == "ECDSA"); + return (sig_algo() == "ECDSA" || kex_algo() == "ECDH" || kex_algo() == "ECDHE_PSK"); } bool Ciphersuite::valid() const { - if(!m_cipher_keylen) + if(!m_cipher_keylen) // uninitialized object + return false; + + Algorithm_Factory& af = global_state().algorithm_factory(); + + if(!af.prototype_hash_function(prf_algo())) return false; - // fixme: check that all sub-algorithms are enabled + if(mac_algo() == "AEAD") + { + auto cipher_and_mode = split_on(cipher_algo(), '/'); + BOTAN_ASSERT(cipher_and_mode.size() == 2, "Expected format for AEAD algo"); + if(!af.prototype_block_cipher(cipher_and_mode[0])) + return false; + + const auto mode = cipher_and_mode[1]; + +#if !defined(BOTAN_HAS_AEAD_CCM) + if(mode == "CCM") + return false; +#endif + +#if !defined(BOTAN_HAS_AEAD_GCM) + if(mode == "GCM") + return false; +#endif + +#if !defined(BOTAN_HAS_AEAD_OCB) + if(mode == "OCB") + return false; +#endif + } + else + { + if(!af.prototype_block_cipher(cipher_algo()) && + !af.prototype_stream_cipher(cipher_algo())) + return false; + + if(!af.prototype_hash_function(mac_algo())) + return false; + } + + if(kex_algo() == "SRP_SHA") + { +#if !defined(BOTAN_HAS_SRP6) + return false; +#endif + } + else if(kex_algo() == "ECDH" || kex_algo() == "ECDHE_PSK") + { +#if !defined(BOTAN_HAS_ECDH) + return false; +#endif + } + else if(kex_algo() == "DH" || kex_algo() == "DHE_PSK") + { +#if !defined(BOTAN_HAS_DIFFIE_HELLMAN) + return false; +#endif + } + + if(sig_algo() == "DSA") + { +#if !defined(BOTAN_HAS_DSA) + return false; +#endif + } + else if(sig_algo() == "ECDSA") + { +#if !defined(BOTAN_HAS_ECDSA) + return false; +#endif + } + else if(sig_algo() == "RSA") + { +#if !defined(BOTAN_HAS_RSA) + return false; +#endif + } return true; } |