/* * PBKDF/EMSA/EME/KDF/MGF Retrieval * (C) 1999-2007 Jack Lloyd * * Distributed under the terms of the Botan license */ #include <botan/lookup.h> #include <botan/libstate.h> #include <botan/scan_name.h> #if defined(BOTAN_HAS_PBKDF1) #include <botan/pbkdf1.h> #endif #if defined(BOTAN_HAS_PBKDF2) #include <botan/pbkdf2.h> #endif #if defined(BOTAN_HAS_PGPS2K) #include <botan/pgp_s2k.h> #endif #if defined(BOTAN_HAS_MGF1) #include <botan/mgf1.h> #endif #if defined(BOTAN_HAS_EMSA1) #include <botan/emsa1.h> #endif #if defined(BOTAN_HAS_EMSA1_BSI) #include <botan/emsa1_bsi.h> #endif #if defined(BOTAN_HAS_EMSA2) #include <botan/emsa2.h> #endif #if defined(BOTAN_HAS_EMSA3) #include <botan/emsa3.h> #endif #if defined(BOTAN_HAS_EMSA4) #include <botan/emsa4.h> #endif #if defined(BOTAN_HAS_EMSA_RAW) #include <botan/emsa_raw.h> #endif #if defined(BOTAN_HAS_EME1) #include <botan/eme1.h> #endif #if defined(BOTAN_HAS_EME_PKCS1v15) #include <botan/eme_pkcs.h> #endif #if defined(BOTAN_HAS_KDF1) #include <botan/kdf1.h> #endif #if defined(BOTAN_HAS_KDF2) #include <botan/kdf2.h> #endif #if defined(BOTAN_HAS_X942_PRF) #include <botan/prf_x942.h> #endif #if defined(BOTAN_HAS_SSL_V3_PRF) #include <botan/prf_ssl3.h> #endif #if defined(BOTAN_HAS_TLS_V10_PRF) #include <botan/prf_tls.h> #endif namespace Botan { /* * Get a PBKDF algorithm by name */ PBKDF* get_pbkdf(const std::string& algo_spec) { SCAN_Name request(algo_spec); Algorithm_Factory& af = global_state().algorithm_factory(); #if defined(BOTAN_HAS_PBKDF1) if(request.algo_name() == "PBKDF1" && request.arg_count() == 1) return new PKCS5_PBKDF1(af.make_hash_function(request.arg(0))); #endif #if defined(BOTAN_HAS_PBKDF2) if(request.algo_name() == "PBKDF2" && request.arg_count() == 1) { if(const MessageAuthenticationCode* mac_proto = af.prototype_mac(request.arg(0))) return new PKCS5_PBKDF2(mac_proto->clone()); return new PKCS5_PBKDF2(af.make_mac("HMAC(" + request.arg(0) + ")")); } #endif #if defined(BOTAN_HAS_PGPS2K) if(request.algo_name() == "OpenPGP-S2K" && request.arg_count() == 1) return new OpenPGP_S2K(af.make_hash_function(request.arg(0))); #endif throw Algorithm_Not_Found(algo_spec); } /* * Get an EMSA by name */ EMSA* get_emsa(const std::string& algo_spec) { SCAN_Name request(algo_spec); Algorithm_Factory& af = global_state().algorithm_factory(); #if defined(BOTAN_HAS_EMSA_RAW) if(request.algo_name() == "Raw" && request.arg_count() == 0) return new EMSA_Raw; #endif #if defined(BOTAN_HAS_EMSA1) if(request.algo_name() == "EMSA1" && request.arg_count() == 1) return new EMSA1(af.make_hash_function(request.arg(0))); #endif #if defined(BOTAN_HAS_EMSA1_BSI) if(request.algo_name() == "EMSA1_BSI" && request.arg_count() == 1) return new EMSA1_BSI(af.make_hash_function(request.arg(0))); #endif #if defined(BOTAN_HAS_EMSA2) if(request.algo_name() == "EMSA2" && request.arg_count() == 1) return new EMSA2(af.make_hash_function(request.arg(0))); #endif #if defined(BOTAN_HAS_EMSA3) if(request.algo_name() == "EMSA3" && request.arg_count() == 1) { if(request.arg(0) == "Raw") return new EMSA3_Raw; return new EMSA3(af.make_hash_function(request.arg(0))); } #endif #if defined(BOTAN_HAS_EMSA4) if(request.algo_name() == "EMSA4" && request.arg_count_between(1, 3)) { // 3 args: Hash, MGF, salt size (MGF is hardcoded MGF1 in Botan) if(request.arg_count() == 1) return new EMSA4(af.make_hash_function(request.arg(0))); if(request.arg_count() == 2 && request.arg(1) != "MGF1") return new EMSA4(af.make_hash_function(request.arg(0))); if(request.arg_count() == 3) return new EMSA4(af.make_hash_function(request.arg(0)), request.arg_as_integer(2, 0)); } #endif throw Algorithm_Not_Found(algo_spec); } /* * Get an EME by name */ EME* get_eme(const std::string& algo_spec) { SCAN_Name request(algo_spec); Algorithm_Factory& af = global_state().algorithm_factory(); if(request.algo_name() == "Raw") return 0; // No padding #if defined(BOTAN_HAS_EME_PKCS1v15) if(request.algo_name() == "PKCS1v15" && request.arg_count() == 0) return new EME_PKCS1v15; #endif #if defined(BOTAN_HAS_EME1) if(request.algo_name() == "EME1" && request.arg_count_between(1, 2)) { if(request.arg_count() == 1 || (request.arg_count() == 2 && request.arg(1) == "MGF1")) { return new EME1(af.make_hash_function(request.arg(0))); } } #endif throw Algorithm_Not_Found(algo_spec); } /* * Get an KDF by name */ KDF* get_kdf(const std::string& algo_spec) { SCAN_Name request(algo_spec); Algorithm_Factory& af = global_state().algorithm_factory(); if(request.algo_name() == "Raw") return 0; // No KDF #if defined(BOTAN_HAS_KDF1) if(request.algo_name() == "KDF1" && request.arg_count() == 1) return new KDF1(af.make_hash_function(request.arg(0))); #endif #if defined(BOTAN_HAS_KDF2) if(request.algo_name() == "KDF2" && request.arg_count() == 1) return new KDF2(af.make_hash_function(request.arg(0))); #endif #if defined(BOTAN_HAS_X942_PRF) if(request.algo_name() == "X9.42-PRF" && request.arg_count() == 1) return new X942_PRF(request.arg(0)); // OID #endif #if defined(BOTAN_HAS_TLS_V10_PRF) if(request.algo_name() == "TLS-PRF" && request.arg_count() == 0) return new TLS_PRF; #endif #if defined(BOTAN_HAS_SSL_V3_PRF) if(request.algo_name() == "SSL3-PRF" && request.arg_count() == 0) return new SSL3_PRF; #endif throw Algorithm_Not_Found(algo_spec); } }