/*************************************************************************/ /* crypto_mbedtls.h */ /*************************************************************************/ /* This file is part of: */ /* GODOT ENGINE */ /* https://godotengine.org */ /*************************************************************************/ /* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */ /* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */ /* */ /* Permission is hereby granted, free of charge, to any person obtaining */ /* a copy of this software and associated documentation files (the */ /* "Software"), to deal in the Software without restriction, including */ /* without limitation the rights to use, copy, modify, merge, publish, */ /* distribute, sublicense, and/or sell copies of the Software, and to */ /* permit persons to whom the Software is furnished to do so, subject to */ /* the following conditions: */ /* */ /* The above copyright notice and this permission notice shall be */ /* included in all copies or substantial portions of the Software. */ /* */ /* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */ /* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */ /* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/ /* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */ /* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */ /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */ /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /*************************************************************************/ #ifndef CRYPTO_MBEDTLS_H #define CRYPTO_MBEDTLS_H #include "core/crypto/crypto.h" #include "core/io/resource.h" #include <mbedtls/ctr_drbg.h> #include <mbedtls/entropy.h> #include <mbedtls/ssl.h> class CryptoMbedTLS; class SSLContextMbedTLS; class CryptoKeyMbedTLS : public CryptoKey { private: mbedtls_pk_context pkey; int locks = 0; bool public_only = true; public: static CryptoKey *create(); static void make_default() { CryptoKey::_create = create; } static void finalize() { CryptoKey::_create = nullptr; } virtual Error load(String p_path, bool p_public_only); virtual Error save(String p_path, bool p_public_only); virtual String save_to_string(bool p_public_only); virtual Error load_from_string(String p_string_key, bool p_public_only); virtual bool is_public_only() const { return public_only; }; CryptoKeyMbedTLS() { mbedtls_pk_init(&pkey); locks = 0; } ~CryptoKeyMbedTLS() { mbedtls_pk_free(&pkey); } _FORCE_INLINE_ void lock() { locks++; } _FORCE_INLINE_ void unlock() { locks--; } friend class CryptoMbedTLS; friend class SSLContextMbedTLS; }; class X509CertificateMbedTLS : public X509Certificate { private: mbedtls_x509_crt cert; int locks; public: static X509Certificate *create(); static void make_default() { X509Certificate::_create = create; } static void finalize() { X509Certificate::_create = nullptr; } virtual Error load(String p_path); virtual Error load_from_memory(const uint8_t *p_buffer, int p_len); virtual Error save(String p_path); X509CertificateMbedTLS() { mbedtls_x509_crt_init(&cert); locks = 0; } ~X509CertificateMbedTLS() { mbedtls_x509_crt_free(&cert); } _FORCE_INLINE_ void lock() { locks++; } _FORCE_INLINE_ void unlock() { locks--; } friend class CryptoMbedTLS; friend class SSLContextMbedTLS; }; class HMACContextMbedTLS : public HMACContext { private: HashingContext::HashType hash_type; int hash_len = 0; void *ctx = nullptr; public: static HMACContext *create(); static void make_default() { HMACContext::_create = create; } static void finalize() { HMACContext::_create = nullptr; } static bool is_md_type_allowed(mbedtls_md_type_t p_md_type); virtual Error start(HashingContext::HashType p_hash_type, PackedByteArray p_key); virtual Error update(PackedByteArray p_data); virtual PackedByteArray finish(); HMACContextMbedTLS() {} ~HMACContextMbedTLS(); }; class CryptoMbedTLS : public Crypto { private: mbedtls_entropy_context entropy; mbedtls_ctr_drbg_context ctr_drbg; static X509CertificateMbedTLS *default_certs; public: static Crypto *create(); static void initialize_crypto(); static void finalize_crypto(); static X509CertificateMbedTLS *get_default_certificates(); static void load_default_certificates(String p_path); static mbedtls_md_type_t md_type_from_hashtype(HashingContext::HashType p_hash_type, int &r_size); virtual PackedByteArray generate_random_bytes(int p_bytes); virtual Ref<CryptoKey> generate_rsa(int p_bytes); virtual Ref<X509Certificate> generate_self_signed_certificate(Ref<CryptoKey> p_key, String p_issuer_name, String p_not_before, String p_not_after); virtual Vector<uint8_t> sign(HashingContext::HashType p_hash_type, Vector<uint8_t> p_hash, Ref<CryptoKey> p_key); virtual bool verify(HashingContext::HashType p_hash_type, Vector<uint8_t> p_hash, Vector<uint8_t> p_signature, Ref<CryptoKey> p_key); virtual Vector<uint8_t> encrypt(Ref<CryptoKey> p_key, Vector<uint8_t> p_plaintext); virtual Vector<uint8_t> decrypt(Ref<CryptoKey> p_key, Vector<uint8_t> p_ciphertext); CryptoMbedTLS(); ~CryptoMbedTLS(); }; #endif // CRYPTO_MBEDTLS_H