blob: 90aec932cdc49e9c461db6856a317cafff9e0f28 [file] [log] [blame]
* Copyright 2015 The Android Open Source Project
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* See the License for the specific language governing permissions and
* limitations under the License.
#include <memory>
#include <openssl/ec.h>
#include <openssl/engine.h>
#include <openssl/ex_data.h>
#include <openssl/rsa.h>
#include <hardware/keymaster0.h>
#include <hardware/keymaster_defs.h>
namespace keymaster {
struct KeymasterKeyBlob;
/* Keymaster0Engine is a BoringSSL ENGINE that implements RSA by forwarding the requested
* operations to a keymaster0 module. */
class Keymaster0Engine {
* Create a Keymaster0Engine, wrapping the provided keymaster0_device. The engine takes
* ownership of the device, and will close it during destruction.
Keymaster0Engine(const keymaster0_device_t* keymaster0_device);
bool supports_ec() const { return supports_ec_; }
bool GenerateRsaKey(uint64_t public_exponent, uint32_t public_modulus,
KeymasterKeyBlob* key_material) const;
bool GenerateEcKey(uint32_t key_size, KeymasterKeyBlob* key_material) const;
bool ImportKey(keymaster_key_format_t key_format, const KeymasterKeyBlob& to_import,
KeymasterKeyBlob* imported_key_material) const;
RSA* BlobToRsaKey(const KeymasterKeyBlob& blob) const;
EC_KEY* BlobToEcKey(const KeymasterKeyBlob& blob) const;
const keymaster_key_blob_t* RsaKeyToBlob(const RSA* rsa) const;
const keymaster_key_blob_t* EcKeyToBlob(const EC_KEY* rsa) const;
EVP_PKEY* GetKeymaster0PublicKey(const KeymasterKeyBlob& blob) const;
Keymaster0Engine(const Keymaster0Engine&); // Uncopyable
void operator=(const Keymaster0Engine&); // Unassignable
static int keyblob_dup(CRYPTO_EX_DATA* to, const CRYPTO_EX_DATA* from, void** from_d, int index,
long argl, void* argp);
static void keyblob_free(void* parent, void* ptr, CRYPTO_EX_DATA* data, int index, long argl,
void* argp);
static int rsa_private_transform(RSA* rsa, uint8_t* out, const uint8_t* in, size_t len);
static int ecdsa_sign(const uint8_t* digest, size_t digest_len, uint8_t* sig,
unsigned int* sig_len, EC_KEY* ec_key);
struct Malloc_Delete {
void operator()(void* p) { free(p); }
bool Keymaster0Sign(const void* signing_params, const keymaster_key_blob_t& key_blob,
const uint8_t* data, const size_t data_length,
std::unique_ptr<uint8_t[], Malloc_Delete>* signature,
size_t* signature_length) const;
int RsaPrivateTransform(RSA* rsa, uint8_t* out, const uint8_t* in, size_t len) const;
int EcdsaSign(const uint8_t* digest, size_t digest_len, uint8_t* sig, unsigned int* sig_len,
EC_KEY* ec_key) const;
const keymaster0_device_t* keymaster0_device_;
ENGINE* const engine_;
int rsa_index_, ec_key_index_;
bool supports_ec_;
static const RSA_METHOD rsa_method_;
static const ECDSA_METHOD ecdsa_method_;
static Keymaster0Engine* instance_;
} // namespace keymaster