/*
* 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
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <keymaster/soft_keymaster_context.h>
#include <memory>
#include <time.h>
#include <openssl/aes.h>
#include <openssl/hmac.h>
#include <openssl/rand.h>
#include <openssl/sha.h>
#include <keymaster/android_keymaster_utils.h>
#include <keymaster/logger.h>
#include "aes_key.h"
#include "auth_encrypted_key_blob.h"
#include "ec_keymaster0_key.h"
#include "ec_keymaster1_key.h"
#include "hmac_key.h"
#include "integrity_assured_key_blob.h"
#include "keymaster0_engine.h"
#include "ocb_utils.h"
#include "openssl_err.h"
#include "rsa_keymaster0_key.h"
#include "rsa_keymaster1_key.h"
using std::unique_ptr;
namespace keymaster {
namespace {
static uint8_t master_key_bytes[AES_BLOCK_SIZE] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
const KeymasterKeyBlob MASTER_KEY(master_key_bytes, array_length(master_key_bytes));
static uint8_t kRsaAttestKey[] = {
0x30, 0x82, 0x02, 0x5d, 0x02, 0x01, 0x00, 0x02, 0x81, 0x81, 0x00, 0xc0, 0x83, 0x23, 0xdc, 0x56,
0x88, 0x1b, 0xb8, 0x30, 0x20, 0x69, 0xf5, 0xb0, 0x85, 0x61, 0xc6, 0xee, 0xbe, 0x7f, 0x05, 0xe2,
0xf5, 0xa8, 0x42, 0x04, 0x8a, 0xbe, 0x8b, 0x47, 0xbe, 0x76, 0xfe, 0xae, 0xf2, 0x5c, 0xf2, 0x9b,
0x2a, 0xfa, 0x32, 0x00, 0x14, 0x16, 0x01, 0x42, 0x99, 0x89, 0xa1, 0x5f, 0xcf, 0xc6, 0x81, 0x5e,
0xb3, 0x63, 0x58, 0x3c, 0x2f, 0xd2, 0xf2, 0x0b, 0xe4, 0x98, 0x32, 0x83, 0xdd, 0x81, 0x4b, 0x16,
0xd7, 0xe1, 0x85, 0x41, 0x7a, 0xe5, 0x4a, 0xbc, 0x29, 0x6a, 0x3a, 0x6d, 0xb5, 0xc0, 0x04, 0x08,
0x3b, 0x68, 0xc5, 0x56, 0xc1, 0xf0, 0x23, 0x39, 0x91, 0x64, 0x19, 0x86, 0x4d, 0x50, 0xb7, 0x4d,
0x40, 0xae, 0xca, 0x48, 0x4c, 0x77, 0x35, 0x6c, 0x89, 0x5a, 0x0c, 0x27, 0x5a, 0xbf, 0xac, 0x49,
0x9d, 0x5d, 0x7d, 0x23, 0x62, 0xf2, 0x9c, 0x5e, 0x02, 0xe8, 0x71, 0x02, 0x03, 0x01, 0x00, 0x01,
0x02, 0x81, 0x81, 0x00, 0xbe, 0x86, 0x0b, 0x0b, 0x99, 0xa8, 0x02, 0xa6, 0xfb, 0x1a, 0x59, 0x43,
0x8a, 0x7b, 0xb7, 0x15, 0x06, 0x5b, 0x09, 0xa3, 0x6d, 0xc6, 0xe9, 0xca, 0xcc, 0x6b, 0xf3, 0xc0,
0x2c, 0x34, 0xd7, 0xd7, 0x9e, 0x94, 0xc6, 0x60, 0x64, 0x28, 0xd8, 0x8c, 0x7b, 0x7f, 0x65, 0x77,
0xc1, 0xcd, 0xea, 0x64, 0x07, 0x4a, 0xbe, 0x8e, 0x72, 0x86, 0xdf, 0x1f, 0x08, 0x11, 0xdc, 0x97,
0x28, 0x26, 0x08, 0x68, 0xde, 0x95, 0xd3, 0x2e, 0xfc, 0x96, 0xb6, 0xd0, 0x84, 0xff, 0x27, 0x1a,
0x5f, 0x60, 0xde, 0xfc, 0xc7, 0x03, 0xe7, 0xa3, 0x8e, 0x6e, 0x29, 0xba, 0x9a, 0x3c, 0x5f, 0xc2,
0xc2, 0x80, 0x76, 0xb6, 0xa8, 0x96, 0xaf, 0x1d, 0x34, 0xd7, 0x88, 0x28, 0xce, 0x9b, 0xdd, 0xb1,
0xf3, 0x4f, 0x9c, 0x94, 0x04, 0x43, 0x07, 0x81, 0x29, 0x8e, 0x20, 0x13, 0x16, 0x72, 0x5b, 0xbd,
0xbc, 0x99, 0x3a, 0x41, 0x02, 0x41, 0x00, 0xe1, 0xc6, 0xd9, 0x27, 0x64, 0x6c, 0x09, 0x16, 0xec,
0x36, 0x82, 0x6d, 0x59, 0x49, 0x83, 0x74, 0x0c, 0x21, 0xf1, 0xb0, 0x74, 0xc4, 0xa1, 0xa5, 0x98,
0x67, 0xc6, 0x69, 0x79, 0x5c, 0x85, 0xd3, 0xdc, 0x46, 0x4c, 0x5b, 0x92, 0x9e, 0x94, 0xbf, 0xb3,
0x4e, 0x0d, 0xcc, 0x50, 0x14, 0xb1, 0x0f, 0x13, 0x34, 0x1a, 0xb7, 0xfd, 0xd5, 0xf6, 0x04, 0x14,
0xd2, 0xa3, 0x26, 0xca, 0xd4, 0x1c, 0xc5, 0x02, 0x41, 0x00, 0xda, 0x48, 0x59, 0x97, 0x78, 0x5c,
0xd5, 0x63, 0x0f, 0xb0, 0xfd, 0x8c, 0x52, 0x54, 0xf9, 0x8e, 0x53, 0x8e, 0x18, 0x98, 0x3a, 0xae,
0x9e, 0x6b, 0x7e, 0x6a, 0x5a, 0x7b, 0x5d, 0x34, 0x37, 0x55, 0xb9, 0x21, 0x8e, 0xbd, 0x40, 0x32,
0x0d, 0x28, 0x38, 0x7d, 0x78, 0x9f, 0x76, 0xfa, 0x21, 0x8b, 0xcc, 0x2d, 0x8b, 0x68, 0xa5, 0xf6,
0x41, 0x8f, 0xbb, 0xec, 0xa5, 0x17, 0x9a, 0xb3, 0xaf, 0xbd, 0x02, 0x40, 0x50, 0xfe, 0xfc, 0x32,
0x64, 0x95, 0x59, 0x61, 0x6e, 0xd6, 0x53, 0x4e, 0x15, 0x45, 0x09, 0x32, 0x9d, 0x93, 0xa3, 0xd8,
0x10, 0xdb, 0xe5, 0xbd, 0xb9, 0x82, 0x29, 0x2c, 0xf7, 0x8b, 0xd8, 0xba, 0xdb, 0x80, 0x20, 0xae,
0x8d, 0x57, 0xf4, 0xb7, 0x1d, 0x05, 0x38, 0x6f, 0xfe, 0x9e, 0x9d, 0xb2, 0x71, 0xca, 0x34, 0x77,
0xa3, 0x49, 0x99, 0xdb, 0x76, 0xf8, 0xe5, 0xec, 0xe9, 0xc0, 0xd4, 0x9d, 0x02, 0x40, 0x15, 0xb7,
0x4c, 0xf2, 0x7c, 0xce, 0xff, 0x8b, 0xb3, 0x6b, 0xf0, 0x4d, 0x9d, 0x83, 0x46, 0xb0, 0x9a, 0x2f,
0x70, 0xd2, 0xf4, 0x43, 0x9b, 0x0f, 0x26, 0xac, 0x7e, 0x03, 0xf7, 0xe9, 0xd1, 0xf7, 0x7d, 0x4b,
0x91, 0x5f, 0xd2, 0x9b, 0x28, 0x23, 0xf0, 0x3a, 0xcb, 0x5d, 0x52, 0x00, 0xe0, 0x85, 0x7f, 0xf2,
0xa8, 0x03, 0xe9, 0x3e, 0xee, 0x96, 0xd6, 0x23, 0x5c, 0xe9, 0x54, 0x42, 0xbc, 0x21, 0x02, 0x41,
0x00, 0x90, 0xa7, 0x45, 0xda, 0x89, 0x70, 0xb2, 0xcd, 0x64, 0x96, 0x60, 0x32, 0x42, 0x28, 0xc5,
0xf8, 0x28, 0x56, 0xff, 0xd6, 0x65, 0xba, 0x9a, 0x85, 0xc8, 0xd6, 0x0f, 0x1b, 0x8b, 0xee, 0x71,
0x7e, 0xcd, 0x2c, 0x72, 0xea, 0xe0, 0x1d, 0xad, 0x86, 0xba, 0x76, 0x54, 0xd4, 0xcf, 0x45, 0xad,
0xb5, 0xf1, 0xf2, 0xb3, 0x1d, 0x9f, 0x81, 0x22, 0xcf, 0xa5, 0xf1, 0xa5, 0x57, 0x0f, 0x9b, 0x2d,
0x25,
};
static uint8_t kRsaAttestCert[] = {
0x30, 0x82, 0x02, 0xb6, 0x30, 0x82, 0x02, 0x1f, 0xa0, 0x03, 0x02, 0x01, 0x02, 0x02, 0x02, 0x10,
0x00, 0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x0b, 0x05, 0x00,
0x30, 0x63, 0x31, 0x0b, 0x30, 0x09, 0x06, 0x03, 0x55, 0x04, 0x06, 0x13, 0x02, 0x55, 0x53, 0x31,
0x13, 0x30, 0x11, 0x06, 0x03, 0x55, 0x04, 0x08, 0x0c, 0x0a, 0x43, 0x61, 0x6c, 0x69, 0x66, 0x6f,
0x72, 0x6e, 0x69, 0x61, 0x31, 0x16, 0x30, 0x14, 0x06, 0x03, 0x55, 0x04, 0x07, 0x0c, 0x0d, 0x4d,
0x6f, 0x75, 0x6e, 0x74, 0x61, 0x69, 0x6e, 0x20, 0x56, 0x69, 0x65, 0x77, 0x31, 0x15, 0x30, 0x13,
0x06, 0x03, 0x55, 0x04, 0x0a, 0x0c, 0x0c, 0x47, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2c, 0x20, 0x49,
0x6e, 0x63, 0x2e, 0x31, 0x10, 0x30, 0x0e, 0x06, 0x03, 0x55, 0x04, 0x0b, 0x0c, 0x07, 0x41, 0x6e,
0x64, 0x72, 0x6f, 0x69, 0x64, 0x30, 0x1e, 0x17, 0x0d, 0x31, 0x36, 0x30, 0x31, 0x30, 0x34, 0x31,
0x32, 0x34, 0x30, 0x35, 0x33, 0x5a, 0x17, 0x0d, 0x33, 0x35, 0x31, 0x32, 0x33, 0x30, 0x31, 0x32,
0x34, 0x30, 0x35, 0x33, 0x5a, 0x30, 0x76, 0x31, 0x0b, 0x30, 0x09, 0x06, 0x03, 0x55, 0x04, 0x06,
0x13, 0x02, 0x55, 0x53, 0x31, 0x13, 0x30, 0x11, 0x06, 0x03, 0x55, 0x04, 0x08, 0x0c, 0x0a, 0x43,
0x61, 0x6c, 0x69, 0x66, 0x6f, 0x72, 0x6e, 0x69, 0x61, 0x31, 0x15, 0x30, 0x13, 0x06, 0x03, 0x55,
0x04, 0x0a, 0x0c, 0x0c, 0x47, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2c, 0x20, 0x49, 0x6e, 0x63, 0x2e,
0x31, 0x10, 0x30, 0x0e, 0x06, 0x03, 0x55, 0x04, 0x0b, 0x0c, 0x07, 0x41, 0x6e, 0x64, 0x72, 0x6f,
0x69, 0x64, 0x31, 0x29, 0x30, 0x27, 0x06, 0x03, 0x55, 0x04, 0x03, 0x0c, 0x20, 0x41, 0x6e, 0x64,
0x72, 0x6f, 0x69, 0x64, 0x20, 0x53, 0x6f, 0x66, 0x74, 0x77, 0x61, 0x72, 0x65, 0x20, 0x41, 0x74,
0x74, 0x65, 0x73, 0x74, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x20, 0x4b, 0x65, 0x79, 0x30, 0x81, 0x9f,
0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x01, 0x05, 0x00, 0x03,
0x81, 0x8d, 0x00, 0x30, 0x81, 0x89, 0x02, 0x81, 0x81, 0x00, 0xc0, 0x83, 0x23, 0xdc, 0x56, 0x88,
0x1b, 0xb8, 0x30, 0x20, 0x69, 0xf5, 0xb0, 0x85, 0x61, 0xc6, 0xee, 0xbe, 0x7f, 0x05, 0xe2, 0xf5,
0xa8, 0x42, 0x04, 0x8a, 0xbe, 0x8b, 0x47, 0xbe, 0x76, 0xfe, 0xae, 0xf2, 0x5c, 0xf2, 0x9b, 0x2a,
0xfa, 0x32, 0x00, 0x14, 0x16, 0x01, 0x42, 0x99, 0x89, 0xa1, 0x5f, 0xcf, 0xc6, 0x81, 0x5e, 0xb3,
0x63, 0x58, 0x3c, 0x2f, 0xd2, 0xf2, 0x0b, 0xe4, 0x98, 0x32, 0x83, 0xdd, 0x81, 0x4b, 0x16, 0xd7,
0xe1, 0x85, 0x41, 0x7a, 0xe5, 0x4a, 0xbc, 0x29, 0x6a, 0x3a, 0x6d, 0xb5, 0xc0, 0x04, 0x08, 0x3b,
0x68, 0xc5, 0x56, 0xc1, 0xf0, 0x23, 0x39, 0x91, 0x64, 0x19, 0x86, 0x4d, 0x50, 0xb7, 0x4d, 0x40,
0xae, 0xca, 0x48, 0x4c, 0x77, 0x35, 0x6c, 0x89, 0x5a, 0x0c, 0x27, 0x5a, 0xbf, 0xac, 0x49, 0x9d,
0x5d, 0x7d, 0x23, 0x62, 0xf2, 0x9c, 0x5e, 0x02, 0xe8, 0x71, 0x02, 0x03, 0x01, 0x00, 0x01, 0xa3,
0x66, 0x30, 0x64, 0x30, 0x1d, 0x06, 0x03, 0x55, 0x1d, 0x0e, 0x04, 0x16, 0x04, 0x14, 0xd4, 0x0c,
0x10, 0x1b, 0xf8, 0xcd, 0x63, 0xb9, 0xf7, 0x39, 0x52, 0xb5, 0x0e, 0x13, 0x5c, 0xa6, 0xd7, 0x99,
0x93, 0x86, 0x30, 0x1f, 0x06, 0x03, 0x55, 0x1d, 0x23, 0x04, 0x18, 0x30, 0x16, 0x80, 0x14, 0x29,
0xfa, 0xf1, 0xac, 0xcc, 0x4d, 0xd2, 0x4c, 0x96, 0x40, 0x27, 0x75, 0xb6, 0xb0, 0xe9, 0x32, 0xe5,
0x07, 0xfe, 0x2e, 0x30, 0x12, 0x06, 0x03, 0x55, 0x1d, 0x13, 0x01, 0x01, 0xff, 0x04, 0x08, 0x30,
0x06, 0x01, 0x01, 0xff, 0x02, 0x01, 0x00, 0x30, 0x0e, 0x06, 0x03, 0x55, 0x1d, 0x0f, 0x01, 0x01,
0xff, 0x04, 0x04, 0x03, 0x02, 0x02, 0x84, 0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7,
0x0d, 0x01, 0x01, 0x0b, 0x05, 0x00, 0x03, 0x81, 0x81, 0x00, 0x9e, 0x2d, 0x48, 0x5f, 0x8c, 0x67,
0x33, 0xdc, 0x1a, 0x85, 0xad, 0x99, 0xd7, 0x50, 0x23, 0xea, 0x14, 0xec, 0x43, 0xb0, 0xe1, 0x9d,
0xea, 0xc2, 0x23, 0x46, 0x1e, 0x72, 0xb5, 0x19, 0xdc, 0x60, 0x22, 0xe4, 0xa5, 0x68, 0x31, 0x6c,
0x0b, 0x55, 0xc4, 0xe6, 0x9c, 0xa2, 0x2d, 0x9f, 0x3a, 0x4f, 0x93, 0x6b, 0x31, 0x8b, 0x16, 0x78,
0x16, 0x0d, 0x88, 0xcb, 0xd9, 0x8b, 0xcc, 0x80, 0x9d, 0x84, 0xf0, 0xc2, 0x27, 0xe3, 0x6b, 0x38,
0xf1, 0xfd, 0xd1, 0xe7, 0x17, 0x72, 0x31, 0x59, 0x35, 0x7d, 0x96, 0xf3, 0xc5, 0x7f, 0xab, 0x9d,
0x8f, 0x96, 0x61, 0x26, 0x4f, 0xb2, 0xbe, 0x81, 0xbb, 0x0d, 0x49, 0x04, 0x22, 0x8a, 0xce, 0x9f,
0xf7, 0xf5, 0x42, 0x2e, 0x25, 0x44, 0xfa, 0x21, 0x07, 0x12, 0x5a, 0x83, 0xb5, 0x55, 0xad, 0x18,
0x82, 0xf8, 0x40, 0x14, 0x9b, 0x9c, 0x20, 0x63, 0x04, 0x7f,
};
static uint8_t kRsaAttestRootCert[] = {
0x30, 0x82, 0x02, 0xa7, 0x30, 0x82, 0x02, 0x10, 0xa0, 0x03, 0x02, 0x01, 0x02, 0x02, 0x09, 0x00,
0xff, 0x94, 0xd9, 0xdd, 0x9f, 0x07, 0xc8, 0x0c, 0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86,
0xf7, 0x0d, 0x01, 0x01, 0x0b, 0x05, 0x00, 0x30, 0x63, 0x31, 0x0b, 0x30, 0x09, 0x06, 0x03, 0x55,
0x04, 0x06, 0x13, 0x02, 0x55, 0x53, 0x31, 0x13, 0x30, 0x11, 0x06, 0x03, 0x55, 0x04, 0x08, 0x0c,
0x0a, 0x43, 0x61, 0x6c, 0x69, 0x66, 0x6f, 0x72, 0x6e, 0x69, 0x61, 0x31, 0x16, 0x30, 0x14, 0x06,
0x03, 0x55, 0x04, 0x07, 0x0c, 0x0d, 0x4d, 0x6f, 0x75, 0x6e, 0x74, 0x61, 0x69, 0x6e, 0x20, 0x56,
0x69, 0x65, 0x77, 0x31, 0x15, 0x30, 0x13, 0x06, 0x03, 0x55, 0x04, 0x0a, 0x0c, 0x0c, 0x47, 0x6f,
0x6f, 0x67, 0x6c, 0x65, 0x2c, 0x20, 0x49, 0x6e, 0x63, 0x2e, 0x31, 0x10, 0x30, 0x0e, 0x06, 0x03,
0x55, 0x04, 0x0b, 0x0c, 0x07, 0x41, 0x6e, 0x64, 0x72, 0x6f, 0x69, 0x64, 0x30, 0x1e, 0x17, 0x0d,
0x31, 0x36, 0x30, 0x31, 0x30, 0x34, 0x31, 0x32, 0x33, 0x31, 0x30, 0x38, 0x5a, 0x17, 0x0d, 0x33,
0x35, 0x31, 0x32, 0x33, 0x30, 0x31, 0x32, 0x33, 0x31, 0x30, 0x38, 0x5a, 0x30, 0x63, 0x31, 0x0b,
0x30, 0x09, 0x06, 0x03, 0x55, 0x04, 0x06, 0x13, 0x02, 0x55, 0x53, 0x31, 0x13, 0x30, 0x11, 0x06,
0x03, 0x55, 0x04, 0x08, 0x0c, 0x0a, 0x43, 0x61, 0x6c, 0x69, 0x66, 0x6f, 0x72, 0x6e, 0x69, 0x61,
0x31, 0x16, 0x30, 0x14, 0x06, 0x03, 0x55, 0x04, 0x07, 0x0c, 0x0d, 0x4d, 0x6f, 0x75, 0x6e, 0x74,
0x61, 0x69, 0x6e, 0x20, 0x56, 0x69, 0x65, 0x77, 0x31, 0x15, 0x30, 0x13, 0x06, 0x03, 0x55, 0x04,
0x0a, 0x0c, 0x0c, 0x47, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2c, 0x20, 0x49, 0x6e, 0x63, 0x2e, 0x31,
0x10, 0x30, 0x0e, 0x06, 0x03, 0x55, 0x04, 0x0b, 0x0c, 0x07, 0x41, 0x6e, 0x64, 0x72, 0x6f, 0x69,
0x64, 0x30, 0x81, 0x9f, 0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01,
0x01, 0x05, 0x00, 0x03, 0x81, 0x8d, 0x00, 0x30, 0x81, 0x89, 0x02, 0x81, 0x81, 0x00, 0xa2, 0x6b,
0xad, 0xeb, 0x6e, 0x2e, 0x44, 0x61, 0xef, 0xd5, 0x0e, 0x82, 0xe6, 0xb7, 0x94, 0xd1, 0x75, 0x23,
0x1f, 0x77, 0x9b, 0x63, 0x91, 0x63, 0xff, 0xf7, 0xaa, 0xff, 0x0b, 0x72, 0x47, 0x4e, 0xc0, 0x2c,
0x43, 0xec, 0x33, 0x7c, 0xd7, 0xac, 0xed, 0x40, 0x3e, 0x8c, 0x28, 0xa0, 0x66, 0xd5, 0xf7, 0x87,
0x0b, 0x33, 0x97, 0xde, 0x0e, 0xb8, 0x4e, 0x13, 0x40, 0xab, 0xaf, 0xa5, 0x27, 0xbf, 0x95, 0x69,
0xa0, 0x31, 0xdb, 0x06, 0x52, 0x65, 0xf8, 0x44, 0x59, 0x57, 0x61, 0xf0, 0xbb, 0xf2, 0x17, 0x4b,
0xb7, 0x41, 0x80, 0x64, 0xc0, 0x28, 0x0e, 0x8f, 0x52, 0x77, 0x8e, 0xdb, 0xd2, 0x47, 0xb6, 0x45,
0xe9, 0x19, 0xc8, 0xe9, 0x8b, 0xc3, 0xdb, 0xc2, 0x91, 0x3f, 0xd7, 0xd7, 0x50, 0xc4, 0x1d, 0x35,
0x66, 0xf9, 0x57, 0xe4, 0x97, 0x96, 0x0b, 0x09, 0xac, 0xce, 0x92, 0x35, 0x85, 0x9b, 0x02, 0x03,
0x01, 0x00, 0x01, 0xa3, 0x63, 0x30, 0x61, 0x30, 0x1d, 0x06, 0x03, 0x55, 0x1d, 0x0e, 0x04, 0x16,
0x04, 0x14, 0x29, 0xfa, 0xf1, 0xac, 0xcc, 0x4d, 0xd2, 0x4c, 0x96, 0x40, 0x27, 0x75, 0xb6, 0xb0,
0xe9, 0x32, 0xe5, 0x07, 0xfe, 0x2e, 0x30, 0x1f, 0x06, 0x03, 0x55, 0x1d, 0x23, 0x04, 0x18, 0x30,
0x16, 0x80, 0x14, 0x29, 0xfa, 0xf1, 0xac, 0xcc, 0x4d, 0xd2, 0x4c, 0x96, 0x40, 0x27, 0x75, 0xb6,
0xb0, 0xe9, 0x32, 0xe5, 0x07, 0xfe, 0x2e, 0x30, 0x0f, 0x06, 0x03, 0x55, 0x1d, 0x13, 0x01, 0x01,
0xff, 0x04, 0x05, 0x30, 0x03, 0x01, 0x01, 0xff, 0x30, 0x0e, 0x06, 0x03, 0x55, 0x1d, 0x0f, 0x01,
0x01, 0xff, 0x04, 0x04, 0x03, 0x02, 0x02, 0x84, 0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86,
0xf7, 0x0d, 0x01, 0x01, 0x0b, 0x05, 0x00, 0x03, 0x81, 0x81, 0x00, 0x4f, 0x72, 0xf3, 0x36, 0x59,
0x8d, 0x0e, 0xc1, 0xb9, 0x74, 0x5b, 0x31, 0x59, 0xf6, 0xf0, 0x8d, 0x25, 0x49, 0x30, 0x9e, 0xa3,
0x1c, 0x1c, 0x29, 0xd2, 0x45, 0x2d, 0x20, 0xb9, 0x4d, 0x5f, 0x64, 0xb4, 0xe8, 0x80, 0xc7, 0x78,
0x7a, 0x9c, 0x39, 0xde, 0xa8, 0xb3, 0xf5, 0xbf, 0x2f, 0x70, 0x5f, 0x47, 0x10, 0x5c, 0xc5, 0xe6,
0xeb, 0x4d, 0x06, 0x99, 0x61, 0xd2, 0xae, 0x9a, 0x07, 0xff, 0xf7, 0x7c, 0xb8, 0xab, 0xeb, 0x9c,
0x0f, 0x24, 0x07, 0x5e, 0xb1, 0x7f, 0xba, 0x79, 0x71, 0xfd, 0x4d, 0x5b, 0x9e, 0xdf, 0x14, 0xa9,
0xfe, 0xdf, 0xed, 0x7c, 0xc0, 0x88, 0x5d, 0xf8, 0xdd, 0x9b, 0x64, 0x32, 0x56, 0xd5, 0x35, 0x9a,
0xe2, 0x13, 0xf9, 0x8f, 0xce, 0xc1, 0x7c, 0xdc, 0xef, 0xa4, 0xaa, 0xb2, 0x55, 0xc3, 0x83, 0xa9,
0x2e, 0xfb, 0x5c, 0xf6, 0x62, 0xf5, 0x27, 0x52, 0x17, 0xbe, 0x63,
};
static uint8_t kEcAttestKey[] = {
0x30, 0x77, 0x02, 0x01, 0x01, 0x04, 0x20, 0x21, 0xe0, 0x86, 0x43, 0x2a, 0x15, 0x19, 0x84, 0x59,
0xcf, 0x36, 0x3a, 0x50, 0xfc, 0x14, 0xc9, 0xda, 0xad, 0xf9, 0x35, 0xf5, 0x27, 0xc2, 0xdf, 0xd7,
0x1e, 0x4d, 0x6d, 0xbc, 0x42, 0xe5, 0x44, 0xa0, 0x0a, 0x06, 0x08, 0x2a, 0x86, 0x48, 0xce, 0x3d,
0x03, 0x01, 0x07, 0xa1, 0x44, 0x03, 0x42, 0x00, 0x04, 0xeb, 0x9e, 0x79, 0xf8, 0x42, 0x63, 0x59,
0xac, 0xcb, 0x2a, 0x91, 0x4c, 0x89, 0x86, 0xcc, 0x70, 0xad, 0x90, 0x66, 0x93, 0x82, 0xa9, 0x73,
0x26, 0x13, 0xfe, 0xac, 0xcb, 0xf8, 0x21, 0x27, 0x4c, 0x21, 0x74, 0x97, 0x4a, 0x2a, 0xfe, 0xa5,
0xb9, 0x4d, 0x7f, 0x66, 0xd4, 0xe0, 0x65, 0x10, 0x66, 0x35, 0xbc, 0x53, 0xb7, 0xa0, 0xa3, 0xa6,
0x71, 0x58, 0x3e, 0xdb, 0x3e, 0x11, 0xae, 0x10, 0x14,
};
static uint8_t kEcAttestCert[] = {
0x30, 0x82, 0x02, 0x78, 0x30, 0x82, 0x02, 0x1e, 0xa0, 0x03, 0x02, 0x01, 0x02, 0x02, 0x02, 0x10,
0x01, 0x30, 0x0a, 0x06, 0x08, 0x2a, 0x86, 0x48, 0xce, 0x3d, 0x04, 0x03, 0x02, 0x30, 0x81, 0x98,
0x31, 0x0b, 0x30, 0x09, 0x06, 0x03, 0x55, 0x04, 0x06, 0x13, 0x02, 0x55, 0x53, 0x31, 0x13, 0x30,
0x11, 0x06, 0x03, 0x55, 0x04, 0x08, 0x0c, 0x0a, 0x43, 0x61, 0x6c, 0x69, 0x66, 0x6f, 0x72, 0x6e,
0x69, 0x61, 0x31, 0x16, 0x30, 0x14, 0x06, 0x03, 0x55, 0x04, 0x07, 0x0c, 0x0d, 0x4d, 0x6f, 0x75,
0x6e, 0x74, 0x61, 0x69, 0x6e, 0x20, 0x56, 0x69, 0x65, 0x77, 0x31, 0x15, 0x30, 0x13, 0x06, 0x03,
0x55, 0x04, 0x0a, 0x0c, 0x0c, 0x47, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2c, 0x20, 0x49, 0x6e, 0x63,
0x2e, 0x31, 0x10, 0x30, 0x0e, 0x06, 0x03, 0x55, 0x04, 0x0b, 0x0c, 0x07, 0x41, 0x6e, 0x64, 0x72,
0x6f, 0x69, 0x64, 0x31, 0x33, 0x30, 0x31, 0x06, 0x03, 0x55, 0x04, 0x03, 0x0c, 0x2a, 0x41, 0x6e,
0x64, 0x72, 0x6f, 0x69, 0x64, 0x20, 0x4b, 0x65, 0x79, 0x73, 0x74, 0x6f, 0x72, 0x65, 0x20, 0x53,
0x6f, 0x66, 0x74, 0x77, 0x61, 0x72, 0x65, 0x20, 0x41, 0x74, 0x74, 0x65, 0x73, 0x74, 0x61, 0x74,
0x69, 0x6f, 0x6e, 0x20, 0x52, 0x6f, 0x6f, 0x74, 0x30, 0x1e, 0x17, 0x0d, 0x31, 0x36, 0x30, 0x31,
0x31, 0x31, 0x30, 0x30, 0x34, 0x36, 0x30, 0x39, 0x5a, 0x17, 0x0d, 0x32, 0x36, 0x30, 0x31, 0x30,
0x38, 0x30, 0x30, 0x34, 0x36, 0x30, 0x39, 0x5a, 0x30, 0x81, 0x88, 0x31, 0x0b, 0x30, 0x09, 0x06,
0x03, 0x55, 0x04, 0x06, 0x13, 0x02, 0x55, 0x53, 0x31, 0x13, 0x30, 0x11, 0x06, 0x03, 0x55, 0x04,
0x08, 0x0c, 0x0a, 0x43, 0x61, 0x6c, 0x69, 0x66, 0x6f, 0x72, 0x6e, 0x69, 0x61, 0x31, 0x15, 0x30,
0x13, 0x06, 0x03, 0x55, 0x04, 0x0a, 0x0c, 0x0c, 0x47, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2c, 0x20,
0x49, 0x6e, 0x63, 0x2e, 0x31, 0x10, 0x30, 0x0e, 0x06, 0x03, 0x55, 0x04, 0x0b, 0x0c, 0x07, 0x41,
0x6e, 0x64, 0x72, 0x6f, 0x69, 0x64, 0x31, 0x3b, 0x30, 0x39, 0x06, 0x03, 0x55, 0x04, 0x03, 0x0c,
0x32, 0x41, 0x6e, 0x64, 0x72, 0x6f, 0x69, 0x64, 0x20, 0x4b, 0x65, 0x79, 0x73, 0x74, 0x6f, 0x72,
0x65, 0x20, 0x53, 0x6f, 0x66, 0x74, 0x77, 0x61, 0x72, 0x65, 0x20, 0x41, 0x74, 0x74, 0x65, 0x73,
0x74, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x20, 0x49, 0x6e, 0x74, 0x65, 0x72, 0x6d, 0x65, 0x64, 0x69,
0x61, 0x74, 0x65, 0x30, 0x59, 0x30, 0x13, 0x06, 0x07, 0x2a, 0x86, 0x48, 0xce, 0x3d, 0x02, 0x01,
0x06, 0x08, 0x2a, 0x86, 0x48, 0xce, 0x3d, 0x03, 0x01, 0x07, 0x03, 0x42, 0x00, 0x04, 0xeb, 0x9e,
0x79, 0xf8, 0x42, 0x63, 0x59, 0xac, 0xcb, 0x2a, 0x91, 0x4c, 0x89, 0x86, 0xcc, 0x70, 0xad, 0x90,
0x66, 0x93, 0x82, 0xa9, 0x73, 0x26, 0x13, 0xfe, 0xac, 0xcb, 0xf8, 0x21, 0x27, 0x4c, 0x21, 0x74,
0x97, 0x4a, 0x2a, 0xfe, 0xa5, 0xb9, 0x4d, 0x7f, 0x66, 0xd4, 0xe0, 0x65, 0x10, 0x66, 0x35, 0xbc,
0x53, 0xb7, 0xa0, 0xa3, 0xa6, 0x71, 0x58, 0x3e, 0xdb, 0x3e, 0x11, 0xae, 0x10, 0x14, 0xa3, 0x66,
0x30, 0x64, 0x30, 0x1d, 0x06, 0x03, 0x55, 0x1d, 0x0e, 0x04, 0x16, 0x04, 0x14, 0x3f, 0xfc, 0xac,
0xd6, 0x1a, 0xb1, 0x3a, 0x9e, 0x81, 0x20, 0xb8, 0xd5, 0x25, 0x1c, 0xc5, 0x65, 0xbb, 0x1e, 0x91,
0xa9, 0x30, 0x1f, 0x06, 0x03, 0x55, 0x1d, 0x23, 0x04, 0x18, 0x30, 0x16, 0x80, 0x14, 0xc8, 0xad,
0xe9, 0x77, 0x4c, 0x45, 0xc3, 0xa3, 0xcf, 0x0d, 0x16, 0x10, 0xe4, 0x79, 0x43, 0x3a, 0x21, 0x5a,
0x30, 0xcf, 0x30, 0x12, 0x06, 0x03, 0x55, 0x1d, 0x13, 0x01, 0x01, 0xff, 0x04, 0x08, 0x30, 0x06,
0x01, 0x01, 0xff, 0x02, 0x01, 0x00, 0x30, 0x0e, 0x06, 0x03, 0x55, 0x1d, 0x0f, 0x01, 0x01, 0xff,
0x04, 0x04, 0x03, 0x02, 0x02, 0x84, 0x30, 0x0a, 0x06, 0x08, 0x2a, 0x86, 0x48, 0xce, 0x3d, 0x04,
0x03, 0x02, 0x03, 0x48, 0x00, 0x30, 0x45, 0x02, 0x20, 0x4b, 0x8a, 0x9b, 0x7b, 0xee, 0x82, 0xbc,
0xc0, 0x33, 0x87, 0xae, 0x2f, 0xc0, 0x89, 0x98, 0xb4, 0xdd, 0xc3, 0x8d, 0xab, 0x27, 0x2a, 0x45,
0x9f, 0x69, 0x0c, 0xc7, 0xc3, 0x92, 0xd4, 0x0f, 0x8e, 0x02, 0x21, 0x00, 0xee, 0xda, 0x01, 0x5d,
0xb6, 0xf4, 0x32, 0xe9, 0xd4, 0x84, 0x3b, 0x62, 0x4c, 0x94, 0x04, 0xef, 0x3a, 0x7c, 0xcc, 0xbd,
0x5e, 0xfb, 0x22, 0xbb, 0xe7, 0xfe, 0xb9, 0x77, 0x3f, 0x59, 0x3f, 0xfb,
};
static uint8_t kEcAttestRootCert[] = {
0x30, 0x82, 0x02, 0x8b, 0x30, 0x82, 0x02, 0x32, 0xa0, 0x03, 0x02, 0x01, 0x02, 0x02, 0x09, 0x00,
0xa2, 0x05, 0x9e, 0xd1, 0x0e, 0x43, 0x5b, 0x57, 0x30, 0x0a, 0x06, 0x08, 0x2a, 0x86, 0x48, 0xce,
0x3d, 0x04, 0x03, 0x02, 0x30, 0x81, 0x98, 0x31, 0x0b, 0x30, 0x09, 0x06, 0x03, 0x55, 0x04, 0x06,
0x13, 0x02, 0x55, 0x53, 0x31, 0x13, 0x30, 0x11, 0x06, 0x03, 0x55, 0x04, 0x08, 0x0c, 0x0a, 0x43,
0x61, 0x6c, 0x69, 0x66, 0x6f, 0x72, 0x6e, 0x69, 0x61, 0x31, 0x16, 0x30, 0x14, 0x06, 0x03, 0x55,
0x04, 0x07, 0x0c, 0x0d, 0x4d, 0x6f, 0x75, 0x6e, 0x74, 0x61, 0x69, 0x6e, 0x20, 0x56, 0x69, 0x65,
0x77, 0x31, 0x15, 0x30, 0x13, 0x06, 0x03, 0x55, 0x04, 0x0a, 0x0c, 0x0c, 0x47, 0x6f, 0x6f, 0x67,
0x6c, 0x65, 0x2c, 0x20, 0x49, 0x6e, 0x63, 0x2e, 0x31, 0x10, 0x30, 0x0e, 0x06, 0x03, 0x55, 0x04,
0x0b, 0x0c, 0x07, 0x41, 0x6e, 0x64, 0x72, 0x6f, 0x69, 0x64, 0x31, 0x33, 0x30, 0x31, 0x06, 0x03,
0x55, 0x04, 0x03, 0x0c, 0x2a, 0x41, 0x6e, 0x64, 0x72, 0x6f, 0x69, 0x64, 0x20, 0x4b, 0x65, 0x79,
0x73, 0x74, 0x6f, 0x72, 0x65, 0x20, 0x53, 0x6f, 0x66, 0x74, 0x77, 0x61, 0x72, 0x65, 0x20, 0x41,
0x74, 0x74, 0x65, 0x73, 0x74, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x20, 0x52, 0x6f, 0x6f, 0x74, 0x30,
0x1e, 0x17, 0x0d, 0x31, 0x36, 0x30, 0x31, 0x31, 0x31, 0x30, 0x30, 0x34, 0x33, 0x35, 0x30, 0x5a,
0x17, 0x0d, 0x33, 0x36, 0x30, 0x31, 0x30, 0x36, 0x30, 0x30, 0x34, 0x33, 0x35, 0x30, 0x5a, 0x30,
0x81, 0x98, 0x31, 0x0b, 0x30, 0x09, 0x06, 0x03, 0x55, 0x04, 0x06, 0x13, 0x02, 0x55, 0x53, 0x31,
0x13, 0x30, 0x11, 0x06, 0x03, 0x55, 0x04, 0x08, 0x0c, 0x0a, 0x43, 0x61, 0x6c, 0x69, 0x66, 0x6f,
0x72, 0x6e, 0x69, 0x61, 0x31, 0x16, 0x30, 0x14, 0x06, 0x03, 0x55, 0x04, 0x07, 0x0c, 0x0d, 0x4d,
0x6f, 0x75, 0x6e, 0x74, 0x61, 0x69, 0x6e, 0x20, 0x56, 0x69, 0x65, 0x77, 0x31, 0x15, 0x30, 0x13,
0x06, 0x03, 0x55, 0x04, 0x0a, 0x0c, 0x0c, 0x47, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2c, 0x20, 0x49,
0x6e, 0x63, 0x2e, 0x31, 0x10, 0x30, 0x0e, 0x06, 0x03, 0x55, 0x04, 0x0b, 0x0c, 0x07, 0x41, 0x6e,
0x64, 0x72, 0x6f, 0x69, 0x64, 0x31, 0x33, 0x30, 0x31, 0x06, 0x03, 0x55, 0x04, 0x03, 0x0c, 0x2a,
0x41, 0x6e, 0x64, 0x72, 0x6f, 0x69, 0x64, 0x20, 0x4b, 0x65, 0x79, 0x73, 0x74, 0x6f, 0x72, 0x65,
0x20, 0x53, 0x6f, 0x66, 0x74, 0x77, 0x61, 0x72, 0x65, 0x20, 0x41, 0x74, 0x74, 0x65, 0x73, 0x74,
0x61, 0x74, 0x69, 0x6f, 0x6e, 0x20, 0x52, 0x6f, 0x6f, 0x74, 0x30, 0x59, 0x30, 0x13, 0x06, 0x07,
0x2a, 0x86, 0x48, 0xce, 0x3d, 0x02, 0x01, 0x06, 0x08, 0x2a, 0x86, 0x48, 0xce, 0x3d, 0x03, 0x01,
0x07, 0x03, 0x42, 0x00, 0x04, 0xee, 0x5d, 0x5e, 0xc7, 0xe1, 0xc0, 0xdb, 0x6d, 0x03, 0xa6, 0x7e,
0xe6, 0xb6, 0x1b, 0xec, 0x4d, 0x6a, 0x5d, 0x6a, 0x68, 0x2e, 0x0f, 0xff, 0x7f, 0x49, 0x0e, 0x7d,
0x77, 0x1f, 0x44, 0x22, 0x6d, 0xbd, 0xb1, 0xaf, 0xfa, 0x16, 0xcb, 0xc7, 0xad, 0xc5, 0x77, 0xd2,
0x56, 0x9c, 0xaa, 0xb7, 0xb0, 0x2d, 0x54, 0x01, 0x5d, 0x3e, 0x43, 0x2b, 0x2a, 0x8e, 0xd7, 0x4e,
0xec, 0x48, 0x75, 0x41, 0xa4, 0xa3, 0x63, 0x30, 0x61, 0x30, 0x1d, 0x06, 0x03, 0x55, 0x1d, 0x0e,
0x04, 0x16, 0x04, 0x14, 0xc8, 0xad, 0xe9, 0x77, 0x4c, 0x45, 0xc3, 0xa3, 0xcf, 0x0d, 0x16, 0x10,
0xe4, 0x79, 0x43, 0x3a, 0x21, 0x5a, 0x30, 0xcf, 0x30, 0x1f, 0x06, 0x03, 0x55, 0x1d, 0x23, 0x04,
0x18, 0x30, 0x16, 0x80, 0x14, 0xc8, 0xad, 0xe9, 0x77, 0x4c, 0x45, 0xc3, 0xa3, 0xcf, 0x0d, 0x16,
0x10, 0xe4, 0x79, 0x43, 0x3a, 0x21, 0x5a, 0x30, 0xcf, 0x30, 0x0f, 0x06, 0x03, 0x55, 0x1d, 0x13,
0x01, 0x01, 0xff, 0x04, 0x05, 0x30, 0x03, 0x01, 0x01, 0xff, 0x30, 0x0e, 0x06, 0x03, 0x55, 0x1d,
0x0f, 0x01, 0x01, 0xff, 0x04, 0x04, 0x03, 0x02, 0x02, 0x84, 0x30, 0x0a, 0x06, 0x08, 0x2a, 0x86,
0x48, 0xce, 0x3d, 0x04, 0x03, 0x02, 0x03, 0x47, 0x00, 0x30, 0x44, 0x02, 0x20, 0x35, 0x21, 0xa3,
0xef, 0x8b, 0x34, 0x46, 0x1e, 0x9c, 0xd5, 0x60, 0xf3, 0x1d, 0x58, 0x89, 0x20, 0x6a, 0xdc, 0xa3,
0x65, 0x41, 0xf6, 0x0d, 0x9e, 0xce, 0x8a, 0x19, 0x8c, 0x66, 0x48, 0x60, 0x7b, 0x02, 0x20, 0x4d,
0x0b, 0xf3, 0x51, 0xd9, 0x30, 0x7c, 0x7d, 0x5b, 0xda, 0x35, 0x34, 0x1d, 0xa8, 0x47, 0x1b, 0x63,
0xa5, 0x85, 0x65, 0x3c, 0xad, 0x4f, 0x24, 0xa7, 0xe7, 0x4d, 0xaf, 0x41, 0x7d, 0xf1, 0xbf,
};
size_t kCertificateChainLength = 2;
bool UpgradeIntegerTag(keymaster_tag_t tag, uint32_t value, AuthorizationSet* set,
bool* set_changed) {
int index = set->find(tag);
if (index == -1) {
keymaster_key_param_t param;
param.tag = tag;
param.integer = value;
set->push_back(param);
*set_changed = true;
return true;
}
if (set->params[index].integer > value)
return false;
if (set->params[index].integer != value) {
set->params[index].integer = value;
*set_changed = true;
}
return true;
}
} // anonymous namespace
SoftKeymasterContext::SoftKeymasterContext(const std::string& root_of_trust)
: rsa_factory_(new RsaKeyFactory(this)), ec_factory_(new EcKeyFactory(this)),
aes_factory_(new AesKeyFactory(this)), hmac_factory_(new HmacKeyFactory(this)),
km1_dev_(nullptr), root_of_trust_(root_of_trust), os_version_(0), os_patchlevel_(0) {}
SoftKeymasterContext::~SoftKeymasterContext() {}
keymaster_error_t SoftKeymasterContext::SetHardwareDevice(keymaster0_device_t* keymaster0_device) {
if (!keymaster0_device)
return KM_ERROR_UNEXPECTED_NULL_POINTER;
if ((keymaster0_device->flags & KEYMASTER_SOFTWARE_ONLY) != 0) {
LOG_E("SoftKeymasterContext only wraps hardware keymaster0 devices", 0);
return KM_ERROR_INVALID_ARGUMENT;
}
km0_engine_.reset(new Keymaster0Engine(keymaster0_device));
rsa_factory_.reset(new RsaKeymaster0KeyFactory(this, km0_engine_.get()));
ec_factory_.reset(new EcdsaKeymaster0KeyFactory(this, km0_engine_.get()));
// Keep AES and HMAC factories.
return KM_ERROR_OK;
}
keymaster_error_t SoftKeymasterContext::SetHardwareDevice(keymaster1_device_t* keymaster1_device) {
if (!keymaster1_device)
return KM_ERROR_UNEXPECTED_NULL_POINTER;
km1_dev_ = keymaster1_device;
km1_engine_.reset(new Keymaster1Engine(keymaster1_device));
rsa_factory_.reset(new RsaKeymaster1KeyFactory(this, km1_engine_.get()));
ec_factory_.reset(new EcdsaKeymaster1KeyFactory(this, km1_engine_.get()));
// All AES and HMAC operations should be passed directly to the keymaster1 device. Explicitly
// do not handle them, to provoke errors in case the higher layers fail to send them to the
// device.
aes_factory_.reset(nullptr);
hmac_factory_.reset(nullptr);
return KM_ERROR_OK;
}
keymaster_error_t SoftKeymasterContext::SetSystemVersion(uint32_t os_version,
uint32_t os_patchlevel) {
os_version_ = os_version;
os_patchlevel_ = os_patchlevel;
return KM_ERROR_OK;
}
void SoftKeymasterContext::GetSystemVersion(uint32_t* os_version, uint32_t* os_patchlevel) const {
*os_version = os_version_;
*os_patchlevel = os_patchlevel_;
}
KeyFactory* SoftKeymasterContext::GetKeyFactory(keymaster_algorithm_t algorithm) const {
switch (algorithm) {
case KM_ALGORITHM_RSA:
return rsa_factory_.get();
case KM_ALGORITHM_EC:
return ec_factory_.get();
case KM_ALGORITHM_AES:
return aes_factory_.get();
case KM_ALGORITHM_HMAC:
return hmac_factory_.get();
default:
return nullptr;
}
}
static keymaster_algorithm_t supported_algorithms[] = {KM_ALGORITHM_RSA, KM_ALGORITHM_EC,
KM_ALGORITHM_AES, KM_ALGORITHM_HMAC};
keymaster_algorithm_t*
SoftKeymasterContext::GetSupportedAlgorithms(size_t* algorithms_count) const {
*algorithms_count = array_length(supported_algorithms);
return supported_algorithms;
}
OperationFactory* SoftKeymasterContext::GetOperationFactory(keymaster_algorithm_t algorithm,
keymaster_purpose_t purpose) const {
KeyFactory* key_factory = GetKeyFactory(algorithm);
if (!key_factory)
return nullptr;
return key_factory->GetOperationFactory(purpose);
}
static keymaster_error_t TranslateAuthorizationSetError(AuthorizationSet::Error err) {
switch (err) {
case AuthorizationSet::OK:
return KM_ERROR_OK;
case AuthorizationSet::ALLOCATION_FAILURE:
return KM_ERROR_MEMORY_ALLOCATION_FAILED;
case AuthorizationSet::MALFORMED_DATA:
return KM_ERROR_UNKNOWN_ERROR;
}
return KM_ERROR_OK;
}
static keymaster_error_t SetAuthorizations(const AuthorizationSet& key_description,
keymaster_key_origin_t origin, uint32_t os_version,
uint32_t os_patchlevel, AuthorizationSet* hw_enforced,
AuthorizationSet* sw_enforced) {
sw_enforced->Clear();
for (auto& entry : key_description) {
switch (entry.tag) {
// These cannot be specified by the client.
case KM_TAG_ROOT_OF_TRUST:
case KM_TAG_ORIGIN:
LOG_E("Root of trust and origin tags may not be specified", 0);
return KM_ERROR_INVALID_TAG;
// These don't work.
case KM_TAG_ROLLBACK_RESISTANT:
LOG_E("KM_TAG_ROLLBACK_RESISTANT not supported", 0);
return KM_ERROR_UNSUPPORTED_TAG;
// These are hidden.
case KM_TAG_APPLICATION_ID:
case KM_TAG_APPLICATION_DATA:
break;
// Everything else we just copy into sw_enforced, unless the KeyFactory has placed it in
// hw_enforced, in which case we defer to its decision.
default:
if (hw_enforced->GetTagCount(entry.tag) == 0)
sw_enforced->push_back(entry);
break;
}
}
sw_enforced->push_back(TAG_CREATION_DATETIME, java_time(time(NULL)));
sw_enforced->push_back(TAG_ORIGIN, origin);
sw_enforced->push_back(TAG_OS_VERSION, os_version);
sw_enforced->push_back(TAG_OS_PATCHLEVEL, os_patchlevel);
return TranslateAuthorizationSetError(sw_enforced->is_valid());
}
keymaster_error_t SoftKeymasterContext::CreateKeyBlob(const AuthorizationSet& key_description,
const keymaster_key_origin_t origin,
const KeymasterKeyBlob& key_material,
KeymasterKeyBlob* blob,
AuthorizationSet* hw_enforced,
AuthorizationSet* sw_enforced) const {
keymaster_error_t error = SetAuthorizations(key_description, origin, os_version_,
os_patchlevel_, hw_enforced, sw_enforced);
if (error != KM_ERROR_OK)
return error;
AuthorizationSet hidden;
error = BuildHiddenAuthorizations(key_description, &hidden);
if (error != KM_ERROR_OK)
return error;
return SerializeIntegrityAssuredBlob(key_material, hidden, *hw_enforced, *sw_enforced, blob);
}
keymaster_error_t SoftKeymasterContext::UpgradeKeyBlob(const KeymasterKeyBlob& key_to_upgrade,
const AuthorizationSet& upgrade_params,
KeymasterKeyBlob* upgraded_key) const {
KeymasterKeyBlob key_material;
AuthorizationSet tee_enforced;
AuthorizationSet sw_enforced;
keymaster_error_t error =
ParseKeyBlob(key_to_upgrade, upgrade_params, &key_material, &tee_enforced, &sw_enforced);
if (error != KM_ERROR_OK)
return error;
// Three cases here:
//
// 1. Software key blob. Version info, if present, is in sw_enforced. If not present, we
// should add it.
//
// 2. Keymaster0 hardware key blob. Version info, if present, is in sw_enforced. If not
// present we should add it.
//
// 3. Keymaster1 hardware key blob. Version info is not present and we shouldn't have been
// asked to upgrade.
// Handle case 3.
if (km1_dev_ && tee_enforced.Contains(TAG_PURPOSE) && !tee_enforced.Contains(TAG_OS_PATCHLEVEL))
return KM_ERROR_INVALID_ARGUMENT;
// Handle cases 1 & 2.
bool set_changed = false;
if (!UpgradeIntegerTag(TAG_OS_VERSION, os_version_, &sw_enforced, &set_changed) ||
!UpgradeIntegerTag(TAG_OS_PATCHLEVEL, os_patchlevel_, &sw_enforced, &set_changed))
// One of the version fields would have been a downgrade. Not allowed.
return KM_ERROR_INVALID_ARGUMENT;
if (!set_changed)
// Dont' need an upgrade.
return KM_ERROR_OK;
AuthorizationSet hidden;
error = BuildHiddenAuthorizations(upgrade_params, &hidden);
if (error != KM_ERROR_OK)
return error;
return SerializeIntegrityAssuredBlob(key_material, hidden, tee_enforced, sw_enforced,
upgraded_key);
}
static keymaster_error_t ParseOcbAuthEncryptedBlob(const KeymasterKeyBlob& blob,
const AuthorizationSet& hidden,
KeymasterKeyBlob* key_material,
AuthorizationSet* hw_enforced,
AuthorizationSet* sw_enforced) {
Buffer nonce, tag;
KeymasterKeyBlob encrypted_key_material;
keymaster_error_t error = DeserializeAuthEncryptedBlob(blob, &encrypted_key_material,
hw_enforced, sw_enforced, &nonce, &tag);
if (error != KM_ERROR_OK)
return error;
if (nonce.available_read() != OCB_NONCE_LENGTH || tag.available_read() != OCB_TAG_LENGTH)
return KM_ERROR_INVALID_KEY_BLOB;
return OcbDecryptKey(*hw_enforced, *sw_enforced, hidden, MASTER_KEY, encrypted_key_material,
nonce, tag, key_material);
}
// Note: This parsing code in below is from system/security/softkeymaster/keymaster_openssl.cpp's
// unwrap_key function, modified for the preferred function signature and formatting. It does some
// odd things, but they have been left unchanged to avoid breaking compatibility.
static const uint8_t SOFT_KEY_MAGIC[] = {'P', 'K', '#', '8'};
keymaster_error_t SoftKeymasterContext::ParseOldSoftkeymasterBlob(
const KeymasterKeyBlob& blob, KeymasterKeyBlob* key_material, AuthorizationSet* hw_enforced,
AuthorizationSet* sw_enforced) const {
long publicLen = 0;
long privateLen = 0;
const uint8_t* p = blob.key_material;
const uint8_t* end = blob.key_material + blob.key_material_size;
int type = 0;
ptrdiff_t min_size =
sizeof(SOFT_KEY_MAGIC) + sizeof(type) + sizeof(publicLen) + 1 + sizeof(privateLen) + 1;
if (end - p < min_size) {
LOG_W("key blob appears to be truncated (if an old SW key)", 0);
return KM_ERROR_INVALID_KEY_BLOB;
}
if (memcmp(p, SOFT_KEY_MAGIC, sizeof(SOFT_KEY_MAGIC)) != 0)
return KM_ERROR_INVALID_KEY_BLOB;
p += sizeof(SOFT_KEY_MAGIC);
for (size_t i = 0; i < sizeof(type); i++)
type = (type << 8) | *p++;
for (size_t i = 0; i < sizeof(type); i++)
publicLen = (publicLen << 8) | *p++;
if (p + publicLen > end) {
LOG_W("public key length encoding error: size=%ld, end=%td", publicLen, end - p);
return KM_ERROR_INVALID_KEY_BLOB;
}
p += publicLen;
if (end - p < 2) {
LOG_W("key blob appears to be truncated (if an old SW key)", 0);
return KM_ERROR_INVALID_KEY_BLOB;
}
for (size_t i = 0; i < sizeof(type); i++)
privateLen = (privateLen << 8) | *p++;
if (p + privateLen > end) {
LOG_W("private key length encoding error: size=%ld, end=%td", privateLen, end - p);
return KM_ERROR_INVALID_KEY_BLOB;
}
// Just to be sure, make sure that the ASN.1 structure parses correctly. We don't actually use
// the EVP_PKEY here.
unique_ptr<EVP_PKEY, EVP_PKEY_Delete> pkey(EVP_PKEY_new());
if (pkey.get() == nullptr)
return KM_ERROR_MEMORY_ALLOCATION_FAILED;
EVP_PKEY* tmp = pkey.get();
const uint8_t* key_start = p;
if (d2i_PrivateKey(type, &tmp, &p, privateLen) == NULL) {
LOG_W("Failed to parse PKCS#8 key material (if old SW key)", 0);
return KM_ERROR_INVALID_KEY_BLOB;
}
// All auths go into sw_enforced, including those that would be HW-enforced if we were faking
// auths for a HW-backed key.
hw_enforced->Clear();
keymaster_error_t error = FakeKeyAuthorizations(pkey.get(), sw_enforced, sw_enforced);
if (error != KM_ERROR_OK)
return error;
if (!key_material->Reset(privateLen))
return KM_ERROR_MEMORY_ALLOCATION_FAILED;
memcpy(key_material->writable_data(), key_start, privateLen);
return KM_ERROR_OK;
}
keymaster_error_t SoftKeymasterContext::ParseKeyBlob(const KeymasterKeyBlob& blob,
const AuthorizationSet& additional_params,
KeymasterKeyBlob* key_material,
AuthorizationSet* hw_enforced,
AuthorizationSet* sw_enforced) const {
// This is a little bit complicated.
//
// The SoftKeymasterContext has to handle a lot of different kinds of key blobs.
//
// 1. New keymaster1 software key blobs. These are integrity-assured but not encrypted. The
// raw key material and auth sets should be extracted and returned. This is the kind
// produced by this context when the KeyFactory doesn't use keymaster0 to back the keys.
//
// 2. Old keymaster1 software key blobs. These are OCB-encrypted with an all-zero master key.
// They should be decrypted and the key material and auth sets extracted and returned.
//
// 3. Old keymaster0 software key blobs. These are raw key material with a small header tacked
// on the front. They don't have auth sets, so reasonable defaults are generated and
// returned along with the raw key material.
//
// 4. New keymaster0 hardware key blobs. These are integrity-assured but not encrypted (though
// they're protected by the keymaster0 hardware implementation). The keymaster0 key blob
// and auth sets should be extracted and returned.
//
// 5. Keymaster1 hardware key blobs. These are raw hardware key blobs. They contain auth
// sets, which we retrieve from the hardware module.
//
// 6. Old keymaster0 hardware key blobs. These are raw hardware key blobs. They don't have
// auth sets so reasonable defaults are generated and returned along with the key blob.
//
// Determining what kind of blob has arrived is somewhat tricky. What helps is that
// integrity-assured and OCB-encrypted blobs are self-consistent and effectively impossible to
// parse as anything else. Old keymaster0 software key blobs have a header. It's reasonably
// unlikely that hardware keys would have the same header. So anything that is neither
// integrity-assured nor OCB-encrypted and lacks the old software key header is assumed to be
// keymaster0 hardware.
AuthorizationSet hidden;
keymaster_error_t error = BuildHiddenAuthorizations(additional_params, &hidden);
if (error != KM_ERROR_OK)
return error;
// Assume it's an integrity-assured blob (new software-only blob, or new keymaster0-backed
// blob).
error = DeserializeIntegrityAssuredBlob(blob, hidden, key_material, hw_enforced, sw_enforced);
if (error != KM_ERROR_INVALID_KEY_BLOB)
return error;
// Wasn't an integrity-assured blob. Maybe it's an OCB-encrypted blob.
error = ParseOcbAuthEncryptedBlob(blob, hidden, key_material, hw_enforced, sw_enforced);
if (error == KM_ERROR_OK)
LOG_D("Parsed an old keymaster1 software key", 0);
if (error != KM_ERROR_INVALID_KEY_BLOB)
return error;
// Wasn't an OCB-encrypted blob. Maybe it's an old softkeymaster blob.
error = ParseOldSoftkeymasterBlob(blob, key_material, hw_enforced, sw_enforced);
if (error == KM_ERROR_OK)
LOG_D("Parsed an old sofkeymaster key", 0);
if (error != KM_ERROR_INVALID_KEY_BLOB)
return error;
if (km1_dev_)
return ParseKeymaster1HwBlob(blob, additional_params, key_material, hw_enforced,
sw_enforced);
else if (km0_engine_)
return ParseKeymaster0HwBlob(blob, key_material, hw_enforced, sw_enforced);
LOG_E("Failed to parse key; not a valid software blob, no hardware module configured", 0);
return KM_ERROR_INVALID_KEY_BLOB;
}
keymaster_error_t SoftKeymasterContext::DeleteKey(const KeymasterKeyBlob& blob) const {
if (km1_engine_) {
keymaster_error_t error = km1_engine_->DeleteKey(blob);
if (error == KM_ERROR_INVALID_KEY_BLOB) {
// Note that we succeed on invalid blob, because it probably just indicates that the
// blob is a software blob, not a hardware blob.
error = KM_ERROR_OK;
}
return error;
}
if (km0_engine_) {
// This could be a keymaster0 hardware key, and it could be either raw or encapsulated in an
// integrity-assured blob. If it's integrity-assured, we can't validate it strongly,
// because we don't have the necessary additional_params data. However, the probability
// that anything other than an integrity-assured blob would have all of the structure
// required to decode as a valid blob is low -- unless it's maliciously-constructed, but the
// deserializer should be proof against bad data, as should the keymaster0 hardware.
//
// Thus, we first try to parse it as integrity-assured. If that works, we pass the result
// to the underlying hardware. If not, we pass blob unmodified to the underlying hardware.
KeymasterKeyBlob key_material;
AuthorizationSet hw_enforced, sw_enforced;
keymaster_error_t error = DeserializeIntegrityAssuredBlob_NoHmacCheck(
blob, &key_material, &hw_enforced, &sw_enforced);
if (error == KM_ERROR_OK && km0_engine_->DeleteKey(key_material))
return KM_ERROR_OK;
km0_engine_->DeleteKey(blob);
// We succeed unconditionally at this point, even if delete failed. Failure indicates that
// either the blob is a software blob (which we can't distinguish with certainty without
// additional_params) or because it is a hardware blob and the hardware failed. In the
// first case, there is no error. In the second case, the client can't do anything to fix
// it anyway, so it's not too harmful to simply swallow the error. This is not ideal, but
// it's the least-bad alternative.
return KM_ERROR_OK;
}
// Nothing to do for software-only contexts.
return KM_ERROR_OK;
}
keymaster_error_t SoftKeymasterContext::DeleteAllKeys() const {
if (km1_engine_)
return km1_engine_->DeleteAllKeys();
if (km0_engine_ && !km0_engine_->DeleteAllKeys())
return KM_ERROR_UNKNOWN_ERROR;
return KM_ERROR_OK;
}
keymaster_error_t SoftKeymasterContext::AddRngEntropy(const uint8_t* buf, size_t length) const {
RAND_add(buf, length, 0 /* Don't assume any entropy is added to the pool. */);
return KM_ERROR_OK;
}
keymaster_error_t SoftKeymasterContext::GenerateRandom(uint8_t* buf, size_t length) const {
if (RAND_bytes(buf, length) != 1)
return KM_ERROR_UNKNOWN_ERROR;
return KM_ERROR_OK;
}
void SoftKeymasterContext::AddSystemVersionToSet(AuthorizationSet* auth_set) const {
if (!auth_set->Contains(TAG_OS_VERSION))
auth_set->push_back(TAG_OS_VERSION, os_version_);
if (!auth_set->Contains(TAG_OS_PATCHLEVEL))
auth_set->push_back(TAG_OS_PATCHLEVEL, os_patchlevel_);
}
EVP_PKEY* SoftKeymasterContext::AttestationKey(keymaster_algorithm_t algorithm,
keymaster_error_t* error) const {
const uint8_t* key;
size_t key_length;
int evp_key_type;
switch (algorithm) {
case KM_ALGORITHM_RSA:
key = kRsaAttestKey;
key_length = array_length(kRsaAttestKey);
evp_key_type = EVP_PKEY_RSA;
break;
case KM_ALGORITHM_EC:
key = kEcAttestKey;
key_length = array_length(kEcAttestKey);
evp_key_type = EVP_PKEY_EC;
break;
default:
*error = KM_ERROR_UNSUPPORTED_ALGORITHM;
return nullptr;
}
EVP_PKEY* pkey = d2i_PrivateKey(evp_key_type, nullptr /* pkey */, &key, key_length);
if (!pkey)
*error = TranslateLastOpenSslError();
return pkey;
}
keymaster_cert_chain_t* SoftKeymasterContext::AttestationChain(keymaster_algorithm_t algorithm,
keymaster_error_t* error) const {
// If we have to bail it will be because of an allocation failure.
*error = KM_ERROR_MEMORY_ALLOCATION_FAILED;
UniquePtr<keymaster_cert_chain_t, CertificateChainDelete> chain(new keymaster_cert_chain_t);
if (!chain.get())
return nullptr;
memset(chain.get(), 0, sizeof(keymaster_cert_chain_t));
chain->entries = new keymaster_blob_t[kCertificateChainLength];
if (!chain->entries)
return nullptr;
memset(chain->entries, 0, sizeof(chain->entries[0]) * kCertificateChainLength);
chain->entry_count = kCertificateChainLength;
size_t entry = 0;
switch (algorithm) {
case KM_ALGORITHM_RSA:
chain->entries[entry].data = dup_array(kRsaAttestCert);
if (!chain->entries[entry].data)
return nullptr;
chain->entries[entry].data_length = array_length(kRsaAttestCert);
entry++;
chain->entries[entry].data = dup_array(kRsaAttestRootCert);
if (!chain->entries[entry].data)
return nullptr;
chain->entries[entry].data_length = array_length(kRsaAttestRootCert);
entry++;
break;
case KM_ALGORITHM_EC:
chain->entries[entry].data = dup_array(kEcAttestCert);
if (!chain->entries[entry].data)
return nullptr;
chain->entries[entry].data_length = array_length(kEcAttestCert);
entry++;
chain->entries[entry].data = dup_array(kEcAttestRootCert);
if (!chain->entries[entry].data)
return nullptr;
chain->entries[entry].data_length = array_length(kEcAttestRootCert);
entry++;
break;
default:
*error = KM_ERROR_UNSUPPORTED_ALGORITHM;
return nullptr;
};
assert(entry == kCertificateChainLength);
*error = KM_ERROR_OK;
return chain.release();
}
keymaster_error_t SoftKeymasterContext::GenerateUniqueId(
uint64_t /* creation_date_time */, const keymaster_blob_t& /* application_id */,
bool /* reset_since_rotation */, Buffer* /* unique_id */) const {
// SoftKeymasterDevice cannot generate unique IDs.
return KM_ERROR_UNIMPLEMENTED;
}
keymaster_error_t SoftKeymasterContext::ParseKeymaster1HwBlob(
const KeymasterKeyBlob& blob, const AuthorizationSet& additional_params,
KeymasterKeyBlob* key_material, AuthorizationSet* hw_enforced,
AuthorizationSet* sw_enforced) const {
assert(km1_dev_);
keymaster_blob_t client_id = {nullptr, 0};
keymaster_blob_t app_data = {nullptr, 0};
keymaster_blob_t* client_id_ptr = nullptr;
keymaster_blob_t* app_data_ptr = nullptr;
if (additional_params.GetTagValue(TAG_APPLICATION_ID, &client_id))
client_id_ptr = &client_id;
if (additional_params.GetTagValue(TAG_APPLICATION_DATA, &app_data))
app_data_ptr = &app_data;
// Get key characteristics, which incidentally verifies that the HW recognizes the key.
keymaster_key_characteristics_t* characteristics;
keymaster_error_t error = km1_dev_->get_key_characteristics(km1_dev_, &blob, client_id_ptr,
app_data_ptr, &characteristics);
if (error != KM_ERROR_OK)
return error;
unique_ptr<keymaster_key_characteristics_t, Characteristics_Delete> characteristics_deleter(
characteristics);
LOG_D("Module \"%s\" accepted key", km1_dev_->common.module->name);
hw_enforced->Reinitialize(characteristics->hw_enforced);
sw_enforced->Reinitialize(characteristics->sw_enforced);
*key_material = blob;
return KM_ERROR_OK;
}
keymaster_error_t SoftKeymasterContext::ParseKeymaster0HwBlob(const KeymasterKeyBlob& blob,
KeymasterKeyBlob* key_material,
AuthorizationSet* hw_enforced,
AuthorizationSet* sw_enforced) const {
assert(km0_engine_);
unique_ptr<EVP_PKEY, EVP_PKEY_Delete> tmp_key(km0_engine_->GetKeymaster0PublicKey(blob));
if (!tmp_key)
return KM_ERROR_INVALID_KEY_BLOB;
LOG_D("Module \"%s\" accepted key", km0_engine_->device()->common.module->name);
keymaster_error_t error = FakeKeyAuthorizations(tmp_key.get(), hw_enforced, sw_enforced);
if (error == KM_ERROR_OK)
*key_material = blob;
return error;
}
keymaster_error_t SoftKeymasterContext::FakeKeyAuthorizations(EVP_PKEY* pubkey,
AuthorizationSet* hw_enforced,
AuthorizationSet* sw_enforced) const {
hw_enforced->Clear();
sw_enforced->Clear();
switch (EVP_PKEY_type(pubkey->type)) {
case EVP_PKEY_RSA: {
hw_enforced->push_back(TAG_ALGORITHM, KM_ALGORITHM_RSA);
hw_enforced->push_back(TAG_DIGEST, KM_DIGEST_NONE);
hw_enforced->push_back(TAG_DIGEST, KM_DIGEST_MD5);
hw_enforced->push_back(TAG_DIGEST, KM_DIGEST_SHA1);
hw_enforced->push_back(TAG_DIGEST, KM_DIGEST_SHA_2_224);
hw_enforced->push_back(TAG_DIGEST, KM_DIGEST_SHA_2_256);
hw_enforced->push_back(TAG_DIGEST, KM_DIGEST_SHA_2_384);
hw_enforced->push_back(TAG_DIGEST, KM_DIGEST_SHA_2_512);
hw_enforced->push_back(TAG_PADDING, KM_PAD_NONE);
hw_enforced->push_back(TAG_PADDING, KM_PAD_RSA_PKCS1_1_5_SIGN);
hw_enforced->push_back(TAG_PADDING, KM_PAD_RSA_PKCS1_1_5_ENCRYPT);
hw_enforced->push_back(TAG_PADDING, KM_PAD_RSA_PSS);
hw_enforced->push_back(TAG_PADDING, KM_PAD_RSA_OAEP);
sw_enforced->push_back(TAG_PURPOSE, KM_PURPOSE_SIGN);
sw_enforced->push_back(TAG_PURPOSE, KM_PURPOSE_VERIFY);
sw_enforced->push_back(TAG_PURPOSE, KM_PURPOSE_ENCRYPT);
sw_enforced->push_back(TAG_PURPOSE, KM_PURPOSE_DECRYPT);
unique_ptr<RSA, RSA_Delete> rsa(EVP_PKEY_get1_RSA(pubkey));
if (!rsa)
return TranslateLastOpenSslError();
hw_enforced->push_back(TAG_KEY_SIZE, RSA_size(rsa.get()) * 8);
uint64_t public_exponent = BN_get_word(rsa->e);
if (public_exponent == 0xffffffffL)
return KM_ERROR_INVALID_KEY_BLOB;
hw_enforced->push_back(TAG_RSA_PUBLIC_EXPONENT, public_exponent);
break;
}
case EVP_PKEY_EC: {
hw_enforced->push_back(TAG_ALGORITHM, KM_ALGORITHM_RSA);
hw_enforced->push_back(TAG_DIGEST, KM_DIGEST_NONE);
hw_enforced->push_back(TAG_DIGEST, KM_DIGEST_MD5);
hw_enforced->push_back(TAG_DIGEST, KM_DIGEST_SHA1);
hw_enforced->push_back(TAG_DIGEST, KM_DIGEST_SHA_2_224);
hw_enforced->push_back(TAG_DIGEST, KM_DIGEST_SHA_2_256);
hw_enforced->push_back(TAG_DIGEST, KM_DIGEST_SHA_2_384);
hw_enforced->push_back(TAG_DIGEST, KM_DIGEST_SHA_2_512);
sw_enforced->push_back(TAG_PURPOSE, KM_PURPOSE_SIGN);
sw_enforced->push_back(TAG_PURPOSE, KM_PURPOSE_VERIFY);
UniquePtr<EC_KEY, EC_KEY_Delete> ec_key(EVP_PKEY_get1_EC_KEY(pubkey));
if (!ec_key.get())
return TranslateLastOpenSslError();
size_t key_size_bits;
keymaster_error_t error =
ec_get_group_size(EC_KEY_get0_group(ec_key.get()), &key_size_bits);
if (error != KM_ERROR_OK)
return error;
hw_enforced->push_back(TAG_KEY_SIZE, key_size_bits);
break;
}
default:
return KM_ERROR_UNSUPPORTED_ALGORITHM;
}
sw_enforced->push_back(TAG_ALL_USERS);
sw_enforced->push_back(TAG_NO_AUTH_REQUIRED);
return KM_ERROR_OK;
}
keymaster_error_t SoftKeymasterContext::BuildHiddenAuthorizations(const AuthorizationSet& input_set,
AuthorizationSet* hidden) const {
keymaster_blob_t entry;
if (input_set.GetTagValue(TAG_APPLICATION_ID, &entry))
hidden->push_back(TAG_APPLICATION_ID, entry.data, entry.data_length);
if (input_set.GetTagValue(TAG_APPLICATION_DATA, &entry))
hidden->push_back(TAG_APPLICATION_DATA, entry.data, entry.data_length);
hidden->push_back(TAG_ROOT_OF_TRUST, reinterpret_cast<const uint8_t*>(root_of_trust_.data()),
root_of_trust_.size());
return TranslateAuthorizationSetError(hidden->is_valid());
}
} // namespace keymaster