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49 lines
1.6 KiB
C++
49 lines
1.6 KiB
C++
#include <gtest/gtest.h>
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#include <cstdint>
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#include "esphome/components/ble_device_base/ble_device.h"
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namespace esphome::ble_device_base::testing {
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// Reference vector generated with Python `cryptography` AES-128-ECB following
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// the RPA resolution procedure (Bluetooth Core, Vol 3 Part H §2.2.2):
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// hash = e(IRK, prand), where prand is the top 3 address bytes and the hash
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// must equal the low 3 address bytes.
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namespace {
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const uint8_t IRK[16] = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
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0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f};
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// 4A:2B:7C:FB:7B:21 — prand 4A:2B:7C (two MSBs = 01, an RPA), hash FB:7B:21.
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const uint8_t RPA_LSB_FIRST[6] = {0x21, 0x7b, 0xfb, 0x7c, 0x2b, 0x4a};
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ESPBTDevice make_device(const uint8_t mac_lsb_first[6]) {
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ESPBTDevice device;
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device.from_scan_result(mac_lsb_first, /*rssi=*/-60, /*addr_type=*/BLE_ADDR_TYPE_RPA_RANDOM, nullptr, 0);
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return device;
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}
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} // namespace
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TEST(BleIrk, ResolvesMatchingRpa) {
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ESPBTDevice device = make_device(RPA_LSB_FIRST);
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EXPECT_TRUE(device.resolve_irk(IRK));
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}
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TEST(BleIrk, RejectsWrongIrk) {
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uint8_t wrong_irk[16];
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for (int i = 0; i < 16; i++)
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wrong_irk[i] = IRK[i] ^ 0xff;
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ESPBTDevice device = make_device(RPA_LSB_FIRST);
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EXPECT_FALSE(device.resolve_irk(wrong_irk));
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}
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TEST(BleIrk, RejectsWrongAddress) {
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uint8_t other_mac[6];
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for (int i = 0; i < 6; i++)
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other_mac[i] = RPA_LSB_FIRST[i];
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other_mac[0] ^= 0x01; // corrupt one hash byte
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ESPBTDevice device = make_device(other_mac);
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EXPECT_FALSE(device.resolve_irk(IRK));
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}
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} // namespace esphome::ble_device_base::testing
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