암호화 테스트 사례
컬렉션을 사용해 정리하기
내 환경설정을 기준으로 콘텐츠를 저장하고 분류하세요.
이 페이지에서는 제공업체가 암호화를 확인하기 위해 작성할 수 있는 테스트를 설명합니다.
제공자 구현의 구성 요소를 정의합니다.
빠른 페어링 통합을 용이하게 하려면 이러한 테스트를 초기에 구현하는 것이 좋습니다.
테스트 사례
이러한 케이스에는 다음이 적용됩니다.
- 해싱
- 블룸 필터
- AES 암호화 및 공개 키 교환
- 메시지 암호화 및 해독
SHA-256 해싱
입력 값:
0x11, 0x22, 0x33, 0x44, 0x55, 0x66
해싱된 결과:
0xBB, 0x00, 0x0D, 0xDD, 0x92, 0xA0, 0xA2, 0xA3, 0x46, 0xF0, 0xB5, 0x31,
0xF2, 0x78, 0xAF, 0x06, 0xE3, 0x70, 0xF8, 0x69, 0x32, 0xCC, 0xAF, 0xCC,
0xC8, 0x92, 0xD6, 0x8D, 0x35, 0x0F, 0x80, 0xF8
AES 암호화
입력 값:
0xF3, 0x0F, 0x4E, 0x78, 0x6C, 0x59, 0xA7, 0xBB, 0xF3, 0x87, 0x3B, 0x5A,
0x49, 0xBA, 0x97, 0xEA
보안 비밀 키:
0xA0, 0xBA, 0xF0, 0xBB, 0x95, 0x1F, 0xF7, 0xB6, 0xCF, 0x5E, 0x3F, 0x45,
0x61, 0xC3, 0x32, 0x1D
암호화된 출력:
0xAC, 0x9A, 0x16, 0xF0, 0x95, 0x3A, 0x3F, 0x22, 0x3D, 0xD1, 0x0C, 0xF5,
0x36, 0xE0, 0x9E, 0x9C
ECDH 키 교환
밥의 비공개 키:
0x02, 0xB4, 0x37, 0xB0, 0xED, 0xD6, 0xBB, 0xD4, 0x29, 0x06, 0x4A, 0x4E,
0x52, 0x9F, 0xCB, 0xF1, 0xC4, 0x8D, 0x0D, 0x62, 0x49, 0x24, 0xD5, 0x92,
0x27, 0x4B, 0x7E, 0xD8, 0x11, 0x93, 0xD7, 0x63
밥의 공개 키:
0xF7, 0xD4, 0x96, 0xA6, 0x2E, 0xCA, 0x41, 0x63, 0x51, 0x54, 0x0A, 0xA3,
0x43, 0xBC, 0x69, 0x0A, 0x61, 0x09, 0xF5, 0x51, 0x50, 0x06, 0x66, 0xB8,
0x3B, 0x12, 0x51, 0xFB, 0x84, 0xFA, 0x28, 0x60, 0x79, 0x5E, 0xBD, 0x63,
0xD3, 0xB8, 0x83, 0x6F, 0x44, 0xA9, 0xA3, 0xE2, 0x8B, 0xB3, 0x40, 0x17,
0xE0, 0x15, 0xF5, 0x97, 0x93, 0x05, 0xD8, 0x49, 0xFD, 0xF8, 0xDE, 0x10,
0x12, 0x3B, 0x61, 0xD2
앨리스의 비공개 키:
0xD7, 0x5E, 0x54, 0xC7, 0x7D, 0x76, 0x24, 0x89, 0xE5, 0x7C, 0xFA, 0x92,
0x37, 0x43, 0xF1, 0x67, 0x77, 0xA4, 0x28, 0x3D, 0x99, 0x80, 0x0B, 0xAC,
0x55, 0x58, 0x48, 0x38, 0x93, 0xE5, 0xB0, 0x6D
앨리스의 공개 키:
0x36, 0xAC, 0x68, 0x2C, 0x50, 0x82, 0x15, 0x66, 0x8F, 0xBE, 0xFE, 0x24,
0x7D, 0x01, 0xD5, 0xEB, 0x96, 0xE6, 0x31, 0x8E, 0x85, 0x5B, 0x2D, 0x64,
0xB5, 0x19, 0x5D, 0x38, 0xEE, 0x7E, 0x37, 0xBE, 0x18, 0x38, 0xC0, 0xB9,
0x48, 0xC3, 0xF7, 0x55, 0x20, 0xE0, 0x7E, 0x70, 0xF0, 0x72, 0x91, 0x41,
0x9A, 0xCE, 0x2D, 0x28, 0x14, 0x3C, 0x5A, 0xDB, 0x2D, 0xBD, 0x98, 0xEE,
0x3C, 0x8E, 0x4F, 0xBF
생성된 공유 키 (앨리스의 공개 키 + 밥의 비공개 키 또는 밥의 공개 키)
공개 + 앨리스의 비공개)
0x9D, 0xAD, 0xE4, 0xF8, 0x6A, 0xC3, 0x48, 0x8B, 0xBA, 0xC2, 0xAC, 0x34,
0xB5, 0xFE, 0x68, 0xA0, 0xEE, 0x5A, 0x67, 0x06, 0xF5, 0x43, 0xD9, 0x06,
0x1A, 0xD5, 0x78, 0x89, 0x49, 0x8A, 0xE6, 0xBA
ECDH 공유 보안 비밀의 AES 키
GATT 절차의 1b단계 (AES 키 생성)입니다.
ECDH 공유 키:
0x9D, 0xAD, 0xE4, 0xF8, 0x6A, 0xC3, 0x48, 0x8B, 0xBA, 0xC2, 0xAC, 0x34,
0xB5, 0xFE, 0x68, 0xA0, 0xEE, 0x5A, 0x67, 0x06, 0xF5, 0x43, 0xD9, 0x06,
0x1A, 0xD5, 0x78, 0x89, 0x49, 0x8A, 0xE6, 0xBA
생성된 AES 키:
0xB0, 0x7F, 0x1F, 0x17, 0xC2, 0x36, 0xCB, 0xD3, 0x35, 0x23, 0xC5, 0x15,
0xF3, 0x50, 0xAE, 0x57
블룸 필터
랜덤 솔트:
0xC7C8
필터에 추가된 첫 번째 계정 키 (위의 임의의 솔트와 결합):
0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0x00, 0xAA, 0xBB,
0xCC, 0xDD, 0xEE, 0xFF
결과 블룸 필터:
0x02, 0x0C, 0x80, 0x2A
배터리 데이터 (광고에 포함된 경우):
0b00110011, // length = 3, show UI indication.
0b01000000, // left bud: not charging, battery level = 64.
0b01000000, // right bud: not charging, battery level = 64.
0b01000000 // case: not charging, battery level = 64.
배터리 데이터가 포함된 블룸 필터:
0x01, 0x01, 0x46, 0x0A
필터에 추가된 두 번째 계정 키 (위의 임의의 솔트와 결합):
0x11, 0x11, 0x22, 0x22, 0x33, 0x33, 0x44, 0x44, 0x55, 0x55, 0x66, 0x66,
0x77, 0x77, 0x88, 0x88
추가된 두 계정 키에서 발생하는 블룸 필터:
0x84, 0x4A, 0x62, 0x20, 0x8B
배터리 데이터 (광고에 포함된 경우):
0b00110011, // length = 3, show UI indication.
0b01000000, // left bud: not charging, battery level = 64.
0b01000000, // right bud: not charging, battery level = 64.
0b01000000 // case: not charging, battery level = 64.
배터리 데이터가 있는 추가된 두 계정 키에서 발생하는 블룸 필터:
0x46, 0x15, 0x24, 0xD0, 0x08
AES-CTR 암호화
입력 데이터: '다른 사람의 Google 헤드폰' utf-8 인코딩 포함
0x53, 0x6F, 0x6D, 0x65, 0x6F, 0x6E, 0x65, 0x27, 0x73, 0x20, 0x47, 0x6F,
0x6F, 0x67, 0x6C, 0x65, 0x20, 0x48, 0x65, 0x61, 0x64, 0x70, 0x68, 0x6F,
0x6E, 0x65
보안 비밀 키:
0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF, 0x01, 0x23, 0x45, 0x67,
0x89, 0xAB, 0xCD, 0xEF
nonce:
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07
예상 암호화 결과:
0xEE, 0x4A, 0x24, 0x83, 0x73, 0x80, 0x52, 0xE4, 0x4E, 0x9B, 0x2A, 0x14,
0x5E, 0x5D, 0xDF, 0xAA, 0x44, 0xB9, 0xE5, 0x53, 0x6A, 0xF4, 0x38, 0xE1,
0xE5, 0xC6
HMAC-SHA256
입력 데이터:
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0xEE, 0x4A, 0x24, 0x83,
0x73, 0x80, 0x52, 0xE4, 0x4E, 0x9B, 0x2A, 0x14, 0x5E, 0x5D, 0xDF, 0xAA,
0x44, 0xB9, 0xE5, 0x53, 0x6A, 0xF4, 0x38, 0xE1, 0xE5, 0xC6
보안 비밀 키:
0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF, 0x01, 0x23, 0x45, 0x67,
0x89, 0xAB, 0xCD, 0xEF
예상 HMAC-SHA256 결과:
0x55, 0xEC, 0x5E, 0x60, 0x55, 0xAF, 0x6E, 0x92, 0x61, 0x8B, 0x7D, 0x87,
0x10, 0xD4, 0x41, 0x37, 0x09, 0xAB, 0x5D, 0xA2, 0x7C, 0xA2, 0x6A, 0x66,
0xF5, 0x2E, 0x5A, 0xD4, 0xE8, 0x20, 0x90, 0x52
맞춤설정된 이름을 추가 데이터 패킷에 인코딩
입력 데이터: '다른 사람의 Google 헤드폰' utf-8 인코딩 포함
0x53, 0x6F, 0x6D, 0x65, 0x6F, 0x6E, 0x65, 0x27, 0x73, 0x20, 0x47, 0x6F,
0x6F, 0x67, 0x6C, 0x65, 0x20, 0x48, 0x65, 0x61, 0x64, 0x70, 0x68, 0x6F,
0x6E, 0x65
보안 비밀 키:
0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF, 0x01, 0x23, 0x45, 0x67,
0x89, 0xAB, 0xCD, 0xEF
nonce:
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07
예상되는 추가 데이터 패킷:
0x55, 0xEC, 0x5E, 0x60, 0x55, 0xAF, 0x6E, 0x92, 0x00, 0x01, 0x02, 0x03,
0x04, 0x05, 0x06, 0x07, 0xEE, 0x4A, 0x24, 0x83, 0x73, 0x80, 0x52, 0xE4,
0x4E, 0x9B, 0x2A, 0x14, 0x5E, 0x5D, 0xDF, 0xAA, 0x44, 0xB9, 0xE5, 0x53,
0x6A, 0xF4, 0x38, 0xE1, 0xE5, 0xC6
추가 데이터 패킷을 디코딩하여 맞춤설정된 이름 가져오기
입력 데이터:
0x55, 0xEC, 0x5E, 0x60, 0x55, 0xAF, 0x6E, 0x92, 0x00, 0x01, 0x02, 0x03,
0x04, 0x05, 0x06, 0x07, 0xEE, 0x4A, 0x24, 0x83, 0x73, 0x80, 0x52, 0xE4,
0x4E, 0x9B, 0x2A, 0x14, 0x5E, 0x5D, 0xDF, 0xAA, 0x44, 0xB9, 0xE5, 0x53,
0x6A, 0xF4, 0x38, 0xE1, 0xE5, 0xC6
보안 비밀 키:
0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF, 0x01, 0x23, 0x45, 0x67,
0x89, 0xAB, 0xCD, 0xEF
예상 이름: '누군가의 Google 헤드폰' utf-8 인코딩 포함
0x53, 0x6F, 0x6D, 0x65, 0x6F, 0x6E, 0x65, 0x27, 0x73, 0x20, 0x47, 0x6F,
0x6F, 0x67, 0x6C, 0x65, 0x20, 0x48, 0x65, 0x61, 0x64, 0x70, 0x68, 0x6F,
0x6E, 0x65
암호화된 연결 상태 필드
필드 길이 및 유형:
0b001100101 (length = 3, type = connection status field)
연결 상태:
0b10000101:
* on head detection = 1
* connection availability = 0
* focus mode = 0
* auto-reconnected = 0
* connection state = 0x5 (A2DP with AVRCP)
맞춤 데이터:
0x38
연결된 기기 비트맵:
0b00001001
연결 상태 필드 원시 데이터 (4바이트 이상 결합):
0x35853809
사용 중인 계정 키 (키):
0x04, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0x00, 0xAA, 0xBB,
0xCC, 0xDD, 0xEE, 0xFF
사용하지 않는 계정 키:
0x04, 0x11, 0x22, 0x22, 0x33, 0x33, 0x44, 0x44, 0x55, 0x55, 0x66, 0x66,
0x77, 0x77, 0x88, 0x88
랜덤 솔트:
0xC7C8
계정 키 필터 (IV):
사용 중인 계정 키를 0b00000100에서 0b00000110까지로 변경합니다.
0x8C, 0xA9, 0x0C, 0x08, 0x1C
암호화된 연결 상태 필드:
0xF4, 0xBB, 0x40, 0x6F
달리 명시되지 않는 한 이 페이지의 콘텐츠에는 Creative Commons Attribution 4.0 라이선스에 따라 라이선스가 부여되며, 코드 샘플에는 Apache 2.0 라이선스에 따라 라이선스가 부여됩니다. 자세한 내용은 Google Developers 사이트 정책을 참조하세요. 자바는 Oracle 및/또는 Oracle 계열사의 등록 상표입니다.
최종 업데이트: 2025-08-13(UTC)
[null,null,["최종 업데이트: 2025-08-13(UTC)"],[[["\u003cp\u003eThis page provides test cases for providers to validate the cryptographic aspects of their Fast Pair implementation, including hashing, Bloom filter generation, and encryption.\u003c/p\u003e\n"],["\u003cp\u003eGoogle advises incorporating these tests early in the development process for smoother Fast Pair integration.\u003c/p\u003e\n"],["\u003cp\u003eTest cases encompass SHA-256 hashing, Bloom filter construction with and without battery data, AES encryption and decryption, ECDH key exchange, and AES key derivation from ECDH shared secret.\u003c/p\u003e\n"],["\u003cp\u003eExamples and expected outputs are included for each test case, covering scenarios like personalized name encoding/decoding and connection status field encryption.\u003c/p\u003e\n"],["\u003cp\u003eSuccessful completion of these tests ensures the provider's implementation aligns with Fast Pair's security requirements.\u003c/p\u003e\n"]]],[],null,["# Cryptographic Test Cases\n\nThis page describes tests a provider can write to verify the cryptographic\ncomponents of their provider implementation.\n\nGoogle recommends implementing these tests early to ease Fast Pair integration.\n\nTest Cases\n----------\n\nThese cases cover:\n\n- Hashing\n- The Bloom Filter\n- AES Encryption and Public Key Exchange\n- Message enciphering and deciphering\n\n### SHA-256 Hashing\n\nInput value: \n\n 0x11, 0x22, 0x33, 0x44, 0x55, 0x66\n\nHashed result: \n\n 0xBB, 0x00, 0x0D, 0xDD, 0x92, 0xA0, 0xA2, 0xA3, 0x46, 0xF0, 0xB5, 0x31,\n 0xF2, 0x78, 0xAF, 0x06, 0xE3, 0x70, 0xF8, 0x69, 0x32, 0xCC, 0xAF, 0xCC,\n 0xC8, 0x92, 0xD6, 0x8D, 0x35, 0x0F, 0x80, 0xF8\n\n### AES Encryption\n\nInput value: \n\n 0xF3, 0x0F, 0x4E, 0x78, 0x6C, 0x59, 0xA7, 0xBB, 0xF3, 0x87, 0x3B, 0x5A,\n 0x49, 0xBA, 0x97, 0xEA\n\nSecret key: \n\n 0xA0, 0xBA, 0xF0, 0xBB, 0x95, 0x1F, 0xF7, 0xB6, 0xCF, 0x5E, 0x3F, 0x45,\n 0x61, 0xC3, 0x32, 0x1D\n\nEncrypted output: \n\n 0xAC, 0x9A, 0x16, 0xF0, 0x95, 0x3A, 0x3F, 0x22, 0x3D, 0xD1, 0x0C, 0xF5,\n 0x36, 0xE0, 0x9E, 0x9C\n\n### ECDH Key Exchange\n\nBob's private key: \n\n 0x02, 0xB4, 0x37, 0xB0, 0xED, 0xD6, 0xBB, 0xD4, 0x29, 0x06, 0x4A, 0x4E,\n 0x52, 0x9F, 0xCB, 0xF1, 0xC4, 0x8D, 0x0D, 0x62, 0x49, 0x24, 0xD5, 0x92,\n 0x27, 0x4B, 0x7E, 0xD8, 0x11, 0x93, 0xD7, 0x63\n\nBob's public key: \n\n 0xF7, 0xD4, 0x96, 0xA6, 0x2E, 0xCA, 0x41, 0x63, 0x51, 0x54, 0x0A, 0xA3,\n 0x43, 0xBC, 0x69, 0x0A, 0x61, 0x09, 0xF5, 0x51, 0x50, 0x06, 0x66, 0xB8,\n 0x3B, 0x12, 0x51, 0xFB, 0x84, 0xFA, 0x28, 0x60, 0x79, 0x5E, 0xBD, 0x63,\n 0xD3, 0xB8, 0x83, 0x6F, 0x44, 0xA9, 0xA3, 0xE2, 0x8B, 0xB3, 0x40, 0x17,\n 0xE0, 0x15, 0xF5, 0x97, 0x93, 0x05, 0xD8, 0x49, 0xFD, 0xF8, 0xDE, 0x10,\n 0x12, 0x3B, 0x61, 0xD2\n\nAlice's private key: \n\n 0xD7, 0x5E, 0x54, 0xC7, 0x7D, 0x76, 0x24, 0x89, 0xE5, 0x7C, 0xFA, 0x92,\n 0x37, 0x43, 0xF1, 0x67, 0x77, 0xA4, 0x28, 0x3D, 0x99, 0x80, 0x0B, 0xAC,\n 0x55, 0x58, 0x48, 0x38, 0x93, 0xE5, 0xB0, 0x6D\n\nAlice's public key: \n\n 0x36, 0xAC, 0x68, 0x2C, 0x50, 0x82, 0x15, 0x66, 0x8F, 0xBE, 0xFE, 0x24,\n 0x7D, 0x01, 0xD5, 0xEB, 0x96, 0xE6, 0x31, 0x8E, 0x85, 0x5B, 0x2D, 0x64,\n 0xB5, 0x19, 0x5D, 0x38, 0xEE, 0x7E, 0x37, 0xBE, 0x18, 0x38, 0xC0, 0xB9,\n 0x48, 0xC3, 0xF7, 0x55, 0x20, 0xE0, 0x7E, 0x70, 0xF0, 0x72, 0x91, 0x41,\n 0x9A, 0xCE, 0x2D, 0x28, 0x14, 0x3C, 0x5A, 0xDB, 0x2D, 0xBD, 0x98, 0xEE,\n 0x3C, 0x8E, 0x4F, 0xBF\n\nGenerated shared key (either Alice's public + Bob's private or Bob's\npublic + Alice's private): \n\n 0x9D, 0xAD, 0xE4, 0xF8, 0x6A, 0xC3, 0x48, 0x8B, 0xBA, 0xC2, 0xAC, 0x34,\n 0xB5, 0xFE, 0x68, 0xA0, 0xEE, 0x5A, 0x67, 0x06, 0xF5, 0x43, 0xD9, 0x06,\n 0x1A, 0xD5, 0x78, 0x89, 0x49, 0x8A, 0xE6, 0xBA\n\n### AES Key from ECDH Shared Secret\n\nThis is step 1b (AES key generation) in the GATT [procedure](/nearby/fast-pair/specifications/service/gatt#procedure \"Procedure\").\n\nECDH shared key: \n\n 0x9D, 0xAD, 0xE4, 0xF8, 0x6A, 0xC3, 0x48, 0x8B, 0xBA, 0xC2, 0xAC, 0x34,\n 0xB5, 0xFE, 0x68, 0xA0, 0xEE, 0x5A, 0x67, 0x06, 0xF5, 0x43, 0xD9, 0x06,\n 0x1A, 0xD5, 0x78, 0x89, 0x49, 0x8A, 0xE6, 0xBA\n\nGenerated AES key: \n\n 0xB0, 0x7F, 0x1F, 0x17, 0xC2, 0x36, 0xCB, 0xD3, 0x35, 0x23, 0xC5, 0x15,\n 0xF3, 0x50, 0xAE, 0x57\n\n### Bloom Filter\n\nRandom salt: \n\n 0xC7C8\n\nFirst account key added to the filter (combine with the above random salt): \n\n 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0x00, 0xAA, 0xBB,\n 0xCC, 0xDD, 0xEE, 0xFF\n\nResulting bloom filter: \n\n 0x02, 0x0C, 0x80, 0x2A\n\nBattery data (if it is contained in the advertisement): \n\n 0b00110011, // length = 3, show UI indication.\n 0b01000000, // left bud: not charging, battery level = 64.\n 0b01000000, // right bud: not charging, battery level = 64.\n 0b01000000 // case: not charging, battery level = 64.\n\nResulting bloom filter with battery data: \n\n 0x01, 0x01, 0x46, 0x0A\n\nSecond account key added to the filter (combine with the above random salt): \n\n 0x11, 0x11, 0x22, 0x22, 0x33, 0x33, 0x44, 0x44, 0x55, 0x55, 0x66, 0x66,\n 0x77, 0x77, 0x88, 0x88\n\nResulting bloom filter from both added account keys: \n\n 0x84, 0x4A, 0x62, 0x20, 0x8B\n\nBattery data (if it is contained in the advertisement): \n\n 0b00110011, // length = 3, show UI indication.\n 0b01000000, // left bud: not charging, battery level = 64.\n 0b01000000, // right bud: not charging, battery level = 64.\n 0b01000000 // case: not charging, battery level = 64.\n\nResulting bloom filter from both added account keys with battery data: \n\n 0x46, 0x15, 0x24, 0xD0, 0x08\n\n### AES-CTR Encryption\n\nInput data: \"Someone's Google Headphone\" with utf-8 encoding \n\n 0x53, 0x6F, 0x6D, 0x65, 0x6F, 0x6E, 0x65, 0x27, 0x73, 0x20, 0x47, 0x6F,\n 0x6F, 0x67, 0x6C, 0x65, 0x20, 0x48, 0x65, 0x61, 0x64, 0x70, 0x68, 0x6F,\n 0x6E, 0x65\n\nSecret key: \n\n 0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF, 0x01, 0x23, 0x45, 0x67,\n 0x89, 0xAB, 0xCD, 0xEF\n\nNonce: \n\n 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07\n\nExpected encryption result: \n\n 0xEE, 0x4A, 0x24, 0x83, 0x73, 0x80, 0x52, 0xE4, 0x4E, 0x9B, 0x2A, 0x14,\n 0x5E, 0x5D, 0xDF, 0xAA, 0x44, 0xB9, 0xE5, 0x53, 0x6A, 0xF4, 0x38, 0xE1,\n 0xE5, 0xC6\n\n### HMAC-SHA256\n\nInput data: \n\n 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0xEE, 0x4A, 0x24, 0x83,\n 0x73, 0x80, 0x52, 0xE4, 0x4E, 0x9B, 0x2A, 0x14, 0x5E, 0x5D, 0xDF, 0xAA,\n 0x44, 0xB9, 0xE5, 0x53, 0x6A, 0xF4, 0x38, 0xE1, 0xE5, 0xC6\n\nSecret key: \n\n 0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF, 0x01, 0x23, 0x45, 0x67,\n 0x89, 0xAB, 0xCD, 0xEF\n\nExpected HMAC-SHA256 result: \n\n 0x55, 0xEC, 0x5E, 0x60, 0x55, 0xAF, 0x6E, 0x92, 0x61, 0x8B, 0x7D, 0x87,\n 0x10, 0xD4, 0x41, 0x37, 0x09, 0xAB, 0x5D, 0xA2, 0x7C, 0xA2, 0x6A, 0x66,\n 0xF5, 0x2E, 0x5A, 0xD4, 0xE8, 0x20, 0x90, 0x52\n\n### Encode personalized name to additional data packet\n\nInput data: \"Someone's Google Headphone\" with utf-8 encoding \n\n 0x53, 0x6F, 0x6D, 0x65, 0x6F, 0x6E, 0x65, 0x27, 0x73, 0x20, 0x47, 0x6F,\n 0x6F, 0x67, 0x6C, 0x65, 0x20, 0x48, 0x65, 0x61, 0x64, 0x70, 0x68, 0x6F,\n 0x6E, 0x65\n\nSecret key: \n\n 0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF, 0x01, 0x23, 0x45, 0x67,\n 0x89, 0xAB, 0xCD, 0xEF\n\nNonce: \n\n 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07\n\nExpected additional data packet: \n\n 0x55, 0xEC, 0x5E, 0x60, 0x55, 0xAF, 0x6E, 0x92, 0x00, 0x01, 0x02, 0x03,\n 0x04, 0x05, 0x06, 0x07, 0xEE, 0x4A, 0x24, 0x83, 0x73, 0x80, 0x52, 0xE4,\n 0x4E, 0x9B, 0x2A, 0x14, 0x5E, 0x5D, 0xDF, 0xAA, 0x44, 0xB9, 0xE5, 0x53,\n 0x6A, 0xF4, 0x38, 0xE1, 0xE5, 0xC6\n\n### Decode additional data packet to get personalized name\n\nInput data: \n\n 0x55, 0xEC, 0x5E, 0x60, 0x55, 0xAF, 0x6E, 0x92, 0x00, 0x01, 0x02, 0x03,\n 0x04, 0x05, 0x06, 0x07, 0xEE, 0x4A, 0x24, 0x83, 0x73, 0x80, 0x52, 0xE4,\n 0x4E, 0x9B, 0x2A, 0x14, 0x5E, 0x5D, 0xDF, 0xAA, 0x44, 0xB9, 0xE5, 0x53,\n 0x6A, 0xF4, 0x38, 0xE1, 0xE5, 0xC6\n\nSecret key: \n\n 0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF, 0x01, 0x23, 0x45, 0x67,\n 0x89, 0xAB, 0xCD, 0xEF\n\nExpected name: \"Someone's Google Headphone\" with utf-8 encoding \n\n 0x53, 0x6F, 0x6D, 0x65, 0x6F, 0x6E, 0x65, 0x27, 0x73, 0x20, 0x47, 0x6F,\n 0x6F, 0x67, 0x6C, 0x65, 0x20, 0x48, 0x65, 0x61, 0x64, 0x70, 0x68, 0x6F,\n 0x6E, 0x65\n\n### Encrypted connection status field\n\nField length and type: \n\n 0b001100101 (length = 3, type = connection status field)\n\nConnection state: \n\n 0b10000101:\n\n * on head detection = 1\n * connection availability = 0\n * focus mode = 0\n * auto-reconnected = 0\n * connection state = 0x5 (A2DP with AVRCP)\n\nCustom data: \n\n 0x38\n\nConnected devices bitmap: \n\n 0b00001001\n\nConnection status field raw data (combine above 4 bytes): \n\n 0x35853809\n\nIn use account key (this is the Key): \n\n 0x04, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0x00, 0xAA, 0xBB,\n 0xCC, 0xDD, 0xEE, 0xFF\n\nNon-in use account key: \n\n 0x04, 0x11, 0x22, 0x22, 0x33, 0x33, 0x44, 0x44, 0x55, 0x55, 0x66, 0x66,\n 0x77, 0x77, 0x88, 0x88\n\nRandom salt: \n\n 0xC7C8\n\nAccount key filter (this is IV): this is generated by changing the first byte of\nin use account key from 0b00000100 to 0b00000110. \n\n 0x8C, 0xA9, 0x0C, 0x08, 0x1C\n\nEncrypted connection status field: \n\n 0xF4, 0xBB, 0x40, 0x6F\n\n| **Note:** this is encrypted by the original account key, in other words, the first byte of the key is 0x04 not 0x06"]]
