Casos de teste criptográficos
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Esta página descreve os testes que um provedor pode criar para verificar a criptografia
componentes da implementação do provedor.
O Google recomenda implementar esses testes com antecedência para facilitar a integração do Pareamento rápido.
Casos de teste
Esses casos abrangem:
- Hash
- O filtro "Bloom"
- Criptografia AES e troca de chaves públicas
- Como codificar e decifrar mensagens
hash SHA-256
Valor de entrada:
0x11, 0x22, 0x33, 0x44, 0x55, 0x66
Resultado em hash:
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
Criptografia AES
Valor de entrada:
0xF3, 0x0F, 0x4E, 0x78, 0x6C, 0x59, 0xA7, 0xBB, 0xF3, 0x87, 0x3B, 0x5A,
0x49, 0xBA, 0x97, 0xEA
Chave secreta:
0xA0, 0xBA, 0xF0, 0xBB, 0x95, 0x1F, 0xF7, 0xB6, 0xCF, 0x5E, 0x3F, 0x45,
0x61, 0xC3, 0x32, 0x1D
Saída criptografada:
0xAC, 0x9A, 0x16, 0xF0, 0x95, 0x3A, 0x3F, 0x22, 0x3D, 0xD1, 0x0C, 0xF5,
0x36, 0xE0, 0x9E, 0x9C
Troca de chaves ECDH
Chave privada de Beto:
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
Chave pública de Beto:
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
Chave privada de Alice:
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
Chave pública de Alice:
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
Chave compartilhada gerada (seja a pública da Alice + a privada do Bob ou a do Bob
público + privado de Alice):
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
Chave AES do secret compartilhado do ECDH
Esta é a etapa 1b (geração de chaves AES) no procedimento do GATT.
Chave compartilhada ECDH:
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
Chave AES gerada:
0xB0, 0x7F, 0x1F, 0x17, 0xC2, 0x36, 0xCB, 0xD3, 0x35, 0x23, 0xC5, 0x15,
0xF3, 0x50, 0xAE, 0x57
Filtro de flores
Sal aleatório:
0xC7C8
Primeira chave da conta adicionada ao filtro (combinada com o sal aleatório acima):
0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0x00, 0xAA, 0xBB,
0xCC, 0xDD, 0xEE, 0xFF
Filtro de flores resultante:
0x02, 0x0C, 0x80, 0x2A
Dados da bateria (se estiverem contidos na publicidade):
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.
Filtro de flores resultante com os dados da bateria:
0x01, 0x01, 0x46, 0x0A
Segunda chave de conta adicionada ao filtro (combinada com o sal aleatório acima):
0x11, 0x11, 0x22, 0x22, 0x33, 0x33, 0x44, 0x44, 0x55, 0x55, 0x66, 0x66,
0x77, 0x77, 0x88, 0x88
Filtro Bloom resultante das duas chaves de conta adicionadas:
0x84, 0x4A, 0x62, 0x20, 0x8B
Dados da bateria (se estiverem contidos na publicidade):
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.
Filtro Bloom resultante das duas chaves de conta adicionadas com os dados da bateria:
0x46, 0x15, 0x24, 0xD0, 0x08
Criptografia AES-CTR
Dados de entrada: "Fone de ouvido do Google de alguém" com codificação utf-8
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
Chave secreta:
0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF, 0x01, 0x23, 0x45, 0x67,
0x89, 0xAB, 0xCD, 0xEF
Valor de uso único:
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07
Resultado esperado da criptografia:
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
Dados de entrada:
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
Chave secreta:
0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF, 0x01, 0x23, 0x45, 0x67,
0x89, 0xAB, 0xCD, 0xEF
Resultado de HMAC-SHA256 esperado:
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
Codificar o nome personalizado no pacote de dados extra
Dados de entrada: "Fone de ouvido do Google de alguém" com codificação utf-8
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
Chave secreta:
0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF, 0x01, 0x23, 0x45, 0x67,
0x89, 0xAB, 0xCD, 0xEF
Valor de uso único:
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07
Pacote de dados extra esperado:
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
Decodifique o pacote de dados extra para ter um nome personalizado
Dados de entrada:
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
Chave secreta:
0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF, 0x01, 0x23, 0x45, 0x67,
0x89, 0xAB, 0xCD, 0xEF
Nome esperado: "Fone de ouvido do Google de alguém" com codificação utf-8
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
Campo de status da conexão criptografada
Comprimento e tipo do campo:
0b001100101 (length = 3, type = connection status field)
Estado da conexão:
0b10000101:
* on head detection = 1
* connection availability = 0
* focus mode = 0
* auto-reconnected = 0
* connection state = 0x5 (A2DP with AVRCP)
Dados personalizados:
0x38
Bitmap de dispositivos conectados:
0b00001001
Dados brutos do campo de status da conexão (combinar acima de 4 bytes):
0x35853809
Chave da conta em uso (esta é a chave):
0x04, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0x00, 0xAA, 0xBB,
0xCC, 0xDD, 0xEE, 0xFF
Chave da conta que não está em uso:
0x04, 0x11, 0x22, 0x22, 0x33, 0x33, 0x44, 0x44, 0x55, 0x55, 0x66, 0x66,
0x77, 0x77, 0x88, 0x88
Sal aleatório:
0xC7C8
Filtro da chave de conta (IV): gerado pela alteração do primeiro byte do
em uso na chave de conta de 0b00000100 a 0b00000110.
0x8C, 0xA9, 0x0C, 0x08, 0x1C
Campo de status da conexão criptografada:
0xF4, 0xBB, 0x40, 0x6F
Exceto em caso de indicação contrária, o conteúdo desta página é licenciado de acordo com a Licença de atribuição 4.0 do Creative Commons, e as amostras de código são licenciadas de acordo com a Licença Apache 2.0. Para mais detalhes, consulte as políticas do site do Google Developers. Java é uma marca registrada da Oracle e/ou afiliadas.
Última atualização 2025-08-13 UTC.
[null,null,["Última atualização 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"]]
