//  size=30
message ClientResponseEncrypted {
    required LoginCredentials login_credentials = 0xa; // idx=0 offset=c
    optional AccountCreation account_creation = 0x14; // idx=1 offset=10
    optional FingerprintResponseUnion fingerprint_response = 0x1e; // idx=2 offset=14
    optional PeerTicketUnion peer_ticket = 0x28; // idx=3 offset=18
    required SystemInfo system_info = 0x32; // idx=4 offset=1c
    optional string platform_model = 0x3c; // idx=5 offset=20
    optional string version_string = 0x46; // idx=6 offset=24
    optional LibspotifyAppKey appkey = 0x50; // idx=7 offset=28
    optional ClientInfo client_info = 0x5a; // idx=8 offset=2c
}

//  size=18
message LoginCredentials {
    optional string username = 0xa; // idx=0 offset=c
    required Type typ = 0x14; // idx=1 offset=10
    optional bytes auth_data = 0x1e; // idx=2 offset=14
}

enum Type {
    AUTHENTICATION_USER_PASS = 0x0;
    AUTHENTICATION_STORED_SPOTIFY_CREDENTIALS = 0x1;
    AUTHENTICATION_STORED_FACEBOOK_CREDENTIALS = 0x2;
    AUTHENTICATION_SPOTIFY_TOKEN = 0x3;
    AUTHENTICATION_FACEBOOK_TOKEN = 0x4;
}

enum AccountCreation {
    ACCOUNT_CREATION_ALWAYS_PROMPT = 0x1;
    ACCOUNT_CREATION_ALWAYS_CREATE = 0x3;
}

//  size=14
message FingerprintResponseUnion {
    optional FingerprintGrainResponse grain = 0xa; // idx=0 offset=c
    optional FingerprintHmacRipemdResponse hmac_ripemd = 0x14; // idx=1 offset=10
}

//  size=1c
message FingerprintGrainResponse {
    required bytes encrypted_key = 0xa; // idx=0 offset=c size=f
}

//  size=20
message FingerprintHmacRipemdResponse {
    required bytes hmac = 0xa; // idx=0 offset=c size=13
}

//  size=14
message PeerTicketUnion {
    optional PeerTicketPublicKey public_key = 0xa; // idx=0 offset=c
    optional PeerTicketOld old_ticket = 0x14; // idx=1 offset=10
}

//  size=8c
message PeerTicketPublicKey {
    required bytes public_key = 0xa; // idx=0 offset=c size=7f
}

//  size=90
message PeerTicketOld {
    required bytes peer_ticket = 0xa; // idx=0 offset=c
    required bytes peer_ticket_signature = 0x14; // idx=1 offset=10 size=7f
}

//  size=34
message SystemInfo {
    required CpuFamily cpu_family = 0xa; // idx=0 offset=c
    optional uint32 cpu_subtype = 0x14; // idx=1 offset=10
    optional uint32 cpu_ext = 0x1e; // idx=2 offset=14
    optional Brand brand = 0x28; // idx=3 offset=18
    optional uint32 brand_flags = 0x32; // idx=4 offset=1c
    required Os os = 0x3c; // idx=5 offset=20
    optional uint32 os_version = 0x46; // idx=6 offset=24
    optional uint32 os_ext = 0x50; // idx=7 offset=28
    optional string system_information_string = 0x5a; // idx=8 offset=2c
    optional string device_id = 0x64; // idx=9 offset=30
}

enum CpuFamily {
    CPU_UNKNOWN = 0x0;
    CPU_X86 = 0x1;
    CPU_X86_64 = 0x2;
    CPU_PPC = 0x3;
    CPU_PPC_64 = 0x4;
    CPU_ARM = 0x5;
    CPU_IA64 = 0x6;
    CPU_SH = 0x7;
    CPU_MIPS = 0x8;
    CPU_BLACKFIN = 0x9;
}

enum Brand {
    BRAND_UNBRANDED = 0x0;
    BRAND_INQ = 0x1;
    BRAND_HTC = 0x2;
    BRAND_NOKIA = 0x3;
}

enum Os {
    OS_UNKNOWN = 0x0;
    OS_WINDOWS = 0x1;
    OS_OSX = 0x2;
    OS_IPHONE = 0x3;
    OS_S60 = 0x4;
    OS_LINUX = 0x5;
    OS_WINDOWS_CE = 0x6;
    OS_ANDROID = 0x7;
    OS_PALM = 0x8;
    OS_FREEBSD = 0x9;
    OS_BLACKBERRY = 0xa;
    OS_SONOS = 0xb;
    OS_LOGITECH = 0xc;
    OS_WP7 = 0xd;
    OS_ONKYO = 0xe;
    OS_PHILIPS = 0xf;
    OS_WD = 0x10;
    OS_VOLVO = 0x11;
    OS_TIVO = 0x12;
    OS_AWOX = 0x13;
    OS_MEEGO = 0x14;
    OS_QNXNTO = 0x15;
    OS_BCO = 0x16;
}

//  size=168
message LibspotifyAppKey {
    required uint32 version = 0x1; // idx=0 offset=c
    required bytes devkey = 0x2; // idx=1 offset=10 size=7f
    required bytes signature = 0x3; // idx=2 offset=90 size=bf
    required string useragent = 0x4; // idx=3 offset=150
    required bytes callback_hash = 0x5; // idx=4 offset=154 size=13
}

//  size=18
message ClientInfo {
    optional bool limited = 0x1; // idx=0 offset=c
    optional ClientInfoFacebook fb = 0x2; // idx=1 offset=10
    optional string language = 0x3; // idx=2 offset=14
}

//  size=10
message ClientInfoFacebook {
    optional string machine_id = 0x1; // idx=0 offset=c
}

message AuthSuccess {
    required string username = 0x0a;
    required uint32 data1 = 0x14;
    required uint32 data2 = 0x19;
    required uint32 data3 = 0x1e;
    required bytes  data4 = 0x28;
    required bytes  data5 = 0x32;
}

message AuthFailure {
    required uint32 code = 0x0a;
    required Data1 data1 = 0x32;

    message Data1 {
        required string data0 = 0x01;
    }
}