public static (byte[] pw, byte[] mk, string reqpw) CreateAuthData001(StandardNoteAPI.APIResultAuthParams apiparams, string mail, string uip)
{
if (apiparams.pw_func != StandardNoteAPI.PasswordFunc.pbkdf2)
{
throw new Exception("Unsupported pw_func: " + apiparams.pw_func);
}
byte[] bytes;
if (apiparams.pw_alg == StandardNoteAPI.PasswordAlg.sha512)
{
bytes = PBKDF2.GenerateDerivedKey(apiparams.pw_key_size / 8, Encoding.UTF8.GetBytes(uip), Encoding.UTF8.GetBytes(apiparams.pw_salt), apiparams.pw_cost, PBKDF2.HMACType.SHA512);
}
else if (apiparams.pw_alg == StandardNoteAPI.PasswordAlg.sha512)
{
bytes = PBKDF2.GenerateDerivedKey(apiparams.pw_key_size / 8, Encoding.UTF8.GetBytes(uip), Encoding.UTF8.GetBytes(apiparams.pw_salt), apiparams.pw_cost, PBKDF2.HMACType.SHA512);
}
else
{
throw new Exception("Unknown pw_alg: " + apiparams.pw_alg);
}
var pw = bytes.Take(bytes.Length / 2).ToArray();
var mk = bytes.Skip(bytes.Length / 2).ToArray();
var reqpw = EncodingConverter.ByteToHexBitFiddleLowercase(pw);
return(pw, mk, reqpw);
}
public static (byte[] mk, byte[] sp, string reqpw) CreateAuthData004(StandardNoteAPI.APIResultAuthParams apiparams, string mail, string uip)
{
var salt = StandardNoteCrypt.SHA256Bytes(string.Join(":", apiparams.identifier, apiparams.pw_nonce)).Take(128 / 8).ToArray();
var derivedKey = ANCrypt.Argon2(Encoding.UTF8.GetBytes(uip), salt, 5, 64 * 1024, 64);
var masterKey = derivedKey.Skip(00).Take(32).ToArray();
var serverPassword = derivedKey.Skip(32).Take(32).ToArray();
var requestPassword = EncodingConverter.ByteToHexBitFiddleLowercase(serverPassword);
return(masterKey, serverPassword, requestPassword);
}
public static (byte[] pw, byte[] mk, byte[] ak, string reqpw) CreateAuthData003(StandardNoteAPI.APIResultAuthParams apiparams, string mail, string uip)
{
if (apiparams.pw_cost < 100000)
{
throw new StandardNoteAPIException($"Account pw_cost is too small ({apiparams.pw_cost})");
}
var salt = StandardNoteCrypt.SHA256Hex(string.Join(":", mail, "SF", "003", apiparams.pw_cost.ToString(), apiparams.pw_nonce));
byte[] bytes = PBKDF2.GenerateDerivedKey(768 / 8, Encoding.UTF8.GetBytes(uip), Encoding.UTF8.GetBytes(salt), apiparams.pw_cost, PBKDF2.HMACType.SHA512);
var pw = bytes.Skip(0 * (bytes.Length / 3)).Take(bytes.Length / 3).ToArray();
var mk = bytes.Skip(1 * (bytes.Length / 3)).Take(bytes.Length / 3).ToArray();
var ak = bytes.Skip(2 * (bytes.Length / 3)).Take(bytes.Length / 3).ToArray();
var reqpw = EncodingConverter.ByteToHexBitFiddleUppercase(pw).ToLower();
return(pw, mk, ak, reqpw);
}
public static (byte[] pw, byte[] mk, byte[] ak, string reqpw) CreateAuthData002(StandardNoteAPI.APIResultAuthParams apiparams, string uip)
{
if (apiparams.pw_func != StandardNoteAPI.PasswordFunc.pbkdf2)
{
throw new Exception("Unknown pw_func: " + apiparams.pw_func);
}
byte[] bytes = PBKDF2.GenerateDerivedKey(768 / 8, Encoding.UTF8.GetBytes(uip), Encoding.UTF8.GetBytes(apiparams.pw_salt), apiparams.pw_cost, PBKDF2.HMACType.SHA512);
var pw = bytes.Skip(0 * (bytes.Length / 3)).Take(bytes.Length / 3).ToArray();
var mk = bytes.Skip(1 * (bytes.Length / 3)).Take(bytes.Length / 3).ToArray();
var ak = bytes.Skip(2 * (bytes.Length / 3)).Take(bytes.Length / 3).ToArray();
var reqpw = EncodingConverter.ByteToHexBitFiddleUppercase(pw).ToLower();
return(pw, mk, ak, reqpw);
}
