MadelineProtoDocs/old_docs/API_docs_v42/constructors/passwordKdfAlgoSHA256SHA256PBKDF2HMACSHA512iter100000SHA256ModPow.md

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passwordKdfAlgoSHA256SHA256PBKDF2HMACSHA512iter100000SHA256ModPow	This key derivation algorithm defines that [SRP 2FA login](https://core.telegram.org/api/srp) must be used	https://docs.madelineproto.xyz/favicons/android-chrome-256x256.png

Constructor: passwordKdfAlgoSHA256SHA256PBKDF2HMACSHA512iter100000SHA256ModPow

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This key derivation algorithm defines that SRP 2FA login must be used

Attributes:

Name	Type	Required	Description
salt1	bytes	Yes	One of two salts used by the derivation function (see SRP 2FA login)
salt2	bytes	Yes	One of two salts used by the derivation function (see SRP 2FA login)
g	int	Yes	Base (see SRP 2FA login)
p	bytes	Yes	2048-bit modulus (see SRP 2FA login)

Type: PasswordKdfAlgo

Example:

$passwordKdfAlgoSHA256SHA256PBKDF2HMACSHA512iter100000SHA256ModPow = ['_' => 'passwordKdfAlgoSHA256SHA256PBKDF2HMACSHA512iter100000SHA256ModPow', 'salt1' => 'bytes', 'salt2' => 'bytes', 'g' => int, 'p' => 'bytes'];

Or, if you're into Lua:

passwordKdfAlgoSHA256SHA256PBKDF2HMACSHA512iter100000SHA256ModPow={_='passwordKdfAlgoSHA256SHA256PBKDF2HMACSHA512iter100000SHA256ModPow', salt1='bytes', salt2='bytes', g=int, p='bytes'}