MadelineProtoDocs/docs/API_docs/constructors/passwordKdfAlgoSHA256SHA256PBKDF2HMACSHA512iter100000SHA256ModPow.md
2024-05-01 14:53:46 +02:00

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---
title: "passwordKdfAlgoSHA256SHA256PBKDF2HMACSHA512iter100000SHA256ModPow"
description: "This key derivation algorithm defines that SRP 2FA login must be used"
nav_exclude: true
image: https://docs.madelineproto.xyz/favicons/android-chrome-256x256.png
---
# Constructor: passwordKdfAlgoSHA256SHA256PBKDF2HMACSHA512iter100000SHA256ModPow
[Back to constructors index](/API_docs/constructors/index.html)
This key derivation algorithm defines that [SRP 2FA login](https://core.telegram.org/api/srp) must be used
### Attributes:
| Name | Type | Required | Description |
|----------|---------------|----------|-------------|
|salt1|[bytes](/API_docs/types/bytes.html) | Yes|One of two salts used by the derivation function (see [SRP 2FA login](https://core.telegram.org/api/srp))|
|salt2|[bytes](/API_docs/types/bytes.html) | Yes|One of two salts used by the derivation function (see [SRP 2FA login](https://core.telegram.org/api/srp))|
|g|[int](/API_docs/types/int.html) | Yes|Base (see [SRP 2FA login](https://core.telegram.org/api/srp))|
|p|[bytes](/API_docs/types/bytes.html) | Yes|2048-bit modulus (see [SRP 2FA login](https://core.telegram.org/api/srp))|
### Type: [PasswordKdfAlgo](/API_docs/types/PasswordKdfAlgo.html)
### Example:
```
$passwordKdfAlgoSHA256SHA256PBKDF2HMACSHA512iter100000SHA256ModPow = ['_' => 'passwordKdfAlgoSHA256SHA256PBKDF2HMACSHA512iter100000SHA256ModPow', 'salt1' => 'bytes', 'salt2' => 'bytes', 'g' => int, 'p' => 'bytes'];
```