> For the complete documentation index, see [llms.txt](https://mind-expression-docs.gitbook.io/home/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mind-expression-docs.gitbook.io/home/how-to-guides/intelligent-process/package-cryptography.md).

# Package: Cryptography

## Class: BCrypt

### Introduction

**Environment: `container`**

Bcrypt is a cryptographic hash function designed for password hashing and safe storing in the backend of applications in a way that is less susceptible to dictionary-based cyberattacks.

It accepts the following attributes

* `identifier`: the hash alogorithm identifier, it can be `'2a'` or `'2b'`. The default value is `'2b'`.
* `password`: The plain text password to be hashed.
* `round`: A numeric cost is added in front of the salt and the password hashes, showing how many password iterations were made before the hash was generate. The default value is `12`.
* `salt`: A 16-byte salt value is added in front of the plain text password, it is random by default.

After configuring the attributes, the `token` method can be leveraged to obtain the hashed password.

For example:

```smalltalk
bcrypt := BCrypt new.
bcrypt identifier: '2b'.
bcrypt password: 'password'.
bcrypt salt: #[40 38 165 61 211 214 154 81 150 63 16 222 93 78 171 1].
bcrypt round: 10.

" The hashed password can be added to a web hook's http header as follows in a talk rule: "
self httpHeaders at: 'authentication' put: bcrypt token.
```

### Instance Method

#### Category: accessing

* **`identifier`** - Get the identifier of the BCrypt.
* **`identifier:`** - Set the identifier of the BCrypt.
* **`password`** - Get the password of the BCrypt.
* **`password:`** - Set the password of the BCrypt.
* **`round`** - Get the round of the BCrypt.
* **`round:`** - Set the round of the BCrypt.
* **`salt`** - Get the salt of the BCrypt.
* **`salt:`** - Set the salt of the BCrypt.

#### Category: encode

* **`token`** - Answer the hashed password as a string.

  For example:

  ```smalltalk
  bcrypt := BCrypt new.
  bcrypt password: 'password'.
  bcrypt token.
  ```